How much is the dc output

You should need 12V of DC Voltage at about 5mA which is equivalent to .5 Amp or 1/2Amp. 1000mA(milliamps) is Equivalent to 1 Amp. See the included pics- one is of my Charging Unit for a Nearly Identical Jumper Box. Hopefully this helps.

You can use a AC/DC adapter as pictured and it's ok to use one with a higher amp output, but you can't use one with a lower amp output or it simply won't charge.

The CD output means its Direct Current coupled, while the Normal output has a DC blocking capacitor in-series, thus limiting low frequency response.

You can can use both, but I wouldn't. (At least in a permanent setup)

This is not a simple question. Take this magnificent machine to a service shop.

afunta.com

What does the manufactor recomend?

It sounds like a defective/incorrect AC-to-DC adapter may have caused your problem. These adapter come with different output voltages, AC or DC output and different amperage ratings. AC-to-DC adapters list the polarity of the DC voltage as it relates to the DC power plug and you must match both the devices voltage and power requirements. As for the amp...not working on batteries either, I would suspect output transistors or IC.

I just found my Canon 5000F scanner to have a power supply outputting 3V DC instead of 12V DC. I replaced it with a 12V DC Power Supply from Tandy rated at 1.5 amps. I had the scans getting darker by the day and sometimes completely black. Now I have great scans again. Just test the voltage at the plug that supplies the scanner for a healthy 12V DC with a multimeter.

Fuse is blown because you may have bad DC to DC converter circuit (step up circuit from 12vdc to provide +-/- 30~40vdc) that supplys the power amp section. I can be that the output stage of the amp shorted out and it took out the DC to DC converter circuit.

Hello christensen7,

It sounds like there's DC current on the amp output terminals. Disconnect the sub and test the output with a multimeter. If there's DC there, most likely the amp is shorted internally and needs repair.

Hope this helps.

To get the clamps off click HERE.

There may be several bad components. Normally, shorted outputs (the most likely cause of DC on the outputs) causes the amp to go into protect mode. In your amp, you may have shorted output transistors, open emitter resistors and possibly a problem with the protection circuit.

To get up to speed on the basics, read through the following page:

Amplifier Repair Primer

After you read through that page, remove the clamps and check all of the output transistors to determine if any are shorted.

Let me know what you find.