Sony KVM1621 16" crt TV

[Davi.p]

Hi, my second post... i've opened a tv which i suspected in cold solderings,
but i've done a stuoid thing when discharging the big cap, i put the discharger in the wrong place, in the scheme below i marked C and D the right point for the Cap and A - B the wrong place i done.

<img src="http://web.tiscali.it/bps_impianti/schema%20Tv.GIF">

After that tv brokes and i can only say which measurements i've
done on the IC and the transistor and the correct values from
schematic sheet:

IC pins my measure scheme meas.
1 -41,x -41,2
2 222 0,3
3 303 268
4 9 0
5 -33 -33

the transis.
B 0 0
C 222 0,3
E 0 0

transistor and diodes are not short or open.. thankyou, bye...

[Davi.p]

Re: Sony KVM1621 16" crt TV

Sorry stupid not stuoid ...
the link is http://web.tiscali.it/bps_impianti/schema%20Tv.GIF

[Davi.p]

Re: Sony KVM1621 16" crt TV

Sorry B in the transistor measures 9v..

[Davi.p]

Re: Sony KVM1621 16" crt TV

Sorry!! My new autorange tester makes me mistake, the outputs of the IC that i
mentioned are all correct apart a little discrpance on pin3, 303v instead 268..
there are no outputs on the secondary side of the big Transformer , there is
300-320V on input part on two pins, the one coming from + of big filter capacitor,
the other that coming from pin 3 of IC, the other three are millivolt..

[Krankshaft]

Re: Sony KVM1621 16" crt TV

You're going to have to buy a service manual for this set which will specify the proper voltages then you can compare them to what you have.

There is a handful of things you could have blown during discharge short of posting us a detailed schematic illustrating which cap you discharged and where you discharged it to see what paths the current might have taken and more importantly through what semiconductors. There isn't much we can do.

Not to mention you haven't described what operating condition the set was in PRIOR to the blowout.