Onkyo TX-8522 - Adjustment and Confirmation Procedures (Continued); Current Detection Circuit Test; FL Tube Test Mode

TX-8522
ADJUSTMENT AND CONFIRMATION PROCEDURES 2
3. Confirmation of Current detection circuit
Set the unit to "TEST-1-00".
Connect the differentiating circuit and apply the 50Hz square signal to CD terminal
of each channel.
Adjust the attenuator or Volume so that the output level becomes 30V p-p.
Confirm that the speaker relay does not turn OFF when a 2.0 ohm load is connected.
Confirm that the speaker relay turns on when a 0.5 ohm load is connected.
CR
OSCILLATOR
DIFFEREN-
TIATING
CIRCUIT
ATTENU-
ATOR
UNIT
SPEAKER
TERMINAL A
CD
INPUT
INPUT
OUT-
PUT
3.3k
10k
1SS133*6
3.3k
GND
0.01 F
0.1 F
OSCILLO-
SCOPE
Differentiating Circuit
50Hz
SQUARE
30Vp-p
FL TEST MODE
1. Press and hold down CD button, then press STANDBY/ON button.
2. After "TEST-" on the FL tube is displayed, press CD button to set the unit to the test mode of FL tube.
The segments of odd
number light on .
All segments
light on.
Test mode of FL tube
TUNING DOWN
TUNING UP
The segments of even
number light on .
"Model Name "
light on.
Letter from 1 to F
light on.
Confirmation of microprocessor version
Press and hold down DISPLAY button,
then press STANDBY/ON button.
Confirmation of thermal detector
Press and hold down DISPLAY button,
then press STANDBY/ON button.
During Microprocessor version is displayed,
press SPEAKER B button.