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24 160 19_0106E_Rev D.doc / 2005-06-27 / rk.
12. DATA TRANSFER CENTRAL UNIT <--> CONSOLE
Measure process voltage on the Main Board in the central unit between
X1:1 (+UB) and X1:3 (ground). Refer to system wiring diagram.
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 EPROM installation procedure.
Place EPROM in correct socket.
Refer to EPROM installation procedure.
Make sure external and internal power supplies
are correct - Refer to "No Display" Section.
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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 X1:8 and console X1:3
· central unit main board X1:7 and console X1:4
Refer to system wiring diagram.
YES
Correct?
NO
Check connections and replace cable assembly from central
unit to console. Refer to system wiring diagram.
Check the H1 (TxD) LED on the main board ON/OFF.
Refer to main board drawing.
ON
OFF
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