Denon AVR-4520, Service Manual

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3. Service Related Selection mode
3.1. Behavior specifications
In this mode, you can switch between the Diagnostic mode (SERVICE CHECK), the Displaying the protection mode
(PROTECTION), the 232C clear mode (RS232C RESET) and the operation information (OP INFO).
3.2. Starting up
Press the "Power operation (
X
)" button to turn on power while pressing the "ZONE/REC SELECT" and "STATUS"
buttons.
Press the "Cursor
d
/
f
" button to select the mode and press the "ENTER" button to restart the set and make the setting
take effect.
q
Upper
– 1 . S E R V I C E C H E C K
Lower
2 . P R O T E C I O N
This mode is used for confirming the Video and Audio (signal)
paths. (Diagnostic mode)
The signal paths of the set can be easily confirmed after repair.
w
Upper
1 . S E R V I C E C H E C K
Lower
– 2 . P R O T E C I O N
The protection history can be checked.
e
Upper
2 . P R O T E C I O N
Lower
– 3 . R S 2 3 2 C R E S E T
The 232C standby mode is changed to the Normal standby mode.
r
Upper
3 . R S 2 3 2 C R E S E T
Lower
– 4 . O P I N F O
The operation information about the set can be checked.
3.3. Canceling Service Related Selection mode
Turn off the power by pressing the "Power operation (
X
)" button.