Onkyo TX-SR500/E Service Manual page 42

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 200Hz square signal to MULTI CHANNEL INPUT terminal
of each channel.
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 "Protect" indicator lights on when a 1.5 ohm load is connected.
Caution:Don't continue more than 3 seconds.
CR
OSCILLATOR
DIFFEREN-
TIATING
CIRCUIT
200Hz
SQUARE
INPUT
0.1 F
3.3k
GND
Test Mode
1. Turn POWER button on.
2. Press and hold down CD button, then press STANDBY/ON button.
3. After "TEST-" on the FL tube is displayed, press CD button to set the unit to the test mode of FL tube.
Note: DVD:TEST-1 VIDEO 1 :TEST-2 SP-A: UP
VIDEO 2 :TEST-3 VIDEO 3:TEST-4 SP-B: DOWN
Test mode of FL tube
All segments
light on.
SP-A
"FEDCBA987654321"
light on.
The segments of odd
number light on .
The segments of even
number light on .
"Good-bye **"
light on.
MULTI
CHANNEL
INPUT
ATTENU-
ATOR
3.3k
1SS133
10k
Differentiating Circuit
SP-B
**: Region US:U.S.A.
EU:Europe
WR:Other models
Press POWER button
to finish the test mode of FL tube.
SPEAKER
TERMINAL
UNIT
OUT-
PUT
0.01 F
Test-X YZ
FL TUBE
Confirmation of voltage sensor
1. Set the unit to TEST-3-2.
2. Apply the signal 1kHz, -15dBV to the MULTI-CH
input. Confirm that the FM STEREO is displayed.
Confirm the all channels except SUBWOFFER.
3. When connect the resistor 2.7 kohm/1 W between
the terminals COM and TH1 of P6301, confirm that
"FM STEREO" light on.
Note: No input signal.
4.When set the unit to "TEST-4-30,confirm
that the speaker relays of RL6901 and RL6902
turn off.
Note: No input signal.
42
TX-SR500/E
OSCILLO-
SCOPE
35Vp-p
Item