Epson AcuLaser C1900, Service Manual

Page: 149 / 270

EPSON AcuLaser C1900/AcuLaser C900 Revision B
Troubleshooting Status Display (AcuLaser C900) 149
ERROR CODE: 6026 “FUSING ROLLER / HIGH TEMPERATURE ERROR”
ERROR CODE: 6027 “FUSING ROLLER / THERMISTOR ERROR”
†
Detection Timing
When the Fusing Roller temperature is 220
°
C or higher for 0.1 second.
When between 40 seconds and 50 seconds after start of warming up of the Fusing
Roller, the Fusing Roller temperature does not rise for one second by 5
°
C from that at
start of fuser warming up.
†
Solution
„
Electric parts which can cause the trouble:
•
Thermistor (TH1)
• Engine Board (PWB-A)
ERROR CODE: 6033 “TRANSPARENCY DETECTION SENSOR ERROR”
†
Detection Timing
Transparency is not detected.
†
Solution
„
Electric parts which can cause the trouble:
•
OHP Sensor (PC3A)
• Engine Board (PWB-A)
EEPROM ERROR
· ERROR CODE: 6041 “MEMORY COUNTER ERROR”
· ERROR CODE: 6042 “MEMORY DATA ERROR”
· ERROR CODE: 6043 “MEMORY ACCESS ERROR”
· ERROR CODE: 6044 “MEMORY INSTALLATION ERROR”
†
<Detection Timing>
EEPROM error detection
†
Solution
„
Electric parts which can cause the trouble:
• EEPROM
• Engine Board (PWB-A)
Table 3-33.
Step Check Item
Yes/
No
Remedy
WARNING
DIAGRAM
Control Signal
1 Check to see if TH1 is
shorted.
(Between CN18-1 and 2 on
thermistor side) YES Clean TH1. HEATER
Replace the Fuser Unit.
NO Replace the PU.
Replace the PWB-A.
Table 3-34.
Step Action Refer to
WARNING DIAGRAM
Control Signal
1 Check the operation of PC3A. p.162 PC3_REM
2 Replace the PWB-A. - -
Table 3-35.
Step Action Refer to
WARNING DIAGRAM
Control Signal
1 Replace the EEPROM. - -
2 Replace the PWB-A. - -