nashou
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Post by nashou on Mar 8, 2014 19:04:01 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. Yeah I don't see a cable? What the hell did I loose it or was it never there. Where does it connect to from the amp board? I don't see that cable any where if it can be disconnected from either side or not? Let me look in my shop. I have ht unit in the kitchen and fix the board in the shop. I wonder if I removed it and forgot about it!! Doh!!! But I don't see it any where in the chassis or where it would connect to. BRB |
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nashou
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Post by nashou on Mar 8, 2014 19:08:39 GMT -5
OMG !! I found it buried way way under the HDMI board. I don't know how it got there. I don't think I took that board off ever.
Nashou
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nashou
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Post by nashou on Mar 8, 2014 19:14:42 GMT -5
I feel like a freaking idiot!!!!!!!
it stays on now. WTF !!
Ok so I have to know why would not having that connector on blow the channels and show DC. the DC on all channels now is .024 or so the FL is still a bit higher BUT
the Receiver stays on now.
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Post by mastertech on Mar 8, 2014 19:22:16 GMT -5
The preamp signal is still required to cause the outputs to switch and balance the line. If they are not switching then you would read B- on the outputs, which is what you had. Looks like you just need to test all the parts you removed and reassemble. The only bad part you found after it worked and then stopped again was Q417, which may have been caused by incorrect value of R493. Let me know how you make out and hopefully those other 2 channels were not damaged beyond what you found as of now. You may want to use the test parts list I gave you in the beginning of this project to check the same parts in these other 2 bad channels.
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nashou
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Post by nashou on Mar 8, 2014 19:26:10 GMT -5
I guess we still have to figure out Fl now.
It show -.131 while the others show .024
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nashou
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Post by nashou on Mar 8, 2014 19:27:42 GMT -5
Also I lost one Diode a 1SS133T what is comparable that I can get at radio shack while its still open.
I need to get some more 100ohm 1 watters too
Nashou
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nashou
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Post by nashou on Mar 8, 2014 19:30:54 GMT -5
Mac have to leave for a bit but i will be on the road. email a comparable part for the diode at radio shack and hopefully they have it, Or i have to wait to order parts.
nashou
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nashou
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Tech in Training.....
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Post by nashou on Mar 8, 2014 19:35:23 GMT -5
Printing out a data sheet to take with me.
nashou
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Post by mastertech on Mar 8, 2014 19:49:10 GMT -5
I guess we still have to figure out Fl now. It show -.131 while the others show .024 I would not worry about this until you have installed most of the parts that were removed. |
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Post by mastertech on Mar 8, 2014 19:50:19 GMT -5
Mac have to leave for a bit but i will be on the road. email a comparable part for the diode at radio shack and hopefully they have it, Or i have to wait to order parts. nashou Or steal one from that 1021 board for now. |
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nashou
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Post by nashou on Mar 8, 2014 20:54:08 GMT -5
Ok I got the 1N4148 and picked up some more 100 ohm 1 watt resistors. So I'll first install all the resistors and diodes before putting in the amps and test.
Sound like a plan?
Nashou
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Post by mastertech on Mar 8, 2014 21:03:01 GMT -5
yep.
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nashou
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Post by nashou on Mar 8, 2014 22:08:11 GMT -5
ok All diode's and resistors in. Going to test.
Should I also try to power on on just test with out powering on?
Nashou
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Post by mastertech on Mar 8, 2014 22:10:30 GMT -5
Either or both. If you test first you will know what it will do, lol.
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nashou
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Post by nashou on Mar 8, 2014 22:11:40 GMT -5
Either or both. If you test first you will know what it will do, lol. All DC are now positive and under .025 !!! Now to power up Nashou |
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