T-SM47j P21/54
T20-a
OPERATION TABLE
v Raise the telescopic covers sufficiently to clear the
base covers and slide the base covers away from
the pedestal column taking care to release the cable
connected to the infrared receiver PCA fitted below
each base cover section. The cable plug is released
by pressing the moulded release catch.
vi Continue to slide the base covers away from the
table until clear and place them safe until replaced.
6.2.2.2 Replacing base covers.
i Slide the base covers into a suitable position to enable
the two infrared receiver leads to be reconnected to
the PCA fitted to each cover section, ensuring the
plug snaps into place correctly. Check both the
receivers are working by covering each in turn and
send a control command via an infrared handset.
ii Raise the telescopic cover sufficiently to enable the
covers to be correctly positioned and aligned.
iii Replace all the fixing screws (without threadlock)
and the earth equalization pin using threadlock (part
number 670650).
iv Replace and secure the foot pedals (see note below)
ensuring they are placed at their correct ends (long
pedal at head end) with the internal return spring in
place (spring only fitted if the pedal has an external
catch). Use threadlock (part number 670650) on
both screws.
Note: When replacing the foot pedal shoulder screw
(on pedals with internal spring return) initially tighten
with fingers to ensure that the shoulder of the screw
has correctly located into the hole in the shaft.
v Test table base functions.
6.2.3 Access to column.
6.2.3.1 Access can be gained behind the column covers
in four ways. Either, release the bottom of the telescopic
covers and lift them to gain access to the lower column
(see section 6.2.3.2), or release the top of the telescopic
covers and lower them to gain access to the lower-mid
column (see section 6.2.3.3), or release the bottom of the
bellows and raise them to gain access to the upper-mid
column (see section 6.2.3.4), or release the top of the
bellows and lower them to gain access to the top of the
column (see section 6.2.3.5).
6.2.3.2 Lower column access
i Raise the height of the tabletop as far as possible,
this will ensure maximum access and expose the
screws at the lower edge of the lowest telescopic
section where it joins the base covers.
ii Remove the two screws from the lower edge of each
side of the lowest telescopic cover (not the end face
screws).
Note: These screws differ in length and must be put
back as found (short 12mm to short trunk end, long
15mm to long trunk end).
iii Raise the telescopic covers to gain access to the
lower part of the column.
iv On completion of work on the lower column replace
the four lower retaining screws to secure the
telescopic covers to the base.
v Test that the telescopic covers function correctly by
powering the table between maximum and minimum
height several times.
6.2.3.3 Lower-mid column access
CAUTION
Ensure the cable to the standby control panel
and the earth wire is released before lowering
the telescopic covers, see ‘iii’ and ‘iv’ below.
i Remove fourteen plastic rivets (see inset of Fig. 6.1
for details) around the lower edge of the bellows.
ii Lift the bellows to the left and right of the accessory
and switch panels (items 8 and 9 of Fig. 6.1) and
remove the four screws securing the top edge of
the upper telescopic cover to the telescopic cover
support brackets (item 6 of Fig. 6.1).
iii Lower the telescopic covers slowly until sufficient
access has been gained behind them to allow
disconnection of the ribbon cable from the standby
control panel where it connects onto the column PCA.
iv Continue to lower the telescopic covers and if
required (i.e. if table is near maximum height)
disconnect the earth wire from the middle telescopic
cover where it is connected to the wrap round.
v On completion of work on the lower-mid column,
replace the column covers in the reverse of the
sequence above, check the electrical connections
have been made correctly during assembly. Use
threadlock (part number 670650) on all screws.
vi Test the telescopic covers and standby panel
function correctly by powering table between
maximum and minimum height several times and
testing other standby buttons.
6.2.3.4 Upper-mid column access
i Remove fourteen plastic rivets (see inset of Fig. 6.1
for details) around the lower edge of the bellows.
ii Lift the bellows to the left and right of the accessory
and switch panels (items 8 and 9 of Fig. 6.1) and
remove the two screws securing each switch panel
retainer (item 7 of Fig. 6.1) to the telescopic cover
support brackets (item 6 of Fig. 6.1).
iii The bellows can now be raised but take care not to
lift then too far without disconnecting the loom
connections from the switch panels where they
connect to the column PCA.
iv On completion of work on the upper-mid column,
replace the column covers in the reverse of above
sequence, check that the electrical connections have
been remade correctly during assembly. Use
threadlock (part number 670650) on all screws.
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