Sony DXC-637 - R-ch;B-ch Gamma Balance Fine Adjustment

18. Test point:
19.
20.
21.
22.
23.
24.
25.
26.
TP503 (GND:E1)/PR-209 board
@RV505 (G GAMMA)/PR-209 board
Cross point level = 880 + 10 mV
Adjusting point:
Specification:
Test point: TP403 (GND:E1)/PR-209 board
Adjusting point: @RV405 (R GAMMA)/PR-209 board
Specification: | Cross point level = 880 + 10 mV
Test point: TP603 (GND:E1)/PR-209 board
@RV605 (B GAMMA)/PR-209 board
Cross point level
Adjusting point:
Specification: = 880+ 10 mV
880 + 10 mV |
Cover the Jens with lens cap.
Test point: TP503 (GND:E1)/PR-209 board
Adjusting point: @RV506 (G PED)/PR-209 board
Specification: Pedestal level “A”
= 25+5 mV (for NTSC)
= 30 +5 mV (for PAL)
TP403 (GND:E1)/PR-209 board
@RV406 (R PED)/PR-209 board
Pedestal level “A”
= 25+5 mV (for NTSC)
= 30 +5 mV (for PAL)
TP603 (GND:E1)/PR-209 board
@RV606 (B PED)/PR-209 board
Pedestal level “A”
= 25+5 mV (for NTSC)
= 30 +5 mV (for PAL)
Test point:
Adjusting point:
Specification:
Test point:
Adjusting point:
Specification:
Remove the lens cap.
Repeat procedure 3 to 25 severai times.
3-5-6. R-ch/B-ch Gamma Balance Fine Adjustment
Note:
Be sure that “3-5-5. Gamma Balance and-Gamma Set Pre-
adjustment” is completed.
Object:
Equipment:
Grayscale chart
Oscilloscope,
Verctorscope (MAX GAIN)
To be extended: PR-209 board
Adjustment Procedure
1.
2.
3.
Chart frame = Underscanned monitor frame
Confirm that the video level at TP502 (GND: E1)/PR-209
board is 500 + 10 mV.
Test point: VIDEO OUT
Adjusting point: @RV405 (R GAMMA ADJ)/PR-209
board
@RV605 (B GAMMA ADJ)/PR-209
board
Adjust the above controls alternately
so that the beam spot is in the center
on the verctorscope screen.
Adjustment:
[for NTSC]
[for PAL]
27. Do not adjust the iris control and proceed to “3-5-6. R-ch/
B-ch Gamma Balance Fine Adjustment”.
DXC-637 (UC)
DXC-637P (EK)
Oa
Test point: VIDEO OUT
Adjusting point: @RV404 (R GAMMA BAL)/PR-209
board
@RV604 (B GAMMA BAL)/PR-209
board
Adjustment: Adjust the above controls alternately
so that the beam spotis in the center on
the verctorscope screen.
Cover the lens with lens cap.
Test point: VIDEO OUT
Adjusting point: @RV406 (R PED)/PR-209 board
@RVE60E (B PED)/PR-209 board
Adjust the above controls alternately
so that the beam spot is in the center on
the verctorscope screen.
Adjustment: