I have a sylvania PTV-375 made by magnovox.

I made a costly costly mistake, i outta kick myself in the head for.

I changed the glycol, and the convergence was out. so, i didnt think that it
had a customer convergence menu, and i started out on the wave form board,
and tried to get it in, and never did.

I found the prints, that has the wiring diagram/convergence proceedure.

So, I attemped again. and followed the proceedure step by step, until i got
to the step and quote:

"3. to prevent customer controls from affecting adjustments, connect jumpers
between the following tie points (resistor junctions) and ground (pin8 of
IC17) on the convergence waveform panel: "1A"(R254/R252), "1B" (R260/R262),
"E" (R264/266), "F" (R256/R258),"

Well, i did this, and apparently they werent specific enough, because i
soldered the jumpers on the wrong side of teh resistors! so, i took out the
convergence board.

I'm pretty sure that IC17 is dead now, which takes care of the customer
convergence menu. and none of the knobs on the board function anymore.

the picture is smaller, and no longer centered. the supply rail resistors on
the convergence power board began to smoke, after i unsoldered. and opened.
it also opened 2 fuses on the power board also. i replaced all of that, and
tried again. with the jumpers off, and it opened the stuff again.

I disconnected the wave form board, and replaced the parts again. and this
time, the heatsinks are not too hot to touch as before, and the power board
is stable. but, there is no convergence obviously.

if i leave all the plugs in, the picture will shrink and start to smoke the
convergence power board again. I pulled the power connector to the wave form
board, and it stableized again. and of course, the customer convergence is
gone from the menu along with no response from board, because there is no
power.

I plugged the power connecter J607 back in, and unplugged J613 wich is the
convergence drive output, and the board was still stable, but no customer
convergence, and the board was getting power. So IC17, is fried becase there
is no menu for convergence anymore, and if i have both J607 and J613 plugged
in, it begins to smoke the convergence power board. im guessing the wave
form comming out of the wave form module, is so corrupted and noisy, its
overloading the power board and smoking the power resistors to the 20V
supply rail. The 12v supply rail is getting to the waveform board. if i pull
the power J607 the resistors dont smoke. if i plug it in, and unplug the
J613, it still dont smoke.

But, if both are plugged in like normal, it will smoke.

Any Ideas what IC on the wave form board seen its death besides IC17?

they need to be more specific where to jumper. because there is 2 sides to a
resistor. not one. the power board output transistors, and other various
components test fine. so the power board didnt go with it, its the signal
wave form board that is loading down, or overloading the power board with a
bad signal. of course, the convergence menu is gone now, and the board is
unresponsive.

help.

anyone??



"Mike" wrote in message
...
I have a sylvania PTV-375 made by magnovox.

I made a costly costly mistake, i outta kick myself in the head for.

I changed the glycol, and the convergence was out. so, i didnt think that
it
had a customer convergence menu, and i started out on the wave form board,
and tried to get it in, and never did.

I found the prints, that has the wiring diagram/convergence proceedure.

So, I attemped again. and followed the proceedure step by step, until i
got
to the step and quote:

"3. to prevent customer controls from affecting adjustments, connect
jumpers
between the following tie points (resistor junctions) and ground (pin8 of
IC17) on the convergence waveform panel: "1A"(R254/R252), "1B"
(R260/R262),
"E" (R264/266), "F" (R256/R258),"

Well, i did this, and apparently they werent specific enough, because i
soldered the jumpers on the wrong side of teh resistors! so, i took out
the
convergence board.

I'm pretty sure that IC17 is dead now, which takes care of the customer
convergence menu. and none of the knobs on the board function anymore.

the picture is smaller, and no longer centered. the supply rail resistors
on
the convergence power board began to smoke, after i unsoldered. and
opened.
it also opened 2 fuses on the power board also. i replaced all of that,
and
tried again. with the jumpers off, and it opened the stuff again.

I disconnected the wave form board, and replaced the parts again. and this
time, the heatsinks are not too hot to touch as before, and the power
board
is stable. but, there is no convergence obviously.

if i leave all the plugs in, the picture will shrink and start to smoke
the
convergence power board again. I pulled the power connector to the wave
form
board, and it stableized again. and of course, the customer convergence is
gone from the menu along with no response from board, because there is no
power.

I plugged the power connecter J607 back in, and unplugged J613 wich is the
convergence drive output, and the board was still stable, but no customer
convergence, and the board was getting power. So IC17, is fried becase
there
is no menu for convergence anymore, and if i have both J607 and J613
plugged
in, it begins to smoke the convergence power board. im guessing the wave
form comming out of the wave form module, is so corrupted and noisy, its
overloading the power board and smoking the power resistors to the 20V
supply rail. The 12v supply rail is getting to the waveform board. if i
pull
the power J607 the resistors dont smoke. if i plug it in, and unplug the
J613, it still dont smoke.

But, if both are plugged in like normal, it will smoke.

Any Ideas what IC on the wave form board seen its death besides IC17?

they need to be more specific where to jumper. because there is 2 sides to
a
resistor. not one. the power board output transistors, and other various
components test fine. so the power board didnt go with it, its the signal
wave form board that is loading down, or overloading the power board with
a
bad signal. of course, the convergence menu is gone now, and the board is
unresponsive.

help.

I might have an entire working convergence wave board; post the board number
and I'll check.

00A10423-B002
CONV WAVE FORM BD
90351 M4T3 90



"BWL" wrote in message
...
I might have an entire working convergence wave board; post the board
number
and I'll check.