Canon CanoScan N656U Service Manual - Page 88

APPENDIX III. MAIN PCB CIRCUIT DIAGRAM (CanoScan N650U/N656U) (1/3) COPYRIGHT © 2000 CANON INC. CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON) R18 VOB TP4 C3 C2 REN GEN BEN A0 R1 +5VD TR PHI1 (AGND) C4 C5 C6 C7 (AGND) +5VD R9 RA1 A1 1 8 A2 2 7 A3 3 6 A4 4 5 RA2 A5 1 8 A6 2 7 A7 3 6 A8 4 5 RA3 1 8 2 7 3 6 4 5 1 6 20 16 17 A0 A1 18 A2 19 22 23 24 25 26 A3 A4 A5 A6 A7 A8 13 27 14 29 28 WE OE RAS LCAS HCAS GND GND GND VCC VCC VCC U3 NC NC NC NC 11 12 15 30 I/O0 I/O1 I/O2 I/O3 I/O4 I/O5 I/O6 I/O7 I/O8 I/O9 I/O10 I/O11 I/O12 I/O13 I/O14 I/O15 2 3 4 5 7 8 9 10 31 32 33 34 36 37 38 39 C1 21 35 40 (DGND) (A0 A9) 14 18 20 22 24 26 28 32 33 29 27 25 23 21 19 15 DB0 DB1 DB2 DB3 DB4 DB5 DB6 DB7 DB8 DB9 DB10 DB11 DB12 DB13 DB14 DB15 A0 A1 A2 A3 A4 A5 A6 A7 A8 40 42 46 48 49 47 45 41 39 38 A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 35 37 36 34 WR RD RAS CAS VA 9 99 VA VA 8 100 AGND AGND CP2 CP1 RS PHI2 PHI1 TR2 TR1 79 78 77 76 75 74 73 82 VREG +5VD VREG 56 62 68 86 97 VD VD VD VD VD OS R OS G OS B 3 5 7 NS-USB VBANDGAP VREF LO VREF MID VREF HI TEST 1 2 4 6 96 16 30 43 VDRAM VDRAM VDRAM +5VD 17 31 44 57 61 69 81 87 98 DGND DGND DGND DGND DGND DGND DGND DGND DGND LAMP R LAMP G LAMP B 58 59 60 CMODE 91 88 89 92 NC NC NC U2 A A 10 11 B 12 B 13 SENSE A 94 SENSE B 93 SENSE GND 95 PSENSE#1 64 PSENSE#2 63 MISC I/O #1 MISC I/O #2 MISC I/O #3 65 66 67 MISC I/O #4 70 MISC I/O #5 71 MISC I/O #6 72 D+ D- 84 83 SCL SDA 51 50 RESET 90 BP 85 ACTIVE/SUSPENDED 80 EXT CLK/CRYSTAL 24/48 54 55 CRYSTAL OUT CRYSTAL IN 52 53 C27 C28 C29 C31 (DGND) RA4 1 8 2 7 3 6 4 5 SENA SENB +5VD (MOTOR GND) HPSEN SCANSW MISC2 MISC4 MISC5 MISC6 D+ D- R91 R90 +5VD R17 R21 R14 R19 MA+ MAMB+ MB- TP9 TP R15 C35 R10 TP7 TP R12 R11 Y1 TP3 (DGND) TP8 FB1 5 SDA 6 SCL 1 2 3 A0 A1 A2 TP10 +5VD 8 VCC GND WP 4 7 C8 C91 C19 C20 (DGND) C21 C9 C10 C11 C14 C15 C16 C17 C18 (DGND) (AGND) (DGND) A - 3