Additional Information; Maintenance - Sony CDX-M800 Bedienungsanleitung

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.
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Additional Information

Maintenance

Fuse replacement
When replacing the fuse, be sure to use one
matching the amperage rating stated on the
original fuse. If the fuse blows, check the power
connection and replace the fuse. If the fuse blows
again after replacement, there may be an internal
malfunction. In such a case, consult your nearest
Sony dealer.
Warning
Never use a fuse with an amperage rating
exceeding the one supplied with the unit as this
could damage the unit.
Fuse (10 A)