Sony HKCU-FP1, Service Manual

Page: 97 / 296

6-5 (E)
HXCU-100
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:
1
RV1 (F-1)/SY-364 board
Speci fi cation: 27,000,000
?
50 Hz
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:
1
RV2602 (E-4)/DPR-300 board
1
RV2601 (E-4) /DPR-300 board
Speci fi cation: A = 4.0
?
0.5 V p-p (
1
RV2602)
B = 0
?
0.5 V dc (
1
RV2601)
CH2
Oscilloscope
Frequency
counter
Probe
IN
CH2
OUT
IN
RV1
1
TP4
9
8
7
6
5
4
3
2
1
L K J H G F E D C B A
SY-364 BOARD (SIDE A)
B
GND
A
1
2
3
4
5
6
B A C D E F G
RV2602
RV2601
1
1
TP262
DPR-300 BOARD (SIDE A)