Panasonic SA-PM31P Service Manual page 58

SA-PM31P / SA-PM31PC
13.2.5. Bias Voltage Check
1. Connect an electrical voltmeter. (Cf. Fig. 9) (Cf. Fig. 12)
2. Set the function to "TAPE" position.
3. Insert a normal blank cassette tape (QZZCRA).
4. While pressing and holding down [REC (
pressing the buttons till the recording pause mode is activated.)
5. Check that the output level is within the standard range.
Standard Range: 13.5 ± 4mV
13.2.6. Bias Frequency Check
1. Connect a digital frequency counter (Figure 13).
2. Set the function to "TAPE" position.
3. Insert a normal blank cassette tape (QZZCRA) and press "REC" mode on main unit.
4. Check that the output frequency is within the standard range.
Fig. 10
Fig. 11
/ )] button, press [TAPE (
Fig. 12
Standard Value: 98 ±8 kHz
Fig. 13
58
)] button to pause the recording mode. (Repeat