Chroma (Y/C) Level Adjustment; Vf Sync/Blkg Level Adjustment - Sony DSR-300 Service Manual

7-3-10. Chroma (Y/C) Level Adjustment

Equipment:
Oscilloscope
To be extended: ES-21 board
Preparation:
OUTPUT/DL/DCC+ switch/camera
side → BARS
EXT VTR OUTPUT switch/camera
side → Y/C
. Solder SL401 on the ES-21 board.
. Measure the level at TP189 after the termination with 75 Z
resistor.
Test point: TP199 (GND: TP200)/extension board
Trigger: HD (TP149/extension board)
Adjusting point: 1RV102 (CHROMA (Y/C) LEV)/ES-
21 board
for NTSC A = 286 ± 10 mV
Specification:
for PAL
[for NTSC]
[for PAL]
Note: After adjustment, remove the solder from SL-
401.
C
A
B
RV101
RV103
1
FL102
FL101
2
E601
TP801
3
E801
L702
4
FL405
FL404 FL406
FL407 FL408
5
SL401
ES-21 BOARD (A SIDE)
DSR-300/P(E)/V1
A = 300 ± 10 mV
D E
F
RV102 RV104 RV105
G
DL101 DL102
DL401
DL402
FL401
FL402 FL403
CN101

7-3-11. VF SYNC/BLKG Level Adjustment

Equipment:
Oscilloscope
To be extended: ES-21 board
Preparation:
OUTPUT/DL/DCC+ switch/camera
side → BARS
. If no viewfinder (DXF-701) is loaded, terminate TP125
with 3 kZ resistor.
Trigger:
HD (TP149/extension board)
Adjustment Procedure
1. SERVICE menu "PAGE 7"
→ VF SYNC
VF BLKG
Note: First, perform "VF BLKG" adjustment, then
"VF SYNC" adjustment.
2. Perform adjustment by turning the MENU dial, then
store the data by pushing the MENU dial.
Extension board (GND: TP126)/ES-21 board
Item Test Point
VF BLKG TP125
VF SYNC TP125
[for NTSC]
(NTSC)
A
B
Specification
A = 50 ±10 mV
NTSC: B = 290 ± 10 mV
B = 300 ± 10 mV
PAL:
[for PAL]
(PAL)
A
B
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