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Old 19th June 2010, 02:17 AM   #1
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Default Directed D800

Im working on this amp when i recied the amp in for repair it was stuck in proctection mode I resoldered the rectifiers in it and checked all the outputs and power supply fets all tested good Now the amp wont power up at all Any ideas?
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Old 19th June 2010, 03:48 AM   #2
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Can you post a photo of the inside of the amp?
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Old 19th June 2010, 04:50 AM   #3
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Heres the board out of the sink
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File Type: jpg Picture 001.jpg (166.8 KB, 42 views)
File Type: jpg Picture 002.jpg (146.8 KB, 42 views)
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Old 19th June 2010, 05:21 AM   #4
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Post the voltages on the power supply IC.
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Old 19th June 2010, 06:43 PM   #5
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Kia494
1:0
2:0
3:0
4:0
5:0
6:0
7:0
8:13.91
9:0
10:0
11:13.81
12:0
13:0
14:0
15:0
16:0
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Old 20th June 2010, 01:08 AM   #6
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Pin 12 doesn't have any voltage. Follow the circuit for pin 12 back to the next transistor. It's likely open.
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Old 20th June 2010, 07:31 PM   #7
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Ok got the amp to power up and produce audio but its very distorted.

I have both + - rail voltages at the outputs and have + - 15 on all opamps.

I replaced the switches and pots.

I have 0.93 volts across the emitter resistors Amps outputs is very distorted Any ideas?
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Old 21st June 2010, 12:57 AM   #8
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Post a photo of the front of the driver board.
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Old 21st June 2010, 02:50 AM   #9
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Perry,

It had bad outputs replaced them and amp works perfect thanks again
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