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Old 7th October 2012, 07:18 PM   #11
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Can you list the voltages of each pin for us?
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Old 7th October 2012, 07:18 PM   #12
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Of the power supply pwm chip I mean...
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Old 9th October 2012, 02:15 AM   #13
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have to get it back on the bench
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Old 12th October 2012, 09:09 PM   #14
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which is the ower supply chip? I have the amp back on the bench ready.
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Old 13th October 2012, 04:46 AM   #15
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i would have to guess it's the 16-pin in your second pic. what is the part number of that one?
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Old 14th October 2012, 01:16 AM   #16
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tl494cn is the 16 pin
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Old 14th October 2012, 01:33 AM   #17
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That's the one! List out the voltages on each pin of that chip.
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Old 16th October 2012, 04:17 AM   #18
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Voltages are as follows:
1-5.2mV
2-2.75v
3-64mV
4-52mV
5-1.2v
6-3v
7-5mV
8-.6v
9-96mV
10-96mV
11-.67V
12-5.32v
13-4.34v
14-4.34v
15-4.2v
16-7.2mV
which pins should be reading AC voltage?
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Old 16th October 2012, 04:24 AM   #19
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sorry for long wait. computer problems as well....lol
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Old 16th October 2012, 09:06 AM   #20
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The input voltage on this IC is too low. Pins 8, 11 and 12 should be near 12v. Follow the circuit back to see why you don't have 12v on those pins.
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