Electronics Forum / Repair / April 2006

Greets!
I want to start a HV project but no matter how many flyback resellers
and manufacturers I browse, noone seems to have data sheets ont he
available models. I need secondary windings, overall output, etc..

I have a Panasonic AG-MD830E S-VHS VCR that will not power up. The
fuses are all good. I have removed the power supply module, and the
main components (other than capacitors, transistors, resistors, coils,
and op-amps) include an STR-M6545 IC (4-pin) and a VLT0731 transformer.

What control signal to the main CD micro would disable spinner drive.
Taking the I/P H(ish) of the releavant 1/4 of the BA6398 quad motor driver
gets the motor spinning.
Taking the I/P L(ish) of the isolated inv buffer on the BA6398 also fires it

I'm servicing a Daewoo DTQ-27S2FCV television. The HOT and switching
regulator transistor were shorted. I replaced the HOT with an RCA sub but
still stamped with the original part number, 2SD1880. I replaced the
regulator with an NTE 379 which is a sub for an E13009-2. The set ...

I am currently converting an old sit-down racing arcade game into a
dedicated xbox racing game.  I know that probably sounds funny.
Basically what I have is this...I purchased an old arcade driving
cabinet that was gutted.  (the original arcade monitor and controlling

This is an old electric powered oven. Ive never touched the timer but
it is giving off a noise like low boiling water. The transformer is hot
to the touch. Disconnected power to oven and noise stopped. I assume
that when the timer and oven are off that the transformer should not be

I have a viewsonic P775 that seems like it gets no signal.
the green light comes on for a few seconds once you turn it on, then it
turns to amber. no matter if there is a signal or not. I can hear a quiet
sqeal when the light is green but nothing on the screen.  I have tried both

Is this an appropriate group to ask a question about a problem setting
up a new tv with a DVD/ VCR combo unit and if not can anyone suggest
other more appropriate groups. TIA.

Hello people, I currently run a DVR which records CCTV images around my
home. It has a 250GB HDD but I want to add another 160G via using an
external HDD housing. As my DVR housing only supports one HDD, would
adding another (externally) cause an electrical overload?          Mr J

Model #B25AO2Z - Set attempts power up as seen by horizontal flash on
picture tube but never comes up. Hitting the power button repeats the
symptom. I was guessing this may be in the horizontal section so Iv'e
checked several caps in the area, but haven't replaced the HOT since it

This is the story of a long saga with a mixed outcome, so make
yourselves a coffee or a strong one and settle in...
We have two 24" flat CRT(conventional) TVs in our home - a Sony
KV24-S120 and a Toshiba 24AF-43. They aren't huge but they have given

Can anyone please provide me with a simpson 260-7 or 260-8 calibration
manual or detailed instructions how to calibrate a simpson 260-7 or 260-8 ?
Thanks

Anyone know whether the pots in the Tx are used in "variable voltage
out" form or "variable resistance" form to control the channels? I
presume, due to 3 wire connection that its the former but id be pleased
if someone could confirm? I'm trying to modify one to accept inputs

I have a Pioneer Elite Pro-1009w RPTV that works beautifully except
that every once in a great while, it will switch itsself off (goes into
standyby) with no symptoms of any kind before doing this.  Is this a
common problem with these sets?  I will be checking solder joints on

I'm working on the above mentioned set for someone. Symptom is no
picture, sound is fine. At first it was intermittent and would respond
to smacking it but now it doesn't, as is usually the case the owner
continued to use it for about 9 months until it quit entirely.