Samsung 223BW LCD

[Heihachi_73]

My latest victim, a Samsung 223BW LS22MEVSFV/XSA from June 2007. With everyone's favorite caps, of course.

This morning the monitor decided to not even bother coming on, despite being 9°C inside the house. For the last few weeks I had noticed some barely visible fuzzy lines on the odd occasion but nothing out of the ordinary - my previous monitor used to have trouble just turning on when its caps went.

As usual for most electronics this side of the 1990s, the main board is very good quality whereas the power supply is cheap and nasty.

Anyway, after disassembling it I found that not just one or two caps, but the entire batch of large CapXon caps on the power supply PCB had failed, with one of them venting.

Time to get this one back in service as I don't have any other decent LCDs left - I am currently using an 1280x1024 LG Flatron L1710M from 2004 because it was either that or a CRT, and I would rather stay this side of the year 2000!

Anyway, here's a list of the electrolytic caps on the power supply, which is an IP-43130A, datecode 0722.
C105 JH CD266 100uF 450V 105°C
C107 CapXon KM 47uF 50V 105°C
C111 CapXon GL 820uF 25V 105°C BULGED
C112 CapXon GL 820uF 25V 105°C BULGED
C113 CapXon GL 330uF 25V 105°C BULGED
C114 CapXon GL 820uF 25V 105°C BULGED
C118 CapXon GL 2.2uF 50V 105°C
C316 CapXon GL 820uF 25V 105°C BULGED
C317 CapXon GL 820uF 25V 105°C BULGED
C318 CapXon GL 22uF 50V 105°C

As for the rest that aren't bulged, I don't trust those either after what happened to my previous monitor.

[Heihachi_73]

Re: Samsung 223BW LCD

Monitor has since been recapped with what I had at the time, a bunch of 25V Rubycon YKs and a single off-brand (TL brand) pulled from scrap PCBs, the TL was installed in a less busy area, hopefully with less heat (C317). I didn't have any 820uF of anything whatsoever so 1000uF had to do. Monitor is working again and no longer has any fuzzy lines either.

The small caps have been left in place for now, although I will replace them if anything weird starts happening. Apologies for poor quality PCB photo, the component IDs aren't really visible in the image (photo is a "before" pic, I never thought to take an "after" pic).

[CapLeaker]

Re: Samsung 223BW LCD

9°C inside the house? I am a Canadian but, that's too cold for me.

[Heihachi_73]

Re: Samsung 223BW LCD

Yeah, Australian houses are stupid, up to the mid-80s things such as insulation and air conditioning were optional extras (never mind the annoying hot days in summer with northwesterly winds coming straight from the desert and the accompanying 40°C+ with it), so the temperature is usually within a few degrees of the outside temperature. This one was built in 1968 and may have once had insulation, but if it did exist it was probably asbestos and ripped out 30+ years ago when the substance was banned.