Specifications

C.10 SPSR—Shuttle Power Supply Regulator
WARNING
The input voltage to the SPSM board is 85 V. Exercise care in
troubleshooting this board to ensure personnel safety.
The SPSR board (P/N 29-26732-00) provides all regulated voltages (42 V,
12 V, 5.1 V, and -12 V) required by the printer. Four LEDs indicate the
presence of these voltages.
NOTE
If the crowbar on this board operates, the LG31 must be turned
off for at least 30 seconds before power can be restored.
The SPSR board is located in the power supply card cage (see Figure
C-9).
Fuses: F1 (see Appendix X, LG31 System Fuses)
Controls: R87 - A factory preset adjustment for 5.1V; do not adjust
Indicators: CR25 - Indicates the presence of 12V
CR26 - Indicates the presence of 5.1V
CR27 - Indicates the presence of -12V
CR28 - Indicates the presence of 42V
Jumpers: J1 - Factory set shorted for normal operations
C–16 LG31 PRINTED CIRCUIT BOARD SUMMARY