DTA-9.4
Rear panel
OUTPUT
ADJUSTMENT PROCEDURES-2
DC OFFSET ADJUSTMENT
When adjustment?
Replace the NAAF-7797 (Power amplifier PC board)
Notes
No load and No signal input.
How to adjustment?
1. Remove the top cover.
2. Connect a DC volt meter to the OUTPUT (Speaker terminal)
3. Connect the power supply card to a wall outlet.
4. Power On the unit.
5.
Adjust the R430 trimming resistor so that the reading of DC voltmeter becomes standard value.
Standard value : 0 5m V
6. Wait for five minutes.
7. Check the voltage of OUTPUT again. If reading of a voltmeter is outside a standard, will adjust again.
8. Power Off.
9. Remove a DC voltmeter.
Measuring point
Adjustment point
R430
Trimming resistor
DC voltmeter
Front side
w
w
w
.
x
i
a
o
y
u
1
6
3
.
c
o
m
Q
Q
3
7
6
3
1
5
1
5
0
9
9
2
8
9
4
2
9
8
T
E
L
1
3
9
4
2
2
9
6
5
1
3
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
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