Electronics Forum / Repair / May 2004

I need to program a PAL for a project. I have a Data I/O burner, but no
way to convert logic equations to a fuse map to program. Are there any
freebes, or at least something that won't empty my piggy bank?
Steve Richfield, N7VCG

I am trying to repair a Philips CDM-M2 CD reader, which is part of a Philips
Carin 522 navigation computer. It keeps spitting the CD's out without
reading them. The spindle motor never turns. I tried cleaning the lens, but
no help. Does anyone have a service manual for this unit? I ...

I replaced my computer's 90-watt Newton power supply with a 180-watt Fortron
power supply today. I have not added any other new components, so the total
power consumed should not have changed. The new power supply unit (PSU) fits
perfectly in every way except one: The air flow ...

Picked up an HR-S8000U on EBay. Display is very dim but gets brighter on the
right. From the info gathered on a goggle search this seems to be a common
problem with JVC's of this era. I believe the capacitors in the powersupply
will need replacing. When I wrote the seller back ...

looking for a circuit for an old GOW-MACINTOSH
PA AMP model 3G50744

Can someone help me diagnose what is wrong with my 1989 Zenith
television.  The color is geen, but you can see the picture which is
slightly blurred.   And it has horizonel white stripes going through
it.  Is this a tube problem?  If it is a tube problem, can I buy a

My church was recently given a Sharp SF-2035 copier with the 20 bin
sorter and about 10 boxes of toner.  Right now we are having problems
getting it working.
Problem #1

I'm hoping someone here can offer some advice/help.
My husband and I have inherited what has been billed as a "precision optics
manufacturing" company.  I knew nothing about this industry until recently,
and still don't know much.  I've come to find out that we do not do in-house

Please can anyone give me any advice with my BOSE LifeStyle 12 CD
Player? The motor which is used to position the lens keeps turning
even once the lens hits its stop position, so it doesn't recognise
disks and makes a loud "clacking" sound as the gears jump.

Hi I have a DELL D1025HE 17" monitor I need to get the case off to tweak
to the colour balance.
I have removed the 2 screws from the bottom, but am unable to proceed
further as I cannot release what look like clips round the sides. I

I want to make a hot wire cutter to cut forms out of polystyrene or
styrafoam. Can I cut off the molex plug from the end of one of the power
leads of a PSU & use  a black wire/ground and either the orange/3.3v or
red/5V wire ? I have an old 250Watt unit lying about that I thought I ...

A friend gave me this VCR/TV combo made by Citizen model JCTV1595. It would
be Ideal for a course on VHS tapes I'll be taking. The problem is when I
turn it on the power comes on and dies after 2 sec. I've open it and found a
broken belt on the vcr part fixed and the  mechanical ...

I have been chasing round pharmacists after work trying to get /one/
syringe and needle to dispense heat sink.
Blinking flip what a hassle.
The cheek of the woman at the Pharmacists at City Hospital "You'll have

Using a Panasonic CT-27HL14.  I figured this would be a better place
to ask this question...
After 20 minutes, a slight chirping/squealing noise from the rear of
the set will begin.  This can be affected by jostling the set or

Could somebody give me the crossed reference, for the transistor (2sc4231),
2sc1740, and for diode (ERC81).
Thanks in advance
Jacques