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Old 8th May 2011, 11:06 PM   #1
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Default Hifonics XX Chaos

With black probe on the ground terminal and red probe on the rca ground shield i get 0.987K ohms.

With amp powerd up i get 13.27 volts on the rca ground shields.

Any idea where to start checking?

Last edited by mike49504; 8th May 2011 at 11:09 PM.
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Old 8th May 2011, 11:10 PM   #2
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yeah sounds like one of the output tansistors is shorted
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Old 8th May 2011, 11:26 PM   #3
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How can it be a shorted output when there is 0 volts on the outputs and the voltage is on the RCA shields?
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Old 8th May 2011, 11:43 PM   #4
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sorry didn't notice rca shields, same voltage as the input, sounds like a bad zener did you check them?
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Old 9th May 2011, 12:52 AM   #5
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What's the resistance from the B+ connector to the RCA shields?

Check this with no power applied.
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Old 9th May 2011, 01:10 AM   #6
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0.489 M ohms From B+ to RCA Shields
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Old 9th May 2011, 01:13 AM   #7
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If you ground the RCAs, does the current draw increase?

What's the resistance between the RCA shields and the non-bridging speaker terminals?
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Old 9th May 2011, 01:18 AM   #8
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0.4 ohms from rca shield to non-bridging speaker terminal.

If i try to ground out the rca shields Amp draws 60 + amps of current .

Now since i tryed that the amp idles high now around 10 amps.
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Old 9th May 2011, 01:32 AM   #9
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You should be working through a limiter.

Do you still have 0 ohms between the RCA shield and the non-bridging speaker terminals?

You may have an intermittently shorted transformer. Measure the resistance from the B+ terminal to the RCA shield while twisting the transformer. Does the resistance ever drop?
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Old 9th May 2011, 01:36 AM   #10
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from non briding speaker terminal to rca shield nw i havw 4 ohms.

When twisting the transformer i can get it to drop down to 0.8 ohms
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