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3-3-6. SD-SDI Input VCO Free-run
Adjustment
Note
Perform this adjustment only when replacing IC29 on the
DIF-40 board.
Preparations
. COP1 (C-3) /DIF-40 → FREE-RUN
. Connect the equipments as follows.
. Before adjustment, warm up the unit for about 10
minutes.
CH2
Probe
IN
Oscilloscope
Adjustment Procedures
1. S4 (L-7) /AT-103A → D1
2. Equipment: Frequency counter
Test point:
TP7 (A-3)/DIF-40 board
1RV5 (A-3) /DIF-40 board
Adj. point:
27.0 ± 0.2 MHz
Spec.:
3. S4 (L-7) /AT-103A → D2
4. Equipment: Frequency counter
Test point:
TP7 (A-3)/DIF-40 board
Adj. point:
1RV6 (A-3) /DIF-40 board
14.3 ± 0.1 MHz
Spec.:
Note
After 10 minutes or more when these adjustments are
complete, check that each specification is met.
If not, perform these adjustments again.
Resetting after Adjustment
. COP1 (C-3) /DIF-40 → NORMAL
HDCU-700A
CH2
IN
OUT
Frequency
counter
3-3. Video and Reference Signal System Adjustment
3-3-7. Sub-carrier Frequency Free-run
Adjustment
Preparations
. Disconnect cable from REFERENCE IN connector on
the DIF-40 board.
. 1RV4 (M-4) /IF-704 → Fully counterclockwise
. S31 (M-7) /AT-103A board → LOCAL
. S15 (M-5) /AT-103A board → IF
Adjustment Procedure
1. Equipment: Frequency counter
Test point:
TP6 (N-5) /IF-704 board
1RV2 (N-2) /IF-704 board
Adj. point:
14,318,180 ± 20 Hz
Spec.:
11
10
9
8
7
RV25
TP14
RV11
TP16
TP17
RV24
RV23
RV7
RV9
RV8
RV17
RV16
RV27
RV32
S12
IF-704 Board (Component side)
6
5
4
3
2
LV1
TP2
TP24
TP25
RV605
RV603
RV604
TP15
RV22
RV801
RV802
RV15
RV800
RV600
RV601
RV606
S8
TP18
S7
S4
RV4
TP3
1
RV1
RV3
TP6
RV2
TP8
1
TP7
RV12
RV18
RV10
RV14
RV13
3-15 (E)
1
A
B
C
D
E
F
G
H
J
K
L
M
N
P
Q
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