Pctu Installation Procedures - Toshiba Strata DK24 Installation And Maintenance Manual

All PCTU
Types
FIGURE 6-3
DTMF RECEIVER UNIT (CRCU) INSTALLATION
3) Apply firm, even pressure to CRCU to ensure
proper mating of connectors.

3.20 PCTU Installation Procedures

3.21 Install the PCTU in accordance with the fol-
lowing steps:
CAUTION!
Do not remove plastic insulating shield
from back of PCTU PCB. If the shield comes
off, do not allow the back of the PCB to
contact metal.
1) Remove the PCB from its protective packag-
ing.
2) Set the PCTU P1 switch to the ON position
(PCTU1, 2 only, not on PCTU3, PCTU4, or
PCTUS).
3) Set the PCTU P7 battery strap (BATT) to the
ON position.
J2
J1
P3
P2
6-5
CRCU (-4 or -8)
J3
P9
P8
ROM
(2 each — PCTU4)
(4 each — PCTU 1, 2, 3, and S1)
Located under CRCU
NOTE:
The PCTU is shipped from the factory with the
P7 battery strap in the OFF position. Ensure it
is moved to the ON position when installing
the PCTU to protect customer configuration
information stored in the PCTU RAM.
4) Ensure the PCTU has been configured for the
appropriate hardware options (refer to Para-
graph 3.10).
IMPORTANT NOTE:
The power supply must be OFF when in-
stalling the PCTU PCB.
5) Insert the PCTU into Slot 00, labeled PCTU,
and apply firm, even pressure to ensure proper
mating of connectors.
NOTE:
Ensure the component side of the PCTU is
facing right when installing it in the KSU.
INSTALLATION-PCB
SECTION 400-096-206
SEPTEMBER 1992
J4