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Equipment Repairs => PLASMA TV forum => Topic started by: mali67 on November 27, 2012,11:21:02

Title: Samsung PS-50Q96HD with BN44-00189A
Post by: mali67 on November 27, 2012,11:21:02

hi again, i have the samsung with no picture, all voltages are correct except VE which is reading 15v instead of 93v
i have a service manual but cant trace back where the voltage has dropped off.
any ideas would be great thanks

Title: Re: Samsung PS-50Q96HD with BN44-00189A
Post by: mali67 on November 29, 2012,14:19:53

anyone ~? :)

Title: Re: Samsung PS-50Q96HD with BN44-00189A
Post by: jordan on November 29, 2012,15:09:22

VE voltage is only 15V instead of 94V.Fuses on Y-Sus and Z-Sus boards are OK.
REPLACE Y-Main board

Title: Re: Samsung PS-50Q96HD with BN44-00189A
Post by: mali67 on November 29, 2012,19:19:59

with y-main board disconnected shouldnt i still get 194 v ?

Title: Re: Samsung PS-50Q96HD with BN44-00189A
Post by: mali67 on December 06, 2012,04:45:16

cheers for that jordan,#
an update, y-sus main board seems to running (it gets warm and the green led is lit)
X-sus also is getting warm
all voltages seem to be correct
ive checked for any oc fets and cant find any.
the control baord has 2 green leds lit.

Title: Re: Samsung PS-50Q96HD with BN44-00189A
Post by: downunder on December 06, 2012,07:40:26

Try the panel-check test patterns generated on the logic pcb. Will eliminate all boards 'cept the main pcb if patterns are displayed.

Title: Re: Samsung PS-50Q96HD with BN44-00189A
Post by: mali67 on December 06, 2012,15:07:09

Quote from: downunder on December 06, 2012,07:40:26

Try the panel-check test patterns generated on the logic pcb. Will eliminate all boards 'cept the main pcb if patterns are displayed.

how would i do that downunder?
 cheers

Title: Re: Samsung PS-50Q96HD with BN44-00189A
Post by: downunder on December 06, 2012,15:18:05

TV off.remove cable from p/supply to main board and cable from main to logic. Find PS-ON pin on p/supply and cheat it by linking it to ground.On the logic board find pins marked EXT GEN and short them out. TV on.
If p/supply and all scan circuits are operating normally, the tv will display clear test patterns. If it does, main is faulty. If it does not, back to square one.

Title: Re: Samsung PS-50Q96HD with BN44-00189A
Post by: mali67 on December 06, 2012,18:26:33

i cant find anything marked ext gen

Title: Re: Samsung PS-50Q96HD with BN44-00189A
Post by: downunder on December 07, 2012,04:34:48

May not be on all models but very hard to find....I have to use a magnifying glass.

Title: Re: Samsung PS-50Q96HD with BN44-00189A
Post by: mali67 on December 07, 2012,11:11:22

still cant find anything :( maybe someone has a service manual for it ?