Electronics Forum / Repair / April 2006

Can I replace STK4274 by a STK391-020 ?
Tks...

While displaying dark pictures or faint dark images.
The TVs with this characteristic is working and CRT is not the
problem; purity is excellent and even phosphors.
For example:

Retro look of the 1960s Vox AC30 amp made probably 2004 with lots of SM
digital chippery for effects undreamt of in the 60s.
One 12AX7 , but is it for show only ?
Heaters have an AC supply but the anodes don't seem have any HV components

if any question, please send mail us!!!!!!
Sell high quality HDI PCB (CHINA)
we send pcb by DHL or UPS ( Send to USA About 1 days from china)
Product Name: Printed Circuit BoardPlace of Origin: ChinaFeatures:

Guess this question goes out to the old farts on here.
Back when I started fixing things, in the mid 70's, a guy who was one of
those korean war vets who started fixing tv's in the 60's gave me a bunch
of magazines to help the cause, so to speak.

I wonder if anyone can help - I have a 15 inch lcd tv with digital
freeview receiver. They each have their own power supply adaptor, one
at 12v - 4.2amp and the other at 12v - 1.25amp output. Becauase of the
lack of space where the tv sits I wanted to run both tv and digibox

   Philips TV model 27PT5441/37 ch L04.1UAA  mfg 08/04
 In my shop, this TV will blow the main fuse intermittently when the TV is
plugged in (when the AC cord is plugged into an outlet)  .   NOTE: I don't
have a SM.  Most times, when the TV is plugged in, the fuse doesn't blow, ...

is it a known problem that the driver
on the HF PA board (Power FET) for the
FT-847 rigs develop a leg separation
problem inside it self under the ceramic

I have several  VG150 LCD monitors (model VLCDS21457-1), and all
developed a problem just before the warranties expired.  On a DOS
screen, I noticed that the bottom 1/4 of the monitor screen was
"lost", or appeared blank.

Having trouble with 2 Samtron VCR's. One is a SV C20, the other a SV C90.
The C20 eats tapes when you try to play and the C90 plays fine but when you
try to record it ejects the tape, sometimes it records. Is there something I
can look

I recently acquired an RCA Model WT-501A transistor tester which works on
NPN transistors but not PNP. I need the manual or at least the schematic.
                                   Thank you,
                                                    Dale

Are there any online sites or books on repairing
car audio radios in particular?
Thanks,
Kirk

   I got my 20 months old projection TV for repair last week.
   The estimate was 1200$. CDA
   It cost me ~ 250$ to tell me that the POWER DEFLECTION PCB and the MAIN
PCB have to be changed.

For anyone that might have any knowledge regarding how water temp's are
determined for a front loading washing machine:
My wife is driving me crazy over this.
Claims that when our machine is on "cold" the water is way too warm.

Hi, I just fixed a 19" monitor rescued from the kerb (LICOM N9054LP), and I
got there before the annoying man who goes aroung cutting off all the cables
from appliance did!
Horizontal but no vertical. The Vertical chip was TDA 0472 (couldn't get any