Sharp MX-M850 Not Switching On

[Khumz]

I have a Sharp MX-M850 that do not switch on. Actually this machine has not been working for a while, i mean years. So i want to bring back to life.This machine does not power on at all, not eve a light on the display. So I decided it is better to come up with a complete set of tested and properly working circuit boards. To my surprise same problem remains, machine do not switch on at all. Any ideas on how to resolve this problem.

[chubblies]

Re: Sharp MX-M850 Not Switching On

Are you using both power cords? And is the main switch inside front cover on? You need to meter up the various sections to see where power is getting too, but if you don't know what you are doing, walk away as you could get a shock if you touch the wrong thing

[mojorolla]

Re: Sharp MX-M850 Not Switching On

Get out your voltmeter and start with AC power in, then DC power out of the power supply unit.
No simple fix for this scenario.
Hercules 1, she's a bit of an older girl......

[Khumz]

Re: Sharp MX-M850 Not Switching On

Get out your voltmeter and start with AC power in, then DC power out of the power supply unit.
No simple fix for this scenario.
Hercules 1, she's a bit of an older girl......

I repaired main power supply board, all DC power now available. I cant get AC across CN6 on AC PWD. I think i missing something somewhere. When i switch it on nothing happens, not even a clicking sound from a relay. I m trying to figure out switching sequence.