Planmeca Compact I, Technical Manual

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Chapter G - PARTS REPLACEMENT & REPAIR
G-22 Planmeca Compact i
ELECTRICAL PARTS REPLACEMENT
Technical Manual
5.3 Replacing main control PCB
WARNING
The mains voltage is always present at the mains terminal on the main control
PCB, even if the unit is switched off from its own mains switch.
a) Turn off the power supply line or disconnect the unit from the mains power source.
b) Unscrew the four M4x6 DIN 912 screws from the both sides of the electronics control box
cover. Lift the cover upwards until the top of it is released and remove the cover.
c) Disconnect all the cables that are connected to the main control PCB.
d) Unscrew the two M4x6 DIN 912 screws that connect the PCB heat sink to the box frame.
e) Unscrew the brass M4x6 DIN 84 grounding screw from next to the dental light cable
connectors and remove the ø4.3 DIN 6798 washer.
f) Detach the main control PCB from the PCB holders.
g) Install the new main control PCB in reverse order. All the cable connectors, except the ones
for the control panel, suction arm and foot control cables, are unique and no other cable can
be connected to the connector than the one in question. All the cable connectors are also
labelled.
NOTE After replacing the Main control PCB the dental unit automatically enters the
service mode “n.100 Select dental unit type (n mode = 0, 1, 2, 3, 4, 5, 6, 7)” on
page C-38 when the unit is switched on. The unit type must be selected before
you can use the dental unit.
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Box cover
Box frame
M4x6 DIN 912
M4x6 DIN 912
Main control PCB
M4x6 DIN 84
ø4.3 DIN 6798