Picture Quality Adjustments - Sony TRINITRON KV-ES38N90 Service Manual

KV-ES38N90
RM-958

6-3. PICTURE QUALITY ADJUSTMENTS

H-TRAPIZIUM ADJUSTMENT
1. Input a cross hatch/dot signal.
2. Adjust DAC 4 HTR to make H-Trapizoid distortion best.
SUB CONTRAST, SUB HUE, SUB COLOR
Adjustment condition
SAJ 00
06
0E
10
13
JGL 04
05
PICTURE QUALITY : HI-FINE
ECO MODE
WIDE MODE
DRC-MF
INPUT SIGNAL
Video Color Bar (White and Color 75%)
RF Color Bar (White and Color 75%)
MEASUREMENT POINT
VR ; R100 (the pin 6 of CN1100 at A board)
VB ; B100 (the pin 7 of CN1100 at A board)
CAUTION
After the above Adjustment, these adjustment parameters must
be recovered to the original condition.
Original condition
SAJ 00
SAJ 06
50 TV
OE CLO 9
10 HUO 8
13 PIO
JGL 04
05
1. NTSC VIDEO IN PUT
Input signal ; NTSC color bar, 75% to Video 1.
[TWIN] mode, [Service] mode.
(i) SUB CONTRAST
Condition : SAJ
JGL
SAJ
Adjusting parameter:
LEFT
RIGHT ;
VR1
VR1 - VR2 = VR = 1.85 ± 0.07 (Vp-p)
PIC 3F
DYC 0
CLO 6
HUO 7
PIO 0
BBT 0
LML 3
: OFF
: OFF
: DRC1050
PIC 28 HI-FINE
DYC 0 HI-FINE
50 VIDEO 60 TV 60 VIDEO
8 6
8 9
TWIN = 3
BBT 3
LML 0
00 PIC 3F
02 COL 0
01 RGB 4
13 PIO 0
; YCT 08 YOL
SYC 08 YOL
VR2
GND
(ii) SUB HUE/SUB COL
Condition :
Adjusting parameter:
2. NTSC RF INPUT
Input signal ; NTSC RF color bar, 75%.
[TWIN] mode, [Service] mode.
(i) SUB CONTRAST
Condition :
Adjusting parameter:
6
VR1
9
VR1 - VR2 = VR = 1.85 ± 0.07 (Vp-p)
(ii) SUB HUE/SUB COL
Condition :
Adjusting parameter:
– 56 –
SAJ 02 COL 1F
JGL 01 RGB 7
SAJ 10 HUO 7
LEFT ; YCT 0A COL
YCT 00 TNT
RIGHT ; SYC 0A COL
SYC 00 TNT
VB4
VB1 VB2 VB3
VB1 = VB4 ± 70 mV
VB2 = VB3 ± 70 mV
SAJ 00 PIC 3F
02 COL 0
JGL 01 RGB 4
LEFT ; YCT 04 SCT
RIGHT ; SYC 04 SCT
VR2
GND
SAJ 02 COL 1F
JGL 01 RGB 7
SAJ 10 HUO 7
LEFT ; YCT 03 SCL
YCT 00 TNT
RIGHT ; SYC 03 SCL
SYC 00 TNT
VB4
VB1 VB2 VB3
VB1 = VB4 ± 70 mV
VB2 = VB3 ± 70 mV