Power Up Sequence Description; Power Down Sequence Description - GE LOGIQ P3 PRO Service Manual

GE
D 5308917-100, R
IRECTION
5-1-9-1

Power Up sequence description

5-1-9-1-1 Overview
The Power Up sequence can be divided into the following steps:
1.) Switch ON the mains on the Power entry module.
2.) +5V standby is provided to SOM/MST.
3.) MST detects contact of the Power ON button and provides input to SOM and the power supply
5-1-9-2

Power Down sequence description

5-1-9-2-1 Overview
There are two ways to switch off the system:
1.) Select shutdown from the Application.
2.) Keep the Keyboard ON/OFF button pressed for more than 4 seconds.
Keyboard
power button
pressed
NO
for < 4 secs
Shutdown
message
MST/SOM
Blue
color indicates Power On sequence
Red
color indicates Power Off sequence
5-10
PROPRIETARY TO GE
8
EVISION
unit, which will power ON enabling the 12V and 5V to the entire system.
If
ON
YES
PS ON = LOW
PS ON = HIGH
Figure 5-8 On/Off Sequence
Section 5-1 - Overview
PS ON = LOW
PDB
BOARD
Buffer
Power Supply Off
LOGIQ P3 S M
ERVICE ANUAL
Power Supply
+12V, +5V = ON
System
Voltage = ON