Prompter Level Adjustment; Reference Signal System Adjustment (Hkcu-701A); Reference Sub-Carrier Adjustment; Reference Sc-H Detect Circuit Adjustment - Sony HDCU-700A Maintenance Manual Supplement

3-3. Video and Reference Signal System Adjustment

3-4. Reference Signal System Adjustment (HKCU-701A)

3-3-8. Prompter Level Adjustment

Preparation
. Input the 75 % color bars signal from NTSC signal
generator to PROMPTER IN connector on SDI-11
board.
Adjustment procedure
1. Equipment: NTSC waveform monitor
Test point: PROMPTER connector /HDC-700
Adj. point: 1RV1 (J-11) /DPR-108 board
A = 140 ±1 IRE (terminated with 75 Z)
Spec.:
A
3-16 (E)
3-4. Reference Signal System
Adjustment (HKCU-701A)

3-4-1. Reference Sub-carrier Adjustment

Preparations
. Supply a black burst signal (SC-H: 0 ± 5 degree) from
the signal generator to REFERENCE IN connector on
the DIF-40 board (terminate with 75 Z).
. S31 (M-7) /AT-103A board → LOCAL
Adjustment Procedures
1. Equipment: Oscilloscope
(20 MHz BW Limit → OFF)
Test point: TP2 (C-2) /IF-704 board
TRIG: TP3 (M-1) /IF-704 board
Adj. point: 1LV1 (C-2) /IF-704 board
Spec.: A = 3 V p-p or more and portions B
make flat as possible.
3-4-2. Reference SC-H Detect Circuit
Adjustment
Preparations
. Supply a black burst signal (SC-H: 0 ± 5 degree) from
the signal generator to REFERENCE IN connector on
the DIF-40 board (terminate with 75 Z).
. S31 (M-7) /AT-103A board → LOCAL
Adjustment Procedures
1. Equipment: Oscilloscope
(20 MHz BW Limit → OFF)
Test point: TP8 (N-5) /IF-704 board
TP7 (P-6) /IF-704 board (TRIG)
Adj. point: 1RV1 (M-4) /IF-704 board
A = 84 ± 2 ns
Spec.:
TP8
50%
TP7
50%
A
B
A
B
CH1 : 500 mV/DIV
TIME: 50 us/DIV
HDCU-700A