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Post by mastertech on Nov 23, 2014 22:07:21 GMT -5
So you current have removed Q1012,Q1013,Q1014,Q1015,C1094 and have connector CN1001 disconnected?
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Post by tritron on Nov 23, 2014 22:16:45 GMT -5
Yes all the parts removed. All I have plugged in is the audio in board and mainboard and I have all other cables unpluged from main board except for cable that goes into audio in board and power supply. The wires comming out of large transformer are unplugged also.
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Post by mastertech on Nov 23, 2014 22:23:33 GMT -5
The cable that goes from the input board to this board connects at CP1008, correct? Disconnect that and see if the 12v comes up.
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Post by tritron on Nov 23, 2014 22:33:02 GMT -5
I get 12v when I unplug audio in board from main board
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Post by mastertech on Nov 23, 2014 23:04:14 GMT -5
Something is surely a little odd here. Pulling those transistors should of removed the 12v line from the circuit. Guess you will have to remove some more stuff until there is nothing connected to that line.
So start by pulling the relays and diodes for the relays and see what you then get on the 12v line.
Relays are: RLY1001, RLY1002, RLY1003 and RLY1004.
Diodes are: D1003,D1004,D1005 and D1006.
Did you buy this receiver not working?
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Post by tritron on Nov 23, 2014 23:15:10 GMT -5
Yes it was not working when I bought it
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Post by mastertech on Nov 23, 2014 23:29:51 GMT -5
Does it look like a new (unused) receiver?
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Post by tritron on Nov 24, 2014 0:32:32 GMT -5
It was used i got it of ebay as no power so i figure out it could be a fuse
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Post by tritron on Nov 24, 2014 8:30:31 GMT -5
So you have schematic for main board you can post please.
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Post by mastertech on Nov 24, 2014 10:48:30 GMT -5
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Post by tritron on Nov 24, 2014 13:37:05 GMT -5
I took out all the relays and transistors diodes and still no 12v
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Post by mastertech on Nov 24, 2014 15:58:58 GMT -5
This is why I asked if this looked like a unused receiver. It sounds like a factory defect in that board somewhere. You are going to have to look over the 12v line traces and see if there is a defect. Check the connectors also for a solder bridge or something. Here is a picture of the board so you can see the traces. If you need me to highlight anything for you let me know.   |
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Post by tritron on Nov 24, 2014 16:07:33 GMT -5
Where is good place to buy surface mount diodes and transistors ?
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Post by mastertech on Nov 24, 2014 17:04:25 GMT -5
Please do not buy any more parts until we are further along.
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Post by tritron on Nov 24, 2014 17:42:00 GMT -5
I get short at ic1004 both first two legs show short
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