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112 Technical overview Welch Allyn Propaq CS Vital Signs Monitor
power electronics system
DISPLAY
CONTROLLER
BATTERY
RECHARGER
SUPPLY
BATTERY
MONITOR
POWER
CONTROL
POWER
ADAPTER
+BAT
-BAT
VCHG+
VCHG-
BATT. COMPARTMENT
THERM1
THERM2
POWER
SWITCH
F2
BACKLIGHT_ON/OFF
RECHARGER
BOARD
SHUTDOWN/
LOW_VCC
+VSW
INFREQ_INT/
BATT_TAP
PS_CONTROL
ISO
5.9V
SUPPLY
+VSW
VCC
SUPPLY
+5.00V
NON-ISO
POWER
SUPPLIES
ISOLATED
POWER
SUPPLIES
VCC
T1
PIN7
PIN8
(RS423 POWER)
PIN9
+15V
GND
-15V
IAG
(ISOLATED GND)
ISOLATED SUPPLIES
5.9V SUPPLIES FOR
ISOLATED RS423
T1PIN7
T1PIN9
T1PIN8
DIGITAL BOARD
ANALOG BOARD
PWR_SWT_COM
PWR_SWT_COM
POWER
SYSTEM
DIAGRAM
0696-59
CCFL
SUPPLY
+3.3V
SUPPLY
+5V
SUPPLY
RF_SUPPLY_EN
+VSW
+VSW
F4
F2
DISPLAY,
+3.3V
LOGIC
PCMCIA
CONTROLLER
VCC_OVERVOLTAGE
+3.3V_OVERVOLTAGE
F1
F3