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Old 28th June 2012, 02:35 AM   #1
DREW028 is offline DREW028  United States
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Default bxi1205

Amp power on and seems fine. With no speakers connected, when I turn the gain up on the amp and increase the input it goes into protect. I can hear music playing on the board. It sound like it coming from the relay. Any ideas?
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Old 28th June 2012, 02:38 AM   #2
DREW028 is offline DREW028  United States
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The ouput is very distorted and squeaky ( testing on a 6x9)
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Old 28th June 2012, 02:52 AM   #3
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If it uses the DWM0608 board, the most likely suspects are Q11 and Q7 on the audio driver board.

There may be other problems also.

Does it draw excessive current as it goes into protect?
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Old 28th June 2012, 03:09 AM   #4
DREW028 is offline DREW028  United States
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The squeal is there with no input and if move the cone of the speaker it cuts in and out. I have a 7.5 amp fuse installed and it hasn't popped. It does appear to use that board. If I touch the drain tab of the outputs transistors it changes the squeal from the speaker.
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Old 28th June 2012, 03:11 AM   #5
timwebb is offline timwebb  United States
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i think u might have a bad ground.
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Old 29th June 2012, 12:52 AM   #6
DREW028 is offline DREW028  United States
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Internally? I'm powering the amp with a power supply.
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Old 29th June 2012, 12:54 AM   #7
DREW028 is offline DREW028  United States
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Oh man, not one of these again. Amp is working now.
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Old 29th June 2012, 03:31 AM   #8
DREW028 is offline DREW028  United States
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Back to the same problem. Q7 is 2d and q11 is 1d correct?
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Old 29th June 2012, 03:43 AM   #9
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That's correct.
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Old 30th June 2012, 08:42 PM   #10
DREW028 is offline DREW028  United States
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Do you know the value of r24 on the driver board? This 1 is broken in half and soldered end facing up. Doesn't appear to burn marks.
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