MPC 3500 DEAD! only main powe led on

[ATSBMCO]

Hello,

Checking over the PCB again I was measuring 5v present at the pins of the large connectors of CN912, CN910, CN914, CN913, but still no 24v. However, I also noticed that resistor R55 (Next to Q10) was open circuit too. After replacing this resistor the circuit was only showing 5v line on connector CN909 only.

As I thought, the circuit carries the 5v to the keyboard ready for the power to be depressed, it shows that the PCB is required to be installed back into the copier for the entire circuit to activate, once installed it worked.

I can only tell you what I have seen and repaired.
Good luck.

[copier tech]

Good fix, but most engineers down have time for that!
Order a new PSB, fit it & on to the next moaning customer!!!!

[jhon]

Good fix, but most engineers down have time for that!
Order a new PSB, fit it & on to the next moaning customer!!!!

what is the power supply section in this image how can i power and test the board.... hoping for your help....