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black stripes on Displaytech 64128A with KS0108

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Pennywise

Post subject: black stripes on Displaytech 64128A with KS0108

Posted: Thu Feb 19, 2004 13:00

Joined: Thu Feb 19, 2004 12:51
Posts: 2

Hello there!

I have a problem with my LCD:

I wired it like described in 64128A_ver2.pdf from this page. This should be OK, also the solder connections are alright...
The parallel port is on ECP/EPP, like suggested...
I'm using the display with VCC=+5V...

When I turn the display on, sometimes there's nothing to see, sometimes there are black stripes and areas!? The ks0108-Test-Program and LCD-Info v0.3.2 doesn't work...

Can someone help me please?

Robert

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Henri

Post subject:

Posted: Fri Feb 20, 2004 20:11

Joined: Sun May 05, 2002 22:05
Posts: 2063
Location: Lappeenranta, Finland

I remember seeing black stripes with 64128A when the timing was bad. But this was with the first LCDInfo 0.3 versions with KS0108 support when I didn't yet have my own KS0108 display to test.

You should check that all your connections go where they should.

You could also try without the 10K pullup resistors. Personally I've never used those.

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Snake-Dsl

Post subject:

Posted: Sat Feb 21, 2004 23:59

Joined: Mon Jan 06, 2003 20:53
Posts: 3
Location: Germany - Leipzig

The ECP+EEP-mode doesn't work with my (same) LCD. Try to check out the normal mode on on parallel port.

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