Canon PC940 Service Manual - Page 370
E. Adf Controller Circuit Diagram
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WD D1 C3 + Q3 1 8 Ct RESET* 2 7 RESET Vs 3 6 Ck Vref 4 5 GND Vcc +5V C4 +5V R2 C5 +5V R3 X1 R4 C6 C7 JP1 R5 +5V R6 Q1 1 XTAL 2 EXTAL 3 MD1 4 MD0 5 NMI* 6 Vcc 7 STBY* 8 Vss A 9 P40/TMCI0 A* 10 P41/TMO0 B 11 P42/TMRI0 B* 12 P43/TMCI1 13 NC P44/TMO1 ACK 14 P45/TMRI1 15 NC P46/PHI REQ 16 P47/E 64 RES* 63 P66/IRQ2* 62 P65/IRQ1* 61 P64/IRQ0* 60 P63/FTI 59 P62/FTOB 58 P61/FTOA 57 P60/FTCI 56 P37/D7 55 P36/D6 54 P35/D5 53 P34/D4 52 P33/D3 51 P32/D2 50 P31/D1 49 P30/D0 RESET* PSW DIGIT3 DIGIT2 DIGIT1 DIGIT0 DIPSW1 DIPSW0 D7 D6 D5 D4 D3 D2 D1 D0 E. ADF CONTROLLER CIRCUIT DIAGRAM ADF Controller Circuit Diagram (1/3) 8 76543210 16 48 A0 0 P10/A0 47 A1 1 P11/A1 46 A2 2 P12/A2 45 A3 3 P13/A3 44 A4 4 P14/A4 43 A5 5 P15/A5 42 A6 6 P16/A6 41 A7 7 P17/A7 40 Vss 39 A8 8 P20/A8 38 A9 9 P21/A9 37 A10 10 P22/A10 36 A11 11 P23/A11 35 A12 12 P24/A12 34 A13 13 P25/A13 33 A14 14 P26/A14 +5V C9 Q2 1 28 VPP VCC 12 A12 2 27 A14 14 A12 A14 7 A7 3 26 A13 13 A7 A13 6 A6 4 25 A8 8 A6 A8 5 A5 5 24 A9 9 A5 A9 4 A4 6 23 A11 11 A4 A11 3 A3 7 22 A3 OE* 2 A2 8 21 A10 10 A2 A10 1 A1 9 20 A15 15 A1 CE* 0 A0 10 19 D7 7 A0 O8 0 D0 11 18 D6 6 O1 O7 1 D1 12 17 D5 5 O2 O6 2 D2 13 16 D4 4 O3 O5 14 15 D3 3 GND O4 P27/A15 P77/WAIT* P76/RD P75/WR* P74/AS* P73/IOS* P72/BUSY* P71/OS* P70/IS* P55/SCK1 P54/RXD1 P53/TXD1 P52/SCK0 P51/RXDO P50/TXDO Vcc 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 3 J1 4 J1 + C1 +5V R1 CP1 1 J1 C2 + CB1 2 J1 1 J6 2 J6 +24V ZD1 C21 +5V R45 Q11 ADFC TXD RXD DM0 DM1 WD LED ADFC PDP3 PDP2 PDP1 R44 NC NC A15 15 RD* +5V C8 C22 +5V HC14 14 VCC GND 7 Q6 +5V C10 COPYRIGHT © 1999 CANON INC. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) A-15