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Thread Tools |
15th September 2020, 07:17 AM
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#1 |
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diyAudio Member
Join Date: Aug 2010
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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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15th September 2020, 10:52 AM
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#2 |
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diyAudio Member
Join Date: Nov 2003
Location: Louisiana
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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?
__________________
Anyone who purchased the repair tutorial, email me (babin_perry@yahoo.com) if you want to download the latest version. |
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15th September 2020, 11:09 AM
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#3 |
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diyAudio Member
Join Date: Aug 2010
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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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15th September 2020, 11:25 AM
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#4 |
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diyAudio Member
Join Date: Nov 2003
Location: Louisiana
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A 1k in the power supply should work.
The color bands in the photo I posted may be right.
__________________
Anyone who purchased the repair tutorial, email me (babin_perry@yahoo.com) if you want to download the latest version. |
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16th September 2020, 02:51 AM
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#5 |
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diyAudio Member
Join Date: Aug 2010
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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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16th September 2020, 03:21 AM
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#6 |
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diyAudio Member
Join Date: Nov 2003
Location: Louisiana
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The preamp signal for both channels should be equal on the inter-board header. Are they equal?
__________________
Anyone who purchased the repair tutorial, email me (babin_perry@yahoo.com) if you want to download the latest version. |
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16th September 2020, 04:14 AM
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#7 |
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diyAudio Member
Join Date: Aug 2010
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Yes they are equal
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16th September 2020, 04:26 AM
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#8 |
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diyAudio Member
Join Date: Nov 2003
Location: Louisiana
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What are the part numbers on Q131/231?
Does one terminal connect do the secondary ground?
__________________
Anyone who purchased the repair tutorial, email me (babin_perry@yahoo.com) if you want to download the latest version. |
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16th September 2020, 04:40 AM
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#9 |
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diyAudio Member
Join Date: Aug 2010
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D1302
And yes one of its terminals connects to secondary ground |
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16th September 2020, 04:46 AM
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#10 |
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diyAudio Member
Join Date: Nov 2003
Location: Louisiana
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Pull them and see if the channels equalize.
__________________
Anyone who purchased the repair tutorial, email me (babin_perry@yahoo.com) if you want to download the latest version. |
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