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Page 8
ML-116 SYSTEM BLOCK DIAGRAM
A.........
There are two types of wallplates
available for use in the ML-116 system , membrane
and LCD. Both control all wallplate functions. These
functions include Music Selection, Room Mixer En-
able, Music Enable and Volume, and Local Input
On/Off and Volume.
B.........Each room in the system can have two
wallplates if desired.
C.........
The ACU (audio control unit) is the
main unit of the system. It routes the selected mu-
sic, adjusts levels, combines rooms, handles com-
munications (between wallplates, map, and moni-
tor panels), and can talk to other Ml-116s. It also
controls the paging function.
D.........
The HT-8 is a PC board assembly
with 8 relays to control the speaker feeds to the head
table locations. These cards are driven by the
HTBC board.
E........ The PSA Power Supply for the ML-116
system.
F........ The Monitor/VU Panel permits an operator
to monitor the audio from any selected room. It also
permits the operation of any wallplate function from
this same panel.
G........ The Monitor Relay Card is a PC board as-
sembly of relays that mounts close to the power
amps and provides the audio feed for the monitor
panel.
H.........This wall plug-in transformer powers the
HTBC and HT-8 cards.
J........ The HTBC Board is essentially a break-out
that accepts power and signal input and drives the
HT-8 cards.
