Turntable Section; Cassette Deck Section - Teac GF-480 Service Manual

GF-480

3-2 TURNTABLE SECTION

1. Set function switch to the PHONO position.
2. Connect the oscilloscope to the speaker terminal.
3. Use a HP-4005 record for all adjustment.
PHONO SPEED PCB
VR2

3-3 CASSETTE DECK SECTION

3-3-1 Tape speed adjustment
1. Place the function switch in the TAPE position.
2. Connect the frequency counter to the speaker terminal.
3. Load tape decks with MTT-111N (use the midpoint of side A).
4. Press the PLAY button on tape and adjust MOTOR VR to obtain 3,000Hz +/- 30Hz.
5. Stop tape .
3-3-2 Azimuth adjustment
1. Connect the oscilloscope to the speaker terminal.
2. Load a MTT-114N test tape and press the PLAY button.
3. Adjust the azimuth using a screwdriver to maintain the max.
L & R out voltage.
4. Secure the azimuth position using locking paint.
6
VR3 VR4