Marantz AV7703 Service Manual page 134

3-1. Selecting the Mode for Service-related
3-1.1. Actions
Select diagnostic mode (service path check mode), protection history display mode, or 232C standby
clear mode.
3-1.2. Starting up
While holding down buttons "ZONE SELECT" and "BACK" simultaneously, press the power button to
turn on the power.
Select the desired mode using the "CURSOR f / d " button, then press the "ENTER" button to confirm.
3-1.3. Displaying and Selecting Each Mode
The information shown on the display switches each time the "CURSOR f / d " button is pressed.
Press the "ENTER" button to set the currently displayed mode and restart the device.
q
L1
–1.SERVICE CHECK
L2
3.RS232C RESET
Service Path Check Mode：See "DIAGNOSTIC
The Video and Audio paths can be checked.
This function is convenient for confirming problem paths in the product and checking the
paths after repairing.
w
L1
1.SERVICE CHECK
L2
–3.RS232C RESET
Switches from 232C standby mode to normal standby mode.
e
L1
3.RS232C RESET
L2
–4.OP INFO
Operation Info for the unit can be checked.
MODE"
r
L1
4.OP INFO
L2
–5.TUNER FRQ SET
Enables reception STEP of the ANALOG TUNER to be changed.
3-1.4. Canceling the selected mode
Press the power button to turn off the power.
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