Electronics Forum / Repair / July 2005

I've got 3 (had 4) NCD 20" monitors. Apparently this is the same as the
Hitachi HM-4020-D.
Three of the 3 of the 4 monitors all suffer the same symptoms. They flicker
to a yellow tint for a month or so and then go to a permanent yellow tint.

Doesn't anyone even bother to read some of the recent postings or do a
Google Groups search before asking the same question?
This happens ALL the time.  Take the recent Sony low volume sound
issue.  There has been a thread going for a couple of days with all the

the tv has a rolling problem and the picture pushes to one side some times
if u can fix it its yours i live in bartlett tx 76511 240 e davilla right on
highway 95 right next to the bartlett tire and auto look for the vintage
motorcycle shop sign in the link bellow to find your way ...

The set have resistor r217 burn (ABL line), when power is apply the HV
does not come on and arcing was appening across this resitor, the power
supply was making abnormal noise. so i have decide to replace the
flyback and the resistor (10k 1/8w), then when a turn on the set whit

How should I clean the surface of pcb that has sat around for a long
time and doesn't take solder well (ideally, using materials I can go in
a local store and buy over the counter).

I have replace Q404 (horizontal output)the set has work fine for about
30 minutes and the transistor blown again, i have check all capacitor
and they test ok, the B+ is ok.
Does anyone have any tips on this set.

I am looking for a schematic for the Sony UP-D890 Digital Graphics Printer.
More specifically, the power supply.
There is no DC ouput.  It is working up until the high voltage rectified dc
(~170Vdc).  There is voltage across at the primary of the switching

My stove oven's thermostat bulb broke off, I went to
a parts store and they said I cant buy just the bulb
but, I have to buy the whole part, the thermostat with
bulb. Is this true?

27" Memorex stereo tv model:MT1127,chassis:11AK19-8A (Vestel
chassis,commonly made in Turkey),year:Sept 1999,UL Listed:42GF.Unit has
RCA crt (made in Italy).
There are tons of free Memorex service manual downloads at:

Hi, it has red, yellow, dark blue, light blue and a bunch of speaker
wires. If I hook up red and yellow to +12v and bk to -12v a rattling
sound like a stuck cd happens but the faceplate doesn't light up.
Nothing else connected. Any ideas? It's a free-bee but it looks like

Anyone got a schematic on a Lexicon MRC Midi controller?
I have got two dead ones i have been trying to get going for
customers for awhile. Kind of hard with no prints. Essentially
a one board computer with Z80, 4 rom, static ram, uart,analog

Where can I found the schematics for a MR1502 Olidata Monitor built by Smile
?
I.

I have a carver DTL50 that isn't working properly. Went to the CD Player
repair site and read a whole lot of information. Still, I am a newbie so
please respond accordingly.
Problem

I want to put my motherboard 32-pin PLCC BIOS chips into sockets so I
can hot flash them if they somehow get erased, as many of them have,
but how cam I solder those sockets to the circuit board without special
equipment?  It seems that their surface mount contacts are inside the

I try to repair my jvc television. The 1.25A 125V fuse is blown. I replace
the fuse and the fuse blown again. I search for a burn resistor and i dont'
see anything. I don't have a schematics of the board. If anybody can help me
it would be apreciate.