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Post by mastertech on Jan 27, 2014 16:49:42 GMT -5
Well I looked over the documents and that connector is 1 of a bunch of connectors that connect to the prestage or preamp board. So if you cannot get at that connector then you may have to disassemble until you can attach 2 wires to those locations and then reassemble and test. The only other place I can see on the amp board to get a good test is D5717 and D5718.
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nawaz
Junior Member
Posts: 35 
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Post by nawaz on Jan 27, 2014 20:12:46 GMT -5
I have removed 3 layers of boards (from top: Digital Main Assembly board, Audio Assembly board, Composite and S Assembly Board) to reach the Power Amp Assembly board. None of these 4 boards have CN5610 on them. Am I looking at the wrong place or there is typo in your number?
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Post by mastertech on Jan 27, 2014 20:48:03 GMT -5
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nawaz
Junior Member
Posts: 35
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Post by nawaz on Jan 28, 2014 10:53:06 GMT -5
Thanks for the diagram, found the connector. It is at a very tight space, will have to struggle to make arrangement for measurements. It may take a day or two, will post the results when available.
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Post by mastertech on Jan 28, 2014 12:41:34 GMT -5
In the attached picture I have circled 2 jumper wires. They are marked VH+ and VH-. If you can see these wires and test on them, that is what I need. They are right below those 2 caps I think I had you look for. If you cannot get your test probe in there sometimes you can just slip a solid wire under the jumper wire and it is enough contact to get a reading.  |
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nawaz
Junior Member
Posts: 35
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Post by nawaz on Jan 29, 2014 15:15:05 GMT -5
Voltage reading between VH+ and VH- is 53-54V.
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Post by mastertech on Jan 29, 2014 15:58:50 GMT -5
I need readings between VH+ and gnd, and then VH- and gnd. Gnd jumpers can be seen in the image right next to where you are testing.
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nawaz
Junior Member
Posts: 35
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Post by nawaz on Jan 29, 2014 16:52:17 GMT -5
Between ground and VH+ zero volts
Between ground and VH- 54 volts
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Post by mastertech on Jan 29, 2014 18:31:31 GMT -5
Well now we are getting somewhere. next test is with receiver "NOT" plugged in. DMM on diode scale.
Looking at the above image again to the left of the red circle you can see: P5004 and P5003.
Locate them on the board and test each one with your DMM and tell me what you get.
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nawaz
Junior Member
Posts: 35
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Post by nawaz on Jan 29, 2014 19:02:11 GMT -5
Receiver NOT plugged in, DMM on diode scale
P5003 1630 ohms
P5004 zero ohms (short/buzzer sounds)
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Post by mastertech on Jan 29, 2014 19:38:09 GMT -5
P5003 is blown. It is a fuse. It may have just blown or there may be a shorted part in that circuit.
Try doing a diode test between VH+ and gnd and VH- and gnd and give me the readings.
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nawaz
Junior Member
Posts: 35
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Post by nawaz on Jan 29, 2014 20:06:18 GMT -5
Receiver Power Cord Disconnected, DMM on Diode scale:
VH+ and Ground 1322 (keeps changing upwards)
VH- and Ground 1269 (keeps changing upwards)
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Post by mastertech on Jan 29, 2014 20:14:58 GMT -5
Doesn't seem to be a direct short which is good. Do you have to remove that board to replace that fuse(P5003)? What type fuse does it appear to be?
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Post by mastertech on Jan 29, 2014 20:17:05 GMT -5
I believe that is a yellow body pico fuse. Do you have any of these fuses?
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nawaz
Junior Member
Posts: 35
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Post by nawaz on Jan 29, 2014 20:29:48 GMT -5
I need to remove 3 boards (digital control board, audio board and video board) to reach the amplifier board. I have practice of removing these boards so it is not a big deal.
You are correct, it is a yellow body, similar to a small resistor. I do not have this or any other type of fuse, I can buy one locally if you let me know the parameters or suggest substitute.
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