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1.4 Theory of Operation
The "Detailed Circuit Description", Section 1.4.2, provides information regarding circuit
operation. This text is included to assist service personnel while repairing printed cir-
cuit boards to a component level. Refer to the schematic diagrams, in Chapter 2,
when reading the "Detailed Circuit Descriptions'.
1.4.1
Block Diagram
The Block Diagram indicates the internal organization of the instrument.
It depicts
several circuit boards, numerous connectors, and a liquid crystal display (LCD). The
Block Diagram is used to gain familiarity with the instrument and to locate malfunction-
ing PC Boards.
To avoid clutter, the number of PC Board interconnects is minimized.
The interconnects shown represent major or essential signal flow and clock connec-
tions.
Power Supply connections for each board are also shown.
1.4.2 Detailed Circuit Descriptions
This section of the manual described the operation of each circuit board assembly.
Refer to the schematic diagrams in Chapter 2.
Included are description for the following circuit board assemblies.
Page
Interface Board
- 0670-00-0885
. ................
1-40
Recorder Board - 0670-00-0386. .....,...........
1-47
Power Supply Board - 0670-00-0374...............
1-48
NIBP Module:
NIBP Pneumatic Board
~ 0670-00-0369
. . ...
1-49
|
Control Board
- 0670-00-0375
..........
1-49
Sa02 Analog Board
- 0670-00-0327.
,.............
1-53
1-39
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