18
AVR-4310CI/AVR-4310/AVC-4310
2.3. Clearing the protection history
There are two ways to clear the protection history, as described below.
(1) Start up the error (protection history display) mode, display the error, then press and hold in the "ENTER" button for 3 
seconds.
Press and hold in the "ENTER" button for 3 seconds
The above is displayed and the protection history is cleared.
(2) Initialize.
※ If you want to save a backup, use the method in 3.(1) above.
Warning indication by the STANDBY LED
If the power is turned off when a protection incident has been detected, the STANDBY LED (red) flashes as follows as 
warning according to the conditions in which the protection incident occurred.
(1) ASO/DC PROTECTION : Flashes in cycles of 0.5 seconds (0.25 seconds lit, 0.25 seconds off)
(2) THERMAL PROTECTION : Flashes in cycles of 2 seconds (1 second lit, 1 second off)
3. Mode for switching tuner frequency step ---E2 model only---  g
3.1. Operation specifications
Change tuner frequency step to FM:200kHz/AM:10kHz STEP.
Starting up:
(1) With the "STANDARD" and "DIRECT/STEREO" buttons pressed, press the "ON/OFF" button to turn the power on.
 "*Tuner FRQ Set" appears on the display.
(2) Use 0 1 and select "<AM10/FM200>".
(3) Press the "ENTER" button.
(4) Press the "ON/OFF" button to turn the power off.
(5) Then, press the "ON/OFF" button to turn the power on.
NOTE : Backup data(Remove settings for Installer Setup) initialization is carried out automatically.
P
ROTEC T H I S TORY
:
THERMAL
P
ROTEC T H I S TORY
:
NO PROTECT
*
Tune r FRQ Se t
0
MA9/FM50M
1
*
Tune r FRQ Se t
0
MA10/FM20
1