[TechAssist] Re: Broksonic CTSGT-8118CTT power problem
- From: "J Silverman" <greentron@xxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Fri, 28 May 2004 13:31:22 -0400
I followed your instructions but did not see a problem there. Anyway I think
the relay is just in the degauss circuit. I dont have an Orion manual with a
board layout like this but I can see the fuse and switch transistors that
Orion uses in other models to switch the B+ on or off. Originally the parts
that were replaced were ones that get zapped from high voltage - the
feedback opto and its driver transistor. After that it worked for about a
half a minute and I cut it off when I saw that the current was starting to
rise. Now something else has failed and I cannot find it with a meter or a
scope. When I go back to it I will sub in voltages from a bench supply and
see if some load draws too much current.
Jerry Silverman
Greentron Inc
4 Newland Ave
Greenville SC 29609
864 232 3889
Fax 271 2080
mailto:greentron@xxxxxxx
----- Original Message -----
From: "Technotronic Dimensions" <steve@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Friday, May 28, 2004 12:55 PM
Subject: [TechAssist] Re: Broksonic CTSGT-8118CTT power problem
> Was this helpful or did the one you were working have a different circuit?
>
> Steve Hearns
> Technotronic Dimensions, NY [USA]
> WWW.TECHNOTRONIC-DIMENSIONS.COM
> 1-877-817-9885 (Voice / Fax Toll Free - US Only)
>
>
> ----- Original Message -----
> From: "Technotronic Dimensions" <steve@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Tuesday, May 25, 2004 1:37 PM
> Subject: [TechAssist] Re: Broksonic CTSGT-8118CTT power problem
>
>
> I think these Broksonics were all alot similar in design. Unsolder 1 Leg
> off the Diode accross the Coil (Power) Leeds of the Relay....check for
> leakage.
> Also trace where the Relay gets its power from on the B+ Side (Neg of the
> Diode)....if it leads to a Small Switch type transistor, I have seen where
> these will show leaky too, or may check ok on the DMM, but has Low Gain -
> usually close, but not enough to Drive a Relay. If one is questionable,
> change both.
>
>
> Steve Hearns
> Technotronic Dimensions, NY [USA]
> WWW.TECHNOTRONIC-DIMENSIONS.COM
> 1-877-817-9885 (Voice / Fax Toll Free - US Only)
>
>
> ----- Original Message -----
> From: "J Silverman" <greentron@xxxxxxx>
> To: <Techassist@xxxxxxxxxxxxx>
> Sent: Tuesday, May 25, 2004 1:20 PM
> Subject: [TechAssist] Broksonic CTSGT-8118CTT power problem
>
>
> Found Q507 (feedback opto driver) and IC506 (opto) open circuit in this
2000
> model Orion-made tvcr. Then was able to turn on power and after a few
> seconds could see snow and OSD on the crt. Current was 1/4 amp but it was
> slowly rising and I cut it off when it got to 1/2 amp. Could not find
> anything wrong so powered it up again but now relay just clicks quickly in
> and out when power button is pressed. While the relay is in I can see H/V
> sweep with a scope. Do not have a schematic. Anyone had experience with
this
> model?
> Jerry Silverman
> Greentron Inc
> 4 Newland Ave
> Greenville SC 29609
> 864 232 3889
> Fax 271 2080
> mailto:greentron@xxxxxxx
>
>
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