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Post by jeremy on Jun 30, 2014 22:04:15 GMT -5
If there's anything you want me to do im up for it. Sure. Swap the Eeproms between boards and see what happens, LOL. Okay okay, I meant within reason , My luck ill overheat the good one and have 2 bad ones . I am willing to order the eeprom though. I'll need the part # or a mouser/digikey/etc.. link though
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Post by jeremy on Jun 30, 2014 22:08:34 GMT -5
okay just got done redoing all the pins on IC401, have to say im impressed with myself, but I have to give some credit to the very sharp tip I am using as well. Still the same results, stuck in standby.
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Post by mastertech on Jun 30, 2014 22:36:50 GMT -5
Ok, here's the thing. A blank Eeprom is part number 24LC16b and is only about 34 cents. The Denon eeprom part number is 9630313605 and is around 10 bucks. So, the question is, is the Denon one also blank or does it have programming on it? If it requires programming then the blank one will not work, unless you had a programmer. Then you could buy some blanks, read the good one and write to a new one.
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Post by jeremy on Jun 30, 2014 23:49:36 GMT -5
Well, I suppose we're pretty much down to either that eeprom, or the CPU if its not the eeprom. The thing is, my luck the eeprom will probably be blank and need programming. I don't think the receiver is worth that much effort, especially in the condition its in. I would probably go for it if I knew for certain the chip would have the programming. I'm not really bummed, I'm actually happy, as we seemed to have managed to at least find the cause(s). I think I'm ready to work on another unit anyway, this one has gotten more time than most would have spent on it.
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Post by mastertech on Jul 1, 2014 10:48:20 GMT -5
Yeah, I don't blame you. Before you put it to rest though maybe just do a diode test on Q404,Q405,Q414,Q410,D407,D408,ZD410 and D405.
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Post by jeremy on Jul 1, 2014 11:10:21 GMT -5
Just checked all those and all the diodes read as they should, same with the little transistors on the bottom. Not a surprise with a Denon. They are either severely blown up with a lot of bad parts, or just the CPU or some other IC takes a crap >_<. Thanks for the help MT. At least I can move onto something else now.
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Post by mastertech on Jul 1, 2014 11:19:44 GMT -5
Welcome.
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