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ADJUSTMENT AND CONFIRMATION PROCEDURES 2
ZONE 2 key
LISTENING
PHONES
To move to the next step, press ZONE 2 key.
To move to the previous step, press REC/ZONE 3 key.
To exit, press "STANDBY/ON" button.
2. Confirmation of DC detection circuit
1. Enter Test-1-00 mode.
2. Apply DC 1.5 to 3.5 V to MULTI CHANNEL INPUT terminal with no load.
Confirm that the speaker relay turns OFF.
Apply DC -1.5 to -3.5 V to MULTI CHANNEL INPUT terminal with no load.
Confirm that the speaker relay turns OFF.
Caution: Don't apply DC voltage more than 1 second.
To confirm all channels except subwoofer channel.
3. Confirmation of Current detection circuit
Enter Test-1-00 mode.
Connect the differentiating circuit and apply the 200Hz square signal to MULTI CH. input terminal.
Adjust the attenuator or Volume so that the output level becomes 35V p-p.
Confirm that the speaker relay does not turn OFF when a 3.0 ohm load is connected.
Confirm that the speaker relay turn OFF when a 1.0 ohm load is connected.
Caution:Don't continue more than 3 seconds.
To confirm all channels except subwoofer channel.
CR
OSCILLATOR
DIFFEREN-
TIATING
CIRCUIT
200Hz
SQUARE
INPUT
3.3k
GND
AUDIO
MODE
SELECTOR
ZONE
2
SELECT/ PRESET
SETUP
CONTROL / TUNING
REC/ ZONE
3
TUNING
MODE
MEMORY
LEVEL
EXIT
LEVEL
CLEAR
PUSH TO ENTER
PUSH TO ENTER
ATTENU-
ATOR
0.1 F
3.3k
1SS133
10k
Differentiating Circuit
REC/ZONE 3 key
VIDEO 7 INPUT
DIGITAL
S VIDEO
VIDEO
L
AUDIO
R
MULTI CH.
SPEAKER
INPUT
TERMINAL
UNIT
OUT-
PUT
0.01 F
TX-NR1000
OSCILLO-
SCOPE
35Vp-p
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