Question about JVC AV-48WP74 48" Rear Projection HDTV-Ready Television

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Need Service manual to line up convergence

We replaced the ic chips but don't know how to get into service mode to fix the convergence.

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How do i adjust the conversions on my av-48wp74

Posted on Feb 15, 2009

I went to JVC companies and a page came up and I selected services and I downloaded the manual.

Posted on Nov 01, 2008

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Posted on Jan 02, 2017

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1 Answer

How do you fix the color to a model 43fdx11b hitachi


Hello!you mean: colors out of convergence? nothing you can do about that, unless you replace 2 convergence amplifiers I.C. chips, plus all those burned 1 watt low ohms resistors with exact values, which only could be obtained via service manual or schematics. After resistor is burned, there is no way to read color code properly, due to partial evaporation of pigments. this is a "pro" job. If you try or tried, already to converge those "stubborn" crosses, there is more to do, even after you removed and replaced two 20 pin I.C. chips, soldered dead into sweep module, plus located and replaced resistors with precise values, you need to get your settings back to normal, by going into "factory service mode' or, at least into "convergence alignment" menu and fight with those crosses!Don't forget the white "****"! Otherwise, you will be re-servicing your set all over after 30 days of usage.good luck,Alex.

Feb 01, 2012 | Hitachi Televison & Video

1 Answer

Akai/Samsung PT4299HD Convergence Problem


Ck 3 low ohm resistors 2.7 ohms they will be on same board as ICs.

Feb 13, 2009 | Akai PT4298HD Rear Projection Television

2 Answers

Akai/Samsung PT4299HD Convergence Problem


Try resoldering the pins on the ICs first. If that fails to resolve the problem, change the IC responsible for RED. You should be able to determine that from the service manual. In that area you should also see either fuses or low valued resistors that feed the STKs. Check those as well.

Let me know if you need further info.

Dan

Feb 13, 2009 | Hitachi 53UWX10B 53" Rear Projection...

3 Answers

Convergence will not line up after replacing ic & resistors


Did you replace the resistors when you replaced the convgence chips? If one of them was bad you would still have the problem.

Here are some of the most common symptoms and example photos.

  • 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.
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Here is a quick test....

Using your original remote go-to the tv settings then goto the convergence section.

Try to adjust the red and then the blue convergence.



You should be able to move them up, down, left, and right.

If you can't move them in all directions your convergence chips are bad and should be replaced. This is a common problem.


2c07611.pngSolution


You need to replace the convergence chips and convergence resistors. Check the site www.TvRepairKits.com. They have put together a kits for most models. If you don't see a kit for your set send them a quick email and they will put one together for you. Their kits includes photo instruction guides, original Sanyo STK chips, convergence resistors, pico fuses, etc.

Jan 03, 2009 | Philips 51PW9303 51" Rear Projection...

2 Answers

Unable to resolve concave issues


I am also having the same problem. I tried to replace ICs but no luck. I am also looking for service manual in case if some one can give it to me.

Thanks,
Sanjay

Jun 24, 2008 | Sony KP-46WT510 46" Rear Projection HDTV

1 Answer

Rear Projection Samsung w/ convergence out


I believe it is mute-1-8-3 to enter the service mode, HOWEVER, I have also read that until the convergence problem is repaired, i.e. - depending on the configuration, either 2 individual IC's located on the lower board with 'playing card' size heat sinks or a simple replacmenet convergence board, adjusting the convergence through the service mode is comparable to "ripping the transmission out of your car to fix a flat tire". I myself have not gone into the service mode since I am still waiting for the replacement IC's - I get to do a component level repair.

May 05, 2008 | Samsung PCL545R 54" Rear Projection...

5 Answers

Panasonic PT47WX49E blue convergence


Here is a link where you should be able to obtain a service manual for your set. http://www.asm-service-manual.com/

To answer your second question. You have to be careful. Make sure you write down all current settings so you dont mess the Television set up worse. The code is the following.
Accessing the Service Menu w/ Remote:
  • in the setup icon, set anntenna to cable
  • in timer icon, set sleep to 30
  • exit menus & tune to ch. 124
  • adjust volume to -0-
  • press volume down on the set panel & red "CHK" appears onscreen
  • use tv/video button to change video inputs
  • use POWER button on remote to toggle menus
  • navigate service menu with up & down, L&R and action button
  • images are tall & skinny. you must adjust the vertical size & position in the NTSC mode, as these are global.
  • Then set the horizontal size & position for each mode(NTSC, 525p & HDTV).

    TIP: Use a dvd that has an aspect ratio of 1.85:1 (I used Starship Troopers) and make it just fit. Don't squeeze too much vertical as the AA9a60 may have some tearing on the top of the picture....this means you will have to cheat and increase horizontal size, cropping some info off the sides.
  • Try using ch.199 & the HBO logo to adjust...the "O" in HBO should be perfectly round (HTPC owners can use VE DVD and the ANAMORPHIC test pattern: title 20 chapter 5 I think). Now you will find your geometry is bowed & convergence is out of whack.
  • First do a STatic adjustment, then do a DYNamic adjustment.
Navigating the Dynamic Convergence Menu
  • cursor buttons- moves cursor postion up& down, L&R
  • #1 button-cycles thru each color gun & combos
  • #2 button-cycles test patterns (normal & dense)
  • #5 button-shows program material in background
  • #7 button-save data...do this often as the set sometimes shuts down in the middle of your work!
  • mute button: cursor data..push to adjust current position.
  • swap button- confirm
  • power-exit
For your final question You should have( 2) STK392-110 convergence ICs in that model. Thats probaly your problem. I would recomend changing them out before adjusting any setting via the service mode. Thes ICs are available from http://electronix.com/ for 5.99 each. Hope this helps let me know if I can be of any further help.

Jan 04, 2008 | Panasonic PT-47WX49 47" Rear Projection...

1 Answer

Blue horizontal bows/lines


Replace convergence IC's,then check alignment.

Use OEM quality ==I use Panasonic IC's with no call-backs.

T.

Oct 13, 2007 | Samsung PCN5425R 54" Rear Projection...

7 Answers

HC-P4752W - IC Replacement vs Convergence Module.


The colors weren't lining up correctly on my HC-P4752W which is only about 30 months old. I did a little bit of research and got ahold of the people at http://servicemanuals.vstore.ca/ They recommended replacing the IC's as well as the IC resistors. I purchased the replacement parts from their site and made the repairs myself. I should mention that I didn't have any previous soldering experience. The repair was easy and a complete success. You may find replacement parts elsewhere for slightly cheaper but what you won't find is the prompt and detailed customer service that they provide. They gave me there # and said to call if I had any questions before or during repair. I took advantage of their services and got answers every time I called.

Aug 11, 2007 | Samsung HC-P4752W 47" Rear Projection...

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