Specifications

C.8 SMSM—Shuttle Matrix System Microprocessor
The SMSM board (P/N 29-26733-00) provides interfacing and prelimi-
nary processing with the incoming serial data, and sends information to
the control panels.
NOTE
The SMSI board (mounted on the SMSM board) is part of the
serial interface.
The SMSM board (see Figure C-7) is located in the card cage.
Fuses: None
Controls: None
Indicators: CR4 (LED) - Indicates the microprocessor (8085) is running (the
ALE signal ON)
Jumpers: J1 - Factory set SHORTED for battery backup of non-volatile
RAM
J3, J5, J14, J17, J18, J21, J22, and J25 must be IN.
C–12 LG31 PRINTED CIRCUIT BOARD SUMMARY