Onkyo HT-R550, Руководство по обслуживанию

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HT-R550
ADJUSTMENT PROCEDURE-1
IDLING CURRENT ADJUSTMENT
[Procedure]
<Note> No load and No signal
Refer to "
ADJUSTMENT PROCEDURE-2 " for the adjustment points and the test points.
1. Before idling adjustment, turn the trimming resistors fully to counter clockwise.
2. Connect the dc voltmeter to test points,
using two 100 ohm resistors between the poles of the jig terminal and the dc voltmeter terminals.
6. Wait for 4 - 6 minutes. (Heat running)
7. Re-adjust the trimming resistors as the following procedure.
Adjustment point
(Trimming resistor)
R6040
R6041
R6042
R6043
R6044
R6045
R6046
Adjustment value
2.5 mV
2.5 mV
2.5 mV
1.5 mV
1.5 mV
1.5 mV
1.5 mV
Measuring point
(Test point)
P6080
P6081
P6082
P6083
P6084
P6085
P6086
R6041, R6042
and R6040
R6043, R6044,
R6045 and R6046
9 mV
Leave it as it is
11 mV
6 mV
Leave it as it is
8 mV
In below 9 mV
In case 9 - 11 mV
In case over 11 mV
In case below 6 mV
In case 6 - 8 mV
In case over 8 mV
3. Connect the ac power cord to a wall outlet.
4. Press
STANDBY/ON button to turn the power on.
5. Adjust the trimming resistors as the following procedure immediately after power on.
Channel
Center
Front Left
Front Right
Surround Left
Surround Right
Surround Back Left
Surround Back Right
Front Left, Front Right
and Center
Surround Left
Surround Right
Surround Back Left
Surround Back Right
ID+
ID-
Test point
DC voltmeter
Jig terminal
100 ohms
(1/4 watt)
8. Disconnect the dc voltmeter .
9. Press STANDBY/ON button to turn the power off.
10. Disconnect the ac power cord.
12 +/- 3 mV
9 +/- 3 mV
Idling currents are stabilized in about 10 minutes after power on.
[When]
1. Exchange Power transistor (Q6050 - Q6056, Q6060 - Q6066).
2. Amplifier PC board (NAAF-8779).
Mark
C
L
R
SL
SR
SBL
SBR
Channel Adjustment point Measured value Adjustment value
Specifications
( In a stable state)