Aiwa XS-DV335 Service Manual page 40

<MW/LW Adjustment>
Make sure that the wirings/connections shown in the diagram below are in place before MW/LW adjustment.
Standard Signal Generator
5. IF Adjustment (MW)
Requirements
Measuring instruments: Oscilloscope and Millivoltmeter
Test point: Lch, Rch, GND
(1) Adjust the setting on the Standard Signal Generator (hereinafter referred to as S.S.G.)
as follows: carrier at 999kHz and distortion rate at 30%.
(2) While monitoring the waveform through oscilloscope, reduce the S.S.G. output level to a minimum.
(3) Adjust L802 so that the millivoltmeter indicates maximum.
6. Tracking Adjustment (MW)
Requirements
Measuring instruments: Oscilloscope and Millivoltmeter
Test point: Lch, Rch, GND
(1) Adjust the S.S.G. setting as follows: carrier at 999kHz and distortion rate at 30%.
(2) While monitoring the waveform through oscilloscope, reduce the S.S.G. output level to a minimum.
(3) Adjust L951 so that the millivoltmeter indicates maximum
7. Tracking Adjustment (LW)
Requirements
Measuring instruments: Oscilloscope and Millivoltmeter
Test point: Lch, Rch, GND
(1) Adjust the S.S.G. setting as follows: carrier at 144kHz and distortion rate at 30%. Reduce the S.S.G. output level to a minimum
(2) Adjust L941 so that the millivoltmeter indicates maximum.
(3) Adjust the S.S.G. setting as follows: carrier at 290kHz and distortion rate at 75kHz. Reduce the S.S.G. output level to a minimum
(4) Adjust TC942 so that the millivoltmeter indicates maximum.
(5) Repeat the above steps (1) to (4) two to three times.
8. Auto-Stop Function Check (MW)
Requirements
Test point: Lch, Rch, GND
(1) Adjust the S.S.G. setting as follows: carrier at 999kHz, distortion rate at 30%, and output level at 78dBuv.
(2) Start the tuning search mode, and check that the auto-stop function is applied at 999kHz.
60cm
– 40 –
SET
TP
Connected to each
Lch
measuring instrument.
Rch
GND
OSCILLOSCOPE
CH1 CH2
Lch
Rch
GND
AC MILLIVOLTMETER
CH2
CH1
Lch
GND
GND
Rch
GND