While watching the above JVC TV, all of the sudden the screen went
black and I heard a heartbeat kind of thumping coming from the
speakers. The TV did not respond to the remote or the manual power
button. Blue power light stayed lit.
I unplugged the TV and then plugged it back in after a minute or so.
Heard the thumping again and then the blue power light started blinking
on and off. No other response.
That was quite a while ago... Now I got some info that said the problem
was a condition called power supply overcurrent shutdown. The TV is
going into a protection mode to prevent further circuit damage. I also got some info from a Net User who has the same TV with a similiar problem and she said that the had 2 "Convergence Amps" replaced and that fixed her TV.
Now, the TV sat at a repair shop for a while and then I was told it was going to take $400 to fix the problem.
I can't afford it so I am hoping that the issue is something I can fix
myself. I am relatively intelligent, can read a schematic and am handy
with electronics and tools.
Can this be something I can fix at home??
Thanx for any info...
But my friend, Do you have experience with TV repairs? A TV set is not a place to be handy or experiment with electronics as there are Hgh voltage safety issues involved here. Is it worth saving a few bucks to get your self knocked against a wall and maybe killed?? You can replace the ICs for the convergence IF you know how to solder and trouble shoot solid state electronics. they will start with STK###-### the # are numbers and they will be standing up on a convergence board. if you know how to read a schematic , you should get a manual for this set too. Good Luck Remember Dont tinker with a tv set. Its not a car stereo or a cd player. BE carefull. Good Luck
Thanx for the info.. Much appreciated. Yea, I know what you mean.. I don't like playing around with it too much. But if it's a simple repair....
Judging from your response, it sounds like that you think it is the convergence issue rather than the overcurrent shutdown issue.
Is that correct??
Again, thanx for the response...
EDIT:
And, just to clarify, the ICs you are referring to are these ones, correct?
According to the schems, that is an SDK392-110
Michale
Thanx again... :D
OK I got the Convergence Board out and I am still breathing.. :D
On a side note, I read something about this model JVC having some photo-electric cells that disabled the TV or something. I put black tape over the cell windows prior to plugging in the TV and testing a setting. I hope I didn't mess up by not taping the photo-electric cells immediatly.
Anyways, I got the convergence board out and I do not see any overt or obvious damage to the 2 ICs. I guess I was hoping for a black, gutted IC as a sure sign it was messed up.
As I said, I do have the JVC Service Manual for my particular model. I have been thumbing thru it to see if I can find some diagrams or such that will allow me to test the ICs using a volt-meter.
So, I guess my question is, can I test the ICs just with a volt-meter? Or do I need some high end tools like a scope or such.
Thanx again for all the help. It's greatly appreciated.
Michale
Just replace with the same numbers and also be sure to test the low value resistors by the IC's with an ohm meter.
Mr Dillon!!
Many thanx for the assist.. I just got the new Convergence ICs and replaced the old ones.
TV works now!!! :D WOOT WOOT
Now, if I can just figure out how to adjust the convergence without the remote, I'll be a happy<er> camper! :D
Thanx again for the assist...
Michale
You have the service manual? It should state in there the correct way to manually adjust the convergence. Is it (the service manual) a PDF, electronic,or a paper version. If it is a PDF or electronic, you can forward it to me, and i will explain, best to my abillity, how to do what you need.
Thanx,
You can download the file here:
http://specialopsdivision.com/temp/AV...
It's in a .djvu format. I have included the viewer in the file above.
Your assistance is greatly appreciated.
I have a PRONTO remote where I could program the remote into the PRONTO. I am trying to locate the DISCRETE IR Codes for this particular TV Remote (RM-C322G) but it's proving difficult.
Thanx again.
Michale
Ok, I looked over the manual, and Im afraid you can not adjust the convergence with the universal remote. You can get an original replacement remote from http://www.remotes.com for about $52.00 + shipping. Also im not sure you can adjust this properly , as your going to need a cross hatch generator. If you have one, then you need to look at Page 22 for the service menu, and pgs 35-40 for the convergence adjustments/alighnments. Read through this first and see if you think you can handle this. Maybe a repair person could alighn it for you for a good price? If you do decide to let a service person do thius for you, copy the pages I ststed so it will be easyer for him/her, and less expensive for you.
Thanx...
My PRONTO remote has most of the needed buttons already programmed in. All I really need is to be able to push the SELECT button to alter the color of the Convergence Adjustment Tool. It defaults to RED, but it is the BLUE and GREEN that needs adjustment. Go figger..
I think the remote is at the repair shop where I had the estimate done. I am waiting for them to open up so I can confirm.
Thanx again.
Michale
I have a JVC AV-56WP30 as well, with a green lamp convergence issue. After reading various forums I ordered STK392-180's as replacement ICs, I put those in and had the black screen, blue power light flashing, relay clicking, speaker thumping deal going on. So I took the 180's out again an dput back in the original STK392-110s and was back to where I started. So, just to be sure I put the 180's back in and got the thumping again. So I don't think it was my soldering or anything like that. I got two replacement STK392-110s and put them in and the green convergence is still warped.
I noticed the B, G, R lamps each have their own socket on the CKF1589-E01-1 board, I plugged the green lamp into the B socket and the blue lamp into the G socket and the picture looked just like the orginal only now the Blue lamp is the one warped and the green is fine.
So I started looking closely at just the resistors near the G socket. The one marked R862 on the board does look burnt a little. Looking at what is printed on the resistor itself, it says this;
1.8ΩJ RNX1 PU 24P
Does anyone know where I can purchase an equivalent resistor? I have looked around and can't seem to find anything that is the same. Or any other suggestions?
I have the same tv and replaced the ic's but can't get red to converge i let it warm up the problem is i am able to move it side to side but not up and down and also on some the red cross is twisted cked the resisters ok any advise would be helpful
I have a similar problem AV56WP30, I replaced the Convergence IC's and still had problems adjusting. Went back and checked the board and the solder was good. I did notice that R854 (1.5) and R862 (1.8) R859 (3.3) were open and black in the middle. Being that I live in Okinawa I found the only store with resistors (Japanese Ham radio store) and got what I belived to be replacements. Same ohms but wasn't sure what the Watts should be on the originals so I went with 1 watt. Upon smoke testing, R854, R858 and now R850 (2.2) were toast. Any Ideas what is causing the resistors to fry? Am I using the right watts? OBTW, the picture does come on? Should I try 3 watts?
r850 2.2 1wmfr blue
r854 1.5 1wmfr blue
r858 3.3 1wmfr green
r859 220 2womr green
r862 1.8 1wmfr green
Thanks, unfortunately the choices at the only store I can find here in Okinawa are 1 watt or 3 watts. Would the 3 watt replacement work?
Here is the 56wp30 convergence pwb pic link, if I have done the insert pic procedure:
http://www.techlore.com/article/21048/How-to-Upload-Pictures-and-Post-Vi...
correctly.
Thanks, tried it again, when I plugged it all back up...R850 cooked again (1 watt). R854, R858 and R862 were still good though. Instantly heard a slight pop, then 858 started to smoke/cook. Picture came on in red only covering about the bottom 2/3 of the screen with no red along the sides before I shut it down, had the speaker dunk, dunk, dunk going throughout after the initial pop. The Heat shroud connected to the convergence on the blue side was hot, R854 and R858 were also very hot. Any idea why the same general resistors would be blowing and getting hot?
seems like I have a convergence issue, My picture is blurry on the right & left side but the middle is perfect.My grandchild may of hit the set somewhere on the front. ANY SUGGESTIONS..ANYONE
I did, that was the original thing i changed before i read up on checking the resistors. After the convergence IC's didn't fix the problem I checked and found the bad resistors. Changed them and the same ones continued to go bad. Not going to be able to work on it for a while as it is getting packed to get shipped back to the states with the rest of my Household goods. If you have any ideas i'm open to suggestion though.
on some circuits, if the feedbak resistor ar bad thry can blow out th new IC, so you may need to start over again. :>(
hi i have change the two IC's stk392-110 for stk392-150 and the R842 and i plug the board and i have juste the blue power on led and no picture its black.
please can you help me
thanks
hi
i was change the two ic's stk392-110 with stk392-150 and r842 and plug all wire and convergence board and TV i put power on ihave juste the blue power on led and no picture no convergence problem :) all is black
please help
thanks
I have a JVC AV-48WP74 TV with the same issue. Replaced both STK392-110 with STK392-150. Turned on TV & had the same red issue. Replaced 1.8 ohm power resistor # R862 with a 5 watt 1.8 ohm power resistor & the resistor cooked & heated up the IC very hot. As recommended by Larry above, I will try to replace the IC804 IC & R862 resistor again to see if it fixes the issue. Any futher recommendations would help.
I would never ever tell anyone to replace the stk***-110 with the STK***- 150!!!! I t should not be done!!! You should ONLY replace with the IC'S that are in the set!!
Larry
It was recommended to upgrade from 110 to a 150 IC on another site. I changed to the 150 IC approx 3 years ago when the original issue occurred. I do not know anything about these IC's. What would be the issue to change from 110 to a 150 IC? Any feedback on my current issue? Would it be related to the 150 IC? Thanks.
I am installing the convergence repair kit for my JVC AV-56WP30 and I have noticed 2 resistors that might be bad, can you please tell me the resistance value for R842 and R858 so that I know which resistors to replace them with?
R842 is a 1 WATT resistor @2.2 ohm.
the R858 is also a 1 watt@ 3.3 ohm!!! make sure YOU REPLACE THEM WITH THE EXACT VALUES AS THIS FEEDBACK CIRCUIT IS VERY UNFORGIVING!!!!!! a kit would have given u the exact resistors you needed as well as the proper ic's i really hope you do not go and try those inexpensive convergence ic's just to save a few buck as they do not last as most buy online are-aftermarket or factory reject ic's and do not last. do not forget to install a good coating of new silicon thermal grease on the backs of the new ic's before installation!!!!Larry Dillon
Larry DILLON
Thank you for your assistance. The kit did come with 6 resistor, including the 2 that I am replacing, but I could not read the numbers on the old resistors and I did not know which new resistors I needed to replace them...