Audiobahn A2300HCX - Need Help!

[Perry Babin]

What is the DC voltage on the amp terminals?

With your multimeter set to DC volts, the black meter probe on the ground terminal of the amp (not on the point where the ground wire connected to the vehicle) and the head unit on (so the amp will have remote voltage applied), touch the red probe alternately to the B+ and remote terminals of the amp.

 

[piersm2]

11.5 on the remote and 11.95 on B+. Those are with the car running

 

[Perry Babin]

The amp appears to have blown the fuses again. Check them but don't replace them. Post what you find.

 

[piersm2]

the fuses on the amp or the inline fuses from the battery?

 

[Perry Babin]

The ones on the amp.

 

[piersm2]

The fuses are good. The fuse holder in the amp had a brass piece that looked like it had popped out. I tried to fix it and no luck

 

[Perry Babin]

Aren't there multiple fuses on the amp?

Are all of the fuse holders defective?

 

[piersm2]

there are 4 and the brass that snaps into the back of the fuse holder wasnt snapped it. That brass piece goes to the circuit board. All fuses are ok. Tried to fix fuse holder but no luck

 

[Perry Babin]

A single fuse holder shouldn't cause the amp to completely lose power. Can you post a photo of the area you're describing?

 

[piersm2]

Here is what I am describing. The brass piece thats on the back of the black fuse holder; where the arrow is pointing.

 

[Perry Babin]

What is the DC voltage on CP6, 7, 8 and 9?

 

[piersm2]

Do i just measure by putting the probe on the brass bar going from the fuse holder to the circuit board? Right by where it states the name (Like CP6)?

 

[Perry Babin]

Yes. On the copper bar. Black probe on the ground terminal of the amp.

 

[piersm2]

I got all the same readings. They were all about 13.1V

 

[Perry Babin]

With the black probe on the same point and remote voltage applied, are you still getting less than 5v to all pins of the 494?

 

[piersm2]

I checked all the voltages again and this is what I got:
1-.5v
2-4.93v
3-.07v
4-.51v
5-1.47v
6-3.39v
7-.02v
8-13.11v
9-6.2v
10-6.2v
11-13.94v
12-12.89v
13-4.94v
14-4.94v
15-4.94v
16-1.27v

 

[Perry Babin]

OK, with the black meter probe on one of the non-bridging speaker terminals, what's the DC voltage on the center leg of the large output transistors?

Don't allow the meter probe to short to the clamps on the transistors.

 

[piersm2]

where is the transistor?

 

[Perry Babin]

Virtually all of the components clamped to the heatsink are transistors. The large transistors are the output transistors.

 

[piersm2]

The output transistors on the speaker output side of the amp all read .25V and the ones on the B+ and ground side all read -.25V