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13.2. Tuner Section
This section include details on the alignment of AM-IF and AM RF adjustment.
13.2.1. AM-IF Alignment
1. Set up the equipments as shown in Fig. 5.
2. Select [TUNER] mode on selector and set to [AM] mode.
3. Apply signal as shown in Fig. 5 from AM-SG.
4. Adjust Z2602 accordingly so that the output frequency is maximized at 450kHz in Fig. 6.
13.2.2. AM RF Adjustment
1. Set up the equipments as shown in Fig. 7.
2. Select [TUNER] on selector and set to [AM] mode.
3. Set AM-SG to 520kHz.
4. Receive 520kHz in the unit.
5. Adjust L2601 (OSC) so that the EVM-AC is maximized.
6. Set AM-SG to 600Hz.
7. Receive 600Hz in the unit.
8. Adjust L2601 (ANT) so that the EVM-SG is maximized.
9. Set AM-SG to 520kHz.
10. Receive 520kHz in the unit.
11. Adjust L2602 (OSC) so that the EVM-DC value is with 1.1±0.5V.
Fig. 5
Fig. 6
45
SA-AK640PL
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