ComputerVoltageSources

I was looking for this display.

Found a page that said "old part number M1632".

Tried that part number, and found one on eBay for $8.

Took a chance and ordered it.

Any comments on the M1632 to L1672 part number connection?

Thank you!

According to this product brochure

http://www.eio.com/dotmatrixlcd.pdf

they appear to be physically the same. However, the critical part is the
location of the Vcc and GND pins. The CVS LCD Support PCB matches the Seiko
L1672 pinout. For the Lumex LCD the Vcc and GND connections must be
reversed.

This Seiko LCD data sheet

http://www.iweil.com/devices/lcd%20drivers/seiko%20manual.pdf

shows M1632 GND on pin 1 and Vdd on pin 2, which matches the LCD Support
PCB. I would also ohm out GND using the backlight connections, just to be
safe.

John Loffink
The Microtonal Synthesis Web Site
http://www.microtonal-synthesis.com
The Wavemakers Synthesizer Web Site
http://www.wavemakers-synth.com

> -----Original Message-----
> From: ComputerVoltageSources@yahoogroups.com
> [mailto:ComputerVoltageSources@yahoogroups.com] On Behalf Of Grant Richter
> Sent: Tuesday, September 04, 2007 1:31 PM
> To: ComputerVoltageSources@yahoogroups.com
> Subject: [ComputerVoltageSources] Discontinued Seiko L1672
>
> I was looking for this display.
>
> Found a page that said "old part number M1632".
>
> Tried that part number, and found one on eBay for $8.
>
> Took a chance and ordered it.
>
> Any comments on the M1632 to L1672 part number connection?
>
> Thank you!
>

John - We've (I've) got mixed schematics in the folder showing
different configurations. Do we want these schematics to show how the
board is routed or how it needs to be current available LCDs? I don't
even remember which is which now. Perhaps we need to remove
everything and post new schematics with notes.

Dave


--- In ComputerVoltageSources@yahoogroups.com, "John Loffink"
<jloffink@...> wrote:

> The CVS LCD Support PCB matches the Seiko L1672 pinout. For the
> Lumex LCD the Vcc and GND connections must be reversed.

I'll update the BOM, which shows the rework.

John Loffink
The Microtonal Synthesis Web Site
http://www.microtonal-synthesis.com
The Wavemakers Synthesizer Web Site
http://www.wavemakers-synth.com

> -----Original Message-----
> From: ComputerVoltageSources@yahoogroups.com
> [mailto:ComputerVoltageSources@yahoogroups.com] On Behalf Of djbrow54
>
> John - We've (I've) got mixed schematics in the folder showing
> different configurations. Do we want these schematics to show how the
> board is routed or how it needs to be current available LCDs? I don't
> even remember which is which now. Perhaps we need to remove
> everything and post new schematics with notes.
>
> Dave
>