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Post by u2nmg93 on Feb 27, 2018 21:25:26 GMT -5
Yes, still stayed in the right channel.
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Post by u2nmg93 on Feb 26, 2018 23:47:10 GMT -5
Just the electrolytic caps. I messed up adjusting the idle current alignment, I kept trying to get 0mv just like the offset instead of between 2.5 to 5. The left channel is at 3mv but the right I can't get above 1mv. I changed the pot out just to make sure and even with a new one still can't get above 1mv. Any ideas?
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Post by u2nmg93 on Feb 26, 2018 16:47:34 GMT -5
I got thorough all of them in the channel that were in the picture and readjusted the two pots and still have static in the channel. Is there something else that could be causing it? All the ESRs were less than 1 ohm and no more than .2% voltage loss on any of the ones I didn't replace. I replaced all the electrolytic caps in both channels.
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Post by u2nmg93 on Feb 17, 2018 21:11:30 GMT -5
I checked all the caps, they had between 1-2 percent voltage loss and an esr of 3ohm or less. I went ahead and replaced all the electrolytic caps that I tested. Still working through the rest of them as I still have static on the channel.
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Post by u2nmg93 on Feb 12, 2018 23:27:49 GMT -5
I do have a cheap ESR meter, I'll dig in and see what I can find.
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Post by u2nmg93 on Feb 9, 2018 23:32:34 GMT -5
Removed the relay, 4 resistors, and capacitor and still have static on the right channel.
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Post by u2nmg93 on Feb 7, 2018 22:20:40 GMT -5
Static stayed on the right channel after installing the jumpers.
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Post by u2nmg93 on Feb 7, 2018 16:22:10 GMT -5
Yes, they were out a little on both channels but are as close to spec as I can get them now.
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Post by u2nmg93 on Feb 7, 2018 14:19:53 GMT -5
I have right around 1mV DC on each channel.
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Post by u2nmg93 on Feb 6, 2018 21:50:37 GMT -5
I have a Proton amp that has quite a bit of static on the right channel. The left is clear and both have audio, the right is just lower and has a lot of static. I've tried cleaning the inputs and outputs, the lights are all burnt out and I removed them just in case, no change in sound. Removed and cleaned the main relay and tested all the main transistors that check out. Gauges work and it should look pretty cool when lit up. The matching, preamp Proton 1100 also has the right channel messed up with no audio out. Haven't gotten into it yet. I have a copy of the service manual for the amp, PM me if you need a copy. Need to know what to check/where to go next, couple of spots have gotten warm but nothing obviously burnt. Relay got pretty warm on the right channel but connecting a speaker at the point before it goes into the relay still has the static. Any help is greatly appreciated!
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Post by u2nmg93 on Nov 8, 2017 11:48:35 GMT -5
R8101 reads 0 ohm, Q8704 reads 0v on leg to R8704 and 3.2v on the other 2 legs. Q8705 reads 3.2v on the leg connected to Q8704 and 0v on the other 2 legs. Q8704/5 are both located on the bottom side of the board so I had to solder a small piece of copper wire to each leg to test it. If any of the readings don't make since I'll test them again.
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Post by u2nmg93 on Nov 2, 2017 11:47:30 GMT -5
Ran through with the TV connected and on to each receiver and disconnected. One is the TX-NR555 that has no sound which I called "GOOD" and the other is the 545 that has sound but no video labeled "NOVID" I'll try and test Q8704 and Q8705 later today or tomorrow. Attachments:HDMI Pinout.xlsx (9.76 KB)
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Post by u2nmg93 on Oct 27, 2017 14:41:03 GMT -5
It reads 0 ohm.
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Post by u2nmg93 on Oct 27, 2017 12:27:20 GMT -5
With the cables open on the other end the input reads .055v connected or disconnected and the output reads 0v whether cable is in or not.
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Post by u2nmg93 on Oct 27, 2017 10:32:07 GMT -5
On the input it reads 4.5v with a cable connected and .055v when pulled out. The output reads .055v when the cable is connected and .001v when pulled out.
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