Onkyo HT-R820THX - Page 4

OPERATION CHECK-1
DC VOLTAGE DETECTION PROTECTORS
HT-R820THX
1. Set the unit to test mode " Test-4-00 " .
1-1. Press and the hold down the CD button , then press the STANDBY/ON button when the unit is Power On.
1-2. Press the VIDEO 3 button, while the " Test - _ " is shown.
Unit will be in the state of " Test-4-00 ".
2. Repeat and press SPEAKERS B to the " Test-4-20 " is shown.
3. Check that the " Protect OK " is shown and speaker relays are turn Off.
If a circuit is failure, the " Protect NG " is shown.
4. Check about the " Test 4-21 " to " Test 4-31 " one by one.
Refer to <Fig-1> about the operation method.
5. Press the STANDBY/ON to power Off. (Exit the test mode.)
<Note1>
In test mode " Test 4-20 " to " Test 4-31 ", DC voltage is outputted from DSP IC a pre-amplifier section, and it is inputted into a
power amplifier circuit.
Therefore an external input is unnecessary in check.
<Note2>
Don't connect speakers or any load.
Don't short speaker terminals.
Test - _
Test - 4-00
Test - 4-20
Protect OK
Protect NG
Test - 4-20
Press
" SPEAKER B " button.
Test - 4-21
Press
" SPEAKER B " button.
Test - 4-22
Operation method
Press on " SPEAKER B " button ---> Next step
Press on " SPEAKER A " button ---> Retarn
Test - 4-31
<Fig-1>
Press
" SPEAKER A " button.
Press
" SPEAKER A " button.
Details of TEST MODE 4-20 to 4-31
TEST MODE
4-20
4-21
4-22
4-23
4-24
4-25
4-26
4-27
4-28
4-29
4-30
4-31
DSP
output ch.
FL
FR
C
SL
SR
SB
FL
FR
C
SL
SR
SB
DSP
output voltage
+DC
- DC
+DC
+DC
- DC
+DC
- DC
+DC
- DC
+DC
- DC
+DC
MASTER VOLUME = MAX.
blinks