[TechAssist] Re: Philips TS2744C103 chassis 27B8 Micro-p problem.
- From: "LeRoy Westlund" <llw@xxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Wed, 26 Mar 2003 14:55:15 -0700
I guess I could put the old one back in,..but, you know how these philips
printed ckts. are. You only have ONE chance to replace a large IC like that
one, before you damage the trace. I'm sure it's the right part number. I
double checked it. Also, it's facing the right direction. Pin # 1 is lined
up properly.
Regards,
LLW
LeRoy Westlund
Westlund TV & Electronics " Walk tall,...Walk straight
93 North Main and look the world
Centerfield, UT 84622-0087 right in the eye "
Ph./Fax 435-528-3822
mailto:LLW@xxxxxxxxxx
-----Original Message-----
From: Gemini Computer & TV <geminitv@xxxxxxxxxxxxxxxx>
To: techassist@xxxxxxxxxxxxx <techassist@xxxxxxxxxxxxx>
Date: Wednesday, March 26, 2003 2:48 PM
Subject: [TechAssist] Re: Philips TS2744C103 chassis 27B8 Micro-p problem.
>
>Well in that case, it is probably one of three things. Either you have a
new
>defective micro, the wrong replacement micro, or it is not installed
>properly. Can you reinstall the original micro and see if it is still dead?
>
>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
>www.geminicomputertvsecurityalarms.com
>
>----- Original Message -----
>From: "LeRoy Westlund" <llw@xxxxxxxxxx>
>To: <techassist@xxxxxxxxxxxxx>
>Sent: Wednesday, March 26, 2003 4:39 PM
>Subject: [TechAssist] Re: Philips TS2744C103 chassis 27B8 Micro-p problem.
>
>
>>
>> No, Bob. I have all these fixes, already.
>> My set is "dead" at the present time, and you have to be able to at least
>> turn it on, before performing some of these proceedures. It turned on
>> "before" I changed the micro-p.
>> I would give up on this one,...but, it has become a life long dream of
>mine
>> to fix it.
>> The set belongs to me now, so it has become a matter of principle,
instead
>> of profit.
>>
>> Regards,
>> LLW
>>
>> LeRoy Westlund
>> Westlund TV & Electronics " Walk tall,...Walk straight
>> 93 North Main and look the world
>> Centerfield, UT 84622-0087 right in the eye "
>> Ph./Fax 435-528-3822
>> mailto:LLW@xxxxxxxxxx
>>
>> -----Original Message-----
>> From: Gemini Computer & TV <geminitv@xxxxxxxxxxxxxxxx>
>> To: techassist@xxxxxxxxxxxxx <techassist@xxxxxxxxxxxxx>
>> Date: Wednesday, March 26, 2003 2:09 PM
>> Subject: [TechAssist] Re: Philips TS2744C103 chassis 27B8 Micro-p
problem.
>>
>>
>> >
>> >Perhaps this may have been it:
>> >
>> >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.
>> >----------------------------------
>> >Symptom: There may be no raster, no video (slick raster) or only the top
>> >half of the raster.
>> >
>> >Cause: Corrupted value in EEPROM memory, IC346, register 67
>> >
>> >Cure: TO AVOID CHANGING ALL MEMORY LOCATIONS:
>> >
>> >1. With set unplugged from AC ground pin 6 of memory IC (IC346).
>> >
>> >2. Power set and turn on. Video and/or raster should be restored.
>> >
>> >3. Enter Service Mode, first page.
>> >
>> >4. With cursor up/down select register 67.
>> >
>> >5. With right/left cursor set value to 1D.
>> >
>> >6. While on remove ground from pin 6 of IC346.
>> >
>> >7. Press MENU to save. Press 9, press cursor right, set will turn off.
>> >
>> >8. Break AC power for 10 seconds to insure value is saved.
>> >
>> >9. Restore AC power and check operation.
>> >
>> >If full video is restored in step 2 but readjustment of register 67 does
>> not
>> >resolve the problem do the following:
>> >
>> >A. Perform steps #1, #2 and #3 above.
>> >
>> >B. While in the Service Mode record all displayed values in pages B
>through
>> >H.
>> >
>> >C. Return to page A (press 1) & press A/CH on remote to write defaults
>from
>> >the micro-P to the memory IC.
>> >
>> >D. Complete steps 7, 8 and 9 above.
>> >
>> >E. Turn on set, enter Service Mode and reset pages B through H to the
>> >recorded values in Step B.
>> >
>> >----------------------------------------------------------------
>> >
>> >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
>> >www.geminicomputertvsecurityalarms.com
>> >
>> >----- Original Message -----
>> >From: "LeRoy Westlund" <llw@xxxxxxxxxx>
>> >To: "TechAssist" <techassist@xxxxxxxxxxxxx>
>> >Sent: Wednesday, March 26, 2003 3:45 PM
>> >Subject: [TechAssist] Philips TS2744C103 chassis 27B8 Micro-p problem.
>> >
>> >
>> >>
>> >> Hi,
>> >> I have had multiple problems with this set. I repaired the typical
>> >vertical
>> >> problem, plus the typical problems associated with the CRT board, etc.
>> >> I had everything working, except still NO video. I replaced the EPROM
>> with
>> >> no help, and as a last resort, I decided to change the micro-p.
>> >> My new problem: After replacing the micro-p, I can't get the set to
>even
>> >> turn on. I did a nice clean solder job, and checked my
>> >> work,...but,....NOTHING.
>> >> I remember seeing a post a while back, that had this same symptom, and
>a
>> >> fix,..but, I can't find it. I thought I had saved it.
>> >> Can anyone help me with this problem ?
>> >>
>> >> Thanks for your time,
>> >> LLW
>> >>
>> >> LeRoy Westlund
>> >> Westlund TV & Electronics " Walk tall,...Walk straight
>> >> 93 North Main and look the world
>> >> Centerfield, UT 84622-0087 right in the eye "
>> >> Ph./Fax 435-528-3822
>> >> mailto:LLW@xxxxxxxxxx
>> >>
>> >>
>> >>
>>
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