CAUTION To avoid mismatching screws and holes, keep the screws for each
piece with that piece as you remove modules and circuit assemblies. It is possible
to mistakenly install machine screws in locations intended for plastite screws.
Plastite screws have a Torx-pan head.
Required tools and equipment
• Phillips #1 screwdriver
• T-10 Torx screwdriver
• 3mm hex key
Torque value table
Use this table to determine how much torque to apply to screws by type and location when
reassembling the device.
Description Torque specification Bit type Where used
SCR,4-20X.31 PLASTITE PH TORX
4.5 +/-0.5 in-lbs
Torx Chassis and SpO2 Insert to
Main CSM PCA. Radio/
Bluetooth PCBA to Chassis
SCREW 4-40 .250 PAN PHILLIPS
STEEL ZINC
4.5 +/-0.5 in-lbs
Phillips SpO2 boards
SCREW, M2 X 6 INTERNAL TOOTH
SEMS PHP
2.5 +/-0.25 in-lbs
Phillips Radio PCA to Radio Interface
PCA
SCREW, M4 X 10 PAN HEAD W
NYLOC
7.5 +/-0.5 in-lbs
Phillips Front to Back Housing and
Temperature Module/Dock
SCR, M4 PAN HD, PHD,
SHOULDER
4.5 +/-0.5 in-lbs
Phillips Battery Door
42 Disassembly and repair Welch Allyn® Connex® Spot Monitor