STEP EXCITE: Service & maintenance manual - rev. 1.4
Page 6.24
6.11. THE MACHINE DOES NOT READ THE TGS
The machine displays this error if the TGS reader is not working properly, or if it is not supplied by
the display board.
THE MACHINE DOES
NOT READ THE TGS
Does the supply voltage
correctly reach the input to the
TGS reader?
Is the supply voltage correct at
the output to the display board
correct?
Replace cable CBQ-32
1
2
YES
NO
YES
Replace the display board
NO
A
Is the serial communication link
between the display board and
the TGS reader OK?
Replace the TGS reader. Is the
communication link between the
display board and the TGS
reader OK?
TGS reader def ectiv e
3
3
YES
NO
YES
Replace the display board
NO
A
Replace the TGS reader
Follow the procedure step by step to correctly diagnose the problem. Take particular care with the
checks highlighted by circled numbers, which are described in detail below:
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