Fujitsu RS232 malfunction?

mpullin

Anyone ever seen activity like this before on a Fujitsu plasma's RS232 port?

NMarkRoberts

Looks like noise to me...

Joe Hebert

NMarkRoberts wrote:

Looks like noise to me...

That would be my guess too although there are an awful lot of nulls. Maybe it's an intermittent cable or maybe the Fuj had a mental breakdown or maybe as Mark said it's just noise.

I assume you are not using a pre-made cable, correct? If I recall correctly, the Fuj has voltage on the handshake lines. If pins 4 and 6 are getting thru to the NI comm port that can cause problems like this since Netlinx uses those pins for RS-422/485.

mpullin

Thanks a lot for your input guys. What do you mean by noise? Something is messing with the wire in the wall?

jazzwyld

Yep...

I've had the pleasure to deal w/ Fujitsu's as well. I've noticed the same spooge from time to time. I think you're just seeing a hiccup in the RS-232. Not everyone makes solid RS-232 protocols...such a pity.

mpullin

There are three other Fujitsus in the same system that are working, so I'm thinking it's either this TV itself, a problem with the cable, or an issue with the card on the NI4000 (not likely).

NMarkRoberts

mpullin wrote:

What do you mean by noise? Something is messing with the wire in the wall?

I'm not an electronic type person but here are some thoughts...

Dry joint somewhere between the NI and the unit (try a different cable?)

RFI (try adding those little black jobs at ?both ends?)

Nasty power supply (try adding a UPS?)

Bad UART in the NI (try a different NI or a different port?)

Bad UART in the unit (try a different Plasma?)

DHawthorne

I've done quite a few Fujitsu's and have never seen that. I would suspect a bad port on the TV or a flaky cable.