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Post by mastertech on Mar 6, 2014 22:37:37 GMT -5
Ok, let me look over all this stuff tomorrow. To tired right now. The .08 might just be ok. Your meter might just be picking up stray voltage. Is the harness still connected to CP402?
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nashou
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Post by nashou on Mar 6, 2014 22:44:03 GMT -5
Ok, let me look over all this stuff tomorrow. To tired right now. The .08 might just be ok. Your meter might just be picking up stray voltage. Is the harness still connected to CP402? Yes it was connected the entire time. That is where I was measuring the voltages from. Nashou |
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Post by mastertech on Mar 6, 2014 22:48:24 GMT -5
What happens if you disconnect it.
See you tomorrow.
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nashou
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Post by nashou on Mar 6, 2014 22:52:34 GMT -5
What happens if you disconnect it. See you tomorrow. Same. Nashou |
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Post by mastertech on Mar 7, 2014 11:00:49 GMT -5
On the other 2 channels that were damaged, what parts have you removed since then for further testing of the board?
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nashou
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Post by nashou on Mar 7, 2014 17:07:14 GMT -5
I brought the board to work with me as I had a feeling you'd ask me something.  SL channel: R545,554,555,568,561,562. D422,D421. FR Channel: R458,483,474,475. D410,D409 All amps are also out the Smaller one like Q409, Q 445 etc.... Nashou |
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Post by mastertech on Mar 7, 2014 18:13:26 GMT -5
Since at this point you have pretty low voltages on your output lines I would like you to connect all harnesses and bring it out of protection and see if it stays on. usually you need below .1v to not go into protect but lets see where you are at. If it still shuts down I want all the voltages again on the output lines and the protect lines. And be specific.
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nashou
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Post by nashou on Mar 7, 2014 18:59:37 GMT -5
Since at this point you have pretty low voltages on your output lines I would like you to connect all harnesses and bring it out of protection and see if it stays on. usually you need below .1v to not go into protect but lets see where you are at. If it still shuts down I want all the voltages again on the output lines and the protect lines. And be specific. Will do when I get home. Nashou |
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nashou
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Post by nashou on Mar 7, 2014 20:32:29 GMT -5
It still shuts down.
FL= -.113
FR= Jumps around between +.827 to .887
C= " " " +.9 to .95
SL= " " " +.82 to .86
SR = " " " + .88 to .9
Protect lines
TR= .257
RADI= .255
ASO=-.000
DC 3 = .639
DC 4 = .638
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Post by mastertech on Mar 7, 2014 20:35:02 GMT -5
disconnect the protect harness and retest at connector on amp board. I'm wondering if it is backfeeding.
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nashou
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Post by nashou on Mar 7, 2014 20:39:18 GMT -5
disconnect the protect harness and retest at connector on amp board. I'm wondering if it is backfeeding. I had the same thought last night I did test that in one of my previous posts but I don't think I got specific. Will do now.... |
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nashou
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Post by nashou on Mar 7, 2014 20:49:28 GMT -5
FL= -.066
FR= +5.87
C= +5.8
SL= +4.4
SR = +4.3
Protect lines
TR= - 2.3
RADI= - 2.183
ASO=-.000
DC 3 = -.001
DC 4 = -.000
But i tried to start it like that last night and it showed overload error on screen with protection disconnected
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Post by mastertech on Mar 7, 2014 20:59:57 GMT -5
So DC 3 and 4 at the amp connector is 0 with the harness disconnected?
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nashou
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Post by nashou on Mar 7, 2014 21:09:40 GMT -5
So DC 3 and 4 at the amp connector is 0 with the harness disconnected? oops reverse all those numbers. Sorry the connector twists and I got confused. DC 4= - 2.3 DC3= - 2.183 ASO=-.000 RADI = -.001 TR = -.000 I'm wondering if the DC_PRO circuit is feeding the voltage? |
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Post by mastertech on Mar 7, 2014 21:31:04 GMT -5
Alright. I've been looking over the protection circuit and I believe you need to go check some stuff there. It is on the CPU board. Just follow the harness.
Parts to test:
Q216,Q211,Q209,Q217,Q212,Q210,Q213,Q214 and Q215.
Lets start there just looking for shorted legs and see what you get. You don't have to give me specific test results, just if you find any with close to short legs.
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