ELECTRIC SYSTEM 777 SERVICE MANUAL
3-8 Published 10-01-2012, Control # 045-08
E-25 80MALS ECA7 Left Front Drum Encoder Channel A 7.5 VDC Plus or 0 VDC Not Moving; 3.5 VDC Moving I/O 4 J12-01
E-26 80MBLS ECB7 Left Front Drum Encoder Channel B 7.5 VDC Plus or 0 VDC Not Moving; 3.5 VDC Moving I/O 4 J12-02
E-27 81MALS ECA8 Left Rear Drum Encoder Channel A 7.5 VDC Plus or 0 VDC Not Moving; 3.5 VDC Moving I/O 4 J12-03
E-28 81MBLS ECB8 Left Rear Drum Encoder Channel B 7.5 VDC Plus or 0 VDC Not Moving; 3.5 VDC Moving I/O 4 J12-04
E-29 AO-3 Spare I/O 3 J10-06
E-30 87C AO-4 Auxiliary. Drum Motor Control
0 VDC Up to 1/3 Handle Movement;
0.96 to 2.19 VDC 1/3 to Full Handle Movement
I/O 4 J12-06
E-31 NC — Computer 12 VDC
E-32 NC — Computer Ground
E-33 DO-33 Spare I/O 4 J12-25-26
E-34 DO-34 Spare I/O 4 J12-27-28
E-35 DO-35 Spare I/O 4 J12-29-30
E-36 87A DO-36 Auxiliary Drum Pump Control Up 0 to 2.8 VDC Engine On; 0 to 2.4 VDC Engine Off I/O 4 J12-31-32
E-37 87B DO-37 Auxiliary Drum Pump Control Down 0 to 2.8 VDC Engine On; 0 to 2.4 VDC Engine Off I/O 4 J12-33-34
Pin # Wire # I/O # Description
Test Voltage
(DC unless otherwise specified)
Connection
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