Chapter G - PARTS REPLACEMENT & REPAIR
Planmeca Compact i G-7
INSTRUMENT MULTIPLEXER RELATED
Technical Manual
3 INSTRUMENT MULTIPLEXER RELATED
3.1 Preparations before instrument multiplexer related
replacements
a) Enter service mode 13 and switch off the main water valve.
b) Decompress the water pressure with the syringe instrument.
c) Turn off the power.
d) Decompress the air pressure with the syringe instrument.
e) Remove the instrument hoses by unscrewing the quick connectors.
f) Remove the instrument arms by pushing them from their positions.
g) Unscrew the M6x16 DIN 7984 screw from under the instrument console and open the
console cover.
3.2 Replacing the whole multiplexer
a) Perform the pre-replacement preparations described in section 3.1 “Preparations before
instrument multiplexer related replacements” on page G-7. Disconnect the blue tube (air)
from the angle nipple.
b) Disconnect the green tube (water) from the nipple.
c) Disconnect the bright tube (instrument return air) from the nipple.
d) Disconnect the Instrument multiplexer cable from the connector P11 on the Instrument
multiplexer PCB.
e) Disconnect the Console grounding cable from the instrument console casting by unscrewing
the M4x8 DIN 912 screw.
f) Unscrew the M4x50 DIN 912 and M4x20 DIN 912 screws from sides of the multiplexer
assembly.
g) Lift the multiplexer assembly from the console casting.
h) Remove the instruments and balanced arms.
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