Dec Vco Free-Run Frequency Adjustment - Sony CA-702 Maintenance Manual

2-3-2. DEC VCO Free-run Frequency Adjustment

Preparations
1. Set the power switch of CA to OFF and extend the DIF-67 board.
2. Warm up for approximately ten minutes in the procedures below before performing the adjustment.
(1) Set the SDI/COMPOSITE switch on the outside panel of CA to SDI.
(2) Set the power switch of CA to OUTPUT and the power switch of a camcorder to ON.
(3) Warm up for approximately ten minutes.
3. S1-4/DIF-67 (ENC VCO ADJ) 8 ON
4. Connect each equipment referring to 2-1-3, "Connection - VCO Adjustment."
Adjustment Procedure
Equipment: Frequency counter, Oscilloscope
Test Point: TP3/DIF-67,
Adjustment Point: 1RV2 (VCO ADJ2)/DIF-67
27.0 ± 0.1 MHz
Specifications:
Note in Finishing Adjustment
. S1-4/DIF-67 8 OFF
CA-702
CA-702P
GND: E2/DIF-67
2-3. DIF-67 Board Adjustment
2-3-2. DEC VCO Free-run Frequency Adjustment
TP5
TP7
RV3
RV2
TP3
TP2
TP1
E1
TP102
E2
TP4
D3 D2
RV1
DIF-67 BOARD (A SIDE)
S1
2-5 (E)