V 0 8 0 6 1 2 1 N
Month Date
Release No. Destination
Year
M Z X X X X X X X X X
(XX is displayed in Hex)
S E R V I C E M O D E
S R 4 0 2 3
3. SERVICE MODE
Microprocessor (IC41) and FLD Segment Check Mode.
Connect the mains cord into the unit.1.
Press the 2. POWER ON/STANDBY button for turn on the unit.
Press the 3. DIMMER, MUTE and TUNING/PRESET UP buttons simultaneously more then 3 seconds.
The FL display shows "SERVICE MODE" for 2 seconds then shows the model name. 4.
Press the 5. S.DIRECT button, the software version of the MAIN CPU (IC41) is displayed in the format below.
Press the 6. S.DIRECT button again, the serial Number of the unit is displayed.
Press the 7. S.DIRECT button again, the left half, right half and center of the label area in the FLD light on and
off each other.
Press the 8. S.DIRECT button again, the segments of the character area in the FLD flick in checker pattern.
Press the 9. S.DIRECT button again to quit this mode.
HOW TO RESET THE UNIT
Should the operation or display seem to be abnormal, reset the unit with the following procedure.
The unit is turned on, press and hold the MUTE and S.DIRECT buttons simultaneously for 3 seconds or more.
Remember that the procedure will reset the settings of the TUNER PRESET etc., to their initial settings.
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