Question about Toshiba 43HX70 43" Rear Projection Television
Hi! I've done the old tried and true replacement of the convergence STK ICs and the blue would not adjust horizontally so I also replaced all the resistors. No Help. I then replaced the two ICs again with new ones. Now I have audio but no video at all.
The service manual mentions the 6 resistors are 1.2 Ohms but I've noticed the 2 on the outside edges appear to be a different color code than the other 4. The video still worked after changing resistors but didn't work after changing out the ICs again. Any idea what could be causing my 'no video' issue now?
I suspect I could've also blown a fuse (high voltage?) and if that causes no video, any idea where the fuse(s) are?
Thanks in advance!
How do i test the IC chips?...
Posted on Jan 29, 2008
I think the hardest to solve problems are those I installed!!
Where do we start==no lecture,but I never change a resistor
unless it has changed (in value!) Use a digital meter and check
the value of each resistor.Toshiba is a bit confusing as to values
of each resistor and location in relation to the IC's.Go over your own work first.Check micro fuses in power supply=F851,F852,
etc. Carefully resolder steel jumper wires at board edge,they feed
B+ to convergence amp circuit.Be sure to verify no shorts in pins
of IC's.(use your meter).........T
Posted on Oct 25, 2007
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