Re: Toshiba plasma 50WP16 wierd double image fault



Thanks, that's a good thought. Not something I have ever done before, so how does one tell that a joint is cracked?

Should I start with the D board given that is the one that failed the Self-Check?...

Re: Toshiba plasma 50WP16 wierd double image fault

So, having taken the back off and taken a good look around, what have I learnt?

1. Surprised that there wasn't more dust accumulated inside after 20 years of use. Sure, the fan blades had picked up some fuzz on their leading edges, but elsewhere it was pretty clean

2. No loose connectors that I could see/wiggle or obvious burnt out components (not that I was really expecting to find the latter given the intermittent nature of the fault)

3. The actual D board part no. matches the service...

Re: Toshiba plasma 50WP16 wierd double image fault

I couldn't see IC9011 in the schematics either

Given the problem is affecting at least 4 of the buffer boards (UR, UC, LR, LC) this points in my mind to a D board problem. The D board block diagram shows it supplying all the lower and upper drive boards, mainly through the discharge control IC (IC9900), but as I have no experience with how plasma sets work this is just an uneducated guess.

I'll take the back off later today to assess it's condition, clean it up and check fans as you suggest

Re: Toshiba plasma 50WP16 wierd double image fault

Thanks for the quick reply. That's the service manual I've been referring to, File No 050-200122 which is dated Oct 2001. My display was actually bought in early 2002, so this manual would have been current for it.

The strange thing is that the manual refers to IC9011 in the self-check section, which matches what I see when I run the test, but then makes no further reference to this IC. Anyway, it suggests I should probably take the back off and check the actual part number on the D board before ordering a replacement,...

My 2001 Toshiba 50WP16 50" plasma TV has, after 20 years of trouble-free service, developed a wierd fault in the last 14 days during normal viewing - with no loud bang or smoke or any other excitement.

Every 15-30 secs the right hand half of the image has a "glitch" for about 1 second before reverting to normal. The glitch has two forms and also depends on the aspect ratio setting (see photos):[LIST][*]16:9 either a) a visible seam between LHS and RHS of impage or b) LHS image duplicated on RHS (photos 16x9)[*]4x3 either a) no image on RHS or b) RHS image offset...

Re: New Members - please post your introductions here

Hi, my name is Piers from London. Been messing around with PCs for many many years, joined this forum to get some help diagnosing a fault with a plasma display. Kind regards