Electronics Forum / Repair / September 2007

chassis number ITC008, set works for hours, & then just goes to a
raster of noise, but not snow.
change the channel and it's fine for a while. it may work fine for 5
or 6 hours. sometimes it just shuts off with the power led still on.

Can anyone tell me where I can find a replacement LCD inverter for a
portable DVD player?
The player is a Yamada / UMax PDiX-770
The LCD panel is a 7 inch, single lamp model A070FW03 V1 - I believe

Reported as fuzzy sound on the bass guitar E string even at relatively low
levels
but otherwise fine sound rendition or backing off the bass control .
Feeding a signal generator in then indeed a distinctly fluttery distortion

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After verifying vertical def signal and retrace were good, looked into
the power down circuit for loss of vertical. Found a pad lifted at
Q-211 collector. Read 4.5V at Vdef test pin, but nothing at collector
of Q-211. Anyway power down repaired. Now, with set powered up, I get

I have taped a program on my VCR and when I viewed it the sound was
not of the program that I taped.  How can I disconnect MTS/SAP on my
T.V.

I have a BOSS HC-2 hand clapper that is broken
The problem is that it makes crackling noise when I touch the pcb.
Since the audio connecters are wired to the pcb it crackles whenever
the cord is touched.

model number Q 2770 lack of red on the screen, replaced the crt board,
with one from a working tv, but after finding r 936 open (220 ohms),
picture is still lacking red, & I ca't find any resistors open, or
leaky, or shorted diodes, or drive transistor. What could it be?

Does anyone know a technique or product to clean grease from cables,
electronics, metal parts and plastic components ? We receive a lot of
different components from clients, who all use grease. So before we
service the equipment, we have to clean it all, and it takes a lot of

Hi Group, I am working on a RCA TV #F32645, CTC203CH3 it was a dead
set, I replaced the flyback, hot, and the vert. output u14501, the set
came alive, ok, now the color is missing, it is in basicly black &
white, there is some color, but it is very very very very faint, i

Black horiz. lines about halfway down then more at bottom with some vertical
foldback.
Could it be a cap somewhere in the vert. output section? Thanks.
MrTobor

Newbee here. The wall wart charger for my rechargeable vacuum failed.
It's rated 24VDC 250MA. I decided to open it up and see what's inside.
Just a transformer, a capacitor and 4 zener diodes. Very simple
circuit. Anyways I made an educated guess that the capacitor had

Label just says Wickes DE44GY
I'm not familiar with these
Someone wanted me to look at their "cooler" which had packed up.
The fan had worked loose, sorted out. Checking it out, the evaporator was

Just wondering when the confusing usages of diminutive names
crept into English (by the English), such as 'tranny' for
I presume transistor or perhaps transformer?, 'addy' for
I presume address, 'proggy' for I presume program ,etc.

I am looking for a schematic for a Belkin F5C520 UPS.
In case you are wondering and/or can help, output voltage for charging
the battery is only coming out at 2.4 volts with the battery unhooked
from the circuit.