Sony MZ-R501 Analog PCLink Operating Instructions Manual page 9

When to replace the battery
When the dry battery is weak, flashing r or "LoBATT" appears in the display. Replace
the dry battery.
Note that the battery level indicated by the battery indication is only approximate and
varies with the recorder condition.
Note
Stop the recorder before replacing battery.
2
Connect the headphones/
earphones and unlock the control.
3
Insert an MD.
Insert an recordable MD when recording.
1
Slide OPEN to open the lid.
HOLD
To i
headphones/earphones
(supplied)
Connect firmly
2
Insert an MD with the label side facing
front, and press the lid down to close.
9