Reference Signal System Adjustment; 27 Mhz Vco Free-Running Adjustment - Sony HXCU-FB70 Service Manual

6-2.

Reference Signal System Adjustment

6-2-1.

27 MHz VCO Free-Running Adjustment

Preparation
• Disconnect the cable from the REFERENCE INPUT connector on the rear panel.
• Connect the measuring equipment as shown in the figure.
• Start this adjustment after 10 minutes have elapsed from power-on.
CH2
Probe
IN
Oscilloscope
Adjustment
Equipment: Frequency counter/Oscilloscope
Test Point: TP300 (E-1) / DPR-337F board
Adjusting Point: RV2501 (F-1) / DPR-337F board
Specification: 27,000,000 ± 50 Hz
A B C
DPR-337F board (Side A)
Setting after Adjustment
After this adjustment is completed, reconnect the disconnected cable.
HXCU-FB70
CH2 IN
OUT
Frequency
counter
D E F G
RV2501
TP300
1
2
3
4
5
6-3