Onkyo TX-SR503, Руководство по обслуживанию

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TX-SR503/503E/8350
OPERATION CHECK-2
SPEAKER PROTECT-2 (CURRENT DETECTION)
1. Press and the hold down the
CD
button , then press the
STANDBY/ON
button when the unit is Power ON.
" Test - _ " is displays it only for 5 seconds.
2. Press the VIDEO 3 button, while the character of " Test - _ " is displayed.
Unit will be in the state of "
Test-4-00
".
3. Repeatedly press
TONE
+
button until the character of
" Test-4-35 "
is displayed.
4. Connect the Dummy load of
3
ohms to the Front Lch speakers terminal.
At this time, check the speaker relay is not turned off .
5. Connect the dummy load of
1
ohm to the Front Lch speakers terminal.
At that time, you check the speaker relay is turned off and " Protect " is displayed.
Disconnect the dummy load at once when check the display of " Protect " .
6. Check other channels according to the same procedure.
[Procedure]
<Note>
No input.
Do not check two or more channels at the same time.
Do not connect dummy load to speaker terminals fro seconds 2 or more.
T e s t - _
T e s t - 4 - 0 0
[When]
1. Exchange power transistors (Q6050 - Q6066).
2. Exchange amplifier PC board ass'y (NAAF-8523).
T e s t - 4 - 3 5
C l e a r
Turn off
7. Press the STANDBY/ON button.
T e s t - 4 - 3 5
P r o t e c t
T e s t - 4 - 3 5
Blinks