ONKYO HTR320
Service Manual

HT-R320 OPERATION CHECK-1
DC VOLTAGE DETECTION PROTECTORS
[NOTE1] Limit time to apply voltage is 0.5 to 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. 1. Set the unit to test mode " Test-1-00 " . 1-1. Press and the hold down the CD button , then press the STANDBY/ON button when the unit is Power ON.
FL display

Test - _

1-2. Press the DVD button, while the " Test - _ " is shown. Unit will be in the state of " Test-1-00 ".

Test - 1- 00
2. Apply DC voltage (+1.5 to +3V) to MULTI CHANNEL (FL, FR, SL, SR, C) terminal, each channel. 3. Check that " Protect " is shown. 4. Apply DC voltage (-1.5 to -3V) to MULTI CHANNEL (FL, FR, SL, SR, C) terminal, each channel. 5. Check that " Protect " is shown. 6. Press the STANDBY/ON button. 0.5 sec.
Disappears

Clear

CURRENT DETECTION PROTECTORS
[NOTE] In the state of test mode" Test-4-29 ", the pulse waveform output for checking from speaker terminal automatically. Therefore, oscillator is unnecessary. 1. Set the unit to test mode " Test-4-29 " 1-1. Press and the hold down the CD button , then press the STANDBY/ON button when the unit is Power ON.
FL display

Test - _

1-2. Press the VIDEO 3 button, while the" Test - _ " is shown. Unit will be in the state of " Test-4-00 ".

Test - 4- 00
1-3. Repeat and press SPEAKERS B button to the " Test-4-29 " is shown.

Test - 4- 29
2. Connect the lord resister (3 ohms) to the speaker terminals. 3. Check that the" Protect " is not shown, and speaker relays not turn OFF. 4. Check the each speaker terminals. 5. Connect the lord resister (1.5 ohms) to the speaker terminals. 6. Check that the " Protect " is shown, and speaker relays turn OFF immediately. 7. Check the each speaker terminals. 8. Press the STANDBY/ON button.
Disappears

Clear