Hi:
I have 2 OKI ES7411 printers.
- First one doesn't do anything. No sound, no standby light....nothing
- Second one the power supply seems to switch on (I am able to hear the relé). In the front panel a green light is shown, but nothing in the LCD is shown. So from testing purposes it's also dead.
I started to dissemble the first one. And here are the pictures from the SMPS.
The first thing I've noticed when I swith the SMPS on is that the RELÉ is not activated, so the main input does not get to the bridge rectifier. From your experience, what activates the RELE? the SMPS itself or something external from the PCB?
In the meantime, I will be checking individual components and also I will compare with the second SMPS.
Regards,
Francesc.
I have 2 OKI ES7411 printers.
- First one doesn't do anything. No sound, no standby light....nothing
- Second one the power supply seems to switch on (I am able to hear the relé). In the front panel a green light is shown, but nothing in the LCD is shown. So from testing purposes it's also dead.
I started to dissemble the first one. And here are the pictures from the SMPS.
The first thing I've noticed when I swith the SMPS on is that the RELÉ is not activated, so the main input does not get to the bridge rectifier. From your experience, what activates the RELE? the SMPS itself or something external from the PCB?
In the meantime, I will be checking individual components and also I will compare with the second SMPS.
Regards,
Francesc.
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