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Post by mastertech on Nov 8, 2015 16:16:03 GMT -5
Correct
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guptau
Junior Member
Posts: 90 
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Post by guptau on Nov 8, 2015 16:31:16 GMT -5
Need help. The backside does not show the register # but actual names. I do not see any register but I assume the small holes will be tested? Thanks 
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Post by mastertech on Nov 8, 2015 17:02:18 GMT -5
I thought I saw some of those numbers on the other side of that board and they were accessible. How accessible is connector P6601b on that board?
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guptau
Junior Member
Posts: 90
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Post by guptau on Nov 8, 2015 17:17:21 GMT -5
p6601b seems to accessible. It is the left one on the last row.
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Post by mastertech on Nov 8, 2015 17:27:17 GMT -5
Ok, you can test there with your positive probe. DMM on DC voltage and receiver plugged in. Test pins 20,19,18,17,16,15 both when powering on and after shut down.
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guptau
Junior Member
Posts: 90
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Post by guptau on Nov 8, 2015 17:38:05 GMT -5
They all are 0V no matter what situation button pushed or not. Could it be because I disconnected the HDMI board as following? Without which I could not access p6601b.
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Post by mastertech on Nov 8, 2015 18:07:43 GMT -5
Yes it could be. That is to far disconnected.
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guptau
Junior Member
Posts: 90
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Post by guptau on Nov 8, 2015 18:15:02 GMT -5
That HDMI board connected, I can not reach the connector. The whole MPU board is covers by the board attached to the HDMI board shown above. We need some other approach.
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Post by mastertech on Nov 8, 2015 18:24:42 GMT -5
The only board left to test on is U0011.
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guptau
Junior Member
Posts: 90
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Post by guptau on Nov 9, 2015 13:07:05 GMT -5
Hi Mastertech, can you provide me with what and how to test u0011, I can start on it once I come Home from work? Thanks.
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Post by mastertech on Nov 9, 2015 19:28:29 GMT -5
Connector P6606A, pins 1 thru 7.
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guptau
Junior Member
Posts: 90
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Post by guptau on Nov 9, 2015 20:45:20 GMT -5
I managed to find the P6606A and B. They are very much hidden and does not seem to be possible to be reached by a novice like me specially when everything is connected. Any suggestion?
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Post by mastertech on Nov 9, 2015 22:15:23 GMT -5
Have you ever heard the saying "you can lead a horse to water but you can't make him drink".  |
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guptau
Junior Member
Posts: 90
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Post by guptau on Nov 9, 2015 22:21:46 GMT -5
You should be able tell that I am complete newbie in this. I am seeking your expertize and hand holding if needed.
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Post by mastertech on Nov 10, 2015 0:05:21 GMT -5
If you are not able to access a connector with all boards installed and connected then you have to install fly wires, which means nothing more then run a wire from a point and then leaving the unit so you can later test on the end of that wire with your meter. These wires can be very tiny in gauge, single strand but they should be coated.
So if you have to run fly wires then it is best to test as close to the MCU as possible. I would use connector P6601B on CPU board and wires for testing pins 15 thru 20. You can remove boards to get to the connector and just push the wires down into the connector if you can. If that wont work then you would have to solder them to the back side where the pins go thru the board. You can also tape the wires to something to help hold them from pulling out when assembling. You can run all the wires at once and tape the other ends to a piece of cardboard and mark the cardboard as to where each wire is connected to. So you know later after it is all reassembled and ready for testing, where each wire goes.
Let me know if you have any more questions.
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