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Franc Zabkar Franc Zabkar is offline
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Default Sony SDM-HS74P computer monitor 2nd post. can anyone please help me?

On Fri, 1 May 2009 13:46:27 -0700 (PDT),
" put
finger to keyboard and composed:

The raster comes on for about 2 seconds and then disappears. The power
supply and inverters seem to be one unit. I've ESR'd the caps and
checked for any other obvious things. There are two high voltage
outputs marked 800V 15ma. I measured these with an AC meter and noted
one side was about 650v and the other was over 1kv.I then disconnected
the cables to these two jacks and noted that the 650v output remained
about same while the other one shot up way above 1kv. I'm wondering
now if I may have a bad inverter or perhaps is there a bad lamp? I'm
not sure how to determine that though. Can anyone please point me in
the right direction? Thanks for any help. Thanks, Lenny.


You may be able to substitute each lamp with a 100K dummy load:
http://www.myslotnotes.com/Dummy%20Load.htm

Here is a service manual for your monitor:
http://archive.espec.ws/files/SDM-HS...M000081483.pdf

I don't see the inverter, though. :-(

FWIW, I believe the monitor is a rebadged LG.

According to page 18 of the manual, you could have either of the
following two power PCBs:

6871TPT285C (4x 2-pin)
PWB(PCB) ASSEMBLY,POWER, HS74 CMO, HS94 LPL/AUO POWER TOTAL POWERNET
http://www.mcmelectronics.com/product/6871TPT285C
http://bestbuy.partsearch.com/Part/L...T285C/New.aspx

6871TPT285A
PWB(PCB) ASSEMBLY,POWER, HS74 AUO 2X4PIN POWER TOTAL POWERNET
http://www.mcmelectronics.com/product/6871TPT285A
http://bestbuy.partsearch.com/Part/L...T286A/New.aspx

Here are photos of the IP boards:
http://global.gmarket.co.kr/challeng...code=160493545

- Franc Zabkar
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