Dear All:

I have been given Magnavox 20MS3442/17 TV which had vertical deflection
problem - top half of the screen was squashed and retrace lines on the
top of the screen. The unit is about 9 month old, only parts warranty,
so it will be more than $100 to repair...

Not sure about chassis - there is almost unreadable white sticker "32 5
29 56".

Nothing is burnt or physically damaged.

Unfortunately I don't have schematics, but do have overall knowledge
how TV works and used to repair TV (20 years ago:-).

I was advised (in another forum) to check/replace C301, C302, C304 and
IC301 (output vert. IC). I replaced the capacitors, observed polarity,
turn it back on and it is completely dead now.

And the details what I have now:

- fuse is fine;
- C806 has 170V and stays long after I disconnect the power cord;
- LED does NOT illuminate, no flashes even once;
- no clicks, ticks or anything;
- no voltage after T803 (like on D833 against pin 11 of T803)
- Q801 is possibly good (I unsoldered, compared resistance G-S to the
spare one, appears same);
- IC802 has 3.5V on 1-2 pins and 4.5 V on 3-4pins.

IC801 is MC44608P40 (8pin) and I do not have a spare.
All schematics I have is MC44608P40 datasheet where is an example power
supply with opto coupler and power MOSFET - looks similar to what I
have.

Help anyone?

And if anybody have the schematics of power supply and deflection to
email me - that would be very much appreciated.

Thanks in advance.

Igor

Sorry it was a mistake:
Actually IC802 has 0.4V on 1-2 pins and 4.5 V on 3-4pins.

Thanks.