Specifications

4 Disassembly
86 Series N6700 Service Guide
Step 5. To remove the front panel board, remove the six screws that secure
the board to the front frame assembly.
Step 6. To remove the display module, first disconnect the cable at the P1
connector and the ribbon cable at the J2 connector. Then untwist the
tabs that hold the display module to the front panel board.
Step 7. To reinstall the front panel assembly, perform the above steps in
reverse order.
Removing/Installing the Bulk Supply
Step 1. Remove the blower cover, bulk supply cover, and interface cover as
previously described.
Step 2. Remove the power module from slot #3 in the mainframe. You now
have access to two of the screws that install the bulk supply.
Step 3. Remove the four screws on each side of the front panel assembly that
attach the front panel assembly to the chassis. Slide the front panel
assembly forward and away from the chassis. You now have access to
the remaining screws that install the bulk supply.
Step 4. Use a T20 driver and remove all screws that fasten the bulk supply to
the chassis.
Step 5. For N6700B and N6701A mainframes, slide the bulk supply over so
that you can access the AC and DC cable assembly connectors.
For N6702A mainframes, which have two paralleled bulk supplies,
disconnect the ribbon cable that connects the interface board to the
front panel by gently lifting up on the interface board connector.
Slide the ribbon cable out so that you can access the AC and DC cable
assembly connectors.
Step 6 Disconnect the DC and AC cable assemblies and lift the bulk supply
out of the unit. For reassembly, make a note of the color-coding of the
wires and the pins to which they are connected.
Cable assembly Connected to Pin
Red (DC) +48 V
Black (DC) −48 V
Grey (AC) AC
Red/white (AC) ACC
Green/yellow (AC) ground
Step 7. To reinstall the bulk supply, perform the above steps in reverse.