Kyle audio Trax1-1800D

[imraneesa]

Hi all

The board is missing two resistors just on top of 393 IC. If anybody know about the parts please help me to fix this. Attaching the pictures.

 

[imraneesa]

Pictures

 

[Perry Babin]

Download the following SM and look at page 7. Are they the same?

HERTZ EP1D Service Manual download, schematics, eeprom, repair info for electronics experts

 

[imraneesa]

Yes it is exactly the same. Will this amp oscillate without main rectifiers? I am not getting no vcc voltage on ic.

 

[Perry Babin]

Are you getting rail voltage?

 

[imraneesa]

Rail voltage is possible only if I have rectifiers on board. As I install rectifiers it going into protect. I removed them to test small voltages.

 

[Perry Babin]

If you power up through a limiter, will it go into protect?

The following seem o be in conflict. Please clarify.

Rail voltage is possible only if I have rectifiers on board. As I install rectifiers it going into protect.

 

[imraneesa]

I mean rail voltage comes from main rectifiers right.
Without them in board no rail voltagebis generated.

If I remove the main rectifiers amp is coming on. But with main rectifiers amp goes straight to protect and tries to start and protect. It keeps cycling. This is with current limiter.
With current limiter also it goes into on and protection cycle.

 

[Perry Babin]

There are two optocouplers in the driver area, one optocoupler at a time, bridge terminals 1 and 2. Does bridging either optocoupler stop the amp from going into protect?

Are the output FETs in the circuit?

 

[imraneesa]

Yes bridging ic6 opto making amp on. Output fets are in the board.

 

[Perry Babin]

Will the amp produce rail-rail oscillation with IC 6 bridged?

If so, does it also produce clean audio?

 

[imraneesa]

No it is not producing oscillation as i on the amp it oscillates for just fraction of second and it cuts off..

 

[Perry Babin]

Are you driving a signal into it?

 

[imraneesa]

Yes I am driving signal 100hz.

 

[Perry Babin]

Is the 2184 properly soldered in?

Do you see a drive signal on the input of that IC?

 

[imraneesa]

Yes I am seeing drive signal on input. Shutsown pin is having only 0.6v that is pin 2 of 2184.

 

[Perry Babin]

Lift the equivalent of Q13 on the diagram. Does that allow pin 2 to go high?

 

[imraneesa]

Yes it goes high 5v. But still no oscillations. Input pin has oscillations.

 

[Perry Babin]

What is the voltage across pins 3 and 5 of the 2184?

 

[imraneesa]

14.3v