ADJUSTMENT PROCEDURE-1
IDLING CURRENT ADJUSTMENT
TX-SR603X
[Procedure]
<Note> No load and No signal
Refer to " ADJUSTMENT PROCEDURE-2 " about the adjustment points and the test points.
1. Before idling adjustment, turn the trimming resistors
to counter clockwise.
2. Connect the DC voltmeter to test points.
Connect 100 ohm resistance near the terminal of the two poles of a Jig terminal.
6. Wait for
4 - 6
minutes. (Heat running)
7. Re-adjust the trimming resistors as 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
Adjustment point
R6040, R6041 and
R6042
R6043, R6044,
R6045 and R6046
Adjustment value
9 mV
Leave it as it is
11 mV
6 mV
Leave it as it is
8 mV
Measured value
In case 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 wall outlet.
4. Press the STANDBY/ON button into the power on.
5. Adjust the trimming resistors as following procedure immediately after power on.
Channel
Left
Right
Center
Surround Left
Surround Right
Surround Back Left
Surround Back Right
Channel
Left, Right and
Center
Surround Left
Surround Right
Surround Back Left
Surround Back Right
ID+
ID-
Test point
DC voltmeter
Jig terminal
100 ohms
1/4watts
8. Disconnect the DC voltmeter
.
9. Press the STANDBY/ON button into the power off.
10. Disconnect the AC power cord.
Specifications
( In a stable state)
12 +/- 3 mV
9 +/- 3 mV
Idling current are stabilized in about
10 minutes after a power supply ON.
[When]
1. Exchange Power transistors (Q6050 - Q6066).
2. Exchange Amplifier PC board ass'y (NAAF-8523).
Mark
L
R
C
SL
SR
SBL
SBR
