Board Adjustment; Enc Vco Free-Run Frequency Adjustment - Sony CA-702 Maintenance Manual

2-3. DIF-67 Board Adjustment

2-3-1. ENC VCO Free-run Frequency Adjustment

2-3. DIF-67 Board Adjustment
2-3-1. ENC 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. S1-3/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: TP1/DIF-67,
Adjustment Point: 1RV1 (VCO ADJ1)/DIF-67
27.0 ± 0.1 MHz
Specifications:
Note in Finishing Adjustment
. S1-3/DIF-67 8 OFF
2-4 (E)
GND: E1/DIF-67
TP5
TP7
RV3
RV2
TP2
TP3
TP1
E1
TP102
TP4 E2
D3 D2
RV1
DIF-67 BOARD (A SIDE)
S1
CA-702
CA-702P