Variable Resistors, Light Emitting Diodes (Led), And Check Pins By Pcb; Image Processor Pcb - Canon iR1200 Series Service Manual

6.3 Variable Resistors, Light Emitting Diodes (LED), and
Check Pins by PCB
Of the VRs, LEDs, and check pins used in the machine, those needed when servicing in
the field are discussed:
1. Some LEDs emit dim light even when OFF; this is a normal condition,
and must be kept in mind.
2. VRs that may be used in the field:
VRs that must not be used in the field:
Do not touch the VRs and check pins not found in the lists herein; they are
exclusively for the factory, and require special tools and high accuracy.

6.3.1 Image Processor PCB

J309 J310 J311
J352
J308
J351
JP1: jumper plug for power used by battery to back up memory (control data; user data, service
mode data).
BAT1: battery used to back up memory (SRAM; control data; service mode data, user mode data).
BAT2: battery used to back up memory (SDRAM; fax images)
*1: If equipped with ADF functions.
*2: If equipped with fax functions.
COPYRIGHT © 2002 CANON INC.
*1
J312 J314
BAT2
J11 BAT1
F07-603-01
2000 2000 2000 2000 CANON iR1200/iR1300 Series REV. 0 AUG. 2002
CHAPTER 7 TROUBLESHOOTING
J315
J316
JP1
J304 J307
J303
J317
J318
VR900
*2
J81
*2
J321
*2
J320
J302 J301
7-109