Carlos,
The onboard scan converter works fine on my pcm-5822. Did you boot into BIOS
and select NTSC? Are you sure its not configured for PAL or SECAM? Also note
that it seems that the video cable must be hooked up at boot time for the
system to recognize that its in NTSC mode. I have tried comparing the output
of the onboard pcm-5822 scan converter with other scan converters, and I
don't see much visible difference. Either way, you're not going to get very
crisp text on a 6.5" NTSC panel. A couple of weeks ago I tried a 6.5" NTSC
panel running next to my 6.4" VGA panel side by side, both connected to
pcm-5822. The NTSC panel looks horrible in comparison. Its fine for graphics
but terrible for text. If you want an image thats crisp like a laptop screen
you need to go with a VGA panel. NEC NL6448AC20-06 works great, and I can
tell you how to make a cable if you want to try one (see below). But they
are expensive. I have seen the raw panels for $500 but that doesn't include
the backlight inverter and cable. EMJ embedded sells a kit for $800 and it
comes with the panel, backlight inverter, and cable:
http://www.emjembedded.com/cgi-bin/america/setframe.cgi?spec+CEL
This kit is set up for plugging into cell computing boards, so the cable
end needs to be adapted for pcm-5822. The pcm-5822 uses a 44-pin header
for LCD, so basically you can cut the end off the cable from this kit
and solder it onto the end of a 44-pin hard drive cable. Advantech has
pinout info for this display on their web site, but note that their
pinouts are WRONG -- sharing ground pins causes noise and flickering.
I fixed that by wiring mine up this way:
NL6448AC20-06 PCM-5822
Pin Function Pin
1 GND 3
2 CLK 35
3 HSYNCH 38
4 VSYNCH 36
5 GND 4
6 R0 27
7 R1 28
8 R2 29
9 R3 30
10 R4 31
11 R5 32
12 GND 8
13 G0 19
14 G1 20
15 G2 21
16 G3 22
17 G4 23
18 G5 24
19 GND 33
20 B0 11
21 B1 12
22 B2 13
23 B3 14
24 B4 15
25 B5 16
26 GND 34
27 DE 37
28 VCC 5
29 VCC 6
30 N/C
31 DPS 39
Note that its possible to power the backlight from pins on the pcm-5822
LCD header, using either pin 5 or 6 for 5 volts in and pin 3 for ground.
The cable between the CPU and LCD can only go 18 inches length without
flickering. The NL6448AC20-06 display works with the default VGA BIOS
on PCM-5822 (no BIOS modifications required).
Also note that Advantech has a BIOS update file for PVI 6.4" LCDs and
the necessary pinout info. They also sell kits for this display (not
sure what the price is). I did a price check on the PVI 6.4" TFT LCDs
at Tri-M Systems and they had a kit for $500 that included the display,
backlight inverter, and cable (but the cable will likely need to be
custom adapted for PCM-5822)
http://www.tri-m.com/products/primeview/p64cv1.html
-- Doug
Carlos wrote:
> Well, I took a scan converter and hooked it up to the vga and then
> took the rca out and sent that to the 6.5 LCD. The output was clearer.
> There must me something wrong with the RCA out on the 5822. The
> display still looks like there is some sync problems as well. I am
> going to try the scan converter to a better cable to a tv and see
> what the output looks like then. It still could be problems with
> both the rca out and the cable as well.
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