Toa EXES-6000, Эксплуатация и устранение неисправностей

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Fig. 31 shows block diagram of the PI unit. One PI
unit is provided with 3 paging-zone outputs in
PI-60 and 8 paging-zone outputs (all call + 7
zones) in PI-62. Designed so that a maximum of 1
(for EX-600) or 2 (for EX-610/620) or 4 (for EX-630)
PI units can be mounted, the EXES-6000 can
have all call plus up to 3 paging zones (for EX-600)
or all call plus up to 15 paging zones (for
EX-610/EX-620) or all call plus up to 31 paging
zones (for EX-630).
In Fig. 31, the paging signal (PAM signal) from
HW-R passes through analog switches and
appears at each zone output (P0, P1-P7). The
paging signal that has reached to P0 also pro-
ceeds to each zone output (P1-P7) through
jumper wire (JW) and becomes an all call.
An incoming paging signal takes 2 separate
courses at each zone output of the PI unit, and
one goes to each output section in the LM unit via
an assignment part of PI-60 (for EX-600) or an
assignment plug (for EX-610/EX-620) or station
assignment unit (SA) (for EX-630) utilized for
users to assign zones for station paging, while
another to a PA amplifier for external paging via
an output transformer. In addition to this, relay
make contacts are provided as output for the PA
amplifier to allow remote ON-OFF operation of
the PA amplifier.
The output P0 is seldom used practically because
it is used for all call purpose. When using 2 or
more PI units, by cutting a jumper wire (JW) on
the second unit or its subsequent units, the
output P0 of the unit can be used as one of zone
outputs.
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