Technics RP-070 - Page 6

RP-070 §
ITEM 7 MEASUREMENT & ADJUSTMENT REMARKS
| Oscillation frequency Oscillation frequency adjustment for MN1404 of receiver.
adjustment (Adjustment of MN1404TS which serves as a check on “1” and “O” of
Equipment: input signal)
* Receiver (RP-070)
« Regulated DC power supply
or brand new battery
« Oscilloscope
1. Test equipment cannectian is shown below.
1615 14 13 12 11 10 9
-MN1404TS
16
Fig.
. Switch on the transmitter.
_ Make the adjustment so that the period time of the clock raaleney
can be read on the oscilloscope.
4. Adjust the semi-fixed resistor (VR1052) from No. 11 pina MN1404TS
so that the output of No. 16 pin is 16+0.2ms on the oscilloscope.
5. Criterion
The period time of clock frequency should be within 1620.2 ms.
Precautions
1. Each measuring instrument should not be used for at least 15 minutes
after switching it on.
2. A brand new QV battery or regulated DC power supply (9 V output)
should be used as the power source.
3. The measurements should be done under normal temperature and
humidity conditions. »
. The equipment should be completely earthed.