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: "LeRoy Westlund" <llw@xxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Date: Fri, 22 Nov 2002 10:27:08 -0700
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.

Thanks,
LLW

LeRoy Westlund
Westlund TV & Electronics          " It's such a pretty world
93 North Main                                          today !....
Centerfield, UT 84622-0087           Look at the Sunshine. "
Ph./Fax  435-528-3822                               :-)
mailto:LLW@xxxxxxxxxx

-----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.


>
>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® #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                                          today !....
>> Centerfield, UT 84622-0087           Look at the Sunshine. "
>> Ph./Fax  435-528-3822                               :-)
>> 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® #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                                          today !....
>> >> Centerfield, UT 84622-0087           Look at the Sunshine. "
>> >> Ph./Fax  435-528-3822                               :-)
>> >> mailto:LLW@xxxxxxxxxx
>> >>
>> >>
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[TechAssist] Re: Philips / Magnavox TS2744C103 Chassis # 27B8 No Video, no OSD, Sound is OK.

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