5
Approx.
using hours*
MDR-IF420RK
MDR-IF520RK
1
1 hour. 15 min.
24
30
Approx.
charging
hours
1
24**
To recharge the headphones’
battery after use
To charge the battery, follow steps 4
and 5.
Since little electric current is used for
charging, there is no need to worry
about overcharging.
Charging and using hours
* at 1 kHz, 1 mW+1 mW output
** the hours required to fully charge an empty
battery
Using the headphones with a
commercially available R6 (size AA)
dry battery
Install the battery in the manner as
described in steps 1 through 3 of
“Charging the headphones’ battery.”
When a R6 (size AA) dry battery is
installed, the battery charge function is
not activated.
Battery life*
* at 1 kHz, 1 mW+1 mW output
Battery
Sony alkaline
battery LR 6 (SG)
Sony battery R6P
(SR)
Approx. hours
MDR-IF420RK MDR-IF520RK
70
80
35
40
4
Connect the supplied AC power
adaptor to the transmitter.
5
Rest the headphones on the
transmitter so that the contact pins
fit into the contact holes on the
headphones. The charging
indicator lights.
Notes
•Use only the supplied rechargeable battery NC-
AA (HJ).
•You cannot recharge other R6 (size AA)
rechargeable battery (NC-AA etc.) with this
unit.
When the indicator is not lit
Check the connection to make sure that
the contact pins are properly fitted into
the contact holes on the headphones, or
if the headphones are rested on the
transmitter correctly.
Transmitter
to an AC
outlet
AC power
adaptor
(supplied)
to DC IN
9V jack
