Vitalcare 506DN3, Руководство по обслуживанию

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Appendix A —Main Board Upgrades
Page A-2 VitalCare
TM
506N3 Series Service Manual Criticare Systems, Inc.
Upgrading the
Main Board
This procedure details the replacement of a pn 91384A001 or
91384A002 Main Board with a pn 91384A003 Main Board.
Removing the old
Main Board
First perform “Disassemble Front Bezel from Rear Housing”
procedure in Section 7.
1. Disconnect the green ground wire from the metal chassis. The
ground wire to the chassis is not necessary with new Main
Boards (pn 93184A003 or newer).
2. Remove the speaker from the rail of the bezel. Lift the orange
and brown wires from the relief of main as shown below.
Figure A-1: Remove Speaker
3. Unplug the speaker assembly (pn 90939A001) from J3 of the
Main Board. Place speaker assembly aside.
4. With a #1 Phillips screwdriver, remove the two (2) screws
(pn 40995B005) holding the ground wire to the Main Board.
Set the ground wire and screws aside. Note the side with the
folded ground tail.
5. Remove the three (3) remaining screws located on the top, left
and middle.
6. Unlock the membrane tail at J11 and remove the tail from the
connector.
7. Remove the assembly from the bezel.
8. Flip the PCB over. Using a #0 Phillips screwdriver, remove all
four (4) screws (pn 41258B003) from the LCD display. Lift and
remove.
Speaker
Ground
Wire
Ground
Wire
Folded
Tab from
Membrane