Power Acoustic OV1-5500D

Perry Babin · 2013-11-15 3:20 pm

That's not a problem.

S Merlington · 2013-11-15 3:30 pm

Ok ive replaced every transistors on the driverboard with new also replaced the 4580D checked all resistors and all test fine.. iodes also check fine..

I checked for solder bridges and have none..

I will re-install the board and post back

S Merlington · 2013-11-15 3:35 pm

Ok Reinstalled the driverboard and i get 0.21 volts on the positive speaker terminal..

I will reinstall the low side fets and see what i come up with

S Merlington · 2013-11-15 3:56 pm

Ok i noticed a diode thats bad its marked UF4003 is that the same as a 1N4003??

It connects to the center leg of the outputs

Perry Babin · 2013-11-15 4:17 pm

No. It's an ultra-fast rectifier. The 1N series is a general purpose (doesn't work well at high frequencies) rectifier.

S Merlington · 2013-11-15 6:31 pm

Ok replaced the diode with the orginal part number put all parts back in the amp and it powers up and idles perfectly now..

back to the orginal problem..

Before i switched the master slave switch back and fourth and would get current draw when doing so.. That problem is gone also..

Now the problem is i have no out from the amp

I dont get rail to rail oscillation

Any ideas where to go from here??

S Merlington · 2013-11-17 6:36 am

I been testing stuff all day in this amp i dont get it ..

I have no output at all ..

And ideas ?? maybe something i overlooked?

S Merlington · 2013-11-17 6:58 am

Perry,

Do you know how i can disable the protection in this amo??

S Merlington · 2013-11-17 7:54 am

Ok I figured out why the amp protected again that problem is solved..

I still get no outpit from this amp at all..

Any ideas on what to check??

S Merlington · 2013-11-17 8:39 am

Perry,

All op-amps have 0.00 volts on Pins 1,2,3,5,6,7 and have the correct + - 15volts on pins 4 and 8 besides theese 2 op-amps..

The voltage on the pins are

Leg 1:-8.34
Leg 2:-3.14
Leg 3:0.00
Leg 4:-13.28
Leg 5:-8.26
Leg 6:-8.26
Leg 7:-8.26
Leg 8:13.64

The other op-amp

Leg 1:-8.30
Leg 2:-8.30
Leg 3:-8.30
Leg 4:-13.28
Leg 5:-8.30
Leg 6:-8.30
Leg 7:-8.30
Leg 8:13,28

Is this normal for theese 2 op-amps or do the appear to be defective?

Perry Babin · 2013-11-17 9:25 am

Which voltages are from IC106 and which from IC107?

S Merlington · 2013-11-17 9:45 am

IC106

Leg 1:-8.34
Leg 2:-3.14
Leg 3:0.00
Leg 4:-13.28
Leg 5:-8.26
Leg 6:-8.26
Leg 7:-8.26
Leg 8:13.64

IC107

Leg 1:-8.30
Leg 2:-8.30
Leg 3:-8.30
Leg 4:-13.28
Leg 5:-8.30
Leg 6:-8.30
Leg 7:-8.30
Leg 8:13.28

Perry Babin · 2013-11-17 11:37 am

106 appears to be defective.

Power Acoustic OV1-5500D

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