Wheatstone TV-80, Technical Manual

Page: 97 / 120

A P P E N D I C E S
TV80 / Sep 98
Appendix I
TV-80 Console Internal Wiring Paths
As previously stated, most mainframe positions on a TV-80
console have three active sections: the main module itself, an
(optional) overbridge preselector panel, and an associated fader panel
directly in line with and below the main module (the two being
separated by the console’s alpha-numeric source display strip).
Main Module PCBs to Fader Panel PCBs
Main input modules plug (via upper and lower 120-pin edge
connectors) into motherboards (MBM-1000 PCBs) mounted in the
bottom of the console mainframe. Two 20-pin ribbon cable connec-
tors at each slot location on the motherboard pick-up those signals that
must connect to each position’s fader panel.
EXAMPLE: see page 111 of the Technical Drawings,
main motherboard load sheet (lower left) and schematic, page
118, where CT49 and CT41 (20-pin ribbon cable connector
sockets) pick up fader signals from CT32 (lower 120-pin
edgecard connector socket). The two ribbon cables then
thread through openings under the console’s alphanumeric
display strip, where they plug into mating sockets (in this case
C17 and C15) on the fader panel’s motherboard (MBF-1000
PCB; see LOAD SHEET, upper right, page 122 and SCHE-
MATIC, left half, page 123). The mating sockets then parallel
the signals to the fader panel’s 120-pin edge card connector
socket.
Main Module PCBs to Meterbridge VUs
Individual module VU signals route (via main PCB edgecard
fingers) to mainframe motherboard PCBs, where they are carried via
ribbon cables to their respective meters. See Technical Drawings,
page 132 “Mainframe Meter Wiring” for more information.
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