Epson AcuLaser C1900, Service Manual

Page: 148 / 270

EPSON AcuLaser C1900/AcuLaser C900 Revision B
Troubleshooting Status Display (AcuLaser C900) 148
ERROR CODE: 6023 “DEVELOPING RACK ROTATION ERROR”
†
Detection Timing
When the Toner Cartridge Rack does not turn.
†
Solution
„
Electric parts which can cause the trouble:
•
Rack motor (M2)
• Rack Clutch (CL1)
• Rack Black Position Detection Sensor (PC4)
• Engine Board (PWB-A)
ERROR CODE: 6024 “FUSING ROLLER / WARMING UP ERROR”
ERROR CODE: 6025 “FUSING ROLLER / LOW TEMPERATURE ERROR”
†
Detection Timing
When 80C is not reached in 100 seconds after start of warming up.
When the fusing roller temperature has dropped and remained below 70C for 10
seconds during standby.
†
Solution
„
Electric parts which can cause the trouble:
•
Fusing Roller Heater Lamp (H1)
•
Pressure Roller Heater Lamp (H2)
•
Thermostat (TS1)
•
Engine Board (PWB-A)
• Power Supply Unit (PU)
Table 3-31.
Step Action Refer to
WARNING DIAGRAM
Control Signal
1 Check the operation of PC4. p.162 PC4_ON
2 Check the operation of M2. p.163 CL1_REM
3 Check the operation of CL1. p.163 -
4 Replace the PWB-A. - -
Table 3-32.
Step Check Item
Yes/
No
Remedy
WARNING
DIAGRAM
Control Signal
1 Check the continuity of H1
and H2. NO Replace the H1, H2. -
2 Check the continuity of TS1. NO Replace the TS1. -
3 Check to see if the resistance
of TH1 is infinite.
(Between CN18-1 and 2 on
thermistor side) YES Clean TH1 or replace
the Fuser Unit.
HEATER
NO Replace the PU.
Replace the PWB-A.