3-25
ELECTRICAL TROUBLESHOOTING GUIDE
1. POWER SUPPLY ON SMPS BOARD
YES
YES
YES
YES
YES
No output 5.1 VA
No 12 V
Power line of MAIN PCB is short.
Replace F901 (same fuse).
Check or replace D963.
Is D960, D961 normal?
Replace BD901.
Check P_CTL from
μ
-com.
Check IC951 and replace.
Or
check line of MAIN PCB is short or not.
Check or replace D960, D961.
NO
NO
NO
NO
NO
Is the F901 normal?
Is the
VCC 12 VA supplied to IC951
pin1?
Is the VCC
(11 V ~ 25 V) supplied to IC901
pin4?
Is BD901 normal?
Is there
‘HIGH’ signal at IC951
pin4?
Summary of Contents for CJ87
Page 17: ...1 16 ...
Page 19: ...2 2 ...
Page 21: ...2 6 2 5 ...
Page 23: ...2 8 A60 3 SPEAKER SECTION FRONT SPEAKER ...
Page 69: ...3 40 ...
Page 73: ...3 47 3 48 PRINTED CIRCUIT BOARD DIAGRAMS 1 SMPS P C BOARD DIAGRAM TOP VIEW ...
Page 75: ...3 51 3 52 2 MAIN P C BOARD DIAGRAM TOP VIEW ...
Page 76: ...3 53 3 54 MAIN P C BOARD DIAGRAM BOTTOM VIEW ...
Page 77: ...3 55 3 56 3 FRONT P C BOARD DIAGRAM TOP VIEW ...
Page 78: ...3 57 3 58 FRONT P C BOARD DIAGRAM BOTTOM VIEW ...
Page 79: ...3 59 3 60 4 JACK P C BOARD DIAGRAM TOP VIEW BOTTOM VIEW ...