Canon PC920 Service Manual - Page 379
Composite Power Supply Circuit Diagram [A507] 6/8, JP301, <A508>, T_REV_R, T_FW_S, HV_LIMIT
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Composite Power Supply Circuit Diagram [A507] (6/8) T_FEEDBACK VR301 R361 C377 R318 R327 C359 D306 +24VR T_FW_DRV D308 R336 Q310 + C318 5 1 6 +24VR 2 T302 R338 R328 R329 R330 R337 C312 T_FW_ON CLK32K Q308 D307 R390 Q325 7 7 R332 R317 C342 C322 HV_LIMIT C379 C381 Q311 R392 ZD303 R393 C317 T_FW_S R326 D324 D322 D340 D339 D341 D342 D343 D344 12 HV_H T101 HV_L 11 JP301 C346 R351 R352 R353 R354 R355 R356 C345 D326 +5V D323 D325 C343 C344 Q321 R388 C321 T_REV_ON* C380 C382 T_REV T_REV_R J210 Transfer output D328 C329 A-24 COPYRIGHT © 1999 CANON INC. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
A-24
COPYRIGHT
©
1999
CANON INC.
CANON
PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
Composite Power Supply Circuit Diagram [A507] (6/8)
JP301
C346
C345
+5V
R351
R356
Q321
D325
C344
C343
C321
C380
C382
C381
C379
C322
C342
<A508>
T_REV_R
T_FW_S
HV_LIMIT
<A508>
<A508>
<A508>
T_FW_DRV
T_FEEDBACK
T_FW_ON
<A508>
CLK32K
<A508>
<A508>
R393
R392
R317
R390
+24VR
C377
R361
R327
T302
J210
Transfer output
5
6
2
7
7
1
D306
+24VR
R328
R338
R329
R330
R337
R332
ZD303
R326
C317
Q311
Q325
Q310
C318
D308
R318
C359
VR301
R336
Q308
C312
D307
T_REV_ON*
T_REV
R352
R353
R354
R388
D328
D323
D324
D322
D340
D341
D342
D343
D344
D339
C329
R355
HV_H
<A503>
HV_L
<A503>
D326
T101
+
11
12