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Post by mastertech on Nov 7, 2015 21:19:10 GMT -5
Well at least it is alive, somewhat. You are going to have to go to the front display board and see what is going on there. You can go to connector P7501b on that board and set your DMM to ohm scale and have receiver unplugged. Test between pins 9 and 14 and press the power button and see if your ohm reading goes to dead short.
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Post by mastertech on Nov 7, 2015 21:20:12 GMT -5
Look for a cracked board also. I have seen that many times over.
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guptau
Junior Member
Posts: 90 
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Post by guptau on Nov 7, 2015 21:26:29 GMT -5
I will have to take the front off to access the board?
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Post by mastertech on Nov 7, 2015 21:37:44 GMT -5
Probably.
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guptau
Junior Member
Posts: 90
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Post by guptau on Nov 7, 2015 22:06:20 GMT -5
Board seems ok. Initially it show some ohms; when button is pushed ohm goes to around zero (Not complete). Once leave the button, it goes to 0L for a second or two then back to some ohms. Around 10K ohms.
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Post by mastertech on Nov 7, 2015 22:27:04 GMT -5
I would do a continuity test between boards on that harness. Specifically pins 9 (front) to 17 (CPU) and 14 (front) to 10 (CPU)
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guptau
Junior Member
Posts: 90
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Post by guptau on Nov 7, 2015 22:31:13 GMT -5
No continuity in both cases.
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Post by mastertech on Nov 7, 2015 22:41:36 GMT -5
Did you buy this receiver not working?
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guptau
Junior Member
Posts: 90
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Post by guptau on Nov 7, 2015 22:45:29 GMT -5
I purchased this receiver brand new in July 2012. It has been working fine until about 2 months ago when it stopped powering at all. It happened completely all of a sudden.
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Post by mastertech on Nov 7, 2015 22:50:52 GMT -5
Can you post an image of the harness?
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guptau
Junior Member
Posts: 90
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Post by guptau on Nov 7, 2015 23:06:29 GMT -5
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Post by mastertech on Nov 7, 2015 23:10:08 GMT -5
Have you tried doing a continuity test on any of the other lines. Just start at the top of each connector pins and work your way down verifying each line. Check them all.
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guptau
Junior Member
Posts: 90
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Post by guptau on Nov 7, 2015 23:15:49 GMT -5
Are you suspecting broken line in the ribbon cable? If so, I should test continuity from one end to other end for each pin.
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guptau
Junior Member
Posts: 90
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Post by guptau on Nov 7, 2015 23:27:57 GMT -5
All lines have continuity.
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Post by mastertech on Nov 7, 2015 23:45:14 GMT -5
I would do a continuity test between boards on that harness. Specifically pins 9 (front) to 17 (CPU) and 14 (front) to 10 (CPU) If all lines have continuity then why did we not have it here? |
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