Canon PC940 Service Manual - Page 362
D. Dc Controller Circuit Diagram
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S_OUT 2 13 Q102 +5V S_IN R102 R101 C101 +5V 1 23 S_CLK 2 13 Q103 +5V Q104 REQ Q152 R302 REQ* ACK +5V +5V R218 D202 R219 Q182 +5V R299 C162 +5V D201 TXD Q149 R301 RXD +5V +5V R211 D203 R210 Q183 C157 D200 +5V R300 26 P47 27 P30 28 P31 29 P32 30 P33 31 P34 32 P35 33 P36 34 P37 35 Vcc 36 P10 37 P11 38 P12 39 P13 40 P14 41 P15 42 P16 43 P17 44 Vss 45 P20 46 P21 47 P22 48 P23 49 P24 50 P25 2 PA7 100 PA6 99 PA5 98 PA4 97 PA3 96 PA2 95 PA1 94 PA0 93 Vss 92 P84 91 P83 90 P82 89 P81 88 P80 87 AVss 86 P77 85 P76 84 P75 83 P74 82 P73 81 P72 80 P71 79 P70 78 Vref 77 AVcc 76 ZER_CRS_LEVEL E0_BUCK FM1D D_L_2 R370 R372 R373 R374 MFSLD 5V 1 3 NF101 HEAT_PWM PU_SL SC_I_SEL1 SC_INA SC_INA* SC_INB SC_INB* R368 LNSLD PUSLD RGSLD 0 1 2 3 1 Vcc 2 PB0 3 PB1 4 PB2 5 PB3 6 PB4 7 PB5 8 PB6 9 PB7 10 RESO* 11 Vss 12 P90 13 P91 14 P92 15 P93 16 P94 17 P95 18 P40 19 P41 20 P42 21 P43 22 Vss 23 P44 24 P45 25 P46 4 C104 DIGIT D_L_1 RG_PD_CPU LS_HP_CPU ZER_CRS_EDGE 76543210 D. DC CONTROLLER CIRCUIT DIAGRAM DC Controller Circuit Diagram (1/8) 8 AD +5V C191 Q101 MD2 75 MD1 74 MD0 73 P66 72 P65 71 P64 70 P63 69 Vcc 68 XTAL 67 EXTAL 66 Vss 65 NMI 64 RES* 63 STBY* 62 PHAI 61 P62 60 P61 59 P60 58 Vss 57 P53 56 P52 55 P51 54 P50 53 P27 52 P26 51 R106 R105 R369 R270 C103 X101 C102 SC_HP_CPU RETRY_PD_CPU HEAT_ERR_CPU* +5V C192 R104 C202 R103 C218 REQ* SC_I_SEL3 SC_I_SEL2 STBY/CPY HEAT_OFF POWER_OFF* +5V M1_LOCK_CPU CPS_ACK_CPU* E0_DT 1 Q105 3 2 OUT VCC GND +5V C105 +5V R269 COMP_CLR Q157 M1_ON* SB_ON DV_AC_ON* DV_DC_ON* PR_DC_ON* CPS_REQ* SEG 8 01234567 01234567 C193 8 KEY ADF type only COPYRIGHT © 1999 CANON INC. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) A-7