[TechAssist] Re: Broksonic CTSGT-8118CTT power problem

Hi Jerry check this   Eric
ctsgt8118 
                                    no hv. power led
                                    lights 
                                                     icp503 (5A) open
D519
                                                     (21dq09/nte579)
shorte
Eric Manuel
Deer Lake Nfld
Canada


J Silverman wrote:
> 
> 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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