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QQ
3 7 63 1515 0
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.
Adjust the R430 trimming resistor so that the reading of DC voltmeter becomes standard value.
5.
Standard value : 0
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
Rear panel
TE
L 13942296513
Adjustment point
Front side
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2 9
8
DC voltmeter
OUTPUT
Q Q
3
6 7
1 3
1 5
co
.
9 4
2 8
0 5
8
2 9
9 4
2 8
R430
Trimming resistor
m
DTA-9.4
9 9
9 9
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