Electronics Forum / Repair / November 2007

I'm trying to help a client over the phone with this Sharp LC-37HV6U
television. He is trying to hook up his satellite box to this TV with a DVI
cable. The DVI cable he purchased does not fit at the television end. I went
online to see what types of DVI cables exist. I found many ...

Hi, does anyone know a schematic or a replacement pcb source of cheap 150mm
Chinese digital calipers? 0-button and pc-readout-port are not working. It
still measures; display, Inch/mm and On/Off are ok too.
Thanks,

Dead, won't come on, led is on at standby, & just flashes at turn with
remote, indicating SMPS is ok, & getting signal to turn on. Unplug
connector CNZ04 from convergence, pop in speakers, tries to start, but
shuts right down. Sanyo STK 394-250 IC's seem ok, & all fusible

I have what appears to be a power transistor in a TO-220 package that is
in a Toshiba television. The number on it is S1854A, I can`t seem to
find much info on it other than it is a OEM number. Does anyone know
what this device is or if there is a substitute? I also have a ...

Model # 52HM84, it takes six, or seven tries to get it on, then it's
fine. Ballast, or light engine?
Don't have any parts to try in this model. Thanks, Dani.

M # KDSR60ZBR1. Dead, led flashes four times. No start. Only 13 months
old. Ideas? Dani.

My Belkin 400 watt UPS has dead batteries. It turns out they are 2 small
12 v batteries in series. I took two motorcycle batteries, wired them in
series  and connected them to the old battery outputs (disconnecting the
old batteries). Seems to work great. There is still a trickle ...

      It looks like the problem is fixed (see below for details).
 This is the first time I have encountered a button switch/s that tested good
(no "leakage" at 50V test),  but turned out to have intermittent "leakage".
     Thanks to everyone who offered their help,  Brad  

Has anyone fixed a late model TV (mfg 2005/2006) with this problem:
You turn on the TV,  after the screen lights up, etc. the TV turns itself off.
About 5 seconds later, the TV turns itself on,  etc.  You have to pull the
plug to stop the off/on cycle.   Sometimes,  you turn on the ...

  PLEASE READ my original post below.
  I have a RCA TV model 27V412T,  chassis  M134C (mfg 01/06) back in my shop,
which I thought I repaired after I replace the remote receiver.  The TV worked
fine for a couple days, then it started all over again.   I removed the remote

Hi This monitor model code GH17LSSBY or model name 171V has power up but
white screen.I checked the power supply.There are few voltages coming
out to logic board(5v,16v)I suspect bad logic board.Is anybody have the
same problem?thanks

I have a 2 qt Sonix IV Ultrasonic Cleaner that has a very weak
cavitation.  I tried the aluminum foil test and it only produced one
perforation in a 10 minute span.  I also observed that it only raised
the water temp about 8 degrees with the heater off.

If anyone knows where I can find said schematic, I would be most
appreciative.  This is not the current Diehard model, it just says "Sears"
on the front.  About 10 years old, I believe.  Maybe slightly less.
Thanks,

Set turns on and may work normally for a few minutes if starting from
cold. Lamp goes out, colour wheel spins down, audio remains, lamp
starts up again. It (the lamp) will continue cycling while audio stays
constant.

This transformer is NLA and appears to have an open primary (internal
fuse) caused by leaky electrolytics. I have exhausted all searches on
the transformer and can't find any specifications. The owner really
would like this repaired and if the spec's were avaialbe (24 Volt