[TechAssist] Re: Mitsubishi VS-4551 severe side barrell bowing, converg. out sides (VZ2 chassis)
- From: "Shoreline Electronics" <jstielau@xxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Mon, 14 Feb 2005 21:40:32 -0500
I'd look at the geometrical values in service mode. They may be way out of
whack.
On the Remote press Menu 2,3,5,7 to get into service mode.
Pressing the Audio button will cycle thru adjustment modes VCH-MCS-PIP-HR
Look the VCH settings. Select VCH with the Audio button. Then press Video
button to cycle thru the adjustment parameters.
Look at adjustment PAM ( E-W Parabola PCC amp. Adjustable from
0-63......initial value is 32. See if it responds.
To save changes , press Enter.....don't like what you did , terminate this
mode by pressing OFF.
==========================
Jeff Stielau
Shoreline Electronics Repair
344 East Main Street
Clinton,CT 06413
860-399-1861
860-664-3535 (fax)
jstielau@xxxxxxxx
========================
----- Original Message -----
From: "Phil Bader" <tjanphyl@xxxxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Monday, February 14, 2005 4:42 PM
Subject: [TechAssist] Mitsubishi VS-4551 severe side barrell bowing,
converg. out sides (VZ2 chassis)
> Good center convergence that adjusts in "test" mode
> Sides are very bowed like a barrell (opposite of pincushion). with the
> convergence way out.
> Red way out worse on right, Blue out farthest on left. But both sides
> are /really/ bad.
> I read some related Mits tips on this model.Checked transistors
> Q8F04,Q8F06,Q8F02,Q8F03 out of ckt for leakage.All OK. Checked diodes
> D8F00,D8F01 for same out of circuit, all OK. Checked diode D501 same. OK.
> As suggested by Mits.
> As a test, I replaced both convergence ICs, both STK391-020.
> Same.
> I noticed after on some minutes I got a vertical arc-like distortion and
> pull-in from top/bottom. I resoldered all that.earlier, so not bad
> connection. Is this a possibility of bad yokes?
> I need some advice here. I can't locate the svc manual either.
> Phil Bader
>
> --
>
> Philip Bader
> Jan Phyl TV Inc. (estab. 1976)
> 3420 Recker Hwy. Winter Haven, Fl. 33880
> Fax (863) 299-8821
> email: tjanphyl@xxxxxxxxxxxxxxx
>
>
>
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