Sony DXC-637 - R-Y Level Adjustment; B-Y Level Adjustment; Alignment: Video Process System Adjustments; 1 H;2 H Gain Adjustment

Hn
3-4-6. R-Y Level Adjustment
Equipment: Oscilloscope
To be extended: EN-122 board
Preparation: OUTPUT switch/camera side - BARS
Test point: pin A15 (GND: A16)/extension board
Adjusting point: @RV4 (R-Y LEVEL)/SG-232 board
Specification: A= 700+20 mVp-p (for NTSC)
525 + 20 mVp-p (for PAL)
=
A
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3-4-7. B-Y Level Adjustment
Equipment: Oscilloscope
To be extended: EN-122 board
Preparation: OUTPUT switch/camera side > BARS
Test point: pin A13 (GND: A16)/extension board
Adjusting point: @RV3 (B-Y LEVEL)/SG-232 board
Specification: | A= 700+ 20 mVp-p (for NTSC)
525 + 20 mVp-p (for PAL)
SG-232 BOARD ~ SOLDERING SIDE —
RVE
"Oo RV3
(BY)
@
RV7
(PHASE)
¢.
@ . 4
Rv8 (RY)
(Q(U) LEV)
3-8
3-5. VIDEO PROCESS SYSTEM
ADJUSTMENT
3-5-1. 1H/2H Gain Adjustment
Object: Grayscale chart
Equipment: Oscilloscope
To be extended: PR-209 board
Preparation: WHITE BAL switch/camera side >
PRESET
Adjustment Procedure
1. Chart frame = Underscanned monitor frame
2. @RV13 (OH LEVEL)/IE-47 board
— Fully counterclockwise ©
3. Test point: TP3 (GND: E1)/IE-47 board
Adjusting point: Lens iris
Specification: White Level = 500 + 10 mVp-p
4. Open the lens iris two steps.
5. Test point: TP3 (GND: E1)/IE-47 board
Adjusting oiunt: @RV14 (1H LEVEL)/IE-47 board
Specification: White level = 1000 + 10 mVp-p
6. Test point: VIDEO OUT
Adjusting point: Lens iris
Specification: White Level = 100 + 2 IRE (for NTSC)
700 + 10 mV (for PAL)
7. Set the oscilloscope to GAIN ADD mode and to CH-2
INVERT mode.
8. Connect CH-1 and CH-2 of oscilloscope to TP3 (GND:
E1)/IE-47 board. Adjust CH2-VAR control on the
oscilloscope so that the waveform becomes flat for gain
correction.
9. Connect CH-1 of oscilloscope to TP4 (GND: E1)/IE-47
board and CH-2 to TP3 (GND: E1)/IE-47 board.
10. Adjust @RV14 (1H LEVEL)/IE-47 board so that the
waveform becomes flat.
11. Adjust @RV15 (2H LEVEL)/IE-47 board in the same
manner as the procedure 3 through 6.
Test point: CH1 TP4 (GND: E1)/IE-47 board
CH2 TP2 (GND: E1)/IE-47 board
0+10mV
DXC-637 (UC)
DXC-637P (EK)