Diode Circuit Boards - Toro Greens Aerator Service Manual

Diode Circuit Boards

The Greens Aerator uses two (2) diode circuit boards
that are located under the console cover (Fig. 21). One
of these circuit boards has three (3) diodes while the oth-
er board has four (4) diodes.
The three diode circuit board (Fig. 22) provides logic for
the interlock system. Diode D3 on this board is not used.
The four diode circuit board (Fig. 23) is used for circuit
protection from voltage spikes that occur when circuit
solenoids are de–energized. Diode D1 on this board is
not used.
Testing
The diodes can be individually tested using a digital
multimeter (diode test position or ohms setting) and the
diode diagrams to the right (Figures 22 and 23). The
diodes should have continuity in one direction and no
continuity in the other direction. If any diode is faulty, re -
place the diode board.
Greens Aerator
1
1. Diode board (4 diode)
DIODE
CIRCUIT BOARD
DIODE
CIRCUIT BOARD
Page 5 – 15
2
Figure 21
2. Diode board (3 diode)
DIODE DIAGRAM
Figure 22
D2
D4
D3
D1
DIODE DIAGRAM
Figure 23
Electrical System