Functional
Section 4
Jaguar Audio
page 4.9
3/98
P/N 81905903730
F UNCTIONAL
4
DESCRIPTI ON
The microprocessor controller (U13) is used to interface commands from
the system controller and return status information to the system control-
ler. Communications to and from the system controller are through U6, a
RS485 receiver and transmitter. System timing is provided to the micro-
processor by XTAL1, a 7.3728MHz oscillator. Reset for the microproces-
sor is provided by U7.
Monitor output, input, and level coding is read from S1, S2, and S3 by
U17, U18, and U19 respectively. Two external sync signals are used for
timing switches as set by S4. The external sync can be color black or
composite sync. U8 and U14 decode the composite signal to an even/odd
field signal which is used by the microprocessor.
U4 and U5 comprise the nonvolatile RAM for the processor. C2 provides
memory backup voltage for approximately seven days as long as the
monitor control card is not removed from the Jaguar Frame. CR2 is uti-
lized by the processor on the Output Monitor Control Card to indicate a
CPU fault condition. An external alarm connection is provided by U2. The
external connection can be utilized to audibly indicate CPU fault condi-
tions.
The power regulator circuits on the Output Monitor Control Card are com-
prised of U3 and its associated components. U3 is responsible for provid-
ing a reg5V to the Output Monitor Control Card's electronic
circuits. CR1 provides a visible indication of the health of the regulator cir-
cuits.
4.9 Optional Output Monitor Control Card Continued:
