Service Mode - Marantz SC7S1/F1N Service Manual

7. SERVICE MODE

1. To enter the Service Mode, press the POWER switch with pressing the DISPLAY and ATT buttons on the main unit to switch
power ON, or when the remote code '166363' is received while power is ON.
2. The version number is displayed as '×××' on the 7-segment LED.
The Light-up LED is lit (other LEDs lit off).
"×××" means version ×.××.
3. Press the ATT button to light the LEDs one by one (except the Light-up LED which is always lit) , and 'LEd' is displayed.
4. Press the ATT button to light each 7-segment LED one by one.
All LEDs (including the Light-up LED) are lit off.
5. Press the ATT button to light all the 7-segment LEDs and the LEDs.
6. Press the ATT button to display the ID number.
If the ID number switch on the rear panel is changed, the displayed ID number also changes (polling at 250ms intervals).
7. Press the ATT button to display 'BUS', one second after followed by 'BOK' or 'BNG'.
'BNG' is displayed if the unit is unable to receive the command that has issued by the unit itself.
'BOK' is displayed if the unit is able to receive the command that has issued by the unit itself.
The circuit is designed to go through the command, so 'BOK' is displayed even if the remote cable is not connected. 'BNG'
is displayed when the cable is in a closed-loop and the unit is the Master , or when the cable is not connected and the unit
is a Slave.
8. Press the ATT button to display 'Uol'.
The display changes to 'Up' if the Volume knob is turned clockwise, and to 'dUn' if it is turned counter-clockwise.
9. Press the ATT button to display 'SEI'.
When the INPUT SELECTOR is changed the corresponding LED is lit.
10. Press the ATT button to display 'Att'.
The corresponding text is displayed for the operation buttons and knobs as shown below.
SW Key
Front Display
Front ATT
RC BALANCE
RC SACD/CD
RC LINE-1
RC LINE-2
RC TAPE
RC Volume UP
RC Volume Down
RC ATT
RC Trim
RC EXIT
RC A-Trim Up
RC A-Trim Down
RC B-Trim Up
B-Trim Down
RC
Displayed
7Seg
text
DSP dSp
ATT Att
RC r C
RC r C
RC r C
RC r C
RC r C
RC r C
RC r C
RC r C
RC r C
RC r C
RC r C
RC r C
RC r C
r C
RC
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