Service manual

45
13VT-N100
13VT-N150
13VT-CN10
NO
NO NO NO NO
NO
NO
NO
DRUM SERVO TROUBLESHOOTING FLOW CHART NO.1-10
Drum servo does not function.
YES YES
YES
YES
YES
YES YES YES
See FLOW CHART NO. 1-8.
Is pin (84) of IC2001 in high impedance?
Replace IC2001.
Replace IC2001.
Check X7701, C7707 and C7706.
Check the signal line of drum PG.
Is there 16MHz oscillation at pins (38) and (39) of IC2001?
Is there the drum PG signal at pin (90) of IC2001?
Check the composite sync. signal at pin (41) of IC401, Q404 and Q428.
Is there the head switching pulse at pin (18) of IC2001?
Is there the drum FG signal at pin (89) of IC2001?
Is there the drum control output at pin (77) of IC2001?
Check the signal line between pin (7) of AD and pin (84) of IC2001.
Check PG and FG to pins (5) and (3) of the connector ME and the drum motor.
Is there the drum control voltage applied to pin (1) of ME connector?
Check AT 12V at pin (4) and AT 5V at pin (7) of ME connector. Check and replace the drum motor.
Is there the reference signal (V-sync.) at pin (56) of IC2001?
In REC modeIn PB mode