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SECTION 3 ELECTRICAL ADJUSTMENTS
0 dB = 1 µV [AM] Setting: BAND switch: AM
AM RF signal generator Put the lead-wire antenna close to the set. 24 � set 30% amplitude modulation by 400 Hz signal Output level: as low as possible + �
2 jack (HPJ1)
2nd Local Frequency (57.1 MHz) Adjustment Setting: BAND switch: FM Procedure: 1. Connect the frequency counter to TP (OSC). 2. Adjust L2 for 56.75 MHz reading on the frequency counter.
level meter
Specification values: 56.5 to 57.0 MHz Connection:
frequency counter 1 µF 50 V TP (OSC) + + �
[FM] Setting: BAND switch: FM
FM RF signal generator 0.01 µF set 22.5 kHz frequency deviation by 400 Hz signal Output level: as low as possible TP (RF IN) 24 � + �
2 jack (HPJ1)
level meter
FM STEREO (38 kHz) Adjustment Setting: BAND switch: FM Procedure: 1. Connect 10 µF Capacitor between TP (38 kHz) and TP (GND). 2. Connect the frequency counter to TP (VCO). 3. Adjust L4 for 38 kHz reading on the frequency counter. 4. Disconnect 10 µF Capacitor in step 1. Specification values: 37.95 to 38.05 kHz Connection:
1 µF 50 V TP (VCO) + frequency counter + �
� Repeat the procedures in each adjustment several times, and the frequency coverage and tracking adjustments should be finally done by the timmer capacitors.
AM FREQUENCY COVERAGE ADJUSTMENT Adjust for a maximum reading on level meter L3 520 kHz CT1 (3/4) 1,750 kHz
AM TRACKING ADJUSTMENT Adjust for a maximum reading on level meter L5 CT1 (4/4) 600 kHz 1,400 kHz
FM FREQUENCY COVERAGE ADJUSTMENT Adjust for a maximum reading on level meter L6 CT1 (1/4) 86.5 MHz 109.5 MHz
FM TRACKING ADJUSTMENT Adjust for a maximum reading on level meter L1 CT1 (2/4) 86.5 MHz 109.5 MHz
