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DVD/CD PLAYER Hi-Fi STEREO VIDEO CASETTE RECORDER
Service Manual,Part List & Schematics
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SERVICE MANUAL
DVD/CD PLAYER Hi-Fi STEREO VIDEO CASETTE RECORDER
HR-XVC1U
TV VCR DVD POWER
DVD MENU DISPLAY MARKER A.TRK SUB TITLE SP/EP
PLAY MODE
RETURN C.RESET ANGLE TITLE
OPEN/ CLOSE
ZERO RETURN
SEARCH MODE
ZOOM
REPEAT A-B
TV
POWER INPUT
TV VOL
0
REW
TIMER
TV/VCR
PLAY
FF
STOP
REC
PAUSE
SKIP /INDEX
TV/VCR CH +
SKIP /INDEX
SET
SET UP MENU
ENTER/ SELECT
SET
CANCEL
TV/VC CH -- R
OSD
A.MONITOR
SLOW
SKIP SEARCH
VCR/DVD/TV
SPECIFICATIONS
GENERAL Power supply: Power consumption: Weight: Dimensions: AC 120V 60Hz Operation: 20W Stand by: 3W 9.9lbs (4.5 kg) Width : 16-15/16 inches (430 mm) Height : 3-7/8 inches (99 mm) Depth : 12-1/4 inches (311 mm) DVD section Signal system: Applicable disc: Audio characteristics: Frequency response: S/N Ratio: Harmonic distortion: Wow and flutter: Dynamic range: Output: NTSC DVD (12cm, 8cm), CD (12cm, 8cm) DVD: 4Hz - 22KHz CD: 4Hz - 20KHz 90dB 0.01% Below Measurable Level 90dB Video : (RCA) 1 Vp-p/75ohm Audio : (RCA) -8 dBm/1Kohm Digital Audio : 0.5Vp-p 75 ohm CD : Wavelength: 775 - 805 nm Maximum output power: 0.5 mW DVD : Wavelength: 640 - 660 nm Maximum output power: 1.0 mW Remote control x 1 Batteries (2 x AA) 75 ohm Coaxial Cable x 1 AUDIO/VIDEO Cable x 1
Inputs/Outputs: Video:
In: 1Vp-p/75 ohm Out: 1Vp-p/75 ohm Audio: In: -8 dBm/50K ohm Out: -8 dBm/1K ohm Antenna: UHF/VHF IN/OUT: 75 ohm coaxial Hi-Fi Frequency Response: 20Hz to 20,000Hz Hi-Fi Dynamic Range: More than 90dB VCR section Video Head: Audio Track: Tuner:
Pickup:
RF Channel Output: F.FWD/REW Time:
ACCESSORIES: 4 Rotary Heads Hi-Fi Sound - 2 Tracks / MONO Sound - 1 Track 181 Channel Freq. Synthesized VHF 2-13 UHF 14-69 CATV 14-36 (A)-(W) 37-59 (AA)-(WW) 60-85 (AAA)-(ZZZ) 86-94 (86)-(94) 95-99 (A-5)-(A-1) 100-125 (100)-(125) 01 (5A) Channel 3 or 4, Switchable Approx. 1minutes and 48 seconds (with T-120 Cassette Tape) (at+25 C)
This service manual is printed on 100% recycled paper. COPYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTD
No.82902 January 2002
TABLE OF CONTENTS
Section Title Page Section Title Page
Important Safety Precautions INSTRUCTIONS DISASSEMBLY INSTRUCTIONS 1.REMOVAL OF MECHANICAL PARTS AND P.C.BOARDS .................................................................. 1-1 1-1 TOP CABINET AND FRONT CABINET .................. 1-1 1-2 FLAP ....................................................................... 1-1 1-3 VCR DECK .............................................................. 1-1 1-4 VCR MT PCB .......................................................... 1-1 1-5 DECK CD AND MPEG MT PCB .............................. 1-2 1-6 POWER PCB .......................................................... 1-2 2.REMOVAL OF VCR DECK PARTS ................................. 1-1 2-1 TOP BRACKET ....................................................... 1-3 2-2 CASSETTE HOLDER ASS'Y .................................. 1-3 2-3 CASSETTE SIDE L/R ............................................. 1-3 2-4 LINK UNIT ............................................................... 1-3 2-5 LINK LEVER/FLAP LEVER ..................................... 1-3 2-6 LOADING MOTOR/WORM ..................................... 1-4 2-7 TENSION ASS'Y ..................................................... 1-4 2-8 T BRAKE ARM/T BRAKE BAND ............................. 1-5 2-9 S REEL/T REEL/IDLER ARM ASS'Y/IDLER GESR ........ 1-5 2-10 CASSETTE OPENER/PINCH ROLLER BLOCK/P5 ARM ASS'Y ........................................... 1-6 2-11 A/C HEAD ............................................................... 1-6 2-12 FE HEAD(RECORDER ONLY) ............................... 1-6 2-13 AHC ASS'Y/CYLINDER UNIT ASS'Y ...................... 1-6 2-14 CAPSTAN DD UNIT ................................................ 1-7 2-15 MAIN CAM/PINCH ROLLER CAM/JOINT GEAR ............ 1-7 2-16 LOADING GEAR S/T UNIT .............................................. 1-7 2-17 CLUTCH ASS'Y/RING SPRING/ CLUTCH LEVER/CLUTCH GEAR ................................... 1-8 2-18 CASSETTE GUIDE POST/ INCLINED BASE S/T UNIT/P4 CAP ................................ 1-8 3.REMOVAL AND INSTALLATION OF FLAT PACKAGE IC ....... 1-9 REMOVAL ........................................................................ 1-9 INSTALLATION .............................................................. 1-10 KEY TO ABBREVIATIONS ............................................. 1-11 SERVICE MODE LIST ..................................................... 1-13 WHEN REPLACING EEPROM (MEMORY) IC ............... 1-14 PARENTAL CONTROL - RATING LEVEL ...................... 1-14 PREVENTIVE CHECKS AND SERVICE INTERVALS CONFIRMATION OF HOURS USED .............................. 1-15 CLEANING ...................................................................... 1-16 PECULUIAR SERVICE ................................................... 1-17 1.DVD SECTION ............................................................. 1-17 DISC REMOVAL METHOD AT NO POWER SUPPLY ... 1-17 ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE (WIRING CONNECTION) ............... 1-18 2.VHS SECTION .............................................................. 1-19 SERVICING FIXTURES AND TOOLS ........................... 1-19 MECHANISM ADJUSTMENT PARTS LOCATION GUIDE ...... 1-19 MECHANICAL ADJUSTMENTS TAPE REMOVAL METHOD AT NO POWER SUPPLY .... 1-20 1.CONFIRMATION AND ADJUSTMENT ......................... 1-20 1-1 CONFIRMATION AND ADJUSTMENT OF TENSION POST POSITION ................................. 1-20 1-2 CONFIRMATION OF PLAYBACK TORQUE AND BACK TENSION TORQUE DURING PLAY BACK .. 1-20 1-3 CONFIRMATION OF VSR TORQUE .................... 1-20 1-4 CONFIRMATION OF REEL BRAKE TORQUE ..... 1-21 2.CONFIRMATION AND ADJUSTMENT OF TAPE RUNNING MECHANISM .................................... 1-21 2-1 GUIDE ROLLER ................................................... 1-21 2-2 CONFIRMATION AND ADJUSTMENT OF AUDIO/CONTROL HEAD ..................................... 1-22 2-3 TAPE RUNNING ADJUSTMENT .......................... 1-22 ELECTRICAL ADJUSTMENTS 1.BASIC ADJUSTMENT .................................................. 1-23 1-1 SWITCHING POINT .............................................. 1-23 ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE ........ 1-23 IC DESCRIPTIONS ......................................................... 1-24 SERVO TIMING CHART ................................................. 1-27 MECHANISM TIMING CHART ........................................ 1-28 TROUBLESHOOTING GUIDE VCR SECTION .......................................................................... 1-29 DVD SECTION .......................................................................... 1-52 INTERCONNECTION DIAGRAM ................................................ 2-1 POWER SCHEMATIC DIAGRAM ................................................ 2-3 MPEG SCHEMATIC DIAGRAM ................................................... 2-5 SDRAM SCHEMATIC DIAGRAM ................................................ 2-7 DVD SYSCON SCHEMATIC DIAGRAM ...................................... 2-9 VIDEO ENCORDER SCHEMATIC DIAGRAM ........................... 2-11 Y/C AUDIO/CCD/HEAD AMP SCHEMATIC DIAGRAM ............. 2-13 VCR SYSCON SCHEMATIC DIAGRAM .................................... 2-15 TUNER/JACK SCHEMATIC DIAGRAM ..................................... 2-17 REGULATOR SCHEMATIC DIAGRAM ..................................... 2-19 OPERATION/DISPLAY SCHEMATIC DIAGRAM ....................... 2-21 Hi-Fi/DEMODULATOR SCHEMATIC DIAGRAM ....................... 2-23 DVD IN/OUT SCHEMATIC DIAGRAM ....................................... 2-25 OPERATION SCHEMATIC DIAGRAM ...................................... 2-27 PRINTED CIRCUIT BOARDS POWER/OPERATION .............................................................. 2-29 MPEG .............................................................................. 2-30 VCR .............................................................................. 2-31 WAVEFORMS ............................................................................ 2-35 DVD BLOCK DIAGRAM ............................................................ 2-39 Y/C/AUDIO/CCD/HEAD AMP BLOCK DIAGRAM ..................... 2-41 SYSTEM CONTROL BLOCK DIAGRAM ................................... 2-43 REGULATOR BLOCK DIAGRAM .............................................. 2-45 OPERATION/DISPLAY BLOCK DIAGRAM ............................... 2-47 HIFI/DEMODULATOR BLOCK DIAGRAM ................................. 2-49 TUNER/JACK BLOCK DIAGRAM ............................................. 2-51 DVD IN/OUT BLOCK DIAGRAM ............................................... 2-53 POWR BLOCK DIAGRAM ......................................................... 2-55 PARTS LIST 3.1 PACKING AND ACCESSORY ASSEMBLY ..... 3-1 3.2 FINAL ASSEMBLY ........................................... 3-2 3.3 MECHANISM ASSEMBLY ............................... 3-3 3.4 ELECTRICAL PARTS LIST ....................................... 3-7 VCR MT PCB ASSEMBLY <03> ............................... 3-7 MPEG MT PCB ASSEMBLY <50> .......................... 3-11 POWER PCB ASSEMBLY <01> .............................. 3-13 OPERATION PCB ASSEMBLY <28> ...................... 3-14 Reference .......................................................................... 4-1
The following table lists the differing points between Models (HR-XVC1U and HR-XVC1U(C)) in this series.
ITEM INSTRUCTION LANGUAGE REGISTRATION CARD GUARANTEE CARD SERVICE STAION LIST MODEL HR-XVC1U ENGLISH USED NOT USED NOT USED HR-XVC1U(C) ENGLISH, FRENCH NOT USED USED USED
Important Safety Precautions
Prior to shipment from the factory, JVC products are strictly inspected to conform with the recognized product safety and electrical codes of the countries in which they are to be sold. However, in order to maintain such compliance, it is equally important to implement the following precautions when a set is being serviced.
Precautions during Servicing
1. Locations requiring special caution are denoted by labels and inscriptions on the cabinet, chassis and certain parts of the product. When performing service, be sure to read and comply with these and other cautionary notices appearing in the operation and service manuals. symbol and shaded ( ) parts are 2. Parts identified by the critical for safety. Replace only with specified part numbers. Note: Parts in this category also include those specified to comply with X-ray emission standards for products using cathode ray tubes and those specified for compliance with various regulations regarding spurious radiation emission. 3. Fuse replacement caution notice. Caution for continued protection against fire hazard. Replace only with same type and rated fuse(s) as specified. 4. Use specified internal wiring. Note especially: 1) Wires covered with PVC tubing 2) Double insulated wires 3) High voltage leads 5. Use specified insulating materials for hazardous live parts. Note especially: 1) Insulation Tape 3) Spacers 5) Barrier 2) PVC tubing 4) Insulation sheets for transistors 6. When replacing AC primary side components (transformers, power cords, noise blocking capacitors, etc.) wrap ends of wires securely about the terminals before soldering. Fig.4 (3) Align the lengths of the wires to be connected. Insert the wires fully into the connector. Fig.1 7. Observe that wires do not contact heat producing parts (heatsinks, oxide metal film resistors, fusible resistors, etc.) 8. Check that replaced wires do not contact sharp edged or pointed parts. 9. When a power cord has been replaced, check that 10-15 kg of force in any direction will not loosen it. 12. Crimp type wire connector In such cases as when replacing the power transformer in sets where the connections between the power cord and power transformer primary lead wires are performed using crimp type connectors, if replacing the connectors is unavoidable, in order to prevent safety hazards, perform carefully and precisely according to the following steps. 1) Connector part number : E03830-001 2) Required tool : Connector crimping tool of the proper type which will not damage insulated parts. 3) Replacement procedure (1) Remove the old connector by cutting the wires at a point close to the connector. Important : Do not reuse a connector (discard it).
cut close to connector
Fig.3 (2) Strip about 15 mm of the insulation from the ends of the wires. If the wires are stranded, twist the strands to avoid frayed conductors.
15 mm
Metal sleeve
Connector
Fig.5 (4) As shown in Fig.6, use the crimping tool to crimp the metal sleeve at the center position. Be sure to crimp fully to the complete closure of the tool.
Power cord
1.2 5 2.0 5.5
Crimping tool
Fig.2 10. Also check areas surrounding repaired locations. 11. Products using cathode ray tubes (CRTs) In regard to such products, the cathode ray tubes themselves, the high voltage circuits, and related circuits are specified for compliance with recognized codes pertaining to X-ray emission. Consequently, when servicing these products, replace the cathode ray tubes and other parts with only the specified parts. Under no circumstances attempt to modify these circuits. Unauthorized modification can increase the high voltage value and cause X-ray emission from the cathode ray tube.
Fig.6 (5) Check the four points noted in Fig.7.
Not easily pulled free Crimped at approx. center of metal sleeve
Conductors extended Wire insulation recessed more than 4 mm
Fig.7
1
S40888-01
Safety Check after Servicing
Examine the area surrounding the repaired location for damage or deterioration. Observe that screws, parts and wires have been returned to original positions, Afterwards, perform the following tests and confirm the specified values in order to verify compliance with safety standards. 1. Insulation resistance test Confirm the specified insulation resistance or greater between power cord plug prongs and externally exposed parts of the set (RF terminals, antenna terminals, video and audio input and output terminals, microphone jacks, earphone jacks, etc.). See table 1 below. 2. Dielectric strength test Confirm specified dielectric strength or greater between power cord plug prongs and exposed accessible parts of the set (RF terminals, antenna terminals, video and audio input and output terminals, microphone jacks, earphone jacks, etc.). See table 1 below. 3. Clearance distance When replacing primary circuit components, confirm specified clearance distance (d), (d') between soldered terminals, and between terminals and surrounding metallic parts. See table 1 below. Chassis Fig. 8 4. Leakage current test Confirm specified or lower leakage current between earth ground/power cord plug prongs and externally exposed accessible parts (RF terminals, antenna terminals, video and audio input and output terminals, microphone jacks, earphone jacks, etc.). Measuring Method : (Power ON) Insert load Z between earth ground/power cord plug prongs and externally exposed accessible parts. Use an AC voltmeter to measure across both terminals of load Z. See figure 9 and following table 2.
d d'
Power cord, primary wire
a
b c
Externally exposed accessible part
Z V
Fig. 9 5. Grounding (Class 1 model only) Confirm specified or lower grounding impedance between earth pin in AC inlet and externally exposed accessible parts (Video in, Video out, Audio in, Audio out or Fixing screw etc.). Measuring Method: Connect milli ohm meter between earth pin in AC inlet and exposed accessible parts. See figure 10 and grounding specifications.
AC inlet
Exposed accessible part
Grounding Specifications Region USA & Canada Europe & Australia Grounding Impedance (Z) Z 0.1 ohm Z 0.5 ohm
Earth pin Milli ohm meter
Fig. 10
AC Line Voltage 100 V 100 to 240 V 110 to 130 V 110 to 130 V 200 to 240 V Japan
Region
Insulation Resistance (R) R 1 M/500 V DC 1 M R 12 M/500 V DC R 10 M/500 V DC
Dielectric Strength AC 1 kV 1 minute AC 1.5 kV 1 miute AC 1 kV 1 minute AC 3 kV 1 minute (Class 2) AC 1.5 kV 1 minute (Class 1)
Clearance Distance (d), (d') d, d' 3 mm d, d' 4 mm d, d' 3.2 mm d 4 mm d' 8 mm (Power cord) d' 6 mm (Primary wire)
USA & Canada Europe & Australia
Table 1 Specifications for each region
AC Line Voltage 100 V 110 to 130 V 110 to 130 V 220 to 240 V
Region Japan USA & Canada
0.15 µF
Load Z
1 k
Leakage Current (i) i 1 mA rms i 0.5 mA rms i 0.7 mA peak i 2 mA dc i 0.7 mA peak i 2 mA dc
a, b, c Exposed accessible parts Exposed accessible parts Antenna earth terminals Other terminals
1.5 k 2 k 50 k
Europe & Australia
Table 2 Leakage current specifications for each region Note: These tables are unofficial and for reference only. Be sure to confirm the precise values for your particular country and locality.
2
S40888-01
IMPORTANT WARNING
CAUTION: DVD PLAYER IS A CLASS 1 LASER PRODUCT. HOWEVER THIS PLAYER USES A VISIBLE LASER BEAM WHICH COULD CAUSE HAZARDOUS RADIATION EXPOSURE IF DIRECTED. BE SURE TO OPERATE THE PLAYER CORRECTLY AS INSTRUCTED. THE FOLLOWING CAUTION LABEL IS LOCATED ON THE REAR PANEL OF THE PLAYER.
CLASS 1
(Printed on the Rear Panel)
WHEN THIS PLAYER IS PLUGGED TO THE WALL OUTLET, DO NOT PLACE YOUR EYES CLOSE TO THE OPENING OF THE DISC TRAY AND OTHER OPENINGS TO LOOK INTO THE INSIDE OF THIS PLAYER. USE OF CONTROLS OR ADJUSTMENTS OR PERFORMANCE OF PROCEDURES OTHER THAN THOSE SPECIFIED HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE. DO NOT OPEN COVERS AND DO NOT REPAIR YOURSELF. REFER SERVICING TO QUALIFIED PERSONNEL.
SERVICING NOTICES ON CHECKING
1. KEEP THE NOTICES
LASER PRODUCT
As for the places which need special attentions, they are indicated with the labels or seals on the cabinet, chassis and parts. Make sure to keep the indications and notices in the operation manual.
3. PUT PARTS AND WIRES IN THE ORIGINAL POSITION AFTER ASSEMBLING OR WIRING
There are parts which use the insulation material such as a tube or tape for safety, or which are assembled in the condition that these do not contact with the printed board. The inside wiring is designed not to get closer to the pyrogenic parts and high voltage parts. Therefore, put these parts in the original positions.
2. USE THE DESIGNATED PARTS
The parts in this equipment have the specific characters of incombustibility and withstand voltage for safety. Therefore, the part which is replaced should be used the part which has the same character. Especially as to the important parts for safety which is indicated in the circuit diagram or the table of parts as a mark, the designated parts must be used.
4. PERFORM A SAFETY CHECK AFTER SERVICING
Confirm that the screws, parts and wiring which were removed in order to service are put in the original positions, or whether there are the portions which are deteriorated around the serviced places serviced or not. Check the insulation between the antenna terminal or external metal and the AC cord plug blades. And be sure the safety of that.
DISASSEMBLY INSTRUCTIONS
1. REMOVAL OF MECHANICAL PARTS AND P.C. BOARDS
1-1: TOP CABINET AND FRONT CABINET (Refer to Fig. 2-1) 1. 2. 3. 4. 5. 6. 7. Remove the 5 screws 1. Remove the Top Cabinet in the direction of arrow (A). Disconnect the following connector: (CP651). Unlock the 7 supports 2. Remove the Front Cabinet in the direction of arrow (B). Remove the 3 screws 3. Remove the Operation PCB in the direction of arrow (C).
Top Cabinet
1-3: VCR DECK (Refer to Fig. 1-3) 1. Unlock the 2 supports 1 and remove the Top Holder. 2. Remove the 3 screws 2. 3. Disconnect the following connectors: (CP101, CP102, CP103 and CP3001). 4. Remove the AC Head Cover and VCR Deck in the direction of arrow.
1 1 1
AC Head Cover VCR Deck
1 1
Top Holder
1 1
(A) CP103
1 1
CP101 CP102
1
Front Cabinet (B) CP3001
2 2
2
3 2
3
3
Operation PCB
Fig. 1-3 1-4: VCR MT PCB (Refer to Fig. 1-4) Fig. 1-1 1. Remove the screw 1. 2. Remove the 7 screws 2. 3. Disconnect the following connectors: (CP1701, CP8001 and CP8002). 4. Remove the VCR MT PCB in the direction of arrow.
2 2
2
CP651
1-2: FLAP (Refer to Fig. 1-2) 1. Open Flap to 90° and flex in direction of arrow (A), at the same time slide in direction of arrow (B). 2. Then lift in direction of arrow (C).
CP1701
2
(A) CP8001 (C) VCR MT PCB CP8002
1
(B)
2
22
2
2 2
Flap
Fig. 1-2 Fig. 1-4
1-1
DISASSEMBLY INSTRUCTIONS
1-5: DECK CD AND MPEG MT PCB (Refer to Fig. 1-5) 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. Disconnect the following connector: (CP503). Remove the 2 screws 1. Remove the 2 screws 2. Remove the Deck Angle 1/2 in the direction of arrow (A). Remove the 2 screws 3. Remove the Front Shield in the direction of arrow (B). Disconnect the following connectors: (CP4001 and CP4002). Remove the 4 screws 4. Remove the Deck CD in the direction of arrow (C). Remove the 4 screws 5. Remove the MPEG Shield in the direction of arrow (D). Remove the MPEG MT PCB in the direction of arrow (E).
4 4
1-6: POWER PCB (Refer to Fig. 1-6) 1. Remove the 3 screws 1. 2. Remove the Power PCB in the direction of arrow.
1 1
1
Power PCB
Bottom Plate
Fig. 1-6
Deck CD
4 4
(C)
5 5
5
5
MPEG Shield (D) MPEG MT PCB CP4001
1
Front Shield (B)
2
CP4002 (E)
2
Deck Angle 2
1
Deck Angle 1
CP503
3 3
(A)
Fig. 1-5
1-2
DISASSEMBLY INSTRUCTIONS
2. REMOVAL OF VCR DECK PARTS
2-1: TOP BRACKET (Refer to Fig. 2-1) 1. Extend the 2 supports 1. 2. Slide the 2 supports 2 and remove the Top Bracket. NOTE 1. After the installation of the Top Bracket, bend the support 1 so that the Top Bracket is fixed.
Top Bracket Locker R Check if these positions are locked.
NOTE 1. In case of the Locker R installation, check if the two positions of Fig. 2-3-B are correctly locked. 2. When you install the Cassette Side R, be sure to move the Locker R after installing.
1
Top Bracket
1
Cassette Side R
2
Main Chassis
2
Fig. 2-3-B Fig. 2-1 2-4: LINK UNIT (Refer to Fig. 2-4) 1. Set the Link Unit to the Eject position. 2. Unlock the support 1. 3. Remove the (A) side of the Link Unit first, then remove the (B) side.
Main Chassis Link Unit
Main Chassis
2-2: CASSETTE HOLDER ASS'Y (Refer to Fig. 2-2) 1. Move the Cassette Holder Ass'y to the front side. 2. Push the Locker R to remove the Cassette Side R. 3. Remove the Cassette Side L.
Cassette Side R Main Chassis Locker R
(A) Link Unit
(B)
Main Chassis Link Unit Cassette Side L Main Chassis
Fig. 2-2 2-5: LINK LEVER/FLAP LEVER (Refer to Fig. 2-5) 1. Extend the support 1. 2. Remove the Link Lever. 3. Remove the Flap Lever.
Fig. 2-4
2-3: CASSETTE SIDE L/R (Refer to Fig. 2-3-A) 1. Remove the Locker Spring. 2. Unlock the 4 supports 1 and then remove the Cassette Side L/R. 3. Unlock the support 2 and then remove the Locker R.
Locker Spring
1 1 2
Locker R Cassette Holder
1
Flap Lever
1
1
Link Lever
Cassette Side R
Fig. 2-5
Cassette Side L
Fig. 2-3-A
1-3
DISASSEMBLY INSTRUCTIONS
2-6: LOADING MOTOR/WORM (Refer to Fig. 2-6-A) 1. Remove the screw 1. 2. Remove the Loading Motor. 3. Remove the Worm.
Tension Arm Ass'y
Fig. 2-7-A
Loading Motor
1
Tension Connect Worm Main Chassis
1 3
Tension Band
Tension Spring Tension Holder · Screw Torque: 3 ± 0.5kgf·cm
Tension Arm Ass'y
1
Fig. 2-6-A
2 4
NOTE 1. In case of the Worm installation, check if the value of the Fig. 2-6-B is correct. 2. In case of the Loading Motor installation, hook the wire on the Cassette Opener as shown Fig. 2-6-C. Fig. 2-7-B
19.2 ± 0.1mm
NOTE 1. In case of the Tension Band installation, note the direction of the installation. (Refer to Fig. 2-7-C) 2. In case of the Tension Band installation, install correctly as Fig. 2-7-D. 3. In case of the Tension Connect installation, install as the circled section of Fig. 2-7-E.
Safety surface for pressing of the insert.
Fig. 2-6-B
Tension Band Tension Connect
Loading Motor
Fig. 2-7-C
[OK]
Cassette Opener
Tension Connect Tension Band
[NG] Fig. 2-6-C 2-7: TENSION ASS'Y (Refer to Fig. 2-7-B) 1. Turn the Pinch Roller Cam clockwise so that the Tension Holder hook is set to the position of Fig. 2-7-A to move the Tension Arm Ass'y. 2. Remove the Tension Spring. 3. Unlock the 2 supports 1 and remove the Tension Band. 4. Unlock the support 2 and remove the Tension Arm Ass'y. 5. Unlock the support 3 and remove the Tension Connect. 6. Float the hook 4 and turn it clockwise then remove the Tension Holder. 1-4
Tension Connect Tension Band
Fig. 2-7-D
Tension Connect
Main Chassis
Fig. 2-7-E
DISASSEMBLY INSTRUCTIONS
2-8: T BRAKE ARM/T BRAKE BAND (Refer to Fig. 2-8-A) 1. Remove the T Brake Spring. 2. Turn the T Brake Arm clockwise and bend the hook section to remove it. 3. Unlock the 2 supports 1 and remove the T Brake Band.
T Brake Band (A) Hook section T Reel Idler Gear Idler Arm Ass'y (B) S Reel
1 1
T Brake Arm T Brake Spring
1
(A)
1
Fig. 2-8-A NOTE 1. In case of the T Brake Band installation, install correctly as Fig. 2-8-B. [OK]
T Brake Band T Brake Arm
Fig. 2-9-A NOTE 1. In case of the S Reel and T Reel installation, check if the correct parts are installed. (Refer to Fig. 2-9-B) 2. In case of the Idler Arm Ass'y installation, install correctly as Fig. 2-9-C. And also set it so that the section "B" of Fig. 2-9-A is placed under the Main Chassis tab.
[NG]
T Brake Band
T Brake Arm
Fig. 2-8-B 2-9: S REEL/T REEL/IDLER ARM ASS'Y/IDLER GEAR (Refer to Fig. 2-9-A) 1. Remove the S Reel and T Reel. 2. Remove the 2 Polyslider Washers 1. 3. Remove the Idler Arm Ass'y and Idler Gear. NOTE 1. Take care not to damage the gears of the S Reel and T Reel. 2. The Polyslider Washer may be remained on the back of the reel. 3. Take care not to damage the shaft. 4. Do not touch the section "A" of S Reel and T Reel. (Use gloves.) (Refer to Fig. 2-9-A) Do not adhere the stains on it. 5. When you install the reel, clean the shaft and grease it (FG-84M). (If you do not grease, noise may be heard in FF/REW mode.) 6. After installing the reel, adjust the height of the reel. (Refer to MECHANICAL ADJUSTMENT) [OK]
Clutch Gear Idler Arm Ass'y
Big Hole (S Reel)
Small Hole (T Reel)
Fig. 2-9-B
[NG]
Idler Arm Ass'y Clutch Gear
Fig. 2-9-C
1-5
DISASSEMBLY INSTRUCTIONS
2-10: CASSETTE OPENER/PINCH ROLLER BLOCK/P5 ARM ASS'Y (Refer to Fig. 2-10-A) 1. Unlock the support 1 and remove the Cassette Opener. 2. Remove the Pinch Roller Block and P5 Arm Ass'y.
1
Cassette Opener
Spring Position Pinch Roller Block
Fig. 2-11-B
P5 Arm Ass'y
2-12: FE HEAD (RECORDER ONLY) (Refer to Fig. 2-12) 1. Remove the screw 1. 2. Remove the FE Head.
1
Main Chassis
Fig. 2-10-A NOTE 1. Do not touch the Pinch Roller. (Use gloves.) 2. In case of the Pinch Roller Block and the Pinch Roller Cam installation, install correctly as Fig. 2-10-B.
FE Head
Pinch Roller Block
Can be seen the hole of the Pinch Roller Cam.
P5 Arm Ass'y · Screw Torque: 5 ± 0.5kgf·cm · The FE Head is not installed on the Video Cassette Player.
Fig. 2-12
Can be seen the hole of the Main Cam.
Fig. 2-10-B
2-13: AHC ASS'Y/CYLINDER UNIT ASS'Y (Refer to Fig. 2-13) 1. Disconnect the following connector: (CD2001) 2. Remove the 3 screws 1. 3. Remove the Cylinder Unit Ass'y. NOTE 1. When you install the Cylinder Unit Ass'y, tighten the screws from (1) to (3) in order while pulling the Ass'y toward the left front direction.
CD2001
2-11: A/C HEAD (Refer to Fig. 2-11-A) 1. 2. 3. 4. Remove the screw 1. Remove the A/C Head Base. Remove the 3 screws 2. Remove the A/C Head and A/C Head Spring.
NOTE 1. Do not touch the A/C Head. (Use gloves.) 2. When you install the A/C Head Spring, install as shown in Fig. 2-11-B. 3. When you install the A/C Head, tighten the screw (1) first, then tighten the screw (2), finally tighten the screw (3).
(1) (3)
Cylinder Unit Ass'y
2 2
(2)
2
A/C Head
A/C Head Spring
1
A/C Head Base · Screw Torque: 5 ± 0.5kgf·cm (Screw 1) · Screw Torque: 3 ± 0.5kgf·cm (2) (1)
(3)
1 1
1
Fig. 2-11-A
Fig. 2-13
1-6
DISASSEMBLY INSTRUCTIONS
2-14: CAPSTAN DD UNIT (Refer to Fig. 2-14-A) 1. Remove the Capstan Belt. 2. Remove the 3 screws 1. 3. Remove the Capstan DD Unit. 2-15: MAIN CAM/PINCH ROLLER CAM/JOINT GEAR (Refer to Fig. 2-15-A) 1. Remove the E-Ring 1, then remove the Main Cam. 2. Remove the E-Ring 2, then remove the Pinch Roller Cam and Joint Gear.
1
Capstan Belt Capstan DD Unit Main Cam
2
Pinch Roller Cam
Joint Gear
Fig. 2-15-A NOTE
1
· Screw Torque: 4 ± 0.5kgf·cm
1 1
Fig. 2-14-A
NOTE 1. In case of the Capstan DD Unit installation, apply the silicon bond (TSE3843-W) on the position Fig. 2-14-B correctly. (If no silicon bond applied, abnormal noise will be heard on the deck operation.) (Refer to Fig. 2-14-B, C)
Applied position of silicon bond
1. In case of the Pinch Roller Cam and Main Cam installation, install them as the circled section of Fig. 2-15-B so that the each markers are met. (Refer to Fig. 2-15-B) And also can be seen the Main Chassis hole through the Main Cam maker hole.
Pinch Roller Cam
Marker
Main Cam
Be careful not to apply the silicon bond to the Pinch Roller.
Fig. 2-15-B 2-16: LOADING GEAR S/T UNIT (Refer to Fig. 2-16-A) 1. Remove the E-Ring 1 and remove the Main Loading Gear. 2. Remove the Main Rod, Tension Lever, Loading Arm S Unit and Loading Arm T Unit.
1
Silicon Bond Main Chassis Main Loading Gear Main Rod Loading Arm T Unit Tension Lever
Fig. 2-14-B
Capstan DD Unit
Fig. 2-14-C
Loading Arm S Unit
Fig. 2-16-A
1-7
DISASSEMBLY INSTRUCTIONS
NOTE 1. When you install the Loading Arm S Unit, Loading Arm T Unit and Main Loading Gear, align each marker. (Refer to Fig. 2-16-B)
Marker
2-18: CASSETTE GUIDE POST/INCLINED BASE S/T UNIT/P4 CAP (Refer to Fig. 2-18-A) 1. Remove the P4 Cap. 2. Unlock the support 1 and remove the Cassette Guide Post. 3. Remove the Inclined Base S Unit and Inclined Base T Unit.
Cassette Guide Post
Main Loading Gear Marker
1
Inclined Base S Unit
Inclined Base T Unit
P4 Cap Loading Arm T Unit Loading Arm S Unit
Fig. 2-16-B 2-17: CLUTCH ASS'Y/RING SPRING/CLUTCH LEVER/ CLUTCH GEAR (Refer to Fig. 2-17-A) 1. 2. 3. 4. Remove the Polyslider Washer 1. Remove the Clutch Ass'y and Ring Spring. Remove the Clutch Lever. Remove the Coupling Gear, Coupling Spring and Clutch Gear.
1
Clutch Ass'y Ring Spring
Fig. 2-18-A NOTE 1. Do not touch the roller of Guide Roller. 2. In case of the P4 Cap installation, install it with parallel for "A" and "B" of Fig. 2-18-B. 3. In case of the Cassette Guide Post installation, install correctly as the circled section of Fig. 2-18-C.
"A" "B"
Coupling Gear Coupling Spring Clutch Gear
Clutch Lever
P4 Cap
Cassette Opener
Fig. 2-17-A Fig. 2-18-B NOTE 1. In case of the Clutch Ass'y installation, install it with inserting the spring of the Clutch Ass'y into the dent of the Coupling Gear. (Refer to Fig. 2-17-B) [OK]
Cassette Guide Post
Clutch Ass'y
[NG]
Cassette Guide Post
Coupling Gear
Fig. 2-17-B 1-8
Fig. 2-18-C
DISASSEMBLY INSTRUCTIONS
3. REMOVAL AND INSTALLATION OF FLAT PACKAGE IC
REMOVAL 1. Put the Masking Tape (cotton tape) around the Flat Package IC to protect other parts from any damage. (Refer to Fig. 4-1.) NOTE Masking is carried out on all the parts located within 10 mm distance from IC leads.
IC Masking Tape (Cotton Tape) Blower type IC desoldering machine
3. When IC starts moving back and forth easily after desoldering completely, pickup the corner of the IC using a tweezers and remove the IC by moving with the IC desoldering machine. (Refer to Fig. 4-3.) NOTE Some ICs on the PCB are affixed with glue, so be careful not to break or damage the foil of each IC leads or solder lands under the IC when removing it.
Tweezers
Fig. 4-1 2. Heat the IC leads using a blower type IC desoldering machine. (Refer to Fig. 4-2.) NOTE Do not add the rotating and the back and forth directions force on the IC, until IC can move back and forth easily after desoldering the IC leads completely.
IC
Fig. 43 4. Peel off the Masking Tape. 5. Absorb the solder left on the pattern using the Braided Shield Wire. (Refer to Fig. 4-4.) NOTE
Blower type IC desoldering machine
Do not move the Braided Shield Wire in the vertical direction towards the IC pattern.
Braided Shield Wire Soldering Iron
IC
Fig. 4-2
IC pattern
Fig. 4-4
1-9
DISASSEMBLY INSTRUCTIONS
INSTALLATION 1. Take care of the polarity of new IC and then install the new IC fitting on the printed circuit pattern. Then solder each lead on the diagonal positions of IC temporarily. (Refer to Fig. 4-5.) 4. When bridge-soldering between terminals and/or the soldering amount are not enough, resolder using a Thintip Soldering Iron. (Refer to Fig. 4-8.)
IC Thin-tip Soldering Iron
Soldering Iron
Fig. 4-8 5. Finally, confirm the soldering status on four sides of the IC using a magnifying glass. Confirm that no abnormality is found on the soldering position and installation position of the parts around the IC. If some abnormality is found, correct by resoldering. NOTE When the IC leads are bent during soldering and/or repairing, do not repair the bending of leads. If the bending of leads are repaired, the pattern may be damaged. So, be always sure to replace the IC in this case.
Solder temporarily
Solder temporarily
Fig. 4-5 2. Supply the solder from the upper position of IC leads sliding to the lower position of the IC leads. (Refer to Fig. 4-6.)
Solder
Soldering Iron
IC
Supply soldering from upper position to lower position
Fig. 4-6 3. Absorb the solder left on the lead using the Braided Shield Wire. (Refer to Fig. 4-7.) NOTE Do not absorb the solder to excess.
Soldering Iron IC
Braided Shield Wire
Fig. 4-7
1-10
KEY TO ABBREVIATIONS
A A/C ACC AE AFC AFT AFT DET AGC AMP ANT A.PB APC ASS'Y AT AUTO A/V B BGP BOT BPF BRAKE SOL BUFF B/W C C CASE CAP CARR CH CLK CLOCK (SY-SE) COMB CONV CPM CTL CYL CYL-M CYL SENS D DATA (SY-CE) dB DC DD Unit DEMOD DET DEV E E EF EMPH ENC ENV EOT EQ EXT F F FBC FE FF FG FL SW FM FSC FWD G GEN GND H H.P.F : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : Audio/Control Automatic Color Control Audio Erase Automatic Frequency Control Automatic Fine Tuning Automatic Fine Tuning Detect Automatic Gain Control Amplifier Antenna Audio Playback Automatic Phase Control Assembly All Time Automatic Audio/Video Burst Gate Pulse Beginning of Tape Bandpass Filter Brake Solenoid Buffer Black and White Capacitance, Collector Cassette Capstan Carrier Channel Clock Clock (Syscon to Servo) Combination, Comb Filter Converter Capstan Motor Control Cylinder Cylinder-Motor Cylinder-Sensor Data (Syscon to Servo) Decibel Direct Current Direct Drive Motor Unit Demodulator Detector Deviation Emitter Emitter Follower Emphasis Encoder Envelope End of Tape Equalizer External Fuse Feed Back Clamp Full Erase Fast Forward, Flipflop Frequency Generator Front Loading Switch Frequency Modulation Frequency Sub Carrier Forward Generator Ground High Pass Filter I H.SW Hz IC IF IND INV KIL L LED LIMIT AMP LM, LDM LP L.P.F LUMI. M MAX MINI MIX MM MOD MPX MS SW NC NR OSC OPE PB PB CTL PB-C PB-Y PCB P. CON PD PG P-P R REC REC-C REC-Y REEL BRK REEL S REF REG REW REV, RVS RF RMC RY S. CLK S. COM S. DATA SEG SEL SENS SER SI SIF SO SOL SP STB SW : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : Head Switch Hertz Integrated Circuit Intermediate Frequency Indicator Inverter Killer Left Light Emitting Diode Limiter Amplifier Loading Motor Long Play Low Pass Filter Luminance Motor Maximum Minimum Mixer, mixing Monostable Multivibrator Modulator, Modulation Multiplexer, Multiplex Mecha State Switch Non Connection Noise Reduction Oscillator Operation Playback Playback Control Playback-Chrominance Playback-Luminance Printed Circuit Board Power Control Phase Detector Pulse Generator Peak-to Peak Right Recording Recording-Chrominance Recording-Luminance Reel Brake Reel Sensor Reference Regulated, Regulator Rewind Reverse Radio Frequency Remote Control Relay Serial Clock Sensor Common Serial Data Segment Select, Selector Sensor Search Mode Serial Input Sound Intermediate Frequency Serial Output Solenoid Standard Play Serial Strobe Switch 1-11
K L
M
N O P
R
S
KEY TO ABBREVIATIONS
S SYNC SYNC SEP T TR TRAC TRICK PB TP U UNREG V V VCO VIF VP V.PB VR V.REC VSF VSR VSS V-SYNC VT X X'TAL Y Y/C : : : : : : : : : : : : : : : : : : : : : Synchronization Sync Separator, Separation Transistor Tracking Trick Playback Test Point Unregulated Volt Voltage Controlled Oscillator Video Intermediate Frequency Vertical Pulse, Voltage Display Video Playback Variable Resistor Video Recording Visual Search Fast Forward Visual Search Rewind Voltage Super Source Vertical-Synchronization Voltage Tuning Crystal Luminance/Chrominance
1-12
SERVICE MODE LIST
This unit provided with the following SERVICE MODES so you can repair, examine and adjust easily. To enter to the SERVICE MODE function, press and hold both buttons simultaneously on the main unit or on the main unit and on the remote control for more than a standard time (second). Set Key Set Key Standard Time (seconds) Operations PLAY/REC total hours are displayed on the screen. Refer to the "PREVENTIVE CHECKS AND SERVICE INTERVALS" (CONFIRMATION OF HOURS USED). Can be checked of the INITIAL DATA of MEMORY IC. Refer to the "NOTE FOR THE REPLACING OF MEMORY IC". Adjust the SWITHCHING POINT automatically. Refer to the "ELECTRICAL ADJUSTMENT" (SWITHCHING POINT). Initialization of the factory on VCR. NOTE: Do not use this for the normal servicing. If you set a factory initialization, the memories are reset such as the clock setting, the channel setting, and PLAY/REC total hours.
CH UP
FF
2
CH UP
STOP
2
CH UP
PLAY
2
Set Key
Remocon Key
Standard Time (seconds)
Operations Initialization of the factory on DVD. NOTE: The function will only work without the setting of DVD disc at DVD mode. Do not use this for the normal servicing. DVD Write mode. Refer to the "UP-DATE FOR THE FIRMWARE". NOTE: The function will only work at the DVD stop mode. Do not use this for the normal servicing. Check for the firmware version. Refer to the "CHECK FOR THE FIRMWARE VERSION". NOTE: The function will only work at the DVD stop mode. Do not use this for the normal servicing. Releasing of PARENTAL LOCK. Refer to the "PARENTAL CONTROL - RATING LEVEL". NOTE: The function will only work without the setting of DVD disc at DVD mode.
REC
5
2
REC
6
2
STOP
1
3
STOP
7
3
Method Press the ATR button on the remote control for more than 2 seconds during PLAY. Make the short circuit between the test point of SERVICE and the GND.
Operations Adjusting of the Tracking to the center position. Refer to the "MECHANICAL ADJUSTMENT" (GUIDE ROLLER) and "ELECTRICAL ADJUSTMENT" (SWITHCHING POINT). The BOT, EOT, and the Reel Sensor do not work and the VCR deck can be operated without a cassette tape. Refer to the "PREPARATION FOR SERVICING"
1-13
WHEN REPLACING EEPROM (MEMORY) IC
If a service repair is undertaken where it has been required to change the MEMORY IC, the following steps should be taken to ensure correct data settings while making reference to TABLE 1. NOTE: No need setting for after INI 2D. INI 00 10 20 +0 0A AF 29 +1 A0 97 01 +2 CA 95 15 +3 10 8A 77 +4 64 40 61 +5 64 55 31 +6 4A 31 29 +7 86 04 04 Table 1 1. Connect the set to TV Monitor. 2. Turn on the POWER. 3. Press both CH UP button on the set and the FF button on the set for more than 2 seconds. ADDRESS and DATA will appear on TV Monitor as Fig 1.
ADDRESS DATA
+8 0B 24 00
+9 2F A5 00
+A 86 9F 00
+B 2F 3A 00
+C 0A 00 A2
+D 08 10 B0
+E 0A BF ---
+F 0F 00 ---
INIT 00 C2 PLAY/REC 0000
Fig. 1 4. ADDRESS is now selected and should "blink". Using the SET + or - button on the remote, step through the ADDRESS until required ADDRESS to be changed is reached. 5. Press ENTER to select DATA. When DATA is selected, it will "blink". 6. Again, step through the DATA using SET + or - button until required DATA value has been selected. 7. Pressing ENTER will take you back to ADDRESS for further selection if necessary. 8. Repeat steps 4 to 7 until all data has been checked. 9. When satisfied correct DATA has been entered, turn POWER off (return to STANDBY MODE) to finish DATA input. The unit will now have the correct DATA for the new MEMORY IC.
PARENTAL CONTROL - RATING LEVEL
4 DIGIT PASSWORD CANCELLATION
If the stored 4 digit password in the Rating Level menu needs to be cancelled, please follow the steps below. 1. 2. 3. 4. 5. 6. 7. 8. Ensure the DVD Set is connected to the TV. Turn Unit ON. Confirm that no sisc on the disc tray. Press and hold the '7' key on the remote control unit. Simultaneously press and hold the 'STOP' key on the front panel. Hold both keys for more than 3 seconds. The On Screen Display message 'INITIALIZED' will appear. The 4 digit password has now been cleared.
NB: The above procedure will reset ALL of the player's settings to the default factory state.
1-14
PREVENTIVE CHECKS AND SERVICE INTERVALS
The following standard table depends on environmental conditions and usage. Parts replacing time does not mean the life span for individual parts. Also, long term storage or misuse may cause transformation and aging of rubber parts. The following list means standard hours, so the checking hours depends on the conditions. Time Parts Name Audio Control Head Full Erase Head (Recorder only) Capstan Belt Pinch Roller Capstan DD Unit Loading Motor Tension Band T Brake Band Clutch Ass'y Idler Arm Ass'y Capstan Shaft Tape Running Guide Post Cylinder Unit : Clean : Check it and if necessary, replace it. Replace when rolling becomes abnormal. Clean the Head Clean those parts in contact with the tape.
Clean the rubber, and parts which the rubber touches.
500 hours
1,000 hours
1,500 hours
2,000 hours
3,000 hours
Notes
CONFIRMATION OF HOURS USED
PLAY/REC total hours can be checked on the screen. Total hours are displayed in 16 system of notation. NOTE: If you set a factory initialization, the total hours is reset to "0". 1. 2. 3. 4. Connect the set to TV Monitor. Turn on the POWER. Press both CH UP button on the set and the FF button on the set for more than 2 seconds. After the confirmation of using hours, turn off the power.
INIT 00 C2 PLAY/REC 0000
Initial setting content of MEMORY IC. PLAY/REC total hours. = (16 x 16 x 16 x thousands digit value) + (16 x 16 x hundreds digit value) + (16 x tens digit value) + (ones digit value)
1-15
PREVENTIVE CHECKS AND SERVICE INTERVALS
CLEANING
NOTE After cleaning the heads with isopropyl alcohol, do not run a tape until the heads dry completely. If the heads are not completely dry and alcohol gets on the tape, damage may occur. 1. AUDIO CONTROL HEAD Clean the Audio Control Head with the cotton stick soaked by alcohol. Clean the full erase head in the same manner. (Refer to the figure below.) 2. TAPE RUNNING SYSTEM When cleaning the tape transport system, use the gauze moistened with isopropyl alcohol. 3. CYLINDER Wrap a piece of chamois around your finger. Dip it in isopropyl alcohol. Hold it to the cylinder head softly. Turn the cylinder head counterclockwise to clean it (in the direction of the arrow). (Refer to the figure below.) NOTE Do not exert force against the cylinder head. Do not move the chamois upward or downward on the head. Use the chamois one by one.
Audio Control Head Cylinder Head
1-16
PECULUIAR SERVICE
1. DVD SECTION
DISC REMOVAL METHOD AT NO POWER SUPPLY 1. Remove the Top Cabinet and Front Cabinet. (Refer to item 1 of the DISASSEMBLY INSTRUCTIONS.) 2. Rotate the white gear of Deck CD section in the direction of the arrow by hand, remove the disc from Deck CD. (Refer to Fig. 3-1)
Gear (White)
Deck CD
Fig. 3-1
1-17
ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE (WIRING CONNECTION)
AC IN
POWER PCB
CP502
CP503
OS8001
CD502
J8001 TP8001
J8008
J8006
CP101 TP3001 TU301
J8009
J8007
CD503
DECK CD
CP1701 CP8001
CD 102
A/C HEAD
CP8002 CP651
TP3002 TP101
CD4002
CD4001
CD8002
J8003
J8004
J8005
CD651
V651
CD8501
VCR MT PCB
CP8502 CP4001 CP4002
CP681
OPERATION PCB
MPEG PCB
1-18
PECULUIAR SERVICE
2. VHS SECTION
SERVICING FIXTURES AND TOOLS VHS Alignment Tape MHP & MHP-L Torque Gauge PUJ48075-2 Roller Driver PTU94002-2 X-JG153 X Value Adjustment Screwdriver
Torque Tape
Short Jumper
MECHANISM ADJUSTMENT PARTS LOCATION GUIDE
4 5
6 3
2
7
1
10
9 6. 7. 8. 9. 10.
8 P4 Post T Brake Spring T Reel S Reel Adjusting section for the Tension Arm position
1. Tension Connect 2. Tension Arm 3. Guide Roller 4. Audio/Control Head 5. X value adjustment driver hole
1-19
MECHANICAL ADJUSTMENTS
TAPE REMOVAL METHOD AT NO POWER SUPPLY
1. Remove the Top Cabinet, Front Cabinet, DVD Block, Power PCB and Center Angle and the Fig. A below can be seen. (Refer to item 1 of the DISASSEMBLY INSTRUCTIONS.) 2. Remove the screw 1 of the VCR Deck and remove the Loading Motor. (Refer to Fig. B) 3. Rotate the Pinch Roller Cam in the direction of the arrow by hand to slacken the Video Tape. 4. Rotate the Clutch Ass'y either of the derections to wind the Video Tape in the Cassette Case. 5. Repeat the above step 3~4. Then take out the Video Cassette from the Deck Chassis. Be careful not to scratch on the tape.
1. CONFIRMATION AND ADJUSTMENT
Read the following NOTES before starting work. · Place an object which weighs between 450g~500g on the Cassette Tape to keep it steady when you want to make the tape run without the Cassette Holder. (Do not place an object which weighs over 500g.)
1-1: CONFIRMATION AND ADJUSTMENT OF TENSION POST POSITION 1. Set to the PLAY mode. 2. Adjust the adjusting section for the Tension Arm position so that the Tension Arm top is within the standard line of Main Chassis. 3. While turning the S Reel clockwise, confirm that the edge of the Tension Arm is located in the position described above.
Standard line of Main Chassis
Tension Arm
0.5mm (Adjusting range)
Fig. 1-1-A
Adjusting section for the Tension Arm position
Fig. A
Tension Band
Loading Motor Screw 1
The Tension Arm top will move to the inside direction of the Main Chassis. Bend The Tension Arm top will move to the outside direction of the Main Chassis.
Capstan DD Unit Pinch Roller Cam
Fig. 1-1-B
Main Cam Clutch Ass'y
1-2: CONFIRMATION OF PLAYBACK TORQUE AND BACK TENSION TORQUE DURING PLAYBACK 1. After confirmation and adjustment of Tension Post position (Refer to item 1-2), load the cassette type torque tape and set to the PLAY mode. 2. Confirm that the right meter of the torque tape indicates 50~90gf·cm during playback in SP mode. 3. Confirm that the left meter of the torque tape indicates 25~40gf·cm during playback in SP mode. 1-3: CONFIRMATION OF VSR TORQUE 1. Install the Torque Gauge on the S Reel. Set to the Picture Search (Rewind) mode. (Refer to Fig.1-4-B) 2. Then, confirm that it indicates 120~180gf·cm. NOTE Install the Torque Gauge on the reel disk firmly. Press the REW button to turn the reel disk.
Main Chassis (Front Side)
Fig. B
1-20
MECHANICAL ADJUSTMENTS
1-4: CONFIRMATION OF REEL BRAKE TORQUE (S Reel Brake) (Refer to Fig. 1-4-B) 1. Once set to the Fast Forward mode then set to the Stop mode. While, unplug the AC cord when the Pinch Roller Block is on the position of Fig. 1-4-A. 2. Move the Idler Ass'y from the S Reel. 3. Install the Torque Gauge on the S Reel. Turn the Torque Gauge clockwise. 4. Then, confirm that it indicates 60~100gf·cm. (T Reel Brake) (Refer to Fig. 1-4-B) 1. Once set to the Fast Forward mode then set to the Stop mode. While, unplug the AC cord when the Pinch Roller Block is on the position of Fig. 1-4-A. 2. Move the Idler Ass'y from the T Reel. 3. Install the Torque Gauge on the T reel. Turn the Torque Gauge counterclockwise. 4. Then, confirm that it indicates 30~50gf·cm.
The position at FF mode. Pinch Roller Block Stop at this position.
2. CONFIRMATION AND ADJUSTMENT OF TAPE RUNNING MECHANISM
Tape Running Mechanism is adjusted precisely at the factory. Adjustment is not necessary as usual. When you replace the parts of the tape running mechanism because of long term usage or failure, the confirmation and adjustment are necessary. 2-1: GUIDE ROLLER 1. Playback the VHS Alignment Tape (MHP). 2. Connect CH-1 of the oscilloscope to TP101 (Envelope) and CH-2 to TP3002 (SW Pulse). 3. Press and hold the Tracking-Auto button on the remote control more than 2 seconds to set tracking to center. 4. Trigger with SW Pulse and observe the envelope. (Refer to Fig. 2-1-A) 5. When observing the envelope, adjust the Roller Driver (PTU94002) slightly until the envelope will be flat. Even if you press the Tracking Button, adjust so that flatness is not moved so much. (Refer to Fig. 2-1-B) 6. Adjust so that the A : B ratio is better than 3 : 2 as shown in Fig. 2-1-C, even if you press the Tracking Button to move the envelope (The envelope waveform will begin to decrease when you press the Tracking Button). 7. Adjust the PG shifter during playback. (Refer to the ELECTRICAL ADJUSTMENTS) NOTE After adjustment, confirm and adjust A/C head. (Refer to item 2-2)
CH-1 Envelope (TP101) CH-1 Track CH-2 Track
Cassette Opener The position at STOP mode. Capstan DD Unit
Cassette Holder Ass'y
Fig. 1-4-A
Torque Gauge
Torque Gauge
CH-2 SW Pulse (TP3002)
Fig. 2-1-A
Improper Proper
S Reel
(a) Guide roller
T Reel
Fig. 1-4-B
NOTE If the torque is out of the range, replace the following parts.
(b) Guide pole
Fig. 2-1-B
Exit
Check item 1-3 1-4
Replacement Part Idler Ass'y/Clutch Ass'y S Reel side: S Reel/Tension Band/Tension Connect/Tension Arm Ass'y T Reel side: T Reel/T Brake Band//T Brake Spring/T Brake Arm
Max
Entrance
A
B
Max
A : B3 : 2
Fig. 2-1-C
1-21
MECHANICAL ADJUSTMENTS
2-2: CONFIRMATION AND ADJUSTMENT OF AUDIO/ CONTROL HEAD When the Tape Running Mechanism does not work well, adjust the following items. 1. Playback the VHS Alignment Tape (MHP). 2. Confirm that the reflected picture of stamp mark is appeared on the tape prior to P4 Post as shown in Fig. 22-A. a) When the reflected picture is distorted, turn the screw 1 clockwise until the distortion is disappeared. b) When the reflected picture is not distorted, turn the screw 1 counterclockwise until little distortion is appeared, then adjust the a). 3. Turn the screw 2 to set the audio level to maximum. 4. Confirm that the bottom of the Audio/ Control Head and the bottom of the tape is shown in Fig. 2-2-C. c) When the height is not correct, turn the screw 3 to adjust the height. Then, adjust the 1~3 again.
Audio/Control Head Reflected picture of Stamp Mark P4 Cap
2-3: TAPE RUNNING ADJUSTMENT (X VALUE ADJUSTMENT) 1. Confirm and adjust the position of the Tension Post. (Refer to item 1-1) 2. Adjust the Guide Roller. (Refer to item 2-1) 3. Confirm and adjust the Audio/Control Head. (Refer to item 2-2) 4. Connect CH-1 of the oscilloscope to TP3002, CH-2 to TP101 and CH-3 to HOT side of Audio Out Jack. 5. Playback the VHS Alignment Tape (MHP). 6. Press and hold the Tracking-Auto button on the remote control more than 2 seconds to set tracking to center. 7. Set the X Value adjustment driver (X-JG153) to the 4 of Fig. 2-2-B. At first, turn the Audio/Control Head position fully toward the capstan side. Then adjust X Value to turn it back gradually toward the cylinder side and stop on the second peak point position of the envelope.
Play MHP
Waveform output
Play MHP-L
X-value adjustment point
Drum side
Control head position
Capstan side
Stamp Mark
Fig. 2-2-A
Maximum
Fig. 2-3
Audio/Control Head
3
1
8. Perform tracking operation and confirm the envelope is maximum on the tracking center position. 9. Playback the VHS Alignment Tape (MHP-L). 10. Perform tracking operation and confirm the envelope is maximum on the tracking center position. If envelop is not maximum, should be fine-tune the X-VALUE.
2 4
Fig. 2-2-B
Audio/Control Head Tape
0.25±0.05mm
Fig. 2-2-C
1-22
ELECTRICAL ADJUSTMENTS
Read and perform this adjustment when repairing the circuits or replacing electrical parts or PCB assemblies.
CH-2
1. BASIC ADJUSTMENT
1-1: SWITCHING POINT CONDITIONS MODE-PLAYBACK Input Signal-Alignment Tape (MHP) INSTRUCTIONS 1. Connect CH-1 on the oscilloscope to TP3002 and CH-2 to TP8001. 2. Playback the alignment tape. (MHP) 3. Press and hold the Tracking-Auto button on the remote control more than 2 seconds to set tracking to center. 4. Press both CH UP button on the set and the STOP button on the set for more than 2 seconds.
CH-2 6.5H CH-1
Fig. 1-1-A
CH-1 6.5H
Fig. 1-1-B
ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE
J8001 J8008 J8006 J8009 J8007 OS8001 TP8001
TP101 : Envelope TP3001 : Service Mode TP3002 : Switching Pulse TP8001 : Switching Point
TP3001 TU301
TP101 TP3002
VCR MT PCB
J8003 J8004 J8005 V651
1-23
IC DESCRIPTIONS
SYSCON PCB OEC0110A (IC3001)
No. 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 PORT SVSS CTL_REF CTL-H(+) CTL-H(-) CTL_BIAS CTL_FB CTL_AMP(O) CTL_AMP(I) CFG SVCC AFC_PC AFC_OSC AFC_LPF CSYN/HSYN VLPF/VSYN CV_IN2 CV_IN1 OSD VCC CV_OUT OSD_VSS 4/2 FSC_OUT 4/2 FSC_IN AVSS AN-B AN-A AN-9 AN8 P07/AN7 P06/AN6 P05/AN5 P04/AN4 P03/AN3 P02/AN2 P01/AN1 P00/AN0 AVCC P10/IRQ0 P11/IRQ1 P12/IRQ2 PIN NAME SVSS CTL_REF CTL-H(+) CTL-H(-) CTL_BIAS CTL_FB CTL_AMP(O) CTL_AMP(I) CFG SVCC AFC_PC AFC_OSC AFC_LPF CSYNC VSYNC CV_IN2 CV_IN1 OSDVCC CV_OUT OSD_VSS 4/2 FSC_OUT 4/2 FSC_IN AVSS VIDEO_ENV BOT-H EOT-H MS_SEN-B MS_SEN-A KEY-B KEY-A STEREO_SEL HI-FI_ENV AFT-S_CURVE SERVICE TAB SW AVCC POWER_FAIL CFG IN2 NC OUT IN IN IN OUT OUT IN IN IN IN IN IN IN IN IN IN IN IN IN IN IN IN Input terminal for the judgement of voice reception condition. Input terminal of HiFi RF envelope. AFT S CURVE input for tuner. Input terminal for Service Mode. Input terminal for judge the tape if it has TAB or not. ON/OFF control Micon AD section. Input terminal of Power fail signal. Input terminal for CAPSTAN FG signal detection. Not used.(for FZTAT) Main unit key input. I/O Ground. Output terminal for CTL amp REF (1/2 SVCC) Input and output terminal of Control Head. Input terminal of Control Head. Output terminal for bias. Input terminal for CTL feedback Output terminal for amp out. Input terminal for CTL shumit amp . Input terminal for CAPSTAN FG signal detection. + 5V (Servo) AFC oscilator (external circuit). AFC oscilator (external circuit). LPF connection for AFC OSC. Output terminal for composite SYNC. Input terminal for composite SYNC.(from 14pin) Composite Video input terminal.(for data slicer) Composite Video input terminal.(for OSD) + 5V Composite Video output.(with OSD) Ground. 2 FSC pulse. 2 FSC pulse. Ground. Input terminal of video RF envelope. Tape start sensor input signal. Tape end sensor input signal. Input terminal of mecha state sensor. DESCRIPTION
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IC DESCRIPTIONS
SYSCON PCB OEC0110A (IC3001)
No. 40 41 42 43 44 45 46 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 PORT P13/IRQ3 P14/IRQ4 P15/IRQ5 P16/IC P17/TMOW P67/RP7/TMB P66/RP6/ADTRG P65/RP5 P64/RP4 P63/RP3 P62/RP2 P61/RP1 P60/RP0 P37/TM0 P36/BUZZ P35 VCC VSS P27 P26 P25 P24/SCL1 P23/SDA1 P22/SCK1 P21/SO1 P20/SI1 P47/RPTRG P46/FTOB P45/FTOA P44/FTID P43/FTIC P42/FTIB P41/FTIA P40/PWM14 FEW X2 X1 /RESET PIN NAME VIDEO_MUTE POWER_ON_L POWER ON-H REM_IN DVD RESET NC DVD LED VCR LED GRID1 GRID2 GRID3 GRID4 GRID5 Y/C CLOCK Y/C DATA SEG1 VCC VSS SEG2 SEG3 SEG4 IIC CLK IIC DATA SEG5 TX RX SEG6 SEG7 SEG8 REEL-S REEL-T SEG9 JUST_CLOCK SEG10 FEW X2 X1 /RESET I/O OUT OUT OUT IN OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT DESCRIPTION H for at AUTO_CLOCK in POWER OFF. L for except above case. For control the user power switch ON/OFF. For control the user power switch ON/OFF. Receive the remote control signal. For control the DVD RESET. Not used. The DVD LED light-up/put-off control output. The VCR LED light-up/put-off control output. LEM(LED Module) control terminal. LEM(LED Module) control terminal. LEM(LED Module) control terminal. LEM(LED Module) control terminal. LEM(LED Module) control terminal. Control terminal for Y/C. (CLOCK). Control terminal for Y/C.(DATA).
OUT/IN LEM(LED Module) control terminal. OUT OUT OUT OUT Power of CPU. Ground. LEM(LED Module) control terminal. LEM(LED Module) control terminal. LEM(LED Module) control terminal. CLOCK terminal for IIC BUS communication.
OUT/IN DATA terminal for IIC BUS communication. OUT OUT IN OUT OUT OUT IN IN OUT IN OUT IN OUT IN IN RESET will be done when the voltage goes to HIGH after the reset signal. LEM(LED Module) control terminal. Input terminal for DVD communication.(asynchronous) Output terminal for DVD communication.(asynchronous) LEM(LED Module) control terminal. LEM(LED Module) control terminal. LEM(LED Module) control terminal. Input terminal of reel sensor supply. Input terminal of reel sensor take up. LEM(LED Module) control terminal. not used. LEM(LED Module) control terminal. FZTAT Write protect. Subclock pulse(32.768KHz)
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IC DESCRIPTIONS
SYSCON PCB OEC0110A (IC3001)
No. 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 PORT OSC1 DVSS OSC2 VCL MD0 P34/PWM2 P33/PWM1 P32/PWM0 P31/SV2 P30/SV1 P70/PPG0 P71/PPG1 P72/PPG2 P73/PPG3 P74/PPG4/RP8 P74/PPG5/RP9 P76/PPG6/RPA P77/RPG7/RPB P80/YCO P81/EXCAP/YBO P82/EXCTL P83/C,ROT/R P84/H.AMP/G P85/COMP/B PIN NAME OSC1 VSS OSC2 VCL MD0 NC CAP_LIMIT T.AUDIO_MUTE TV/VCR POWER_MUTE SURROUND_ON NC NC AV SW_2 AV SW_1 Y/C CS CENTER LED AUDIO_OUT_MUTE V_REC_ST-H LDM CTL CAP_FWD-H C.ROTARY H.AMP.SW COMP I/O IN OUT IN IN OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT IN DESCRIPTION Connect the main crystal(10MHz) Ground. Connect the main crystal(10MHz) Connect the capacitor FZTAT Write MODE. not used. Switch the maximum output current of the Capstan Motor. H for at PLAY in VCR MODE. L for except above case. H for at RF modulator ON. L for except above case. audio mute at POWER ON/OFF. Control the surround IC. Not used. Not used. Control rear/front video signal.(at AV X 2) Control DVD/VCR video/audio signal. Control terminal for Y/C. (CHIP SELECT). The CENTER LED light-up/put-off control output. H for at AUDIO MUTE . L for except above case. On control of A/V recording(Whole width erase) circuit. Loading motor control terminal. Capstan forward and backward command. Color Rotary Control output. Switching output of Head Amp SW. Comparison results input of Playback Envelope level on SP/LP heads (4 heads). 102 P86/EZTTRG CAP_FULL OUT Output the HIGH during the acceleration force of capstan motor at SLOW mode. 103 104 105 106 107 108 109 110 111 112 P87/DPG DFG VIDEO_FF AUDIO_FF DRUM_PWM CAP_PWM V-PULSE SV VSS C.SYNC_IN VCC CYL_SPEED_UP D FG/PG H.SW HI-FI H.SW DRUM_PWM CAP_PWM DUMMY_V-SYNC SV VSS SYNC VCC(SV) OUT IN OUT OUT OUT OUT OUT IN Output terminal for correct cylinder during SLOW. Input terminal for DRUM FG signal detection. Output terminal of Video Head SW. Output terminal of HI-FI Head SW. PWM output of Cylinder control. PWM output of Capastan control. Virtual V Pulse output. Ground. Input terminal for composite SYNC. + 5V
1-26
SERVO TIMING CHART
VCR MT PCB IC3001 (OEC0110A)
DPG 104 PIN
DFG 104 PIN 24 Cycle H. SW. P 105 PIN CH 1 CH 2
V-SYNC (E-E) 111 PIN
REC CTL (REC) 7 PIN V-SYNC (TRICK PB) 109 PIN
· WAVEFORM CHANGES DEPENDED ON THE TAPE SPEED
1-27
MECHANISM TIMING CHART
Please see the list below for the operational timing and the mode sensor output of the main parts on each mechanism modes.
MECHANISM MODE Mode Dealing Directions Revolutional Angle of MAIN CAM Moving Quantity of MAIN ROD (mm) HIGH LOW HIGH LOW
INCLINED BASE S/T UNIT
PRESS
EJECT
STBY
UNLOAD
STOP3
VSR
F.SLOW
PB
STOP2
FF/REW
0
3
15
100
206.3
226.4
255
272.2
303.7
323.8
0
18
21.5
26.5
29.5
35
38.5
MODE SENSOR Output
MS-1
MS-2
PINCH ROLLER BLOCK P5 ARM ASS'Y TENSION LEVER
S BRAKE:LOW
PRESS
(T BRAKE:LOW)
P5-ON (T BRAKE HIGH)
S BRAKE:HIGH
TENSION ARM ASS'Y (S REEL BRAKE) TENSION CONNECT (S REEL BRAKE) T BRAKE ARM (T REEL BRAKE) CLUTCH LEVER
BRAKE-ON
BRAKE-ON
BRAKE-ON BRAKE-ON
CLUTCH-ON
DIRECT
LINK UNIT
UP
PRESS
FLAP LEVER
1-28
TROUBLESHOOTING CUIDE
(VCR SECTION)
POWER DOES NOT TURN ON
NO Does display light? YES
Is the voltage at pin 14 of CP502 about 5.2V?
NO
Check pin 13 of T501 and peripheral circuit.
YES
Check IC3001.
Is there voltage at pin 42 of IC 3001?
YES Check Q506,Q504.
NO
Check IC3001.
1-29
TROUBLESHOOTING CUIDE
THE POWER SUPPLY CUT
Inserting a casette and push play button.
Does the power cut after 3 seconds?
YES
Check CAPSTAN DD UNIT and CYLINDER UNIT.
NO
Does the power cut after about 6 seconds?
YES
Check Q3001,Q3002 and CAPSTAN BELT.
NO
Does intermittently the power cut? NO
YES
Check Q3001,Q3002,IC3001 and sag of CAPSTAN BELT.
Check the POWER BLOCK.
1-30
TROUBLESHOOTING CUIDE
AUDIO SHAKES
Is AUDIO HEAD scratched?
YES Change AUDIO HEAD.
NO
At playback,is input about 4.5Vp-p of a rectangular wave at pin 9 of IC3001? YES
NO
Change CAPSTAN DD UNIT.
At playback,is pin 5 of CP3001 3.5V?
NO
Check IC3001.
YES
Check AUDIO BLOCK.
1-31
TROUBLESHOOTING CUIDE
The CASSETTE TAPE CAN NOT BE INSERTED
Does WORM GEAR of cassette loading block move? YES
NO
Check WORM GEAR of cassette loading block.
When a CASSETTE can not inserted,is pin 25 of IC3001 5V ? YES
NO
Check LED of DECK, PHOTO SENSOR.
When a CASSETTE is inserted,is pin 8 of CP3001 12.6V ? NO
YES
Change LOADING MOTOR.
When a CASSETTE is inserted,is pin 5 of IC3001 5V ? YES
NO
Change IC3001.
Check circuit of loading motor.
1-32
TROUBLESHOOTING CUIDE
When inserting a CASSETTE, it ejects immediately.
Does another CASSETTE insert?
NO
Defective CASSETTE or cassette loading block.
YES
Does SW3001 and REC LEVER correctly set ? YES
NO
Correctly SW3001 and REC LEVER set.
After inserting CASSETTE,is pin 35 of IC3001 0V ? YES
NO
Check SW3001.
Check IC3001.
1-33
TROUBLESHOOTING CUIDE
Can not FF/REW
At FF/REW,does voltage at pin98 of IC3001 change? YES
NO
Check line of IC3001 at pin29 and pin30.
Check DECK MECHANISM.
WHEN PLAYBACK,FF OR REW MODE IS ACTIVE ,UNIT STOPS IMMEDIATELY
Does CAPSTAN DD MOTOR rotate?
NO
Refer to section "CAPSTAN DD MOTOR NOT ROTAING".
YES
Is there REEL SENSOR PULSE signal at pin 69 and pin 70 of IC3001 YES
NO
Check Q3001 and Q3002
Change IC3001
1-34
TROUBLESHOOTING CUIDE
TAPE loading is ok,but unloads immediately.
Does CYLINDER rotate? YES
NO
Is the voltage at pin 2 of CP502 12.6V ? YES
NO
Check power block.
At play,is the voltage at pin 12 of CP3001 2.6V ? YES
NO
Change CYLINDER unit.
NO Is there HEAD SW PULSE at TP3002 YES NO Is PG PULSE signal inputted to pin 104 of IC3001 ? YES
Change IC3001.
Check Q3001 and Q3002
1-35
TROUBLESHOOTING CUIDE
At play,the picture jitters vertical minutely
Is FG wave of CP3001 at pin 11 5V ? 5V YES
NO
Change CYLINDER MOTOR
NO Is pin 12 of CP3001 2.6V ? Change IC3001
YES
Change CYLINDER MOTOR
Auto tracking does not operate
In auto tracking,is the voltage at pin 24 of IC3001 more than DC 0.2V?
NO
Does the CLT pulse signal (about 2.5Vp-p) appear at pin 7 of IC3001. 2.5Vp-p
NO
Check CONTROL HEAD.
YES
YES
CHANGE IC3001
1-36
TROUBLESHOOTING CUIDE
AT PLAY,PICTURE JITTERS HORIZONTALLY
NO
Does a noise on the picture appear?
YES
By adjusting the MANUAL TRACKING UP/DOWN BUTTONS,will the line disappear? YES
NO
Check P/B ENVELOPE.
Is a height of GUIDE POST maximum? YES
NO
The height of GUIDE POST readjust
Is PG SHIFTER adjustment 6.5H?
NO
Adjust PG SHIFTER.
YES
Is a wave of PB-Y unusual?
NO
Change IC101
YES
Change IC1001
1-37
TROUBLESHOOTING CUIDE
AT PLAYBACK,THE PICTUER DOES NOT APPEAR
Does E-E picture appear? YES
NO
Is the voltage of IC101 at pin 44,45,52 and 68 5V? YES
NO
Check POWER BLOCK.
Is there video signal of IC101 at pin 26? YES
NO
Change IC101
Is there video signal of IC8001 at pin 6? YES
NO
Change IC8001
Is there video signal of IC3001 at pin 19? YES
NO
Change IC3001
Check jack J8001
1-38
TROUBLESHOOTING CUIDE
AT PLAYBACK,THE COLOR DOES NOT APPEAR
Is there color signal in video signal at pin 26 of IC101 YES
NO
Is there video signal at pin 26 of IC101 YES
NO
Change X'tal
Check pin 19 of IC3001
Change IC101
NO COLOR DURING SELF RECORDING AND PLAYBACK
Is there CHROMA signal at pin 30,32 of IC101 YES
NO
Check TU301,J8003, circuit around it.
Is there CHROMA signal at pin 26 of IC101 YES
NO Change IC101
Check circuit around of J8001
1-39
TROUBLESHOOTING CUIDE
AT PLAYBACK AND RECORDING, CYLINDER MOTOR UNLOAD
Is the voltage at pin 8 of CP3001 about DC12.6V?
NO
Check at 12.6V line, power block.
YES
In playback,is at pin 12 of CP3001 about DC2.6V?
NO
Check IC3001.
YES
Change CYLINDER MOTOR.
PLAYBACK PICTURE IS NOISY (EVEN AFTER CLEANING HEADS)
Is noisy a wave of video signal at pin 26 of IC101?
NO
Check CYLINDER.
YES
Is noisy a wave of video signal of EMITTER of Q8004
YES
Check Q8004
NO
Check J8001
1-40
TROUBLESHOOTING CUIDE
AT PLAY,AUDIO DOES NOT APPEAR
At E-E,does audio appear?
NO
Refer to section"E-E DOES NOT APPEAR".
YES
Is the voltage at pin 6 of IC101 about 2.5V?
NO
Check C4024 and around circuit of it.
YES
Is there audio signal at pin 10 of IC101?
NO
Check circuit around at pin 10 of IC101.
YES
Is there audio signal at pin 22,24 of IC701?
YES
Check circuit around at pin 22,24 of IC701.
NO
Check whether there are not a damage ,dirt in AUDIO HEAD
1-41
TROUBLESHOOTING CUIDE
THE AUDIO CAN NOT RECORD
Is