[TechAssist] Re: 2nd request Fisher AMP CA-9025
- From: "Don Hartigan" <hartstv@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Sat, 22 Sep 2001 16:19:03 -0300
Jeff: before you quit on this one,check the following;IC501=18Vreg,Q506
emmiter=-ve 18V,Q505emmiter=13v,Q501&503emmiter=5v .
Sorry for the poor quality print &hth.
regards..Don of HARTS-TVCR
----- Original Message -----
From: "Jeff Dougherty" <jeff@xxxxxxxxxxxxxxxxxx>
To: "Techsonline" <techassist@xxxxxxxxxxxxx>
Sent: Saturday, September 22, 2001 12:04 PM
Subject: [TechAssist] 2nd request Fisher AMP CA-9025
>
> Thanks to Don for faxing me the schematic. Some of the info is hard to
read.
> (Original info below)
> If I jump the relay, I do have 60v on output transistors and on main big
> capacitors, but it still appears to be in stand by mode.
> Any other suggestions before I give up on this one?
> 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
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> Intrepid Video & Electronics
> Harrisburg, PA 17111
> 717-909-8844
> www.intrepid-video.com www.tech-repair.net www.thetoolcaddy.com
>
> 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.
>
>
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