Flowcharts
Rev A 05/01/01 // SB
190113_A
27
Measure process voltage on the Main Board in the central unit between
MP42 (+5v) and MP0 (ground). Refer to Drawing 4 & 7 in Section 4.
PROBLEM: Error Code “E93/E94" No data transfer to and from console,
interference from crane electric, or console display frozen .
Make sure that the eprom's are correct and plugged into the Eprom Module on
the main board.
Refer to Procedure 2 in Section 5.
Place EPROM in correct socket.
Refer to Procedure 2 in Section 5.
Make sure external and internal power supply is
correct - Refer to Section 3.5 No Display.
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Correct?
Correct?
START
NO
YES
NO
Turn off system power.
Check the continuity of the receive(RXD) and transfer(TXD) wires.
Check continuity between:
· central unit main board X1:5 and console X1:3
· central unit main board X1:6 and console X1:4
Refer to Drawing 2 in Section 4.
YES
Correct?
NO
Check connections and replace cable from central unit to
console, if necessary. Refer to Drawing 2 in Section 4 and
Procedure 1 in Section 5.
Check the H12 (TxD) LED on the main board ON/OFF.
Refer to Drawing 7 in Section 4.
ON
OFF
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