GX-A/GF-A Maintenance manual
Page 11
4. Corrective Maintenance
Perform corrective maintenance for the GX-A/GF-A series by referring to the maintenance
flowchart and the troubleshooting table. The troubleshooting table describes the possible
cause and solution to facilitate corrective maintenance.
Perform corrective maintenance according to the error (the letters refer to nodes on the
maintenance flow chart):
Type A: Replacing, disassembling, or assembling the force motor unit
Type B: Replacing or adjusting electrical parts
Type C: Initializing the electric board and inputting specific data
Type D: Adjusting the characteristics of the force motor unit
Type E: Inputting temperature data
Type F: Performance test
Type G: Performing drift check
Type H: Replacing the main board
4.1 Troubleshooting Table
The following troubleshooting table describes the possible cause of, and the solution to
problems.
Problem
Cause
Check
Solution
Type
No
display,
beam is
not
balanced
AC adapter
Is it the correct AC adapter for the
power source used?
Replace with the correct AC
adapter.
F
Is the output voltage correct? Measure
the output voltage of the AC adapter
when it is connected to the balance.
The DC output should be at least 11
volts, but no greater than 22 volts.
If the output voltage is not correct,
replace the AC adapter.
F
Power supplies of
main board
and
display
board
Is the output of each power supply
correct? (Refer to Table-1 of page 15)
Check the Vdd, Vgc, Vcc, VLDC.
Check (replace) the main board or
display
board
with
substitute
items.
H
Check (replace) the defective
power supply part with a substitute
item.
F
Force motor
Check that the connectors are installed
correctly(J10A).
Replace the force motor with a
substitute item.
(Refer
to
“5. Force Motor
Disassembly and Reassembly
”)
A
Main
board
assembly
Check the performance using the
standard
main
board
that
works
properly.
Replace the main board assembly
with a substitute item.
H
Analog
board
assembly
Check the performance using the
standard analog board that works
properly.
Replace
the
analog
board
assembly with a substitute item.
E
