[TechAssist] Re: [TechAssist]**Fixed** 2nd request Fisher AMP CA-9025
- From: "Jeff Dougherty" <jeff@xxxxxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Wed, 26 Sep 2001 00:11:42 -0400
Thanks to everyone for the help on this, especially Don Hartigan for the
print and detailed help and Neil Leipziger for the final solution:
Problem turned out to be in shut down, basically resetting the micro
restored operation.
This is done by holding the "tuner" button in for about 30 seconds , let go
and power restored.
For those of you recording tips, that care about this old CTC136:
Problem was volume full force at power on, then intermittent.
Fix was broken solder in MTT002, top corner near connector plugs.
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: "Jeff Dougherty" <jeff@xxxxxxxxxxxxxxxxxx>
To: "Techsonline" <techassist@xxxxxxxxxxxxx>
Sent: Saturday, September 22, 2001 11:04 AM
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
> 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
>
> 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.
>
>
> Help make your TechAssist online repair tips
> database better! Submit your fixes here:
> http://www.circuitwork.com/techassist/tip/#tips
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>
>
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