Sony DXC-637 - Pedestal Level Adjustment; Gamma Balance and Gamma Set Pre-adjustment

3-5-4. Pedestal Level Adjustment
Lens iris:
Equipment:
Close “C”
Oscilloscope,
Verctorscope (MAX GAIN)
To be extended: PR-209 board
Preparation:
e GAIN switch/camera side > 0 dB
e $14(ADJ)/SW-724 board — “ON”
Test point:
TP503(GND:E1)/PR-209 board
Adjustment Procedure
1.
PR-209/DUS-841 BOARD
(VA GAIN)
RO CI TP101
Rv202
WA eou TP201
Test point: TP503(GND:E1)/PR-209 board
Adjusting point: @RV506(G PED)/PR-209 board
Pedestal Level “A”
= 25+2 mV (for NTSC)
= 30 + 2 mV (for PAL)
Specification:
Adjust @RV406 (R PED) and @RV606 (B PED)/PR-209
board so that the black beam spot is in the center of the
vectorscope.
[for NTSC] [for PAL]
~ COMPONENT SIDE —
RV407
(PRE CLIP) @
AV405
4019 8 Adv)
qP4o1] oe
on
RV401 TP402 (Ry BAL)
(RGAIN) @ Bras
RV505
$5016 » any
RVSO1
(GGaIn) @ aioe
TP601 RvV60S
seo oc 7 ADJ)
TPs02 OB ony
RV5O4
Oe 7 BAL)
OL601
sor RV I01 4 Rv301 sé ste RVS06
(RFLARE) } (BFLARE} (MATRIX) (G PED)
FLARE) RV406 RvV606
re @ R PEDO o 05 PED)
3-10
3-5-5. Gamma Balance and Gamma Set
Object:
Equipment:
Pre-adjustment
Grayscale chart
Oscilloscope, Waveform monitor,
Verctorscope
To be extended: PR-209 board
Preparation:
e GAIN switch/camera side — 0 dB
e WHITE BAL switch/camera side > A
Trigger:
pin A24/extension board
Adjustment Procedure
1.
2.
14.
15.
16.
17.
Chart frame = Underscanned monitor frame
Test point: pin B20 (GND:B1)/extension board
Adjusting point: Lens iris
Specification: 500+10mV
500 + 10 mV
Connect the probe of oscilloscope to TP503 (GND: E1)/
PR-209 board.
$501 (G y SW) /PR-209 board“OFF”
Adjust @RV501 (G GAIN)/PR-209 board so that the white
level is 1550 + 20 mV.
$501 (G y SW) /PR-209 board—“ON”
Adjust @RV504 (G yBAL)/PR-209 board so that the white
level is 1550 + 20 mV.
Connect the probe of oscilloscope to TP403 (GND: E1)/
PR-209 board.
$401 (R y SW) /PR-209 board—‘OFF”
. Adjust @RV401 (R GAIN)/PR-209 board so that the white
level is 1550 + 20 mV.
. $401 (R ySW) /PR-209 board—>“ON”
. Adjust @RV404 (R y BAL)/PR-209 board so that the white
level is 1550 + 20 mV.
. Connect the probe of oscilloscope to TP603 (GND: E1)/
PR-209 board.
S601 (B y SW) /PR-209 board—“OFF”
Adjust @RV601 (B GAIN)/PR-209 board so that the white
level is 1550 + 20 mV.
$601 (B y SW) /PR-209 board—‘ON”
Adjust @RV604 (B y BAL)/PR-209 board so that the white
level is 1550 + 20 mV.
1550 + 20m
DXC-637 (UC)
DXC-637P (Ek)