Idling Current Adjustment; Adjustment Procedure - Onkyo HT-R560 Service Manual

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ADJUSTMENT PROCEDURE-1

IDLING CURRENT ADJUSTMENT

[When]
1. Exchange Power transistor (Q6050 - Q6056, Q6060 - Q6066).
2. Amplifier PC board (NAAF-9419).
[Procedure]
Refer to "ADJUSTMENT PROCEDURE-2 " for the adjustment points and the test points.
<Note> No load and No signal
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.
DC voltmeter
3. Connect the ac power cord to a wall outlet. And press ON/STANDBY button to turn the power on.
4. Adjust the trimming resistors as the following procedure immediately after power on.
Channel
Front Left
Front Right
Center
Surround Left
Surround Right
Surround Back Left
TE
L 13942296513
Surround Back Right
5. Wait for 4 - 6 minutes. (Heat running)
6. Re-adjust the trimming resistors as the following procedure.
Channel
Front Left, Front Right
and Center
Surround Left
Surround Right
Surround Back Left
Surround Back Right
<Notes>
Idling currents are stabilized in about 10 minutes after power on.
7. Disconnect the dc voltmeter.
8. Press ON/STANDBY button to turn the power off. And disconnect the ac power cord.
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100 ohms
Jig terminal
(1/4 watt)
Adjustment point
R6041 R6041
R6042 R6042
R6040 R6040
R6043 R6043
R6044 R6044
R6045 R6045
R6046 R6046
Measured value
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
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2 9
8
Test point
ID+
ID-
Test point Adjustment value
P6081 P6081
P6082 P6082 2.5 mV 2.5 mV
P6080 P6080
P6083 P6083
P6084 P6084 1.5 mV 1.5 mV
P6085 P6085
Q Q
3 6 7 1 3 1 5
P6086 P6086
Adjustment value Specifications
9 mV 9 mV
Leave it as it is Leave it as it is 12 +/- 3 12 +/- 3 mV
11 mV 11 mV
6 mV 6 mV
Leave it as it is Leave it as it is 9 +/- 3 mV 9 +/- 3
8 mV 8 mV
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9 4 2 8
0 5 8 2 9 9 4 2 8
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HT-R560
9 9
9 9