Service manual

Chapter 13
13-65
*1: If equipped with printer functions.
*2: If equipped with fax functions.
13.3.5 Variable Resistors(VR), Light-Emitting Diodes(LED),and Check Pins by
PCB
13.3.5.1 Variable Resistors, Light Emitting Diodes (LED), and Check Pins by PCB 0006-4259
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.
13.3.5.2 Image Processor PCB 0007-2026
F-13-13
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 printer functions.
J309
J310 J311
*1
J312 J314 J316
J317
J318
*2
VR901
J319
*3
J301J302
J303
J307
JP1
BAT1
BAT2
J11
J308
J305 J315
J304
J320
*3