When switch on machine, the code SC491 appears on screen. After reset, same thing happens. what is the problem?
SOURCE: sc491 error on ricoh MPC 3500
Sc 491 straight from manual
High voltage power: Drum/ development bias output error
An error signal is detected for 0.2 seconds when charging the drum or
development.
High voltage leak
Broken harness
Defective drum unit or development unit
Defective high voltage supply unit
1. Check or replace the harness.
2. Replace the drum unit or paper transfer unit.
3. Replace the high voltage supply unit.
SOURCE: code error
Push Buttons in this order:
Yellow/clear key
1
0
7
and Hold Red/Stop key, for 5 secconds.
If this works, turn machine off/on, the code should be reset. Alltho the code may come back, when the Copier attempts to print a page. If this is the case, you need your Fusing unit Repaired.
SOURCE: Ricoh CL2000N Error Code SC230
The manual says this code means " BCU Received no Feedback from LD" I have no idea what that means, but maybe it will help a tech on hear tell you more.
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