7. video signal system adjustment (hkcu-904), 7-1. main clock (74 mhz) duty adjustment, 7-2. return clock (74 mhz) duty adjustment – Sony HDCU-900 User Manual
Page 72: 7. video signal sytem adjustment (hkcu-904)
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3-28 (E)
HDCU-900 MM
3-7. Video Signal Sytem Adjustment (HKCU-904)
3-7. Video Signal Sytem Adjustment
(HKCU-904)
3-7-1. Main Clock (74 MHz) Duty Adjustment
Measure : Oscilloscope (20 MHz BWLimit: ON)
Preparation
. Board extension : LC-41 board (front side)
Adjustment Procedure
Measuring point : TP1 (B-6)/LC-41
Adjusting point :
1RV1 (B-5)/LC-41
Specifications :
C = 1.65
±0.04 Vdc
A
B
A
=B
C
GND
LC-41 board (A side)
3-7-2. Return Clock (74 MHz) Duty
Adjustment
Measure : Oscilloscope (20 MHz BWLimit: ON)
Preparation
. Board extension : LC-41 board (front side)
Adjustment Procedure
Measuring point : TP309 (E-1)/LC-41
Adjusting point :
1RV301 (D-1)/LC-41
Specifications :
C = 1.65
±0.04 Vdc
A
B
A
=B
C
GND
RV301
TP309
TP1
RV1
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
G
H
J
K
L
M
1
1
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