G9Qsn (Read/Write) Pcb Removal; Earth Pad Assembly Removal - NEC D2246 Maintenance Manual

4.2 G9QSN (READ/WRITE) PCB REMOVAL
Follow these steps to remove the G9QSN read/write PCB.
1. Turn off the D2246.
2. Disconnect the dc power supply.
3. Remove the G9QST PCB (see Section 4.1).
4. Remove the four screws that secure the larger air separator (air separator A) to
the drive unit (see Figure 4-3).
5. Lift air separator A straight up to remove it.
6. Disconnect cable connectors J31 and J32 (see Figure 4-4).
7. Lift the G9QSN PCB slightly and slide it away from the earth pad assembly to
remove it (see Figure 4-4).
4.3 EARTH PAD ASSEMBLY REMOVAL
Follow these steps to remove the earth pad assembly.
10 Turn off the D2246,
2. Disconnect the dc power supply.
3. Remove the G9QST PCB (see Section 4.1).
4. Remove the screw that attaches the earth pad assembly to the smaller air
separator (air separator B - see Figure 4-3).
5. Lift the earth pad assembly straight up to remove it.
AIR SEPARATOR B
AIR SEPARATOR A
Figure 4-3 D2246 Air Separators
4-3