Video/Reference Signal System Adjustment; 27 Mhz Vco Free-Running Adjustment; Stair Case Adjustment - Sony HXCU-100 Service Manual

6-3. Video/Reference Signal System
Adjustment

6-3-1. 27 MHz VCO Free-Running Adjustment

Preparation
. SYSTEM OPERATION menu
S02:GENLOCK → SD
. Extend the SY-364 board using an extended board.
. Disconnect the cable from the REFERENCE INPUT
connector on the rear panel.
. Connect the measuring equipment as shown in the fi gure.
. Start this adjustment after 10 minutes have elapsed from
power-on.
Adjustment
Equipment: Frequency counter/Oscilloscope
Test Point: TP4 (G-1)/SY-364 board
Adjusting Point: 1RV1 (F-1)/SY-364 board
27,000,000 ?50 Hz
Specifi cation:
Setting after Adjustment
After this adjustment is completed, set the switch to the
previous state and reconnect the disconnected cable.

6-3-2. STAIR CASE Adjustment

Precautions
This adjustment is used tentatively when a repair is made.
This adjustment must be made again according to the
waveform monitor characteristics at the system setup.
Preparation
Extend the DPR-300 board using an extended board.
Adjustment
Equipment: Oscilloscope
Test Point: TP262 (A-3)/DPR-300 board
Adjusting Point: 1RV2602 (E-4)/DPR-300 board
1RV2601 (E-4) /DPR-300 board
A = 4.0 ?0.5 V p-p (1RV2602)
Specifi cation:
B = 0 ?0.5 V dc (1RV2601)
HXCU-100
CH2 CH2
Probe
IN OUT
Oscilloscope
TP4
RV1
1
L K J H G F
SY-364 BOARD (SIDE A)
G F E D
DPR-300 BOARD (SIDE A)
A
IN
Frequency
counter
9
8
7
6
5
4
3
2
1
E D C B A
C B A
1
2
RV2602 1
RV2601 1
TP262
3
4
5
6
B
GND
6-5 (E)