Question about JVC AV-48WP30 48" Rear Projection Television

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Picture has changed

I have a JVC AV48WP30 this is the model # the picture looks like the faces have 2 sets of eyes. and the letter are the same. like a shadow. I have tried everything on the menu to try to fix the problem. the color is also weird.some one told me it might be a color Lazar what ever that is. any help would be appreciated. would I be able to fix myself?? Thank You

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Posted on Apr 27, 2008

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  • JVC Master
  • 8,617 Answers

Yes its an easy repair. You need to replace both STK392-110 ICs which are located on the small board right behind the speaker grill and access panel in the front . You can get new Convergence ICs at the following link and they provide free installation instructions with pictures plus free on line tech support when you do the actual repair which takes about 45 minutes. you will need to order (2) STK392-110 ICs.
http://servicemanuals.vstore.ca/

Posted on Apr 27, 2008

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Hooked up an apple tv (for netflix) to our jvc i-art 48" projection tv directly through an hdmi cable and a HDMI - DVI converter jack on the back of the tv. Fantastic picture quality but no matter...


Depending on your model number but most of the AV48WP30 and 74 series have a built in safety feature which has been known to wipe out digital inputs if the rear cover has ever been removed without disabling that feature with a paper clip first. What is the actual model number of your set?

Jun 01, 2011 | JVC Projection Televisions

1 Answer

Av48wp30 picture is not working. crazy lines all through it with no picture or bowing in an hourglass shape. Could turn off and turn back on after a few minutes but now will not come back.


Projection TV sets have two very common problems. One is convergence ( 3D/Warped video) the other is CRT fluid ( Dull Video). Here are more details and solutions for both. Repair kits with instructions are also avail from www.TvRepairKits.com

Common Problem #1) Convergence has gone out

Projection TV sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the video to look normal. When its out of alignment the video will look 3D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the TV menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired.

This is a very common failure on these projection sets and a fairly simple DIY fix. All projection sets including Samsung, RCA, Sony, Philip Magnavox, Panasonic, Pioneer, Akai, GE, JVC, Toshiba, and others at some point will have the same problem.

Common Symptoms include....

  • Screen looks 3D
  • Colors don't line up
  • One or more colors can't be adjusted when using the convergence menu.
  • Screen is bowed or warped.
  • TV shuts off after powering on. Power light will blink. TV may also make a chirping noise.
Here are some pics of convergence problems.


7859b01.jpg

e87380c.jpg
69189a5.pngSOLUTION #1

For more more examples and find a fix using this link on Fixya http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Common Problem #2) CRT Fluid is Cloudy

Projection TV tubes have a liquid coolant that is used to keep them from overheating. After many years the coolant in the blue and green tubes will become cloudy and cause the screen to look dull, red/orange, etc. You may even see halos around images.

Picture of a set that needs the fluid changed.

578ba6c.jpg
TV set after fluid change

65af323.jpg

69189a5.pngSOLUTION

You can see some more examples and find a fix using this link on Fixya http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Apr 21, 2011 | JVC AV-48WP30 48" Rear Projection...

1 Answer

JVC av48wp30 question... I just replaced the STK 392 110s in my tv. I don't know what I did, however when I push the power button the tv clicks, as if wanting to turn itself on...but no picture or sound....


hello. 1/ did you go into service menu and mess with any settings before you changed the ic, if so this will cause the tv not to switch on 2/ did you test the resistors in front of the ic and the capacitors at either end. also there may be some protection fuses on the board that may have shorted i'll see if i can get service manual for you try get this tv back up and running thanks

regards
shaun

Nov 28, 2010 | JVC Projection Televisions

1 Answer

JVC AV48WP30 Projection TV..Half picture distorted and flickering


Ur convergence is dead.Must replaced the 2 convergence ICS and all it resistors.The shop will cost U $300 for parts and parts.

Feb 10, 2010 | JVC AV-48WP30 48" Rear Projection...

1 Answer

I have jvc av-56wp30 all of a sudden the red in the picture is doubled. any ideas what that could be?


That sounds like a convergence failure. The AV48WP30 convergence repair kit from www.tvrepairworld.com should solve the issue. The kit contains the components and the CD with instructions.

Dec 14, 2009 | JVC AV-56WP30 56" Rear Projection...

1 Answer

Model# AV48WP30 Picture show double vision. Colors cant be adjus


you need to replace the convergence ICs and associated resistors you can get the repair kit at the following link for your model which contains the two ICs and all the feed resistors plus step by step instructions with detailed photos how to do the repair. Heres the link to the kit for your model.
http://servicemanuals.vstore.ca/product_info.php/pName/av48wp30-convergence-repair-kit/cName/convergence-repair-kits

Mar 05, 2009 | JVC AV-48WP30 48" Rear Projection...

1 Answer

Double picture


These sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the picture to look normal. This is called convergence.

When its out of alignment the video will look 3-D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired. Convergence problems are very common on all Projection TV sets including Sony, Samsung,JVC,Philip Magnavox,Panasonic,Akai,Pioneer, Hitachi,Mitsubishi,Zenith and others.
You can get more information and a DIY convergenece repair kit with instructions from the link below.

Here are some of the most common problems with these sets...

Problem #1) Convergence

Yours may have one or more of the following symptoms...

*Screen Looks 3-D
*Colors wont align
*Screen may look distorted or warped
*No Audio/Video - TV Shuts down - May also make a constant chirping sound

Problem #2 - Another common problem is dull or washed out video.

Your set may have one or more of the following symptoms....

*Dull looking picture
*White looking picture
*Halos around objects
*Red/Orange looking picture

bb0cf99.pngYou can see some more examples and find a fix using this link on Fixya http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Aug 31, 2008 | JVC AV-48WP74 48" Rear Projection...

1 Answer

Jvc projection tv


it will still be the lamp ,it took a spark its been damaged it will cause all the lines in the tv it has nothing to do with the circuit board

Jul 05, 2008 | Projection Televisions

1 Answer

JVC LT-32DY8ZJ FUZZY PICTURE


Fixed my problem, took it back, got refund and bought a different telly !

Feb 29, 2008 | JVC Projection Televisions

2 Answers

Popping noises and no picture or sound


try replacing the stk's on the deflection board (making sure that all of the resistors on the board are OK and that there are no solder cracks I found one of the jumpers had a bad solder joint on the one I worked on) but if that doesn't fix I have some raw research that might give you somewhere to start :
No. The CRT driver ICs are prone to shorting and cause this symptom (I just had one with those very symptoms and the green CRT driver IC was shorted). Disconnecting the CRT board does not clear the short on the board. Often then is a small burn mark on the CRT board under the affected IC (but not always). The IC should be a TDA6111Q. Be sure to note the proper position
of the IC as it should face with the letters TOWARD the heat sink!!!!

Larry, Check the CRT driver ICs on each of the CRT boards.
Bob Waterman, CET® #RI-28
Master Technician License #9109
Service Manager / Parts Manager
Gemini Computer, TV, & Security Alarms
(508)695-7302
(508)695-7769 FAX
geminitv@xxxxxxxxxxx
Hi Guys, I don`t see many JVC`s and don`t have the print for this AV48WP30, went out this morning and as customer claimed on phone when you plug set in and turn on it makes a loud thump thump in both speakers 20-30 times then relay clicks, the thump stops, and blue idiot light on front goes dim/bright, dim/bright, have to unplug set to start this same scenario over again. Never develops HV or audio, Will order the service manual today, but would like to know if anyone has seen this before (should say "heard" this before)
I would disconnect each crt board and hv lead one at a time and try. Have seen several bad tubes on that model. The only other problem I have seen on that set is bad convergence amps, however that doesn't cause shutdown.
Perry Bower
Electric Medic
From Tech Repair CD:
JVC\AV48WP74\just went click*click*click when turned on Video drive IC (IC1101) on the red CRT module
shorted. It looked like bad solder on the B+ was the cause

Frequently Used Top Five Repair Parts by symptom code
MODEL NUMBER : AV48WP30 - TV
SYMPTOM CODE : DEAD
TOP FIVE PARTS :
2SC5552-RL
2SC5904-RL
QQH0113-002
STR-F6629B/F7
STK392-110
Above from JVC Web site, also I have seen shorted video drive IC's on the crt boards short and cause this symptom. Try unplugging the 200 volt source to the crt boards and see it the set powers up and stays on. There is a B+ relay which supplies 130 Volts to the horizontal output circuit. Is this relay energizing? I takes about five seconds after the power is turned on for it to energize. If a short is detected on the 130 volt line the blue power lamp on the front will do what you describe and the relay will pulse on and off. (David)

Symptom:
Non-functional Digital Input
Solution:
1. Power off the unit
2. Disconnect the digital input if it is connected
3. Remove the rear cover
4. On the digital input module, using a shorting pin (PC type) or a
jumper, short Pin 1 and Pin 2 of the
SB connector
5. Power on the unit
6. Unplug the unit and remove the shorting pin or the jumper
7. Re-attach the unit’s rear cover
8. Power on the unit, and input the digital source

Jan 16, 2007 | JVC AV-48WP74 48" Rear Projection...

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