Rockford fosgate 800A2

[mike49504]

I got this amp in for repair first problem i noticed is the amp wont power up..

Here what i have on the TL494

PIN1:0
PIN2:4.76
PIN3:0.06
PIN4:4.87
PIN5:1.48
PIN6:3.29
PIN7:0
PIN8:13.21
PIN9:0
PIN10:0
PIN11:13.21
PIN12:13.21
PIN13:4.91
PIN14:4.91
PIN15:4.91
PIN16:0

 

[Perry Babin]

Pin 4 is being driven high. Post the DC voltage on the 339.

Pin 1:
Pin 2:
Pin 3:
Pin 4:
Pin 5:
Pin 6:
Pin 7:
Pin 8:
Pin 9:
Pin 10:
Pin 11:
Pin 12:
Pin 13:
Pin 14:

 

[mike49504]

Pin 1: 0
Pin 2: 1.28
Pin 3: 13.22
Pin 4: 0.4
Pin 5: 2.31
Pin 6: 4.91
Pin 7: 1.75
Pin 8: 4.34
Pin 9: 4.91
Pin 10: 4.91
Pin 11: 8.22
Pin 12: 0
Pin 13: 1.28
Pin 14: 1.28

 

[Perry Babin]

Is this PC-2360 or PC-3092?

If not, what is it?

Is Q9 leaking or shorted?

 

[mike49504]

Its another one of theese amps that i cant find a schematic for..

Board is marked PC-2038-G

 

[Perry Babin]

Email Rockford for a copy of the schematic diagram and send me a copy.

Did you check Q9?

 

[mike49504]

Replaced Q9 and the amp powers up but draws excessive current

 

[mike49504]

Sent

 

[mike49504]

So can i lift the legs of the STRP15's to see if the current draw is from the power supply or output section?

 

[Perry Babin]

Is the diagram you sent the one Rockford sent you? It's not the same board number.

Connect only remote and ground. What do the pulses on the power supply FET gates look like?

 

[mike49504]

Yes its the one Rockford sent me i told them the board number and i also told them the serial number off the board..

And they told me its the same schematic for all the Punch 800A2's

I have to find a camera since mine is broken and ill get back to you..

 

[mike49504]

Scope set to 2 volts/div and 5 us this is what i get on the gate legs of the power supply fets with only ground and remote hooked up..

 

[Perry Babin]

Set the trace (no input to the scope) to one major division from the bottom of the display. Set the coupling to DC instead of AC and post another image of the waveform. Unless there is a good reason to use AC coupling, you should always use DC coupling. Try to take the photo at less of an angle.

 

[mike49504]

Scope is set to Dc coupling i double and triple checked that. Heres a new photo

 

[vincegironda]

PC-3092

Does anybody know which RF amp has the PC-3092 board?

Is this PC-2360 or PC-3092?

If not, what is it?

 

[vincegironda]

PC-3092 is Punch 800.2

 

[Perry Babin]

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