Rockford Fosgate Prime R1200-1D V1.0

[cajones65]

Looking for a little help on this Rockford Fosgate R1200.1d V. The amp is in protect. I have pulled the outputs. I pulled 2 drivers (low side) because I had 23 ohms between gate and drain of Q513 and Q514. I pulled the IRS2092 and the 23 ohms went away. So I replaced the IRS2092. But soon as I applied power the 2092 went up in smoke. Fixing to pull the IC again.

 

[Perry Babin]

Confirm that the regulated voltages feeding the IC are as they should be.

 

[cajones65]

Perry don't think so. Ref from pin 2 (grd) to pin 1 I only have 7.8 volts and it is dropping. But now with the IC pulled it is not in protect. I have my 12 volts and 15 and -15 on the regulators.

 

[cajones65]

Voltages on the IRS2092 ref to power grd. This is a new chip. I am not sure what the voltages are suppose to be.
01: 5.1
02: 0
03: 0
04: -4.9
05: 0
06: -4.9
07: -53.96
08: -53.96
09: -59.14
10: -59.2
11: -59.2
12: -59.2
13: 1.97
14: 1.97
15: 13.8
16: 7.53

 

[cajones65]

I did replace an open 10 ohm resistor to pin 1 from power supply. Now I have 5 volts on pin one as you can see from the voltages above.

 

[Perry Babin]

I don't see anything that would destroy the IC but pin 12 should be 12v above the negative rail.

The ±5v regulators appear to be OK.

 

[cajones65]

Well with the IC back in circuit it's back into protect, the IC is not getting hot. I must have had a solder bridge. Still back at square one.

 

[cajones65]

So I should follow pin 12 to where ever it is going to?

 

[cajones65]

Problem may be somewhere around the LM339. The supply voltages look a little off to me. Voltages were ref to power grd.


01: .039
02: 4.6
03: 5
04: 2.7
05: 4.6
06: 4.9
07: 2.5
08: 2.5
09:4.6
10:3.2
11: 4.6
12: 0
13: 4.6
14:0

 

[cajones65]

After tracing back from pin 3 of the LM339 chip, I see that the correct supply voltage is 5v.