[TechAssist] Re: pt-51g36ce convergence problem
- From: D Trippel <dtrippel@xxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Thu, 29 Dec 2005 10:23:40 -0800
Hello!
Thanks for the info. Well the set came in and it has more problems . The
picture is seriously bowed in top and bottom. So I assume there is a
problem with the pin cushion circuit as well as the convergence. Ic 7102
had been replaced by another shop and they did a horrible soldering job
(traces damaged) They replaced it with the original not the tvr2aj142s
so the same problem may have reoccurred. Does the eprom ic7102 have pin
correction info in it as well? I would really appreciate some advice
on this one. Thanks!
Don
>here is the bulletin from Panasonic:
>Subject: Convergence EEPROM change due to a data lost problem Affected
>Models: PT-51G36E, PT-51D31E/VE/XE, PT-61D31E/VE/XE, PT-M5131VE (Affected
>Chassis) P6 Symptoms: Sudden loss of convergence adjustments data, when unit
>is turned on. Instructions: Replace the following components: Remove the
>original convergence EEPROM (IC7102)#24LC64TI-SN from X board. (Make sure
>to unsolder the pins completely before removing. Incomplete desoldering will
>cause the copper foil to peel off.)
>Check the configuration of EEPROM before place it on the X board.
>For models PT-51D31C, PT-M5131VE/XE and PT-51G36E/CE replace the IC7102 with
>#TVR2AJ142S
>For models PT=31D31CE/VE/XE replace the IC7102 with TVR2AJ143S
> procced to adjust the unit. (Follow the Service Manual adjustment
>instructions)
>Reasons: The original EEPROM 24LC64TI-SN is able write data any time, it
>does not have write protection function.
>New EEPROM has "write protection" function. When pin 7 is set High (with
>R7156) it will "write protect" making it unable to modify the data.
>This function will keep EEPROM unable to write, unless, it is in convergence
>adjustment mode. This will prevent unwanted EEPROM data change or lost.
>
>Average adjustment time about 2 hours
>
>Robert
>tvservice@xxxxxxxxxxxxx
>H & H Electronics Inc
>http://supertek.igniteinc.biz
>
>
>----- Original Message -----
>From: "Electric Medic" <info@xxxxxxxxxxxxxxxxx>
>To: <techassist@xxxxxxxxxxxxx>
>Sent: Tuesday, December 27, 2005 8:46 PM
>Subject: [TechAssist] Re: pt-51g36ce convergence problem
>
>
>
>
>>Have not ever seen or heard of a bad EPROM on a Panasonic PTV for poor
>>convergence. Usually always bad amps and/or open resistors. Tell us more
>>about this ic 7102. I would love to hear if others have had this to be a
>>common failure for convergence.
>>
>>Perry Bower
>>Electric Medic
>>"It's Cheaper to Keep Her"
>>http://www.electricmedic.com
>>"We're Number One Where it Really Counts, With our Customers"
>>3850 Washington Road Suite 4C
>>Augusta, Georgia 30907
>>Phone: 706-8MEDIC4 (863-3424)
>>Phone: 706-863-3474
>>Fax: 706-863-2316
>>mailto:info@xxxxxxxxxxxxxxxxx
>>"WE REPAIR WITH CARE"
>>
>>
>>
>>-----Original Message-----
>>From: techassist-bounce@xxxxxxxxxxxxx
>>[mailto:techassist-bounce@xxxxxxxxxxxxx]On Behalf Of D Trippel
>>Sent: Tuesday, December 27, 2005 7:12 PM
>>To: techassist@xxxxxxxxxxxxx
>>Subject: [TechAssist] pt-51g36ce convergence problem
>>
>>
>>Hello Everyone!
>>
>>A customer called with a pt-51g36ce with poor convergence. I have heard
>>ic 7102 the eprom has been a problem with this set.Does the new eprom
>>come pre-programed? The reason I am asking is that I have a fairly
>>small shop and I would rather not have a big monster set taking up room
>>for too long. Have any off you guys had experience with this set. Do I
>>have hours of fun ahead of me resetting the convergence after eprom
>>replacement. Any help would be appreciated. Thanks!
>>
>>Don Trippel
>>Don's Electronics
>>Rothern,Sask
>>Canada
>>
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