Hello all,
I'm Pierre, i live in Belgium and i love to fix old electronics stuff when it's possible.
I've found, few months ago, a PM3375 Philips oscilloscope from a auction site. It was stored brand new in his box on a shelf for 25 years. The daughter of the previous owner tried to power up the oscilloscope and guess what : lot of smoke.
As i found the service manual in english on a Dutch site for 35€, i've decided to bought the oscilloscope for 30€ and the service manual too.
Restoration time.
After a rapid check up, I discovered a burned capacitor on the power supply, completely toasted. I've tested all the capacitors and many of these were leaking.
So i've :
- Replaced faulty chemical capacitors
- Checked everything twice before power up
Finally the oscilloscope has booted up without any problem.
Rapid check : Everything is ok, but calibration is out, especially on the digital side.
Yesterday, i was calibrating the oscilloscope when i've touched the plastic film protection in front of the LCD display with my finger and i think that a ESD has killed the display or the controller or both ?
As you can see on the pictures some areas of the display are very dim and a snapshot of the reset screen shows some missing LCD signs on the display.
I'm not too aware with LCD. Do you think it will be possible to fix the LCD device by replacing the 3 PFC8577T on the LCD board (I've found some on ebay for a good price) ? Or should i search a LCD device from broken Philips oscilloscopes ?
Any advice would be appreciated.
Thanks
Pierre