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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Sat Dec 20, 2014 7:52 pm Post subject: |
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| jgrice53 wrote: | | in the post where you listed all the pins as well as the picture of the ic there is a yellow line drawn to pin 12. i mistakenly thought that you wanted it checked too. |
Oh. I had just used a previously altered picture. No problem.
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jgrice53
Joined: 10 Dec 2014
Posts: 165
Location: marion, sc 29571
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| Posted: Sat Dec 20, 2014 8:05 pm Post subject: |
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okay
pin 62 3.2v
85 .8v
90 3.2v
92 3.2v
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jgrice53
Joined: 10 Dec 2014
Posts: 165
Location: marion, sc 29571
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| Posted: Sat Dec 20, 2014 8:06 pm Post subject: |
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i really have a time counting the pins...whew
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Sat Dec 20, 2014 8:13 pm Post subject: |
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| jgrice53 wrote: | okay
pin 62 3.2v
85 .8v
90 3.2v
92 3.2v |
Are these new numbers from the solder part of the board?
And do the pins up high not have these numbers?
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jgrice53
Joined: 10 Dec 2014
Posts: 165
Location: marion, sc 29571
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| Posted: Sat Dec 20, 2014 8:19 pm Post subject: |
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no they are up closer to the ic and test the same at the ic or the board, the problem is my pin counting, not where i took the measurement.
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Sat Dec 20, 2014 8:31 pm Post subject: |
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Ok. So the only one that is off now is pin 85 with .8v
Disconnect CP404 again and retest pin 85
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jgrice53
Joined: 10 Dec 2014
Posts: 165
Location: marion, sc 29571
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| Posted: Sat Dec 20, 2014 8:32 pm Post subject: |
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okay
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jgrice53
Joined: 10 Dec 2014
Posts: 165
Location: marion, sc 29571
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| Posted: Sat Dec 20, 2014 8:41 pm Post subject: |
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3.2v with cp404 disconnected and .8v connected
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Sat Dec 20, 2014 8:45 pm Post subject: |
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Remove the jumper wire on the power supply board.
Leaving CP404 disconnected do the error clear button sequence.
Then try turning on for normal startup.
If it shuts down again do the error check sequence and see if an error was set.
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Sat Dec 20, 2014 8:46 pm Post subject: |
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Wait, before you remove that jumper wire recheck pins 19,34,and 71
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jgrice53
Joined: 10 Dec 2014
Posts: 165
Location: marion, sc 29571
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| Posted: Sat Dec 20, 2014 8:58 pm Post subject: |
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okay, rechecking 19, 34 and 71
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jgrice53
Joined: 10 Dec 2014
Posts: 165
Location: marion, sc 29571
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| Posted: Sat Dec 20, 2014 9:10 pm Post subject: |
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19 3.2
34 3.2
71 3.2
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Sat Dec 20, 2014 9:13 pm Post subject: |
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OK. Continue with this then.
| macgyver655 wrote: | Remove the jumper wire on the power supply board.
Leaving CP404 disconnected do the error clear button sequence.
Then try turning on for normal startup.
If it shuts down again do the error check sequence and see if an error was set. |
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jgrice53
Joined: 10 Dec 2014
Posts: 165
Location: marion, sc 29571
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| Posted: Sat Dec 20, 2014 9:19 pm Post subject: |
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okay removing jumper
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jgrice53
Joined: 10 Dec 2014
Posts: 165
Location: marion, sc 29571
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| Posted: Sat Dec 20, 2014 9:30 pm Post subject: |
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It now comes on with overheat again
when I do the ALC/STANDARD SURR and Standby, it will go to clear and then OK but it does not seem to respond to the enter key when i press it the "OK"stays there until overheat shows up. the reset does not seem to be working either, the count is up to 5
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jgrice53
Joined: 10 Dec 2014
Posts: 165
Location: marion, sc 29571
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| Posted: Sat Dec 20, 2014 9:31 pm Post subject: |
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all of this is with CP404 disconnected
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jgrice53
Joined: 10 Dec 2014
Posts: 165
Location: marion, sc 29571
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| Posted: Sat Dec 20, 2014 9:39 pm Post subject: |
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it clears the error counts but it goes straight to overheat while in that mode
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jgrice53
Joined: 10 Dec 2014
Posts: 165
Location: marion, sc 29571
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| Posted: Sat Dec 20, 2014 10:03 pm Post subject: |
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To be clear, what i mean is that the clear error process does clear the error count but overheat starts flashing at the end of the process and I go back and check the erow count and it has already set another one
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Sat Dec 20, 2014 10:35 pm Post subject: |
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We are going to have to skip ahead on this. I am still not convinced the cpu is the problem. I am not seeing any other protect lines but it does seem like it is going into protect. And with pin 85 going down to .8v when CP404 is connected clearly shows a problem on the amp board. So I think we need to solve the amp board problem and hopefully it will stop the error shutdown. There may be a protection I am not seeing.
First tests will be with the receiver unplugged and DMM on diode test. You are just checking to see if any 2 legs are shorted on these transistors. Just test across any legs looking for short.
Q417 and Q405
If no shorted legs then test the output transistors, Q404,Q410,Q416,Q422,Q428,Q434,Q440,Q446,Q452,Q458
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jgrice53
Joined: 10 Dec 2014
Posts: 165
Location: marion, sc 29571
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| Posted: Sat Dec 20, 2014 10:43 pm Post subject: |
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are all of these on the bottom of the amp board connected to the heat sink?
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