[TechAssist] Re: RCA TV - F25652BL - CTC187AB - Won't Turn ON - FOLLOWUP
- From: "becyn" <becyn@xxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Wed, 28 Jul 2004 18:03:09 -0400
You may have leaky or stuck switches. Check that you have greater than 4.75
V on each fp switch. If not, the switch or bybass caps in the mux lines(s)
may be defective, This is true for any similar control system.
Jim McVey
McVey Alltronix
327 Broadway
Newburgh N.Y. 12550
Factory authorized
service for over 20
major brands.
845 561 8383
----- Original Message -----
From: "David Lessard" <mr_fixit@xxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Wednesday, July 28, 2004 12:49 PM
Subject: [TechAssist] Re: RCA TV - F25652BL - CTC187AB - Won't Turn ON -
FOLLOWUP
> FOLLOWUP
>
> OK, just got back to this dog today.
>
> I have (5V) data activity on pins 5 and 6 of EPROM. Data is always
> active, it never stops after AC plug-in, and this may indicate a bad
> EPROM. Also I'm not too sure about U3101-5 (KD1 pin), schematic says
> voltage should be 0V; I'm reading 5V off the pin (disconnected from the
> PCB). I can see how the panel button matrix works for CH UP, CH DN and
> MENU but I can't make sense of POWER, VOL UP and VOL DN. How does
> U3101-5 (KD1 pin) work for those buttons that don't seem to work?
> Perhaps I have two problems here.
>
> Looking for input on this as I've never done a system control problem
> before.
>
> Thanks techs,
>
> David Lessard
> Alexandria, Ontario. Canada
> mr_fixit@xxxxxxxxxxxx
>
> -----Original Message-----
> From: techassist-bounce@xxxxxxxxxxxxx
> [mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of tvservice
> Sent: Wednesday, July 21, 2004 8:46 PM
> To: techassist@xxxxxxxxxxxxx
> Subject: [TechAssist] Re: RCA TV - F25652BL - CTC187AB - Won't Turn ON
>
> look for +5 volts on pins 5 and 6 of eeprom if not there or low, replace
> it
> if ok at pin 8. If +5 ok all pins look for data momentarily on pin 5
> while
> applying ac power
> Robert
> tvservice@xxxxxxxxxxxxx
> H & H Electronics Inc
>
> ----- Original Message -----
> From: "David Lessard" <mr_fixit@xxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Wednesday, July 21, 2004 8:52 AM
> Subject: [TechAssist] RCA TV - F25652BL - CTC187AB - Won't Turn ON
>
>
> > Hey Gang,
> >
> >
> > I need a troubleshooting chart for this TV, a schematic would also be
> > appreciated, any tips out there? Fuse and HOT good, SMPS fires up when
> > TV is plugged in. I use to have lots of information on the CTC187
> before
> > my other computer crashed. What did I learn, back things up on to CD!
> >
> >
> >
> > Thanks,
> >
> >
> >
> > David Lessard
> >
> > Alexandria, Ontario. Canada
> >
> > mr_fixit@xxxxxxxxxxxx
> >
> >
> >
> >
> >
> >
> >
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