Arcade Collecting > Restorations & repair
Star Wars - fully working!
Spyridon:
Okay, I checked the fuses and they are all good.
Next I want to check the transistors, but I'm unsure of how to test these. Can someone explain (in detail) the process for testing them.
(thanks in advance)
Level42:
Set your DVM in diode test mode. Now check between all the legs in all kind of combinations (so reverse test leads on same pins). Your DVM may beeb but should give a reading like 0.5 or something like that, or should be "infinite). As soon as you have a beep and a value of 0, you got a short.
This is my quick and dirty way, of course there's a much more scientific B-C-E testing way, but usually may way is quicker.
You can remove the transistors from the seats by gently pulling them so you can test them out of circuit, but pulling the connectors loose on the deflection board is quicker.
I knew I had made some pics of the track problems I had on the 6100 I worked on and I found them:
This clearly shows the crack. Also note the TERRIBLE soldering ! It's a "bulb" instead of a "fuji"......
Here's how it looked after desoldering:
Level42:
O and here's another classic:
A component lead that never got touched by any solder in 25 years. This was on the neck-board.....
Check out how all the other solderings were done......see and weep....
Spyridon:
I tested the two transistors on the side of the monitor cage. They both tested fine. I'm not sure I can get to the bottom ones without removing the monitor.
Level42:
Of course you can test them on the connectors on the deflection board too.
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