Panasonic SA-PM37MD Service Manual page 61

12.3.1.4. Laser Power Measurement
Laser power (read power and light power) is output in order to check the current setting value.
1. At service mode, press [CLOCK/TIMER] key on the remote
controller. (Laser power measurement mode is activated.)
FL Display: CHK PLAY
2. Insert the disc type of laser power meter. (Cf. Fig. 21)
3. While the above FL display appears, check the read power value,
and check that the value is not out of the reference range (600±30
W).
4. Press ENTER key on the remote controller.
FL Display: CHK REC
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