7-16
5-7. Poor Focus
.
Adjust Focus VR on FBT. (F1 and F2)
FBT, focus lead, CRT socket or CRT failure.
Check the dynamic focus voltage at TP-DF.
H. Dynamic focus voltage is approx. 580Vp-p.
V. Dynamic focus voltage is approx. 170Vp-p.
Check the waveform at CN-DSB pin 1.
Check the waveform at CN-DSB pin 2.
Check the waveform at IC513 pin 5.
Check the waveform at IC510 pin 10.
IC510 or its ambient circuit failure.
・
IC501,R527 or C520 failure.
・
Digital control circuit failure. (See item 12)
Check the waveform at CN-DF pin 3.
Check the waveform at CN-DF pin 4.
Q951 or its ambient circuit failure.
DEF PWB pattern failure.
Check the Q5X1 Emitter voltage and
confirm the voltage approx. -80V.
Q981~Q985, T981 or their ambient
circuit failure.
Q5X1, Q5X2 or their ambient
circuit failure.
V is NG.
H is NG.
Focus is poor all over the screen.
Focus performance is different at center and other parts of the screen.
NG
OK
NG
NG
NG
OK
OK
OK
OK
NG
NG
OK
OK
NG
・
IC501,R501 or C501 failure.
・
Digital control circuit failure. (See item 12)
IC513 or its ambient circuit failure.
Q987, T981 or their ambient circuit 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 ...
Page 267: ......
Page 268: ......
Page 269: ......
Page 270: ......
Page 271: ......
Page 272: ......
Page 273: ......
Page 274: ......
Page 275: ......
Page 276: ......
Page 277: ......
Page 278: ......
Page 279: ......
Page 280: ......
Page 281: ......
Page 282: ......
Page 283: ......
Page 284: ......
Page 285: ......
Page 286: ......