Harman Kardon TU-940 - AM Section; AM VT Adjustment

Procedure:
FM Stereo signal
generator output
channel
VTVM
Connection
VTVM reading (dB)
L-CH. L-CH.
ⓐ
R-CH L-CH.
ⓑ
Adjust VR 102
minimum reading.
R-CH R-CH
ⓒ
L-CH. R-CH
ⓓ
Adjust VR 102 for
minimum reading.
L-CH. Stereo separation: ⓐ - ⓑ
R-CH Stereo separation: ⓒ - ⓓ
※ IF BAND Switch
NORMAL: Adjust VR 201
NARROW: Adjust VR 202
The separation of both channels should be equal.
AM SECTION
AM VT Adjustment
1. Set to AM 522 kHz and adjust L502 so that voltage of TP401 becomes 1.25V ± 0.1V
2. Set to AM 1611 kHz and adjust CT 502 so that voltage of TP 401 becomes 8.5 ± 0.1V
3. Repeat the above adjustments 1 and 2.
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