[TechAssist] Re: Philips / Magnavox TS2744C103 Chassis # 27B8 No Video, noOSD, Sound is OK.
- From: "Peter oliver" <oliver_peter1@xxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Thu, 21 Nov 2002 19:40:32 +0000
Check The CRT board There is occasion when A resitor burns out it is usually
visiable if examined closely that can throw the CRT bias off on these and
since their is a feed back to the chassis it can interrelate some problems.
I had a B800 chassis (virtually the same animal as yours) that had eratic
screen control that had a burned out 1/8w ~2K resistor (I think) on the
lower right side of the crt board (componet side) it fed the driver chips on
the crt board.
Peter Oliver
Tucson Radio TV
From: "LeRoy Westlund" <llw@xxxxxxxxxx>
Reply-To: techassist@xxxxxxxxxxxxx
To: <techassist@xxxxxxxxxxxxx>
Subject: [TechAssist] Re: Philips / Magnavox TS2744C103 Chassis # 27B8 No
Video, no OSD, Sound is OK.
Date: Thu, 21 Nov 2002 12:09:07 -0700
Lynn,
Thanks for your response.
I have removed EEPROM (No change).
I grounded pin # 6 of EEPROM.(No change).
I replaced EEPROM 2 times.(No change).
CRT, and Yoke are OK.
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: Lynn C. Hedspeth, CET(r) <HedTV@xxxxxxxxxxxxx>
To: techassist@xxxxxxxxxxxxx <techassist@xxxxxxxxxxxxx>
Date: Thursday, November 21, 2002 11:35 AM
Subject: [TechAssist] Re: Philips / Magnavox TS2744C103 Chassis # 27B8 No
Video, no OSD, Sound is OK.
>
>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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