Canon C2050, Service Handbook

Page: 79 / 292

CHAPTER 2 STANDARDS AND ADJUSTMENTS
2-19P
6 Adjusting Other Electric Parts
6.1 When Replacing the System Controller PCB
1) Open the printer unit front cover.
2) Check to make sure that all items identified by “S” on the service label attached to the
front cover carry values; otherwise, start service mode, and copy the missing values.
3) Turn off the main power switch, and disconnect the power plug.
4) Remove the problem system controller PCB.
5) Mount the new system controller PCB.
6) Detach the DIM ROM, image memory, and sub PCBs from the system controller PCB;
then, mount them to the new system controller PCB.
F02-601-01 (top view of the board)
If replaced, the version of the DIM ROM may prove to be incompatible; be
sure to upgrade the DIM ROM of the reader controller PCB, DC controller
PCB, and system controller PCB.
7) Assemble the machine to its initial state.
8) Connect the power plug, and turn on the power switch.
9) Execute the following: FUNCTION>CLEAR>S-CON. (Upon execution, the power will
automatically turn off.)
10) Turn on the main power supply.
11) Enter all items identified by “S” on the service label.
12) Close the printer unit front cover.
J214 J223 J220 J215
J201
J202
J204
J210
J211
1
2 9
10
1 2
5 6
10
9 2
1
1
2
10
11 2
1
8
7 2
1
1 2
5 6
1 12
4 1
5 1 4 1
167
168
83
84
85
86
1
2
167
168
83
84
85
86
1
2
167
168
83
84
85
86
1
2
A33
A34
B33
B34
A1
A2
B1
B2
B2 B1 A19 A20
B20 B19
A1 A2
A2 A1 B2 B1
A16 A15 B16 B15
A2 A1 B2 B1
A16 A15 B16 B15
B1 B2 A13 A14
B13 B14
A1 A2
A33
A34
B33
B34
A1
A2
B1
B2
A2
A1
B2
B1
A50
A49
B50
B49
D1
C1
B1
A1
D32
C32
B32
A32
J205
J206
J207
J203
J228
J208
J209
J218
J219
J226
J227
J222
J225
J224
J213
J229
72 1
1
2 5
6
1
2 11
10
8 1
SW1
ON
LED1
LED2
Image memory Sub PCB DIMM ROM