Re: I built a TM500 mainframe tester, and updated the design. Someone might find this useful?


Jared Cabot
 

I just checked my TM501 (Not TM501A) modules, all four of them in my collection have Q12 on the left, Q10 on the right.

I also just plugged my tester module in to each and the +15 and -15 LED's lit ok when the rotary switch is set to Position 3 (+15V should be out when in Position 1, -15V should be out when in Position 4)

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