Mindray Passport 5-Lead, Service Manual

Page: 209 / 544

Passport 5-Lead, 5L, LT, XG Service Manual 0070-00-0420 2 - 7
Theory of Operation Block Diagrams
2.2 Detailed Circuit Descriptions
This section of the manual describes the operation of each circuit block. Refer to the
schematic diagrams in Chapter 2.
Included are descriptions for the following Circuit Board Assemblies:
Circuit Descriptions ..................................................................... Page
2.2.1 Interconnect Board .......................................................... 2-8
2.2.2 Frontend Board/Daughter Board ..................................... 2-10
2.2.3 SpO
2
Board ..................................................................... 2-26
2.2.3.1 Masimo/Nellcor SpO2 Interface Board .......................... 2-35
2.2.4 CPU Board ....................................................................... 2-40
2.2.5 Line Battery Board ........................................................... 2-49
2.2.6 +12 / -23.5 Volt Converter Board .................................... 2-54
2.2.7 Planar EL Panel Board ..................................................... 2-55
2.2.8 CO2 Interface Module ...................................................... 2-57
2.2.9 NIBP Module: NIBP Pneumatic Board ............................... 2-59
2.2.10 Panel Board / Display Interface ..................................... 2-63
2.2.11 Termination Board ......................................................... 2-66