[TechAssist] Re: pt-51g36ce convergence problem
- From: "Damon" <DamonEB@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Thu, 29 Dec 2005 19:43:37 -0500
Anytime you deal with the top and bottom bowed.....you're dealing with the
convergence.
Very rarely do you find pincushion in any direction being caused by a horiz
pincushion circuit anymore, and if you do, (like the RCA 169 Ptv chassis) it
will bow the left/right side, not top/bottom.
Damon B
Telrad Electronics
Fort Wayne IN
----- Original Message -----
From: "D Trippel" <dtrippel@xxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Thursday, December 29, 2005 1:23 PM
Subject: [TechAssist] Re: pt-51g36ce convergence problem
> 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 had been replaced by another shop and they did a horrible soldering job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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