Figure 5-3: Main, Auxiliary, And Display Pcb Assembly - Mallinckrodt Nellcor N-20 Service Manual

Disassembly Guide
5.2.3 Removing the PCBs and Display Assembly
Flex #1
Flex #3

Figure 5-3: Main, Auxiliary, and Display PCB Assembly

1. Remove the Measure button (6) from the main PCB.
2. Remove the entire PCB/Taliq display assembly from the rear cover by tilting opposite the
Battery-Check button (5).
3. Raise the locking tabs on the connectors (11, 12, and 13) to release the cable, on the auxiliary
PCB (26), and remove the three flex display circuits.
4. Separate the auxiliary PCB from the main PCB (27) by pulling the PCB headers apart at the base.
5. Remove the display assembly (18) from the main PCB by unsoldering the four tabs that are
physically bent around the main PCB. These tabs are bent to ensure contact with the ground
plane of the main PCB.
6. Using a long-nose plier, remove the display assembly by untwisting the four tabs (see Detail A
and B).
5.2.4 N-20P Disassembly Procedure
1. Remove the paper door (20) and any printer paper by firmly grasping the paper roll, and pulling
the roll outward from the printer.
2. See paragraphs 5.2.1 and 5.2.2, N-20 Disassembly Procedure, for removal of covers, PCBs, and
the display assembly.
5-4
Tab #1 Tab #3 18
Tab #4
Tab #2
Flex #2
27
11
12
13
26
Detail B
Detail A
6
5