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MVT2136A
SERVICE MANUAL
COLOR TELEVISION/VIDEO CASSETTE RECORDER
ORIGINAL MFR'S VERSION A
Design and specifications are subject to change without notice.
SERVICING NOTICES ON CHECKING
1. KEEP THE NOTICES
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.
6. AVOID AN X-RAY
Safety is secured against an X-ray by considering about the cathode-ray tube and the high voltage peripheral circuit, etc. Therefore, when repairing the high voltage peripheral circuit, use the designated parts and make sure not modify the circuit. Repairing except indicates causes rising of high voltage, and it emits an X-ray from the cathoderay tube.
2. AVOID AN ELECTRIC SHOCK
There is a high voltage part inside. Avoid an electric shock while the electric current is flowing.
3. 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.
7. 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.
(INSULATION CHECK PROCEDURE)
4. 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.
5. TAKE CARE TO DEAL WITH THE CATHODE-RAY TUBE
In the condition that an explosion-proof cathoderay tube is set in this equipment, safety is secured against implosion. However, when removing it or serving from backward, it is dangerous to give a shock. Take enough care to deal with it.
1. Unplug the plug from the AC outlet. 2. Remove the antenna terminal on TV and turn on the TV. 3. Insulation resistance between the cord plug terminals and the eternal exposure metal [Note 2] should be more than 1M ohm by using the 500V insulation resistance meter [Note 1]. 4. If the insulation resistance is less than 1M ohm, the inspection repair should be required.
[Note 1]
If you have not the 500V insulation resistance meter, use a Tester.
[Note 2]
External exposure metal: Antenna terminal Earphone jack
HOW TO ORDER PARTS
Please include the following informations when you order parts. (Particularly the VERSION LETTER.) 1. MODEL NUMBER and VERSION LETTER The MODEL NUMBER can be found on the back of each product and the VERSION LETTER can be found at the end of the SERIAL NUMBER. 2. PART NO. and DESCRIPTION You can find it in your SERVICE MANUAL.
A1-1
CONTENTS
SERVICING NOTICES ON CHECKING ..................................................................................... A1-1 HOW TO ORDER PARTS ........................................................................................................... A1-1 CONTENTS ................................................................................................................................. A2-1 GENERAL SPECIFICATIONS .................................................................................................... A3-1~A3-6 DISASSEMBLY INSTRUCTIONS 1. REMOVAL OF MECHANICAL PARTS AND P. C. BOARDS ........................................... B1-1, B1-2 2. REMOVAL OF DECK PARTS ............................................................................................ B2-1~B2-5 3. REMOVAL OF ANODE CAP .............................................................................................. B3-1 KEY TO ABBREVIATIONS ......................................................................................................... C1-1, C1-2 SERVICE MODE LIST ................................................................................................................. C2-1 PREVENTIVE CHECKS AND SERVICE INTERVALS .............................................................. C3-1, C3-2 NOTE FOR THE REPLACING OF MEMORY IC ....................................................................... C4-1 SERVICING FIXTURES AND TOOLS ........................................................................................ C5-1 PREPARATION FOR SERVICING ............................................................................................. C5-1 MECHANICAL ADJUSTMENTS ................................................................................................. D1-1~D1-4 ELECTRICAL ADJUSTMENTS .................................................................................................. D2-1~D2-5 BLOCK DIAGRAMS TV ............................................................................................................................................ E-1, E-2 Y/C/AUDIO/HEAD AMP/IN/OUT ............................................................................................. E-3, E-4 MICON/POWER/OPERATION/DECK ................................................................................... PRINTED CIRCUIT BOARDS OPERATION/DECK ................................................................................................................. F-1, F-2 SYSCON/CRT ......................................................................................................................... F-3~F-6 SCHEMATIC DIAGRAMS Y/C/AUDIO/HEAD AMP ........................................................................................................... G-1, G-2 MICON ..................................................................................................................................... G-3, G-4 IN/OUT ..................................................................................................................................... G-5, G-6 CHROMA/IF ............................................................................................................................ G-7, G-8 SOUND AMP ........................................................................................................................... G-9, G-10 POWER ................................................................................................................................... G-11, G-12 DEFLECTION .......................................................................................................................... G-13, G-14 CRT ......................................................................................................................................... G-15, G-16 OPERATION ........................................................................................................................... G-17, G-18 DECK ....................................................................................................................................... G-19, G-20 INTERCONNECTION DIAGRAM ............................................................................................ G-21, G-22 WAVEFORMS ............................................................................................................................. H-1, H-2 MECHANICAL EXPLODED VIEWS ........................................................................................... I-1, I-2 CHASSIS EXPLODED VIEWS ................................................................................................... I-3, I-4 MECHANICAL REPLACEMENT PARTS LIST .......................................................................... J1-1 CHASSIS REPLACEMENT PARTS LIST .................................................................................. J2-1 ELECTRICAL REPLACEMENT PARTS LIST ........................................................................... J3-1~J3-3 E-5, E-6
A2-1
GENERAL SPECIFICATIONS
G-1.Outline of the Product 13 inch(335.4mmV):Measured diagonally Color CRT 90 degree deflection 3 -Speed 1/2" Video Cassette Recorder VHS VHS-C G-2.VCR Format VHS Standard G-3.Video Recording System Luminance Component Chrominance Component G-4.Broadcasting System G-5.Color System G-6.NTSC Playback(PAL 60Hz) G-7.MESECAM NTSC PAL SECAM VHS Hi-Fi Audio System
Recorder/Player Player PAL-M PAL-N
:Rotary, slant azimuth two head helical scan system :FM recording :Low frequency converted direct recording US NTSC Yes Yes System PAL No No M SECAM or Monochrome signal
G-8.Cassette Tape VHS type video cassette tape Width 12.65mm (1/2 Inch) VHS-C type video cassette tape Width 12.65mm (1/2 Inch) G-9.Tape Speed NTSC or PAL-M SP 33.35 mm/sec LP 16.67 mm/sec SLP 11.12 mm/sec G-10.Recording/Playback Time NTSC or PAL-M at SP Mode Max. at LP Mode Max. at SLP Mode Max. PAL or SECAM at SP Mode Max. at LP Mode Max. G-11.Use Deck OVD-5 OVD-6 OVD-6S (with T-120 cassette) OVD-6S(Vertical) (with E-180 cassette) G-12.Rewind/Fast Forward Time(Approx.) FF:1'48" / Rew:1'48" G-13.Search Speed SP LP SLP G-14.Slow Speed SP LP SLP G-15.Frame Advance SP LP SLP 3 and 5 Times 7 and 9 Times 9 and 15 Times Times Times Times Times Times Times PAL or SECAM SP 23.39 mm/sec LP 11.69 mm/sec
210 min. (with T-210 cassette) 420 min. (with T-210 cassette) 630 min. (with T-210 cassette) 300 min. (with E-300 cassette) 600 min. (with E-300 cassette)
G-16.Antenna Input Impedance VHF/UHF 75 ohm unbalanced
A 3 -1
GENERAL SPECIFICATIONS
G-17.Tuner and Receiving channel Tuner : Contactless Electric tuner Oscar(W/O HYPER) Channel Coverage 2 ~ 69 , 4A Tuning System Frequency syn. G-18.Preset Channel: G-19.Intermediate Frequency Picture(FP) Sound (FS) FP-FS G-20.Stereo/Dual TV Sound Yes( NICAM G-21.Video Signal Input Level Output Level S/N Ratio Horizontal Resolution G-22.Audio Signal Input Level Line RCA Output Level Line RCA S/N Ratio at SP Mode Harmonic Distortion : Frequency Response : Oscar(W/ HYPER) , A-5 ~ A-1 , Voltage syn. A~I , France CATV) J~W , Others 1Tuner System 2Tuner System
W+1~ W+84
Others
-- channels 45.75 MHz 41.25 MHz 4.50 MHz GERMAN MHz MHz MHz USA JAPAN) MHz MHz MHz No
1 Vp-p / 75 ohm -- Vp-p / -- ohm 50 dB (Weighted) at SP Mode 220 Lines
-- 8 ---
dB / dB / dB / dB / 38 1.5
-Kohm 50 Kohm --Kohm Kohm
(0dB=0.775 V rms) dB % (1KHz) at SP at LP at SLP Mode Mode Mode 100 100 100 Hz ~ Hz ~ Hz ~ 10 6 4 KHz KHz KHz
Hi-Fi Audio Signal NONE Depth Multiplex Recording Rotary, Slant Azimuth Two Head System Helical Scan System Dynamic Range : More than -- dB Wow And Flutter : Less than -- % Wrms Channel Separation : More than -- dB Harmonic Distortion : Less than -- % G-23.Heads Video FM Audio Audio / Control Erase G-24.Motor: 3 Motors Tape/Cassette Loading Cylinder (Direct Drive) Capstan (Direct Drive) 2 1 1 Rotary Heads Rotary Heads Stationary Head ( Full Track Erase Mono Stereo(L,R) )
A 3 -2
GENERAL SPECIFICATIONS
G-25.Power Source 120 V EXT DC Jack G-26.Power Consumption: Stand by: Per Year: G-27.Dimensions(Approx.) 362 mm(W) 370.5 G-28.Weight(Approx.) G-29.Cabinet Material Cabinet Front: Net : Gross: -AC 50Hz V AC 60Hz 60 60 Hz Hz
70 W at AC 120 V -- W at DC --V (at TV and VCR ON) 5 W at AC 120 V -- kWh / Year mm(D) 382 mm(H)
12.5 Kg ( 27.6 lbs) 14.5 Kg ( 32.2 lbs) PS ABS PS ABS 94HB 94V2 94V0 94HB 94V2 94V0 DECABROM NON-DECA DECABROM NON-DECA
Cabinet Rear:
G-30.Cassette Loading System: G-31.Tape Counter: G-32.Protector: G-33.Regulation Safety UL BS SEMKO NOM Radiation FCC SABA CNS X- Radiation DHHS G-34.Temperature Operation Storage G-35.Operating Humidity
Front Cassette Loading System Top Loading System
Linear Time Tape Counter Power Fuse Dew Sensor
CSA NF NZ AS3159 DOC SI CISPR13 HWC 5 -20 ºC ~ ºC ~
SAA NEMKO HOMOLO DENTORI FTZ NF DENTORI PTB 40 ºC 60 ºC 80
SI FEMKO SABS UNE PTT NZ AS/NZS DENTORI
CE DEMKO CNS GOST CE HOMOLO NONE NONE
SEV IEC65 SISIR NONE SEV UNE
Less than
%RH
G-36.Clockand Timer Calendar: 1990/1/1~ 2081/12/31 Built-in 1 Month 8 Events Programmable Timer One Touch Recording : Max Time 5 Hours Sleep Timer Yes Max 120 Min.( 10 Min. Step) On/Off Timer Yes 1 Programs Wake Up Timer Yes Programs G-37.Timer back up Time More than 1/12 Minutes (at Power Off Mode)
No No No
A 3 -3
GENERAL SPECIFICATIONS
G-38.Terminals VHF/UHF Antenna Input Front Video Input (RCA ø8.3) Front Audio Input (RCA ø8.3) Rear Video Input Rear Audio Input (RCA ø8.3) (RCA ø8.3) Din Type F-Type France Type
Rear Video Output (RCA ø8.3) Rear Audio Output (RCA ø8.3) 21 Pin DC Jack 12V (Center +) AC Inlet Ext Speaker Diversity Ear Phone Head Phone(Mono & Stereo, ø3.5) G-39.Indicator Power Stand By (Red) ( ) On Timer OTPB ( ) ( ) G-40.On Screen Display Menu Timer Rec Set Ch Set Up TV Set Up Rec/Otr (Red) T-Rec (Red) ( Tape In )
TV/CATV Add/Delete V-Chip Set Picture Sap On/Off
Auto Ch Memory Guide Ch Set On/Off Timer Audio
Clock Set( Calendar Language Standard Time G-CODE(or SHOWVIEW or PLUSCODE)No. Entry Clock/Date CH/AV Tape Counter Tape Speed Sleep Time Tape In Control Level (Vol, Bright, Cont, Color, Tint, Sharpness) Control Level (Vol, Bright, Cont, Color, Sharpness) Play/Stop/FF/Rew/Rec/OTR/T-Rec/Pause/Eject(Symbol Mark) Auto Tracking/Manual Tracking Caption/Text 1/2 Index Repeat Add/Delete Stereo/SAP Muting G-41.OSD Language Eng Ger Fre Fre Spa Spa Ita Ita Por Por
Auto Repeat On/Off System Set Up
12H 24H) Auto Clock On/Off Daylight Saving Time
Jan Jan
OSD Language Setting Eng Ger Not Applicable G-42.Speaker Position Size Imp. Output G-43.EXT Speaker:
Front Side 1.5 x 2.5 inches 8 ohm x 1 pcs Max 1.5 W 10% 1.0 W (Typical) Yes -W
Bottom
Imp
--
ohm
No
A 3 -4
GENERAL SPECIFICATIONS
G-44.Carton Master Carton: Need No Need Content: ---- Set Material: ---- / ---Corrugated Carton Dimensions: ---- mm(W) ---- mm(D) ---- mm(H) Description of Origin Yes No Double/Brown Corrugated Carton ( with Photo Label) Double/White Corrugated Carton ( with Photo Label) Double Full Color Carton W/Photo Dimensions: 447 mm(W) 423 mm(D) 443 mm(H) Design: As Per Buyer 's Description of Origin: Yes No Drop Test Natural Dropping At 1 Corner / 3 Edges / 6 Surfaces Height 25cm 31cm 46cm 62cm 80cm Container Stuffing: 700 Sets / 40' container G-45.Accessories Channel Film Dew Caution Sheet Owner's Manual( W/Guarantee Card) [English/French] AC Plug Adapter Remote Control Unit Quick Set-up Sheet Rod Antenna ( One Pole Two Pole/ F-Type DIN Type France Type) Loop Antenna( F-Type DIN Type France Type) U/V Mixer Battery (UM- 4 x 2 ) DC Car Cord (Center+) AC Cord Guarantee Card AV Cord (2Pin-1Pin) Warning Sheet Registration Card Circuit Diagram PTB Sheet Antenna Change Plug 300 ohm to 75 ohm Antenna Plug Service Facility List Euro Warranty Information Sheet Important Safeguard G-46.Other Features Auto Head Cleaning Index Search Auto Tracking Auto Clock VIDEO PLUS+(SHOWVIEW,G-CODE) Auto Shut Off HQ (VHS Standard High Quality) Auto Power On, Auto Play, Auto Rewind, Auto Eject, Auto Power Off Forward / Reverse Picture Search SQPB One Touch Playback CATV Auto CH Memory Just Clock Function Rental Mode Closed Caption TV Monitor CM Skip V-chip( USA Canada) CM Advance Energy Star Dirty Head Warning G-47.Switch Front Power(Tact) Channel Up Volume Up Play Channel Down Volume Down Pause/Still F.FWD/Cue Rew/Rev System Select Eject/Stop Rec/OTR One Touch Playback Main Power SW Rear Color On/Off (SECAM only) Degauss Main Power SW AC/DC Gift Box: Material
A 3 -5
GENERAL SPECIFICATIONS
G-48.Magnetic Field BV : BH : BV : BH : +0.45G 0.18G -0.15G 0.15G BV BH BV BH : : : : +0.35G 0.30G -0.25G 0.15G BV BH BV BH : : : : +0.25G 0.30G -0.50G 0.30G
G-49.Remote Control Unit: RC-CG Glow in Dark Remocon Yes No Power Source: D.C 3 V Battery UM - 4 x 2 Control Key: Total 41 Key 0 1 2 3 4 5 6 7 8 9 Menu Set Up Set Down Enter Cancel Call Muting Sleep Timer Quick View Ch Up Ch Down Volume Up Volume Down Input Select Audio Select TV/VCR Pause/Still Slow Slow Speed Up Slow Speed Down Skip Search Speed TV Monitor Index Program Video Plus Program/Video Plus Power Eject Play Stop F.FWD Rew Timer Rec REC/OTR Auto Tracking Tracking Up/Set + Tracking Down/Set Counter Reset Clock/Counter Zero Return One Touch Playback TV/Caption/Text Caption On/Off Caption 1/2
A 3 -6
DISASSEMBLY INSTRUCTIONS
1. REMOVAL OF MECHANICAL PARTS AND P.C. BOARDS
1-1: BACK CABINET (Refer to Fig. 1-1) 1. Remove the 4 screws 1. 2. Remove the screw 2 which are used for holding the Back Cabinet. 3. Remove the AC cord from the AC cord hook 3. 4. Remove the Back Cabinet in the direction of arrow.
Front Cabinet CRT PCB Front Cabinet
1
Fig. 1-2
1
1-3: VCR BLOCK (Refer to Fig. 1-3)
2 1 3
Back Cabinet
1
1. Remove the 2 screws 1. 2. Disconnect the following connectors: (CP757, CP353, CP401 and CP502). 3. Unlock the support 2. 4. Remove the VCR Block in the direction of arrow. Fig. 1-1
1
Front Cabinet
1-2: CRT PCB (Refer to Fig. 1-2) CAUTION: BEFORE REMOVING THE ANODE CAP, DISCHARGE ELECTRICITY BECAUSE IT CONTAINS HIGH VOLTAGE. BEFORE ATTEMPTING TO REMOVE OR REPAIR ANY PCB, UNPLUG THE POWER CORD FROM THE AC SOURCE. 1. Remove the Anode Cap. (Refer to REMOVAL OF ANODE CAP) 2. Disconnect the following connector: (CP801). 3. Remove the CRT PCB in the direction of arrow.
1
2
UP TO RELEASE
VCR Block
Fig. 1-3
B1-1
DISASSEMBLY INSTRUCTIONS
1-4: DECK SHIELD PLATE, DECK CHASSIS AND BOTTOM SHIELD (Refer to Fig. 1-4) Remove the 3 screws 1. Remove the 3 screws 2. Remove the Deck Shield Plate in the direction of arrow (A). Disconnect the following connectors: (CP1004, CP1005, CP1006, CP4001, CP4002 and CP4003). 5. Remove the Deck Chassis in the direction of arrow (B). 6. Remove the screw 3. 7. Remove the Bottom Shield in the direction of arrow (C). 1. 2. 3. 4.
2
Deck Shield Plate
1-5: SYSCON PCB (Refer to Fig. 1-5) 1. Remove the screw 1. 2. Remove the Syscon PCB in the direction of arrow.
Syscon PCB
1
1 2
2 1 1
(A) Deck Holder
Fig. 1-5
Deck Chassis (B)
Syscon PCB
(C)
Bottom Shield
3
Fig. 1-4
B1-2
DISASSEMBLY INSTRUCTIONS
2. REMOVAL OF DECK PARTS
2-1: TOP BRACKET (Refer to Fig. 2-1) 1. Remove the 2 screws 1. 2. Slide the 2 supports 2 and remove the Top Bracket. NOTE
Tape Guide L
NOTE When you install the Tape Guide L, install as shown in the circle of Fig. 2-3-B. (Refer to Fig. 2-3-B)
When you install the Top Bracket, install the screw (1) first, then install the screw (2).
REC Lever (2)
1
Top Bracket
(1)
1
Top Bracket · The REC Lever is not installed on the Video Cassette Player.
Fig. 2-3-B
2-4: CASSETTE HOLDER ASS'Y (Refer to Fig. 2-4)
2
Main Chassis Main Chassis · Screw Torque: 5 ± 0.5kgf·cm
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. Fig. 2-1
Cassette Side R Main Chassis Locker R
2-2: FLAP LEVER/TAPE GUIDE R (Refer to Fig. 2-2) 1. Move the Cassette Holder Ass'y to the back side. 2. Remove the Polyslider Washer 1. 3. Remove the Flap Lever. 4. Unlock the 3 supports 2 and remove the Tape Guide R.
Tape Guide R Flap Lever Cassette Side L Main Chassis
Fig. 2-4
2
2-5: CASSETTE SIDE L/R (Refer to Fig. 2-5)
2 2 1
Main Chassis
1. Unlock the 4 supports 1 and then remove the Cassette Side L/R. Fig. 2-2 NOTE When you install the Cassette Side R, be sure to move the Locker R after installing.
1 1
2-3: TAPE GUIDE L (Refer to Fig. 2-3-A) 1. Move the Cassette Holder Ass'y to the back side. 2. Unlock the 2 supports 1 and remove the Tape Guide L. 3. Remove the REC Lever. (Recorder only)
REC Lever Locker R Tape Guide L Cassette Side R Cassette Side L
1
1
1
Fig. 2-5
1
Main Chassis · The REC Lever is not installed on the Video Cassette Player.
Fig. 2-3-A
B2-1
DISASSEMBLY INSTRUCTIONS
2-6: LINK ASS'Y (Refer to Fig. 2-6) 1. Set the Link Ass'y to the Eject position. 2. Remove the (A) side of the Link Ass'y first, then remove the (B) side. 2-9: TENSION ASS'Y (Refer to Fig. 2-9-A) 1. Move the Inclined S Ass'y to the back side. 2. Remove the Tension Spring. 3. Unlock the support 1 and remove the Tension Arm Ass'y. 4. Remove the Tension Adjust. 5. Unlock the 2 supports 2 and remove the Tension Band Ass'y. 6. Unlock the support 3 and remove the Tension Holder. 7. Remove the SS Brake Spring. 8. Remove the SS Arm Brake.
Tension Adjust (B) (A) Link Ass'y
Link Ass'y
2 2
Main Chassis
Tension Band Ass'y
Main Chassis
Fig. 2-6
Tension Spring Tension Arm Ass'y
2-7: LOADING MOTOR ASS'Y (Refer to Fig. 2-7) 1. Remove the Link Lever. 2. Remove the Dumper Spring. 3. Remove the 2 screws 1. 4. Unlock the support 2 and remove the Loading Motor Ass'y. 5. Unlock the 2 supports 3 and remove the Deck PCB (BOT).
1
Loading Motor Ass'y SS Brake Spring SS Arm Brake
1 3
Tension Holder
Inclined S Ass'y
Fig. 2-9-A NOTE When you install the Tension Adjust, install as shown in Fig. 2-9-B. (Refer to Fig. 2-9-B)
3
Main Chassis Adjust the direction of the Marker to inside.
Dumper Spring
2
1
Deck PCB (BOT) Link Lever
Fig. 2-9-B 2-10: T BRAKE ASS'Y (Refer to Fig. 2-10) 1. Remove the T Brake Spring. 2. Remove the T Brake Ass'y. Fig. 2-7
T Brake Ass'y
· Screw Torque: 5 ± 0.5kgf·cm
2-8: SENSOR COVER L3 (Refer to Fig. 2-8) 1. Unlock the support 1 and remove the Sensor Cover L3.
Main Chassis T Brake Spring Sensor Cover L3
1
Fig. 2-8
Fig. 2-10
B2-2
DISASSEMBLY INSTRUCTIONS
2-11: S REEL/T REEL (Refer to Fig. 2-11) 1. Remove the S Reel and T Reel. 2. Remove the 2 Polyslider Washers 1. 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. 2-11) Do not adhere the stains on it. 5. When you install the reel, clean the shaft and oil it (FL OIL #6115). (If you do not oil, noise may be heard in FF/ REW mode.) 6. After installing the reel, adjust the height of the reel. (Refer to MECHANICAL ADJUSTMENT)
S Reel
NOTE 1. Do not touch the Pinch Roller. (Use gloves.) 2. When you install the Pinch Roller Block, install as shown in the circle of Fig. 2-12-B. (Refer to Fig. 2-12-B)
Fig. 2-12-B 2-13: A/C HEAD (Refer to Fig. 2-13-A) 1. Remove the screw 1. 2. Remove the A/C Head Base. 3. Remove the 3 screws 2. 4. Remove the A/C Head and A/C Head Spring. NOTE
(A)
1
T Reel
(A)
1
1. Do not touch the A/C Head. (Use gloves.) 2. When you install the A/C Head Spring, install as shown in Fig. 2-13-B. (Refer to Fig. 2-13-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)
2
2
Fig. 2-11 2-12: PINCH ROLLER BLOCK/P5-3 ARM ASS'Y (Refer to Fig. 2-12-A) 1. Remove the P5 Spring. 2. Remove the screw 1. 3. Unlock the 2 supports 2 and remove the Cassette Opener. 4. Remove the Pinch Roller Block, Pinch Roller Arm Spring, Pinch Roller Lever Ass'y and P5-3 Arm Ass'y.
1
P5 Spring
2
(2) A/C Head
A/C Head Spring
1
A/C Head Base · Screw Torque: 4 ± 0.5kgf·cm (Screw 1)
Fig. 2-13-A
2
Cassette Opener
2
P5-3 Arm Ass'y Pinch Roller Block Pinch Roller Arm Spring Pinch Roller Lever Ass'y Spring Position
Fig. 2-13-B
2-14: FE HEAD (RECORDER ONLY) (Refer to Fig. 2-14) 1. Remove the screw 1. 2. Remove the FE Head.
1
FE Head
Main Chassis
· Screw Torque: 5 ± 0.5kgf·cm
Fig. 2-12-A
· The FE Head is not installed on the Video Cassette Player. · Screw Torque: 4 ± 0.5kgf·cm
Fig. 2-14
B2-3
DISASSEMBLY INSTRUCTIONS
2-15: AHC ASS'Y/CYLINDER UNIT ASS'Y (Refer to Fig. 2-15) 1. Unlock the support 1 and remove the AHC Ass'y. 2. Remove the 3 screws 2. 3. Remove the Cylinder Unit Ass'y. NOTE 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.
Pinch Roller Cam E-Ring Main Cam
1
Middle Gear
2
Joint Gear P5 Cam
AHC Ass'y
Fig. 2-17-A
Cylinder Unit Ass'y
1
NOTE When you install the Pinch Roller Cam, P5 Cam and Main Cam, align each marker. (Refer to Fig. 2-17-B)
Pinch Roller Cam
Check the hole of Main Chassis can be seen.
P5 Cam
2 (1)
(2) 2 · Screw Torque: 3 ± 0.5kgf·cm
2
(3)
Fig. 2-15
Marker
Main Cam
2-16: CAPSTAN DD UNIT (Refer to Fig. 2-16) 1. Remove the Capstan Belt. 2. Remove the 3 screws 1. 3. Remove the Capstan DD Unit. Fig. 2-17-B
Capstan Belt Capstan DD Unit
2-18: CLUTCH ASS'Y (Refer to Fig. 2-18) 1. Remove the Polyslider Washer 1. 2. Remove the Clutch Ass'y, Ring Spring and Coupling Gear. 3. Unlock the 2 supports 2 and remove the Clutch Lever.
1
1
· Screw Torque: 5 ± 0.5kgf·cm
1 1
Clutch Ass'y
Fig. 2-16
Ring Spring
2-17: MIDDLE GEAR/MAIN CAM (Refer to Fig. 2-17-A) 1. Remove the Polyslider Washer 1, then remove the Middle Gear. 2. Remove the E-Ring, then remove the Main Cam, P5 Cam and Pinch Roller Cam. 3. Remove the Polyslider Washer 2, then remove the Joint Gear.
Coupling Gear
2
Clutch Lever
2
Fig. 2-18
B2-4
DISASSEMBLY INSTRUCTIONS
2-19: LOADING GEAR S/T ASS'Y (Refer to Fig. 2-19-A) 1. Remove the E-Ring 1 and remove the Main Loading Gear. 2. Remove the Capstan Brake Spring. 3. Slide the Main Rod and remove the Capstan Brake Ass'y. 4. Remove the Main Rod, Tension Lever, Clutch Actuator, Idler Arm Ass'y. 5. Remove the screw 2. 6. Remove the LED Reflecter. 7. Remove the Loading Arm S Ass'y and Loading Arm T Ass'y. 8. Remove the Loading Gear S and Loading Gear T. 9. Remove the Loading Gear Spring.
Capstan Brake Spring Capstan Brake Ass'y
2. When you install the Clutch Actuator, install as shown in the circle of Fig. 2-19-C. (Refer to Fig. 2-19-C)
Clutch Actuator
Fig. 2-19-C 2-20: INCLINED S/T ASS'Y (Refer to Fig. 2-20) 1. Unlock the support 1 and remove the P4 Cover. 2. Remove the screw 2. 3. Unlock the support 3 and remove the Loading Gear Holder. 4. Remove the Inclined S. 5. Remove the Inclined T. 6. Remove the 2 screws 4, then remove the Guide Roller. NOTE Do not touch the roller of Guide Roller.
2
Loading Gear Holder
1
Main Loading Gear Main Rod
Tension Lever Loading Gear T Idler Arm Ass'y
LED Reflecter
2
Loading Gear Spring Loading Arm T Ass'y Loading Gear S
Clutch Actuator
Loading Gear Spring
Guide Roller
3
Loading Arm S Ass'y Inclined S
4
Guide Roller
4
· Screw Torque: 5 ± 0.5kgf·cm
Fig. 2-19-A
1
Inclined T P4 Cover
NOTES 1. When you install the Loading Arm S Ass'y, Loading Arm T Ass'y and Main Loading Gear, align each marker. (Refer to Fig. 2-19-B)
Marker
Main Loading Gear
· Screw Torque: 5 ± 0.2kgf·cm (Screw 2) · Screw Torque: 0.7 ± 0.2kgf·cm (Screw 4)
Fig. 2-20
Marker
Loading Arm T Ass'y
Loading Arm S Ass'y
Fig. 2-19-B
B2-5
DISASSEMBLY INSTRUCTIONS
3. REMOVAL OF ANODE CAP
Read the following NOTED items before starting work. 3. After one side is removed, pull in the opposite direction to remove the other. NOTE Take care not to damage the Rubber Cap. INSTALLATION 1. Clean the spot where the cap was located with a small amount of alcohol. (Refer to Fig. 3-3.)
* *
After turning the power off there might still be a potential voltage that is very dangerous. When removing the Anode Cap, make sure to discharge the Anode Cap's potential voltage. Do not use pliers to loosen or tighten the Anode Cap terminal, this may cause the spring to be damaged.
REMOVAL 1. Follow the steps as follows to discharge the Anode Cap. (Refer to Fig. 3-1.) Connect one end of an Alligator Clip to the metal part of a flat-blade screwdriver and the other end to ground. While holding the plastic part of the insulated Screwdriver, touch the support of the Anode with the tip of the Screwdriver. A cracking noise will be heard as the voltage is discharged. Location of Anode Cap
Fig. 3-3 GND on the CRT NOTE Confirm that there is no dirt, dust, etc. at the spot where the cap was located. 2. Arrange the wire of the Anode Cap and make sure the wire is not twisted. 3. Turn over the Rubber Cap. (Refer to Fig. 3-4.)
Screwdriver
CRT Support Alligator Clip
GND on the CRT
Fig. 3-1
Fig. 3-4 4. Insert one end of the Anode Support into the anode button, then the other as shown in Fig. 3-5.
2. Flip up the sides of the Rubber Cap in the direction of the arrow and remove one side of the support. (Refer to Fig. 3-2.) Rubber Cap
CRT Support Fig. 3-2
CRT
Support Fig. 3-5
5. Confirm that the Support is securely connected. 6. Put on the Rubber Cap without moving any parts.
B3-1
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
K L
M
N O P
R
S
C1-1
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
C1-2
SERVICE MODE LIST
This unit provided with the following SERVICE MODES so you can repair, examine and adjust easily. To enter SERVICE MODE, unplug AC cord till lost actual clock time. Then press and hold Vol (-) button of main unit and remocon key simultaneously. The both pressing of set key and remote control key will not be possible if clock has been set. To reset clock, either unplug AC cord and allow at least 5 seconds before Power On. Set Key VOL. (-) MIN Remocon Key 0 Releasing of V-CHIP PASSWORD. Initialization of the factory. NOTE: Do not use this for the normal servicing. Horizontal position adjustment of OSD. NOTE: Also can be adjusted by using the Adjustment MENU. Refer to the "ELECTRICAL ADJUSTMENT" (OSD HORIZONTAL). Adjust the PG SHIFTER automatically. Refer to the "ELECTRICAL ADJUSTMENT" (PG SHIFTER). Adjust the PG SHIFTER manually. Refer to the "ELECTRICAL ADJUSTMENT" (PG SHIFTER). Adjusting of the Tracking to the center position. NOTE: Also can be adjusted by pressing the ATR button for more than 2 seconds during PLAY. POWER ON total hours and PLAY/REC total hours are displayed on the screen. Refer to the "PREVENTIVE CHECKS AND SERVICE INTERVALS" (CONFIRMATION OF USING HOURS). Can be checked of the INITIAL DATA of MEMORY IC. Refer to the "NOTE FOR THE REPLACING OF MEMORY IC". VOL. (-) MIN 8 Writing of EEPROM initial data. NOTE: Do not use this for the normal servicing. Display of the Adjustment MENU on the screen. Refer to the "ELECTRICAL ADJUSTMENT" (On-Screen Display Adjustment). Operations
VOL. (-) MIN
1
VOL. (-) MIN
2
VOL. (-) MIN
3
VOL. (-) MIN
4
VOL. (-) MIN
5
VOL. (-) MIN
6
VOL. (-) MIN
9
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" (PG SHIFTER). The EOT/BOT/Reel sensor do not work at this moment. Refer to the "PREPARATION FOR SERVICING"
C2-1
PREVENTIVE CHECKS AND SERVICE INTERVALS
The following standard table depends on environmental conditions and usage. Unless maintenance is properly carried out, the following service intervals may be quite shortened as harmful effects may be had on other parts. Also, long term storage or misuse may cause transformation and aging of rubber parts. Time Parts Name Audio Control Head Full Erase Head (Recorder only) Capstan Belt Pinch Roller Capstan DD Unit Loading Motor Tension Band Capstan Shaft Tape Running Guide Post Cylinder Unit : Clean : Replace 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 USING HOURS
POWER ON total hours and PLAY/REC total hours can be checked on the screen. Total hours are displayed in 16 system of notation. NOTE: The confirmation of using hours will not be possible if clock has been set. To reset clock, either unplug AC cord and allow at least 5 seconds before Power On. 1. Set the VOLUME to minimum. 2. While holding down VOLUME button on front cabinet, press key 6 on remote control simultaneously. 3. After the confirmation of using hours, turn off the power.
INIT
00
83
Initial setting content of MEMORY IC. POWER ON total hours. PLAY/REC total hours.
POWER ON 0010 PLAY/REC 0003
(16 x 16 x 16 x thousands digit value) + (16 x 16 x hundreds digit value) + (16 x tens digit value) + (ones digit value)
C3-1
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 Wrap a piece of chamois around your finger. Dip it in isopropyl alcohol and clean the audio control head by wiping it horizontally. 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
C3-2
NOTE FOR THE REPLACING OF 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: Initial Data setting will not be possible if clock has been set. To reset clock, either unplug AC cord and allow at least 5 seconds before Power On.
ADDRESS 00 01 02 03 04 05 06 07 08 09 DATA 08 13 82 63 83 14 34 89 75 30 ADDRESS 0A 0B 0C 0D 0E 0F 10 11 12 13 DATA 10 97 19 00 00 00 8C 68 5C 53 ADDRESS 14 15 16 17 18 19 1A 1B 1C 1D DATA 00 00 00 05 05 00 A9 0F 04 39 ADDRESS 1E 1F 20 21 22 23 24 25 26 27 DATA 8D 00 00 00 00 00 00 00 00 00 ADDRESS 28 29 DATA 01 00
Table 1 1. Enter DATA SET mode by setting VOLUME to minimum. 2. While holding down VOLUME button on front cabinet, press key 6 on remote control simultaneously. ADDRESS and DATA should appear as FIG 1.
ADDRESS DATA
INIT
00
83
POWER ON 0010 PLAY/REC 0003
Fig. 1 3. ADDRESS is now selected and should "blink". Using the SET + or - keys on the remote, step through the ADDRESS until required ADDRESS to be changed is reached. 4. Press ENTER to select DATA. When DATA is selected, it will "blink". 5. Again, step through the DATA using SET + or - until required DATA value has been selected. 6. Pressing ENTER will take you back to ADDRESS for further selection if necessary. 7. Repeat steps 3 to 6 until all data has been checked. 8. 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.
C4-1
SERVICING FIXTURES AND TOOLS
(For 2 heads model) VHS Alignment Tape JG001 (VN 2 S-LI6 3 ) JG001A (VN 2 S-CO13 ) JG001Q (VN 2 S-LI6 3 H) JG001T (VN 2 S-X6 3 ) (For 4 heads model) VHS Alignment Tape JG001B (VN 1 S-LI6 3 ) JG001I (VN 1 S-CO13 ) JG001P (VN 1 S-LI6 3 H) JG001S (VN 1 S-X6 3 )
JG002B Adapter JG002E Dial Torque Gauge (10~90gf·cm) JG002F (60~600gf·cm)
JG005 Post Adjustment Screwdriver Part No. SV-TG0-030-000 (small)
JG153 X Value Adjustment Screwdriver
JG022 Master Plane
JG024A Reel Disk Height Adjustment Jig
JG100A Torque Tape (VHT-063)
JG154 Cable
Tentelometer
Part No. JG001 JG001A JG001Q JG001T JG001B JG001I JG001P JG001S JG002B JG002E JG002F JG005 JG153 JG022/JG024A JG100A JG154 Monoscope, 6KHz (For 2 heads model) Color Bar, 1KHz (For 2 heads model) Hi-Fi Audio (For 2 heads Hi-Fi model) X Value Adjustment (For 2 heads model) Monoscope, 6KHz (For 4 heads model) Color Bar, 1KHz (For 4 heads model) Hi-Fi Audio (For 4 heads Hi-Fi model) X Value Adjustment (For 4 heads model)
Remarks
VSR Torque, Brake Torque (S Reel/T Reel Ass'y) Brake Torque (T Reel Ass'y) VSR Torque, Brake Torque (S Reel) Guide Roller Adjustment X Value Adjustment Reel Disk Height Adjustment Playback Torque, Back Tension Torque During Playback Used to connect the test point of SERVICE and GROUND
PREPARATION FOR SERVICING
How to use the Servicing Fixture 1. Unplug the connector CP757 and CP353, then remove the TV/VCR Block from the set. 2. Remove the Operation PCB from the set, then connect it with the Syscon PCB. If necessary, connect CP353. (Front A/V Jack Input Terminal) 3. Short circuit between TP1001 and Ground with the cable JG154. (Refer to MAJOR COMPONENTS LOCATION GUIDE) 4. The EOT, BOT and Reel Sensor do not work at this moment. At that time, the STOP/EJECT button is available to insert and eject the Cassette Tape. C5-1
MECHANICAL ADJUSTMENTS
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.) · When you activate the deck without the Cassette Holder, short circuit between TP1001 and GND. (Refer to ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE) In this condition the BOT/EOT/Reel Sensor will not function. 1-1: CONFIRMATION AND ADJUSTMENT OF REEL DISK HEIGHT 1. Turn on the power and set to the STOP mode. 2. Set the master plane (JG022) and reel disk height adjustment jig (JG024A) on the mechanism framework, taking care not to scratch the drum, as shown in Fig. 11-A. 3. Confirm that "A" of the reel disk is lower than "B" of the reel disk height adjustment jig (JG024A) , and is higher than "C". If it is not enough height, adjust to 10(+0.2, -0) mm with the height adjustment washer. 4. Adjust the other reel in the same way.
Master Plane (JG022)
1-2: CONFIRMATION AND ADJUSTMENT OF TENSION POST POSITION 1. Set to the PLAY mode. 2. Adjust the Tension Adjust until the edge of the Tension Arm is positioning within 0.5mm range from the standard line center of Main Chassis. After this adjustment, confirm that the cut position is located in "A" area as shown in Fig. 1-2-B. If it is located in "B" area, adjust again. 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) Standard line center of Main Chassis Tension Adjust
Fig. 1-2-A
Reel Disk Height Adjustment Jig (JG024A)
(A) Cut Position
(B) Tension Adjust
Fig. 1-2-B 1-3: CONFIRMATION OF PLAYBACK TORQUE AND BACK TENSION TORQUE DURING PLAYBACK Fig. 1-1-A
Reel Disk Height Adjustment Jig (JG024A) (B)
Reel Disk
1. Load a video tape (T-120) recorded in standard speed mode. Set the unit to the PLAY mode. 2. Install the tentelometer as shown in Fig. 1-3. Confirm that the meter indicates 20 ± 2gf in the beginning of playback. · USING A CASSETTE TYPE TORQUE TAPE (JG100A) 1. After confirmation and adjustment of Tension Post position (Refer to item 1-2), load the cassette type torque tape (JG100A) and set to the PLAY mode. 2. Confirm that the right meter of the torque tape indicates 60~110gf·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.
Tentelometer
Master Plane (JG022)
10(+0.2, -0)mm (C)
(A) Height Adjustment Washer 2.6x4.7xT0.13 2.6X4.7xT0.25
Video Tape
Fig. 1-1-B
P1 Post
Guide Roller
Fig. 1-3 D1-1
MECHANICAL ADJUSTMENTS
1-4: CONFIRMATION OF VSR TORQUE 1. Operate within 4~5 seconds after the reel disk begins to turn. 2. Install the Torque Gauge (JG002F) and Adapter (JG002B) on the S Reel. Set to the Rewind mode. (Refer to Fig.1-4) 3. 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. 1-5: CONFIRMATION OF REEL BRAKE TORQUE (S Reel Brake) (Refer to Fig. 1-4) 1. Set to the STOP mode. 2. Move the Idler Ass'y from the S Reel. 3. Install the Torque Gauge (JG002F) and Adapter (JG002B) on the S Reel. Turn the Torque Gauge (JG002F) clockwise. 4. Then, confirm that it indicates 60~100gf·cm. (T Reel Brake) (Refer to Fig. 1-4) 1. Set to the STOP mode. 2. Move the Idler Ass'y from the T Reel. 3. Install the Torque Gauge (JG002E) and Adapter (JG002B) on the T reel. Turn the Torque Gauge (JG002E) counterclockwise. 4. Then, confirm that it indicates 45~70gf·cm.
Torque Gauge/Adapter (JG002F/JG002B)
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 (JG001 or JG001B). (Refer to SERVICING FIXTURE AND TOOLS) 2. Connect CH-1 of the oscilloscope to TP4001 (Envelope) and CH-2 to TP1002 (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 Adjusting Driver (JG005) slightly until the envelope will be flat. Even if you press the Tracking Button, adjust so that flatness is not moved so much. 6. Adjust so that the A : B ratio is better than 3 : 2 as shown in Fig. 2-1-B, 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 (TP4001)
Torque Gauge/Adapter (JG002E/JG002B)
CH-1 Track CH-2 SW Pulse (TP1002)
CH-2 Track
S Reel
Envelope
T Reel
(1)
Fig. 1-4 NOTE If the torque is out of the range, replace the following parts. Check item 1-4 1-5 Replacement Part Idler Ass'y/Clutch Ass'y
CH-3 Audio (2)
Fig. 2-1-A
Entrance
Exit
Max
T Brake Spring/Tension Spring
A
B
Max
A:B=3:2
Fig. 2-1-B
D1-2
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 (JG001 or JG001B). (Refer to SERVICING FIXTURE AND TOOLS) 2. Confirm that the reflected picture of stamp mark is appeared on the tape prior to P4 Post as shown in Fig. 2-2-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 Post
2-3: TAPE RUNNING ADJUSTMENT (X VALUE ADJUSTMENT) 1. Confirm and adjust the height of the Reel Disk. (Refer to item 1-1) 2. Confirm and adjust the position of the Tension Post. (Refer to item 1-2) 3. Adjust the Guide Roller. (Refer to item 2-1) 4. Confirm and adjust the Audio/Control Head. (Refer to item 2-2) 5. Connect CH-1 of the oscilloscope to TP4001, CH-2 to TP1002 and CH-3 to HOT side of Audio Out Jack. 6. Playback the VHS Alignment Tape (JG001S or JG001T). (Refer to SERVICING FIXTURE AND TOOLS) 7. Press and hold the Tracking-Auto button on the remote control more than 2 seconds to set tracking to center. 8. Set the X Value adjustment driver (JG153) to the 4 of Fig. 2-2-B. Adjust X value so that the envelope waveform output becomes maximum. Check if the relation between Audio and Envelope waveform becomes (1) or (2) of Fig. 2-1-A. 2-4: CONFIRM HI-FI AUDIO (Hi-Fi model only) 1. Connect CH-1 of the oscilloscope to TP4001, CH-2 to TP1002 and CH-3 to the Hi-Fi Audio Out Jack. 2. Playback the VHS Alignment Tape (JG001P or JG001Q). (Refer to SERVICING FIXTURE AND TOOLS) 3. Press and hold the Tracking-Auto button on the remote control more than 2 seconds to set tracking to center. 4. Press the Tracking Up button and count number of steps which the audio output is changed from Hi-Fi (10KHz) to MONO (6KHz). 5. Press the Tracking Down button and count number of steps which the audio output is changed from Hi-Fi (10KHz) to MONO (6KHz). 6. Confirm that the difference between these counted steps number in the above items are within 2 steps. If the difference are more than 3 steps, do Tape Running Adjustment again. (Refer to item 2-3)
Stamp Mark
Fig. 2-2-A
Audio/Control Head
3
1
2 4
Fig. 2-2-B
Audio/Control Head Tape
0.25±0.05mm
Fig. 2-2-C
D1-3
MECHANICAL ADJUSTMENTS
3. MECHANISM ADJUSTMENT PARTS LOCATION GUIDE
5
6
4
3 7 2 1 8
10
9
1. Tension Adjust 2. Tension Arm 3. Guide Roller 4. P1 Post 5. Audio/Control Head
6. X value adjustment driver hole 7. P4 Post 8. T Brake Spring 9. T Reel 10. S Reel
D1-4
ELECTRICAL ADJUSTMENTS
1. BEFORE MAKING ELECTRICAL ADJUSTMENTS
Read and perform these adjustments when repairing the circuits or replacing electrical parts or PCB assemblies. CAUTION · Use an isolation transformer when performing any service on this chassis. · Before removing the anode cap, discharge electricity because it contains high voltage. · When removing a PCB or related component, after unfastening or changing a wire, be sure to put the wire back in its original position. Inferior silicon grease can damage IC's and transistors. · When replacing IC's and transistors, use only specified silicon grease (YG6260M). Remove all old silicon before applying new silicon. On-Screen Display Adjustment 1. Unplug the AC plug for more than 5 seconds to set the clock to the non-setting state. Then, set the volume level to minimum. 2. Press the VOL. DOWN button on the set and the Channel button (9) on the remote control simultaneously to appear the adjustment mode on the screen as shown in Fig. 1-1.
2. BASIC ADJUSTMENTS (VCR SECTION)
2-1: PG SHIFTER 1. Connect CH-1 on the oscilloscope to TP1002 and CH-2 to pin 4 of CP1003. 2. Playback the alignment tape. (JG001A) 3. Press and hold the Tracking-Auto button on the remote control more than 2 seconds to set tracking to center. 4. Press the VOL. DOWN button on the set and the channel button (3) on the remote control simultaneously until the indicator REC disappears. If the indicator REC disappears, adjustment is completed. (If the above adjustments doesn't work well:) 5. Press the VOL. DOWN button on the set and the channel button (3) on the remote control simultaneously until the indicator REC disappears. 6. When the REC indicator is blinking, press both VOL. DOWN button on the set and the channel button (4) on the remote control simultaneously and adjust the Tracking +/- button until the arising to the down of Head Switching Pulse becomes 6.5 ± 0.5H. (Refer to Fig. 2-1-A, B) 7. Press the Tracking Auto button.
CH-2
TV
6.5H CH-1
00 OSD
15 Fig. 1-1
Fig. 2-1-A
3. Use the Channel UP/DOWN button or Channel button (0-9) on the remote control to select the options shown in Fig. 1-2. 4. Press the MENU button on the remote control to end the adjustments.
6.5H
CH-2
CH-1
NO. 00 01 02 03 04 05 06 07 08 09 10 11 12
FUNCTION OSD H CUT OFF RF AGC VIF VCO H VCO H PHASE V SIZE V SHIFT R DRIVE B DRIVE R BIAS G BIAS B BIAS
NO. 13 14 15 16 17 18 19 20 21 22 23 24
FUNCTION BRIGHTNESS CONTRAST COLOR TINT SHARPNESS FM LEVEL LEVEL SEPARATION 1 SEPARATION 2 TEST MONO TEST STEREO X-RAY TEST Fig. 1-2
Fig. 2-1-B 2-2: VCO FREERUN 1. Place the set with Aging Test for more than 10 minutes. 2. Receive the VHF HIGH. 3. Disconnect the Antenna while receiving the VHF HIGH and set to the Noise screen. 4. Once turn off the Power and turn on the Power again. 5. Approxi. 3 seconds later, input the Antenna again. 6. Connect the digital voltmeter between the pin 5 of CP351 and the pin 1 (GND) of CP351. 7. Activate the adjustment mode display of Fig. 1-1 and press the channel button (03) on the remote control to select "VIF VCO". 8. Press the VOL. UP/DOWN button on the remote control until the digital voltmeter is 2.5 ± 0.5V.
D2-1
ELECTRICAL ADJUSTMENTS
2-3: RF AGC 1. Receive an 70dB monoscope pattern. 2. Connect the digital voltmeter between the pin 5 of CP351 and the pin 1 (GND) of CP351. 3. Activate the adjustment mode display of Fig. 1-1 and press the channel button (02) on the remote control to select "RF AGC". 4. Press the VOL. UP/DOWN button on the remote control until the digital voltmeter is 2.4 ± 0.05V. 2-8: HORIZONTAL PHASE 1. Receive the center cross signal from the Pattern Generator. 2. Activate the adjustment mode display of Fig. 1-1 and press the channel button (05) on the remote control to select "H PHASE". 3. Press the VOL. UP/DOWN button on the remote control until the vertical line becomes fit to the notch of the shadow mask. 2-9: VERTICAL SHIFT 1. Receive the center cross signal from the Pattern Generator. 2. Activate the adjustment mode display of Fig. 1-1 and press the channel button (07) on the remote control to select "V SHIFT". 3. Press the VOL. UP/DOWN button on the remote control until the horizontal line becomes fit to the notch of the shadow mask. 2-10: VERTICAL SIZE 1. Receive the cross hatch signal from the Pattern Generator. 2. Activate the adjustment mode display of Fig. 1-1 and press the channel button (06) on the remote control to select "V SIZE". 3. Press the VOL. UP/DOWN button on the remote control until the rectangle on the center of the screen becomes square. 4. Receive a broadcast and check if the picture is normal. 2-11: SUB BRIGHTNESS 1. Receive the black pattern*. (RF Input) 2. Activate the adjustment mode display of Fig. 1-1 and press the channel button (13) on the remote control to select "BRIGHTNESS". 3. Press the VOL. UP/DOWN button on the remote control until the screen begin to shine. 4. Receive the black pattern*. (Audio Video Input) 5. Press the INPUT SELECT button on the remote control to set to the AV mode. Then perform the above adjustments 2~3. *The Black Pattern means the whole black raster signal. Select the "RASTER" of the pattern generator, set to the OFF position for each R, G and B. 2-12: SUB CONTRAST 1. Activate the adjustment mode display of Fig. 1-1 and press the channel button (14) on the remote control to select "CONTRAST". 2. Press the VOL. UP/DOWN button on the remote control until the contrast step No. becomes "80" 3. Press the INPUT SELECT button on the remote control to set to the AV mode. 4. Activate the adjustment mode display of Fig. 1-1 and press the channel button (14) on the remote control. 5. Press the VOL. UP/DOWN button on the remote control until the contrast step No. becomes "85"
(TV SECTION)
2-4: CONSTANT VOLTAGE 1. Connect the digital voltmeter to the FUSE HOLDER of FH503. 2. Set condition is AV MODE without signal. 3. Adjust the VR502 until the digital voltmeter is 135 ± 0.5V. 2-5: CUT OFF 1. Adjust the unit to the following settings. R BIAS=64, G BIAS=64, B BIAS=64, BRIGHTNESS=128, CONTRAST=64 2. Place the set with Aging Test for more than 15 minutes. 3. Set condition is AV MODE without signal. 4. Activate the adjustment mode display of Fig. 1-1 and press the channel button (01) on the remote control to select "CUT OFF". 5. Adjust the Screen Volume until a dim raster is obtained. 2-6: WHITE BALANCE NOTE: Adjust after performing CUT OFF adjustment. 1. Place the set with Aging Test for more than 15 minutes. 2. Receive the color bar pattern. 3. Using the remote control, set the brightness and contrast to normal position. 4. Activate the adjustment mode display of Fig. 1-1 and press the channel button (10) on the remote control to select "R.BIAS". 5. Using the VOL. UP/DOWN button on the remote control, adjust the R.BIAS. 6. Press the CH. UP/DOWN button on the remote control to select the "R.DRIVE", "B.DRIVE", "G.BIAS" or "B.BIAS". 7. Using the VOL. UP/DOWN button on the remote control, adjust the R.DRIVE, B.DRIVE, G.BIAS or B.BIAS. 8. Perform the above adjustments 6 and 7 until the white color is looked like a white. 2-7: FOCUS 1. Receive the monoscope pattern. 2. Turn the Focus Volume fully counterclockwise once. 3. Adjust the Focus Volume until picture is distinct.
D2-2
ELECTRICAL ADJUSTMENTS
2-13: SUB TINT 1. Receive the color bar pattern. (RF Input) 2. Connect the synchro scope to TP803. 3. Activate the adjustment mode display of Fig. 1-1 and press the channel button (16) on the remote control to select "TINT". 4. Press the VOL. UP/DOWN button on the remote control until the waveform becomes as shown in Fig. 2-2. 5. Receive the color bar pattern. (Audio Video Input) 6. Press the INPUT SELECT button on the remote control to set to the AV mode. Then perform the above adjustments 2~4. 2-15: OSD HORIZONTAL 1. Activate the adjustment mode display of Fig. 1-1. 2. Press the VOL. UP/DOWN button on the remote control until the difference of A and B becomes minimum. (Refer to Fig. 2-4)
TV
00 OSD A Fig. 2-2 2-14: SUB COLOR 1. Receive the color bar pattern. (RF Input) 2. Connect the synchro scope to TP801. 3. Activate the adjustment mode display of Fig. 1-1 and press the channel button (15) on the remote control to select "COLOR". 4. Press the VOL. UP/DOWN button on the remote control until the red color level is adjusted to 110% of the white level. (Refer to Fig. 2-3) 5. Receive the color bar pattern. (Audio Video Input) 6. Press the INPUT SELECT button on the remote control to set to the AV mode. Then perform the above adjustments 2~4. White 0% 0%
15 B
Fig. 2-4
110% Red Level White 100% Fig. 2-3
D2-3
ELECTRICAL ADJUSTMENTS
3. ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE
TP1001
CP1003
TP1002 TP4001
FH503 VR502
TU001
FB401 CP351
FOCUS VOLUME SCREEN VOLUME SYSCON
TP801 TP803 J801
CRT
D2-4
ELECTRICAL ADJUSTMENTS
4. PURITY AND CONVERGENCE ADJUSTMENTS
NOTE 1. Turn the unit on and let it warm up for at least 30 minutes before performing the following adjustments. 2. Place the CRT surface facing east or west to reduce the terrestrial magnetism. 3. Turn ON the unit and demagnetize with a Degauss Coil. 4-1: STATIC CONVERGENCE (ROUGH ADJUSTMENT) 1. Tighten the screw for the magnet. Refer to the adjusted CRT for the position. (Refer to Fig. 4-1) If the deflection yoke and magnet are in one body, untighten the screw for the body. 2. Receive the green raster pattern from the color bar generator. 3. Slide the deflection yoke until it touches the funnel side of the CRT. 4. Adjust center of screen to green, with red and blue on the sides, using the pair of purity magnets. 5. Switch the color bar generator from the green raster pattern to the crosshatch pattern. 6. Combine red and blue of the 3 color crosshatch pattern on the center of the screen by adjusting the pair of 4 pole magnets. 7. Combine red/blue (magenta) and green by adjusting the pair of 6 pole magnets. 8. Adjust the crosshatch pattern to change to white by repeating steps 6 and 7. 4-2: PURITY NOTE Adjust after performing adjustments in section 4-1. 1. Receive the green raster pattern from color bar generator. 2. Adjust the pair of purity magnets to center the color on the screen. Adjust the pair of purity magnets so the color at the ends are equally wide. 3. Move the deflection yoke backward (to neck side) slowly, and stop it at the position when the whole screen is green. 4. Confirm red and blue colors. 5. Adjust the slant of the deflection yoke while watching the screen, then tighten the fixing screw. DEFLECTION YOKE DEFLECTION YOKE SCREW MAGNET SCREW 4-3: STATIC CONVERGENCE NOTE Adjust after performing adjustments in section 4-2. 1. Receive the crosshatch pattern from the color bar generator. 2. Combine red and blue of the 3 color crosshatch pattern on the center of the screen by adjusting the pair of 4 pole magnets. 3. Combine red/blue (magenta) and green by adjusting the pair of 6 pole magnets. 4-4: DYNAMIC CONVERGENCE NOTE Adjust after performing adjustments in section 4-3. 1. Adjust the differences around the screen by moving the deflection yoke upward/downward and right/left. (Refer to Fig. 4-2-a) 2. Insert three wedges between the deflection yoke and CRT funnel to fix the deflection yoke. (Refer to Fig. 4-2-b) RGB RGB
R G B
R G B RIGHT/LEFT SLANT
UPWARD/DOWNWARD SLANT
Fig. 4-2-a
WEDGE
WEDGE
WEDGE WEDGE POSITION Fig. 4-2-b
6 POLE MAGNETS 4 POLE MAGNETS PURITY MAGNETS Fig. 4-1
D2-5
TV BLOCK DIAGRAM
MICON/ POWER/ OPERATION/ DECK
V. OUTPUT IC IC401 LA78040
SCL SDA Q602, Q603 AT+5V AT+25V REG. Q606 REG. Q604, Q605 REG. CHROMA IC IC601 M61203BFP 63 48 DELAY ADJ TU601 1 4 5 11 SAW FILTER CF601 1 4 5 60 52 P. CON+8V AMP PUMP UP VCC 1 2 3 5 THERMAL PROTECTION
Y/C/AUDIO/ HEAD AMP/ IN/OUT Y/C_AUDIO CHROMA_VIDEO
TU_AUDIO TU_VIDEO
AT+5V
7 Q405 Q406 H. OUTPUT
DY
56 57
55
41
NC 42 RESET
33 39 46
13
53 50
H-DRIVE
62 1 64
5.7Vreg RF AGC IF AGC VCO
FB401 P-ON-ON POWER ON CONTROL BUS I/F 10 5 27 1 COL
2 +B
VIF AMP
VIDEO DET
APC DET
HV J801
AFT DEFEAT AFT OUT VIDEO BLACK STRETCH MUTE GAMMA CLAMP
LOCK DET
RGB MATRIX CONTRAST
BRIGHT
DRIVE AMP
CLAMP 26 R G B CUT OFF
HV BLK
14 15 16
6 E180 7 ABL 9 AFC 10 HEA
F S
F 8 3 7 V801 CRT
DEMODULATOR
E180V
9
Y/C/AUDIO/ HEAD AMP/ IN/OUT
VERTICAL COUNT DOWN
V.RAMP
17 29 21
Q804 RED AMP Q806 BLUE AMP Q608 CUT OFF
H.SYNC
31 VIDEO TONE DELAY ACC CHROMA TRAP HPF ACC DET VCO ADJ VCXO AFC 1 H VCO AFC 2 CHROMA BPF
KILLER DET
HORIZONTAL COUNT DOWN
P. CON+8V
Q805 GREEN AMP
CHROMA APC DET
Q404 MICON/ POWER/ OPERATION/ DECK
X-RAY
Q403
SW.
36
34
35
32
12
6
7
Q609 POWER ON SW.
TV_POWER-H VD HD OSD_BLK OSD_B MICON/ POWER/ OPERATION/ DECK
X-RAY_TEST
SW.
X602 3.579545MHz L503 DEGAUSS COIL
Q612 TH501 2 2 1 1 RY501 RELAY F501 AC IN SYNC SW Q611 POWER FAIL SW.
OSD_R OSD_G AFT_M SOUND AMP IC IC351 AN7511
Q504
RELAY DRIVE
POWER_FAIL
J351 2
T501 8 16 14 13 11 9 F502
D501
RECTIFIER
6 8
HEAD JACK
CD352 SP+ SP
SP351 SPEAKER
5 AT+12V UNREG+8V POWER_FAIL
Q402 DRIVER
Q507 FEED BACK SW. VR502 +B ADJ Q506 5V SW.
FEED BACK IC506 TLP621(GR)
5
1
3
1
4
POWER REG. IC IC502 STR-G6623
Q501 Q513
5V SW.
5V REG. IC
1 2 3
Q401
POWER SW.
P. CON+5V
SWITCHING VCR_POWER-H TV_POWER-H
MICON/POWER/ OPERATION/DECK
IC501 KIA7805PI
E-1
TV_A_MUTE
E-2
Y/C/AUDIO/HEAD AMP/IN/OUT BLOCK DIAGRAM
X4001 3.579545MHz Q4009 Y/C/AUDIO/CCD/HEAD AMP IC IC4001 LA71077BM-MPB BUFFER NC
Q4008
EP SW
61
VX01 NC 85 L H
62
51
PULL TIMMING
53
49
OUT
47
36 74 59
Q4011
TRICK PB SW
SP/LP/EP-H INPUT_SEL
MICON/POWER/ OPERATION/ TRICK_PB-H/EE-H DECK
DRIVER
CCD
FM MOD
CLAMP
55
DETAL ENH
H.SW
REC FM-EQ
WC DC
NL EMPHA V/I CONV
30 19 CLAMP P P 28 R R
YNR/ COMB N.L. DEEM NC1 Y/C MIX Y/C R/P AUDIO R/P 1/2 C ROT VCA CLAMP
DOC_XO_CTL
84 83
H H.AMP SW L
AGC AMP
KIL C-LPF
25
Y-LPF
CP4001 2 SP-CH2 (L)
CYL
NC 82 88
P
R
GCA
R
B-UP AMP ACC AMP
R
Main CONV
P
3.58M BPF2
46 44
3 SP_COM 4 SP-CH1 (R) 89 90
H
FM AGC DELAY
H.SW L
P
3.58M BPF1 KIL B.D. PB AMP
16 17
REC/EE/PB
91
MICON/POWER/ OPERATION/ COMP DECK
PB FM-EQ PB PHASE-EQ
DOUBLE LIM FM DEM SUB LPF
V-AGC
14 13 12 11 93 31
Q4007
C. ROTARY H. SW
P
94
7 5
REC AMP
R
RF SW IN AUDIO FBC MUTE H.A R/P ENV DET Chara INS.
VCR_A_MUTE
V. REC_ST-H ENV. DET DUMMY_V. SYNC MICON/POWER/ OPERATION/ DECK
FE HEAD
CP4003 1 FE HEAD (HOT)
2 FE HEAD (GND)
6
P
R
AUTO BIAS
4 PB.EE 99
EQ AMP
LINE AMP MUTE
ALC
6dB
SYNC SEP
35 34
BUFFER
SD_VIDEO
H. SYNC
TV
3
2
1
100
96
98 97
80 76
42 38
FRONT_AUDIO FRONT_VIDEO TU_VIDEO TU_AUDIO TV
MICON/POWER/ OPERATION/ DECK
CP4002 6 AUDIO PB
5 AUDIO REC CTL+ CTLAE HEAD(-) AE HEAD(+) 4 3 2 1
T4001
Q4005 2 3
BIAS CTL
5 6
A/C HEAD
Q4006 BIAS OSC P. CON+5V
CHROMA_VIDEO 2 3 Y/C_AUDIO
4
1
L4004
Q4001, Q4002
AUDIO PB SW
Q4003 SW
CTL+ CTL-
MICON/POWER/ OPERATION/ DECK
E-3
E-4
MICON/POWER/OPERATION/DECK BLOCK DIAGRAM
SW1001
2 1
3 4
TIMER SYSCON MICON IC IC1001 OEC7043A
50
TAB SW
RESET-L
34
3 OUT
SYSTEM RESET IC IC1002 PST600H
POWER FAIL(DC)
AT+5.6V P. CON+5V
1 2 1 2 4 3 4 3
MS_SEN B Q1003 MS_SEN A Q1009
POWER_FAIL_L 1 MSSEN-A X-OUT(12MHz) X-IN(12MHz) 2 MSSEN-B XC-OUT(32KHz)
85 39 38 36 35
X1001 12MHz X1002 32.768KHz
Q1023 X_RAY_SW AUDIO L
J701 3 1 4 2 FRONT_VIDEO FRONT_AUDIO COMP CTL+ CTLV. REC_ST_H SD_VIDEO H. SW
XC-IN(32MHz) ENV_CMP_IN
23 80
Q1002
SENSER SW
1 2 1 2 X-RAY_TEST VCR_POWER_H CP1004 4 CTL CAPSTAN 6 FG DD UNIT 7 CAP/M F/R
CP1005 1 CYL PG MICRO MOTOR 3 CYL FG 5 CYL DRIVE
VIDEO 17
95 94 66 56 18 61 67 83 69 6
SENS LED
REEL-T
CTL+ CTL-
3
REEL SENS.
4 3 4
Q1001
V-REC-ST-H
CVIN
Y/C/AUDIO/ HEAD AMP/ IN/OUT
79 REEL SENS.
Q1005
REEL-S
VIDEO-H. SW
REC-H/EE-M/PB-L
X-RAY_TEST VCR-POWER CAP-PWM CAP-FG CAP-FWD DRUM-PG DRUM-FG DRUM-PWM FF/REW-L
REC/EE/PB DOC_XO_CTL SP/LP/EP-H TRICK_PB-H/EE-H ENV_DET VCR_A_MUTE 5 SDA 6 SCL Q1004 FF/REW_SW
EEP ROM IC IC1099 S-24C02BDP-11
41 27 76 87 11 90 89 77 D1003 P. CON+5V Q1024 LED DRIVER P. CON+5V 68
DOC/XO-CTL SP/LP/EP-H TRICK_PB-H/EE-H ENV_DET VCR_A_MUTE
IIC-DATA1 IIC-CLK1 CTL AMP-OUT
TV
81
72 71 97 73 64 63 62 7 60 59 58 82 9 28
X_RAY SDA SCL OSD_R OSD_G OSD_B AFT_M OSD_BLK VD HD TV_A_MUTE TV_POWER_H
CENTER LED
R G B
3
EOT SENSOR Q1013
EOT
TV
AFT(MONI) OSD OUT1 V-SYNC
Y/C/AUDIO/ HEAD AMP/ IN/OUT
C_ROTARY DUMMY_V. SYNC INPUT_SEL LOADING MOTOR DRIVER IC IC1003 BA6955AN CONTROL LOGIC POWER SAVE STD
15 13 33
COLOR ROTARY DUMMY-V.SYNC INPUT_SEL
H/C-SYNC TV_A_MUTE KEY A
TV-POWER
KEY B
POWER ON/OFF
REC/OTR
STOP/EJECT
PLAY
FF/CUE
REW/REV
10 Q4204 OS753 1 2 3
2
5
7
4
20
TV POWER SW
LDM-RVS LDM-FWD
REMOCON-IN REC LED 14 Q1007 30
21
CH DOWN
CH UP
VOL. UP
VOL. DOWN
M101 LOADING MOTOR
LM
CP101 LDM+
CP1006
4 3 2 1
4 3 2 1
LDM+ LDMBOT VCC
P. CON+5V 4
REC LED SW
REC/OTR T-REC POWER/PLAY D792
AT+5.6V
LDMBOT VCC
BOT
T-REC LED 29
D793 Q1008
D791
T-REC LED SW
E-5
BOT SENSER Q101
E-6
PRINTED CIRCUIT BOARDS
OPERATION
SOLDER SIDE
SW797 SW799 W007 SW791 R775 SW794 SW792 SW793 SW795 W004 W005 J701_1 C701 C779 R772 R773 R774 W001 R771 R778 C755_1 D793 D791 C752 W006 SW751 R351
J351
W003 W009 W805 W811 C382 R777
W812 W814
R776 C781
C751
R350_1 W815 SW796 CD757 CD351_1 S