Aiwa XR-EM30 Service Manual page 40

ELECTRICAL ADJUSTMENT-5/8
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< AM ADJUSTMENT>
For AM adjustment, do wiring and connection as in the following.
5. If Adjustment
Requirement
Measuring equipment: Oscilloscope or Millivoltmeter
Test point: TP8(Lch), TP9(Rch), GND
Adjustment point: L802
1) Adjust the setting of Standard Signal Generator (hereinafter S.S.G.) to 999KHz
of 30% variation.
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2) Adjust the receiving frequency of the main unit at 1000KHz.
3) While looking at the waveform on the oscilloscope, reduce the output level all the
way (till a certain degree of is monitored
4) Adjust L802 until the waveform of the oscilloscope reaches the maximum.
6. Tracking Adjustment (MW)
Requirement
Measuring equipment: Millivoltmeter
Test point: TP8(Lch), TP9(Rch), GND
Adjustment point: L954, L955
1) Adjust the S.S.G. setting to 1000KHz of 30% variation and reduce the output level all the
way (till a certain degree of is monitored through the oscilloscope).
2) Adjust the reception frequency of the main unit to 1000KHz.
3) Adjust L954 until the value of the millivoltmeter reaches the maximum.
4) Adjust the S.S.G. setting to 600KHz of 30% variation and reduce the output level
all the way (till a certain degree of is monitored through the oscilloscope).
5) Adjust the reception frequency of the main unit to 600KHz.
6) Adjust L955 until the value of the milivoltmeter reaches the maximum.
Repeat the adjustment 2 or 3 times from step 1 to 6 above.
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through the oscilloscope).
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