Marantz NR1200 Service Manual page 110

3-2.4. Clearing the Protection History
There are two ways to clear the protection history.
(1) Activate Protection History Display Mode. Press the "STATUS" button to display the protection
history.
PRT:DC
Press and hold the "DIMMER" button for 3 seconds.
PRT:CLEAR
The above is displayed and protection history is cleared.
NO PROTECT
(2) Initialize this unit. (See "POST-SERVICE PRECAUTIONS")
b Use the method in 3-2.4. (1) if you do not want to erase your settings from this unit.
Warning Displays by POWER LED
If the power is turned Off while a protection is being detected, the POWER LED flashes in red to warn
you depending on the protection status as follows.
(1) ASO/DC protection: Flashes at 0.5-second intervals (0.25 seconds lit, 0.25 seconds unlit)
(2) THERMAL (A/B/E) protection: Flashes at 2-second intervals (1 seconds lit, 1 seconds unlit)
(3) CURRENT protection: Flashes at 4-second intervals (2 seconds lit, 2 seconds unlit)
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