NEC Electra Elite 192, Hardware Manual

Page: 237 / 369

Electra Elite Issue 6
System Hardware Manual 5 - 91
6.1.3 LED Indications
The front edge of the ETU has 13 LEDs. (Refer to Figure
5-52 ACD(8)-U10 ETU .) LEDs CH1~CH8 indicate the port
status as follows:
On Port Busy
Off Port idle or not used
The Live LED is red when ETU is receiving power.
The MB LED indicates the status of the MB switch.
The DOS (BIOS) LED is red when a BIOS error has
occurred.
The Bicolor (BCLR) LED indicates application status as
follows:
Red DOS started (ACD application not
ready)
Green ACD application is running
The hard disk drive (HD) LED flashes red when HDD is
active.
Do not reset the ETU while the HD LED is flashing.
6.1.4 Connectors
The ACD(8)-U10 ETU has two connectors:
J9 Connects to the backboard
9-pin RS-232(COM1) Local Serial connector for
direct connection.
6.1.5 Installation Precautions
The ETUs make extensive use of CMOS technology that is
very susceptible to static electricity.
Static discharge must be avoided when handling
ETUs.
Always use the following precautions:
Wear a grounding strap anytime you handle the ETU.
Make all ETU DIP switch setting changes before
inserting it in the KSU. Ensure that Make Busy switch
is off.
Carry ETU in a conductive polyethylene bag to
prevent static electricity damage.