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Old 11th October 2012, 11:46 AM   #71
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Fully clockwise

R1037:0
R1040:0
R1029:0
R1030:0
R1032:0

Fully counter clockwise


R1037:0
R1040:0
R1029:0
R1030:0
R1032 :0

Theese voltages are with Q1009 and Q1010 lifted

Heres the datasheet i went by for the bias transistors
MUN2111T1 pdf, MUN2111T1 description, MUN2111T1 datasheets, MUN2111T1 view ::: ALLDATASHEET :::

If thats correct pin config heres what i get on the bias transistor

Base:0.40
Emitter:-0.43
Collector:0.47
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Old 11th October 2012, 12:27 PM   #72
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Does 0v mean 0.000v?

What is the DC voltage across pins 1 and 2 (from the pin configuration on the datasheet you posted) for D1006 and D1007?
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Old 11th October 2012, 12:33 PM   #73
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Yes it means 0.000

D1006:0.44

D1007:0.06
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Old 12th October 2012, 10:35 AM   #74
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Lift Q2009 and Q2010 in the other channel and confirm that you read 0.000v across all corresponding resistors in that channel and confirm that you have essentially 0v across the speaker terminals for the 2000 series channel.
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Old 12th October 2012, 11:57 AM   #75
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Lifted Q2009 and Q2010 and get 0.000 volts acros all the 2000 series resistors as well..

I get 0.02 volts across the speaker terminals
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Old 12th October 2012, 12:49 PM   #76
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At one time, the amp was burning the 604 ohm resistors. What did you do to stop that?
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Old 12th October 2012, 12:58 PM   #77
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I replaced the LM317 and The LM337 and it stopped burning the resistors..

The crazy thing about this amp is If i lay my finger across the board around the Q1000 all th way to Q1005 I can get the distortion to go away and output is clean


If i do the same for the 2000 series parts that channel also has clean output as soon as i remove my finger from the board the distortion comes back..

I removed all the components in that area (1000 series parts) cleaned the board and resolderd everything still distorts until i lay my finger across the board..

If i try to bridge the amp Left + right - i get very lil output almost no output at all
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Old 14th October 2012, 04:09 AM   #78
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I'm assuming that you tried this previously (not recently where Q1009, Q1010, D1002-2005 are supposed to be out of the board).
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Old 14th October 2012, 04:55 AM   #79
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correct
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Old 14th October 2012, 06:20 AM   #80
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I'm stumped for now. You've verified that all of the various supplies are present and it appears that you've checked all components in the channel. Generally, when both channels are affected, the problem is a power supply or control issue.

email me.
babin_perry@yahoo.com
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