Search results

Here is a pic of the output devices on the back of the unit.

any suggestions on what i should look for to get it back into proper bias? I have the pots turned all the way down and still have about 470mV across each resistor when checking bias. thanks.

I have a PL400 series 2 that runs very hot...infact it shut off earlier tonight. I knew it was running warm and planned on checking bias when necessary...it was necessary. I checked the voltage across the 10Ω resistor as needed and it was over 550mV on left and 510mV on the right. I...

thanks to all of your help...i was in error....it was DC voltage. I was on the wrong meter setting and didnt realize it. I have put this one aside for a bit. I have 3 more of them I am currently updating to WOPL standards. thanks

Thank you for all of your help. I will begin to tear into it in about 2 or 3 weeks. Got a few business trips to do in the mean time. I looked at your service bulletin and it is hard to read several areas. I have another copy that is not much better. Does anyone have one that is actually...

its a Fluke.

soon as I get a chance to take it apart I will post pics. thank you.

I just bought this beautiful 400 series 2 but get 85 volts AC with no input. DC output in in the mV range. It shows up after about 2 seconds after i turn it on. The input sensitivity adjustment has no effect on output. Any suggestions on where to start to look for issues? thanks in advance

thanks for the tip

Does anyone have any idea what the values are for the input sensitivity control pots? Or a place that sells replacements. I could also use a couple of new knobs. I recently bought this amp that has seen less than delicate treatment but plan on working its way through a full upgrade as time goes.