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Battlezone Deflection PCB
boardjunkie:
F600 is for the Y axis amplifier. Q608,609.
http://arcarc.xmission.com/PDF_Monitors/Atari%20Monitor%20TM-151%20Issue%202%20Electrohome%20G05-802%20G05-805%20Monochrome%20XY.pdf
Page 11.....bottom left.
You need to replace that pair, and check all the components in that circuit. They are basically just a rudimentary audio pwr amp, so the same rules apply. If an output device shorts, the driver and bias components may well be taken out with it.
For the outputs, I would use something beefier. I suggest the MJ15023/MJ15024 pairs. I'm not so sure the 3716/3792 is even in production anymore, so the likelyhood of buying fakes is increased.
boardjunkie:
Forgot to mention, Q608 and 609 are large metal case to-3 transistors mounted to the frame of the monitor.
http://www.zinfer.com/arcadepage/asteroids/12122002/DSCF0003.jpg
You'll have to trace wires back from the appropriate pins of the connector to identify which pair is causing the problems.
HaRuMaN:
Awesome, thanks! I have those parts already, just haven't installed them. I've been replacing known bad parts, and working my way back. (While burning up a bunch of fuses, lol).
:cheers:
boardjunkie:
You always work from def amp outputs back toward the input on vector monitors. From most likely to fail (output transistors) to least likely...
When you replace those output transistors, make sure you use mica insulating spacers (and fresh heatsink goop) between the transistor and the frame. The transistor mounting plate *cannot* contact the monitor frame....
HaRuMaN:
Thanks for the tips. I'm definitely a vector n00b, and any help is appreciated.
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