Test Mode Operation - Onkyo DR-S2.2 Service Manual

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ADJUSTMENT PROCEDURES-2
OPERATION TEST-1
1. Speaker relays
1. Speaker relays turn ON approximately 5 seconds after STANDBY/ON is pressed.
2. Speaker relays turn OFF immediately after STANDBY/ON is pressed OFF.
2. DC detection circuit
1. Set the unit to "TEST-1-00." (Refer to TEST MODE OPERATION)
2. Apply DC voltage (+1.5 to - 3V) to TAPE PLAY terminal, each channel.
3. Check the speaker relays turn OFF immediately.
4. Apply DC voltage (from -1.5 to -3V) to TAPE PLAY terminal, each channel.
5. Check the speaker relays turn OFF immediately.
[NOTE1] Limit time to apply voltage is 0.5 - 1.0 seconds each channel.
When protection operation does not occur at once, try several times.
[NOTE2] Don't connect speakers or any load. Don't short speaker terminals.
[NOTE3] The relay recovers in one second in "TEST-1-00." So it is not held OFF.
3. Headphones insertion detection.
The SURROUND MODE changes to "STEREO" when headphones are inserted to phones jack.
4. IPM (Intelligent power Management ) operation
1. Set the unit to the state of "TEST-1-01. " (Refer to TEST MODE OPERATION)
2. Apply -60dBV signal to TV/LINE terminals.
3. Intercept the input signal.
4. Check the following operation.
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FL display
IPM
Te s t - 1 - 0 1
Blink
5. Thermal protection circuit
1. Set the unit to the state of "TEST-1-00". (Refer to TEST MODE FOR OPERATION)
2. Connect a resister 100 ohms /1W at P8501(test point) in NADG-7452.
3. The speaker relays turn OFF immediately.
6. Cooling fan operation
A. Low speed mode
The cooling fan is always rotating slowly.
1. The cooling fan is always rotating slowly after STANDBY/ON is pressed.
B. High speed mode
1. Set the unit to "TEST-1-00. " (Refer to
2. Apply 1kHz, -20dBV sine wave to
3. The cooling fan is rotating quickly.
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IPM
Blink

TEST MODE OPERATION

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