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2.1 Control Knobs and Switches on Main Unit
2 - 8
2.1.7 System Power Distribution Board
Figure 2.1-7 shows an external view of the system distribution board located in the back of the
main unit.
Fig. 2.1-7 System Power Distribution Board
• MAIN ELB: Main breaker. At starting turn it ON. Turn it OFF for a complete shutdown.
• FFB1 STAGE: Breaker for the power for the Type II stage control unit. This breaker, which
is not required for a Type I stage, should normally be turned OFF.
• FFB2 DISPLAY: Breaker for the display power supply unit. Normally this remains ON.
Turn it OFF for a complete shutdown.
MAIN ELB
FFB1 STAGE
FFB2 DISPLAY