Multitest 0.5dV, 1dV & 2.5dV
Service and Repair Manual
Number 022-780
Issue Number: 02
Page 24 of 32
vi.
Check the emergency stop switch loom
– perform a continuity test.
vii.
Perform a continuity test on Micro-switches SW1 and SW2 to ensure that they
work
viii.
Clean the internal face of the two limit switch PCB optos U1 & U2.
ix.
If all of the above are ok then replace the limit switch.
3) Opto on limit switch fails to work:
i.
Check that the limit switch rod moves freely.
ii.
If the limit switch rod doesn’t move freely then remove base from stand and check
that the micro switch spacer closest to the base casting hasn’t rotated causing it
to catch on the base casting.
iii.
Check that the limit switch is connected to the VIC PCB.
iv.
Check that the Opto reflector has been correctly positioned.
v.
If all of the above are ok then replace the limit switch.
4) Crosshead fails to move:
i.
Check that the motor is correctly wired to the motor VIC PCB.
ii.
Check that the Opto reflector has been correctly positioned.
iii.
Check that the motor and the ballscrew couplings have been tightened.
5) Stand fails to communicate with the gauge:
i.
Check that the gauge loom is securely connected to the back of the stand.
ii.
Check that the DV rear panel RJ11 6 way loom is connected properly to PL3 on
the VIC board.
iii.
Using a D.V.M check the continuity of the RJ11 loom.
iv.
Check that the RJ11 loom is wired correctly.
v.
If all of the above are ok then replace the VIC PCB.
NOTE:
The above checks are assuming that the gauge and connector loom being
used are in working order and that the gauge has been correctly configured to work
with the stand.
6) Stand fails to communicate with the pc:
i.
Check that the dV to PC cable (351-093) is securely connected to the back of the
stand.
ii.
Check that DV rear panel USB 4 way loom (352-234) has been correctly
connected to the VIC board PL1.
iii.
Using a D.V.M check USB 4 way loom (352-234) for continuity.
iv.
Check that the USB 4 way loom (352-234) has been correctly wired.
v.
If all of the above are ok then replace the VIC board.
NOTE:
The above tests are assuming that the dV to PC cable (351-093) being used
to connect the stand to a pc is in working order and that the pc being used has been
set up correctly.
7) Stand fails height test:
i.
Check that all the bolts securing the columns and crosshead assembly have been
correctly tightened and that the motor mounting bolts are tight.
ii.
Shim top crosshead as necessary.
