[TechAssist] Re: ORION TV MDL: TV1329A VERT PROBLEM
- From: "J Silverman" <greentron@xxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Mon, 2 Aug 2004 15:37:06 -0400
IC401 is the booster amplifier type of vertical IC. Pin 6 has 25 volts
derived from the flyback. Pin 5 has a 2.6 volt bias with a sawtooth waveform
on it that comes from the chroma IC. When the tv is in the service mode, the
vertical size is adjusted by changing the amplitude of the sawtooth
waveform. If there is no sawtooth, the chroma IC201 must be defective.
Jerry Silverman
Greentron Inc
4 Newland Ave
Greenville SC 29609
Fax/Phone 864 232 3889
mail to: greentron@xxxxxxx
----- Original Message -----
From: <fremur01@xxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Sunday, August 01, 2004 4:27 PM
Subject: [TechAssist] ORION TV MDL: TV1329A VERT PROBLEM
> Hello,
>
> I am servicing an ORION which I initially thought would
> be a piece of cake.
>
> The unit was recently brought into shop with no vertical sweep.
> I replaced IC401 (LA7840) thinking this would correct the problem
> but to no avail. All adjoining components check okay.
>
> I have no service literature, am seeking case history info on this model.
> Assistance is appreciated.
>
> ORION TV MDL: TV1329A VERT PROBLEM
>
> Thanks,
>
> Fred
> MTS Electronics
> Fayetteville, NC
> fremur01@xxxxxxxxx
>
>
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