Sony CDX-M850MP - Manual (Page 28)

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Setting the security code
This unit has a security function to discourage
theft. Input a 4 digit number as your security
code.
If you set it, you need to input the stored code to
turn on the unit should you re-install the unit in
another car or after changing the battery.
1
Press (SOURCE) .
2
Press (MENU) .
3
Press M or m repeatedly to select
“Security.”
4
Press (ENTER) .
Code Set display is displayed.
1 Press M or m repeatedly to enter the
first digit (0-9).
2 Press , to move the cursor to the
2nd digit, then press M or m
repeatedly to enter the 2nd digit.
Each time you press
M , a digit goes
up and each time you press m , a
digit falls.
3 Repeat step 2 to enter the 3rd digit
and the 4th digit.
5
Press (ENTER) .
Check Code display appears.
6
Press M or m repeatedly to select
“YES.”
7
Press (ENTER) .
The display returns to the normal display.
Notes
• The security code cannot be entered by the number
buttons (1-6).
• Make sure not to forget your security code.
• If you select “NO” in step 6 and press
(ENTER) , the
display returns to the Code Set display in step 4.
After the security code setup is
completed
Should you re-install the unit in another car or
change the battery, the Check Code display
appears after turning on the unit. Enter your
stored 4-digit code with the cursor buttons
(
M/m/,), and press (ENTER).
Code Input display
OK : returns to the clock display.
NG : “Code Error” message appears.
Input the correct code using the cursor buttons.
Cancelling the security code
Repeat step 1 to 4 in “Setting the security code”
(Code Del display appears). Enter your stored
code with the cursor buttons (
M/m/,), and
press (ENTER).
Code Del display
OK : returns to a normal display.
NG : the “Code Error” message appears.
Input the correct code using the cursor buttons.
Note
You cannot change the security code unless you
delete your stored code.
Tip
If the security code is not stored, the Code Del display
does not appear.