[TechAssist] Re: Fisher AMP CA-9025...DEAD**more info
- From: "Jim Myers" <jr.myers@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Thu, 20 Sep 2001 16:18:22 -0500
Must not be a Fisher CA-9025 then, unless Fisher used that model number more
than one time. Maybe the one you are working on is just an amp, the one I
have a manual on is a receiver amp.
Jim Myers
jr.myers@xxxxxxxxxxx
----- Original Message -----
From: "Jeff Dougherty" <jeff@xxxxxxxxxxxxxxxxxx>
To: "Techsonline" <techassist@xxxxxxxxxxxxx>
Sent: Thursday, September 20, 2001 3:26 PM
Subject: [TechAssist] Re: Fisher AMP CA-9025...DEAD**more info
>
> Jim,
> Thanks for the help, but are we talking the same unit?
> This thing does not have an LCD display and now switch labeled 'power
> standby'.
> There is only one switch I am not sure what it is for is labeled 'source
> direct'
> I see no IC701, nor any 700 series on the main board. It looks like the
700
> series may be on the front board. There are only LED's on the front of
this.
>
> Jeff www.9-11-2001tragedy.com
> Help those affected by the NY/PA tragedy:
> The Red Cross needs is mobilizing a national blood drive and needs your
> help. Please call 800-GIVE LIFE, to find out where in your area you can
> donate blood.
> FAX 1-413-280-0677
> Intrepid Video & Electronics
> Harrisburg, PA 17111
> 717-909-8844
> www.intrepid-video.com www.tech-repair.net www.thetoolcaddy.com
>
>
> ----- Original Message -----
> From: "Jim Myers" <jr.myers@xxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Thursday, September 20, 2001 11:53 AM
> Subject: [TechAssist] Re: Fisher AMP CA-9025...DEAD**more info
>
>
> >
> > Jeff, I have a microfisch manual, can't print or fax it. The power
switch
> > turns on the standby 12v for the relay and is regulated to 5v by Q501
for
> > the microprocessor IC701. Pin 64 of IC701 should have 5v thru Q701 which
> is
> > used as a diode, 5v to the base and emiter, collector to pin 64. IC701
> pins
> > 19 and 20 are the xtal osc, pin 21 is reset, pin 47 is PROTECT NOT if
you
> > follow the meaning, pin 48 is PWR RELAY, pin 49 is SPKR RELAY.
> > Pin 48 must go high to turn on Q502 power relay driver. Something has to
> > tell the micro to output a high at pin 48 to turn the unit on from
standby
> > mode, I have a picture of it in mind and I think it is a switch to the
> right
> > of the lcd display that is called power standby, when pressed it should
> turn
> > the system on including the ac outlets on back to provide ac to the
other
> > parts of the system. If pin 47, PROTECT NOT is low this may keep it from
> > turning on. IC701 is under the lcd display on the front panel pc board
as
> I
> > recall.
> > Is this any help?
> > Jim Myers
> > jr.myers@xxxxxxxxxxx
> > ----- Original Message -----
> > From: "Jeff Dougherty" <jeff@xxxxxxxxxxxxxxxxxx>
> > To: "Techsonline" <techassist@xxxxxxxxxxxxx>
> > Sent: Wednesday, September 19, 2001 5:52 PM
> > Subject: [TechAssist] Fisher AMP CA-9025...DEAD**more info
> >
> >
> > >
> > > First, pressing power only lights the power standby light. Power LED
is
> > not
> > > lit.
> > > Power button is push switch, so no micro.
> > > Power Relay, no click, has 12 vdc on each side to ground, AC side has
> > > 120vac.
> > > Output transistors are not shorted and do not test open. Two small
> > > transistors, on same heat sink measure about 40 ohms from base to
coll.
> > > I did not find any open resistors, shorted caps, or open/shorted
diodes,
> > of
> > > course, I may have missed one.
> > > Heat sinks all check OK, no open traces and I looked very closely.
> > > Does this unit have a shut down circuit and would anyone have a print
> to
> > > fax me?
> > > Thank you for listening to my story.
> > > Jeff www.9-11-2001tragedy.com
> > > Help those affected by the NY/PA tragedy:
> > > The Red Cross needs is mobilizing a national blood drive and needs
your
> > > help. Please call 800-GIVE LIFE, to find out where in your area you
can
> > > donate blood.
> > > FAX 1-413-280-0677
> > > Intrepid Video & Electronics
> > > Harrisburg, PA 17111
> > > 717-909-8844
> > > www.intrepid-video.com www.tech-repair.net www.thetoolcaddy.com
> > >
> > >
> > >
> > > Help make your TechAssist online repair tips
> > > database better! Submit your fixes here:
> > > http://www.circuitwork.com/techassist/tip/#tips
> > > To unsubscribe write to:
> > > techassist-request@xxxxxxxxxxxxx
> > > with unsubscribe in the subject line.
> >
> > Help make your TechAssist online repair tips
> > database better! Submit your fixes here:
> > http://www.circuitwork.com/techassist/tip/#tips
> > To unsubscribe write to:
> > techassist-request@xxxxxxxxxxxxx
> > with unsubscribe in the subject line.
> >
>
> Help make your TechAssist online repair tips
> database better! Submit your fixes here:
> http://www.circuitwork.com/techassist/tip/#tips
> To unsubscribe write to:
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