Panasonic SA-AK78 Service Manual page 12

SA-AK78
11.1.3. Bias and Erase Voltage Check
1. Set the unit to "AUX" position.
2. Insert the Normal blank tape (QZZCRA) into DECK 2 and
the unit to "REC" mode (use "
3. Measure and make sure that the output is within the
standard value.
4. Insert the CrO2 tape (QZZCRX).
5. Repeat steps 2 and 3.
Bias voltage for Deck 2 (Standard
value)
Erase voltage for Deck 2(Standard
value)
11.1.4. Bias Frequency Adjustment (Deck 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 (
3. Adjust L1201 so that the output frequency is within the
standard value.
Standard Value: 98 ±8 kHz
11.2. Alignment Points
Cassette Deck Section
All manuals and user guides at all-guides.com
REC/STOP" key).
: 19 ± 4mV (Normal): 27 ± 5mV
(CrO2)
: more than 100mV (Normal):
more than 150mV (CrO2)
use "REC/STOP" key).
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