Toshiba Strata DK40 - Page 193

Electronic Telephone Upgrades Station Apparatus
Strata DK40 I&M Manual Spring 1999
5-21
Refer to the Strata DK40 Programming Manual or DK Library CD-Rom for more details.
1. Loosen the four captive screws securing the telephone base (Figure 5-1), and remove the
base.
2. Using a screwdriver or other suitable tool, remove the plastic tab located on the back of
the base (Figure 5-1). The HHEU modular connector for the headset will be accessed
through this opening.
3. If using a V.3 or earlier HHEU1, set the SW601 switch to the HEADSET position for
HESB and/or headset connection (Figure 5-13). This switch is not on either the V.4
HHEU1 or the HHEU2, because the operation is automatic with these subassemblies.
4. Connect either the HESC-65 or HESC-65A cable to P601 of the HHEU if the Loud
Ringing Bell option is required (Figure 5-9). Refer to Chapter 6 – Peripheral Installation
for HESB installation procedures.
5. For the V.3 or earlier HHEU1: if only the headset is connected to the HHEU, cut both
sides of the R607 resistor on the HHEU (Figure 5-13) and remove the resistor to
eliminate electrical contact.
Note
Do not cut the R607 resistor if connecting an HESB to the HHEU for the Loud
Ringing Bell–even if a headset is also installed on the HHEU.
...or
For the V.4 HHEU1 or the HHEU2: if only the headset is connected to the HHEU, cut
the speaker OCA strap (Figure 5-13).
Note
Do not cut the speaker OCA strap if connecting an HESB to the HHEU for the loud
ringing bell–even if a headset is also installed on the HHEU.
6. Position the HHEU subassembly on the standoffs inside the base (Figure 5-13), and
secure with the two screws provided.
7. Connect the HHEU subassembly wire plug to the P1 connector on the electronic
telephone PCB (Figure 5-11).
8. Cut the HHEU strap on the telephone PCB (Figure 5-11).
Note
The HHEU strap must be replaced if the HHEU PCB is removed from the telephone.
9. Reinstall the telephone base, and secure it with its four captive screws.
Adjust (HESB) Loud Ringing Bell Volume
1. Call the telephone connected to the HESB.
2. Adjust the volume control on both the back of the HESB and the ring volume control on
the telephone.