Variable Resistors (Vr), Light-Emitting Diodes (Led), And Check Pins By Pcb; Dc Controller Pcb - Canon 1000 Service Manual

7. TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS
H. Variable Resistors (VR), Light-Emitting Diodes (LED), and
Check Pins by PCB
Of the variable resistors (VR), light-emitting di-
odes (LED), and check pins used in the CLC1000,
those that are needed when servicing the machine
in the field are discussed.
1. Do not touch the VRs and check
pins that are not mentioned herein;
they are for factory use only and
require special instruments and
high precision for adjustment.
2. Some LEDs emit light because of
leakage current; this is a normal
condition and must be kept in mind.
3. VRs that may be used in the field
VRs that must not be used in the field

1. DC Controller PCB

J2213 B1
B11 B15
A1 A11 A1
VR2201
VR2203
J2221 A11
8 1
B1
7-170
COPYRIGHT © 2001 CANON INC.
. . .
. . .
J2212 B1 J2239 B1 J2210 B1
B8 B12
A15 A1 A8 A1
J2227
1 11
LED2205
VR2202
VR2204
J2232
1 8
LED2211
J2211 A1 J2222 A1
A12
A15
B1
B12
B11 B1
J2209 B1 J2208 B1
B15 B12
A12 A1 A15 A1
1
J2228 B1
B13
LED2206
A1 A13
J2229 B1
B14
A1 A14
B34
B33
A34
A33
A1
A2
B1
B2
J2231
1 9
J2223 A1
A14 J2224 A1 A12
B15 B1 B14 B1
Figure 7-611
CANON CLC1000/1000S/3100 REV.2 MAY 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)
J2207 B1 J2206 B1
B15 B10
A12 A1 A15 A1
J2223
3
LED2207 LED2208 LED2209
LED2210
J2236
B2
B1
A2
A1
J2235
A39
A40
B39
B40
J2230
1 6
LED2212
J2226 A1
J2225 A1 A14
J2234
B12 B14 1
B1
A10
11