View Single Post
Old 07 January 2020, 10:04   #3
solarmon
Registered User

solarmon's Avatar
 
Join Date: Dec 2018
Location: UK
Posts: 852
This should be the schematic for the tank mouse:

(http://www.pavouk.org/hw/en_amigamouse.html)



If the left/right directions - i.e. (H)orizontal is working, but there are issue with the up/down directions - i.e. (V)ertical, that could an issue with:

1. The pins/cable for the V and VQ signals - i.e. pins 1 and 3.
2. The pull up resistors for the V and VQ signals.
3. The logic chip LM339 (Quad differential comparator).
4. The pull down resistors for V and VQ inputs to the LM339.
5. The V optical sender and receiver components.

So you should check these traces/pins/components.
solarmon is offline  
 
Page generated in 0.04520 seconds with 11 queries