Panasonic SA-AK110P, Руководство по обслуживанию

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12.1. 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 volmeter)
−
Digital fruency counter
•
Test Tape
−
Tape speed gain adjustment (3 kHz, -10 dB);
QZZCWAT
12.1.1. 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.
Fig. 1
12.1.2. 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 “REC” mode (use “
●
REC/STOP” key).
1. Connect the instrument as shown in Fig.?.
2. Set the unit to AM mode.
3. Apply signal as shown in Fig. 1 from AM-SG.
4. Adjust Z102 so that the output frequency is maximized in
Fig. 2.
3. Measure and make sure that the output is within the
standard value.
Bias voltage for Deck 2 14±4mV (Normal)
Erase voltage for Deck 2 80mV (Normal)
12.1.3. Bias Frequency Adjustment (Deck
1/2)
1. Set the unit to “AUX” position.
2. Insert the Normal blank tape (QZZCRA) into DECK 2 and
set the unit to “REC” mode (
●
use “REC/STOP” key).
3. Adjust L1002 so that the output frequency is within the
standard value.
Standard Value: 97 ±8 kHz
Fig.1
12 Measurements and Adjustments
12.2. Tuner Section
12.2.1. AM-IF Alignment
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SA-AK110P /