Magnavox TS2744C103 Chassis # 27B8 No Video, no OSD, Sound is OK. - techassist / [TechAssist] Re: Philips

[TechAssist] Re: Philips / Magnavox TS2744C103 Chassis # 27B8 No Video, no OSD, Sound is OK.

From: tomy@xxxxxxxxxxxxxxxxxxxxx
To: techassist@xxxxxxxxxxxxx
Date: Fri, 22 Nov 2002 10:48:48 -0800 (PST)
On Fri, 22 Nov 2002, "LeRoy Westlund" wrote:
>I think you still have a vertical deflection problem.
have you looked at the waveforms out of the vertical IC?
>=20
>=20
> Bob,
> I have installed a socket, and with the original
eeprom
> back in set, the
> problem remains. I think it's stricktly a NO video
> problem. Sound is OK.
>=20
> Thanks,
> LLW
>=20
> LeRoy Westlund
> Westlund TV & Electronics          " It's such a
pretty
> world
> 93 North Main=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20
> today !....
> Centerfield, UT 84622-0087           Look at the
> Sunshine. "
> Ph./Fax  435-528-3822=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20
:-)
> mailto:LLW@xxxxxxxxxx
>=20
> -----Original Message-----
> From: Gemini Computer & TV <geminitv@xxxxxxxxxxxxxxxx>
> To: techassist@xxxxxxxxxxxxx
<techassist@xxxxxxxxxxxxx>
> Date: Friday, November 22, 2002 5:00 AM
> Subject: [TechAssist] Re: Philips / Magnavox
TS2744C103
> Chassis # 27B8 No
> Video, no OSD, Sound is OK.
>=20
>=20
> >
> >Leroy,
> >Install the original EEPROM. I have had replacements
> that were blank. I
> >always install a socket so I can remove it in the
> future without
> resoldering
> >it.
> >
> >Bob Waterman, CET=AE #RI-28
> >Master Technician License #9109
> >Service Manager
> >Gemini Computer, TV, & Security Alarms
> >(508)695-7302
> >(508)695-7769 FAX
> >geminitv@xxxxxxxxxxxxxxxx
> >geminitv@xxxxxxx
> >
> >----- Original Message -----
> >From: "LeRoy Westlund" <llw@xxxxxxxxxx>
> >To: <techassist@xxxxxxxxxxxxx>
> >Sent: Thursday, November 21, 2002 9:26 PM
> >Subject: [TechAssist] Re: Philips / Magnavox
> TS2744C103 Chassis # 27B8 No
> >Video, no OSD, Sound is OK.
> >
> >
> >>
> >> Thanks Bob,...but, I have saved that post from last
> time.
> >> Already checked everything suggested. (More then
> once).
> >> I need some NEW suggestions on this one.
> >> I have the factory remote,...but, it won't reset
the
> eeprom.
> >>
> >> Regards,
> >> LLW
> >>
> >> LeRoy Westlund
> >> Westlund TV & Electronics          " It's such a
> pretty world
> >> 93 North Main=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20
=20
>   today !....
> >> Centerfield, UT 84622-0087           Look at the
> Sunshine. "
> >> Ph./Fax  435-528-3822=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20=20
> :-)
> >> mailto:LLW@xxxxxxxxxx
> >>
> >> -----Original Message-----
> >> From: Gemini Computer & TV
> <geminitv@xxxxxxxxxxxxxxxx>
> >> To: techassist@xxxxxxxxxxxxx
> <techassist@xxxxxxxxxxxxx>
> >> Date: Thursday, November 21, 2002 4:22 PM
> >> Subject: [TechAssist] Re: Philips / Magnavox
> TS2744C103 Chassis # 27B8 No
> >> Video, no OSD, Sound is OK.
> >>
> >>
> >> >
> >> >Leroy,
> >> >See if any of these apply:
> >> >
> >> >Symptom:  Dim raster with faint colored bars from
> top to bottom. No
> >> response
> >> >to changes of video, no menu or graphics on the
> screen.
> >> >Cause:  The beams in the CRT are deflected into
the
> CRT neck and scatter
> >at
> >> >random across the screen.  This is caused by
either
> a loss of Minus 13.5
> >> >volts to IC500 (vertical out) or IC500 itself.
> >> >Cure:  Check and replace as needed; R420, D409,
> C419, IC500.
> >> >
> >>
>----------------------------------------------------
> >> >
> >> >Symptom:  High Voltage (EHT) remains but there is
> no:
> >> >OSD - Menu
> >> >Video - Raster
> >> >Sound
> >> >There may be a faint line across the top of the
CRT.
> >> >Cause:  Information in the EEPROM (IC346) is
> incorrect.  This results in
> >> >deadlock of the BIMOS Signal Processor.  Caused in
> one instance when
> >> >Register 66 on Service Page A was adjusted to FF
> and stored.
> >> >Cure:  If in the Service Mode exit by pressing 9,
> then + (volume up).
> >The
> >> >set will shut off.  Power on and enter the Service
> Mode by
> 06-25-95-MENU.
> >> >Press A/CH (Surf).  ROM defaults will be written
to
> the EEPROM and
> normal
> >> >operation will come back.
> >> >Note:  At this point all items in the Service Mode
> will have to adjusted
> >> for
> >> >proper operation.
> >> >
> >> >
> >> >Bob Waterman, CET=AE #RI-28
> >> >Master Technician License #9109
> >> >Service Manager
> >> >Gemini Computer, TV, & Security Alarms
> >> >(508)695-7302
> >> >(508)695-7769 FAX
> >> >geminitv@xxxxxxxxxxxxxxxx
> >> >geminitv@xxxxxxx
> >> >
> >> >
> >> >----- Original Message -----
> >> >From: "LeRoy Westlund" <llw@xxxxxxxxxx>
> >> >To: "TechAssist" <techassist@xxxxxxxxxxxxx>
> >> >Sent: Thursday, November 21, 2002 12:04 PM
> >> >Subject: [TechAssist] Philips / Magnavox
TS2744C103
> Chassis # 27B8 No
> >> Video,
> >> >no OSD, Sound is OK.
> >> >
> >> >
> >> >>
> >> >> Hi members,
> >> >> I have fixed 2 or 3 of these sets for the
> traditional Vertical
> >problems.
> >> >> This one is giving me nightmares.
> >> >>
> >> >> After replacing IC500, D409, and R420, my
> vertical seems to be
> >OK,...but,
> >> >> now I have a dark screen, with NO video or OSD.
> There is a white line
> >> >across
> >> >> the top, about 1/2 inch thick. If I turn up my
> screen control, it goes
> >to
> >> >> gray raster, with retrace lines.
> >> >>
> >> >> I have found about 20 fixes for this problem.
> They all seem to be
> >> >Vertical,
> >> >> or IC500 related. Also,...some have been fixed
by
> replacing the Eprom.
> >> >> I have rechecked my work in the vertical
area.(NO
> lifted traces.).
> >> >> I have replaced the Eprom (NO change), but can't
> access the service
> >menu,
> >> >> due to the NO OSD problem. I have replaced
> IC271.(problem remains).
> >> >> The voltages on IC500 are:
> >> >> Pin # 1 - .4 volts
> >> >>           2 - +12.5
> >> >>           3 -  -10.5
> >> >>           4 -  -12.5
> >> >>           5 -  .2
> >> >>           6 - +13.5
> >> >>           7 -  .4
> >> >> I have also had to replace R58 (20 ohms), and IC
> 52 (TDA6106Q), on the
> >> CRT
> >> >> board.(For shutdown problems).
> >> >> In other words,...This set had multiple
> problems,...but, now,...there
> >is
> >> >> ONLY ONE problem left. Hate to junk it after
> spending so much time and
> >> >money
> >> >> on it,...But,..it is now becoming a matter of
> principal. I will not
> >> >> rest,...until I find, and fix this problem !
> >> >>
> >> >> Any help is appreciated,
> >> >> LLW
> >> >>
> >> >>  LeRoy Westlund
> >> >> Westlund TV & Electronics          " It's such a
> pretty world
> >> >> 93 North Main=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20
=20
>      today !....
> >> >> Centerfield, UT 84622-0087           Look at the
> Sunshine. "
> >> >> Ph./Fax  435-528-3822=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20
=20
>   :-)
> >> >> mailto:LLW@xxxxxxxxxx
> >> >>
> >> >>
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>=20
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[TechAssist] Re: Philips / Magnavox TS2744C103 Chassis # 27B8 No Video, no OSD, Sound is OK.

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