Screen black

[javaman7471]

I am working on a Ricoh MPC 2000 (actually Lanier LD420C) same thing I have green power light on red alert light red light on printer button but my display on op-panel is dark no light at all, I have tried a new operation panel with no luck, any hints on what to try next I was told to try polygon mirror motor because it may be indicating an SC 220 code which could cause a dark screen but I cant get into Web Monitor to verify any SC codes although it does beep like it has an SC code when turned on. Any help is appreciated. Thx all.

[ruben]

Have you tried shining a torch onto the screen? The SC code may still be visible; the screen won't have the backlight on.

[johnyb]

Have a look at SC 202 in the FSM, ant the related RTB.

[Imprestik]

Your power supply is cactus, replace the power supply....

[skynetto]

Black screen on MPC2000 occurs even when Fuse NR4 is blown on the PSU.

[Zeldaman]

Hi there!
For 99% the polygon-motor´s gone & probably the BICU-PWB, had this last week!
Greetings...:cool:

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[turbojetboy]

Hi there!
For 99% the polygon-motor´s gone & probably the BICU-PWB, had this last week!
Greetings...:cool:

Correct, you must repl polygon motor assy and BICU AT THE SAME TIME BEFORE SWITCHING BACK ON, or else you will blow the BICU again. This is now a common sight accross the range from 2500 through to 5000.