Service manual

2DA/2DB

1-7-3

1-7-3 Adjustment-free variable resistors (VR)

The variable resistors listed below are set at the factory prior to shipping and cannot be adjusted in the field.

•High-voltage PCB: VR201, VR202, VR301

• Drum unit zener PCB: VR1

1-7-4 Remarks on PCBs replacement

Confirm the version of the firmware and upgrade the version in up-to-date state when replacing PCBs.

When replacing the engine PCB or main PCB, remove the EEPROM from the engine PCB or main PCB that has been

removed and then reattach it to the new engine PCB or main PCB.

Figure 1-7-3

EEPROM