Electronics Forum / Repair / May 2004

         Update, More Information (9-2064, not 2065) Sams 4265:
  I found a schm. for a different model Zenth that has the TA1268N
(56 pin) IF/Video Processor IC.  The P-P chroma signal input on
pin 45 is well below the .8V P-P on schm.  I wicked out the pin to

the CRT tube 240NB4 (green) is used in an old computer monitor. I have to
replace this tube. I found a C10M36P31 (alternatively shown in the diagram
for this is a 2728831) with the same dimensions. I do not have any data
sheets about these tubes. Does anyone know if I can replace ...

I have a viewfinder from a broken camcorder that I would like to convert to
a little TV / monitor, but I don't know the pinout for it.
Does anybody know the pinout for it?
If so, please respond soon!

I would like to use a 12V automotive type starter motor to propel a
very small electric vehicle. This motor is unique in that there is no
Bendix drive on it, (its an old Ford starter), with just a shaft. I
realise that a series wound motor is probably not the best choice for

Been looking all over for it off pin 9 of fly & all over the circuit
board. I've got a simliar Tosh chassis & I found Q471 right away (next
to back by fly) but for some reason I can't find it on the CZ36V61. Any
help is greatly appreciated. I hate to have to order the manual just to

I have a proveiw pro-700 monitor that when you turn on the power, the
front indicator light flashes on and off. There is also a relay by the
power supply that constantly clicks while the indicator light is
flashing. Has anyone run into this problem? Thanks, Rob

Could someone please help me.  I'll wanting to change the
flyback output of DC voltage to AC voltage.
Thanks,
Greg

I have a KV27V22 (Chassis SCC-K96R-A) which turns on with sound, led
blinks on front, but no video.  Sometimes the set will play for a few
minutes and then go blank with sound.  It acts like the high voltage is
not getting to the right level (haven't checked the +135 yet).  Possibly

Hie all,
I have a 3-year old JVC HR-A57U VCR which has been well-used but
well-maintained. When I play a cassette, the VCR plays for 2-5 seconds
and shuts down. Sometimes a few more tries gets the VCR to play

I get no output. I see no burned componentry or bulging caps.
Balance and mains (on-off) switches/pots working. Jumpers to rear panels
jacks have conductivity and the power-t show no apparent heat/gapping.
What else should I be looking for?

I have a Coleman Powermate Powerbase 2250 watt generator.  During a
power failure last week, I started it up and started running the furnace
and the refrig.  It ran fine for 10 minutes, then suddenly stopped
generating.  The Briggs and Stratton engine continued to putt along just ...

The customer was complaining that the set would shut off after being
on for varying amounts of time. If he waited about a half hour he
would be able to turn it back on again.
The first thing I did before I even attempted to power it up was to go

There is no longer any vertical deviation for my Toshiba CX29699 television.
From what I have gathered from other similar posts, it might just have to
change one or a few capacitors. I would like to know if anyone has a
schematic of the unit or just let me know which area makes up ...

Has anyone any experience with plasma monitors? I've been looking around for
a schematic for a Pioneer PDP V402 4:3 ratio plasma display unit. I have 2
bad ones I'd like to try and make one good one from. The screen of one has
screen burn, and the second's screen seems fine, but the ...

Need docs describing how to program features for each set.
Thanks,