SERVICE (Cont.)

Memory Clock Board (Model MHG)

FIG 64 MEMORY CLOCK BOARD

Location:

The memory clock board is located on the component mounting bracket mounted to the grinder base inside the front access panel.

Test Procedure:

1.Disconnect the grinder from the power supply.

2.Disconnect the wiring harness on the memory board.

3.Check for 5VDC on J1-4 and J1-5.

If voltage is not present as described the memory board is operating properly.

If voltage is present as described, replace the memory board.

Removal and Replacement

1.Disconnect the grinder from the power supply.

2.Remove the front access panel.

3.Remove the two 8-32 screws securing the compo- nent bracket to the grinder base and tilt forward to gain access to the memory clock board.

5.Disconnect the harness from the memory clock board.

6.Remove the two 6-32 nuts attaching the memory clock board to the component bracket.

7.Remove the two spacers from the old board and attach to the new board.

8.Install new memory board using two #6-32 nuts to secure board to the component bracket.

9.Refer to Fig. 65 when reconnecting the wires.

J1-1

MEMORY

BOARD

+5VDC

J1-5

GRN

WHI

RED

BLK

J16-1

J16-5

FIG. 65 MEMORY CLOCK BOARD CONNECTORS

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Bunn LPG-2, G9WD, G2 TRIFECTA, G9-2, FPG-2 Memory Clock Board Model MHG, Disconnect the harness from the memory clock board

FPG-2, G9-2T DBC, G9-2, G2 TRIFECTA, G9 specifications

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