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Main => Main Forum => Topic started by: push2reject on October 04, 2010, 06:08:23 pm

Title: GP-Wiz40 MAX "KB" input
Post by: push2reject on October 04, 2010, 06:08:23 pm

What does the "KB" input do on the GP-Wiz40 MAX?  Just got mine today.  I have not yet hooked it up to a panel.  I didn't find any documentation on the GGG site on the function of this input.  Is it just a hold over from the KeyWiz Max 2.0 which has the same PCB?

Title: Re: GP-Wiz40 MAX "KB" input
Post by: push2reject on October 06, 2010, 01:09:34 pm

*Bump*

Nobody?  I'm guessing the GP-Wiz is less popular than the Key-Wiz.
(I've sent RandyT a PM and an e-mail as well as making this post)

Title: Re: GP-Wiz40 MAX "KB" input
Post by: RandyT on October 07, 2010, 08:23:40 pm

Quote from: push2reject on October 04, 2010, 06:08:23 pm

Is it just a hold over from the KeyWiz Max 2.0 which has the same PCB?

Yep :)

Title: Re: GP-Wiz40 MAX "KB" input
Post by: push2reject on October 07, 2010, 11:50:59 pm

Thanks, I figured as much.  I didn't want to test it by shorting it to ground and blowing the unit.

Title: Re: GP-Wiz40 MAX "KB" input
Post by: dholcombe on March 21, 2012, 12:22:18 am

I am somewhat confused by this PCB as well.

The documentation shows X, S!, Gnd as the last 3 pins

The PCB shows X, KB, S!. as the last 3 pins

http://www.groovygamegear.com/PDF/GP40_Eco_ST.pdf (http://www.groovygamegear.com/PDF/GP40_Eco_ST.pdf)

Is the pin labeled KB on the PCB actually S! and the one labeled S! actually another ground as shown in the documentation. Basically I need to know which is actually S! and which is a 2nd Gnd pin.

Title: Re: GP-Wiz40 MAX "KB" input
Post by: RandyT on March 21, 2012, 01:02:05 am

Quote from: dholcombe on March 21, 2012, 12:22:18 am

Is the pin labeled KB on the PCB actually S! and the one labeled S! actually another ground as shown in the documentation. Basically I need to know which is actually S! and which is a 2nd Gnd pin.

Thanks for pointing that out.  The PCB marking is correct.  The second ground was replaced when the PCB was redesigned to accommodate the KeyWiz MAX 2.0 design.  The second ground was extraneous in the earlier revision, and added only to pad out the terminals to an even number.  You can chain all  of the grounds together and attach them to the single ground connection.

I'll get the PDF updated.