Universal AC/DC Adapter
AH30BR/AH50BR
User’s Guide
The RCA brand Universal AC/DC Adapter allows you to power portable 
devices requiring 300mA or less (AH30BR) or 500mA or less (AH50BR) 
using a conventional AC electrical outlet.
Instructions:
1.  Set the voltage selector switch to the proper setting for your device. 
  Refer to the device’s user manual for the correct voltage requirement, 
or determine the voltage by multiplying the number of AA, AAA, C, or 
D batteries required by 1.5—for example, 4 batteries x 1.5 = 6 volts. 
 Note: Voltage setting may also be found next to the DC jack or on device 
information plate. 
2.   Select the adapter plug tip that best fi ts device.
3.   Before inserting the plug tip into the 
AC adapter receptacle, you must fi rst 
determine the correct polarity of your
device. Polarity is represented by the 
following symbols.
  Note: Polarity information may be found 
next to the DC jack, user manual, or device 
information plate. The adapter plug tips have a positive (+) symbol on one side 
and a negative (-) symbol on the other side. The AC adapter receptacle says 
“TIP” on one side. 
4.  If your device has positive polarity, align the word “Tip” on the AC 
adapter receptacle with the (+) symbol on the adapter plug tip. See 
diagram below.
  If your device has negative polarity, align the word “Tip” on the AC 
adapter receptacle with the (-) symbol on the adapter plug tip. See 
diagram below.
5.  Connect adapter plug tip into DC jack of your device.
6.  Plug the AC adapter into a 110/120-volt standard electrical outlet and 
operate device as usual. Important: This power unit is intended to be 
correctly oriented in a vertical or fl oor mount position.
7.  If your device does not work, IMMEDIATELY unplug the AC adapter and 
recheck the instructions carefully, particularly the voltage and polarity 
settings. 
CAUTION: 
1.  Never attempt to power a device for which the voltage or polarity is 
unknown. Improper voltage or polarity settings may result in severe 
damage to the device or AC Adapter. 
2.  This AC adapter should never be used with any device that requires more 
than 300mA (AH30BR) or 500mA (AH50BR) of current.
3.  Disconnect the AC adapter from electrical outlet when not in use.
positive
negative
positivenegative adapter receptacle
positive adapter receptacle
negative adapter receptacle