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Old 26th July 2011, 10:10 PM   #1
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Default Sony XM-2002GTW

This amp is stuck in protection mode all outputs test fine..

Heres what i have on the 594

Pin 1:13.40
Pin 2:3.04
Pin 3:4.85
Pin 4:0.47
Pin 5:1.47
Pin 6:3.66
Pin 7:0
Pin 8:13.91
Pin 9:0.46
Pin 10:0.08
Pin 11:13.91
Pin 12:13.91
Pin 13:5.00
Pin 14:5.00
Pin 15:3.04
Pin 16:0

Any Ideas ??
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Old 26th July 2011, 11:15 PM   #2
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Pull Q801. Does it still go into protect mode?

Be careful. Be prepared for excessive current draw.
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Old 26th July 2011, 11:20 PM   #3
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found it And pulled Q801 amp powers up and plays clean audio

Last edited by mike49504; 26th July 2011 at 11:24 PM.
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Old 26th July 2011, 11:26 PM   #4
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Reinstall it and pull Q114 and Q214 (one at a time) to see which one is causing the amp to shut down.
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Old 26th July 2011, 11:41 PM   #5
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Q114 is making it go into protect
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Old 26th July 2011, 11:43 PM   #6
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Is Q114 leaking/shorted?

If you install the transistor that in the location Q214 in place of Q114, does the amp go into protect mode again?
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Old 26th July 2011, 11:53 PM   #7
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If i put Q214 in Q114's spot amp goes back into protection
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Old 27th July 2011, 12:00 AM   #8
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Check for emitter resistors that are out of tolerance and broken solder connections on the emitter resistors.
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Old 27th July 2011, 12:45 AM   #9
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Checked all emitter resistors and touched up the solder on all of them Amps still in protection
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Old 27th July 2011, 01:54 AM   #10
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What is the DC voltage with the black probe on the source of Q109 and the red probe on the source of Q108?
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