Bunn G9-2T DBC - Manual (Page 36)

36
SERVICE (Cont.)
FIG 32 BATCH SELECTOR SWITCH
Location:
The batch selector switch is located on the left front
of the hopper housing.
Test Procedure:
1. Disconnect the grinder from the power source.
2. Open hopper lid and loosen four screws inside the
hopper and remove hopper.
3. The ORN wire is connected to the common terminal
"a" on the rear of the switch.
4. The TAN wire for the SMALL selection is connected
to terminal 1, the GRY wire for the MEDIUM selec-
tion is connected to terminal 2, the PNK wire for
the LARGE selection is connected to terminal 3.
5. Remove all wires from the switch terminals.
6. Set the switch in the SMALL position. Check for
continuity between terminal "a" and terminal 1.
7. Set the switch in the MEDIUM position. Check for
continuity between terminal "a" and terminal 2.
8. Set the switch in the LARGE position. Check for
continuity between terminal "a" and terminal 3.
P787
FIG 33 BATCH SELECTOR SWITCH TERMINALS
Batch Selector Switch (Model FPG)
P2947
TAN to POTENTIOMETER
GRY to POTENTIOMETER
PNK to POTENTIOMETER
ORN to TIMER
If continuity is present at all positions, the switch is
operating properly.
If continuity is not present at any position, replace the
switch.
9. Refer to the Fig. 33 when reconnecting wires.
Removal and Replacement:
1. Disconnect the grinder from the power source.
2. Remove the four 8-32 screws attaching the rear
access panel and move aside.
3. Remove all wires from the batch selector switch
terminals.
4. Loosen the setscrew on the switch knob and remove
the knob.
5. Remove the nut and lockwasher attaching the switch
to the hopper housing.
6. Remove the 6-32 screw attaching the switch to the
hopper housing.
7. Remove and discard the old switch.
8. Refer to Fig 33 when reconnecting wires.
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