Panasonic SA-AK520E Service Manual page 65

During the above display, executing CD PLAY will display auto adjustment result for CD PLAY
mode.
15. Measurements and Adjustments
15.1. Cassette Deck Section
- Measurement Condition
- Make sure head, capstan and press roller are clean.
- Judgeable room temperature 20 ± 5 °C (68 ± 9°F)
- Measuring instrument
- EVM (DC Electronic voltmeter)
- Digital frequency counter
- Test Tape
- Tape speed gain adjustment (3 kHz, -10 dB); QZZCWAT
15.1.1. Tape Speed Adjustment (Deck 1/2)
1. Set the tape edit button to "NORMAL" position.
2. Insert the test tape (QZZCWAT) to DECK 2 and playback (FWD
side) the middle portion of it.
3. Adjust Motor VR (DECK 2) for the output value shown below.
Adjustment target: 2940 ~ 3060 Hz
(NORMAL speed)
4. After alignment, assure that the output frequency of the DECK 1
FWD are within ±60 Hz of the value of the output frequency of
DECK 2 FWD.
15.1.2. Bias and Erase Voltage Check
1. Set the unit "AUX" position.
2. Insert the Normal blank tape (QZZCRA) into DECK 2 and the unit to
Fig.1
65