Hi There!
I am currently trying to repair a TV that I bought (as broken, very cheap) 1 yr ago and tried to repair. It's a 50" plasma Samsung TV. It originally had a "clicking no start condition". There has been 2 phases for this so let me explain:
Past (1 yr ago): TV wouldn't turn on. PS was clicking. Found that after disconecting X board it would start up internally (samsung start up tune) and all power leads (Vs, Ve...) would check good. Found a shorted transistor shorted in the X board so I swapped it (I know it's advised to replace ALL semiconductors, I tried to go cheap). Checked TV afterwards and didn't want to turn on. Got sick of it and left TV sitting for 1 year
Present. Brought the TV back to the bench: First test: Hit power button on remote, relay clicks on, samsung start up tune sounds ok. Blank screen. Remote buttons make the status led blink. In the rear: Vs, Ve...all dead. Only low voltages present (Stand-by, 5.3v...). Actually... Logic board seems dead as no light is on neither blinking.
I realize there's an SMD fuse on the logic board. Checked it, its OPEN. Its marked F2000, F5R (as per datasheet, 5Amps). One lead of the fuse comes from power socket, 5.3V, straight from Power Supply. Other lead checks fully grounded, 0.000Ohm to ground. I start disconnecting all ribbons from logic board one by one and when I disconnect ribbon between LOGIC and X-BOARD, shorcircuit disapppears.
I remove X-board and all the semiconductors in the heatsink have all leads shorted to GND. It seems my repair didn't work...
So, this is my plan, and I would like to hear if this sounds reasonable:
-I have ordered a spare X-Board on ebay (fully checking all markings, 100% exact)
-Instead of getting a new LOGIC board, I'm planning on piggybacking a 5Amp fuse onto the SMD fuse on Logic board, assuming nothing else is blown in the logic board so maybe I can save myself the money to get a full board.
Do you think this all makes sense??
Thanks in advance!!
I am currently trying to repair a TV that I bought (as broken, very cheap) 1 yr ago and tried to repair. It's a 50" plasma Samsung TV. It originally had a "clicking no start condition". There has been 2 phases for this so let me explain:
Past (1 yr ago): TV wouldn't turn on. PS was clicking. Found that after disconecting X board it would start up internally (samsung start up tune) and all power leads (Vs, Ve...) would check good. Found a shorted transistor shorted in the X board so I swapped it (I know it's advised to replace ALL semiconductors, I tried to go cheap). Checked TV afterwards and didn't want to turn on. Got sick of it and left TV sitting for 1 year
Present. Brought the TV back to the bench: First test: Hit power button on remote, relay clicks on, samsung start up tune sounds ok. Blank screen. Remote buttons make the status led blink. In the rear: Vs, Ve...all dead. Only low voltages present (Stand-by, 5.3v...). Actually... Logic board seems dead as no light is on neither blinking.
I realize there's an SMD fuse on the logic board. Checked it, its OPEN. Its marked F2000, F5R (as per datasheet, 5Amps). One lead of the fuse comes from power socket, 5.3V, straight from Power Supply. Other lead checks fully grounded, 0.000Ohm to ground. I start disconnecting all ribbons from logic board one by one and when I disconnect ribbon between LOGIC and X-BOARD, shorcircuit disapppears.
I remove X-board and all the semiconductors in the heatsink have all leads shorted to GND. It seems my repair didn't work...
So, this is my plan, and I would like to hear if this sounds reasonable:
-I have ordered a spare X-Board on ebay (fully checking all markings, 100% exact)
-Instead of getting a new LOGIC board, I'm planning on piggybacking a 5Amp fuse onto the SMD fuse on Logic board, assuming nothing else is blown in the logic board so maybe I can save myself the money to get a full board.
Do you think this all makes sense??
Thanks in advance!!
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