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3. Adding Zener Diodes
Zener diodes are added to the data output circuit as below.
1. Fabricate the diode as shown in the figure below.
Type: RD9.1EB3-T4
C/N: 000-138-700
Fig. 4 Fabrication of zener diode
2. Remove the coat and solder the diode. See Fig. 5.
3. Do the same for other pins and other ports.
2 mm
4 mm
4 mm
4 mm
4 mm
Remove the coat and then solder the anode.
Do the same for other diodes.
J2 J3 J4
Fig. 5 Zener diodes on MAIN board, soldering side