Sc302 /ft 7660

[red flower]

I've ricoh FT7660 it display code sc302 i replace the drum ,charge corona ,AC drive but the error is still found

[iMind]

	Quote:			Originally Posted by red flower
	I've ricoh FT7660 it display code sc302 i replace the drum ,charge corona ,AC drive but the error is still found

where did you find that machine, in a museum, try entering service mode 5.810 not certain or enter service mode and exit

[ISISTEPHANE]

try also changing main board, this is a D level sc code only switch off and switch on to erase this code, after finding the solution!! try ton print without charge ass y even white copy to see if you have the code and verify if you have the grounding plate on the charge ass y

[DocF]

Stolen direct from the FSM:

SC302 - Charge corona leakage
Definition: [level: D]
The charge power pack detects a charge corona leakage (output: 0 V) for
4.8 ms, or detects the output to be more than 7 kV, 10 times in one job.
Possible causes:
· Main charge corona unit defective
· Main charge power pack defective
· High voltage control board defective

That being said, I sometimes would have issues getting the charge wires changed and create this SC myself. Also, the best test for arcing coronas is the nose. I've had this come from a bad receptacle on the frame also. However, with freshly cleaned charge unit and new wires and grid, I would be inclined toward the High voltage control board as I had several of those fail.

Even though this old analog is nearing the end of its life, they were very good war horses and many of the issues in the earlier generations of this machine had been addressed by this version.

Doc

[lkrsardis]

You can still get parts for that POS? I was the first man trained in Memphis on that machine, still have bad dreams.

[laktech]

you can change hight voltage and check point contact on the drum unit.Normally it break fets or ic 494 on charge board on the drum