0310: Laser Malfunction; 0500: Heating Roller Warm-Up Failure; 0502: Thermistor Open-Circuit Failure; 0503: Thermistor Resistance Failure - Konica Minolta bizhub c20 Service Manual

Field Service Ver. 1.0 Sep. 2008
18.3.14

0310: Laser malfunction

PH unit
Step
Check the cable and connector for proper
1
connection and correct as necessary.
2 Change PH unit.
3 Change PRCB.
18.3.15

0500: Heating roller warm-up failure

18.3.16

0502: Thermistor open-circuit failure

18.3.17

0503: Thermistor resistance failure

18.3.18

0510: Abnormally low heating roller temperature

18.3.19

0520: Abnormally high heating roller temperature

Fuser unit
Step
Check the fuser unit for correct installation
1
(whether it is secured in position).
Check the fuser unit, DCPU, and PRCB for
2 proper connection and correct as neces-
sary.
3 Change fuser unit.
4 Change PRCB.
5 Change DCPU.
18.3.20

0F50: OHP sensor malfunction

OHP sensor (PS7)
Step
Check the PRCB connector for proper con-
1
nection and correct as necessary.
2 PS7 sensor check
3 Change PRCB.
Relevant electrical parts
Action
Relevant electrical parts
Action
Relevant electrical parts
Action
Print control board (PRCB)
WIRING DIAGRAM
Control signal
⎯
⎯
⎯
Print control board (PRCB)
DC power supply (DCPU)
WIRING DIAGRAM
Control signal
⎯
⎯
⎯
⎯
⎯
Print control board (PRCB)
WIRING DIAGRAM
Control signal
⎯
PRCB PJ15-5 (ON)
⎯
18. Malfunction code
Location (electri-
cal component)
⎯
⎯
⎯
Location (electri-
cal component)
⎯
⎯
⎯
⎯
⎯
Location (electri-
cal component)
⎯
C to D-6
⎯
341