Service manual
Table Of Contents
- 1. Introduction
- 2. The RA-3/3A Chassis
- 3. RA-3/3A Power Supply Troubleshooting
- 4. RA-3/3A Shutdown and Self-Diagnostics
- 5. RA-3/3A Deflection Circuits
- 6. RA-3/3A Video Process Troubleshooting: T & S Models
- 7. Troubleshooting the RA-4 Chassis
- 8. RA-4/4A Power Supply Troubleshooting
- 9. RA-4/4A Protect Circuit Troubleshooting
- 10. RA-4/4A Deflection Circuit Troubleshooting
- 11. RA-4/4A High Voltage Circuit Troubleshooting
- 12. RA-4 Video Troubleshooting
- 13. Troubleshooting the RA-4A Chassis
- 14. RA-4A Video Circuit Troubleshooting
- 15. Troubleshooting the RA-5A Chassis
- 16. RA-5A Power Supply Troubleshooting
- 17. RA-5A Protect Circuit Troubleshooting
- 18. RA-5A Deflection Circuit Troubleshooting
- 19. RA-5A High Voltage Circuit Troubleshooting
- 20. RA-5A Video Path Troubleshooting
- 21. Troubleshooting the RA-6 Chassis
- 22. RA-6 Power Supply Troubleshooting
- 23. RA-6 Protect Circuit Troubleshooting
- 24. RA-6 Deflection Circuit Troubleshooting
- 25. RA-6 High Voltage Circuit Troubleshooting
- 26. RA-6 Video Circuit Troubleshooting
- 27. Troubleshooting the AKB Circuits
- 28. Auto Registration Troubleshooting
- 29. Model-to-Chassis Cross Reference
15
5. RA-3/3A Deflection Circuits
TO A
BOARD
IC206
PIN 43
H+
H-
DYR
1
4
2
6
7
5
3
10
9
8
2
1
4
6
3
1
5
T504 FBT
CN506
CN505
CN504
C541
C549
R532
C542
C531
D532
L504 HLC
T502
PMT
R594
C550
R544
-4V
+4V
C547
C543
L505
TO HY
BLOCK
TO
ABL
TO
FOCUS
PACK
D528
R586
R566
R598
G BOARD
+
-
-
+
200V
135V
TO
HEATERS
+12V
-12V
FROM
Q502
H OUT
COLLECTOR
TO D518,
L503,
Q503,
PIN AMP.
1 1
4 4
1 1
4 4
1 1
4 4
FIGURE 5-1B - HORIZONTAL DEFLECTION (PART 2)
C546
5.1BTVP14 1451 7/17/02
DYG
DYB
2
1
R538R536
6
1
7
C516
+
R584
D522
R548
C536
CN502
R545
IC502
R511
135V
D507
D506
7.5V
R522
+
-
High Voltage and Horizontal Deflection Troubleshooting
Three major issues usually arise when a failure occurs in this circuit. Either the horizontal output transistor fails,
the high voltage protect circuit engages or pincushion problems develop.
Horizontal Output Transistor Failure: Occasionally, you will be fortunate to have the output transistor fail and
nothing else is the cause. Many times, however, you end up losing the newly installed transistor. In the worst
case, this will cause the power supply switching transistors to fail. Always treat a shorted horizontal output as
though something else caused it to fail. The use of a variac and an oscilloscope will help insure this.