sony kv35v36

slide 17 · Guest

have sony kv35v36 and the picture went out then came back now its small static lines in middle but sound works fine someone told me to change resistor r536 will it help or what else to do

minnie · Joined: 18 Aug 2005 Posts: 2880 Location: Hell

Solder up or replace the verticle IC.

dolescle · Joined: 08 Nov 2006 Posts: 7

I'll back up minnie's post..solder it..

noori · Joined: 08 Nov 2006 Posts: 3

Dear Friend, check Video out put transisitor collector volt(i.e 180 volt) emitting from the fly back.
And change the capacitor 22uf 250 volt it is on the 180volt supply.

indian tiger · Guest

check the smps power supply, if you have an osciloscope check any voltage spikes in there, and any fluctuation in the voltage to the collector of the fly back transistor, check the damper diodes on the collector of this transistor, and the fly back capacitors arround there.
i will be soon
Indian tiger

Guest · Posted: Thu Nov 30, 2006 10:40 pm Post subject: kv35v36

The SMPS power supply is very delicate and critical in this sony cercuit. first of all take out the power supply disconnect from the main board and digaussing coil and connect to mains. (be careful each time you discharge the main smoothin capacitor after turn off power and do working). check the B+ voltage, if any fluctuations suspect first the zener diode in the board that between B+ and -ve. check the smoothing capacitor also.
if both are good check the recifire diode (bridge) .U could use 4 individul diodes (high voltage high efficiancy 3 amp,600v will get may be in radio shack) ones to replace this,recifires could be bad all times...
i will be soon
Indian tiger