7-23
7. V OSC / DEF CIRCUIT FAILURE
Measure the voltage at CN-K pins K2 and K4 on the DEF PWB (PWE-624)
Pin K2 voltage is approx. 14.5V. Pin K4 voltage is approx. -15.6V.
NG
OK
NG
OK
NG
Check sync pulse (VD) at CN-DSB pin 6 on the DEF PWB
(PWE-624)
NG
OK
NG
OK
OK
Check +15V/-15V line.
・
CN-K wire failure.
・
Check SW REG. (see item 13)
Check the sawtooth wave at IC421 pin 8 on the DEF PWB (PWE-624).
Check the sawtooth wave at CN-DSB pin 11 on the DEF PWB (PWE-624).
IC421 or its ambient circuit failure.
Check the vertical input trigger.
Check the unstable picture (see item 3-2)
Check the sawtooth wave at IC511 pin 12.
IC511 or its ambient circuit failure.
・
IC501 failure.
・
Digital control circuit failure (see item 12)
・
IC401 or its ambient circuit failure .
・
V DY failure.
Summary of Contents for MultiSync FP1370
Page 13: ...4 4 REMARK SYMBOL Mount the EMF PWB 121E REMARK SYMBOL Clamp the connector ...
Page 14: ...4 5 REMARK SYMBOL COIL FORMING UPPER SIDE REMARK SYMBOL COIL FORMING LOWER SIDE ...
Page 23: ...4 14 REMARK SYMBOL REMARK SYMBOL Clamp CN CA CN CC and CN D with CLAMPER WIRE ...
Page 26: ...4 17 REMARK SYMBOL Clamp the wires SAFETY REMARK SYMBOL Clamp the wires CN ASD CN AF 21 ...
Page 80: ...5 51 Fig 3 11 CONV PWB Fig 3 12 EMF PWB CN EMF CN LL CN RR CNEM CN CA CN D CN CCB HS8N1 ...
Page 143: ...8 18 15V 80V AFC D FOCUS Fig 3 1 HIGH VOLTAGE CIRCUIT AND PROTECTOR CIRCUIT ...
Page 260: ...10 1 ...
Page 261: ...10 2 ...
Page 262: ...10 3 ...
Page 263: ...10 4 ...
Page 264: ...10 5 ...
Page 266: ...for Human Potential ...
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