Tip & How-To about Televison & Video

Mitsubishi TV service.

Channel tuning, snowy pix. IC 703 selects tuner band switching, check printed circut board from terminals 11, 14, 15, 16, and 17 to the tuner solder terminals. Possible intermittent open. I corrected this with jumper wires. TV tunes perfectly now.

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I have Universum FT 81804 tv with 11AK19 chassis that wont save channels. I replaced IC Memory chip and it still wont save any channels.


Check whether there is AGC voltage change at the AGC terminal of the tuner, when a channel is tuned. It should change as soon as a channel is tuned. If there is no change in this voltage, make sure that the tuner is faulty.

Sep 20, 2013 | Televison & Video

1 Answer

LG M227WDP tuning problems


Hello
sounds like the memory IC to the TV has damaged. It is an IC, which stores all the cunsumer adjusted data, as digital signals, and retrives thme to the main system control IC, each time the set is switched ON.
It is an 8 solder terminal one, a small IC. Even though, its size is small, function of this part is very crtical, when the set works. This IC can be located very near to the main system control IC, and can be bought from most of the electronic spare part selling shops at your town.
The only thing you need is, to locate this component on main baord, and desolder it out, and resolder a new one in place. Somewhat skilled work indeed.

Feb 22, 2012 | LG M227WD-PZ LCD TV

1 Answer

JVC AV-27820 turn on the a white line accross middle


Hello
Total failure of vertical sweep occured whic your JVC TV. There are mainly two resons for this fault.Loose soldering terminals of the vertical output IC is the first one. The second one is of failure of the vertical output IC itself. You have to locate this vertical IC. It can be located at the main board. Vertical IC will be screwed on to a metal heatsink to radiate heat from it while it works. You can identify it very easly, if you have knoledge in electronic circuts abd printed circuit boards.
Resolder all the solder terminals of this IC first, by applying a little more solder; without making any solder bridge short in between the close adjecent solder terminals, and see whether it helps you. If not replace it with same type and number. OK.

Oct 08, 2011 | JVC AV-20220 TV

2 Answers

picture clear then fades to snow when it does, makes annoying sound


sounds like poor solder on the ground conections of the tuner, depending on the age of the TV frostman

Feb 11, 2008 | Sony KV-27FS13 27" TV

1 Answer

Hitachi snowy screen and noisy


you have broken solder connections inside the tuner, you`ll need a tech as it is soldered in and once removed the board inside will have to be re-soldered. An alternative would be to use the AV outputs of your cable box or vcr to the AV input of your tv, this bypasses the tuner circuit, you will of course have to go into the tv`s menu and switch to AV 1 or AV 2 whichever input you use, good luck& Happy Holidays

Nov 29, 2007 | Televison & Video

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