Date: Thu, 13 Jan 94 16:35:40 PST
From: ptsfa!dmturne@gw.PacBell.COM
To: bob@cua2.csuohio.edu
Subject: Re: sick swiss mice

In article <1994Jan13.042220.13694@news.csuohio.edu> you write:
>
>	Anyway if anyone has a solution to this little problem I'd love
>to hear it!
>

The mouse has adjustments that you can make to fix this.
You can do it without test equipment but it will take longer.

The following has been posted here (by me) before. If you have more questions
let me know.

dmt


-----

The 5620 (and 630) mouse wiring is as follows:

	pin	use

	 1	+5 VDC
	 2	Y2
	 3	Y1
	 4	X2
	 5	X1
	 6	Ground
	 7	Middle switch
	 8	Right switch
	 9	Left switch

Pins 2-5, 7-9 are normally high (+5 VDC).

Pressing a switch lowers the corresponding pin to Ground.

A common complaint with the RED mouse is that it seems dead (or sluggish)
in one or both directions.

The mouse has two outputs for each direction (x and y);
each of the four outputs has an adjustment.

The signals from each led/photocell connect to a Schmitt trigger.
A control allows the adjustment of each Schmitt trigger input level.

A crude but effective way to do this is to remove the RED mouse cover
and make small adjustments to the corresponding controls until the mouse
works again. With the mouse in the position shown below, the X adjustments
affect the horizontal motion on the screen and the Y adjustments affect the
vertical. A logic probe may also be used to verify the photocell signal and
Schmitt trigger outputs (See below).

Please excuse the crude graphics.


			      TOP VIEW
			   (component side)




                                 MB
                             .       .
                        .                 .
                    LB.                     .RB
                    .                         .
                  .                            .
                                                 
                .                                .
                                                   
              .      Y2                            .
                                                    
                     Y1                             
             .                                      .
             .                 BALL                 .
             .                                      .
               RY2                                   
                                                    
              .    RY1                             .
                                                    
                                                   
                .                               .
                                                
                   .                X2 X1     .
                          RX2                
                       .                  .
                          .    RX1     .
                             .      .

where:

	X1-X2 and Y1-Y2 are optical disk readers,

	RX1-RX2 and RY1-RY2 are adjustment pots for each optical reader,

	LB, MB and RB stand for the Left, Middle and Right buttons.

The Schmitt trigger (MC14584) connections are:

	pin	use

	 1	nc
	 2	nc
	 3	nc
	 4	nc
	 5	Y1 input from photocell
	 6	Y1 output to mouse connector pin 3
	 7	Ground
	 8	Y2 out
	 9	Y2 in
	10	X1 out
	11	X1 in
	12	X2 out
	13	X2 in
	14	+5 VDC


---
Dave Turner	(510) 823-2001	{att,bellcore,sun,ames,decwrl}!pacbell!dmturne