Sharp MX4070 giving error code c4-40

[danny464]

Hello, I encountered an error on a sharp mx4070 printer C4-40. I looked it up and saw that it was a TC PWB voltage problem. Is there any way around to solve this issue or will I have to replace the whole board.
Thank You

[Phil B.]

Re: Sharp MX4070 giving error code c4-40

Hello, I encountered an error on a sharp mx4070 printer C4-40. I looked it up and saw that it was a TC PWB voltage problem. Is there any way around to solve this issue or will I have to replace the whole board.
Thank You

whole board

[copiertec]

Re: Sharp MX4070 giving error code c4-40

Have you tried changing the PTC Unit, first? Have you tried swapping out charge units on the drums? Have you checked all the connections going to the TC PWB? Check the 24v fuse on the TC PWB. If all else fails you need to change out the MC PWB.

[EasyRider]

Re: Sharp MX4070 giving error code c4-40

Had the same error this week on one of those.
I had 24v at both the MC and TC PWB conn's.
Replaced TC PWB and all is good.
Never did find that pesky 24v fuse. Must be a little bugger.

[Phil B.]

Re: Sharp MX4070 giving error code c4-40

Had the same error this week on one of those.
I had 24v at both the MC and TC PWB conn's.
Replaced TC PWB and all is good.
Never did find that pesky 24v fuse. Must be a little bugger.

Probably a surface mount fuse. You shouldn't try to replace it. Just swap the board in question.

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