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Extracted text from panasonic rf u300eg service manual (Ocr-read)
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1.4. AM alignment
1.4.1. AM VCO alignment
1. Set an electronic voltmeter between W51 (+) and W52 (-). (see Fig.1-4)
2. Receive 522kHz by pressing [Preset 1] key.
3. Adjust T2 so that the output will be DC0.8±0.05V.
4. Rotate Turning knob to receive 1494kHz.
5. Check the output is within the range DC4.4 - 5.2V.
1.4.2. AM RF alignment 1
1. Send 495 kHz from signal generator.
2. Connect the headp hone jack to measuring equipment. (see Fig.1-3)
Fig.1-3
3. Adjust the Tuning knob and receive 459 kHz.
4. Move the winding wire of the ferrite antenn a (T2) and tentatively fix it to the position where the output can be maximized. (see
Fig.1-4)
5. Output at pin 25 of IC1.
1.4.3. AM RF alignment 2
1. Send 1494 kHz from a signal generator.
2. Adjust the Tuning knob and receive 1494 kHz.
3. Adjust VC1 so that the output can be maximized.
4. Output at pin27 of IC1.
1.4.4. Completion of AM alignment
· Assemble the unit and complete the alignment.
1.4.5. Alignment point
Fig.1-4
3
RF-U300E G / RF-U3 50EG / RF-D5 EB / RF-D 7
FLE07 06
