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Trc-457 power supply testing

jrd426

jrd426

Well-Known Member
Sep 5, 2018
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Hi, im looking for a test point to check voltage coming from my internal power supply on a trc-457. Can anyone confirm if i test one side of r302 as im not having any luck. Im using the chassis for the neg lead from my meter. Thx in advance :)
 

It's test point 10, the emitter of TR401 at 13.80 vdc. You can also measure it at C94 on the board but use a transformer can or the metal dividers by the PLL section for ground as the chassis and the board do not share ground.
 

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