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ACR 4251 GB
18
Anti-theft protection
This car radio is supplied with inactive code
protection. In order to switch the security
coding system on, proceed as described in
the following.
If the coding system is active while the power
supply to the system is interrupted (e.g. theft,
disconnection of the car battery), the set will
be electronically blocked. In such a case it
can only be made operable again by entering
the correct code number given in the car
radio passport.
Entry of a wrong code number
It should not be possible for a thief to find out
the correct code number by trial and error.
This is why the set will be blocked for a certain
period of time after a wrong code number has
been entered. The display will then show
“CODE ERR”.
After the first three unsuccessful attempts
the system will lock for 10 seconds; after
further attempts, the waiting time extends to
one hour.
After 19 unsuccessful attempts the display
will show “OFF”. In this case you can no
longer re-start the unit.
Note:
Keep your car radio passport with the code
number in a safe place in order to avoid
“unauthorised access” to your car radio.
When the security code system is activated,
the unique code must be entered each time
the power to the unit was interrupted.
The radio will function again as soon as you
have entered the correct code.
If you have lost your radio passport and
forgotten the code number, your radio can
only be made operable again by one of our
authorised service workshops, which is sub-
ject to payment.
Switching on security coding
To activate the coding system:
• Turn off the radio.
• Press preset buttons 1 and 4 simul-
taneously and hold down.
• Turn on the radio.
The display shows “CODE”.
• Briefly press preset button 1; the dis-
play shows “0000”.
• Enter the code number given in the
Blaupunkt car radio passport.
Example: The code number is 2521.
- Press preset button 1 twice; the dis-
play shows “2000”.
- Press preset button 2 five times; the
display shows “2500”.
- Press preset button 3 twice; the dis-
play shows “2520”.
- Press preset button 4 once; the dis-
play shows “2521”.
• To confirm the code number:
Press the
button.
Now the security coding system is active.
The display will briefly show “C” each time the
set is turned on.
If the display shows “CODE ERR”, you have
entered a wrong code. Re-enter the correct
code after the waiting time (“CODE” will ap-
pear in the display).
If you switch off the set while it is blocked, the
waiting time will start anew as soon as the
radio is turned on again.
Re-start following an interrup-
tion of the power supply
(coding system is activated)
• Turn on the radio.
The display shows “CODE”.
• Enter the code number given in the
Blaupunkt car radio passport and con-
firm (see example under “Switching on
security coding”).
The unit is now ready for use.