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Still having voltage problems
Still having voltage problems
ssssly
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ssssly
Sr. Member
Posts:
386
Still having voltage problems
on:
March 10, 2013, 04:58:52 AM
So started when I blew up the soft start board because the 10k potentiometer was missing (See previous post).
Got the the new board and a new zener string.
Replaced them and now I get this.
Terminal Should be / Is
1 440 / 456
4 N/C
5 71 / 78
6 0 / 78
9 175 /140
10 233 / 0
17 0 / 0
18 0 /
19 175 / 141
Four pin socket
A1 74.1 / 82.6
A2 428 / 454
A3 close to 0 / .6
A4 69.2 / 77.5
Nine pin socket
B1 3.1 VAC / 3.2
B2 4.1 / 4.1
B3 close to / 0
B4 175 / 143
B5 0 / 0
B6 300 / 145
B7 0 / 0
B8 6.3 / 1.89
B9 3.1 VAC / 3.29
The B side LED don't light. I checked continuity between the points on the soft start board in and out of the diodes and everything was good. Flowed all the joints and checked continuity again. Still showing good, still not lighting and same readings.
All the zeners conduct when tested with the diode tester on my Vmeter.
Continuity between the board and all external components are good.
B4 shows a constant resistance of 349k ohm.
Any ideas on where best to look next?
Thanks in advance
ssssly
Sr. Member
Posts:
386
Re: Still having voltage problems
Reply #1 on:
March 11, 2013, 02:36:48 AM
Got it working.
Managed to put a 249k resistor in r3 instead of the 2.49k.
Guess decimal places do matter. And it looked pretty toasted when I took it out.
B6 and 4 are right on now.
A1-4 still running high.
A1 82
A2 453
A3 1.1
A4 76.8
Look close enough to me. Any reason I should be concerned or want to drop rose down a touch?
Thanks
Grainger49
Hero Member
Posts:
7175
Re: Still having voltage problems
Reply #2 on:
March 11, 2013, 10:46:11 AM
That is why I measure before putting in a resistor. I don't trust my eyes anymore.
ssssly
Sr. Member
Posts:
386
Re: Still having voltage problems
Reply #3 on:
March 11, 2013, 01:57:07 PM
I do as well. So unfortunately I can't blame my eyes.
Just my senile brain that saw a 2, 4 and 9 and decided "yup that one goes there."
Grainger49
Hero Member
Posts:
7175
Re: Still having voltage problems
Reply #4 on:
March 11, 2013, 02:40:45 PM
Well
, then, it was your eyes that didn't catch the decimal. That, too, causes me problems.
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