[TechAssist] Re: Proscan ctc169bj5 dead
- From: jbc <jbc@xxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Thu, 24 Jan 2002 13:20:30 -0600
Check Q4702-E for 12V LOC 14BB
If low ck CR4118-K for abt 15V
CR4118 @ Xmfr-3 often fails
Q4705 will work only if the flyback is running. It is powered by th 26V line @
Fly-8
ON/OFF flow is
U3101-38
Q4306
Q4304
Q4301
Q4305-E which supplies 9V to horiz osc - turns high voltage ON
Tomlee wrote:
> Hello Perry.
> I am sorry that I tell something wrong. Actually the tv has good B+ 160v.
> But When I push power button. I see voltage at pin 38 of Microcontrol goes
> up a bit about one volt then goes down. so q4705 never turn on and q4702
> never turn on. So
> it miss source #3 12v. and some sources come from q4703.I do not know it
> is protected or power supply fails by itself.
> thank for help. Dang TVCR
> ----- Original Message -----
> From: "Electric Medic" <info@xxxxxxxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Tuesday, January 22, 2002 9:53 PM
> Subject: [TechAssist] Re: Proscan ctc169bj5 dead
>
> >
> > Check these things:
> > Change C4108 which causes high bias on Q4101 (200165)
> > and its failure. Also replace U4101(200419). Do not sub Chopper or IC.
> Done
> > 100's of these, if you do not replace IC and C4108, the set will recall in
> > most cases. Also change C4118 and C4102 The main thing to check is
> > your B+ in stand by which all of the above caps, if defective, will go as
> > high as 200 volts (it's supposed to be approximately 140 volts)
> >
> > Perry Bower
> > Electric Medic
> > "It's Cheaper to Keep Her"
> > 3850 Washington Road Suite 5b
> > Martinez, Georgia 30907
> > Phone: 706-8MEDIC4 (863-3424)
> > Phone: 706-863-3474
> > Fax: 706-863-2316
> > Website: www.electricmedic.com
> > mailto:info@xxxxxxxxxxxxxxxxx
> > "WE REPAIR WITH CARE"
> > More Info: www.augusta-ga.bbb.org/report.html?compid=6001278&national=y
> >
> > Factory Trained Authorized Service Center For: Fisher, GE, KEC/KTV,
> Konka,
> > Mitsubishi, Panasonic, Philips Magnavox, Pioneer, ProSCAN, RCA, Samsung,
> > Sanyo, Sharp, SONY, Technics, Zenith
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> > Provide Extended care for: AON, Circuit City, GE Contracts, Glass Agency,
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> >
> >
> > -----Original Message-----
> > From: techassist-bounce@xxxxxxxxxxxxx
> > [mailto:techassist-bounce@xxxxxxxxxxxxx]On Behalf Of Tomlee
> > Sent: Tuesday, January 22, 2002 11:20 PM
> > To: techassist@xxxxxxxxxxxxx
> > Subject: [TechAssist] Proscan ctc169bj5 dead
> >
> >
> >
> > Hello techs.
> > I am working with proscan CTC169BJ5. it is dead .Q4101 is not working.
> > suspect ic 4101 fails. Is there any tips for this problem.TIA.I am not
> > familiar with this brand TV.
> > Dang TVCR
> >
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