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

  • From: "Lynn C. Hedspeth, CET(r)" <HedTV@xxxxxxxxxxxxx>
  • To: techassist@xxxxxxxxxxxxx
  • Date: Thu, 21 Nov 2002 13:27:17 -0500


Most likely replace EEPROM.
Pull the old EEPROM and power back up. 
If EEPROM is defective the picture will be back up.
Won't remember any of your setting, but you will be
able to tell before you order.

****************************************
Lynn C. Hedspeth, CET(r) NC-407
Hedspeth Enterprises Inc.
3521 E. Hwy 27
Lincolnton, NC  28092-7659
704-735-3532
413-828-0216 (fax)
HedTV@xxxxxxxxxxxxx
***************************************

*********** REPLY SEPARATOR ***********

On 11/21/02, at 10:04 AM, LeRoy Westlund wrote: 

>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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