Overhauling Procedures; Internal View And Circuit Board Locations; Troubleshooting - Mitsubishi Electric JT-SB116JH2-S-NA Handbook

13. 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.
The part names in the text are standardized with the part names in the parts catalog. (There are some
exceptions.)
<Internal view and circuit board locations>
Control circuit board
(JT-30M10/JT-30M10A)
Filter circuit board
(JT-34F)
Display circuit board
(JT-30S5R)
Light receiving circuit board
(JT-30S1R)
─ 16 ─
Sensor circuit board
(Middle sensor)
(JT-30S2R)
Sensor circuit board
(Lower sensor)
(JT-30S3R)
Power circuit board
(JT-34P1H)