Panasonic SA-AK58 Service Manual page 61

13.2.4. Bias OSC Frequency Adjustment / (Deck 2)
1. Set the unit to "AUX" position.
2. Insert the Normal blank tape (QZZCRA) into DECK2 and set the
unit to "REC" mode (use " REC/STOP" key).
3. Adjust L1201 so that the output freguency is within the standard
value. / Standard value : 98±8kHz
13.2.5. Bias Voltage Check
1. Set the unit to "AUX" position.
2. Insert the Normal blank tape (QZZCRA) into DECK2 and set the
unit to "REC" mode (use " REC/STOP" key).
3. Measure and make sure that the output is within the standard
value.
4. Insert the CrO2 tape (QZZCRX).
5. Repeat step 2 and 3. / Standard value (Normal) : 19±4mV /
Standard value (CrO2) : 27±5mV
13.2.6. Erase Voltage Check
Fig.11
Fig.12
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