Canon PC921 Service Manual - Page 365
DC Controller Circuit Diagram 4/8, SERVICE, HEAT1, KEY<7..0>, CPM1], 10CPM, SIZE0], AB/inch
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Page 365 highlights
DC Controller Circuit Diagram (4/8) KEY 8 0 R134 1 R133 2 R132 3 R131 4 R130 5 R129 6 R128 7 R127 8 0 KR0 1 KR1 2 KR2 3 KR3 4 KR4 5 KR5 6 KR6 7 KR7 R228 C168 R235 C175 R234 C174 R233 C173 R232 C172 R231 C171 R230 C170 R229 C169 A-10 DIGIT 5 0 R138 1 R137 2 R136 3 R135 SEG 8 4 R360 03 13 23 33 43 53 63 73 2 Q113 1 2 Q114 1 2 Q115 1 2 Q116 1 2 Q117 1 2 Q118 1 2 Q119 1 2 Q120 1 R236 R239 R238 R237 R362 +5V Q121 +5V Q124 +5V Q123 +5V Q122 +5V Q202 DIG0 DIG1 DIG2 DIG3 DIG4 SEG0* SEG1* SEG2* SEG3* SEG4* SEG5* SEG6* SEG7* R240 R243 R242 R241 R358 2 3 2 7 3 5 KR6 [CPM0] 12 D102 12 D113 12 D218 12 D109 12 D108 12 D106 12 D115 KR6 [CPM1] 12 D114 HEAT0 HEAT1 SERVICE SFPD DPD CDP DIG0 DIG1 10CPM 12/13CPM D114 KR2 [SIZE0] KR5 [SIZE1] 12 D103 12 D190 KR3 [VOL1] D214 DIG3 DIG0 AB/inch inch D103 D190 DIG4 D214 120V 220/240V COPYRIGHT © 1999 CANON INC. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)