Mitsubishi Electric JT-SB116JH-G-NA Handbook page 18

(3) Control circuit board (JT-30M4/JT-30M4A)
1 Draw out the drain tank.
2 Unscrew the clamping screws, and remove the front panel.
(Two spl. screws 4×16, indicated by )
3 Unscrew the clamping screw, and remove the cover (micro).
(One spl. screw 4×16, indicated by )
4 Disconnect the lead wires from the control circuit board (JT-30M4/
JT-30M4A).
5 Unscrew the clamping screw, and remove the control circuit board
(JT-30M4/JT-30M4A).
(One spl. screw 4×12, indicated by )
Assembly precaution
Take care not to pinch the lead wires.
(4) Sensor circuit board (JT-30S2)
1 Remove the front panel. → See (3) 1 to 2.
2 Unscrew the clamping screws.
(Two PTT screws 4×16, indicated by )
3 Unscrew the clamping screws, and remove the fix pieces.
(Two spl. screws 4×12, indicated by )
Assembly precaution
Take care not to pinch the lead wires.
4 Remove the sensor circuit boards (JT-30S2). (Two locations)
Assembly precautions
• Insert the sensor circuit board between the claws of the fix piece.
• Take care not to pinch the lead wires.
• After installing the circuit board, make sure that the LED is upright.
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Front panel
Cover (micro)
Control circuit board (JT-30M4/JT-30M4A)
Fix piece
Fix piece
Sensor circuit board (JT-30S2)