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Service manual
ALX 720
Release 11/2003
Page 33
Step What is wrong
What could be the
reason
How to check it
Action to solve
problem
4c
Defective output
driver UDN2983
Replace output
driver U3 and U4
from socket (Figure
1)
If message
disappears, use only
one driver if the
other one is not in
use
Check external
connection for
reason for short
circuit
4d
Board
failure
Measure
output
voltage terminal 28
against terminal 14
Voltage has to be
22V – 26V.
If not ok, replace
board
4e Error
message
“E_10”
Voltage regulator
defective by over
voltage.
Measure input
voltage of board.
If >28V~ see
troubleshooting
transformer.
4f
Output voltage too
high.
Measure output
voltage terminal 28
against terminal 14.
Voltage has to be
22V – 26V.
If not ok, replace
board.
5a Error
message
“E__5”
Label sensor supply
10V not ok
Disconnect label
sensor
If message
disappears check
sensor and cable
Replace label sensor
5b
Measure voltage on
pin 1 against 5
If voltage <10V
replace board
5c Error
message
“E__9”
Fault 10V regulator
Measure voltage on
pin 1 against 5
If voltage >15V
replace board
6 Error
message
“E__9”
Motor driver fault
Check
connection
cable
See trouble shooting
motor
Summary of Contents for ALX 720
Page 2: ...Service manual ALX 720 Release 11 2003 Page 2 1 Block diagram...
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Page 20: ...Service manual ALX 720 Release 11 2003 Page 20 5 Display Adapter...
Page 21: ...Service manual ALX 720 Release 11 2003 Page 21 6 Dispenser Main Board Generation I...
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Page 34: ...Service manual ALX 720 Release 11 2003 Page 34 Figure 1 Layout CPU board...
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Page 45: ...Service manual ALX 720 Release 11 2003 Page 45 Figure 1 Sensor Print head position...
Page 46: ...Service manual ALX 720 Release 11 2003 Page 46 Figure 2 Centronics cable optional...
Page 47: ...Service manual ALX 720 Release 11 2003 Page 47 Figure 3 RS232 cable...
Page 48: ...Service manual ALX 720 Release 11 2003 Page 48 Figure 4 Sensor Material end...
Page 49: ...Service manual ALX 720 Release 11 2003 Page 49 Figure 5 Cable print head...
Page 50: ...Service manual ALX 720 Release 11 2003 Page 50 Figure 6 Fullsize sensor...
Page 51: ...Service manual ALX 720 Release 11 2003 Page 51 Figure 7 Micro switch...