Tone Detection Frequency Adjustment - Sony HXCU-100 Service Manual

Output Level Adjustment
n
Before starting this adjustment, check that the 1.4-MHz
demodulation circuit adjustment has been completed.
Adjustment
Equipment: Oscilloscope
Test Point: TP1503 (E-6)/DPR-300 board
GND: E1501 (F-6)/DPR-300 board
Adjusting Point: 1RV1502 (E-6)/DPR-300 board
B = 220 ?10 mV p-p
Specifi cation:
After the adjustment, disconnect the cable between connec-
tor CN3901 on the DPR-300 board and the FM signal
generator, and then connect the coaxial cable of the unit to
CN3901.

6-6-3. Tone Detection Frequency Adjustment

Frequency Adjustment
Preparation
. Disconnect the coaxial cable from the connector CN3901
(RF) on the DPR-300 board.
. Connect the measuring equipment as shown in the fi gure.
Adjustment
1. Equipment: Frequency counter
Test Point: TP1505 (F-6)/DPR-300 board
GND: E1501 (F-6)/DPR-300 board
Adjusting Point: 1RV1503 (E-6)/DPR-300 board
16.38 ?0.10 kHz
Specifi cation:
2. After the adjustment, connect the coaxial cable to the
connector CN3901 (RF) on the DPR-300 board.
HXCU-100
CH2 CH2
Probe
IN OUT
Oscilloscope
B
IN
Frequency
counter
6-13 (E)