Sony Tuner KV-20TS27 loses signal

it could be the signal strength for your cable isn't strong enough. alot of people are encoutering similar problems ever since the digital switch over

main tuner needs to be replaced

check cable/ antenna first,if everything okay, the tuner assembly might be ta fault.

Hi, Sorry this tv has an NTSC tuner which is analog. But it will work if you have cable or satellite.

Hi,

If you have confirmed that there is cable signal but the Sony TV does not sense it, then perhaps the problem is internal to the TV. Primary suspect would be the tuner block/assy and/or its B+ supply. Often there would be two (2) voltages required; 12VDC & a 33VDC (varying). In some instances it could just be the zener diode.

The above of course would require a fair familiarity of electronic components/circuitry and safety procedures, use of a DVM and a soldering iron. It would be to your added advantage access to a service manual or at the very least a schematic diagram with voltage readings. Should you be uncomfortable performing a DIY (do-it-yourself), perhaps your best bet would then be to seek the services of a qualified professional.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards. Thank you for using FixYa.

It is very possible that the tuner and IF modules have failed. On more rare occasions, the supply voltage to these modules may be missing because of failed components in the regulator circuit that feeds the front end area.

Some other areas of failure can be the uPC controler may not be addressing the front end functions, or the input switching control is not working properly.

The mentioned problems would require an experienced TV tech who has the service manuals, and the tools and facilities to troubleshoot and service your set.

If you decide to have the set serviced ask for an estimate. It may be expensive to fix.


Jerry G.

pls check the antina or the cable line or the cable plug or call the tech.
in the tv tunner foulty

Check is RF Antena/ Cable connected? If yes, go to TV Menu and select Auto-Program. TV will start tuning and search all available channels on cable/ on-air. If there is no channel reception, TV has defective Tuner. If you know basic electronics knowledge, replace the Tuner or contact nearest Sony repair shop.

Try turning down (off) the color during such an episode. If the image is tinted pink or green instead of black and white when you do this,you have either an intermittent short in your CRT (tube), which is terminal,or a gun drive problem, which may be repairable. If you're feeding it component instead of composite signal,it may just be a bad connection of the B-Y cable.

try going into the menu of the tv and changing the tuner type from ANT to Cable