Re: Samsung BN44-00289B Power Board troubleshooting


UM801S
pin1 > P-GND = O/L
P-GND > pin1 = 600 ohm | 740 ohm on diode setting

Thank u guys i have a starting point....

Re: Samsung BN44-00289B Power Board troubleshooting


Thanks,

Transformer TM801S
pins 5 , 6 = 0.3 ohm

RM890 spec 3 ohm / read 3.5 ohm

DM802 forward 560 ohm / backward O/L

Thanks, it says he found 3 bad diodes that solved his issue...
(zd804, dm852, zm804)

Do my specs look suspect? I dont know how he tested them, im just using a mutimeter ohms diode setting.. and keep in mined my components are still in circuit, i need to acquire a soldering iron.

Im not qualifed to say,...

Re: Samsung BN44-00289B Power Board troubleshooting

Thanks, and no i didn't replace anything yet. I don't know where or what to order yet, but notice caps and diodes are cheap so not sure if i should just replace them all? cause shipping may cost more than the parts? I dont usually do this so i dont have spare parts, and i dont have experience to know the likelyhood if caps or diodes would fix the symptom.

Recommendations on where to order from also since im not ordering large bulks is also appreciated.


[B]CM852[/B] had no exposed pins on top...

Samsung LCD
LN32B360C5DXZA ver.SG05
BN44-00289B Power Board

I get No standby light on tv, and backlight does Not come on with logic board term CN802 disconnected. Im get voltage readings but None at all on CN802 terminal pins.

My component level knowledge is basic, so this will be a lession for me. I id the transistor pins G D S from schematic but got diff readings reversing polarity, idk which polarity is relavant so i took both directions.

Any advice on which direction i should research into first based on the symptom issues is appreciated,...

Re: New Members - please post your introductions here

Hi, i have pc experience from back in winXP days from building and trouble shooting however not at the IC component level. I do have some basic electronic knowledge, but no familiarity with typical component level issues beyond the obvious physical damage or test procedures to account for circuit variables if components aren't desoldered form the board in some cases.. so im here for trouble shooting advice and second opinions to try and salvage what appears to be a seemingly otherwise undamaged lcd tv i found has a psu board...