Friday, June 3, 2016

Laserdisc repair...sort of part 2, or follow up on part 1

In our previous episode we noted that sound of exploding capacitors and the smell of magic smoke escaping occurred while playing Star Wars on laserdisc.

The follow up is as follows...

...I replaced ALL the caps on the power supply board...

...huge PITA to unhook the board...they use a connector similar to the ones that clamp onto flat-flex, but they are clamping on solid wire ribbon...well unhooking is easy...hooking is PITA.

...more PITA, the power cable comes through a strain relief plug...then is soldered onto the power I had to cut off the wires...and when it is up and running I will have to resolder them on AFTER installing the power board...ridiculous.

Anyhoo...all caps were replaced, I noticed quite a bit of heating near the one big regulator on the AC side (I think).

Hooked it back up to AC (using test leads) still smells like it is burning up, and machine didn't power up.

Now I will have to pull it out again and start checking regulators...I don't know if I have a schematic with test voltages on it...

I am not working very quickly on this...because I already got a replacement player...but I want this broken one as a backup in case the main one dies.

to be continued

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