[TechAssist] Re: update2. RCA F36444, ATC113CA1 dead. standby B+ OK no pwr on]
- From: "tvservice" <tvservice@xxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Thu, 16 Jun 2005 15:01:25 -0500
Replace the Gemstar module
straight forward usually no or minor menu adjustments
chipper check not needed
Robert
tvservice@xxxxxxxxxxxxx
H & H Electronics Inc
----- Original Message -----
From: "Phil Bader" <tjanphyl@xxxxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Thursday, June 16, 2005 10:43 AM
Subject: [TechAssist] update2. RCA F36444, ATC113CA1 dead. standby B+ OK no
pwr on]
> Interesting developement:
> I found a small 9 V regulator that did not have output: IV02.
> I clipped my 9 volt bench supply to it and the set immediately powered
> up. I heard high voltage and vertical running with black screen. I
> remembered I installed a new fly, so I increased the G2 screen on it to
> see a dim raster with no video, very narrow (6" each side), and about
> 20KV anode volts to CRT.
> I realise this 9V regulator is fed by transistir TP340 which is biased
> by TP531, who's base drive comes directly from the Gemstar module, but
> think I have other isseis here?
> I am "jury-rigging" it into coming on, but what do you think?
> (especially the low HV@ 20KV?)
> Phil Bader
>
>
> Made sure the smps was up and OK. Replaced the Flyback, eeprom, HOT.
> Resoldered the coils aroind the HOT.
> Went to the Gemstar troubleshooting.
> Checked ribbon cable BR104-pin 14 for +5.2 volts. It was there OK.
> Next, check BR103-pins 10 and 12 (clock and data) for +5.0 VDC and 5VPP
> signal.
> I have neither.
> Also said check BR104- pin 12 and 13 for signal when power is pushed.
> Niether has signal.
> Either omission I have is indication the manual says "replace gemstar"
> So, replacing the gemstar is easy but does this cause other
> complications (like alignments,etc when you replace an eeprom)?
> My first Gemstar...
> Phil
>
>
> Plugged in,I have +139 VDC at collector of HOT in standby. I have +5VDC
> at I/R detector. Either pushing power button, or with remote, no
> response. HOT good, smps seems OK.
> Resoldered LL04 coil to HOT base (like the CTC203), resoldered fly and H
> drive transformer.
> Not a peep when power pushed. Not the "three strikes" chirps. Nothing.
> Phil Bader
>
> --
>
> Philip Bader
> Jan Phyl TV Inc. (estab. 1976)
> 3420 Recker Hwy. Winter Haven, Fl. 33880
> Fax (863) 299-8821
> email: tjanphyl@xxxxxxxxxxxxxxx
>
>
>
>
>
>
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>
>
>
> --
>
> Philip Bader
> Jan Phyl TV Inc. (estab. 1976)
> 3420 Recker Hwy. Winter Haven, Fl. 33880
> Fax (863) 299-8821
> email: tjanphyl@xxxxxxxxxxxxxxx
>
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