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Mtx ta92001 distorted output.
Mtx ta92001 distorted output.
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Old 13th March 2019, 03:00 AM   #11
Perry Babin is offline Perry Babin  United States
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The op-amp nearest the LED appears to be defective. With the non-inverting input higher than the inverting input, the output on pin 6 should be high, not low.
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Old 13th March 2019, 11:22 AM   #12
kfx5050 is online now kfx5050  United States
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Cool beans. What's a good replacement op-amp for it? I think I have a few NE5532 or N5532 but no N5534 in right now.
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Old 13th March 2019, 11:34 AM   #13
Perry Babin is offline Perry Babin  United States
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The 5534 is a single. The 5532 is a dual. I know of no guaranteed working sub.
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Old 13th March 2019, 11:40 AM   #14
MarioRestucci is offline MarioRestucci  Italy
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Quote:
Originally Posted by kfx5050 View Post
Cool beans. What's a good replacement op-amp for it? I think I have a few NE5532 or N5532 but no N5534 in right now.
LM318 probably work
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Old 13th March 2019, 12:01 PM   #15
kfx5050 is online now kfx5050  United States
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Thank y'all I'm order some now. �� And let y'all know what happens
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Old 14th March 2019, 12:12 AM   #16
kfx5050 is online now kfx5050  United States
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I replace both op amps that are by led 400. The two large inductors by the power input are buzzing again but now I have 23 volts DC on the speaker output instead of 26.What is the value of the op amp that is located right in front of the RCA input.i have -15 and 15 volt at the op-amp by the RCA inputs but all the other pins show zero
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Old 14th March 2019, 12:14 AM   #17
kfx5050 is online now kfx5050  United States
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U301 looks to be the value location.
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Old 14th March 2019, 12:26 AM   #18
Perry Babin is offline Perry Babin  United States
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The voltages you posted for the op-amps indicated that one was bad. Repost the voltages for those two op-amps.

It's normal for most of the op-amps to have 0v on all but the power supply pins.
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Old 14th March 2019, 12:35 AM   #19
kfx5050 is online now kfx5050  United States
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Tl494c over by the inductors when I press it with my finger or tap on it the buzzing noise pulses and changes notes could there be something wrong with this semiconductor?
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Old 14th March 2019, 12:51 AM   #20
kfx5050 is online now kfx5050  United States
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Pin 1 0.009
2 0.005
3 0.003
4 -15.00
5 0.002
6 0.001
8 14.99
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