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INTEGRATED CIRCUITS
IC101 TA87C-B6
IC102 CAT24CO4
IC301 TA1268N
IC311 NJ7809FA
TRANSISTORS
Q101 DTC143ZS
Q102 2SC945(P)
Q173 2SC945(P)
Q301 2SC945(P)
Q302 2SA733(P)
Q303 2SC945(P)
Q351 DTC143ZS
Q451 2SC1473A(R)
PICTURE TUBE
V451 37GDA86X
V451 370KSB22(SYB) CRT (SUFFIX B)
CHASSIS REMOVAL
1.
Remove 4 screws (183) from Cabinet Back (AB) and remove Cabinet Back from rear.
2.
Discharge anode lead at CRT chassis ground through a 10kohm resistor.
3.
Disconnect anode lead from CRT.
4.
Disconnect CRT Socket P.C. board (PCB-2) from CRT(V451).
5.
Disconnect 3 connectors (CN501 (DY501), CN601 (L601) and LCN801) from Main P.C.
board (PCB-1).
6.
When replacing chassis, reverse the above procedure making certain that all leads are
fastened in their original places.
CRT REMOVAL
CAUTION: Wear shatterproof goggles and exercise proper handling precautions when working
around high vacuum picture tubes.
1.
Remove chassis per instructions under CHASSIS REMOVAL.
2.
Remove Convergence Magnet Assembly (MG451) from neck of CRT.
3.
Remove Deflection Yoke (DY501) from neck of CRT
4.
Remove 3 wedges (158) from CRT
5.
Remove Degaussing Coil (L601) from CRT
6.
Remove braid wire (331) and spring (157) from CRT
7.
Lay cabinet face down on some protective material.
8.
Remove 4 CRT mounting screws (174).
9.
Remove CRT from Cabinet Front (AA).
10. To install new CRT, reverse above procedure.
11. Perform purity and convergence adjustments.
IC, TRANSISTOR AND CRT COMPLEMENT
Microcomputer
EEPROM
IF/Video/Chroma/Deflection
Voltage Regulator
Vertical Synchronizing
Horizontal Synchronizing
SD Signal Buffer
SIF Signal Buffer
Video Buffer Amplifier
Video Out
Service Mode Switching
Red Color Driver
CRT (SUFFIX A)
IC501 AN5512
IC601 STR30130
IC671 NJ7805LD
Q452 2SC1473A(R)
Q453 2SC1473A(R)
Q551 2SC1473A(R)
Q552 2SD 1 877
Q601 2SC945(P)
Q801 2SC945(P)
Q802 2SA950(0)
Q803 2SC2120(0)
V451
A34JFQ90X
V451
A34JXV70X
- 5 -
Vertical Deflection Output
AVR
Voltage Regulator and Reset
Blue Color Driver
Green Color Driver
Horizontal Driver
Horizontal Driver
Power On/Off Relay Driver
Audio Amplifier
Audio Amplifier
Audio Amplifier
CRT (SUFFIX C)
CRT (SUFFIX D)
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