GE
D
IRECTION 5535208-100, REV. 2 LOGIQ E9 SERVICE MANUAL
5 - 28 Section 5-7 - Power distribution
5-7-4 Power Down Sequence description
5-7-4-1 Overview
There are three possible scenarios for Power Down of the LOGIQ E9:
• Power Down - normal power down (short push)
• Enforcement Power Down (long push)
• Power Loss
Each of the scenarios are described below.
5-7-4-2 Power Down
1.) BEP detects short-term contact of Power Switch.
2.) BEP OS dialog box prompts user for power down.
3.) BEP, via PCI express, commands the GFI or MRX to stop scanning, disconnect TX circuits from
TS, stop strobe TS_ON_STRB.
4.) BEP, via USB, commands Power Supply to shutdown TSV1 and TSV2 (SetTxPS 0x68).
5.) Controller turns OFF PMX voltages.
6.) BEP, via USB, commands Power Supply to shutdown card rack (RackPower 0x6A).
7.) BEP OS performs shutdown.
8.) BEP sends PSON_N high to Power Supply.
9.) Controller turns OFF TS voltages.
10.)Controller TS_OK output signal goes low.
11.)Controller turns OFF PMX voltages.
12.)Controller turns OFF voltages +/-15, +/-6, +11V, +24V.
13.)Controller turns OFF +48V.
14.)Controller output 48V_OK goes low.
Figure 5-18 Power Down Sequence
Shutdown
TSV1 and
TSV2
BEP OS
shutdown of
HD and
peripherals
Shutdown all
power supplies
except 48V
GFI
or
MRX
Main Power Supply BEP
Short-
Push
Power
Sw.
USB SetTxPS
PSON_
N False
GFI Stop
and TX
Dischage
Shutdown all
power supplies
USB
RackPower
PSON_N
PCI
Shutdown
Card Rack
OS dialog box
Stop Scanning.
Disconnect HV.
TS_ON_STRB false.
Shutdown
PMX Voltages
To Next Page
Loading...
Need help?
General
