These PCBs store important data such as settings and carriage drive time. Before replacement of enther PCB, the data stored in it is move to the other PCB through

internal communication so that it can be taken over to the new PCB automatically. This is the reason whey the two PCBs should not be replaced at the same time.

If you want to replace both PCBs at the same time, first carry out the procedure "a" and then carry out the procedure "b".

After replacing whth the maintemance controller PCB or maintenance cartridge relay PCB which are supplied as service parts, check that the firmware to the latest

version.

a) Removing the main controller PCB

1) To remove the main controller PCB, open the top cover and remove the roll feed unit, left circle cover, tank cover, left cover, lower rear cover, lower rear left

cover and left rear cover.

See DISASSEMBLY/REASSEMBLY > Points to note on Disassembly and Reassembly > External Covers.

2) Remove all connectors from the main controller PCB.

3) Remove two coin screws[1], interface cover[2] and screw[3] in this order.

4) Remove the ten screws[4] and free the harness from harness guide[5] to remove the main controller PCB[1].

[1]

F-4-104

[1]

[4]

F-4-105

[2]

[3]