Wheatstone TV-80, Technical Manual

Page: 57 / 120

S T E R E O M A S T E R S
page 4 – 5
TV80 / Sep 98
Master Module Internal Programming
Master Insert Bypass
The module’s electronically balanced STERO MASTER insert
points may be bypassed via PCB jumpers “J4” through “J7”. (See
Technical Drawings SG-80 PCB load sheet, page 53 lower left, and
schematic, page 47 D-5 & B-5).
Sum LED VU
The stereo master module’s mono sum LED VU meter signal may
be programmed pre or post fader via a PCB-mounted slide switch
(“SW13”) on the module’s fader panel main PCB. See Technical
Drawings FPO-80 load sheet (page 64, far left) and schematic (page 61,
B-7). The default setting is “post”.
The Sum LED VU meter may be calibrated by a PCB-mounted
trimpot (“CR1”) on the fader panel main printed circuit board. See
Technical Drawings “FPO-80” load sheet (page 64, left center) and
schematic (page 61, B-6).
Master Module Input/Output Wiring
All wiring for the master modules is via two rear panel DB-25
connectors (see right). Signals include stereo and mono sum master
outputs, external tone in, external tone control lines (upper connector
“A”) and master insert points (lower connector “B”). Note external
tone pins (“external tone” is the stereo master interrupt signal referred
to on page 4-3) are on master module #1 only. See pinout drawings on
next two pages for wiring details.
Printed Circuit Board Load Sheets
Load sheet drawings, showing all part locations, are in the Techni-
cal Drawings booklet (see “Chapter Contents” page 4-1 for specific
drawing locations).
Schematics
Schematic drawings are in the Technical Drawings booklet (see
“Chapter Contents” page 4-1 for specific drawing locations).
NOTE insert bypass jumpers
are normally pre-installed at the
factory. If you intend to use an
outboard processing loop, you
must remove these jumpers.
I
O
I
O
A
B
The module’s two DB-25
connectors (A & B) handle
all input/output signals.