4-3. main clock (74 mhz) duty adjustment, 4-4. return clock (74 mhz) duty adjustment, 13 (e) – Sony HDCU-900 User Manual
Page 57
3-13 (E)
HDCU-900 MM
3-4. Video Signal System Adjustment (RC-86 Board)
3-4-3. Main Clock (74 MHz) Duty Adjustment
Measure : Oscilloscope (20 MHz BWLimit: ON)
Note
This adjustment corresponds to the RC-86 board with part
No. suffix -14.
Preparation
. Board extension : RC-86 board (front side)
Adjustment Procedure
Measuring point : TP201 (C-6)/RC-86
Adjusting point :
1RV201 (C-6)/RC-86
Specifications :
C = 1.65
±0.04 Vdc
A
B
A
=B
C
GND
RC-86 board (A side)
3-4-4. Return Clock (74 MHz) Duty
Adjustment
Measure : Oscilloscope (20 MHz BWLimit: ON)
Note
This adjustment corresponds to the RC-86 board with part
No. suffix -14.
Preparation
. Board extension : RC-86 board (front side)
Adjustment Procedure
Measuring point : TP703 (B-2)/RC-86
Adjusting point :
1RV701 (B-2)/RC-86
Specifications :
C = 1.65
±0.04 Vdc
A
B
A
=B
C
GND
A
B
C
D
E
F
G
H
J
K
L
M
1
2
3
4
5
6
7
8
9
S803
RV351
RV354
S801
S802
S811
1
1
R
V353
R
V350
R
V352
1
1
TP603
TP352
R
V601
COR601
TP350
TP351
1
TP501
R
V501
1
TP502
R
V502
COR501
TP201
RV201
1
TP703
RV701
1
Suffix:14
_
Suffix:14
_
1
1