2-16
The power board can be divided into two parts: AC-DC, DC-DC. AC-DC part transforms the
network source into 15.2V direct voltage. DC-DC part transforms the 15.2V direct voltage
outputted by AC-DC part or lithium battery supply into several direct voltages needed by the
system: 12V, 5.0V and 3.3V. In addition, power board also realizes functions including
power-on/off control, AC indicator light, heating module drive, backlight switch control, and
lithium battery charging management, etc.
When powering on the system, power board CPU detectes the power-on signal, and control the
powering up of 3.3V, 5V, and 12V orderedly. When powering off the system, power down 12V, 5V,
and 3.3V orderedly.
Signal flow when powering on:
Power Board
Power
switch
009-004712-00
Abutting
joint
009-001776-00
Mother
Board
J2-11
12
J10-
11
12
CPU
J3-11
12
Defi
nition of power board J3
Pin No.
Signal name
Description
1)
RXD
received through the communication of power board
series port
2)
TXD
send through the communication of power board series
port
3)
GND ground
4)
LCD-EN
LCD backlight enable signal
5)
LCD-BR
LCD backlight brightness control voltage
6)
3.3VBF
only used for the 3.3V when powering on/off
7)
GND ground
8)
NTC2
Lithium battery 2, connecting to thermistor signal inside
9)
GND ground
Summary of Contents for WATO EX-55Pro
Page 1: ...WATO EX 55Pro 65Pro Anesthesia Machine Service Manual ...
Page 2: ......
Page 34: ...2 20 South African standard ...
Page 48: ...2 34 VPM ...
Page 142: ...4 42 ...
Page 196: ...6 26 FOR YOUR NOTES ...
Page 356: ...8 102 FOR YOUR NOTES ...
Page 438: ...9 82 FOR YOUR NOTES ...
Page 447: ...10 9 10 3 2 Hardware Box 2 4 3 5 7 8 6 12 9 10 13 14 15 1 11 ...
Page 449: ...10 11 ...
Page 455: ...10 17 10 3 5 WATO EX 55 Pro 65 Pro Cart Assembly ...
Page 457: ...10 19 10 3 6 WATO EX 55 Pro 65 Pro Pre pak Circuit Bracket Assembly ...
Page 462: ...10 24 4 3 1 2 ...
Page 473: ......
Page 474: ...PN 046 009688 00 4 0 ...