2HA/2HB
1-6-2
1-6-2 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 PWB: VR201, VR202, VR301
Drum unit zener PWB: VR1
1-6-3 Remarks on PWBs replacement
Confirm the version of the firmware and upgrade the version in up-to-date state when replacing PWBs.
When replacing the engine PWB or main PWB, remove the EEPROM from the engine PWB or main PWB that has been
removed and then reattach it to the new engine PWB or main PWB.
Figure 1-6-2
EEPROM
EEPROM
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