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3-8. Video System Adjustment (HDC1550)
n
Be sure to perform "3-7. TONE Adjustment" before
adjusting the video system.
3-8-1. Demodulation Tuning Adjustment
Preparation
1. Set S601 and S605 for adjustment on the DTX-1 board
in HDCU-950 as follows. (Refer to Section 3-6-2.)
S601: VBS
S605: SD
2. . Connect the signal generator to the RET 1 IN
connector on HDCU-950, and input the MOD
RAMP signal.
. Set S1 on the DM-141 board in HDFX100 to "0".
Adjustment procedure
3. Measuring equipment:
Oscilloscope
Input mode: DC
Test point:
TP201 (GND: E1)/MX-109 board
Adjusting point: 1LV201/MX-109 board
A = 3.4 ± 0.1 V dc
Specification:
4. . Re-set S1 on the DM-141 board in HDFX100 to
"F".
. Set S601 and S605 on the DTX-1 board in HDCU-
950 as follows. (Refer to Section 3-6-2.)
S601: SDI
S605: HD
5. Disconnect the signal generator from the RET 1 IN
connector on HDCU-950.
3-26
3-8-2. Return Sync Level Adjustment
Preparation
1. Set S601 and S605 for adjustment on the DTX-1 board
in HDCU-950 as follows. (Refer to Section 3-6-2.)
S601: VBS
S605: SD
2. . Connect the signal generator to the RET 1 IN
connector on HDCU-950, and input the MOD
RAMP signal.
. Set S1 on the DM-141 board in HDFX100 to "0".
Adjustment procedure
3. Measuring equipment:
Test point:
Adjusting point: 1RV201/MX-109 board
Specification:
4. . Re-set S1 on the DM-141 board in HDFX100 to
"F".
. Set S601 and S605 on the DTX-1 board in HDCU-
A
950 as follows. (Refer to Section 3-6-2.)
S601: SDI
GND
S605: HD
5. Disconnect the signal generator from the RET 1 IN
connector on HDCU-950.
1
RV302
2
TP202
Oscilloscope
Input mode: DC
TP202 (GND: E4)/MX-109 board
A = 600 mV
B
A
C
LV301
E1
LV201
TP201
RV301
LV302
TP301
RV201
E3
TP203
TP302
E4
MX-109 BOARD (SIDE A)
A
D
E
TP101
LV101
HDC1000/V1(E)
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