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Old 20th March 2012, 01:04 AM   #1
DREW028 is offline DREW028  United States
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Default hifonics bxi2010d

The amp powers and but switches to protect mode. I pulled all the output FETs and they tested fine. With all outputs fets removed the amp stays on 3 more seconds before switching to protect.
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Old 20th March 2012, 01:13 AM   #2
timwebb is offline timwebb  United States
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u check the output transistors? i know they randomly fail.
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Old 20th March 2012, 03:36 AM   #3
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Are you 100% sure that there are no solder bridges between the solder pads for the output transistors?
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Old 20th March 2012, 11:00 AM   #4
DREW028 is offline DREW028  United States
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No, I did not see any.
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Old 20th March 2012, 11:14 PM   #5
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Pull the output driverboard and see if it still goes into protection
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Old 20th March 2012, 11:16 PM   #6
DREW028 is offline DREW028  United States
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While test I shorted q288 its marked c3228 yk842. This is a ktc3228 correct?
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Old 20th March 2012, 11:21 PM   #7
DREW028 is offline DREW028  United States
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Before I made my dumb mistake the gates of q204 203 202 214 215 216 were getting a straight 18v before going into protect. This was with all output transistors removed.

Last edited by DREW028; 20th March 2012 at 11:25 PM.
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Old 20th March 2012, 11:41 PM   #8
DREW028 is offline DREW028  United States
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With Q288 installed the amp was going straight into protect. After I removed it its back to turning on and switching to protect.
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Old 20th March 2012, 11:52 PM   #9
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Pull the output driverboard once removed see if the amp will remain powerd up..
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Old 21st March 2012, 12:13 AM   #10
DREW028 is offline DREW028  United States
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Yup its stays on. Nice. I wanted to pull it out yesterday but wasn't sure if it was safe.


U4 and u13 are either very cheap or got hot. What part number are they?

Last edited by DREW028; 21st March 2012 at 12:22 AM.
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