Hello
Sorry for recovering this old thread but it seems similar to my problem.
# i have not found any other threads like this, neither in german nor english
in the near past my picture gets an east-west cushion.
resolution while working 1440*1080 (4:3) and ingame 1024x786.
the first occurrence was ingame
If i lower the width the picture stays nearly constant (OSD width=80).
if i go further than 90 it starts the cushion.
first i attached a fan outside on the top of case to blow of the upcoming warm air
but that doesnt helped. Then i attached it inside the metallic case - no change.
these minutes the case is open and a fan is blowing on the metallic case a the tube
and i seems to be more stable.
the voltages around T601 with 210/81/14/-14/29 are stable (210 is here 207, same
as the mate before has measured). C's looks good - none inflated or leaking.
i have found the right service manual after a longer search, free download here.
http://elektrotanya.com/samsung_syncmaster_959nf_aq19nscu.tar/download.cgi
(they have many more)
unfortunately i only have a digital multimeter, i dont own a oscilloscope.
but i have some experience with the repair of some older tv.
my thoughts are more that direction that the east-west voltage is somehow injured,
not that high as needed - i need to push it up.
to mention - i already renewed lots of solder on the back side so a cold solder
joint there is not really possible. (but it is possible at the case at the tube.)
hmm, i startet the nokia monitor tester - the right side is a bit condensed.
but only the right half side of the circle...
(you can grab it here, its multi lingual:
http://www.chip.de/downloads/Nokia-Monitor-Test-1.0.0.1_13000336.html
)
same question as before - is 207 also good or has it to be exactly 210?
if i have a look at the other voltages i would say - must be 210!
so the parts around C646 are not in good shape.
i have the schematics printed out here (same for this thread) so its easy to mark
and repair, i also have a second spare monitor (17" only) here.
i have some questions to your answers:
1. a defect in the pincushion correction (also known as E/W correction)
2. a defective S-correction capacitor
3. a defective MOSFET that switches the S-correction capacitor
4. Insufficient B+ voltage (horizontal scan supply voltage)
1. is that more electronic or more hardware (eg. coil)?
2. where to search?
3. same as 2. where could it be?
4. 207 or 210 volts?
the parts R649/R655 (each 470E, 1/2 W), D650, C649, R656 - which function
parallel to D647?
Same question for C462|R463 and C463, C464-R465 (all page 3 on PDF E.16).
Last results in Q454 which is connected again to +210V.
And thats the point i should have an OSC to measure the diagram [3] there. :/
# my board does not look that dark brown like the picture above
#1
while i write over half an hour the picture is stable with OSD width=80.
wow IC601 on the other side of the T601 supply is really hot (its with the alu cooler),
can only touch it for 1/2 seconds. is that normal?
#2
service manual mirrored here, ~8megs ZIP, contains 10 PDF files
**broken link removed**
schematics only, 1meg ZIP, contains E.16
**broken link removed**
##
is that allowed according rules?
otherwise i move the upload. sorry for inconvenience
#3
i know that TFT is state of the art, but i used to have CRT and play on CRT (unreal).
and i dont own the money for month to buy me one.
any cheaper help is really appreciated before i decide to buy some used CRT again.