CTX CMS-3435 - Board-Specific Service Routines; Power Board Troubleshooting

A. POWER BOARD SERVICE ROUTINE
POWER INDICATOR LED OFF
POWER CORD
NO
OK
R101,
7101
DOES
AC
APPEAR
ON
BD101
|
AC
FILTER
POWER SW.
FAILURE
BD101, C101 ~ C104
C105 ~ 107, R102, 103, Q101, Q102
DOES DC 320V APPEAR
ON BD101 +/- PIN
DRIVER PART & FEEDBACK LOOP
COMPONENTS !C101 (PHOTO COUPLER)
VR101, R110
CHECK G O/P
95V/21V/12V/6V
CHECK RESPECTIVE LOAD
CHECK 200V ON
C118
CIRCUIT
OF
EACH
VOLTAGE
D108, C118, Q107
C128
Q107, Q106, C128, Q124, Q105
Q108, ZD104, SYNC ON F2
FEEDBACK ON D2, R131,127
R133, R140,L104,C131
CHECK CONNECTOR D
D1 FOR 50V ~ 120V
CHECK HORIZONTAL
DEFLECTION CKT
OK
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