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Post by tokejo on Mar 7, 2014 21:55:26 GMT -5
This thread is definitely not encouraging me to finish troubleshooting.
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Post by mastertech on Mar 7, 2014 21:57:36 GMT -5
Maybe you should just put this one aside for another day. you don't want it to discourage you. I put many aside for a later day.
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Post by tokejo on Mar 8, 2014 2:54:03 GMT -5
I'm reading the thread in awe of your patience, both of you Nash and Mac. I'm hoping to have some time this weekend to take my next steps, but I just hope there isn't this many of them.
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Post by mastertech on Mar 8, 2014 9:56:15 GMT -5
Well I've been down this tough road many times. So I have gained piles of patience, lol. Nash's situation is nothing new or out of the ordinary. Sometimes you just have to hunt for that 1 teeny, tiny part that is causing all the problems. I have 2 devices off to the side right now that the cause has been eluding me. Every once in a while I take a day and continue the hunt and if not found by the end of the day it goes back to the side. The key here is to not have much money invested in your problem unit so it does not hurt you inn the pocket, only your pride, lol.
What would you like to do Nash, continue or hold. Before you decide I just wanted to say that I have a VSX70 here that I was going to take some measurements from to see what exactly everything should read, even though I know what they should, just to see if they leave some range in the readings.
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Post by mastertech on Mar 8, 2014 9:59:38 GMT -5
This thread is definitely not encouraging me to finish troubleshooting. I just realsized this was you. Last night I though it was Nash, lol. Must of been tired. They are not all like this. This one has a very odd protect circuit and placed on a different board. There was no need for it. Must of just been the chief engineers son trying to show off and dad said ok, lol. |
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nashou
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Post by nashou on Mar 8, 2014 11:22:46 GMT -5
Oh No, I love the challenge. I'll keep at it. The thing is it worked for 10-15 minutes before I tried to use the Optical in then it shut off. But one set back after another is annoying for sure but it is making me more adamant about fixing it and saying Screw you pioneer engineers!!!!!  Nashou |
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Post by mastertech on Mar 8, 2014 12:11:02 GMT -5
Well a big advantage to this situation is the huge upswing in troubleshooting experience. You have probably learned more from this adventure then a pile of others. Hopefully you have been following along on your schematic and can formulate how I chose to make decisions on where to be looking and what you should be looking for, which I know you have.
I will get some readings here in a little while.
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nashou
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Post by nashou on Mar 8, 2014 13:10:40 GMT -5
Well a big advantage to this situation is the huge upswing in troubleshooting experience. You have probably learned more from this adventure then a pile of others. Hopefully you have been following along on your schematic and can formulate how I chose to make decisions on where to be looking and what you should be looking for, which I know you have. I will get some readings here in a little while. I have some what from this but more from the Marquee CLM's you helped me with but those were much easier as I know the schematics inside out on the Projectors and the theory of operation. That is one thing I wished these service manuals had. There were many times you were telling me to remove parts and i was thinking I wish he would explain to me why i had to remove that part. My problem is rushing to test again for turn on and stay on. I now know fist all DC has to be gone before we try to re set the protection circuit. |
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nashou
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Post by nashou on Mar 8, 2014 16:01:23 GMT -5
Mac I'll be headed home soon from work. I have not removed those SMD transistor from the back side of the board that are part of the protect circuit. Should I begin on those?
And I still have to test the SMD transitors on the CPU board where the other part of the detect circuit is.
nashou
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Post by mastertech on Mar 8, 2014 16:12:47 GMT -5
I'm working on those numbers now.Let me know when your ready later.
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nashou
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Post by nashou on Mar 8, 2014 17:43:15 GMT -5
I'm working on those numbers now.Let me know when your ready later. Ok ready and I measured and marked down some numbers. I named the single pin Center with it on the bottom and the other two pins on top are Left and right. So if its a Y bottom of Y is Center and the tops are left and right. So I found one that had an OL but I do not know what part it is because there is no marking on the board and I did not see it on the schematic or board layout drawing. EDIT: I think its Q215 from the ASO line. Also it read OL from +C to R and from +R to C it read .671 v And from C to L and L to C it read .171 v. I marked it here  So Q216 with POS on first pin listed C to L .187 C to R .661 L to R .668 R to L 1.809 NEG on Center C to L .187 C to R 1.825 Q 211 With POS om First pin listed C to L .757 C to R 1.824 L to R .680 R to L .664 Neg on Center C to L 1.155 C to R .651Q 217 POS on First Pin Listed C to L .187 C to R .653 L to R .665R to L 1.808 Neg on Center C to L .187 C to R 1.809 Q 209 POS on first pin
C to L .186 C to R .678
L to R .665
R to L .674
Neg on Center
C to L .187
C to R .665
thats all for now let me know what you think?
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nashou
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Post by nashou on Mar 8, 2014 18:37:23 GMT -5
Made some edits above
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Post by mastertech on Mar 8, 2014 18:39:33 GMT -5
I have been reading back through this thread and something came to me. Have you been doing all this testing with the preamp harness disconnected from CP401?
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nashou
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Post by nashou on Mar 8, 2014 18:51:20 GMT -5
I have been reading back through this thread and something came to me. Have you been doing all this testing with the preamp harness disconnected from CP401? Mine doesn't have a Preamp harness from CP401 to anywhere. This model only has Pre amp outs for A sub Woofer and Surround back/Front High Left and right. Nashou |
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Post by mastertech on Mar 8, 2014 18:54:01 GMT -5
I am taking about the channel inputs to the amp board that connects at CP401. That is the preamp inputs to the amp.
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