Build Your Own Arcade Controls Forum
Main => Monitor/Video Forum => Topic started by: kardenm on December 22, 2016, 04:29:53 pm
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Need help with a 25"(?) CRT from a Silver Strike bowling game. Sticker on the chassis says WGM2792.
The game powers up and I can hear the game playing, the monitor is getting 120v and the fuse is good but that's as far as it goes. No picture, no HV.
There is a small relay (H1AA012T) on the board in the power supply section. This relay is ticking (turning on and off) about once a second.
Any suggestions on where to start would be greatly appreciated.
I will attempt to attach pics of the board, relay and cabinet.
Thanks!
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these can be very difficult to repair
first thing to check is the HOT and the fet's,caps will need checking also-look for any burnt components like resistors
if the HOT is short you should remove and inspect the deflection yoke for corrosion,they used a paint around the neck that over time flakes off onto the inner part of the deflection yoke and rots through the insulation of the copper wire thus causing a short-if this is not put right then no matter how many times you repair the chassis on power up it will fault again
flyback is another component that is a common fault
absolutely tons to check on these and sometimes you are lucky and they can be an easy fix,other times not so
wells gardners website has a fault guide to these and there are fault guides on other forums,these will be of great help to you
of course quickest way to sort this is buy a replacement chassis,seen some on ebay but if your yoke is short they will fault quite quickly
its a 27" crt btw,the wgm2792 code means first 2 digits are size and second two digits are model number
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Thanks grantspain. Appreciate willingness to help and extensive knowledge.
Doesn't sound very hopeful and may be beyond my capabilities and/or patience.
I'll try the WG website. any specific links? Also may try ebay to buy another chassis.
I would assume there is a way to test the yoke somehow before I buy a replacement.?
I'll see what I can figure out and post back.
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trouble with testing the yoke is that it will almost certainly read ok until it has been powered-then the short will occur
only way to be sure is to remove an inspect