[TechAssist] Re: Zenith SJ2775 video jitters in VCR mode
- From: "J Silverman" <greentron@xxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Fri, 2 Dec 2005 12:25:10 -0500
Vertical jitter in a picture from a vcr usually means that something is
wrong with the signal coming from the heads at the point where the tape
first contacts the drum. This is easily verified by looking at the RF
envelope with an oscilloscope. If the RF envelope is poor it could be caused
by dirt on the lower drum, dirt keeping the guide post from seating,
incorrect back tension, worn video heads or worn lower drum, locked guide
post roller, misadjusted guide height or angle.
If the RF envelope is good, suspect the pinch roller, dirty or worn control
head, head switching point adjustment.
Jerry Silverman
Greentron Inc
4 Newland Ave
Greenville SC 29609
Fax/Phone 864 232 3889
mail to: greentron@xxxxxxx
----- Original Message -----
From: "Barry" <foxhole@xxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Thursday, December 01, 2005 2:01 PM
Subject: [TechAssist] Zenith SJ2775 video jitters in VCR mode
> In the VCR mode (Video In) after warmup the picture looses stability and
jitters. Has anyone got a fix?
> Barry MacInnes
> Television Service Clinic
> 2 Church St. W.
> W. Lebanon,NH 03784
> foxhole@xxxxxxxxx
>
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