Disassembly Procedure; Procedures Overview; Screws - Welch Allyn 53000 Service Manual

5

Disassembly procedure

Procedures overview

These procedures cover monitor disassembly and board removal. Unless otherwise
noted, the assembly procedure is the reverse of the disassembly procedure.

Screws

Following are recommended torque specs for all screws:
Qty Location
4 Battery Door
3 Case
5 Display Board
4 Main Board
4 NIBP Board
4 SpO
2 SpO
2 Printer
1 Printer Board
2 Printer door/roller
2 Temp. Module
4 Temp. Panel
4 Temp Board
WARNING Electrical shock hazard. The battery can deliver currents sufficient to
cause serious personal injury and to damage the monitor. When opening the
monitor for any reason, always remove and disconnect the battery immediately,
before proceeding with disassembly.
Caution Do all repairs at a static-protected station.
Caution Observe recommended screw torque specifications, especially with
screws that secure directly into plastic standoffs.
Caution To avoid mismatching screws and holes, keep the screws for each
piece with that piece as you remove modules, circuit assemblies, and other
components.
Part Number
620-0399-00
620-0399-00
620-0393-00
620-0393-00
620-0393-00
Panel 620-0393-00
2
Board 620-0047-00
2
620-0165-00
620-0165-00
620-0091-00
620-0394-00
620-0393-00
620-0393-00
Type Size/length
Machine #4-40, 5/16"
Machine #4-40, 5/16"
Thread-forming #4-20, 5/16"
Thread-forming #4-20, 5/16"
Thread-forming #4-20, 5/16"
Thread-forming #4-20, 5/16"
Machine #6-32, 1/4"
Thread-forming #2-28, 5/16"
Thread-forming #2-28, 5/16"
Thread-forming #2-32, 3/16"
Machine #4-40, 3/4"
Thread-forming #4-20, 5/16"
Thread-forming #4-20, 5/16"
55
Torque
4 lbf/in.
4 lbf/in.
4 lbf/in.
4 lbf/in.
4 lbf/in.
4 lbf/in.
4 lbf/in.
3 lbf/in.
3 lbf/in.
3 lbf/in.
4 lbf/in.
4 lbf/in.
4 lbf/in.