Panasonic SJ-MJ50GH Service Manual page 31

But if available is a MD cartridge type only, follow the procedure below.
1. Disassemble the unit so that only the mechanism unit and the printed circuit
board are exposed. (as shown in
2. Set the laser power meter cartridge. (as shown in
3. Set the battery and attach and secure the battery cover with a rubber band.
(as shown in Fig. 9
4. Follow the steps for "6.2.1. Enter the adjustment mode". (Subsequent
procedures are the same as those for the sensor type.)
Fig. 8
)
Fig. 8
Fig. 9
)
Fig. 8
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)