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Old 7th November 2009, 03:35 AM   #41
fongman is offline fongman  United States
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r220: .132v

r221: .018v
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Old 7th November 2009, 03:43 AM   #42
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With the voltages you posted, it appears that Q203 is defective. You need to replace Q202 and Q203 together from the same batch of parts.
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Old 7th November 2009, 04:04 AM   #43
fongman is offline fongman  United States
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Are the parts for these MMBT3904L and MMBT3906L?
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Old 7th November 2009, 04:09 AM   #44
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MMBT5088L according to the schematic. If you have the 3904 on hand, they may work well enough to allow further troubleshooting.
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Old 7th November 2009, 04:30 AM   #45
fongman is offline fongman  United States
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I don't have any of them, i will get some tomorrow. I hope the shop here have some?
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Old 8th November 2009, 04:59 AM   #46
fongman is offline fongman  United States
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Q202 and Q203 was replace and now the amp is working fine. Thank you Perry, i would of not gotton this amp to work without you.
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