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PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS
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 YOUR BEING LIABLE FOR ANY RESULTING PROPERTY DAMAGE OR USER INJURY. SERVICE WORK SHOULD BE PERFORMED ONLY AFTER YOU ARE THOROUGHLY FAMILIAR WITH ALL OF THE FOLLOWING SAFETY CHECKS AND SERVICING GUIDELINES. TO DO OTHERWISE, INCREASES THE RISK OF POTENTIAL HAZARDS AND INJURY TO THE USER. WHILE SERVICING, USE AN ISOLATION TRANSFORMER FOR PROTECTION FROM A.C. LINE SHOCK. SUBJECT : 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 T.V. RECEIVERS IS THE PICTURE TUBE. HOWEVER, THIS TUBE DOES NOT EMIT X-RAYS WHEN THE HIGH VOLTAGE 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 C.R.T. ANODE CONNECTORS MUST BE USED. DEGAUSSING SHIELDS ALSO SERVE AS X-RAY SHIELD IN COLOR SETS, ALWAYS RE-INSTALL THEM. 3. IT IS ESSNTIAL THAT SERVICE PERSONNEL HAVE AVAILABLE AN ACCURATE AND RELIABLE HIGH VOLTAGE METER. THE CALIBRA TION OF THE METER SHOULD BE CHECKED PERIODICALLY AGAINST A REFERENCE STANDARD, SUCH AS THE ONE AVAILABLE AT YOUR DISTRIBUTOR. 4. WHEN THE HIGH VOLTAGE CIRCUITRY IS OPERATING PROPERLY THERE IS NO POSSIBILITY OF AN X-RADIATION PROBLEM. EVERY TIME A COLOR 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, WE SUGGEST THAT YOU AND YOUR SERVICE ORGANIZATION REVIEW TEST PROCEDURES SO THAT VOLTAGE REGULATION IS ALWAYS CHECKED AS A STANDARD SERVICING PROCEDURE. AND THAT THE HIGH VOLTAGE READING BE RECORDER ON EACH CUSTOMER'S INVOICE. 5. WHEN TROUBLESHOOTING AND MAKING TEST MEASUREMENTS IN A PRODUCT WITH A PROBLEM OF EXCESSIVE HIGH VOLTAGE, AVOID BEING UNNECESSARILY CLOSE TO THE PICTURE TUBE AND THE HIGH VOLTAGE SUPPLY. DO NOT OPERATE THE PRODUCT LONGER THAN IS NECESSARY TO LOCATE THE CAUSE OF EXCES SIVE VOLTAGE. 6. REFER TO HV. B+ AND SHUTDOWN ADJUSTMENT PROCEDURES DESCRIBED IN THE APPROPRIATE SCHEMATIC AND DIAGRAMS (WHERE USED). SUBJECT: IMPLOSION 1. ALL DIRECT VIEWED PICTURE TUBES ARE EQUIPPED WITH AN INTE GRAL IMPLOSION PROTECTION SYSTEM, BUT CARE SHOULD BE TAKEN TO AVOID DAMAGE DURING INSTALLATION, AVOID SCRATCHING THE TUBE. IF SCRATCHED REPLACE IT. 2. USE ONLY RECOMMENDED FACTORY REPLACEMENT TUBES. SUBJECT : TIPS ON PROPER INSTALLATION 1. NEVER INSTALL ANY PRODUCT IN A CLOSED-IN RECESS, CUBBYHOLE OR CLOSELY FITTING SHELF SPACE. OVER OR CLOSE TO 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 PALCEMENT WHERE DRAPERIES MAY OBSTRUCT REAR VENTING. THE CUSTOMER SHOULD ALSO AVOID THE USE OF DECORATIVE SCARVES OR OTHER COVERINGS WHICH 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 TEST ON CUSTOMIZED INSTALLATIONS. 5. CAUTION CUSTOMERS AGAINST THE MOUNTING OF A PRODUCT ON SLOPING SHELF OR A TILTED POSITION, UNLESS THE PRODUCT IS PROPERLY SECURED. 6. A PRODUCT ON A ROLL-ABOUT CART SHOULD BE STABLE ON 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 THE USE OF A CART OR STAND WHICH HAS NOT BEEN LISTED BY UNDERWRITERS LABORATORIES, INC. FOR USE WITH THEIR SPECIFIC MODEL OF TELEVISION RECEIVER OR GENERICALLY APPROVED FOR USE WITH T.V.'S OF THE SAME OR LARGER SCREEN SIZE. 8. CAUTION CUSTOMERS AGAINST THE USE OF EXTENSION CORDS, EXPLAIN THAT A FOREST OF EXTENSIONS SPROUTING FROM A SINGLE OUTLET CAN LEAD TO DISASTROUS CONSEQUENCES TO HOME AND FAMILY.
SAFETY CHECKS
AFTER THE ORIGINAL SERVICE PROBLEM HAS BEEN CORRECTED. A CHECK SHOULD BE MADE OF THE FOLLOWING.
SUBJECT : FIRE & SHOCK HAZARD
1. BE SURE THAT ALL COMPONENTS ARE POSITIONED IN SUCH A WAY AS TO AVOID POSSIBILITY OF ADJACENT COMPONENT SHORTS. THIS IS ESPECIALLY IMPORTANT ON THOSE MODULES WHICH ARE TRANSPORTED TO AND FROM THE REPAIR SHOP. 2. NEVER RELEASE A REPAIR UNLESS ALL PROTECTIVE DEVICES SUCH AS INSULATORS, BARRIERS, COVERS, SHIELDS, STRAIN RELIEFS, POWER SUPPLY CORDS, AND OTHER HARDWARE HAVE BEEN REINSTALLED PER 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, DAMAGED INSULATION (INCLUDING A.C. CORD). AND REPLACE IF NECESSARY FOLLOW ORIGINAL LAYOUT, LEAD LENGTH AND DRESS. 5. NO LEAD OR COMPONENT SHOULD TOUCH A RECIVING TUBE OR A RESISTOR RATED AT 1 WATT OR MORE. LEAD TENSION AROUND PROTRUNING METAL SURFACES MUST BE AVOIDED. 6. ALL CRITICAL COMPONENTS SUCH AS FUSES, FLAMEPROOF RESISTORS, CAPACITORS, ETC. MUST BE REPLACED WITH EXACT FACTORY TYPES, DO NOT USE REPLACEMENT COMPONENTS OTHER THAN THOSE SPECIFIED OR MAKE UNRECOMMENDED CIRCUIT MODIFICATIONS. 7. AFTER RE-ASSEMBLY OF THE SET ALWAYS PERFORM AN A.C. LEAKAGE TEST ON ALL EXPOSED METALLIC PARTS OF THE CABINET, (THE CHANNEL SELECTOR KNOB, ANTENNA TERMINALS. HANDLE AND SCREWS) TO BE SURE THE SET IS SAFE TO OPERATE WITHOUT DANGER OF ELECTRICAL SHOCK. DO NOT USE A LINE ISOLATION TRANSFORMER DURING THIS TEST USE AN A.C. 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. 150.V A.C TYPE CAPACITOR BETWEEN A KNOWN GOOD EARTH GROUND (WATER PIPE, CONDUIT, ETC.) AND THE EXPOSED METALLIC PARTS, ONE AT A TIME. MEASURE THE A.C. VOLTAGE ACROSS THE COMBINATION OF 1500 OHM RESISTOR AND .15 MFD CAPACITOR. REVERSE THE A.C. PLUG AND REPEAT A.C. VOLTAGE MEASUREMENTS FOR EACH EXPOSED METALLIC PART. VOLTAGE MEASURED MUST NOT EXCEED 75 VOLTS R.M.S. THIS CORRESPONDS TO 0.5 MILLIAMP A.C ANY VALUE EXCEEDING THIS LIMIT CONSTITUTES A POTENTIAL SHOCK HAZARD AND MUST BE CORRECTED IMMEDIATELY. A.C. VOLTMETER
GOOD EARTH GROUND SUCH AS THE WATER PIPE. CONDUIT. ETC
PLACE THIS PROBE ON EACH EXPOSED METAL PART
SUBJECT: GRAPHIC SYMBOLS
THE LIGHTNING FLASH WITH APROWHEAD SYMBOL. WITHIN AN EQUILATERAL TRIANGLE, IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF UNINSULATED "DANGEROUS VOLTAGE" THAT MAY BE OF SUFFICIENT MAGNITUDE TO CONSTITUTE A RISK OF ELECTRIC SHOCK. THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE LITERATURE.
1-3
SERVICING PRECAUTIONS
CAUTION : Before servicing the VCR+DVD covered by this service data and its supplements and addends, 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. Remembers Safety First: General Servicing Precautions 1. Always unplug the VCR+DVD 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+DVD 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+DVD 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 grouned-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.)
1-4
SECTION 2 CABINET & MAIN CHASSIS
CONTENTS
1. EXPLODED VIEWS ................................................................................................................2-2
1. Cabinet and Main Frame Section ...........................................................................................2-2 2. Packing Accessory Section ....................................................................................................2-3
2-1
1
457 457 457
2
A00
3
4
5
1. Cabinet and Main Frame Section
A
457 467 467 300 467 250 467
A26 A48
285
B
A46A
323
EXPLODED VIEWS
2-2
A46
260 276 330
467
A42
465
A43
LD 601
283
330
C
A49
284 274 452
280
OPTIONAL PARTS
452
D
2. Packing Accessory Section
810
CABLE ASS'Y, RF
806 CABLE, COAXIAL
811 PLUG ASS'Y(YELLOW) 812 PLUG ASS'Y(RED/WHITE)
813 PLUG ASS'Y(BLACK) 808 BATTERY 821 SCART CABLE 900 REMOCON 801 INSTRUCTION ASSEMBLY 804 BAG 803 PACKING 803 PACKING
802 BOX CARTON
OPTIONAL PARTS
2-3
SECTION 3 ELECTRICAL
CONTENTS
OVERALL BLOCK DIAGRAM.............................3-2 VCR PART ELECTRICAL ADJUSTMENT PROCEDURES ..........................................................3-3 ELECTRICAL TROUBLESHOOTING GUIDE ...........................................................................3-4
1. POWER(SMPS) CIRCUIT .......................................3-4 2. SYSTEM/KEY CIRCUIT ..........................................3-7 3. SERVO CIRCUIT.....................................................3-8 4. Y/C CIRCUIT..........................................................3-11 5. Hi-Fi CIRCUIT .......................................................3-15 6. Tuner/IF CIRCUIT .................................................3-18
DVD PART ELECTRICAL TROUBLESHOOTING GUIDE & WAVEFORMS.......................................3-54
1. SYSTEM OPERATION FLOW ..............................3-54 2. TEST & DEBUG FLOW ........................................3-55
DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING .................3-61
1. SYSTEM 27MHZ CLOCK, RESET, FLASH R/W SIGNAL...............................3-61 2. SDRAM CLOCK ....................................................3-61 3. TRAY OPEN/CLOSE SIGNAL ..............................3-62 4. SLED CONTROL RELATED SIGNAL (NO DISC CONDITION) ........................................3-65 5. LENS CONTROL RELATED SIGNAL (NO DISC CONDITION) ........................................3-65 6. LASER POWER CONTROL RELATED SIGNAL(NO DISC CONDITION)...........................3-66 7. DISC TYPE JUDGEMENT WAVEFORM ..............3-66 8. FOCUS ON WAVEFORM ......................................3-68 9. SPINDLE CONTROL WAVEFORM (NO DISC CONDITION) ........................................3-69 10. TRACKING CONTROL RELATED SIGNAL(SYSTEM CHECKING) ..........................3-70 11. RF WAVEFORM ..................................................3-71 12. MT1379 AUDIO OPTICAL AND COAXIAL OUTPUT (ASPDIF)..............................................3-71 13. MT1379 VIDEO OUTPUT WAVEFORM..............3-72 14. AUDIO OUTPUT FROM AUDIO DAC.................3-73
BLOCK DIAGRAMS ..............................................3-20
1. Power(SMPS) BLOCK DIAGRAM .......................3-20 2. Tu/IF, NICAM & A2 BLOCK DIAGRAM................3-22 3. VPS BLOCK DIAGRAM........................................3-23 4. Y/C BLOCK DIAGRAM .........................................3-24 5. Hi-Fi BLOCK DIAGRAM .......................................3-26 6. SYSTEM BLOCK DIAGRAM ................................3-28
CIRCUIT DIAGRAMS ............................................3-30
1. Power(SMPS) CIRCUIT DIAGRAM......................3-30 2. TU/IF, NICAM & A2 CIRCUIT DIAGRAM .............3-32 3. A/V CIRCUIT DIAGRAM .......................................3-34 4. Hi-Fi CIRCUIT DIAGRAM .....................................3-36 5. SCART(JACK) CIRCUIT DIAGRAM ....................3-38 6. SYSTEM CIRCUIT DIAGRAM ..............................3-40 7. TUNER CIRCUIT DIAGRAM.................................3-42 · WAVEFORM & VOLTAGE SHEET .........................3-44 · CIRCUIT VOLTAGE CHART...................................3-46
BLOCK DIAGRAMS ..............................................3-75
1. 2. 3. 4. OVERALL BLOCK DIAGRAM..............................3-75 SERVO BLOCK DIAGRAM ..................................3-76 MPEG & MEMORY BLOCK DIAGRAM ...............3-77 VIDEO & AUDIO BLOCK DIAGRAM ...................3-78
PRINTED CIRCUIT DIAGRAMS .......................3-50
1. 2. 3. 4. MAIN P.C.BOARD .................................................3-50 SMPS P.C.BOARD ...............................................3-52 KEY(LEFT) P.C.BOARD ......................................3-53 KEY(RIGHT) P.C.BOARD ....................................3-53
CIRCUIT DIAGRAMS ............................................3-79
1. SYSTEM CIRCUIT DIAGRAM ..............................3-79 2. RF & DSP SERVO CIRCUIT DIAGRAM...............3-81 3. AUDIO CIRCUIT DIAGRAM..................................3-83 4. AV/JACK CIRCUIT DIAGRAM..............................3-85 · CIRCUIT VOLTAGE CHART...................................3-87
PRINTED CIRCUIT DIAGRAMS .......................3-91
1. MAIN P.C.BOARD .................................................3-91
3-1
1 2 3 4 5 6 7 8 9 10 11 12
PMC01 CFG 1 12VA(CAP) 2 5.2VA 3 CAP REV'H' 4 I-limit 5 MOTOR GND 6 GND 7 12VA(DRUM) 8 CAP CTL 9 LD IN 10 DFG/FG 11 DRUM CTL 12
1 2 3 4 5 6
P3D02 CTL(+) CTL(-) A/E(+) A/E(-) A.REC A.PB
1 2 3 4 5 6
1 2
P3D03 GND FULL ERASE
1 2
1 2 3 4 5 6 7 8 9 10 11 12
PMP01 5.3VA 5.0V GND 12VA(DRUM) REG 12V 33V CAP Vcc PWR CTL 'H' GND NC TIMER 'H' GND
1 2 3 4 5 6 7 8 9 10 11 12
PMD01 PVD02 1 S/COMPO SW 1 2 COAXIAL 2 3 OPTICAL 3 4 GND 4 5 GND 5 6 K.RTN 1 6 7 DVD RESET 7 8 DVD ENA 8 9 DVD CLK 9 10 DVD DATA IN 10 11 DVD DATA OUT 11 12 GND 12 PMD02 PDV03 1 1 Y 2 2 GND 3 3 C 4 4 GND 5 5 Y/G 6 6 GND 7 7 Pb/B 8 8 GND 9 9 Pr/R 10 10 GND 11 C_V_OUT(DVD) 11 12 12 GND 13 D_A_L_OUT 13 14 14 GND 15 D_A_R_OUT 15 16 6DAC_MUTE 16 17 A_MUTE_L 17 18 A_MUTE_R 18 1 2 3 4 5 6 7 8 9 10 11
OVERALL WIRING DIAGRAM
3-2
DECK SMPS BOARD
1 2 3 4 5 6 7 8 9 PPD01 PDP01 5.3VA 1 8V 2 GND(M) 3 REG 12V 4 3.3V 5 5V 6 3.3V 7 GND 8 GND 9
VCR
MPEG BOARD
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 PMD03 Vcc(HF) RF DVD_LD DVD_PD VOL(DVD) GND VC_INPUT Vcc(HF) F E A D C B F(+) T(-) T(+) F(-) CD/DVD GND CD_LD MPD CD_VR PMD02 1 SPM + SPM 2 FM + 3 FM 4 LM 5 LM + 6 SW(OPEN) 7 SW(CLOSE) 8 GND 9 SW(LEAD IN) 10 GND 11 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
MD
VCR PART
ELECTRICAL ADJUSTMENT PROCEDURES
1. Servo Adjustment
1) PG Adjustment
· Test Equipment a) OSCILLOSCOPE b) NTSC MODEL : NTSC SP TEST TAPE C) PAL MODEL : PAL SP TEST TAPE
· Adjustment And Specification MODE
PLAY
MEASUREMENT POINT
V.Out H/SW(JP05, JP06)
ADJUSTMENT POINT
R/C TRK JIG KEY
SPECIFICATION
6.5 ± 0.5H
· Adjustment Procedure
a) Insert the SP Test Tape and play. Note - Adjust the distance of X, pressing the Tracking(+) or Tracking(-) when the "ATR" is blink after the SP Test Tape is inserted. b) Connect the CH1 of the oscilloscope to the H/SW(JP05, JP06) and CH2 to the Video Out for the VCR. c) Trigger the mixed Combo Video Signal of CH2 to the CH1 H/SW(JP05, JP06), and then check the distance (time difference), which is from the selected A(B) Head point of the H/SW(JP05, JP06) signal to the starting point of the vertical synchronized signal, to 6.5H ± 0.5H (412µs, 1H=63µs).
· PG Adjustment Method
a-1) Payback the SP standard tape b-2) Press the "1" key on the Remote controller and the "PLAY" key on the Front Panel the same time, then it goes in to Tracking initial mode. c-3) Repeat the above step(No.b-2), then it finishes the PG adjusting automatically. d-4) Stop the playback, then it goes out to PG adjusting mode after mony the PG data.
· CONNECTION
V.Out
OSCILLOSCOPE CH1 CH2 H/SW(JP05, JP06) R/C KEY
· WAVEFORM
H/SW V.out (JP05, JP06)
H/SW 6.5H(416us)
Composite VIDEO
3-3
ELECTRICAL TROUBLESHOOTING GUIDE
1. Power(SMPS) CIRCUIT
(1) No 5.3VA (SYS/Hi-Fi/TUNER) NO 5.3VA.
YES
(2) No 12VA (TO CAP, DRUM MOTOR) NO 12VA.
YES
Is the F101 normal?
YES
NO
Replace the F101. (Use the same Fuse)
Is the Vcc(13V) supplied NO to (+) terminal in D115?
YES
Check or Replace the D110.
Is the BD101 normal?
YES
NO
Replace the BD101.
Is the Vcc(12V) supplied NO to (-) terminal in D115?
YES
Replace the D115.
Is the R101 normal?
YES
NO
Replace the R101.
Check or Replace the Motor Vcc.
Is Vcc(8.5~21V) supplied to IC101 Pin7?
YES
NO
Is the D102 normal? NO Check or Replace the D102. (3) No 5.2V (SYS/Hi-Fi/TUNER)
Is the D112 normal?
YES
NO
NO 5.2VA. Replace the D112.
YES
Is there about 2.5V NO at the IC103 Vref?
YES
Replace the IC103.
NO Is 5.3VA put into the Q160 Emitter?
YES
5.3VA Line Check.
Check the Main PCB 5.3VA/5.0V Line short?
Is the Q162 Base "H"?
YES
NO
Check the Power Control.
Is about 5V put into NO the Q160 Base?
YES
Check or Replace the Q162, R157, R158, R159, D121.
Check or Replace the Q162/Q160.
3-4
(4) No 5V (TO DVD) NO 5V.
YES
(5) No 33V (TUNER) No 33V.
YES
NO Is 5.3VA put into the Q160 Emitter?
YES
5.3VA Line Check.
Is Q162 Base "H"?
YES
NO
Check the Power Control.
Is the Q162 Base "H"?
YES
NO
Check the Power Control.
Check or Replace Q161, R154, R155.
Is about 5V put into NO the Q160 Base?
YES
Check or Replace the Q162, R157, R158, R159, D121.
Check or Replace the Q162/Q160
(6) No REG 12V No REG 12V.
YES
Is 13V put into the Q156 Collector?
YES
NO
Check or Replace D110.
Is 13V put into the R153 Base?
YES
NO
Check 33V Line.
Check or Replace the Q156, ZD103, R153, C151.
3-5
(7) No 8V(TO DVD) NO 8V.
YES
(8) No 3.3V(TO DVD) NO 3.3V.
YES
Is Vcc(13V) supplied to NO (+) terminal in D114?
YES
Check or Replace the D110.
Is Vcc(4V) supplied to IC152 Pin1?
YES
NO
Check or Replace the D111.
Is Vcc(12V) supplied NO to IC151 Pin1?
YES
Check or Replace the D114.
Is the Q162 Base "H"?
YES
NO
Check the Power Control.
Is the Q162 Base "H"?
YES
NO
Check the Power Control.
Check or Replace IC152, R156, C153.
Check or Replace IC151, R170, C154.
3-6
2. SYSTEM/KEY CIRCUIT (1) AUTO STOP
Auto Stop YES Does the SW25 waveform appear at the IC501 Pin105? YES NO Do the T-UP Reel Pulses appear at the IC501 Pin49? YES Replace the IC501. Do T/UP Reel Pulses appear at the Q514 Base terminal ? YES Replace the T/UP Reel Sensor (RS501). NO Does 5.2V appear at the RS501? YES NO NO Check the Drum Motor signal.
Check the Power Circuit.
(2) The unstable loading of a Cassette tape
The unstable loading of a Cassette tape YES Is 12V applied to the PMC01 Pin8? YES Does the "H" signal appear at the IC501 Pin30 during inserting the CST ? YES Does the "L" signal appear at the IC501 Pin72 during inserting the CST? NO YES Check the Deck Mechanism. Check the IC501 Pins68, 69, 70, 71. Check the CST SW and the peripheral circuitry. NO Is 5.3V applied to the R544 ? YES NO NO Check the Power.
Refer to SMPS 5.3VA troubleshooting.
Caution : Auto stop can occur because Grease or Oil is dried up
3-7
3. SERVO CIRCUIT (1) Unstable Video in PB MODE
Unstable Video in PB Mode. YES Does the Noise level of the screen change periodically? YES Do the CTL pulses appear at the IC501 Pin8? YES Does the CFG waveform appear at the IC501 Pin9? YES On tracking do the CTL pulses move? YES Does the Video Envelope waveform appear at the IC501 Pin24? YES Replace the IC501. NO Refer to "When the Y signal doesn't appear on the screen in PB Mode". NO Replace the IC501. NO Is adjusting the height of the CTL Head accurate? NO Readjust the height of the CTL Head.
Refer to "(2) No 12VA of Power section" Do the Drum PWM Pulses appear at the IC501 Pin107? YES Aren't the foil patterns and the Components between IC501 Pin107 and PMC01 Pin12 short? NO Do the DFG Pulses appear at the IC501 Pin104? NO YES Do the Drum PWM Pulses appear at the IC501 Pin107? YES Aren't the connecting patterns and the Components between IC501 Pin107 and PMC01 Pin12 short? 3-8 NO Aren't the foil patterns and the Components between IC501 Pin104 and PMC01 Pin11 short? Replace the IC501. NO YES
(2) When the Drum Motor (2) doesn't run.
When the Drum Motor doesn't run,
Do the DFG Pulses appear at the PMC01 Pin11? NO Replace the Cap M.
Does 12V appear at the PMC01 Pin8? YES Does 2.8V appear at the PMC01 Pin12? YES Check the connector (PMC01) and the Drum Motor Ass'y.
NO
2. SERVO CIRCUIT (3) When the Capstan Motor doesn't run,
When the Capstan Motor doesn't run,
Does 12VA appear at the PMC01? YES Does 2.8V appear at the PMC01?
NO
Refer to "SMPS(CAPSTAN/12Volt) Trouble Shooting".
NO YES Check the PMC01 and the Capstan Motor Ass'y. YES NO Aren't the foil patterns and Components between IC501 Pin108 and PMC01 Pin9 short? YES NO Does the CFG signal come into the IC501 Pin9? NO YES Does the Capstan PWM signal appear at the IC501 Pin108? NO YES Aren't the foil patterns and Components between IC501 Pin108 and PMC01 Pin9 short? Replace the IC501. Aren't the foil patterns and component between IC501 Pin9 and PMC01 Pin1 short? Check the Capstan Motor Ass'y. Does the CFG signal appear at the PMC01 Pin1? Does the PWM signal appear at the IC501 Pin108?
3-9
(4) KEY doesn't working
KEY doesn't working.
Is 5V applied to the IC501 Pin36? YES Does LED or FLD change when a function button is pressed?
NO
Refer to "SMPS 5.3VA Trouble Shooting".
NO
Replace the defective switches.
3-10
4. Y/C CIRCUIT (1) No Video in EE Mode,
No Video in EE Mode
Does the Video signal appear at the IC301 Pin48? YES Is 5V applied to the IC301 Pins18, 24, 42, 55, 72, 91? YES Does the Video signal appear at the IC301 Pin65? YES Does the Video signal appear at the IC501 Pin19? YES Does the Video signal appear at the Emitter terminal of the Q307, Q308?
NO
Check the 24Pin of Tuner.
NO
Check the 5.2VT, 5.3VA Line. (Power Circuit)
NO
Is I2C BUS signal applied to the IC301 Pins68, 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 Pin65 and IC501 Pin17.
Check C316. (AGC)
YES
NO
Does the 12VT, 5.4VA NO appear at the Emitter terminal of the Q804, Q308. YES Replace the Q804, Q308.
Replace the IC301.
Check the 12VT, 5.4VA Line. (Power Circuit)
3-11
3. Y/C CIRCUIT (2) When the Y(Luminance) signal doesn't appear on the screen in PB Mode,
Is 5.2VT, 5.3VA applied to the IC301 Pins24, 42, 55, 72, 91? YES Is the I2C Bus siganl applied NO to the IC301 Pins68, 69 ? YES Does the normal RF signal appear at the IC301 Pin78? NO Is the V.H.S/W signal applied to the IC301 Pin70? YES Is V.H.S/W "H" about 3.4V at the IC301 Pin70? YES YES Clean the Drum. NO Replace the IC301. NO Check the V.H.S/W level. (Check R303, R304) NO Check the System Circuit. (IC501 Pin105) Refer to `SYSTEM I2C BUS CHECK Trouble Shooting'. NO Check the line of the 5.2VT, 5.3VA Line. (Power Circuit)
Does the Y(Luminance) RF NO signal appear at the IC301 Pin76? YES Is the Y(Luminance) Video waveform showed up at theIC301 Pin43? 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
3-12
3. Y/C CIRCUIT (3) When the C(Color) signal doesn't appear on the screen in PB Mode,
Is 5.2VT/5.3VA applied to the IC301 Pins24, 42, 55, 72, 91. YES Is the Color Rotary signal applied to the IC301 Pin70? YES Is Color Rotary "H" about 3.4V? YES Does the Color signal appear at the IC301 Pin25 ? YES Does the Color signal appear at the IC301 Pin21? YES Replace the IC301. Replace the IC301. NO Check the Color Pass. 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 Pin99 ) NO Check the line of the 5.2VT/ 5.3VA Line. (Power Circuit)
3-13
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/5.3VA applied to the IC301 Pins24,42,55,72,91? YES Does PB Mdoe operate normally? YES Does the RF signal appear at the IC301 Pin78? YES
Check EE Mode.
NO
Check the line of the 5.2VT/ 5.3VA Line.(Power Circuit)
NO
Check PB Mode.
NO
Is the REC `H' signal (about 4V) applied to the IC301 Pin80? YES Check REC Luminance Pass & Color Pass.
NO
Check the System of REC `H'. (the IC501 Pin47 / the D301)
YES
Replace the IC301.
Does the REC RF signal appear at the IC301 Pins88,89,94,95? YES Check the Drum & Drum Connector
NO
Check the circuit of the IC301 Pins85, 86.
YES
3-14
5. Hi-Fi CIRCUIT (A) No Sound(EE Mode)
No Sound. YES Check the TU Audio of IC801 Pins2, 3. NO Check the IC751 Pins30, 31.
Check the DVD Audio of IC801 Pins4, 5.
NO
Check the DVD MODULE. (PMD02 Pins13, 15).
Check the AV1 Audio of IC801 Pins6, 7.
NO
Check the Scart1 Jack. (SC901 Scart1 Audio in Pins2, 6).
Check the AV2 Audio of IC801 Pins8, 9.
Check the Scart2 Jack. (SC901 Scart2 Audio in Pins2, 6).
Check the AV3 Audio of IC801 Pins10, 11.
NO
Check the front Jack. (L5F1, L5F2).
YES Check the Vcc of IC801 Pins34, 40, IC802 Pin4. YES Check the IIC Clock and DATA at IC801 Pins42, 43, IC802 Pins32, 33. YES NO Check the Audio of IC801 Pins16, 17. YES NO Check the Audio of IC802 Pins22, 26. YES Replace IC802. Replace IC801. NO Check the IC501 Pins59, 60. NO Check the Power 5.2V, 12VT.
Check the JK902.
3-15
3. Y/C CIRCUIT (B) Hi-Fi Playback
PB mode YES No Sound. YES Check the Vcc of IC801 (Pins34, 40) YES NO Check Power 5.2V, 12VT.
NO Check the Hi-Fi Selection switch. (IC801 Pin41) and the Tape quality. YES Is the RF Envelope at IC801 Pin44 over 2Vp-p? YES Check IC801 Pin42(Data), Pin43(Clock) YES NO
Check IC501 Pin106 (A.H/SW)
NO
Check the parts of µ-COM (IC501 Pins59, 60)
NO Do Audio Signals appear at IC801 Pin16(L-CH), 17(R-CH)? YES NO Do Audio Signals appear at IC802 Pin10(L-CH), 16(R-CH)? YES Do Audio Signals appear at NO IC802 Pins22, 26? YES
Check the Connection at P3D01 Pins7, 9.
Check the A.IN line of IC802(C808, C809)
Check the Vcc of IC802 Pin4. YES Replace IC802.
NO
Check Power.
Do Audio Signals appear at JK902?
NO
Check the Jack(JK902)
3-16
(C)
Hi-Fi REC. YES It can't be recorded Hi-Fi Audio signal. YES Check Vcc of IC801.(Pins34, 40) YES Check IC801 Pin42(Data), Pin43(CLOCK). YES Do Audio signals appear at IC801 Pins16, 17? YES Do FM Audio signals appear at IC801 Pin36? YES Check the Contact Point of Drum Connector if good then Replace the Drum. NO Replace IC801. NO Check Audio input signal of IC801 Pins2, 3(TU.A.), 4, 5(DVD.A.), 6, 7(AVI.A.), 8, 9(AV2.A.), 10, 11(AV3.A.). NO Check ports of µ-COM. (IC501 pins 59, 60) NO Check Power 5V, 12VT.
3-17
6. Tuner/IF CIRCUIT (A) No Picture on the TV screen
No picture on the TV screen YES Does the Video signal at the TU701 Pin24. YES
NO
Is +33V applied to TU701 Pin16? YES Is +5V applied to TU701 Pin13? YES Does the Clock signal appear at TU701 Pin11? YES Does the data signal appear at TU701 Pin12? YES Replace Tuner.
NO
Check 33V line.
NO
Check 5V line.
NO
Check the lIC Clock Signal of µ-COM Pin59.
NO
Check the lIC Data Signal of µ-COM Pin60.
Does Sync appear at IC501 Pin111. YES Does the Video signal at the IC501 Pin19. YES Does the Video signal at the IC301 Pin61. YES Does the Video signal at the IC802 Pin30.
NO
Check the signal flow from TU701 Pin24 to IC301 Pin48.
NO
Check the signal from IC301 Pin65 to IC501 Pin17.
NO
Check the signal from IC501 Pin19 to IC301 Pin56.
NO
Check the signal from IC501 Pin61 to IC802 Pin1.
Check the signal flow from IC802 Pin30 to SC901 Pin19. 3-18
(B) No Sound
No Sound. YES Check the Vcc of IC751 Pins1, 11, 19, 22, 33. YES Check the Tuner SiF signal at IC751 Pin2. YES Check the oscillator of IC751 Pins5, 6. YES Check the Audio of IC751 Pins30, 31. YES Check the Audio of IC801 Pins2, 3. YES Check the Audio of IC801 Pins16, 17. YES Check the Audio of IC802 Pins22, 26. YES Check the Signal flow from IC802 Pins22, 26, SC901 Pins1, 3. NO Check the signal flow from IC801 Pins16, 17 to IC802 Pins10, 16. NO Check the IIC Clock and Data at IC801 Pins42, 43. NO Check the signal flow from IC751 Pins30, 31 to IC801 Pins2, 3. NO Check the IIC Clock and Data at IC751 Pins12, 13. NO Replace X751 NO Check the Tuner SIF of TU701 Pin22. NO Check 5.2V Line.
3-19
BLOCK DIAGRAMS
1. POWER(SMPS) BLOCK DIAGRAM
R101 BD101
1 4 3 2
SNUBBER BLOCK
(D101, R104, C105, C106)
8
C103
5 12 13
RECTIFIER & SMOOTHING
(D110, C123, L122, C126, C163)
DRIVE & S/W BLOCK OVER CURRENT LIMIT BLOCK
(IC101,BD01,D102,R105, C108,R107,C107,C109)
D115
TO CAP MOT 12VA TO DRUM MOT 12VA TO DVD/Hi-Fi REG 12V TO DVD 8V
12VA REG BLOCK
(Q156,ZD103,C151, C152,R153)
D117 T/W
3 14 15
!
RECTIFIER & SMOOTHING
(D111, C127, L123, C128)
8VA REG BLOCK
(D114, IC151, C154)
LINE FILTER BLOCK
(C101, L102, C102)
16
3.3V REG BLOCK
(IC152, C153)
TO DVD 3.3V
! 17 V101 ! F101
RECTIFIER & SMOOTHING
(D112, L124, C129, C131)
RECTIFIER & SMOOTHING
2 18
(D113, R119, C132)
33V S/W BLOCK
(Q114, R154, R155)
TO TUNER 33V TO SYS/Hi-Fi/Tu 5.3VA TO SYS/Hi-Fi/Tu 5.0V TO DVD 5V
HOT GND PW101 C110 ! C111 !
4
1
FEED-BACK BLOCK
(R112, R113, C133, R114, R115, R116, R117)
3
! IC102
2
5V BLOCK
(R157, Q160, R158, R159, D121, C155)
BR BL (BK) (WH)
IC103
HOT CIRCUIT
Symbol denotes AC ground. Symbol denotes DC chassis ground.
PWR CTL BLOCK
(Q162,R163,R164, R171,C161)
FROM µ-COM PWR CTL 'H'
NOTES :
COMBI SCART VC6's
3-20
3-21
5.2VT
S.V.W
60
59
93
94
(From Power)
143
872
159
871
2. Tu/IF, NICAM & A2 BLOCK DIAGRAM
MSP3417 MSP3407
159
27 731
3. VPS BLOCK DIAGRAM
151 5.2VA
14
VSUP
378 VPS V.out
13
CVBS
158
12
Iref
11 10
VC01 PD2/ VC02
151
5.4VA
PD1
GND
SCL
SDA
CSO
1
59 CLK 60 DATA 55 DAV
COMBI SCART VC6's
2
3
4
VCS
3-22 3-23
9
8
T1
VPS BLOCK
IC7V1
SDA5650
DATA/SYNV SLICER CLOCK PLL
DATA AQUISITION
IIC BUS INTERFACE
TIMING DA VIN EHB
5
6
7
(PB MODE)
V.H.SW
C.ROTARY DATA CLOCK
C.SYNC
V.OUT (MICOM)
S2 V.OUT
79 60dB AMP PB FM AGC SUB LPF Y/C MIX Y-LPF PB FM EQ V.ENV YNR 84 FM OEM 46 MAIN DE EMP
4. Y/C BLOCK DIAGRAM
78
70
69
68
67
65
63
61
S1 V.OUT Y-Delay
87
IC301 LA71750M
43
90 C LPF 93 ACC MAIN CONV BPF C-Delay (1H/2H)
96
ACC DET
CCD LPF
SYNC IN CNC 29
IC201 LA70100M
21 25 18 14
REC'H'
V.H.SW
C.ROTARY
DATA
CLOCK
V.OUT MICOM
80
79
78
76
75
70
69
68
67
C SYNC
65
59
58
V.IN4 FRONT V.IN3 DEC
3-24 (REC MODE) 3-25
54 52 29 16 IC201 LA70100M W/D CLIP W/D CLIP 88 UP REC (To Drum) 89 94 (To Drum) SP REC 95 YNR Y-DELAY 43 REC FM EQ NL EMPHA AGC DETAIL ENH Y-LPF FBC 46 SW 50 48 V.IN2 S1 V.IN1 TUNER 2 12
IC301 LA71750M
Killer C-LPF Main Conv
BPF 1H/2H DELAY ACC Main Conv COMP AMP
KILL DEC REC APC VX02 21 27 28
33 32 VX02 31 29 CLK-IN 4.43MHz COMBI SCART VC6's
5. Hi-Fi BLOCK DIAGRAM
VIDEO INPUT BLOCK
A B
AUDIO INPUT BLOCK
Tu A.IN 'L' 1 2 Tu A.IN 'R' DVD A.IN 'L' DVD A.IN 'R' EU1 A.IN 'L' EU1 A.IN 'R' EU2 A.IN 'L' EU2 A.IN 'R' AV2 A.IN 'L' AV2 A.IN 'R' 3 4 5 6 7 8 9 10 11
37 Hi-Fi PB 'B'
36 Hi-Fi REC
35 Hi-Fi PB 'A' 1 A.OUT 'L' A.OUT 'R' 29
16
10 16
DVD/R V. IN
OSD V. IN
Hi-Fi/ REC
22
IC801
17
IC802
6 12
26
A.OUT To JACK
21
22
DVD A.IN 'R'
DVD A.IN 'L'
NORMAL AUDIO OUT(To AVCP)
MODULATOR A.OUT (To Tu)
NORMAL AUDIO IN(From AVCP)
AUDIO INPUT BLOCK
COMBI SCART VC6's
3-26
3-27
6. SYSTEM BLOCK DIAGRAM
VCR DATA OUT DVD CLK
VCR DATA IN
DVD
DAV
LD(+) LD(-)
OTPB LED 'H'
IC501 HD6432197A
L/M CONTROL R525, R526
CANAL DET 'H'
R/C IN(2W)
NC
CST SW A.ENV
2fsc R524, R514, R518, R516, R589, C577, C576, L501, Q504
COMBI SCART VC6's
3-28
3-29
CIRCUIT DIAGRAMS
1. POWER(SMPS) CIRCUIT DIAGRAM
No power. BD101, R101 are defective.
IMPORTANT SAFETY NOTICE WHEN SERVICING THIS CHASSIS, UNDER NO CIRCUMSTANCES SHOULD THE ORIGINAL DESIGN BE MODIFIED OR ALTERED WITHOUT PERMISSION FROM THE LG ELECTRONICS CORPORATION. ALL COMPONENTS SHOULD BE REPLACED ONLY WITH TYPES IDENTICAL TO THOSE IN THE ORIGINAL CIR-
CUIT. SPECIAL COMPONENTS ARE SHADED ON THE NOTE : SCHEMATIC FOR EASY IDENTIFICATION. 1. Shaded( ) parts are critical for safety. Replace only THIS CIRCUIT DIAGRAM MAY OCCASIONALLY DIFwith specified part number. FER FROM THE ACTUAL CIRCUIT USED. THIS WAY, 2. Voltages are DC-measured with a digital voltmeter IMPLEMENTATION OF THE LATEST SAFETY AND during Play mode. PERFORMANCE IMPROVEMENT CHANGES INTO THE SET IS NOT DELAYED UNTIL THE NEW SERVICE LITERATURE IS PRINTED.
12VA no power. D110 is defective.
2.5V, 3.3V no power. D111 is defective.
Switching Error. IC101 is defective.
33V no power. D113 is defective.
5.3VA no power. D112 is defective.
No Power. F101 is defective.
Switching Error. IC105, 102 are defective.
COMBI SCART VC6's
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.
3-30
3-31
2. TU/IF, NICAM & A2 CIRCUIT DIAGRAM
(COMBI SCART)
EE MODE(VIDEO) TU MODE (AUDIO)
3-32
3-33
3. A/V CIRCUIT DIAGRAM
IC301 Pin 69, 68 are defective. PB and Recording is failed. (IC301 doesn't operate.) IC301 Pin70 is defective. PB COLOR Signal disappear. Q305 is defective. EE, PB Screen doesn't appear.
D301or IC301 Pin 80 REC is defective.
9 1
3
6 2 2 2
IC301 Pin 84 is defective. Audio Tracking is failed.
14 10 7
4
5 11 12 8 13
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
FL301, Q301, Q306 are defective. Normal Audio signal is not recorded.
(COMBI SCART)
PB AUDIO(MONO)
WAVEFORM
3-34
3-35
4. Hi-Fi CIRCUIT DIAGRAM
IC801 Pins42, 43 aredefective. All Audio is not appear.
44 Pin is defective. Hi-Fi Audio is not appear.
OPTIONAL PART
(COMBI SCART)
PB REC
3-36
3-37
5. SCART(JACK) CIRCUIT DIAGRAM
OPTIONAL PART
(COMBI SCART)
3-38
3-39
6. SYSTEM CIRCUIT DIAGRAM
SW is defective. Key service dead.
Reset is defective. Set dead. IC504 is defective.
CLOCK SETTING will not operate. X501 is defective.
µ-COM will not operate. X502 is defective.
RC501 is defective. R/C will not operate.
5 5 1 2 9 3 4 6 7 8
VCR will not operate. IC505 is defective.
Deck will not operate. R575, R576, R577, R578 are defective.
Auto stop occures. RS501,RS502,Q514, Q515 are defective.
Auto Rew will not working. ES501, ES502, LD501 are defective. µ-COM is unstable. Q501, Q503 are defective.
(COMBI SCART)
WAVEFORM
3-40
3-41
6. TIMER CIRCUIT DIAGRAM
03. 4. 10 SR14090V V620NYK
3-42
3-43
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