B747-100/200/300 INSTRUMENT-CLOCK

CLOCK

 

1.  3 CLOCK IN P1 , P3 , P4
2. CLOCK IN P4 GIVES SIG TO DFDAU SO NOT I/W OTHERS                                    (HAS ANALOGE  TO DIGITAL CONVERTOR CIRCUIT)
3. A PULSE CODE GEN GENERATES TIME REFRENCE INSTALLED BEHIND P4
4. CLOCKS HAS FLAG SHOWN IF VOLT BELOW P14 IT CAN BE RESET BY GMT KNOB PULLING