Canon BJC-55 Service Bulletin page 207

BJC-50
1 2
Vcc1
R95 R96
0.39,1/2W 0.39,1/2W
C70 R97
R94
0.1µ,25V 1.6K,1/16W
10K,1/16W
CRREF2
<02-A4>
BCRM
<02-A5>
BCRM
<02-A5>
1 2
Q22
3
2
R102 C71 C72
MTSTB 3 15K,1/16W 0.01µ,50V 0.1µ,25V
<02-A4>
Q23
1
WHEAT
<02-A4>
TOPC
<02-F3>
ALFM
<02-C1>
ALFM
<02-C1>
LF-PRT
<01-D10>
D12
R107
C78
1µ,10V 0.68,1/2W
MCHE1
<02-A4>
V2-ON
<02-F1>
MCHE0
<02-A4>
V3-ON
<02-F6>
BLFM
<02-C1>
BLFM
<02-C1>
3 4 5
Vpp
Carriage Motor Driver
IC12
1 20
OA VM
2 19
OA OB
3 18
SGA OB
R99
4 17
Sen.A SGB
0.39,1/2W
5 16
GND GND
6 15
R98
GND GND
7 14 1.6K,1/16W
VrefA Sen.B
8 13
PhA VrefB
9 12
PhA PhB
10 11
Sth. PhB
C74 C75 R103 C76
0.1µ,25V 33µ,25V 15K,1/16W 0.01µ,50V
Paper Feed Motor Driver VH
IC15
ZD12
1 16 W-HT
<02-B7>
I1 O1
2 15 TOPCC
I2 O2 <02-C7>
3 14
I3 O3
4 13
I4 O4
5 12
I5 O5
6 11
I6 O6
7 10
I7 O7
8 9
GND COM
IC16
1 16
MCH1
I1 O1 <02-B7>
2 15 V2-ONC
<01-D8>
I2 O2
3 14 MCH0
<02-B7>
I3 O3
4 13
V3-ONC
I4 O4 <01-C10>
5 12
I5 O5
6 11
I6 O6
7 10
I7 O7
8 9
GND COM
6 7
CNCR1
4 B
3 B
1 A
2 A
R100
0.39,1/2W
C73
R101
0.1µ,25V
10K,1/16W
CRREF1
<02-A4>
ACRM
<02-A5>
ACRM
<02-A4>
X3
32.768KHz
T-OE
<02-A4>
Vcc1
E-OE
<02-A4>
TE-CLK
<02-A4>
R105 R77
5.6K,1/16W 0.01µ,50V
VH
TE-DIO
<02-A4>
CNLF1
1 COM
3 A
4 A
2 B
5 B
<01-F3> PES
<02-F3>
Vcc1
R108
Q24
18K,1/16W
2
HPS
<02-F3>
1
8 9 10
CONTROL PCB ASS'Y 05
TIMER IC Vcc1
IC13
R104
10K,1/16W
1 8
tpout vdd
2 7
xout sio
3 6
xin sck
4 5
vss cs
D11
Vcc1
EEPROM(2M)
IC14
R106
10K,1/16W
1 8
NC NC
2 7
Vcc GND
3 6 E-DO
<02-A4>
CS DO
4 5
SK DI
CP2
CP1
CNSEN1
6
7
1
Vcc1
R79 R109
0.01µ,50V 18K,1/16W 2
Vcc3
5
R111
220,1/16W
3
4
R110 R112 C80
22K,1/16W 100K,1/16W 1000p,50V
3
R113
180,1/10
Part 5: Maintenance
A
B
C
D
E
F
G
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