Installing Pcbs; Central Processing Unit (Cpu) Pcb; Installing The Cpu - NEC DS2000 Hardware Manual

Installing PCBs

Installing PCBs

Central Processing Unit (CPU) PCB

The CPU PCB (Figure 2-1) provides:
G
The system's central processing, stored program and memory for the customer's site-specific data.
G
PC Interface Card.
G
Conference circuits, DTMF receivers and DTMF generators.
G
External music input and on-board synthesized music source.
G
External paging output and associated relay.
G
Real Time Clock.
G
Battery for short term (14 day) backup of the customer's site-specific data.

Installing the CPU

The CPU PCB installs in the CN0 slot in the Main Equipment Cabinet.
To install the CPU PCB (Figure 2-2) (Figure 2-3):
1. Slide the Mode Switch to the RUN position.
2. Insert the battery into the battery clips.
3. Plug the CPU into slot CN0 .
Refer to Section 4, Optional Equipment for instructions on
connecting the music source, External Paging, and the auxil-
iary relay.
2-2 N Section 2: PCB Installation
Figure 2-1: CPU PCB
Mode Switch
Figure 2-2: Setting Up the CPU
Battery
DS2000 Hardware Manual