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Post by mastertech on Mar 26, 2017 19:40:00 GMT -5
The anode side would read 0vdc no matter if it was good or bad.
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nashou
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Post by nashou on Mar 26, 2017 19:59:57 GMT -5
Pulled the cap and it reads fine. I don't have a 35uf 50v but I do have 47uf 40 v not sure if I just leave it or use that.
I'll keep looking if not.
Diode also reads fine in tester.
Nashou
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Post by mastertech on Mar 26, 2017 20:03:09 GMT -5
Use that cap for now. Remove R917 and R991 and retest voltage at cathode of D908. You are using hot gnd I assume?
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nashou
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Post by nashou on Mar 26, 2017 20:21:56 GMT -5
Use that cap for now. Remove R917 and R991 and retest voltage at cathode of D908. You are using hot gnd I assume? Using the 47uf cap and those parts removed I got 3 volts on cathode using hot gnd. :-( 400, 12 and 24 there using appropriate gods for each. ugh what next? |
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Post by mastertech on Mar 26, 2017 20:25:52 GMT -5
Remove R921 and retest on D908.
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nashou
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Post by nashou on Mar 26, 2017 20:33:25 GMT -5
Still the same , up a little 3.1xx
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Post by mastertech on Mar 26, 2017 20:40:03 GMT -5
Unplug and set your DMM to continuity. Put 1 probe on neg of C907 and test for continuity to neg side of C969 and then pin 5 of the transformer with the other probe.
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nashou
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Post by nashou on Mar 26, 2017 20:45:36 GMT -5
Unplug and set your DMM to continuity. Put 1 probe on neg of C907 and test for continuity to neg side of C969 and then pin 5 of the transformer with the other probe. Continuity is there for all points |
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Post by mastertech on Mar 26, 2017 20:55:21 GMT -5
Plug supply back in and set DMM to AC voltage and test across transformer pins 4 and 5. Then across transformer pins 8 and 9.
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nashou
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Post by nashou on Mar 26, 2017 21:05:47 GMT -5
Plug supply back in and set DMM to AC voltage and test across transformer pins 4 and 5. Then across transformer pins 8 and 9. No voltage across either pins . Nashou |
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Post by mastertech on Mar 26, 2017 21:13:51 GMT -5
Power supply is turned on and running? No Ac voltage across xformer pins 8 and 9? Maybe 7 and 10?
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nashou
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Post by nashou on Mar 26, 2017 21:24:44 GMT -5
Yes DC PS and main AC both plugged in.
7 and 10 are tied to the same planes on the board so it is also the same voltage there , that is 0.
I did check the 400 vdc was there on C907 and the 24 volts and 12 was there too.
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Post by mastertech on Mar 26, 2017 21:29:25 GMT -5
On your board is xformer pin 9 connected to D927, pins 1 and 3. And is xformer pin 8 connected to cold gnd.?
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nashou
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Post by nashou on Mar 26, 2017 21:38:27 GMT -5
On your board is xformer pin 9 connected to D927, pins 1 and 3. And is xformer pin 8 connected to cold gnd.? yes. |
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Post by mastertech on Mar 26, 2017 21:42:28 GMT -5
If you switch your meter to DC voltage and neg lead on xformer pin 8 and pos probe on D927, pin 2 what do you get?
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