– 7 –
SECTION 3
SERVICE MODE
3-1. GENERAL
This set has the test mode of the built-in microprocessor which
allows various check items required repairing.
3-2. SETTING THE TEST MODE
Press the POWER key and the EFFECT key at the same time and
turn on the power. (Insert the DC plug)
3-3. RELEASING THE TEST MODE
Remove the DC plug.
3-4. TEST MODE
1. LED check
*1) In test mode
*2) All infrared LEDs on
*3) All infrared LEDs on
2. Key check
*4) Corresponding LEDs
POWER key
: POWER LED
INPUT key
: ANALOG LED
*5) Digital input check : Do not use this in repair.
*6) Analog input check : Other than MUTE check, do not use this
in repair.
*7) Mute mode : Use this in electrical adjustment (see page 8).
*8)
L
C
R
LS
RS
HR LED
HL LED
4. IF test tone
LEDs go on in sequence
*
1)
All LEDs on
All LEDs off
POWER,INPUT keys
POWER,INPUT keys
Go to Key check
*
3)
*
2)
POWER,INPUT keys
Go to Audio check
Press each key and its corresponding
LED goes on
*
4)
POWER,INPUT keys
Go to IF test tone
*
5)
*
7)
POWER, DIGITAL,
L and R LEDs on
*
5)
HL and HR LEDs off
*
6)
POWER,INPUT keys
POWER,INPUT keys
POWER and MUSIC LEDs on
OUTPUT key
OUTPUT key
OUTPUT key
OUTPUT key
OUTPUT key
OUTPUT key
End of Test mode
1 kHz, –10 dBv
1 kHz, –30 dBv
100 Hz, –30 dBv
10 kHz, –30 dBv
1 kHz, FS
L LED on
C LED on
R LED on
RS LED on
LS LED on
POWER,INPUT keys
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