Re: Amplifone problems...... I'm losing my mind....

Thanks for the suggestions..

But, that's not it... I have replaced the regs 4 times... It's not helping, the
diodes are good.

I am getting 0 at the +24.

My -24 is good.
My +30s are good.

The BU is good. The 555 circuit is good.
The 2n3904s are good
MC1 and the small xformer are good
The MPSU07 is good.
The SCR is good.
The caps are good.
The HV diode is good.

Any ideas?

MKDUD@aol.com wrote:

> In a message dated 3/6/2002 10:52:29 PM Eastern Standard Time,
> joe.bachmann@newmail.net writes:
>
> << Amplifone HV board. 7824 and resistor get very warm, but don't get
> damaged. No HV. 0 volts at the +24. Wiring harness is good. I am testing a
> dead
> short between the +30 side and the +24 side of the harness. All
> semiconductors
> have been replaced with known good. All caps are good and all electrolytics
> have
> been replaced. Square wave off 555 is fine, but not when cennected with the
> rest
> of the circuit - It's just a wave form like an audio waveform. >>
>
> Does this board have diodes at the regs? If you have a shorted one, this
> would cause the 0v at the +24reg. Replace this reg ias well as the diode if
> the diode is the problem..
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Received on Sat Mar 9 00:45:37 2002