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Crossfire CFA30HC
Crossfire CFA30HC
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Old 15th September 2020, 06:17 AM   #1
caraudioguy2100 is offline caraudioguy2100
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Default Crossfire CFA30HC

Anyone have any pics of the board ?

Or might be able to tell me the value of the resistors ?
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Old 15th September 2020, 09:52 AM   #2
Perry Babin is offline Perry Babin  United States
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In the power supply, is that resistor between the primary and secondary grounds?

In the audio circuit, the photos I have, have the same resistor burned, but not as badly. I don't know if the multiplier band is reliable. Does it connect between the shield ground and the secondary ground?
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Old 15th September 2020, 10:09 AM   #3
caraudioguy2100 is offline caraudioguy2100
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The resistor in the power supply connects between primary and secondary ground


The resistor that is burned connects to the shield ground of the rca and the secondary ground
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Old 15th September 2020, 10:25 AM   #4
Perry Babin is offline Perry Babin  United States
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A 1k in the power supply should work.

The color bands in the photo I posted may be right.
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Old 16th September 2020, 01:51 AM   #5
caraudioguy2100 is offline caraudioguy2100
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Back to this amp .

Replaced the resistors amp powers up and had audio but the left channel has very low output .

Any ideas on where to start looking ?

I cleaned all switches and it made no difference
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Old 16th September 2020, 02:21 AM   #6
Perry Babin is offline Perry Babin  United States
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The preamp signal for both channels should be equal on the inter-board header. Are they equal?
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Old 16th September 2020, 03:14 AM   #7
caraudioguy2100 is offline caraudioguy2100
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Yes they are equal
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Old 16th September 2020, 03:26 AM   #8
Perry Babin is offline Perry Babin  United States
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What are the part numbers on Q131/231?

Does one terminal connect do the secondary ground?
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Old 16th September 2020, 03:40 AM   #9
caraudioguy2100 is offline caraudioguy2100
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D1302

And yes one of its terminals connects to secondary ground
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Old 16th September 2020, 03:46 AM   #10
Perry Babin is offline Perry Babin  United States
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Pull them and see if the channels equalize.
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