View Single Post
  #4   Report Post  
john
 
Posts: n/a
Default Toshiba Model # CF2765K Chassis #: 9010 Vertical Problem

Check that diode close to the heat sink for leakage.

kip

--
"Watch the return E-Mail addy its false"
"Robert McPherson" wrote in message
om...
Set originally had bad linearity at top & side bowing (pincusion)
problems.
I have fixed both of those problems, but still have about 1" of black
space at bottom of raster. There is no available Howard Sams
Photofact on this model or chassis that was produced. I have changed
all of the usual capacitors, and replaced the AN5521 vertical IC. All
of the waveforms going into and out of the IC appear normal. All of
the DC voltages on the 7 pins of the IC are normal, EXCEPT possibly
for pin 2 (Vertical output) The DC voltage is almost 8 volts, but the
DC voltage called for on a similar? Toshiba TV (Model # CF2665K)for
which I do have a Photofact calls for 15 volts on Pin 2. The diagram
I have seems to be very closely related, but it does not show a
pincusion board which my set has. I am wondering if the DC voltage on
pin2 of my customers TV should also be 15 volts, and if so, why is it
lower About 8 volts) than normal. I can not tell from my diagram
where the DC voltage on pin 2 should be coming from. Any ideas?
Anyone have a scanned section of the exact schematic which you are
willing to Email me as an attachment? Thanks for your help. Robert
McPherson.