Overhauling Procedures - Mitsubishi Electric JT-MC106G-W-NA Handbook

12. Overhauling procedures

Work precautions
• Before replacing parts, follow the instructions described in the troubleshooting.
• When servicing, always take care to keep proper footing.
• Before starting the service, always unplug the power cord from the outlet, or turn off the circuit breaker when
no power cord plug is provided. Sufficient care must be taken to avoid electric shock or injury.
• Make sure to connect the power supply wires correctly.
• After completing repairs, check that the unit operates properly.
Always wear gloves when servicing.
( 1 ) Turn off the power supply.
1 Stop the operation.
2 Turn off the circuit breaker on the distribution board.
(2) Display circuit board (JT-33D) and control circuit board (JT-33M)
1 Remove the drain tank.
2 Open the decorated panel, and unscrew the panel clamping screw.
(One special (spl) screw 4 x 14, indicated by )
3 Unhook the claws of the panel from the base, and remove the panel
(assembly). (Indicated by )
4 Unscrew the clamping screw for the display circuit board.
(One PTT screw 4 x 14, indicated by )
5 Remove the LED fix piece.
6 Remove the display circuit board (JT-33D).
Assembly precaution
Place the display circuit board (JT-33D) closely to the left side, and
then tighten the screw.
7 Unscrew the clamping screws for the control circuit board.
(Two PTT screws 4 x 14, indicated by )
8 Remove the control circuit board (JT-33M).
─ 16 ─
Panel (assembly)
LED fix piece
Display circuit board (JT-33D)
Control circuit board (JT-33M)