T-SM47j P43/54
T20-a
OPERATION TABLE
6.6.5 Power supply assembly
6.6.5.1 The power supply assembly, (item 6 of Fig. 6.8)
is replaced as a complete unit.
6.6.5.2 Remove the long base cover as detailed in
section 6.2.2.
6.6.5.3 To replace the complete Power supply assembly
remove all external connections to the PSU (mains
connection and energy chain loom). Remove the complete
Power supply assembly by releasing the screws that
secure it to the table base. Replace the new Power supply
assembly and reconnect all the looms.
6.6.5.4 Reassemble the table and carry out a table
function test.
6.6.6 Traverse motor
6.6.6.1 Prior to changing a traverse motor ensure that
the unit has failed (and not the control circuit) by placing
24V (directly from the batteries in the table base) across
the motor terminals or lead, see note below. If the motor
fails to run in both directions replace it as detailed in section
6.5.2.1.
Note: To test motors Tool No. 2201 can be used, this
consists of an inline ‘on off’’ switch with leads to clip onto
the battery terminals and the motor terminals or leads. To
reverse the motor direction reverse the battery
connections.
6.6.7 Break motor
6.6.7.1 Prior to changing a break motor ensure that the
unit has failed (and not the control circuit). IMPORTANT
Remove the motor from the short trunk section before
continuing, as detailed in section 6.5.2.3. Place 24V
(directly from the batteries in the table base) across the
suspect motor terminals or leads (see note in section 6.6.6).
If the motor fails to run in both directions replace it as
detailed in section 6.5.2.3.
6.6.8 Tilt and Trendelenburg motors
6.6.8.1 Prior to changing a tilt or Trendelenburg motor
ensure that the unit has failed (and not the control circuit)
by placing 24V (directly from the batteries in the table base)
across the motor terminals or lead (see note in section
6.6.6). If the motor fails to run in both directions replace it
as detailed in section 6.4.5.
6.6.9 Telescopic column assembly
6.6.9.1 Prior to changing a telescopic column assembly
ensure that one of the two motors within the column have
failed (and not the control circuit). Place 24V (directly from
the batteries in the table base) across each of the motor
terminals or leads in turn (see note in section 6.6.6). If
either of the motors fail to run in both directions replace
the telescopic column assembly as detailed in section 6.4.4.
6.6.10 Break potentiometer loom
6.6.10.1 To replace a break potentiometer loom (see note
in 6.6.1) remove both the cover over the potentiometer
and the short trunk bottom cover (item 3 or 11 of Fig. 6.6).
6.6.10.2 Remove the short trunk black top ready for
recalibration. The potentiometer can now be removed by
releasing the connector on the end of its short loom.
Replace with a new break potentiometer loom.
6.6.10.3 The new potentiometer must be calibrated, check
Appendix 2 and proceed as detailed in the ‘Application
software manual’.
6.6.10.3 Reassembling the table (using threadlock part
number 670650 on all screws) noting any applicable torque
values as shown in Fig. 6.5 and 6.6 and the note on Fig.6.6.
6.6.11 Tilt potentiometer loom
6.6.11.1 The tilt and Trendelenburg potentiometer looms
(see note in 6.6.1) must be changed as a pair (they are on
the same loom). Remove the trunk sections and top
location angles as detailed in section 6.2.5.1 parts i-iv and
the top of column cover (item 12 Fig. 6.1).
6.6.11.2 Gain access to the top of the column as detailed
in section 6.2.3.3 and remove the connection on the four
actuator PCA from the tilt and Trendelenburg potentiometer
loom.
6.6.11.3 Remove both the potentiometers from the
Trendelenburg frame (see Note Fig. 6.3) and replace them
with the new loom assembly. Ensure the loom is replaced
as found and connect to the four actuator PCA.
6.6.11.4 After reassembling the table (using threadlock
part number 670650 on all screws) the new potentiometers
must be calibrated, check Appendix 2 and proceed as
detailed in the ‘Application software manual’.
6.6.12 Trendelenburg potentiometer
6.6.12.1 The tilt and Trendelenburg potentiometer looms
must be changed as a pair (they are on the same loom).
See 6.6.11.1 above for details.
6.6.13 Height potentiometer loom
6.6.13.1 To replace a height potentiometer loom (see note
in 6.6.1) raise the height of the table to make access easier
and then gain access to the column as detailed in 6.2.3.
6.6.13.2 Remove the connection on the four actuator PCA
from the height potentiometer loom then release (see note
below) the lower end of the height potentiometer cable
from the base plate and allow it to slowly retract back.
NOTE: DO NOT ALLOW CABLE TO SNAP BACK
6.6.13.3 Finally remove the height potentiometer
assembly (item 17 of Fig. 6.3) from the lower edge of the
wrapround assembly.
To Next Page
Loading...
