TM 5-3810-307-24-1-2
8 BAD DATA TRANSFER BETWEEN DISPLAY CONSOLE & CENTRAL
UNIT, INTERFERENCE PROBLEM
PROBLEM: Error Code "E93/E94" No data transfer to and from console,
interference from crane electric, or console display frozen.
START
Make sure that Data EPROM is plugged into main board socket D5 and System
EPROM is plugged into main board socket D4. Check that EPROMs are inserted
with notch on EPROM to matching notch on socket. Refer to Procedure 2 in Section 11.
Correct?
NO
Place EPROM in correct socket.
YES
Check crane supply voltage to the display console from the central unit at
connection board between X1:33 (ground) and X1:30 (+24V).
Refer to Drawing 2, 3, 21 in Section 10.
Make sure external and internal power supply is
Correct?
NO
correct. Refer to Section 4.
YES
Turn off system power. Check continuity of the receive (RXD) and transmit (TXD) wires between
central unit and display console. Tag and disconnect the wires from X1:31 (TXD) and X1:32 (RXD)
on the connection board in the central unit and X1:3 (TXD) and X1:4 (RXD) on the NT-/AS
(connection) board in the display console. Check continuity of WHT (RXD) and GRN (TXD) wires
from central unit to display console. Refer to Drawing 2 in Section 10.
Check connections and replace cable from central unit
Correct?
NO
to display console, if necessary. Refer to Drawing 2
in Section 10 and Procedure 1 in Section 11.
YES
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G-24 Change-1
