Circuit Board Repair; C204 Psb/Pse Board Repair - Epson DFX-8500 Service Manual

DFX-8500

5.2 CIRCUIT BOARD REPAIR

This section describes troubleshooting and repair procedures for the DFX-8500 circuit boards. By referring
to the checkpoints below, you can determine which component is defective and perform the proper repair
procedure. The tables have four columns:


Symptom: Common printer problems


Cause: Possible causes of each symptom


Checkpoint: Troubleshooting checks to help isolate your problem


Solution: Repair instructions

C204 PSB/PSE BOARD REPAIR

Table 5-4 describes the major components of the C204 PSB/PSE board. Table 5-5 contains troubleshooting
instructions.
Location
DB1
TY1
QF101
QF201
IC101
IC204
5-14
Table 5-4. C204 PSB/PSE Board Main Parts List
Description
Diode bridge
TRIAC
Switching FET for VP1 and VP2
Switching FET for VP3 and +5 VDC
PWM switching controller
+5 V regulator IC