3. Selection Modes for Service-related Operations3.1. ActionsSelect diagnostic mode (service path check mode), protection history display mode, or 232C standby clear mode.3.2. Starting upAVR-X2100WHold down buttons "ZONE2 SOURCE", "DIMMER" and "STATUS" at the same time and press the power button to turn onthe power.AVR-S900WHold down buttons "TUNER PRESET CH+", "TUNE -" and TUNE +" at the same time and press the power button to turnon the power.Select the mode using the button "TUNER PRESET CH+", and press the button "STATUS" to commit the selection.3.3. Displaying and Selecting Each ModeThe information shown on the display changes each time the button "TUNER PRESET CH+" is pressed.Press the button "STATUS" to set the currently displayed mode and restart the device.qFLD 1 . S E R V I C E C H E C KService Path Check Mode:The Video and Audio paths can be checked.This function is convenient for confirming problem paths in the product and executing a pathcheck after repair.wFLD 2 . P R O T E C T I O NThe protection history can be checked.eFLD 3 . R S 2 3 2 C R E S E TSwitches from 232C standby mode to normal standby mode.rFLD 4 . O P I N F OOperation Info for the unit can be checked.tFLD 5 . T U N E R F R Q S E TEnables reception STEP of the ANALOG TUNER to be changed.yFLD 6 . R E M O T E I DFunction to operate only the desired AV receiver.3.3. Canceling the modePress the power button to turn off the power.26