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Old 3rd January 2011, 05:15 AM   #11
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It's normal for the resistor to get hot.

Is the square wave on all of the outputs swinging cleanly from rail to rail?
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Old 3rd January 2011, 05:28 AM   #12
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Is the square wave suppose to be there for a sec then nothing then there for a second then nothing and it just keeps doing that
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Old 3rd January 2011, 05:36 AM   #13
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No. It should be constant. Is the voltage on the center leg of the D1302 pulsing?
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Old 3rd January 2011, 05:39 AM   #14
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There are 2 D1302's in this amp both of them the center legs voltage is pulsing
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Old 3rd January 2011, 05:42 AM   #15
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If there's an LM293 near the 494, is pin 1 or 7 pulsing?
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Old 3rd January 2011, 05:45 AM   #16
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NO. But the A1266 is still removed controlling pin 16 on the 494
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Old 3rd January 2011, 05:49 AM   #17
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Can you post a photo (or 2 or 3) of the amp?
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Old 3rd January 2011, 06:04 AM   #18
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Heres some pics of the amp if you need pics of a certain part let me know
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File Type: jpg Picture 589.JPG (609.5 KB, 132 views)
File Type: jpg Picture 590.JPG (684.0 KB, 122 views)
File Type: jpg Picture 591.JPG (536.0 KB, 122 views)
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Old 3rd January 2011, 06:08 AM   #19
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What's the op-amp/comparator near the 494?

Are pins 1 or 7 pulsing on it?
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Old 3rd January 2011, 06:10 AM   #20
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The op-amp is a LM293 pins 1 and pin 7 stay constant at 0.01 volts
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