Low Voltage sony kv14af1

[duldog]

i've got a sony kv14af1 with low voltage from its power suppy (B+ is 98V, the other outputs are also low) causing it to have a variety of symptoms.

i separated the power supply from the rest of the tv and substituted a 60w bulb at its main output. the output is still the same.

i've replaced the power supply ic(strf6614), opto-isolator, ref amp (se135) but the output is still the same.

i don't have schematic for this unit and i'm running out of ideas. any help would be greatly appreciated. thanks!

[Rainbow]

Re: Low Voltage sony kv14af1

Are the caps good?

[kc8adu]

Re: Low Voltage sony kv14af1

make sure the input caps are ok.
had a small sony table set that had a dim shrunken pic with hum bars.
main filter was open.
had a tag from a tv shop that said bad flyback.
ROFLOL!

[duldog]

Re: Low Voltage sony kv14af1

thanks for the replies!

i've already already replaced the main filter cap in the primary side as well as all the caps in the secondary side.

i'm already running out of ideas, help me please. thanks!

[Johnnysan]

Re: Low Voltage sony kv14af1

Sounds like the PS is operating off-frequency. Replace the electrolytics in the power supply that are 1 to 4.7uf.