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I. INITIAL
A. LOWEST VOLUME ADJUSTMENT
1. Tune the volume pot to lowest state.
2. Input a high voltage signal such as 5V from CD input.
3. Connect a oscilloscope to L channel binding posts.
4. Observing the oscilloscope,adjust VR301,make the output of speakers become to the
lowest level.
5. Adjusting VR302,make R channel output become to the lowest level by same way.
B. IDLING CURRENT
1. Power on
2. Running 5 minutes with no signal
3. Connect a DC voltmeter toTP1 and TP2 ,adjust VR22/VR23 for 6mV reading on voltmeter.
4. Connect a DC voltmeter toTP3 and TP4 ,adjust VR12/VR13 for 6mV reading on voltmeter.
C.ISC CIRCUIT ORIGINAL ADJUSTING
Adjust the pot VR3 to make the DC voltage of the point of TP5 to the same as TP6
II. FINAL ADJUSTMENT
Repeat procedure A,B and C for the lowest volume level, idling current alignment
and ISC original level respectively.
ALIGNMENT PROCEDURES
C725BEE MAINBOARD
TP1
VR23
TP2
VR22
VR12
TP3
VR13
TP4
TP6
TP5
VR3
VR302
VR301
VR304
VR303
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