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INSTALLATION-TELEPHONE
SECTION 200-096-207
FEBRUARY1991
3) Set the
SW601
switch on the HHEU to
HEADSET for the headset/loud bell applica-
tion (Figure 7-10).
4A) Connect the HESC-65A cable to P601 of the
HHEU if the loud ringing bell option is re-
quired (see Figure 7-10).
4B) If the headset receiver is not to receive OCA,
cut one side of the R607 resistor on the HHEU
(Figure 7-10) and then remove the resistor to
eliminate electrical contact.
5) Position the HHEU PCB on the standoffs
inside the base (Figure 7-10) and securewith
the two screws provided.
6) Connect the HHEU PCB to the telephone’s
upper PCB (Figure 7-l l), labelled DKTl O-
SUB(SPF).
7A) Refer to Figure 7-11, and locate the EXSP,
W305, strap on the upper PCB, and cut it if an
HHEU will be connected to an HESB for the
loud ringing bell option.
COMPONENT SIDE OF HHEU (V.3 or later)
FlGURE7-lo-HHEUINSTALLATION
FOR DIGITALTELEPHONE
.
W401-1020SD
W302-1020H
FlGURE7-II-DIGITALTELEPHONEPCB
CONNECTIONSANDSTRAPS
7B) Refer to Figure 7-l 1, and locate the HHEU
strap, W303, on the upper PCB, and cut it if an
HHEU will be connected to a headset.
8) Reinstall the telephone base (Figure 7-l),
and secure it with its four captive screws.
NOTES:
1. The HESC-65A cable is for lOOO-series
digital telephones and 6500-series elec-
tronic telephones. The HESC-65 cable is
for 6500-series electronic telephones only.
2. If using the HESB as a loud ringing bell,
refer to Section 200-096-208, External
Speaker (HESB) Options, for wiring de-
tails.
4.14 DVSU Upgrade Installation.
Install the off-
hook call announce (DVSU) upgrade in accor-
dance with the following steps.
1) Loosen the four captive screws securing the
telephone base (Figure 7-l), and remove the
base.
2) Loosen the four captive screws securing the
metal plate to the standoffs inside the base
where the DVSU wi,fl be installed (Figure 7-
12). Remove the metal plate, which can be
discarded.
7-9