Text preview for : Bush BTV17 Goodmans GTV371VCR.pdf part of Bush BTV17 Goodmans GTV371VCR Bush BTV17 Goodmans GTV371VCR
Back to : Bush BTV17 Goodmans GTV37 | Home
BUSH BTV17 GOODMANS GTV371VCR
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, B3-2 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, C5-2 MECHANICAL ADJUSTMENTS ................................................................................................ D1-1~D1-4 ELECTRICAL ADJUSTMENTS .................................................................................................. D2-1~D2-6 BLOCK DIAGRAMS TV ............................................................................................................................................ Y/C/AUDIO/HEAD AMP/21PIN/IN/OUT .................................................................................. MICON/POWER/OPERATION/DECK ..................................................................................... T' TEXT .................................................................................................................................... PRINTED CIRCUIT BOARDS MAIN/CRT ................................................................................................................................ OPERATION/DECK ................................................................................................................. SYSCON .................................................................................................................................. SCHEMATIC DIAGRAMS Y/C/AUDIO/HEAD AMP .......................................................................................................... MICON ..................................................................................................................................... POWER ................................................................................................................................... 21PIN/IN/OUT .......................................................................................................................... CHROMA/IF ............................................................................................................................. SOUND AMP ........................................................................................................................... T' TEXT .................................................................................................................................... TV POWER .............................................................................................................................. DEFLECTION .......................................................................................................................... E-1, E-2 E-3, E-4 E-5, E-6 E-7, E-8 F-1, F-2 F-3, F-4 F-5~F-8 G-1, G-2 G-3, G-4 G-5, G-6 G-7, G-8 G-9, G-10 G-11, G-12 G-13, G-14 G-15, G-16 G-17, G-18
CRT .......................................................................................................................................... G-19, G-20 OPERATION ............................................................................................................................ G-21, G-22 DECK ....................................................................................................................................... G-23, G-24 INTERCONNECTION DIAGRAM ............................................................................................... G-25, G-26 WAVEFORMS ............................................................................................................................. H-1~H-3 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
A2-1
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 2 screws 2. 3. Remove the 2 screws 3 which are used for holding the Back Cabinet. 4. Remove the AC cord from the AC cord hook 4. 5. Remove the Back Cabinet in the direction of arrow.
Front Cabinet
1-3: TV/VCR BLOCK (Refer to Fig. 1-3) 1. Remove the 2 screws 1. 2. Disconnect the following connectors: (CP351, CP757, CP302, CP403 and CP401). 3. Unlock the support 2. 4. Remove the TV/VCR Block in the direction of arrow.
1
Front Cabinet
1
2 1 1
UP TO RELEASE
TV/VCR Block
2
Fig. 1-3 1-4: MAIN PCB (Refer to Fig. 1-4)
3 3
1 2 1 4
Back Cabinet
Fig. 1-1
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 connectors: (CP801 and CP850). 3. Remove the CRT PCB in the direction of arrow.
Front Cabinet CRT PCB
1. Remove the screw 1. 2. Remove the Main PCB Holder. 3. Remove the 3 screws 2. 4. Disconnect the following connectors: (CP810, CP820, CP404, CP501 and CP601). 5. Remove the Main PCB in the direction of arrow.
2
Main PCB
2 2
Main PCB Holder
1
VCR Block
Fig. 1-4
Fig. 1-2
B1-1
DISASSEMBLY INSTRUCTIONS
1-5: DECK SHIELD PLATE AND BOTTOM SHIELD PLATE (Refer to Fig. 1-5) 1. Remove the 2 screws 1. 2. Remove the 4 screws 2. 3. Remove the screw 3. 4. Remove the Deck Shield Plate in the direction of arrow (A). 5. Remove the screw 4. 6. Remove the Bottom Shield Plate in the direction of arrow (B).
Deck Shield Plate
1
1 1
Deck Chassis
3 1
1
Syscon PCB (A)
Fig. 1-6 1-7: JACK PLATE AND SYSCON PCB (Refer to Fig. 1-7) 1. Remove the screw 1. 2. Remove the Syscon PCB in the direction of arrow (A). 3. Remove the 2 screws 2. 4. Unlock the 2 supports 3. 5. Remove the Jack Plate in the direction of arrow (B).
Jack Plate
VCR Block
2
2
(B)
2
(B)
2
2
Syscon PCB Shield Plate Bottom
3 3 1
2 4
Fig. 1-5 1-6: DECK CHASSIS (Refer to Fig. 1-6) 1. Remove the 3 screws 1. 2. Disconnect the following connectors: (CP1001, CD1002, CP1004, CP1005, CP1006, CP4001, CP4004 and CP4005). 3. Remove the Deck Chassis in the direction of arrow.
Deck Holder
(A)
Fig. 1-7
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 2-5: CASSETTE SIDE L/R (Refer to Fig. 2-5) 1. Remove the Locker Spring. 2. Unlock the 4 supports 1 and then remove the Cassette Side L/R. NOTE When you install the Cassette Side L/R, be sure to move the Locker L/R after installing.
1 1
Locker Spring
2 2 2 1
Main Chassis
Fig. 2-2
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
1
1
Tape Guide L Cassette Side R Locker L Cassette Side L
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. Unlock the support 1 and remove the S Reel Stopper. 3. Remove the Tension Spring. 4. Unlock the support 2 and remove the Tension Arm Ass'y. 5. Remove the Tension Adjust. 6. Unlock the 2 supports 3 and remove the Tension Band Ass'y. 7. Unlock the support 4 and remove the Tension Holder.
Tension Adjust (B) (A) Link Ass'y
Link Ass'y
3 3
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
Dumper Spring Loading Motor Ass'y S Reel Stopper
2 4 1
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)
Adjust the direction of the Marker to inside.
2
3
Main Chassis
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.
T Brake Ass'y
· Screw Torque: 5 ± 0.5kgf·cm
Fig. 2-7
2-8: SENSOR COVER L (Refer to Fig. 2-8) 1. Unlock the support 1 and remove the Sensor Cover L. 2. Unlock the 2 supports 2 and remove the Deck PCB (EOT).
T Brake Spring
Main Chassis
Sensor Cover L Deck PCB (EOT)
Fig. 2-10
1 2
2
Fig. 2-8
B2-2
DISASSEMBLY INSTRUCTIONS
2-11: S REEL/T REEL ASS'Y (Refer to Fig. 2-11) 1. Remove the Idler Ass'y. 2. Remove the S Reel and T Reel Ass'y. 3. Remove the 2 Polyslider Washers 1. NOTE 1. Take care not to damage the gears of the S Reel, T Reel Ass'y and Idler Ass'y. 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 Ass'y. (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 (KYODO OIL Slidas #150). (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) NOTE 1. Do not touch the Pinch Roller. (Use gloves.) 2. When you install the Pinch Roller Ass'y, install as shown in the circle. (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 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)
S Reel Idler Ass'y
(A)
T Reel Ass'y
1
(A)
1
2
2
Fig. 2-11 2-12: PINCH ROLLER ASS'Y/P5 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 Ass'y, Pinch Roller Lever and P5 Arm Ass'y.
1
P5 Spring
2
(2) A/C Head
A/C Head Spring
1
A/C Head Base
Fig. 2-13-A
2
Cassette Opener
2
Spring Position
Pinch Roller Ass'y P5 Arm Ass'y
Fig. 2-13-B
2-14: FE HEAD (RECORDER ONLY) (Refer to Fig. 2-14)
Pinch Roller Lever
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.
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.
2
(3) AHC Ass'y Pinch Roller Cam Link Lever Spacer E-Ring Main Cam
1
Middle Gear
2 3
Joint Gear P5 Cam
Fig. 2-17-A
Cylinder Unit Ass'y
2
(1)
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
2
(2)
Check the hole of Main Chassis can be seen.
P5 Cam
· Screw Torque: 5 ± 0.5kgf·cm
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, Ring Clutch, Gear Clutch and Polyslider Washer 2. NOTE When you install the Clutch Ass'y, oil the shaft (KYODO OIL Slidas #150).
1 1
· Screw Torque: 5 ± 0.5kgf·cm
1 1
Fig. 2-16
Clutch Ass'y
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, Link Lever Spacer and P5 Cam. 3. Remove the Polyslider Washer 2, then remove the Pinch Roller Cam. 4. Remove the Polyslider Washer 3, then remove the Joint Gear.
Ring Spring Ring Clutch
Gear Clutch
2
App. 5mm
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 Arm Ass'y. 4. Remove the Main Rod. 5. Remove the Tension Lever. 6. Unlock the 2 supports 2 and remove the Clutch Lever. 7. Remove the screw 3. 8. Remove the LED Reflector. 9. Remove the Loading Arm S Ass'y and Loading Arm T Ass'y. 10. Remove the Loading Gear S and Loading Gear T. 11. Remove the Loading Gear Spring.
Capstan Brake Spring Capstan Brake Arm Ass'y S-S Brake Arm
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 S-S Brake Spring. 3. Unlock the support 2 and remove the Loading Gear Holder. 4. Remove the S-S Brake Arm. 5. Remove the Inclined S. 6. Remove the Inclined T. 7. Remove the 2 screws 3, then remove the Guide Roller. NOTE Do not touch the roller of Guide Roller.
Loading Gear Holder
Guide Roller
2
S-S Brake Spring
1
Main Loading Gear Main Rod
3
Inclined S
Guide Roller
Tension Lever Clutch Lever Loading Gear T
3
Inclined T
1
P4 Cover
2 2
LED Reflector
3
Loading Gear Spring Loading Arm T Ass'y Loading Gear S Loading Gear Spring · Screw Torque: 0.7 ± 0.2kgf·cm
Fig. 2-20
Loading Arm S Ass'y
Fig. 2-19-A NOTE 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
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. * 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.
GND on the CRT
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.)
Location of Anode Cap
Fig. 3-3 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.)
CRT Support Alligator Clip GND on the CRT Screwdriver
Fig. 3-1 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
Fig. 3-4
CRT Support Fig. 3-2
B3-1
DISASSEMBLY INSTRUCTIONS
4. Insert one end of the Anode Support into the anode button, then the other as shown in Fig. 3-5.
CRT
Support Fig. 3-5
5. Confirm that the Support is securely connected. 6. Put on the Rubber Cap without moving any parts.
4. REMOVAL OF DEFLECTION YOKE
(Refer to Fig. 4-1) 1. Loosen the screw 1. 2. Remove the Convergence · Purity Magnet in the direction of arrow (A). 3. Loosen the screw 2. 4. Remove the 3 Wedges. 5. Remove the Deflection Yoke in the direction of arrow (B). 2 Wedge (B) (A)
1
Convergence · Purity Magnet Deflection Yoke Wedge Fig. 4-1 INSTALLATION Install new Deflection Yoke in reverse steps of REMOVAL. NOTE After adjusting the purity and the convergence, fix the screw 2 and lock the wedges.
B3-2
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 30 minutes before Power On or alternatively, discharge backup capacitor. Set Key VOL. (-) MIN Remocon Key 1 Operations 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". Releasing of PROTECTION PASSWORD.
VOL. (-) MIN
2
VOL. (-) MIN
3
VOL. (-) MIN
4
VOL. (-) MIN
5
VOL. (-) MIN
6
VOL. (-) MIN
7
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).
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 30 minutes before Power On or alternatively, discharge backup capacitor. 1. Set the VOLUME to minimum. 2. Press both VOL. DOWN button on the set and the Channel button (6) on the 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 30 minutes before Power On or alternatively, discharge backup capacitor. No need the setting for after INI 3F.
ADDRESS 00 01 02 03 04 05 06 07 08 09 0A 0B DATA 10 1E 04 6A 00 00 00 2F 40 60 02 08 ADDRESS 0C 0D 0E 0F 10 11 12 13 14 15 16 17 DATA 00 B3 35 66 FA 40 80 40 00 6A 00 35 ADDRESS 18 19 1A 1B 1C 1D 1E 1F 20 21 22 23 DATA A3 89 35 5F 05 F0 35 F2 00 00 00 00 ADDRESS 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F DATA 00 5F 01 F1 01 F0 0E 00 01 01 06 01 ADDRESS 30 31 32 33 34 35 36 37 38 39 3A 3B DATA 04 00 00 18 00 00 00 00 00 00 00 00 ADDRESS 3C 3D 3E 3F DATA 6C 2B 21 15
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 head 1 speed model, 4 head model) VHS Alignment Tape JG001E (VP 1 S-LI6 3 ) JG001F (VP 1 S-CO1 3 ) JG001R (VP 1 S-LI6 3 H) JG001U (VP 1 S-X6 3 ) (For 2 head 2 speed model) VHS Alignment Tape JG001C (VP 2 S-LI6 3 ) JG001D (VP 2 S-CO1 3 ) JG001V (VP 2 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
JG162C Cable (10 Pins) JG162D Cable (11 Pins) JG162Y Cable (5 Pins)
Tentelometer
Part No. JG001E JG001F JG001R JG001U JG001C JG001D JG001V JG002B JG002E JG002F JG005 JG153 JG022/JG024A JG100A JG154 JG162C/JG162D JG162Y
Remarks Monoscope, 6KHz (For 2 head 1 speed model, 4 head model) Color Bar, 1KHz (For 2 head 1 speed model, 4 head model) Hi-Fi Audio (For Hi-Fi model) X Value Adjustment (For 2 head 1 speed model, 4 head model) Monoscope, 6KHz (For 2 head 2 speed model) Color Bar, 1KHz (For 2 head 2 speed model) X Value Adjustment (For 2 head 2 speed model) 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 Used to connect the Syscon PCB and Main PCB Used to connect the Syscon PCB and CRT PCB
C5-1
PREPARATION FOR SERVICING
How to use the Servicing Fixture 1. Unplug the connector CP351, CP757, CP302 and CP403, then remove the TV/VCR Block from the set. 2. Unplug the connector CP810, CP820 and CP850, then remove the Main PCB from the VCR Block. 3. Connect as shown in the below figure using the Service Fixture. · Connect the Syscon PCB to the Main PCB with the cable JG162C and JG162D. · Connect the Syscon PCB to the CRT PCB with the cable JG162Y. 4. Remove the Operation PCB from the set, then connect it with the Syscon PCB. If necessary, connect CP351 (Front A/V Jack Input Terminal) 5. Short circuit between TP1001 and Ground with the cable JG154. (Refer to MAJOR COMPONENTS LOCATION GUIDE) The EOT, BOT and Reel Sensor do not work at this moment. 6. At that time, the STOP/EJECT button is available to insert and eject the Cassette Tape.
Front Cabinet CRT PCB CP850
CP820
Main PCB JG162Y
CP810 JG162D
CD850 JG162C
CD820 Syscon PCB
CD810
TP1001
CP757
JG154 To Ground
Operation PCB
CD757
CD351
C5-2
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 TP1002. (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
(A) Reel Disk Height Adjustment Jig (JG024A) 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)
1. Load a video tape (E-180) 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 60~100gf·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
Reel Disk
Master Plane (JG022)
(B)
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 70~100gf·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 Ass'y. 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 35~60gf·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 (JG001C or JG001E). (Refer to SERVICING FIXTURE AND TOOLS) 2. Connect CH-1 of the oscilloscope to TP4002 (Envelope) and CH-2 to TP4001 (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)
Torque Gauge/Adapter (JG002E/JG002B)
CH-1 Envelope (TP4002)
CH-1 Track CH-2 SW Pulse (TP4001)
CH-2 Track
S Reel Envelope
T Reel Ass'y
Fig. 1-4
(1) CH-3 Audio (2)
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 T Brake Spring/Tension Spring
Max
Fig. 2-1-A
Entrance
Exit
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 (JG001C or JG001E). (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. 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 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 TP4002, CH-2 to TP4001 and CH-3 to HOT side of Audio Out Jack. 6. Playback the VHS Alignment Tape (JG001U or JG001V). (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 TP4002, CH-2 to TP4001 and CH-3 to the Hi-Fi Audio Out Jack. 2. Playback the VHS Alignment Tape (JG001R). (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 2
1
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
12
11
10
9
1. Tension Adjust 7. P4 Post 2. Tension Arm 8. T Brake Spring 3. Guide Roller 9. T Reel Ass'y 4. P1 Post 10. Idler Ass'y 5. Audio/Control Head 11. S-S Brake Spring 6. X value adjustment driver hole 12. S Reel
D1-4
ELECTRICAL ADJUSTMENTS
1. ADJUSTMENT PROCEDURE
Read and perform these adjustments when repairing the circuits or replacing electrical parts or PCB assemblies. CAUTION When replacing IC's or transistors, use only specified silicon grease (YG6260M). (To prevent the damage to IC's and transistors.) On-Screen Display Adjustment 1. Unplug the AC plug for more than 30 minutes 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 display adjustment mode on the screen as shown in Fig. 1-1. NOTE Use the channel buttons (1-8) on the remote control to select the options shown in Fig. 1-1. Press the channel button (0) on the remote control to end the adjustments. 1. H/V 2. AKB 3. COLOR TEMP 4. PICTURE 5. OTHERS 6. TEST PATTERN 7. STEREO/SAP 8. (VOL TEST) 0. END Fig. 1-1
6.5H 6.5H CH-1 CH-2
Fig. 2-1-A
CH-2
CH-1
Fig. 2-1-B 2-2: RF AGC DELAY 1. Receive the monoscope pattern. 2. Connect the digital voltmeter between the pin 5 of CP603 and the pin 1 (GND) of CP603. 3. Activate the adjustment mode display of Fig. 1-1 and press the channel button (5) on the remote control. The Fig. 2-2 appears on the display. 4. Press the channel button (1) on the remote control to select "RF AGC DELAY". 5. Press the VOL. UP/DOWN button on the remote control until the digital voltmeter is 2.50 ± 0.05V (80dB). 1. RF AGC DELAY 2. VIDEO LEVEL 3. FM LEVEL 4. OSD H 5. CUT OFF 6. 7. 8. 0. RETURN
2. BASIC ADJUSTMENTS (VCR SECTION)
2-1: PG SHIFTER 1. Connect CH-1 on the oscilloscope to TP4001 and CH-2 to TP4501. 2. Playback the alignment tape. (JG001C) 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.
Fig. 2-2
2-3: VCO FREERUN 1. Connect the oscillator to pin 11 of TU601. 2. Connect the digital voltmeter to pin 47 of IC601. 3. Adjust the L608 until the digital voltmeter is 3.6 ± 0.05V.
(TV SECTION)
2-4: CONSTANT VOLTAGE (AC) 1. Using the remote control, set the brightness and contrast to normal position. 2. Connect the digital voltmeter to TP401. 3. Set condition is AV MODE without signal. 4. Adjust the VR502 until the DC voltage is DC 130 ± 0.5V. 2-5: CONSTANT VOLTAGE (DC) 1. Using the remote control, set the brightness and contrast to normal position. 2. Connect the digital voltmeter to TP401. 3. Set condition is AV MODE without signal. 4. Adjust the VR501 until the DC voltage is DC 130 ± 0.5V. D2-1
ELECTRICAL ADJUSTMENTS
2-6: CUT OFF 1. Place the set with Aging Test for more than 15 minutes. 2. Set condition is AV MODE without signal. 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 (5) on the remote control. The Fig. 2-2 appears on the display. 5. Press the channel button (5) on the remote control to select "CUT OFF". 6. Adjust the Screen Volume until a dim raster is obtained. 2-7: FOCUS 1. Receive the monoscope pattern. 2. Using the remote control, set the brightness and contrast to normal position. 3. Turn the Focus Volume fully counterclockwise once. 4. Adjust the Focus Volume until picture is distinct. 2-8: WHITE BALANCE NOTE: Adjust after performing CUT OFF adjustments. 1. Place the set with Aging Test for more than 15 minutes. 2. Receive the white 100% signal from the Pattern Generator. 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 (2) on the remote control to select "AKB". The Fig. 2-3 appears on the display. 5. Press the channel button (2) on the remote control to select the "R.BIAS". 6. Using the SET +/- keys on the remote control, adjust the R.BIAS. 7. Press the CH. UP/DOWN button on the remote control to select the "G.BIAS", "B.BIAS", "R.DRIVE" or "B.DRIVE". 8. Using the SET +/- keys on the remote control, adjust the G.BIAS, B.BIAS, R.DRIVE or B.DRIVE. 9. Perform the above adjustment 7 and 8 until the white color is looked like a white. 1. AKB AUTO 2. R. BIAS 3. G. BIAS 4. B. BIAS 5. R. DRIVE 6. G. DRIVE 7. B. DRIVE 8. AGC AUTO 2-9: SUB BRIGHTNESS 1. Receive the monoscope pattern. (RF Input) 2. Using the remote control, set the brightness and contrast to normal position. 3. Activate the adjustment mode display of Fig. 1-1 and press the channel button (4) on the remote control. The Fig. 2-4 appears on the display. 4. Press the channel button (1) on the remote control to select "BRIGHT". 5. Press the VOL. UP/DOWN button on the remote control until the white 25% is starting to be visible. 6. Receive the monoscope pattern. (Audio Video Input) 7. Press the AV button on the remote control to set to the AV mode. Then perform the above adjustments 2~5. 1. BRIGHT 2. CONTRAST 3. COLOR 4. TINT 5. SHARPNESS 6. OSD CONT 7. 8.
0. RETURN
Fig. 2-4
2-10: SUB COLOR 1. Receive the color bar pattern. (RF Input) 2. Connect the synchro scope to TP801. 3. Using the remote control, set the brightness, contrast and color to normal position. 4. Activate the adjustment mode display of Fig. 1-1 and press the channel button (4) on the remote control. The Fig. 2-4 appears on the display. 5. Press the channel button (3) on the remote control to select "COLOR". 6. Adjust the VOLTS RANGE VARIABLE knob of the oscilloscope until the range between white 100% and 0% is set to 4 divisions on the screen of the oscilloscope. 7. Press the VOL. UP/DOWN button on the remote control until the red level is set to the 4 divisions. (Refer to Fig. 2-5) 8. Receive the rainbow pattern. (Audio Video Input) 9. Press the AV button on the remote control to set to the AV mode. Then perform the above adjustments 2~7.
0. RETURN
Fig. 2-3 100%
0%
100% Fig. 2-5
D2-2
ELECTRICAL ADJUSTMENTS
2-11: HORIZONTAL PHASE 1. Receive the monoscope pattern. 2. Using the remote control, set the brightness and contrast to normal position. 3. Activate the adjustment mode display of Fig. 1-1 and press the channel button (1) on the remote control. The Fig. 2-6 appears on the display. 4. Press the channel button (1) on the remote control to select "H. PHASE". 5. Press the VOL. UP/DOWN button on the remote control until the SHIFT quantity of the OVER SCAN on right and left becomes minimum. 1. H. PHASE 2. H. BLK 3. V. SIZE 4. V. POSI 5. V. LIN 6. V. SC 7. V. COMP 8. (H FREQ) 2-15: OSD HORIZONTAL 1. Receive monoscope pattern. 2. Using the remote control, set the brightness and contrast to normal position. 3. Activate the adjustment mode display of Fig. 1-1 and press the channel button (5) on the remote control. The Fig. 2-2 appears on the display. 4. Press the channel button (4) on the remote control to select "OSD H". 5. Press the VOL. UP/DOWN button on the remote control until the difference of A and B becomes minimum. (Refer to Fig. 2-7)
[ TV ]
0. RETURN
OSD H Fig. 2-6 A B Fig. 2-7
2-12: VERTICAL SIZE 1. Receive the monoscope pattern. 2. Using the remote control, set the brightness and contrast to normal position. 3. Activate the adjustment mode display of Fig. 1-1 and press the channel button (1) on the remote control. The Fig. 2-6 appears on the display. 4. Press the channel button (3) on the remote control to select "V. SIZE". 5. Press the VOL. UP/DOWN button on the remote control until the horizontal over scan is equal to the vertical over scan. 2-13: VERTICAL LINEARITY 1. Receive the monoscope pattern. 2. Using the remote control, set the brightness and contrast to normal position. 3. Activate the adjustment mode display of Fig. 1-1 and press the channel button (1) on the remote control. The Fig. 2-6 appears on the display. 4. Press the channel button (5) on the remote control to select "V. LIN". 5. Press the VOL. UP/DOWN button on the remote control until the SHIFT quantity of the OVER SCAN on upside and downside becomes minimum. 2-14: VERTICAL POSITION 1. Receive the monoscope pattern. 2. Using the remote control, set the brightness and contrast to normal position. 3. Activate the adjustment mode display of Fig. 1-1 and press the channel button (1) on the remote control. The Fig. 2-6 appears on the display. 4. Press the channel button (4) on the remote control to select "V. POSI". 5. Press the VOL. UP/DOWN button on the remote control until the horizontal line of the monoscope comes to approximate center of the CRT. 2-16: VERTICAL LINEARITY 60 (AV)
1. Receive the monoscope pattern (Audio Video Input). 2. Using the remote control, set the brightness and contrast to normal position. 3. Activate the adjustment mode display of Fig. 1-1 and press the channel button (1) on the remote control. The Fig. 2-6 appears on the display. 4. Press the channel button (5) on the remote control to select "V. LIN". 5. Press the VOL. UP/DOWN button on the remote control until the horizontal line of the colour bar comes to approximate center of the CRT.
D2-3
ELECTRICAL ADJUSTMENTS
3. ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE (VCR SECTION)
TP1001
TP4002 TP4001
IC601
TU601 L608
J4501 TP4501
CP603
SYSCON PCB
D2-4
ELECTRICAL ADJUSTMENTS
(TV SECTION)
CRT PCB
FOCUS VOLUME SCREEN VOLUME
MAIN PCB
D2-5
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 color. 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
UPWARD/DOWNWARD RIGHT/LEFT SLANT 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
D2-6
MECHANICAL REPLACEMENT PARTS LIST
REF. NO. PART NO. 101 A54526M720 102 701 WPJA637 103 711 WP DA217 104 7230006762 105 713WPA0079 712WPJA449 106 107 743WKA0032 108 735WPJA087 109 755WNA0010 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 1 29 130 131 132 133 134 135 136 137 138 139 140 800WR00022 800WR00064 741WUA0013 753WSA0122 800WFAA003 --899EFB0692 ----------8995034000 761WPA0150 761WPA0164 753WSA0118 752WSA0144 753WUA0051 771WPA0232 752WSA0153 DESCRIPTION CABINET,FRONT ASS -Y CABINET,FRONT PLATE,FRONT SHEET,LED GUIDE,REMOCON FLAP SPRING,FLAP BUTTON,FRAME SHEET,PVC SHEET,CRT SUPPORT (A) SHEET,CRT SUPPORT (D) SPRING,EARTH PLATE,SPEAKER CUSHION COATING CLIP COATING CLIP EFB0692 HEAT SINK HEAT SINK HEAT SINK HEAT SINK METAL SPACER CORD CLIP UL CO. HOLDER,FBT HOLDER,DECK PLATE, EARTH-SYSCON SHIELD,CASE HEAD AMP SPRING,EARTH HEAD AMP PLATE,JACK PLATE,DECK SHIELD REF. NO. 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 ------------------PART NO. 8110630A04 8110630804 8121J50B54 810A130A04 8110630A24 810B130A04 810B130804 8109630802 810A130B04 810A130604 810A130504 8110330804 8110230A02 8107226604 8117540A64 8117540B04 8117140A24 8107630604 8107230804 SCREW,TAP TITE (P) SCREW,TAP TITE (P) SCREWTAPPING (B0) SCREW/WASHER (A) SCREW,TAP TITE (P) SCREW/WASHER (B) SCREW/WASHER (B) SCREW,TAP TITE (B) SCREW/WASHER (A) SCREW/WASHER (A) SCREW/WASHER (A) SCREW,TAP TITE (P) SCREW,TAP TITE (P) SCREW,TAP TITE (S) SCREWTAPPING (B0) SCREWTAPPING (B0) SCREWTAPPING (B0) SCREW,TAP TITE (S) SCREW,TAP TITE (S) DESCRIPTION BRAZIER BRAZIER GW20 BRAZIER BRAZIER 3x10 3x8 5x28 M3x10 3x12 M3x10 M3x8 3x8 M3x20 M3x6 M3x5 3x8 3x10 2.6x6 4x16 4x20 412 3x6 3x8 3x6
10x15xT4
FLAT BIND BIND TRUSS TRUSS PAN BRAZIER BIND BRAZIER
8110630604 SCREW,TAP TITE (P) JB5XD400 J4C10117 J4D11402 J5452601 J5452607 791MHA0002 792UHAA011 792UHAA012 793UCDA397 POLY BAG REGISTRATION CARD GUARANTEE CARD INSTRUCTION BOOK QUICK SET-UP SHEET LAMIFILM BAG PACKAGE,TOP PACKAGE,BOTTOM GIFT BOX
890PS70100 PUSH SPACER 761WPAA018 HOLDER,M/PCB 761WPAA019 HOLER,BACK 702UPA0139 CABINET,BACK 722426A018 SHEET,RATING 752WSA0148 SHIELD,CASE 752WSA0149 SHIELD,COVER 753WSA0120 PLATE, BOTTOM-EARTH 735WPJA092 BUTTON,POWER 752WSA0147 PLATE,SHIELD BOTTOM 752WSA0157 PLATE,POWER SW
CHASSIS REPLACEMENT PARTS LIST
REF. NO. 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 PART NO. 85OA500022 85OP200270 85OP900689 85OP500083 85OP800324 85OA000297 85OA200072 85OA200073 85OP600553 85OA200076 85OA300061 85OA300062 85OA400102 85OA400171 85OA400172 85OA400185 85OA400174 85OA400175 85OA400176 85OA400178 85OA600182 85OA600183 85OA900213 85OA900216 85OP200261 85OP200262 85OP200263 85OP200271 85OP200273 DESCRIPTION AHC ASS'Y BELT,CAPSTAN LEVER,REC BASE,AC HEAD SPRING,AC HEAD MAIN CHASSIS ASS'Y CLUTCH ASS'Y ARM, IDLER ASS'Y ARM,S-S BRAKE T REEL ASS'Y LOADING ARM S ASS'Y LOADING ARM T ASS'Y GUIDE ROLLER ASS'Y BASEJNCL S ASS'Y BASEJNCL T ASS'Y P5-2 ARM ASS'Y PINCH ROLLER BLOCK TENSION ARM ASS'Y TENSION BAND ASS'Y PINCH ROLLER LEVER ASS'Y BRAKE T ASS'Y CAP BRAKE ARM ASS'Y LINK ASS'Y LINK LEVER ASS'Y LEVER,CLUTCH RING,CLUTCH GEAR,CLUTCH REELS STOPPER,REEL S REF. NO. 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 CP101 CP102 H5001 H5002 ! M101 ! M2001 M2003 PCB550 Q101 Q102 ! UN4001 PART NO. DESCRIPTION 8107126AO4 SCREW,TAP TITE(S) PAN 2.6x10 8107226804 SCREW,TAP TITE(S) BIND 2.6x8 8107226604 SCREW,TAP TITE(S) BIND 2.6x6 8109126604 SCREW,TAP TITE(B) PAN 2.6x6 810A126804 SCREW/WASHER(A) M2.6x8 8108126404 SCREW/WASHER(B) M2.6x4 8102120604 SCREW,PAN M2x6 8102120304 SCREW,PAN M2x3 8102130304 SCREW,PAN M3.0x3.0 82Q3154C5N 82P266005N 82Q264713N 82P184505N 83ETW30000 810A123504 82A2675051 069R740018 0694220139 1523D91034 1543D02013 1596P78001 1594J98007 1589V11007 A4C70113550 0000700320 0000700320 A54508M500 POLYSLIDER WASHER POLYSLIDER WASHER(CUT) POLYSLIDER WASHER . POLYSLIDER WASHER(CUT) E-RING SEMS A WASHER CONNECTOR PCB SIDE CONNECTOR PCB SIDE HEAD (AUDIO CONTROL) HEAD (FULL ERASE) MOTOR (LOADING) CAPSTAN DD UNIT MICRO MOTOR DECK PCB ASS'Y TRANS ISTOR,PHOTO TRANS ISTOR,PHOTO CYLINDER UNIT ASS'Y 3.1x5.4xT0.25 2.6x6.0xT0.5 2.6x4.7xT0.13 1.8x4.5xT0.5 3.0 M2.3x5.0 2.6x7.5xT0.5 52044-0445 173979-2 HVMXA1072A HVFHP0032A MXN13FB11 H EP15BB EP14BD VE8851 RPT-38PB113 RPT-38PB113 A54508M500
85OP200274 SPACER,LINK LEVER 85OP300178 GEAR,MAIN LOADING 85OP300179 GEAR,LOADING S 85OP300180 GEAR,LOADING T 85OP300185 HOLDER,LOADING GEAR 85OP400472 ADJUSTTENSION 85OP400492 HOLDER,TENSION 85OP400474 LEVER,TENSION 85OP400475 COVER,P4 85OP600543 GEAR,JOINT 85OP600544 GEAR,MIDDLE 85OP600545 CAM,MAIN 85OP600546 CAM,P5 85OP600547 CAM,PINCH ROLLER 85OP600548 ROD,MAIN 85OP700035 REFLECTOR,LED 85OP800318 SPRING,LOADING GEAR 85OP800319 SPRING,P5 85OP800321 SPRING,BRAKE T 85OP800322 SPRING,TENSION 85OP800323 85OP800325 85OP800326 85OP800328 85OP800330 85OP800332 85OP900680 85OP900683 85OP900684 85OP900702 85OP900686 85OP900687 85OP900688 85OP900690 85OP900691 85OP900692 85OP900694 85OP900695 85OP900696 85OP600540 SPRING,CAP BRAKE SPRING,LOCKER SPRING,LINK SPRING,DAMPER SPRING,RING SPRINGS-S BRAKE OPENER,CASS CASS SIDE L CASS SIDE R TAPE GUIDE L(P,R) TAPE GUIDE R COVER,SENSOR L LEVER,FLAP CASS HOLDER LOCKER,L LOCKER,R SPRING,PACK BRACKET,TOP SPRING,CASS EARTH DRIVER,WORM
85OP400485 O-RING 85OP600541 WORM 85OP600542 BRACKETMOTOR
J2-1