CT Sounds CT4000.1D

[Jason Smith 616]

Replaced all of the power supply fets Also replaced all of the outputs..Rebuilt the audio driverboard -- Replaced the 4 IR21844's replaced the LM211.TL072,LM2903 also replaced all the smd transistors on the driverboard..Amp powers up and idle's fine i have + - 147 volts of rail voltage I have the +- 15 volts ,12 volts and 5 volts of regulated voltages..Amp will not produce any output..What am i over looking anyone have any ideas?

 

[MarioRestucci]

Do you have a clean audio signal to input Pin of driver board?

 

[Jason Smith 616]

which one is the input pin ?

 

[MarioRestucci]

which one is the input pin ?

Post a photo and code of the driver board.

 

[Jason Smith 616]

Im gonna have to contact the admin it wont let me post pics

 

[MarioRestucci]

Im gonna have to contact the admin it wont let me post pics

try uploading photos to external image sharing site.

 

[Jason Smith 616]

Im getting audio signal to the driverboard..Problem im having is the outputs are sitting at rail I get no rail to rail oscillation..Is the a common thing that goes bad or anyone have any ideas on why this amp has no rail to rail oscillation?

 

[MarioRestucci]

Im getting audio signal to the driverboard..Problem im having is the outputs are sitting at rail I get no rail to rail oscillation..Is the a common thing that goes bad or anyone have any ideas on why this amp has no rail to rail oscillation?

if u can post photo or model number of driver board, maybe, we can help you.
The problem is still surely coming from the driver card.
TAKE THESE TESTS:
Solder a 10k resistor bgetween pins 1 and 2 of U3 and a bridge on pin 2-3 of all IRS21844, in this way, you should observe the pwm signal directly on pins 1 of all IRS21844.
Also checks the signal on pin 7 of LM211/311 and pin 1 of TL072 .

 

[Jason Smith 616]

Back to this amp..

I will post pics if needed..

This amp is just like all the other korean amps that use the audio driverboard with 4 IR21844S

Problem im having is the amp will not come out of mute..

Anyone have any ideas ?

 

[boot35]

I have been touched that in amplifiers taramps after repairing the output it is necessary to resetar the sircuito, otherwise it does not come out of protection way, that ct will not have something similar?

 

[boot35]

Could you achieve the audio on the tc? I have the same problem with a tc 4000 team

 

[Perry Babin]

Please don't post in a repair thread that was started by someone else unless you are trying to help them.

Start a new thread.

 

[boot35]

Thanks Perry.