Service manual

A - 10
COPYRIGHT © 2001 CANON INC. CANOSCAN D1230U/D2400U REV.0 MARCH 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)
IV. MAIN PCB CIRCUIT DIAGRAM (CanoScan D2400U)
D5
F1
C80
C76
+
T1
C78
C77
+
J2
C79
+12V
+12VM
PS1
12
PS2
1
2
R76
+12V
MOTORGND
LAMPGND
PWRGND
+12VL +12V_VAROS
C87
C186
PS4
1
2
C133
U12
VI
GND
VO
EL9
PS3
12
C117
+
U17
VI
GND
VO
C88
C86
+
C132
DGND
AGND
+12V
AVCC
VCC
PWRGND
DGND
C81
C83
R52
U13
SW_C
1
SW_E
2
TC
3
GND
4
INV
5
VCC
6
IS
7
D_C
8
R49
L5
R50
C89
D6
R53
C84
+
C85
C82 +
U14A
12
147
R51 R74
PWRGND
PWRGND
PWRGND
ASIC_VCC
PWRGND
+12V
PWRGND
VCC3V
R61
R62
C98
C100
+
C101
R63
R64
U14B
3
4
147
C102
C97
R60
D8
C103
R59
C96
+
L7
Q11
U14C
5
6
14
7
C99
+
PWRGND
PWRGND
PWRGND
+18VP
DGND
+12V
VCC
PWRGND
VCC
DGND
PWRGND
R6 R7
Q13
PWRGND