Troubleshooting Guide - Retevis RT638 Mode D'emploi

must be on the same channel as you.
Reset the unit
Take away the battery from walkie talkie battery compartment, then hold the Menu/PWR button meanwhile put
back the battery to walkie talkie battery compartment in right polarity. The unit will turn on and display CH 100.
Channel and Frequency (MHz)
Europe(16ch)
Ch. Frequency Ch. Frequency
1 446.00625 4
2 446.01875 5
3 446.03125 6
Remarks: Power: 0.5W; Working temperature: - 20°C ~ 60°C.
Caution:
Battery
1:If you use Alkaline battery, please use AAA size battery, but don't attempt to charge alkaline batteries.
2:Please don't mix old and new batteries, it will affect the battery lifetime.
3:Do not mix alkaline, standard (carbon-zinc),or rechargable(Ni-Cd,Ni-MH,etc.) batteries.
4:Alkaline battery have expiry time. Please make sure the battery are valid.
TROUBLE SHOOTING GUIDE
PROBLEM
No power or radio switchs
off after short time
Ch. Frequency
446.04375 7 446.08125
446.05625 8 446.09375
446.06875 9 446.10625
1:Check charger and correct battery installation.
2:Clean battery contacts(Important!) .
3:Replace battery by fully charged or a new battery .
4:Battery capacity poor: battery defective or at end of lifetime replace battery.
Ch. Frequency Ch. Frequency
10 446.11875 13
11 446.13125 14
12 446.14375 15
GUIDE
-6-
Ch. Frequency
446.15625 16 446.19375
446.16875
446.18125