I bought an used Samsung 191T: it's a 19" with one of first Samsung PVA panel, manifactured in late 2002. This is the model with the embedded psu (there was one with an external 14 V brick) and pivot capabilities.
Following Wizard's avice, I opened it looking for badcaps:
Rear plate:
From left to right: inverter, power and logic boards:
The logic board, based on the Genesis GM5020: most caps are Samyoung polys (or fake polys, who knows?), the two lytics near the Genesis are two Samsung FX 47 uF 6.3 V. Noone bulging.
Power supply board: full of CapXons but surprisingly noone bulging again. The primary cap is a CapXon KF (can't read any marks, I suppose a 470 uF 400 V cap), the ones in the upper left corner are KMs (5 1000 uF 10 V and one 470 uF 25 V), below the main thansformer there are two small KMs and, hidden by the right heatsink, the last small KM. All caps are manifactured between 44th and 48th week of 2002: are they still inside the bad electrolyte manifacturing period or not?
The inverter board with only a cap: of course it's the bulging one!
The insulating paper is burnt: the inverter must run hot, no wonder the cap is failing.
Can't read any brand, but it's a 220 uF 25 V cap with green jacket and gold writings; the vent is a three-pointed star with a small marks between each two radius: according to capacitor.web it should be a Teapo or a Tayeh, more likely to be a Teapo. What a luck!
Any idea about a replacement for the bulging cap? Apparently the backlight has not an issue, but I would replace the c[r]ap before having to replace the whole inverter board.
Zandrax
Following Wizard's avice, I opened it looking for badcaps:
Rear plate:
From left to right: inverter, power and logic boards:
The logic board, based on the Genesis GM5020: most caps are Samyoung polys (or fake polys, who knows?), the two lytics near the Genesis are two Samsung FX 47 uF 6.3 V. Noone bulging.
Power supply board: full of CapXons but surprisingly noone bulging again. The primary cap is a CapXon KF (can't read any marks, I suppose a 470 uF 400 V cap), the ones in the upper left corner are KMs (5 1000 uF 10 V and one 470 uF 25 V), below the main thansformer there are two small KMs and, hidden by the right heatsink, the last small KM. All caps are manifactured between 44th and 48th week of 2002: are they still inside the bad electrolyte manifacturing period or not?
The inverter board with only a cap: of course it's the bulging one!
The insulating paper is burnt: the inverter must run hot, no wonder the cap is failing.
Can't read any brand, but it's a 220 uF 25 V cap with green jacket and gold writings; the vent is a three-pointed star with a small marks between each two radius: according to capacitor.web it should be a Teapo or a Tayeh, more likely to be a Teapo. What a luck!
Any idea about a replacement for the bulging cap? Apparently the backlight has not an issue, but I would replace the c[r]ap before having to replace the whole inverter board.
Zandrax
Attached Files
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thank you scenic you are the best.
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