Mc Board - Respironics BiPAP Vision Service Manual

3.2 MC Board

Power
J1
supply
Power fail
Watchdog
power on/reset
Error line
control
Real-time
clock
*
For units built s/n 106000 and above.
**
J4 on units built s/n 106000 and above, J2 on non-upgraded units built s/n 105999 and below.
1062788
The microcontroller-based MC board (Figure 3-4) provides overall system
control. The MC board monitors the activity of all the other system modules
and provides commands to these modules based on user and system input.
The MC board also acts as the bus controller for all subsystem
communications using the intermodule communications bus (ICB).
Microprocessor
Data/
Address
I/O
Figure 3-4: MC Board Block Diagram
main control board
NOTE: The
referring specifically to older boards in
s/n 105999 and below), it is called the
(MCS) board.
BiPAP Vision Service Manual © Respironics, Inc.
Theory of Operation
Intermodule
communications
bus (ICB)
Read-only
memory
Random
access
memory
Nurse call/
remote alarm*
DC RX/TX
RS-232
diagnostic
interface
is generally abbreviated as the MC board. When
non-upgraded units (built
main control subsystem
Chapter 3
J4**
J6
J5
PC RX/TX
J3
3-9