Planmeca Compact I, Technical Manual

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Chapter G - PARTS REPLACEMENT & REPAIR
Planmeca Compact i G-11
INSTRUMENT MULTIPLEXER RELATED
Technical Manual
3.3 Replacing one multiplexer block (other than syringe)
CAUTION Care must be taken when removing and installing the multiplexer block for not
to damage the quick connector pins that are attached to the Instrument multi-
plexer PCB.
NOTE Avoid bending the Instrument multiplexer PCB when removing and installing
the multiplexer block.
a) Perform the pre-replacement preparations described in section 3.1 “Preparations before
instrument multiplexer related replacements” on page G-7.
b) Remove the multiplexer assembly from the console casting as described in section 3.2
“Replacing the whole multiplexer” on page G-7.
c) Unscrew the five TORX WN1451 3x6 PT screws and remove the multiplexer plate.
d) Disconnect the instrument control valve (of the multiplexer block in question) from the
connector on the Instrument multiplexer PCB.
e) Unscrew the two M4 DIN980 nuts that keep the multiplexer blocks connected together.
Remove the blocking flange and unscrew the two spindle screws.
f) Unscrew the M4x6 DIN 912 screw that connects the multiplexer block in question to the
Instrument multiplexer PCB.
g) Remove the multiplexer block in question from the multiplexer assembly by pulling it to the
direction away from the Instrument multiplexer PCB.
h) Install the new multiplexer block in reverse order.
i) Bleed the multiplexer according to the instruction described in chapter F, section 5
“BLEEDING OF THE SPRAY WATER SYSTEM” on page F-31
M4 DIN 980
Blocking flange
Spindle screw
M4x6 DIN 912
Multiplexer plate
Detached multiplexer block
TORX WN1451 3X6 PT