Planmeca ProMax Technical Manual page 230

Chapter G - COLUMN
1) Remove the temple supports and chin support from the patient support table.
2) Remove the shoulder arm cover (Fig. 31, 1) (see section 5.6 "Shoulder arm covers" on page
E-84). Remove the telescopic column rear cover plates (Fig. 31, 2) according to the
instructions given in section 2.2 "Removing the telescopic column rear cover plates" on page
G-10.
3) Unscrew the four M4x16 DIN 912 attachment screws of the column top cover with the 3mm
Allen key and remove the cover (Fig. 31, 3).
4) Detach the stationary column side covers (Fig. 31, 4).
5) Remove the telescopic column upper front panel (Fig. 31, 5) according to the instructions
given in section 2.1 "Removing the telescopic column upper front panel" on page G-8.
6) Remove the telescopic column lower front panel by pulling it outwards (Fig. 31, 6). Unscrew
the M4x8 DIN 7984 screws with the 2.5mm allen key and remove the panel mounting frames.
OR
Remove the accessory cabinet as follows. Remove the accessory boxes. Detach the cabinet
door from the its hinges. Unscrew the four attachment screws of the accessory cabinet base
and remove the base (Fig. 31, 7). Unscrew the two M4x6 DIN 7984 attachment screws of the
motor cover and remove the cover (Fig. 31, 8).
7) If the column motor is functional, drive the telescopic column to the lowest possible position.
8) Switch off the unit and unplug the unit from mains outlet.
9) Detach the Input module from the telescopic column (Fig. 31, 9) according to the instruction
given in section 6.3 "Input PCB" on page G-36. Disconnect the connectors from the Input
PCB.
10) If the column motor is not functional, move the telescopic column to the lowest position either
by rotating the motor screw with an Allen key and a ratchet spanner.
The telescopic column can also be moved downwards by detaching the lift nut assembly from
the stationary column. In this case properly support the telescopic column when detaching the
nut. Detaching the nut may enable the column to fall causing a dangerous situation and/or
damage to the equipment.
11) Lock the shoulder arm and the C-arm to the transportation position with the alignment pins as
shown on the Fig. 31, 10.
12) Detach the hinges and the three mounting blocks from the column (Fig. 31, 11).
13) If the unit is equipped with a cephalostat, disconnect all the cephalostat cables from the CPU
PCB and detach the cephalostat.
G-12 Planmeca ProMax
REPLACING THE COLUMN MOTOR
Technical Manual