[TechAssist] Re: Panasonic CT27G20T chassis AEDP246 series NA3D No Vertical
- From: "John @ Myers TV" <myerstv@xxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Thu, 23 Oct 2003 12:11:05 -0400
This is a Long shot; One of my worst vertical problems was the rosin on the
board. Onece we cleaned the board, the problem dissapeared.
Go Figure
John Myers
Myers TV Service Co. Since 1984
Alliance, OH
Voice: 330-821-6545
myerstv@xxxxxxxx
http://members.ebay.com/aboutme/tvguy07/
http://members.ebay.com/aboutme/threads_r_us/
----- Original Message -----
From: <tvservice@xxxxxxxxxxxxx>
To: "Tech-Assist" <techassist@xxxxxxxxxxxxx>
Sent: October 23, 2003 10:51 AM
Subject: [TechAssist] Panasonic CT27G20T chassis AEDP246 series NA3D No
Vertical
> OK Group
> Please tell me what I am NOT doing
> This set came from another shop with no vertical deflection
> Have relaced...
> IC451 LA7836
> D451 NTE552
> D557 5.1 volt zener
> D545 12 volt zener
> C451 220mfd
> C455 100mfd
> C457 .1mfd
> C453 2.2mfd
> C452 1mfd
> All resistors are within tolerance. IC451 voltages are...
> Pin 1 +12.3 volt VCC1
> Pin 2 4.4 volt with .3v 5ms input should be 4.4v (suspect low caused
by
> IC not working) or maybe IC101 jungle bad??
> Pin 3 6 volt (size)
> Pin 4 gnd
> Pin 5 11 volt schem says 6 volt (ramp gen)
> Pin 6 .3 volt schem says 6.5 v (drive/feedback)
> Pin 7 +26 volt VCC2
> Pin 8 0 schem says 2.6 v (pump up)
> Pin 9 n/c 2.7v
> Pin10 gnd
> Pin11 .5 volt schem says 15.4 v (output)
> Pin12 26 volt
> Pin13 5.1 volt
> Have also subbed yoke
> still no Vertical deflection
>
> Please any advice appreciated
>
> Robert
> tvservice@xxxxxxxxxxxxx
> H & H Electronics Inc
> Dallas, TX
>
>
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