[TechAssist] [ FIXED] Zenith PVR4660VK Pix is bowed equally on top, bottom, and sides, and convergence is bad.
- From: "LeRoy Westlund" <llw@xxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Fri, 23 Apr 2004 22:35:13 -0600
Thanks to all for the helpful responses on this problem.
Doing a complete convergence alignment on this set, fixed the problem.
The key was to adjust the Vertical and Horz size pots on the sweep module by
using the green CRT only, before starting the more triditional convergence
proceedure. Once you have a good, straight looking cross hatch pattern for
the green, it is much easier to go ahead and converge the Red, and the Blue
to the established green pattern. You have to adjust for a 3 : 4 display on
your cross hatch generator. ( 3 vertical squares for every 4 horzontal
squares ). The actual number of Vert & Horz squares for each signal
generator will vary. You need for this example, to set vertical size for 12
squares and horzontal for 16 squares. This will give you the 3 : 4 display.
There will be some overscan of the displayed sweep. Once you set the main
size pots, check a channel that has graphics at the bottom or top and make
sure it is not being clipped off. ( I used the Guide menu from a DishNetwork
receiver ). Setting of the Horz, and Vert size will effect the edge, and
corner convergence.
Hope this helps someone, who may run into one of these units that is so far
out of convergence, that you feel you are wasting your time trying. I hope I
never see one of these again, cause I turned controls til my fingers were
sore, and then finished up with a hex tool.
;-)
LLW
LeRoy Westlund
Westlund TV & Electronics
97 North Main "Where there's a will,...
Centerfield, UT 84622-0087 There's always a way."
Ph./Fax 435-528-3822
mailto:LLW@xxxxxxxxxx
-----Original Message-----
From: al m <ampm@xxxxxxx>
To: techassist@xxxxxxxxxxxxx <techassist@xxxxxxxxxxxxx>
Date: Thursday, April 22, 2004 6:57 AM
Subject: [TechAssist] Re: [ Update] Zenith PVR4660VK Pix is bowed equally on
top, bottom, and sides, and convergence is bad.
>LeRoy I think I remember a problem like that. Try moving the vertical and
>horizontal size pots on the sweep board. I had one that was all whacked out
>and adjusting the size of the picture fixed the problem it was stretched to
>much . Also make sure you have the box in all the way or you'll never get
it
>right, happened to me. Couldn't figure out what was going on so I checked
>the box and it wasn't in all the way.
>Al Marquardt
>ampm@xxxxxxx
>Al Marquardt Electronic Repair
>206 W Main
>Girardville Pa. 17935
>----- Original Message -----
>From: "Intrepid Video Support" <support@xxxxxxxxxxxxxxxxxx>
>To: <techassist@xxxxxxxxxxxxx>
>Sent: Thursday, April 22, 2004 8:42 AM
>Subject: [TechAssist] Re: [ Update] Zenith PVR4660VK Pix is bowed equally
on
>top, bottom, and sides, and convergence is bad.
>
>
>> LeRoy,
>> Is it still bowed?
>> Is it possible the ring magnets got bumped?
>> Also, be sure you have the connector plugged into the correct plug. It
>goes to the large signal board with
>> all the large cans on it. n some of these, there is another connector it
>will fit into and could be your
>> problem.
>> Did you check the 110k and 82k resistors...change no matter how they
test.
>>
>> Jeff
>> --
>> Intrepid Video TV/VCR Repair
>> 263 S Front St, Steelton PA 17113
>> 717-939-7708; (F) 717-564-4952
>> www.intrepid-video.com www.tech-repair.net
>> ----- Original Message -----
>> From: "LeRoy Westlund" <llw@xxxxxxxxxx>
>> To: "TechAssist" <techassist@xxxxxxxxxxxxx>
>> Sent: Thursday, April 22, 2004 1:18 AM
>> Subject: [TechAssist] [ Update] Zenith PVR4660VK Pix is bowed equally on
>top, bottom, and sides, and
>> convergence is bad.
>>
>>
>> Hi Avery, and All;
>> Mine is using 3 of the STK391-020 on the Convergence Amp module.
>> I replaced them, and NO help. All the 1 ohm resistors are OK.
>> All my + and - voltages (+26, -26, and + 16) to both the output board,
and
>> the registration board are all present. The 110K and the 82K ohm
resistors
>> (R3243, and R3244) on the SMPS board are also OK.
>>
>> I been trying to do a complete convergence alignment, but it's starting
to
>> drive me crazy. All the controls on the registration board seem to work
>> normal, but, I'll be damned if I can swing them all into place. I am
>usually
>> pretty good at performimg dynamic convergence, but,...not this time, so
>> there may still be a bad componant somewhere. I even tried centering all
>the
>> controls, and starting over again. I can get it fairly close, but not
>close
>> enough to be anywhere near acceptable.
>>
>>
>> One more clue: When I adjust any ( Red, Green, or Blue) of the G-2 screen
>> controls, the vertical retrace line near the bottom of the screen has a
>> nasty 1/2 inch glitch in it. Might have something to do with the problem,
>> but I'm not sure where to look. Maybe a bad e-cap somewhere.
>>
>> Thanks, anyway,
>> LLW
>>
>> LeRoy Westlund
>> Westlund TV & Electronics
>> 97 North Main "Where there's a will,...
>> Centerfield, UT 84622-0087 There's always a way."
>> Ph./Fax 435-528-3822
>> mailto:LLW@xxxxxxxxxx
>>
>> -----Original Message-----
>> From: Avery Boyd <adBoyd@xxxxxxxxxxxxx>
>> To: techassist@xxxxxxxxxxxxx <techassist@xxxxxxxxxxxxx>
>> Date: Wednesday, April 21, 2004 7:05 AM
>> Subject: [TechAssist] Re: Zenith PVR4660VK Pix is bowed equally on top,
>> bottom, and sides, and convergence is bad.
>>
>>
>> >If the convergence board is using stk392-110 replace them along with the
>> >1ohm resistors.
>> >Avery Boyd
>> >4666B S. Mingo
>> >Tulsa OK 74146
>> >Phone 918-665-2400
>> >----- Original Message -----
>> >From: "LeRoy Westlund" <llw@xxxxxxxxxx>
>> >To: "TechAssist" <techassist@xxxxxxxxxxxxx>
>> >Sent: Tuesday, April 20, 2004 10:46 PM
>> >Subject: [TechAssist] Zenith PVR4660VK Pix is bowed equally on top,
>bottom,
>> >and sides, and convergence is bad.
>> >
>> >
>> >Hi members,
>> >I repaired my focus problems by replacing the Focus block. I still have
>bad
>> >convergence, and the pix is bowed equally on top, bottom, and both
sides.
>> >Does anybody have a fix listed for this problem ?
>> >I don't want to buy convergence amps, cause I'm pretty sure it won't fix
>> the
>> >problem.
>> >I'll buy some if you guys think I need them.
>> >Can't afford to waste money buying parts that won't help. So far,..so
>> >good,...but,..I need a quck fix,...bad !
>> >
>> >Any help is appreciated,
>> >LLW
>> >
>> >LeRoy Westlund
>> >Westlund TV & Electronics
>> >97 North Main "Where there's a will,...
>> >Centerfield, UT 84622-0087 There's always a way."
>> >Ph./Fax 435-528-3822
>> >mailto:LLW@xxxxxxxxxx
>> >
>> >
>> >
>>
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