Toshiba Strata DK 280 Installation Manual page 145

telephone base (Figure 5-1), and remove the
base.
2. Depending on the telephone, refer to Figure 5-7,
5-8, or 5-9 and locate the ex,pow straps, W101
and W102. Cut these straps.
3. Reinstall the telephone base, and secure it with its
four captive screws.
Note:
Refer to Chapter 7-Wiring
external AC/DC power supply ordering
information and installation instructions.
5.3.1 0
See Section 5.7 in this chapter.
Electronic Telephone Upgrades
5.4
This section describes how to upgrade and configure
electronic telephones for features and options.
Off-hook Call Announce Upgrade
5.4.1
or
Electronic telephones must be equipped with either
the HVSU2 subassembly or the combined HVSU and
HVSl subassemblies to receive Speaker Off-hook Call
Announce (OCA) calls. These telephones also require
three-pair wiring to receive speaker OCA, instead of
the standard two-pair. Telephones making speaker
OCA calls do not require an upgrade or extra wire
pair.
2. Handset OCA is not available on
electronic telephones.
Install the HVSU2 in accordance with the following
steps:
1. Loosen the four captive screws securing the
telephone base (Figure 5-1), and remove the
base.
Position the HVSU2 on the standoffs inside the
2.
base, and secure with the two provided screws
(Figure 5-12).
3. Connect the HVSU2 wire plug to the
on the printed circuit board (PCB) in the telephone
(Figure 5-13).
1996
January
Diagrams for
Installation
P2 connector
TO HVSU
CONNECTOR (P2)
ON MAIN PCB
INSIDE
TELEPHONE
Figure 5-1 2
Electronic Telephones
Install the HVSU/HVSI subassemblies in accordance
with the following steps:
telephone base (Figure 5-1), and remove the
base.
2. Align the P5 connector on the HVSl subassembly
with the receptacle on the HVSU subassembly
(Figure 5-14). Apply firm, even pressure to the
(they should click).
Note:
Exercise care when assembling the HVSU to
the HVSl to prevent damage to the connector
pins; also, verify that tbe HVSU is aligned with
the silk-screened image on the HVSI.
3. Position the HVSU/HVSI subassembly
standoffs inside the base, and secure with the two
screws provided (Figure 5-14).
4. Connect the HVSU/HVSI subassembly wire plug
to the P2 connector on the electronic telephone
PCB (Figure 5-13).
on
the
,
5-1 1