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SERVICE MANUAL
VIDEO CASSETTE RECORDER SERVICE MANUAL
(FC230Y/FC431Y/FD240Y/FD941NY/FC290Y/FC491Y/FC991NY/FC999NY)
CAUTION
BEFORE SERVICING THE UNIT, READ THE "SAFETY PRECAUTIONS" IN THIS MANUAL.
MODELS : LV2378/LV2578/LV2288/LV2788/LV3398/LV3598/LV3798/LV3799(FC230Y/FC431Y/FD240Y/FD941NY/FC290Y/FC491Y/FC991NY/FC999NY)
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P/NO : 3829RVP044A MARCH, 2003
LV2378/LV2578
VIDEO IN
AV3 L-AUDIO IN-R
PROG.
REC/ITR
P/STILL
LV2288/LV2788
LV3398/LV3598/LV3798/LV3799
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MODELS : LV2378/LV2578/LV2288/LV2788/LV3398/LV3598/LV3798/LV3799
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TABLE OF CONTENTS
SECTION 1 SUMMARY
KEY TO ABBREVIATIONS . . . . . . . . . . . . . . . . 1-1 PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS . . . . . . . . . . . . . . . . . . 1-2 SERVICING PRECAUTIONS . . . . . . . . . . . . . . . 1-3 PROPOSAL FOR APPLYING SHORT PROTECTION . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4 SERVICE NOTICE ON REPLACING EEPROM . .1-5 SERVICE INFORMATION FOR EEPROM IC SETTING . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6 SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . 1-7 CIRCUIT DIAGRAMS . . . . . . . . . . . . . . . . . . . .3-29
1. Power Circuit Diagram . . . . . . . . . . 2. Tuner, NICAM/A2 Circuit Diagram . 3. A/V, SECAM, VPS Circuit Diagram 4. System Circuit Diagram . . . . . . . . . 5. Hi-Fi, SCART Circuit Diagram . . . . · CIRCUIT VOLTAGE CHART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-29 .3-31 .3-33 .3-36 .3-39 .3-41
PRINTED CIRCUIT BOARD DIAGRAMS . . . . .3-45
1. MAIN P.C.Board . . . . . . . . . . . . . . . . . . . . . . . .3-45 2. KEY (LEFT) P.C.Board . . . . . . . . . . . . . . . . . . .3-47
SECTION 4 MECHANISM
NOTE) The table of contents for this section is edited NOTE) separately.
SECTION 2 CABINET & MAIN CHASSIS
SERVICE METHOD . . . . . . . . . . . . . . . . . . . . . 2-1
Electrical Part . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
EXPLODED VIEWS . . . . . . . . . . . . . . . . . . . . . . 2-2
1. Cabinet & Main Frame Section . . . . . . . . . . . . . 2-2 2. Packing & Accessory Section . . . . . . . . . . . . . . 2-3
SECTION 5 REPLACEMENT PARTS LIST
· Mechanical Section . . . . . . . . . . . . . . . . . . . . . . . .5-1 · Electrical Section . . . . . . . . . . . . . . . . . . . . . . . . .5-4
SECTION 3 ELECTRICAL
ELECTRICAL ADJUSTMENT POINTS ARRANGEMENT . . . . . . . . . . . . . . . . . . . . . . . .3-1 ELECTRICAL ADJUSTMENT PROCEDURES . . 3-2
1. Servo Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
ELECTRICAL TROUBLESHOOTING GUIDE . . . 3-4
1. Power Circuit(SMPS) . . . . . . . . . . . . . . . . . . . . . 3-4 2. Servo Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . .3-7 3. System & Front Panel Circuit . . . . . . . . . . . . . . .3-10 4. Y/C Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-12 5. Tuner/IF Circuit . . . . . . . . . . . . . . . . . . . . . . . . .3-16 6. Hi-Fi Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-19
BLOCK DIAGRAMS . . . . . . . . . . . . . . . . . . . . .3-21
1. Power Block Diagram . . . . . . . . . . . . . . . . . . . .3-21 2. Tuner/IF, NICAM & A2 Block Diagram 3. VPS Block Diagram . . . . . . . . . . . . . . 4. Y/C Block Diagram . . . . . . . . . . . . . . 5. Hi-Fi Block Diagram . . . . . . . . . . . . . 6. System Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-23 .3-24 .3-25 .3-26 .3-27
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SECTION1 SUMMARY
KEY TO ABBREVIATIONS
A AC ACC ACSS ADJ A/E AFC AFT AGC A.H.SW ALC AM AMP ANT APC ASS'Y AUX B BGP BPF BS BW or B/W C CAN CAP CAP.BRK CAP.RVS CATV CBA CCD C.CTL CFG CHROMA CNR COMB COMP :Alternating Current :Automatic Color Control :Automatic Channel Setting System :Adjust :Audio Erase :Automatic Frequency Control :Automatic Fine Tuning :Automatic Gain Control :Audio Head Switch :Automatic Level Control :Amplitude Modulation :Amplifier :Antenna :Automatic Phase Control :Assembly :Auxiliary :Base :Burst Gate Pulse :Bandpass Filter :Brodcasting Satellite :Black and White :Capacitor, Chroma, Collector :Cancel :Capstan :Capstan Brake :Capstan Reverse :Cable Television :Circuit Board Assembly :Charge Coupled Device :Chro Control, Capstan Control :Capstan Frequency Generator :Chrominance :Chroma Noise Redution :Combination Comb Filter :Comparator Composite Compensation :Converter :Color Rotary Switch :Chip Selcet :Composite Synchronization :Control Divide :Current :Cylinder :Drum, Digital, Diode, Drain :Drum Adjust :Direct Current :Drum Control :Demodulator :Detector :Deviation :Double High Pass :Digital Display Tube :Delay line :Drop Out Compensator :Dubbing :Dummy Vertical Synchronization :Emitter :Electric to Eletric :Emphasis :Enable :Envelope :Extended Play :Equalizer :Expander :Fuse :Feed Back :Feed Back Clamp :Full Erase :Frequency Generator :Filter :Frequency Modulation :Front/Rear :Frequency Synthesizer :Subcarrier Frequency :Frequency Voltage :Generator :High, Horizontal :Integrated Circuit :Intermediate Frequency :Insert :Low, Left, Coil :LED :Loading Voltage Control :Letter Character :Level Meter :Long Play M LPF MAX MD MECHA.CTL MIC MIN MIX M.M. MMV MOD MODEM MPX NR OSC OSD PB PCB P.CTL PRE-AMP P.F PG PLL PREM.DET P.P PS PWM PWR CTL Q QH QSR QTR QV R RE(or RC) REC REC S `H' REF REG REMOCON RF R/P RTC S S.ACCEL SAOP SC S.DET SH SHARP SIF SLD S/N SP ST SUB SW or S/W SYNC SYSCON T TP TR TRK TRANS TU UHF UNREG V VA VCO VGC VHF V.H.SW VISS VPS VR V-SYNC VTG VV VXO W WHT W/O X-TAL Y/C YNR ZD :Low Pass Filter :Maximum :Modulator :Mechanism Control :Microphone :Minimum :Mixer, Mixing :Monostable, Multivibrator :Mono Multi Vibrator :Modulation, Modulator :Modulator-Demodulator :Multiplex :Noise Reduction :Oscillator :On Screen Display :Playback :Printed Circuit Board :Power Control :Preamplifier :Power Failure :Pulse Generator :Phase Locked Loop :Premire Detect :Peak-to-Peak :Phase Shift :Pulse Width Modulation :Power Control :Transistor :Quasi Horizontal :Quick Setting Record :Quick Timer Record :Quasi Vertical :Resistor, Right :Remocon, Receiver :Recording :Record Start `Hight' :Reference :Regulated, Regulator :Remote Control(unit) :Radio Frequency :Record/Playback :Reel Time Counter :Serial :Slow Accel :Second Audio Program :Scart, Simulcast :Secam Detect :Shift :Sharpness :Sound Intermediate Frequency :Side Locking :Signal to Noise Ratio :Standard Play :Stereo :Subtract, Subcarrier :Switch :Synchronization :System Control :Coil :Test Point :Transistor :Tracking :Transformer :Tuner, Take-up :Ultra High Frequency :Unregulated :Volt, Vertical :Always Voltage :Voltage Controlled Oscillator :Voltage Gain Control :Very High Frequency :Video Head Switch :VHS Index Search :Video Program System :Variable Resistor or Volume :Vertical Synchronization :Voltage :Voltage to Voltage :Voltage X-tal Oscillator :Watt :White :With out :Crystal :Luminance/Chrominance :Luminance Noise Reduction :Zener Diode
N O P
B
C
Q
R
D
E
F
G H I
L
CONV C.ROT SW CS C.SYNC CTL DIV CUR CYL D D.ADJ DC D.CTL DEMOD DET DEV DHP DIGITRON DL DOC DUB D.V SYNC E EE EMPH ENA ENV EP EQ EXP F FB FBC FE FG FL FM F/R FS FSC F/V GEN H IC IF INS L LD LD VTG CTL LECHA L.M LP
S
T
U V
W
X Y Z
1-1
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PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS
IMPORTANT SAFETY NOTICE This manual was prepared for use only by properly trained audio-video service technicians. When servicing this product, under no circumstances should the original design be modified or altered without permission from LG Electronics Corporation. All components should be replaced only with types identical to those in the original circuit and their physical location, wiring and lead dress must conform to original layout upon completion of repairs. Special components are also used to prevent x-radiation, shock and fire hazard. These components are indicated by the letter "x" included in their component designators and are required to maintain safe performance. No deviations are allowed without prior approval by LG Electronics Corporation. Circuit diagrams may occasionally differ from the actual circuit used. This way, implementation of the latest safety and performance improvement changes into the set is not delayed until the new service literature is printed. CAUTION: Do not attempt to modify this product in any way. Never perform customized installations without manufacturer's approval. Unauthorized modifications will not only void the warranty, but may lead to property damage or user injury. Service work should be performed only after you are thoroughly familiar with these safety checks and servicing guidelines. GRAPHIC SYMBOLS The exclamation point within an equilateral triangle is intended to alert the service personnel to important safety information in the service literature. The lightning flash with arrowhead symbol within an equilateral triangle is intended to alert the service personnel to the presence of noninsulated "dangerous voltage" that may be of sufficient magnitude to constitute a risk of electric shock. The pictorial representation of a fuse and its rating within an equilateral triangle is intended to convey to the service personnel the following fuse replacement caution notice: CAUTION: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ALL FUSES WITH THE SAME TYPE AND RATING AS MARKED NEAR EACH FUSE. SERVICE INFORMATION While servicing, use an isolation transformer for protection from AC line shock. After the original service problem has been corrected, make a check of the following: FIRE AND SHOCK HAZARD 1. Be sure that all components are positioned to avoid a possibility of adjacent component shorts. This is especially important on items trans-ported to and from the repair shop. 2. Verify that all protective devices such as insulators, barriers, covers, shields, strain reliefs, power supply cords, and other hardware have been reinstalled per the original design. Be sure that the safety purpose of the polarized line plug has not been defeated. 3. Soldering must be inspected to discover possible cold solder joints, solder splashes, or sharp solder points. Be certain to remove all loose foreign particles. 4. Check for physical evidence of damage or deterioration to parts and components, for frayed leads or damaged insulation (including the AC cord), and replace if necessary. 5. No lead or component should touch a high current device or a resistor rated at 1 watt or more. Lead tension around protruding metal surfaces must be avoided. 6. After reassembly of the set, always perform an AC leakage test on all exposed metallic parts of the cabinet (the channel selector knobs, antenna terminals, handle and screws) to be sure that set is safe to operate without danger of electrical shock. DO NOT USE A LINE ISOLATION TRANSFORMER DURING THIS TEST. Use an AC voltmeter having 5000 ohms per volt or more sensitivity in the following manner: Connect a 1500 ohm, 10 watt resistor, paralleled by a .15 mfd 150V AC type capacitor between a known good earth ground water pipe, conduit, etc.) and the exposed metallic parts, one at a time. Measure the AC voltage across the combination of 1500 ohm resistor and .15 mfd capacitor. Reverse the AC plug by using a non-polarized adaptor and repeat AC voltage measurements for each exposed metallic part. Voltage measured must not exceed 0.75 volts RMS. This corresponds to 0.5 milliamp AC. Any value exceeding this limit constitutes a potential shock hazard and must be corrected immediately.
0.15uF Good Earth Ground such as the Water Pipe, Conduit, etc. 1500 OHM Place this probe on each exposed metal part.
A.C. Voltmeter
10 WATT
X-RADIATION 1. Be sure procedures and instructions to all service personnel cover the subject of x-radiation. The only potential source of x-rays in current TV receivers is the picture tube. However, this tube does not emit x-rays when the HV is at the factory-specified level. The proper value is given in the applicable schematic. Operation at higher voltages may cause a failure of the picture tube or high-voltage supply and, under certain circumstances may produce radiation in excess of desirable levels. 2. Only factory-specified CRT anode connectors must be used. 3. It is essential that the service personnel have available an accurate and reliable high-voltage meter. 4. When the high-voltage circuitry is operating properly, there is no possibility of an x-radiation problem. Every time a chassis is serviced, the brightness should be run up and down while monitoring the high voltage with a meter, to be certain that the high voltage does not exceed the specified value and that it is regulating correctly. 5. When troubleshooting and making test measurements in a product with a problem of excessively high voltage, avoid being unnecessarily close to the picture tube and the high voltage power supply. Do not operate the product longer than necessary to locate the cause of excessive voltage. 6. Refer to the CRT Anode High Voltage Measurement and Shutdown Adjustment procedures described in the appropriate text (where used). IMPLOSION 1. All direct view picture tubes are equipped with an integral implosion protection system; take care to avoid damage during installation. 2. Use only the recommended factory replacement tubes. TIPS ON PROPER INSTALLATION 1. Never install any receiver in a closed-in recess, cubbyhole, or closely fitting shelf space over, or close to, a heat duct, or in the path of heated air flow. 2. Avoid conditions of high humidity such as: outdoor patio installations where dew is a factor, near steam radiators where steam leakage is a factor, etc. 3. Avoid placement where draperies may obstruct venting. The customer should also avoid the use of decorative scarves or other coverings that might obstruct ventilation. 4. Wall- and shelf-mounted installations using a commercial mounting kit must follow the factory-approved mounting instructions. A product mounted to a shelf or platform must retain its original feet (or the equivalent thickness in spacers) to provide adequate air flow across the bottom. Bolts or screws used for fasteners must not touch any parts or wiring. Perform leakage tests on customized installations. 5. Caution customers against mounting a product on a sloping shelf or in a tilted position, unless the receiver is properly secured. 6. A product on a roll-about cart should be stable in its mounting to the cart. Caution the customer on the hazards of trying to roll a cart with small casters across thresholds or deep pile carpets. 7. Caution customers against using a cart or stand that has not been listed by Underwriters Laboratories, Inc. for use with its specific model of television receiver or generically approved for use with TVs of the same or larger screen size. 8. Caution customers against using extension cords. Explain that a forest of extensions, sprouting from a single outlet, can lead to disastrous consequences to home and family.
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SERVICING PRECAUTIONS
CAUTION : Before servicing the VCR covered by this service data and its supplements and ADDENDUMS, read and follow the SAFETY PRECAUTIONS. NOTE : if unforeseen circumstances create conflict between the following servicing precautions and any of the safety precautions in this publications, always follow the safety precautions. Remember Safety First: General Servicing Precautions 1. Always unplug the VCR AC power cord from the AC power source before: (1) Removing or reinstalling any component, circuit board, module, or any other assembly. (2) Disconnection or reconnecting any internal electrical plug or other electrical connection. (3) Connecting a test substitute in parallel with an electrolytic capacitor. Caution : A wrong part substitution or incorrect polarity installation of electrolytic capacitors may result in an explosion hazard. 2. Do not spray chemicals on or near this VCR or any of its assemblies. 3. Unless specified otherwise in this service data, clean electrical contacts by applying an appropriate contact cleaning solution to the contacts with a pipe cleaner, cotton-tipped swab, or comparable soft applicator. Unless specified otherwise in this service data, lubrication of contacts is not required. 4. Do not defeat any plug/socket B+ voltage interlocks with whitch instruments covered by this service manual might be equipped. 5. Do not apply AC power to this VCR and/or any of its electrical assemblies unless all solid-state device heat sinks are cerrectly installed. 6. Always connect test instrument ground lead to the appropriate ground before connection the test instrument positive lead. Always remove the test instrument ground lead last. Insulation Checking Procedure Disconnect the attachment plug from the AC outlet and turn the power on. Connect an insulation resistance meter(500V) to the blades of the attachment plug. The insulation resistance between each blade of the attachment plug and accessible conductive parts (Note 1) should be more than 1Mohm. Note 1 : Accessible Conductive Parts including Metal panels, Input terminals, Earphone jacks, etc. Electrostatically Sensitive (ES) Devices Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field effect transistors and semiconductor chip components. The following techniques should be used to help reduce the incidence of component damage caused by static electricity. 1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any electrostatic charge on your body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging wrist strap device, which should be removed for potential shock reasons prior to applying power to the unit under test. 2. After removing an electrical assembly equipped with ES devices, place the assembly on a conductive surface such as aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly. 3. Use only a GROUNDED-tip soldering iron to solder or unsolder ES devices. 4. Use only an anti-static solder removal device. Some solder removal devices not classified a "anti-static" can generate electrical charges sufficient to damage ES devices. 5. Do not use freon-propelled chemicals. These can generate electrical charge sufficient to damage ES devices. 6. Do not remove a replacement ES device from its protec tive package until immediately before you are ready to install it. (Most replacement ES devices are packaged with leads electrically shorted together by conductive foam, aluminum foil, or comparable conductive material).
7. Immediately before removing the protective material from the leads of a replacement ES device, touch the protective material to the chassis or circuit assembly into which the device will be installed. Caution : Be sure no power is applied to the chassis or circuit, and observe all other safety precautions. 8. Minimize bodily motions when handling unpackaged replacement ES devices. (Normally harmless motion such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity sufficient to damage an ES device.)
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PROPOSAL FOR APPLYING SHORT PROTECTION
· The Contents of Examination
As all the IC that is applied to VCR is controlled by IIC, mutual communication, if Vcc of IC is short or open with detecting `Acknowledge' data of the specific IC according to each power(5V, 5VT) µ-COM gets unable to detect `ACK' data. µ-COM regards this case as abnormal one and if it can't detect `ACK' data for a certain time(3.5 sec) the signal of `Power Control' and `Timer Control' are switched to `Low'. As a result POWER Switching TR is kept from generating heat and fire.
Conception BLOCK Diagram
5VT SW
TIMER CONTROL
SLAVE with 5V IIC BUS SLAVE with 5V POWER CONTROL MASTER
5VT SW
· POWER for each IC
5.2V
Modulator 5.3VA Hi-Fi IC NICAM IC SECAM IC Power Control Timer Control 5.3VA AVCP IC TUNER
5.2VT
· IC to detect `ACK' data is selected as below because IC is different in accordance to region and option
S/ Series P/Y/I Series
5V POWER 5VT POWER 5V POWER 5VT POWER
SECAM IC AVCP IC Modulator AVCP IC
*Short protection off mode : DJ01 Diode in
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SERVICE NOTICE ON REPLACING EEPROM
In case that defective EEPROM of PAL models is replaced, to operate these sets from the initial state MP KEY must be repaired as well before delivering to the customer. If MP KEY isn't repaired the setting of RF OUT channel or LANGUAGE might be different from that for custormer's country. ·MP KEY : In case of PAL VCR if holding the REC button on the front panel and the CLEAR button on the remote control handset for 5 ~ 7 seconds with power being switch all and no tapes, OK is displayed at FLD for FLD models and LED becomes on for LED CLOCK models. This is the state that initializing EEPROM is finished. (In case of PAL VCP if holding the REC button on the front panel and the MENU button on the remote control handset for 5 ~ 7 seconds with power being off and no tapes, All the LED DOTs become on. This is the state that initializing EEPROM is finished.) ·MP KEY's function : MP KEY sets EEPROM's data up to the initial state.
OK
REC VCR TIMER AM
· FLD MODEL: MP KEY "OK"
· LED CLOCK MODEL: MP KEY Switch all on a Light
· LED DOT MODEL: MP KEY Switch all on a Light
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SERVICE INFORMATION FOR EEPROM IC SETTING
EEPROM option code No. setting
NAME OPT1 OPT2 OPT3 OPT4 OPT5 OPT6 WR : OK I : EDIT : DE HEX 00 00 00 00 00 00 EXIT MOVE BINARY 00000000 00000000 00000000 00000000 00000000 00000000 :F G
EEPROM option code No. setting procedure
1. DETECT NEW EEPROM (OPTION EDIT SCREEN) - Eeprom EDIT screen automatically appears if replacing Eeprom. · Setup option data using the cursor Up/Down key of a remote control. (Setup upon BOM depending on OPT1~OPT6 model) · Since an initial remote control is set to LG for LG model, appropriately set optional data using the cursor Up/Down key. 2. EEPROM WRITED COMPLETE SCREEN - Writes data on EEPROM by using REMOCON "OK". - If completing the option data screen with a menu key, Powering Off is automatically done and the option edit screen is arranged. 3. PG ADJUST a) Insert the PAL SP Test Tape and play. Note - Adjust the distance of X, pressing the Tracking(+) or Tracking(-) when the "ATR" is blink after the PAL SP Test Tape is inserted. b) Press the Auto PG KEY on JIG Remocon(1'st) or Press "REC" key on set and "CLEAR" key on Remocon.(Then check the blink "TRK OK" on CLK/LED-TRK is a Initial) c) Press the Auto PG Key on JIG Remocon again (2'nd) or press "REC" key on set and "CLEAR" key on Remocon again.(Then check the blink "PG NG > PG OK" on CLK/LED.) 4. EEPROM INITIAL - SETUP is displayed in the field if pressing the FRONT REC KEY with the remocon number "CLEAR" key pressed in the status of powering Off. - AUTO SEARCH is done since the initial screen of ACMS is serviced if powering On. - Check basic operation (PLAY/RECORD...)
MASKROM : R00 EEPROM : R00
LG CODE
MODEL LV2378
NAME OPTION1 OPTION2 OPTION3 OPTION4 OPTION5 OPTION6 OPTION1 OPTION2 OPTION3 OPTION4 OPTION5 OPTION6 OPTION1 OPTION2 OPTION3 OPTION4 OPTION5 OPTION6 OPTION1 OPTION2 OPTION3 OPTION4 OPTION5 OPTION6 OPTION1 OPTION2 OPTION3 OPTION4 OPTION5 OPTION6 OPTION1 OPTION2 OPTION3 OPTION4 OPTION5 OPTION6
HEX 02 CA 80 F7 00 32 30 CA 80 F7 00 32 02 C8 C0 F7 00 32 2C C8 C0 F7 00 32 12 CA 80 F7 00 32 30 CA 80 F7 00 32
BINARY 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
LV2578
LV2288
LV2788
LV3798
OPTION1 OPTION2 OPTION3 OPTION4 OPTION5 OPTION6 OPTION1 OPTION2 OPTION3 OPTION4 OPTION5 OPTION6
3C CA 80 F7 00 32 BC CA 88 F7 00 32
00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
LV3398
LV3799
LV3598
WR : OK I : EXIT MOVE : F G EDIT : DE
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SPECIFICATIONS
General Power Power consumption Video Head system : 110~240V, 50~60Hz : Approx. 12 watts(Energy Saving mode : 3 watts) : Rotary 2heads, helical scanning system (2HD MODEL) Double azimuth 4 heads, helical scanning system (4HD Mono, 4HD Hi-Fi Model) : 23.39 mm/sec (SP mode)11.69 mm/sec(LP mode) : Tape width 1/2" (12.7 mm high density VHS tape) : 4 hours in SP mode/8 hours in LP mode (with E-240 tape) : Approx. 150 sec. (with E-180 tape) : 360 x 94.5 x 270 mm : 9.0 lbs. (4.0 kg) : 41°F-95°F (5°C-35°C) : Less than 80% : 24 hours display type
Tape speed Tape format Maximum recording time Rewind time Dimensions (W X H X D) Weight Operating temperature Operating humidity Timer Video Television system Recording format Input level Output level Signal to noise ratio Audio Input level
: CCIR standard (625 lines, 50 fields) PAL, SECAM colour signal : PAL (B/G, I/I), SECAM (D/K) : VIDEO IN (SCART, RCA type) 1.0 Vp-p, 75 ohm, unbalanced : VIDEO OUT (SCART type) 1.0 Vp-p, 75 ohm, unbalanced : More than 43 dBm
Output level
Audio track Audio signal to noise ratio Audio dynamic range
: AUDIO IN (SCART, RCA type) Scart type : -6.0dBm, more than 10k RCA type : -6.0 dBm, more than 47k : AUDIO OUT (SCART, RCA type) Scart type : -6.0dBm, less than 1k RCA type : -6.0 dBm, less than 1k Mono track & Hi-Fi track : Normal : More than 70 dBm(JIS A filter) : Hi-Fi audio : More than 85 dBm(JIS A filter)
· Design and specifications are subject to change without notice.
:Hi-Fi Model only
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SECTION 2 CABINET & MAIN CHASSIS
SERVICE METHOD
Electrical Part
(1) Re-assembly Flow for service like Fig. 2-1
Timer C.B.A
Main C.B.A
Housing & Deck Assembly
(2) To check and replace Electrical parts 2 Re-assemble the unit according to No.1) Re-assembly Flow. 3 Place the unit like Fig. 2-1 4 Check and replace Electrical parts. NOTE : 1 Insert Video Cassette Tape inversely like Fig. 2-1 to check and replace defective parts. 2 In disassembling and reassembling, be careful not to damaged CST switch.
(Positioned Upside Down) Main C.B.A
Cassette Tape (Upside Down) Housing & Deck Ass'y
Timer C.B.A
Fig.2-1
2-1
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EXPLODED VIEWS
1. Cabinet and Main Frame Section 5
NOTE) Refer to "SECTION 5 REPLACEMENT PARTS LIST" in order to look for the part number of each part. _ OPTIONAL PARTS
457
300
320
2SCART
1SCART
457
462
3
250
330
452
275
4
LED502(LED501)
1(TU NER )
TU70
323
260
A49
A46
283 284 280
462
2
457
A00
A42
1
281
A
B
2-2
C
277
A43
457
D
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2.Packing Accessory Section
NOTE) Refer to "SECTION REPLACEMENT PARTS LIST NOTE) in order to look for the part number of each part.
OPTIONAL PARTS 806 CABLE, COAXIAL
(Optional parts)
810
CABLE ASS'Y (R/F)
811
PLUG ASS'Y 1WAY
(Optional parts)
812
PLUG ASS'Y 2WAY
(Optional parts)
821
SCART CABLE
801 808 BATTERY
INSTRUCTION MANUAL
803
PACKING (LF)
804
BAG. SOFR SHEET
803
PACKING (RF)
802
BOX CARTON 900 REMOCON
2-3
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SECTION 3 ELECTRICAL
ELECTRICAL ADJUSTMENT POINTS ARRANGEMENT
: Measurement point : Adjustment point
SCART JACK Speak-ez SW/IC VPS SECAM Hi-Fi T U N E R
S M P S
A/V
Micom
AVCP
C+
W501 W502
H.S/W
SYSTEM
EEPROM CLK IC
E2PROM
NICAM
DISPLAY(DOT,CLK)
(COMPONENT SIDE)
3-1
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ELECTRICAL ADJUSTMENT PROCEDURES
1. Servo Adjustment
1) PG Adjustment
· Test Equipment a) OSCILLOSCOPE b) PAL TEST TAPE (VHS SP) c) JIG REMOCON (AUTO PG SETTING)
· Adjustment And Specification MODE
PLAY
MEASUREMENT POINT
V.Out H/SW(W501, W502)
ADJUSTMENT POINT
SPECIFICATION
6.5 ± 0.5H
· Adjustment Procedure
a) Insert the PAL SP Test Tape and play. Note - Adjust the distance of X, pressing the Tracking(+) or Tracking(-) when the "ATR" is blink after the PAL SP Test Tape is inserted. b) Press the Auto PG KEY on JIG Remocon(1'st) or Press "REC" key on set and "CLEAR" key on Remocon.(Then check the blink "TRK OK" on CLK/LED-TRK is a Initial) c) Press the Auto PG Key on JIG Remocon again (2'nd) or press "REC" key on set and "CLEAR" key on Remocon again.(Then check the blink "PG NG > PG OK" on CLK/LED.)
· Check the PG
a) Connect the CH1 of the oscilloscope to the H/SW and CH2 to the Video out for the VCR. b) Trigger the mixed Video Signal of CH2 to the CH1 H/SW(W501, W502), and then check the distance (time difference), which is from the selected A(B) Head point of the H/SW(W501, W502) signal to the starting point of the vertical synchronized signal, to 6.5H ± 0.5H (416µs, 1H=64.0µs).
· CONNECTION
V.Out
OSCILLOSCOPE CH1 CH2 H/SW(W501,W502)
H/SW V.out (W501, W502)
3-2
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ELECTRICAL ADJUSTMENT PROCEDURES
· WAVEFORM
H/SW 6.5H(416us)
Composite VIDEO
· Attension and Reference
a) The PG checking must do when RF Level is Maximum and SERVO system is Locking (MTR MODE) b) V.H/SW Level is 2Vpp.
3-3
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ELECTRICAL TROUBLESHOOTING GUIDE
1. Power Circuit(SMPS) (1) No 5.3VA.
No 5.3VA. YES Is the F101 normal? YES Is the BD101 normal? YES Is the R101 normal? YES Does the oscillation waveform appear at the IC101 Pin 7? YES NO Is Vcc(about 13~15V) permittable at the IC101 Pin 3? NO Check or Replace the D103. NO Replace the R101. NO Replace the BD101. NO Replace the F101 (Use the same Fuse).
Is there DC voltage at the IC101 Pin 4? YES Is there about 2.5V at the IC103 Vref ? YES Is the D106 normal? YES Check the Main PCB 5.3VA Line short?
NO
Replace the IC102.
NO
Replace the IC103.
NO
Replace the D106.
3-4
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7. Power Circuit(SMPS) (2) No 12VA.(Capstan)
No 12VA. YES Does 5.3VA work normally? YES Is the D109 normal? YES Check 12VA Line of the Main PCB short. NO Replace the D109. NO Check whether 5.3VA is out of order.
(3) No 12VA (CANAL, Buffer)
No 12VA. YES Is Vcc(about 13VA) put into the Q155(E)? YES Is Voltage(about 12V) put into the Q155(C)? YES Check or Replace the Q155. NO Replace the Peripheral Circuitry of D160.
3-5
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7. Power Circuit(SMPS) (4) No 5VT(5V)
No 5VT.(5V) YES Is 5.3VA put into the Q152(Q151) collector? YES Is the Q163(Q162) Base "H"? YES Is about 4.7V put into the Q152(Q151) Base? YES Check or Replace the Q152(Q151). NO Check the Q163(Q162) whether it works normally. NO Check the µ-com Control.
3-6
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2. Servo Circuit
A. Unstable Video in PB Mode.
Does the on screen noise level change periodically?
YES
Do CTL pulses appear at IC501 pin 8?
YES NO
Does the CFG divide waveform appear at IC501 pin 9?
YES
Is the height of the CTL Head adjusted correctly?
NO
Do the CTL pulses move when TRK is operated?
YES NO
Adjust the CTL Head.
Does the Video Envelope waveform appear at IC501 Pin 24?
YES NO
Replace IC501.
Replace IC501.
Check AVCP IC.
3-7
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B.
Drum Motor stopped.
Does 12V appear at PMC01 Pin 8?
YES NO
Does 2.8V appear at PMD01 Pin 12?
NO
Check Power.
Check Connector and Drum Motor Ass'y.
Does Drum PWM appear at IC501 Pin 107?
NO
YES
Check the Components and foil Pattern between IC501 Pin 26 and PMC01 Pin 12 for shorts.
YES
Do DFG Pulses appear at PMD01 Pin 3?
NO
Do DFG Pulses appear at IC501 Pin 104?
YES NO
Check Drum Monitor Ass'y.
Does the Drum PWM waveform appear at IC501 Pin 107?
YES NO
Check the Components and foil pattern between PMC01 Pin 11 and IC501 Pin 104 for shorts.
Check the Components and foil Pattern Connected to IC501 Pin 107 PMC01 Pin 12 for shorts.
Replace IC501.
3-8
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C. Capstan Motor Stopped.
Does 13VA appear at PMC01 Pin 2?
YES NO
Does 2.8V appear at PMC01 Pin 9?
YES NO
Check Power.
Check Connector and Capstan Motor Ass'y.
YES
Does PWM wave appear at IC501 Pin 108?
NO
Check the Components and foil Patterns Connected between IC501 Pin 108 and PMC01 Pin 9 for shorts.
YES
Does the CFG signal appear at PMC01 Pin 1?
NO
Does the CFG signal appear at IC501 Pin 9?
YES NO
Check Capstan Motor Ass'y.
Does Capstan PWM appear at IC501 Pin 108?
YES NO
Check Components and foil patterns between PMC01 Pin 7 and IC501 Pin 9 for shorts.
Check the components and foil pattern connected between IC501 Pin 108 and PMC01 Pin 9 for shorts
Replace IC501.
3-9
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3. System & Front Panel Circuit
A. Auto stop.
Does SW30 waveform appear at IC501 Pin 105?
YES NO
Do Take-up reel pulses appear at IC501 Pin 49?
YES NO
Check the Drum Motor Signal.
Change IC501.
YES
Do Take-up reel pulses appear at the base of Q514?
NO
Does 5.3V appear at RS501.
YES NO
Replace the Take-Up Reel Photocoupler in the Deck(RS501).
Check the Power.
3-10
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B. Cassette tape loading is unstable.
Is REG 14VA applied to PMC01 Pin 8?
YES NO
Is High signal applied to IC501 Pin 30 when inserting the CST?
NO
Check the power.
Is 5.4VA applied to R544?
YES YES NO
Does Low signal occur form PMC01 Pin 10 when inserting the CST?
YES NO
Check the CST SW and peripheral circuitry.
Check the power.
Check the Deck Mechanism.
Check IC501 Pins 68, 69, 70, 71.
NOTE : Auto stop may also be caused by lack of lubrication,due to dried grease or oil. C. Non working finction buttons.
Is the voltage of IC501 Pin 36, 5V?
YES NO
Does(LED Ass'y) display change when a function button is pressed?
YES NO
Check the power.
Replace IC501.
Check IC506 Pins 6~14, 17, Pins 20~23 pulse output.
Replace the defective switch.
Replace IC506.
3-11
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4. Y/C CIRCUIT (1) No Video in EE Mode,
No Video in EE Mode
Does the Video signal appear at the IC301 Pin 48? YES
NO
Check the Video Input Jack. (Line In Jack)
NO Is 5V applied to the IC301 Pins 18, 24, 42, 55, 72, 91?
YES Does the Video signal appear at the IC301 Pin 65? YES Does the Video signal appear at the IC501 Pin 19? YES Does the Video signal NO appear at the Emitter terminal of the Q307, Q308?
Check the 5.2VT, 5.4VA Line. (Power Circuit)
NO
Is I2C BUS signal applied to the IC301 Pins 68, 69? YES
NO
Check the System Circuit. (Refer to `SYSTEM I2C BUS CHECK Trouble Shooting')
NO
Chck the path of the signal between the IC301 Pin 5 and IC501 Pin 17.
Check C316. (AGC) YES
Does the 12VT, 5.4VA NO appear at the Emitter terminal of the Q307, Q308. YES Replace the Q307, Q308.
Replace the IC301.
Check the 12VT, 5.4VA Line. (Power Circuit)
3-12
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3. Y/C CIRCUIT (2) When the Y(Luminance) signal doesn't appear on the screen in PB Mode,
Is 5.2VT, 5.4VA applied to the IC301 Pins 24, 42, 55, 72, 91? YES Is the I2C Bus siganl applied NO to the IC301 Pins 68, 69 ? YES NO Does the normal RF signal appear at the IC301 Pin 78? NO Is the V.H.S/W signal applied to the IC301 Pin 70? YES Is V.H.S/W "H" about 3.4V at the IC301 Pin 70? YES YES NO NO Check the V.H.S/W level. (Check R303, R304) Check the System Circuit. (IC501 Pin 105) Refer to `SYSTEM I2C BUS CHECK Trouble Shooting'. NO Check the line of the 5.2V Line. (Power Circuit)
Clean the Drum.
Replace the IC301.
Does the Y(Luminance) RF NO signal appear at the IC301 Pin 76? YES Is the Y(Luminance) Video waveform showed up at theIC301 Pin 43? YES Replace the IC301. NO
Check the path of the Y(Luminance) RF signal. (Check the C312)
YES
Check the path of the Y(Luminance) RF signal. (Check C327)
YES
3-13
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3. Y/C CIRCUIT (3) When the C(Color) signal doesn't appear on the screen in PB Mode,
Is 5.2VT/5.4VA applied to the IC301 Pins 24, 42, 55, 72, 91. YES Is the Color Rotary signal applied to the IC301 Pin 70? YES Is Color Rotary "H" about 3.4V? YES Does the Color signal appear at the IC301 Pin 25 ? NO Does the X301(4.43MHZ) oscillate? NO Replace the X301. NO Check the Color Rotary level. (Check the R303) NO Check the Color Rotary Circuit. (IC501 pin 99 ) NO Check the line of the 5.2VT/ 5.4VA Line. (Power Circuit)
YES
NO Does the Color signal appear at the IC301 Pin 21? YES
Check the Color Pass.
Replace the IC301.
Replace the IC301.
3-14
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3. Y/C CIRCUIT (4) When the Video signal doesn't appear on the screen in REC Mode,
NO
Is the EE signal normal? YES Is 5.2VT/5.4VA applied to the IC301 Pins 24,42,55,72,91? YES Does PB Mdoe operate normally? YES Does the RF signal appear at the IC301 Pin 78?
Check EE Mode.
NO
Check the line of the 5.2VT/ 5.4VA Line.(Power Circuit)
NO
Check PB Mode.
NO
Is the REC `H' signal (about 4V) applied to the IC301 Pin 80? YES
NO
Check the System of REC `H'. (the IC501 Pin 47 / the D301)
YES
Check REC Luminance Pass & Color Pass.
YES
Replace the IC301.
Does the REC RF signal appear at the IC301 Pins 88,89,94,95? YES Check the Drum & Drum Connector
NO
Check the circuit of the IC301 Pins 85, 86.
YES
3-15
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5. Tuner/IF circuit (1) No picture on the TV screen
No picture on the TV screen YES Does the Video signal at the TU701 Pin24? YES NO Is +30VT applied to TU701 Pin 16? YES Is +5VT applied to TU701 Pin 13? YES Does the Clock signal appear at TU701 Pin 11? YES Does the data signal appear at TU701 Pin 12? YES NO Check the liC Data signal of µ-com Pin 60. NO Check the liC Clock signal of µ-com Pin 59. NO Check 5VT line. NO
Check 33VT line.
Replace Tuner
Does Sync appear at IC501 Pin111? YES Check the signal flow from IC501 Pin19 to JK901 Pin19.
NO
Check the signal flow from TU701 Pin 24 to IC301 Pin 67.
3-16
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(2) No sound (Mono Model)
No sound YES Check the Vcc of IC301 Pin 18. YES Check the Tuner Audio signal at IC301 Pin 13. YES Check the Audio signal at IC301 Pin 11. YES Check the signal flow from IC301 pin 11 to IC901 Pin 6. NO Replace IC301. NO Chekc the signal flow from TU701 Pin21 to IC301 Pin 13. NO Check 5VT power.
3-17
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(3) No sound (Hi-Fi Model)
No sound YES Check the Vcc of IC751 Pins 1, 19, 33. YES Check the Tuner SiF signal at IC751 Pin 2. YES Check the oscillator of IC751 Pins 5, 6. YES Check the Audio of IC751 Pins 30, 31. YES Check the Audio of IC801 Pins 2, 3. YES Check the Audio of IC801 Pins 18, 19. YES Check the signal flow from IC801 pins 18, 19 to JK901 Pins 1, 3. NO Check the IIC Clock and Data at IC801 Pins 42, 43. NO Check the signal flow from IC751 Pins 30, 31 to IC801 Pins 2,3. NO Check the IIC Clock and Data at IC751 Pins 12, 13. NO Replace X751. NO Check the Tuner Audio of TU701 Pin 21. NO Check 5V power.
3-18
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6. Hi-Fi Circuit (Hi-Fi Model)
A. Hi-Fi Playback.
YES
No sound
Check the Vcc of IC801.(Pins 34, 40)
NO YES
Check the Hi-Fi Selection Switch and the Tape quality.
YES
Check power.
Is the RF Envelope at IC801 Pin 44 over 2Vp-p?
YES
NO
Is the Head switching signal IC802 Pin 41 O.K?
YES
NO
Check IC501 Pin 23. (Audio head switch 25)
Check IC801 Pin 42(Data), Pin 43(Clock).
YES NO
Check the connection at P3D01 if good then Replace IC801.
Do Audio signals appear at IC801 Pin 16(L-CH), 17(R-CH)?
YES NO
Check Ports of µ-COM.
Check the Signal path of Audio Output.
Replace IC801.
3-19
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B. Hi-Fi REC.
It is impossible to record and playback Hi-Fi Audio signal.
YES
Check Vcc of IC801. (Pins 34,40)
YES NO
Check IC801 Pin 42(Data),Pin 43(CLOCK).
YES NO
Check Power.
Do Audio signals appear at IC801 Pins 16, 17?
YES NO
Check ports of µ-COM.
Do FM Audio signals appear at IC801 Pin 36?
YES NO
Check Audio input signal of IC801 Pins 2, 3(TU.A.), 6, 7(Scart 1)
Check the Contact Points of Drum Connector if good then Replace the Drum.
Replace IC801.
3-20
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BLOCK DIAGRAMS
1. Power Block Diagram
BD101 ! 4 2 3 1
R101
T101 ! TRANSFORMER
Q155
SNUBBER BLOCK +
C103
(D102,R104, C105,C106)
6
7
RECTIFIER & SMOOTHING
(D109, C120, L104,C121)
TO Canal+ 12VA
8
4 9
RECTIFIER & SMOOTHING
(D110, C123) 24V S/W Q159,R166,R167
Q161 R163
F. µ-com SEARCH "H"
R106 R102
DRIVE & S/W BLOCK OVER CURRENT LIMIT BLOCK
(IC101, R109, C135, D103, R103,C109, R125, R126)
TO CAPSTAN M 24/12VA D155 TO DRUM 12VA
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(C101,L102, C102)
3
(D106, C116, L103,C117) 11
TO TU/IF 33V TO SYS, TU/IF 5.4VA
!
2 F101 12 1 4
RECTIFIER & SMOOTHING
(D105, C115)
! !
C113 C112
36V S/W BLOCK
(Q154, R157, R158,R155)
HOT GND
5VT SW BLOCK
(Q152, R153, R154, D156)
TO AV, TU/IF,
5.2VT
!
3 IC102
FEED-BACK BLOCK !
2 (R116,R117,R118 R119,R120,R121 C114) IC103
5V S/W BLOCK
(Q151, R151, R152)
TO Hi-Fi, Sensor SECAM 5.2V
BK WH (BR) (BL) PW101
!
HOT CIRCUIT
PWR CTL BLOCK
(Q162, R161)
FROM µ-COM P.CTL"H"
Q163
TIMER "H" FROM µ-COM
'00 11. 30
NOTES :
Symbol denotes AC ground. Symbol denotes DC chassis ground.
3-21
3-22
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LINE FILTER BLOCK
10
RECTIFIER & SMOOTHING
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5.2VT
60
59
93
94
(From Power)
143
396
S.V.W
144
875
146
141
5.4VA
2. Tu/IF, NICAM & A2 Block Diagram
144
27 731
3. VPS Block Diagram
141 5.2VA
14
VSUP
358 VPS V.out
Iref
PD1
VC01
CVBS
PD2/ VC02
GND
SCL
SDA
CSO
1
59 CLK 60 DATA 55 DAV
2
3
4
VCS
3-23 3-24
13
12
11 10
9
8
T1
VPS BLOCK
IC7V1
SDA5650
DATA/SYNV SLICER CLOCK PLL
DATA AQUISITION
IIC BUS INTERFACE
TIMING DA VIN EHB
5
6
7
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4. Y/C Block Diagram
(PB MODE)
5. Hi-Fi Block Diagram(Hi-Fi Model Only)
C.ROTARY DATA
S2 V.OUT
S1 V.OUT
V.OUT (MICOM)
C.SYNC
V.H.SW
CLOCK
79
78
70
69
68
67
65 60dB AMP
63
61
PB FM AGC
SUB LPF
MAIN DE EMP Y-LPF
Y/C MIX
PB FM EQ V.ENV 84
FM OEM 46
YNR
87
IC301 LA71750M
Y-Delay
43
90
93
96
ACC DET
CCD LPF
CNC
29
IC201 LA70100M
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21 22
SYNC IN
33 32 31 30 29 28 27 26 25 24 23
C LPF
ACC
MAIN CONV
BPF
C-Delay (1H/2H)
Hi-Fi PNR Block
21
25
18
14
(REC MODE)
C.ROTARY
V.H.SW
CLOCK
REC'H'
DATA
C SYNC
V.IN4 FRONT V.IN3 DEC
V.OUT MICOM
A
80
79
78
76
75
70
69
68
67
65
59
58
54
52
29
16
IC201 LA70100M
AGC W/D CLIP 88 UP REC (To Drum) 89 94 (To Drum) SP REC 95 YNR Y-DELAY BPF REC FM EQ DETAIL ENH Y-LPF FBC
48
V.IN1 TUNER
46 43
IC301 LA71750M
Killer C-LPF Main Conv
ACC
KILL DEC REC APC VX02 21 27 28
33 32 VX02 31 29 CLK-IN 4.43MHz
3-25
3-26
Normal A.IN (From AVCP)
Normal A.out (To AVCP)
Main Conv
COMP AMP
Audio input Block
1H/2H DELAY
· Tuner · F.A/V · Scart1 · Scart2
1 2 3 4 5 6 7 8 9 10
W/D CLIP
NL EMPHA
SW
50
V.IN2 S1
2
12
B
13
Modulator A.out (To Tuner)
Scart 1 Audio Out
16 17
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37 36 35
IC801
Hi-Fi REC Block
Scart 2 Audio Out
19 20
6. System Block Diagram
LD(+) LD(-)
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L/M CONTROL R525, R526
RC501
RC501, R5R7 R5R7, R5R8 C5R, C5R2
2fsc R524, R514, R518, R516, R589, C577, C576, L501, Q504
3-27
3-28
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IC501 HD6432197A
CIRCUIT DIAGRAMS
1. Power Circuit Diagram
D109, C120 are defective. No 14VA, 12VA are 12VT.
Power dead. BD101, R101 are defective. No power. D102 is defective.
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No 5.3VA and 5VG, 5VT. D106 is defective. No 5.2VT. Q152 is defective.
Power dead. F101 is defective.
Switching dead. IC101 is defective.
Power dead. IC102, IC103 are defective.
'03. 1. 7 R15000A
NOTES) NOTES) Symbol denotes AC ground. Symbol denotes DC chassis ground. NOTE) NOTE) NOTE) NOTE) Warning Parts that are shaded are critical With respect to risk of fire or electricial shock.
NOTE : 1. Shaded( ) parts are critical for safety. Replace only with specified part number. 2. Voltages are DC-measured with a digital voltmeter during TUNER mode.
3-29
3-30
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2. Tuner, NICAM Circuit Diagram
FROM POWER
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F.A/V -
F/To Hi-Fi F.A/V -
F. SYS
To A/V To Hi-Fi
'03. 1. 7 R15004A
EE MODE(VIDEO) TU MODE (AUDIO)
3-31
3-32
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5. Hi-Fi, SCART Circuit Diagram
IC801 42, 43 Pins are defective. All Audio is not appear.
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PB Hi-Fi NORMAL Audio
V.OUT V.IN
3-39
3-40
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· CIRCUIT VOLTAGE CHART
MODE PIN NO. R A K 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 9 10 EE PB REC MODE PIN NO. 11 2.44 0 4.07 2.52 2.41 3.37 0 0 0 0 0 3.04 0 2.19 3.25 4.01 2.56 3.06 3.22 0.22 0.13 2.22 2.06 2.28 0 5.06 5.06 2.37 2.38 2.11 0.18 0.41 2.11 0 5.21 2.19 0 2.91 0 2.92 0 0 2.85 0 5.29 4.94 5.29 5.29 2.57 0 5.29 12 13 14 15 16 17 18 31 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 2.26 5.17 2.26 5.17 4.24 0 3.36 3.07 3.06 5.16 0.13 1.44 2.07 4.23 2.83 0 4.7 4.7 2.85 0.33 2.17 3.35 2.09 1.99 9.45 0 0 5.17 2.4 2.34 2.33 2.69 2.28 2.29 2.28 2.27 2.26 2.29 2.37 0 2.26 EE 2.41 2.1 0 5.26 0 0 0 0 5.15 0.02 2.29 PB 2.41 2.1 5..29 5.26 0 0 0 0 5.14 0.03 2.29 1.46 2.26 2.28 2.28 2.27 2.26 2.29 2.39 0.02 2.3 0.02 2.26 0.16 2.26 5.17 4.25 0 1.96 3.06 3.03 5.16 3.44 1.82 2.1 4.21 2.83 0 4.7 4.7 2.06 0.31 2.16 3.35 2.11 2.03 9.43 0 0 5.16 2.42 4.42 2.46 2.67 2.29 5.05 2.27 5.14 3.07 0 3.25 3.06 3.05 5.13 5.13 0 1.42 4.18 2.9 0 4.69 4.69 2.07 0.31 2.16 3.35 2.09 2.02 9.39 0 0 5.14 2.39 0.08 2.46 2.68 REC 2.42 2.08 5.29 5.25 0 0 0 0 1.7 0.75 0 0.5 2.47 2.29 2.27 2.27 3.05 2.28 2.28 0.11 2.28 MODE PIN NO. 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 0 0.71 0.71 0.71 5.17 0 1.95 1.95 1.95 1.95 0 2.29 0 2.29 2.55 2.46 2.47 1.59 2.7 2.02 1.06 1.11 0 5.13 0.46 0 EE 4.17 2.35 3.18 1.97 0 1.97 2.34 1.97 5.24 2.25 2.02 2.37 2.94 1.42 1.72 0.09 1.75 0 1.85 0 0. 4.79 4.75 5.27 0.01 5.13 2.95 1.55 1.85 0.11 1.84 0 1.85 0 0.44 4.91 4.81 2.69 0 5.11 1.98 2.63 2.63 0.77 1.59 3.39 1.91 1.06 1.12 0 1.47 2.43 0 0 0.72 0.72 0.72 0.72 5.16 0 1.93 1.93 1.93 1.93 0 2.29 2.29 2.29 0. 1.81 0 0.4 4.81 4.79 2.69 0.01 5.09 2.21 2.53 2.45 2.45 1.49 2.69 2.52 4.72 1.11 0 1.51 1.75 1.36 2.03 0.7 0.7 0.7 0.7 5.11 0 0.73 0.72 0.72 4.33 0 2.4 2.4 2.53 PB 4.17 2.37 3.18 1.97 0 1.97 2.35 1.99 5.24 2.31 2.14 REC 4.17 2.33 3.18 1.97 0 1.97 2.35 1.99 5.24 2.29 1.99 2.4 2.93 1.38 2.05 0.11 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 MODE PIN NO. EE PB REC MODE PIN NO. 55 0 2.57 3.04 2.1 2.57 2.57 2.58 2.55 2.31 5.016 1.9 1.89 2.49 0.4 0.56 1.98 2.31 5.11 2.33 0 0 0 0 0.01 2.8 5.28 2.54 5.28 5.27 0.05 1.9 0.18 0.3 5.28 5.29 4.94 4.88 2.29 0 0 0 4.88 5.25 0 0 0 0 5.28 0 0.04 5.29 0 5.26 0 0.02 5.29 0 5.27 0.18 0.43 5.28 5.28 4.94 4.87 2.28 0 0 0 4.87 5.24 0 0 0 0 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 EE 5.27 5.27 0 0 4.91 4.91 5.17 5.17 2.84 5.14 0.01 5.1 0.83 0.01 0.01 5.29 5.29 0.03 5.24 0 1.49 1.3 5.27 2.55 0 5.29 3.25 5.28 0 0 0 2.65 0 0 0 0 0 0.95 0 0 0.29 0 0 5.26 0 0.01 0.7 0 0.12 0.12 0 0 0 0 0.05 PB 5.29 5.28 0 0 4.92 4.91 5.18 5.19 2.83 5.14 0.01 5.11 0.83 5.3 5.3 5.3 0 0.03 5.23 0 1.5 1.4 5.27 2.53 0 2.58 3.25 5.28 2.7 2.77 3.55 2.68 3.3 0 0 0 0 5.16 0 0 0.1 0 0 5.26 2.7 0 0.13 0 1.39 1.39 2.7 2.64 2.75 2.78 0.05 0 0 0.07 0 0 5.25 0 0 0.57 0 1.39 1.39 0 5.12 2.74 2.77 0.05 1 2 3 4 5 6 7 8 9 REC 0.08 5.28 0 0 4.79 4.79 5.18 5.18 2.86 5.15 0.02 5.11 0.89 5.3 5.3 5.3 0.01 0.04 5.22 0 1.5 1.21 5.27 2.54 0 2.58 3.25 5.28 2.69 2.77 3.55 2.86 3.21 0 0 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 1 2 3 1 2 3 1 2 3 4 5 6 7 8 MODE PIN NO. 110 111 112 EE 0 4.2 5.29 0 0 0 0 5.01 5.01 0 5.29 5.28 0 5.28 5.28 0 4.87 2.22 5.16 2.85 5.11 4.58 1.78 2.11 2.64 1.95 1.52 1.96 1.96 0.61 1.41 0.53 0.53 1.14 4.49 0 1.13 1.14 1.12 1.24 0 0 5.01 5.01 0 5.28 5.28 0 0 0.01 PB 0 0.4 5.28 0 0 0 0 4.95 4.95 0 5.29 5.28 0 5.28 5.28 0 4.87 2.12 5.15 2.86 5.11 4.38 2.15 2.14 2.62 2.04 1.62 2.27 1.79 0.59 1.38 0.48 0.48 1.13 4.41 0 1.15 1.13 1.13 1.25 0 0 4.94 4.94 0 5.28 5.28 0 0 0.01 2.66 0 2.31 REC 0 0.4 5.27 0 0 0 0 4.79 4.8 0 5.28 5.28 0 5.28 5.28 0 4.87 2.14 2.15 2.85 5.11 4.44 1.41 2.58 2.6 1.51 1.52 1.41 1.95 0.64 1.43 0.53 0.54 1.13 4.47 0 1.2 1.21 1.2 1.35 0 0 4.79 4.78 0 0.39 1 2 3 4 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 2.34 0.03 0.03 12.6 3.35 3.29 3.29 3.55 0 5.2 2.27 4.96 5.05 2.8 5.14 1.51 1.51 0 2.41 0.02 0.04 12.5 3.31 3.3 3.3 3.56 0 5.2 2.29 4.98 5.06 2.79 5.15 1.51 1.51 0 1.38 -0.07 -0.06 12.57 2.89 2.9 2.9 3.42 0.01 5.21 2.5 4.91 4.97 2.69 5.15 1.51 1.51 0 MODE PIN NO. 10 11 12 13 14 EE 0 0.01 1.56 0.99 5.28 2.84 2.92 2.91 2.82 2.8 2.8 2.79 2.78 2.79 2.79 2.77 2.76 2.71 2.49 2.48 2.64 2.64 1.48 2.63 2.6 2.57 2.66 2.63 2.5 2.52 2.36 0.01 2.51 2.6 PB 0 0 1.56 0.99 5.29 2.91 2.91 2.9 2.81 2.86 2..86 2.85 2.85 2.84 2.84 2.83 2.82 2.75 2.51 2.51 2.67 2.68 2.57 2.67 2.63 2.59 2.86 2.64 2.5 2.53 2.37 0 2.47 2.57 REC 2.36 2.31 1.56 1.39 5.28 2.7 2.81 2.81 2.68 2.67 2.66 2.65 2.65 2.66 2.66 2.65 2.64 2.59 2.33 2.49 2.5 2.32 2.5 2.5 2.47 2.55 2.51 2.39 2.4 2.27 0 2.41 2.46 2.32
IC103
2.45 -0.03 4.05 2.52 2.4 0 0 0 2.8 0 0 3.04 2.53 2.1 3.32 4.01 2.55 3.06 6.2 2.34 0.13 2.23 2.08 2.27 1.42 5.05 5.05 2.31 2.3 2.09 0.18 0.48 2.08 0 5.21 2.19 0 2.91 0 2.92 0 0 2.86 5.15 5.29 4.94 5.29 5.29 2.57 0 5.29 2.45 -0.03 4.06 2.52 2.41 3.35 2.59 0 3.72 0 0 3.02 2.51 2.08 1.96 4.01 2.54 1.94 3.2 4.25 3.44 2.21 2.22 2.4 1.43 5.02 5.02 2.07 2.02 2.08 0.19 0.26 2.07 0.01 5.2 2.2 0 2.91 0 2.92 0 0 2.86 5.16 5.29 4.94 5.29 5.2 2.57 0 5.29
IC501
0 2.39 2.57 2.57 2.57 2.56 2.58 2.55 4.62 4.85 1.89 1.89 2.61 0.4 0.08 1.99 2.39 5.14 2.41 0 2.47 2.46 0 0.51 2.81 5.27 2.46 5.27 5.22 0 0.17 0.12 0.18 0.31 5.27 5.28 4.93 4.88 2.29 0 0 0 4.88 5.24 0 0 0 0 0.01 5.25 4.48 5.28 0 5.25 0 2.57 2.57 2.57 2.57 2.57 2.59 2.55 2.31 5.16 1.91 1.9 2.5 0.4 0.1 1.91 2.34 5.14 2.37 0 2.47 2.46 0 2.47 2.88 2.28 2.5 5.28 5.27 5.01
IC503
IC201
IC801
IC301
IC504
IC505
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IC401
IC402
IC7V1
IC751
3-41
3-42
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IC506
MODE PIN NO. 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44
EE 2.47 2.47 0.54 0 0 0 5.16 4.91 4.9 2.58 2.58 2.41 0.53 0.54 5.13 0 0.53 5.16 0 0 0 0 0.05 0 0 2.8 2.79 0 5.16 4.2 0 2.8
PB 2.48 2.48 0.5 0 0 0 5.16 4.86 4.8 0.51 0.5 0.51 0.53 0.51 5.14 0 0.51 5.16 0.02 0.02 0 0.05 0.05 0 0 2.8 2.79 0.02 5.14 4.2 0 2.8
REC 2.48 2.48 0.46 0.45 0.45 0 5.16 4.79 4.79 0.57 0 0.57 0 0.58 5.14 0 0 5.16 0 0 0 0 0 0 2.8 2.8 2.79 0 5.15 4.21 0 2.8 0 0 0
Transistor Q151 Q152 Q154 Q155 Q157 Q159 Q161 Q162 Q163 Q164 Q165 Q166 Q301 Q302 Q303 Q304 Q305 Q306 Q307 Q308 Q309 Q501 Q502 Q503 Q504 Q5S1 Q514 Q515 Q906 Q901 Q7S1 Q902 Q903
EE 4.55 5.31 32.99 12.73 0.03 29.84 0.03 0.02 0.03 -0.03 14.06 4.4 0 5.18 0.01 0.01 2.01 5.14 2.69 2.66 3.09 0 0 5.3 0 0.43 0 0 0 0 0 12.73 0
EE Mode PB 5.3 4.52 32.34 13.4 0.84 29.78 0 0.69 5.18 4.38 -0.01 5.3 0.01 5.18 -0.42 -0.4 1.29 5.19 1.98 1.98 2.41 0.67 0.71 4.61 0.14 0 5.09 0 0.12 5.26 0 0.01 0
REC 5.24 5.22 32.97 14.05 4.38 13.21 29.82 0 0.03 -0.01 14.04 5.11 5.15 -0.42 0 0 0 5.19 0 0 0 0.01 0.01 5.28 2.69 1.61 0.01 5.16 1.93 0.01 1.32 12.73 12.72
EE 5.34 5.31 33.53 12.68 0.03 29.79 0.03 -0.02 0.03 -0.03 13.74 5.3 0 5.18 0 0 2.53 5.19 2.69 2.63 3.05 0 0 5.3 0.05 2.22 0 0 0 0 0 12.66 0
PB Mode PB 4.54 4.52 32.89 13.35 0.84 29.8 0 0.69 5.18 4.38 -0.01 4.41 0 4.52 0.69 0.71 1.83 5.16 1.98 1.96 2.37 0.67 0.22 4.61 0.63 0
REC 5.24 5.22 33.5 13.77 4.38 12.48 29.8 0 0.03 -0.01 13.71 5.13 5.15 5.12 0.01 0 0 5.19 0 0 0 0.01 2.33 5.28 2.65 2.53
EE 5.3 5.3 33.76 12.76 -0.03 30.14 -0.03 -0.02 -0.03 -0.03 13.95 5.3 0 5.14 -18.22 -18.22 2.5 1.9 2.64 2.6 3.01 0 0 5.3 0.05 1.92 0 0
REC Mode PB 4.55 4.51 33.12 13.42 0.84 30.13 0 0.69 5.18 4.38 -0.01 4.4 0.75 5.13 -24.85 -24.7 1.81 2.14 1.93 1.93 2.33 0.67 0.23 4.61 0.67 0
REC 5.24 5.22 33.72 13.98 4.38 12.73 30.11 0 0.03 0 13.95 5.1 1.69 -24.71 0.01 0 0 4.89 0 0 0.01 2.29 5.28 2.67 2.5 0
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0.07 5.25 0 0.01 0
2.37 0.01 12.66 12.64
0 0 0 12.72 0
0.13 5.25 0 0.01 0
2.4 0.01 0.98 12.71 12.71
2.84 2.85 2.59 2.31 3.3
2.84 2.83 2.59 2.31
2.79 2.79 2.59 2.3 0
3-43
3-44
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PRINTED CIRCUIT BOARD DIAGRAMS
1. MAIN P.C.Board
NOTES) NOTES) NOTES) NOTES)
Warning Parts that are shaded are critical With respect to risk of fire or electricial shock.
LOCATION GUIDE
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(Solder Side)
3-45
3-46
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2. KEY (LEFT) P.C.Board
(LV3398/LV3598/LV3798/LV3799)
LOCATION GUIDE
LOCATION GUIDE
(LV2578)
(Solder Side)
(Solder Side)
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3-47
3-48
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MEMO MEMO
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3. A/V, SECAM, VPS Circuit Diagram
WAVEFORM & VOLTAGE SHEET
_ IC301 Oscilloscope Waveform
IC301 Pin70 is defective. PB COLOR Signal disappear.
Q305 is defective. EE, PB Screen doesn't appear.
D301or IC301 Pin 80 REC is defective.
IC301 Pin 20 PB mode 500mvp-p
9 1 3 6 2 2 2
IC301 Pins 38,32,31 38, 38 Video in 1Vp-p
IC301 Pin 28 PB/REC mode 4.0Vp-p
IC301 Pin 7 REC mode 1.1Vp-p
IC301 Pin 84 is defective. Audio Tracking is failed.
14 10 7
IC301 Pin 6 REC mode 2.0Vp-p
IC301 Pin 29 PB mode 2.02Vp-p
IC301 Pin 41 PB mode 400mVp-p
IC301 Pin 64 PB mode 400mVp-p
IC301 Pin 69, 68 are defective. PB and Recording is failed. (IC301 doesn't operate.)
IC301 Pin 23 PB/REC mode 5Vp-p
IC301 Pin 24 PB/REC mode 5Vp-p
IC301 Pins 71 72 REC mode 340mVp-p
IC301 Pins 51 54 PB mode 300mVp-p
F/To SYS
4
5 11 12 8 13
IC301 Pin 63 PB mode 400mVp-p
IC301 Pin 11 PB mode 3.6Vp-p
IC301 is defective. PB COLOR Signal disappear.
Q302, Q303, Q314 are defective. No mono Audio Signal in PB MODE.
PB Y+C PB Y PB C PB SECAM COLOR REC Y+C REC Y REC C REC SECAM COLOR REC AUDIO PB AUDIO(MONO)
FL301, Q301, Q306 are defective. Normal Audio signal is not recorded.
'03. 1. 7 R15002A
WAVEFORM
3-33
3-34
3-35
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* IC501 Waveform Photographs
4. System Circuit Diagram
Reset is defective. Set dead. IC504 is defective.
LED CLOCK MODEL ONLY
V.HSW (IC501 Pin 105) 1V/10mS REC/PB MODE
DV.SYNC (IC501 PIN 109) 1V/100uS QUE/REV MODE
CTL(+) (IC501 Pin 3) 1V/10mS
CTL(-) (IC501 Pin4) 1V/10mS
CLOCK SETTING will not operate. X501 is defective.
µ-COM will not operate. X502 is defective.
DFG/FG (IC501 PIN 103,104) 1V/10mS REC/PB MODE
CFG (IC501 Pin9) 1V/10mS
V.IN (IC501 Pin 17) 500mV/20uS
V.OUT (IC501 Pin 19) 500mV/20uS EE/PB MODE
5 5 1 2
C.SYNC (IC501 Pin 111) 1.0V/100uS EE/PB MODE
LED DOT MODEL ONLY
9 3 4 6 7 8
Remote control's Pulse will not received. RC501 is defective. Deck will not operate. R575, R576, R577, R578 are defective. VCR will not operate. IC505 is defective.
Auto stop occures. RS501,RS502,Q514, Q515 are defective.
'03. 1. 7 R15001A
Auto Rew will not working. ES501, ES502, LD501 are defective. µ-COM is unstable. Q501, Q503 are defective.
WAVEFORM
3-36
3-37
3-38
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SECTION 4 MECHANISM
CONTENTS
DECK MECHANISM PARTS LOCATIONS
· Top View......................................................4-1 · Bottom View ...............................................4-1
DECK MECHANISM ADJUSTMENT
· Tools and Fixtures for Service ...............4-12 1. Mechanism Alignment Position Check....4-13 2. Preparation for Adjustment......................4-14 3. Checking Torque .....................................4-14 4. Guide Roller Height Adjustment..............4-15 4-1. Preliminary Adjustment ....................4-15 4-2. Precise Adjustment ..........................4-15 5. Audio/Control (A/C) Head Adjustment ....4-16 5-1. Preliminary Adjustment ....................4-16 5-2. Confirmation of Tape Path between Pinch Roller and Take-up Guide .....4-17 5-3. Precise Adjustment(Azimuth Adjustment) .........................................................4-17 6. X-Value Adjustment .................................4-17 7. Adjustment after Replacing Drum Assembly (Video Heads) .........................................4-18 8. Check the Tape Travel after Reassembling Deck Mechanism.....................................4-18 8-1. Checking Audio and RF Locking Time during Playback after CUE or REV .........................................................4-18 8-2. Checking for Tape Curling or Jamming ..........................................4-18
DECK MECHANISM DISASSEMBLY
1. Drum Assembly .........................................4-2 2. Plate Top ...................................................4-4 3. Holder Assembly CST ...............................4-4 4. Opener Door .............................................4-4 5. Bracket Assembly L/D Motor.....................4-4 6. Gear Assembly Rack F/L ..........................4-4 7. Arm Assembly F/L .....................................4-4 8. Lever Assembly S/W .................................4-4 9. Arm Assembly Cleaner..............................4-5 10.Head F/E ...................................................4-5 11. Base Assembly A/C Head .........................4-5 12.Brake Assembly T .....................................4-6 13.Brake Assembly RS ..................................4-6 14.Arm Assembly Tension..............................4-6 15.Reel S / Reel T..........................................4-6 16.Base Assembly P4 ....................................4-7 17.Opener Lid ................................................4-7 18.Arm Assembly Pinch .................................4-7 19.Lever T/up / Arm T/up ...............................4-7 20.Belt Capstan/Motor Capstan .....................4-8 21.Lever F/R ..................................................4-8 22.Clutch Assembly D35 ................................4-8 23. Brake Assembly Capstan .........................4-8 24.Gear Drive/Gear Cam ...............................4-9 25.Gear Sector...............................................4-9 26.Plate Slider................................................4-9 27.Lever Tension ............................................4-9 28.Lever Spring..............................................4-9 29.Gear Assembly P2/ Gear Assembly P3 ..................................4-10 30.Base Assembly P2/ Base Assembly P3 ..................................4-10 31.Base Loading ..........................................4-11 32.Base Tension ...........................................4-11 33.Arm Assembly Idler .................................4-11
MAINTENANCE/INSPECTION PROCEDURE
Check before starting Repairs ................4-19 Required Maintenance ............................4-20 Scheduled Maintenance..........................4-20 Supplies Required for Inspection and Maintenance............................................4-20 5. Maintenance Procedure ..........................4-20 5-1. Cleaning...........................................4-20 5-2. Greasing ..........................................4-21 1. 2. 3. 4.
MECHANISM TROUBLESHOOTING GUIDE
1. Deck Mechanism.....................................4-23 2. Front Loading Mechanism.......................4-26
EXPLODED VIEWS
1. Front Loading Mechanism Section .........4-28 2. Moving Mechanism Section (1)...............4-29 3. Moving Mechanism Section (2)...............4-30
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DECK MECHANISM PARTS LOCATIONS
· Top View
Procedure Starting No. 1 2 2 3 2 4 5 6 7 8 9 10 11 2,3 12 2,3 13 2,3 14 2,3,12,13, 15 14 16 17 17 18 17 19 17,18 20 21 20, 21 22 23 24 25 20,21,23, 26 24,25 20,21,23, 27 24,25,26 2,3,14,20, 28 21,25,23, 24,26 25 29 2,3,14,25, 30 29 2,3,14,25, 31 29 2,3,14 32 2,3,20,21, 33 22 2,3,4 2,3,4,6
Part
Drum Assembly Plate Top Holder Assembly CST Opener Door Bracket Assembly L/D Motor Gear Assembly Rack F/L Arm Assembly F/L Lever Assembly S/W Arm Assembly Cleaner Head F/E Base Assembly A/C Head Brake Assembly T Brake Assembly RS Arm Assembly Tension Reel S/Reel T Base Assembly P4 Opener Lid Arm Assembly Pinch Lever T/Up / Arm T/Up Belt Capstan/Motor Capstan Lever F/R Clutch Assembly D35 Brake Assembly Capstan Gear Drive/Gear Cam Gear Sector Plate Slider Lever Tension Lever Spring
Fixing Type
3 Screw 2 Hook Chassis Hole Chassis Hole 3 Hook 1 Hook, Chassis Hole Chassis Hole 1 Hook Chassis Embossing Chassis Embossing 1 Screw 1 Hook 1 Hook 2 Hook
Fig- Viure ew
A-1 A-2 A-2 A-2 A-2 A-2 A-2 A-2 A-3 A-3 A-3 A-4 A-4 A-4 A-4 A-5 A-5 A-5 A-5 A-6 A-6 A-6 A-6 A-7 A-7 A-7 A-7 A7 T T T T T T T T T T T T T T T T T T T B B B B B B B B B
2
6 3
7
4 9 5 11
10 1 31 14 15 18 16 17 19 19 12
8
33
13 15
· Bottom View
Chassis Embossing Chassis Embossing Shaft 1 Hook 3 Screw Locking Tab Washer Locking Tab Washer/Hook 1 Hook Shaft Guide 1 Hook Locking Tab
20 24 23 20 24 22 21
30 29 29 30 25 32 27 26 28
Gear Assembly P2/Gear Assembly P3 Boss Base Assembly P2/Base Assembly P3 Chassis Slot Base Loading Base Tension Arm Assembly Idler 1 Screw Chassis Embossing Locking Tab
A-8 A-8 A-9 A-9 A-9
B B T B T
NOTE : When reassembly perform the procedure in the reverse order.
1) When reassembling, confirm Mechanism and Mode Switch Alignment Position (Refer to Page 4-13) 2) When disassembling, the Parts for Starting No. Should be removed first.
T:Top, B:Bottom
4-1
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DECK MECHANISM DISASSEMBLY
(S2) (S2) (S3) Drum Motor Stator
(S3) Rotor
Drum Sub Assembly (A)
(Fig. A-1-1)
Drum FPC
Carbon Brush
(S1) (S1) (S1) H2
H1
Holder FPC
Fig. A-1 1. Drum Assembly (Fig. A-1-1)
1) Unplug the Drum FPC Connector. 2) Remove three Screws(S1) on bottom side and separate the Drum assembly. 3) Unhook (H1), (H2) and separate the Holder FPC and Cap FPC.
(Fig. B-1)
Cap FPC
1-1. Drum Motor
1) Remove two Screws(S2) and disassemble the Stator of the Drum Motor. 2) Remove two Screws(S3) and separate the Rotor of the Drum Motor from the Drum Sub assembly.
Drum FPC Holder FPC
NOTE
When reassembling, confirm (A) portion of the Drum Sub assembly whether the Carbon Brush is in there or not. Figure in the opposite direction
4-2
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DECK MECHANISM DISASSEMBLY
Plate Top
(Fig. A-2-1)
(B') (B)
(C)
Holder Assembly CST
(Fig. A-2-2)
(E)
Arm Assembly F/L
(Fig. A-2-6)
Lever Assembly S/W (H8) Spring Lever S/W
(Fig. A-2-7)
(C1)
Bracket Assembly L/D Motor
(Fig. A-2-4)
(D)
(C')
(E')
Opener Door
(Fig. A-2-3)
(H6) Chassis (A) Gear Assembly Rack F/L (B)
(Fig. A-2-5)
Fig. A-2
4-3
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DECK MECHANISM DISASSEMBLY
2. Plate Top (Fig. A-2-1)
1) Pull the (B) portion of the Plate Top back in direction of arrow and separate the right side of it. 2) pull the (B') portion of the Plate Top back in direction of arrow and separate the left side of it. (Used tools : (-) type driver, anything tool with sharp point or flat point.) 2) Unhook three Hooks(H3, H4, H5) on bottom side of the Chassis, lift up the Bracket Assembly L/M and disassemble the Bracket Assembly L/D Motor.
(H4)
Bracket assembly L/M
NOTE
(1) When reassembling, push the Plate Top after alignment the two position(C), (C') as below Fig.
(H3)
(H5)
(C') (C) (B') (B)
6. Gear Assembly Rack F/L (Fig. A-2-5)
1) Move the Gear Assembly Rack F/L in direction of arrow(A) and unhook the Hook(H6) pulling back in front. 2) Separate the Gear Rack F/L in direction of arrow(B).
NOTE
When reassembling, align the gear part of the Gear Assembly Rack F/L with the Gear Drive as below Fig.
Gear Rack F/L
3. Holder Assembly CST (Fig.A-2-2)
1) Move the Holder Assembly CST in direction of arrow and separate the left side of it first through the (D) position of the Chassis.
Holder assembly CST Chassis Gear Drive
(D)
7. Arm Assembly F/L (Fig. A-2-6)
1) Move the Arm Assembly F/L in direction of arrow and separate the left side of it first. 2) Disassemble the Arm Assembly F/L from each guided hole of the Chassis.
2) Disassemble the right side of the Holder Assembly CST from each guided hole of the Chassis.
8. Lever Assembly S/W(Fig. A-2-7)
1) Unhook the Hook(H8) in the left side of the Chassis and remove the Lever Assembly S/W.
Chassis
NOTE
When reassembling, insert the (E) part of the Holder Assembly CST in the (E') hole of the Chassis first and assemble the left side of it.
4. Opener Door (Figure. A-2-3)
1) Turn the Opener Door clockwise and remove it through the guide hole of the Chassis.
(H8)
5. Bracket Assembly L/D Motor (Fig. A-2-4)
1) Unplug the Connector(C1).
4-4
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DECK MECHANISM DISASSEMBLY
Arm Assembly Cleaner (Fig. A-3-1) (A)
(S4) (A) Base Assembly A/C Head
(Fig. A-3-3)
Head F/E (Fig. A-3-2)
Chassis
Fig. A-3 9. Arm Assembly Cleaner (Fig. A-3-1)
1) Breakaway the (A) portion as Fig. A-3-1 from the embossing of the Chassis, turn the Arm assembly Cleaner to clockwise direction and lift it up.
11. Base Assembly A/C Head (Fig. A-3-3)
1) Remove the Screw(S4) and lift the Base Assembly A/C Head up.
10. Head F/E (Fig. A-3-2)
1) Breakaway the (A) portion of the Head F/E from the embossing of the Chassis, turn it to counterclockwise direction and lift it up.
4-5
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DECK MECHANISM DISASSEMBLY
Arm Assembly Tension
(Fig. A-4-3)
(H11) Spring TB Brake Assembly T
(Fig. A-4-1)
Spring Tension
Reel S
(Fig. A-4-4)
Reel T
(Fig. A-4-4)
Spring RS
Brake Assembly RS
(Fig. A-4