brutus 2000

timwebb · 17th October 2011, 02:37 AM

here are the voltages for the two tl072c. is the first one bad?

1. 0.83
2. 0.07
3. 0
4. 0.6
5. 0
6. 4.6
7. 0.87
8. 15

1. 14.8
2. 14.4
3. 14.3
4. .06
5. 14.3
6. 14.5
7. 14.5
8. 15.0

Perry Babin · 17th October 2011, 02:42 AM

It has no negative supply voltage.

Is this for an amp that you asked about earlier?

timwebb · 17th October 2011, 02:45 AM

there is no negative voltage. yes this is the amp from earlier.

Perry Babin · 17th October 2011, 02:59 AM

Why did you start a new thread?

Post a link to the other thread.

timwebb · 17th October 2011, 03:03 AM

quick question

Perry Babin · 17th October 2011, 03:09 AM

When you have a thread started for a particular repair, it makes it much easier to help if you add to the thread than if you start a new thread, particularly when you don't include the full model number.

If the op-amps were two of those in the photo, the negative supply voltage is missing. Find the negative voltage regulator and determine why it's not producing any output.

17th October 2011, 02:37 AM	#1
timwebb diyAudio Member Join Date: Jan 2010 Location: memphis tn	brutus 2000 here are the voltages for the two tl072c. is the first one bad? 1. 0.83 2. 0.07 3. 0 4. 0.6 5. 0 6. 4.6 7. 0.87 8. 15 1. 14.8 2. 14.4 3. 14.3 4. .06 5. 14.3 6. 14.5 7. 14.5 8. 15.0

17th October 2011, 02:42 AM	#2
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	It has no negative supply voltage. Is this for an amp that you asked about earlier? __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

17th October 2011, 02:59 AM	#4
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Why did you start a new thread? Post a link to the other thread. __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

17th October 2011, 03:09 AM	#6
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	When you have a thread started for a particular repair, it makes it much easier to help if you add to the thread than if you start a new thread, particularly when you don't include the full model number. If the op-amps were two of those in the photo, the negative supply voltage is missing. Find the negative voltage regulator and determine why it's not producing any output. __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

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17th October 2011, 02:45 AM	#3
timwebb diyAudio Member Join Date: Jan 2010 Location: memphis tn	there is no negative voltage. yes this is the amp from earlier.

17th October 2011, 03:03 AM	#5
timwebb diyAudio Member Join Date: Jan 2010 Location: memphis tn	quick question

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