Picture Quality Adjustments - Sony KV-EX29M87 Service Manual

7-3. PICTURE QUALITY ADJUSTMENTS

PICTURE ADJUSTMENT
1. Set to service mode.
2. Set A/V control to HI-FINE.
3. Set the following condition.
Adjustment condition
SAJ 00 PIC
06 DYC
0E CLO
10 HUO 07
JGL 04 BBT
05 LML 03
ECO MODE
WIDE MODE
DRC-MF
MEASUREMENT POINT
VR : R100 (the pin 6 of CN1100)
VB : B100 (the pin 7 of CN1100)
CAUTION
After Adjustment, these adjustment parameters must be
recovered to the original condition.
Original Condition
SAJ 00 PIC
06 DYC
50 TV 50 VIDEO
0E CLO 09
1O HUO 08
JGL 04 BBT
05 LML 00
1. DRIVE ADJUSTMENT (VIDEO MODE)
Input signal : PAL Color bar/NTSC Color Bar, to Video 1 [Service]
mode.
(i) SUB CONTRAST
Condition : SAJ 00
02
JGL 01
Adjusting parameter:
YCT 08 YOL
2. DRIVE ADJUSTMENT (RF MODE)
Input signal : PAL Color bar/NTSC Color Bar HI-FINE Mode.
(i) SUB CONTRAST
Condition : SAJ 00
02
JGL 01
Adjusting parameter:
YCT 04
3F
00
06
00
: OFF
: OFF
: DRC1250 (KV-EX29M87)
DRC1050 (KV-EX29N93)
28 HI-FINE
0 HI-FINE
60 TV 60 VIDEO
08 09 09
08 09 09
03
PIC 3F
COL 00
RGB 04
PIC 3F
COL 00
RGB 04
SCT
(ii) Copy SCT data to NTSC (RF MODE/PAL)
VR
VR1 - VR2 = ∆VR = 2.35 ± 0.07 (Vp-p) (KV-EX29M87)
VR1 - VR2 = VR = 1.85 ± 0.07 (Vp-p) (KV-EX29N93)
SUB HUE/COL ADJUSTMENT
1. SUB HUE/SUB COL (VIDEO MODE)
Input signal : NTSC Color bar HI-FINE Mode.
Condition : SAJ
JGL
SAJ
Adjusting parameter:
YCT
YCT
After the adjustment SAJ 10 HUO 9
2. SUB HUE/SUB COL (NTSC RF MODE)
Input signal : NTSC Color bar.
Condition : SAJ
JGL
SAJ
Adjusting parameter:
YCT
YCT
NTSC
VB1 VB2 VB3
VB1 = VB4 ± 70 mV
VB2 = VB3 ± 70 mV
3. SUB COLOR ADJUSTMENT (PAL RF MODE)
(KV-EX29M87)
Input signal : RF PAL Color bar HI-FINE Mode.
Condition : SAJ
JGL
Adjusting parameter:
YCT
PAL
VB1 VB2 VB3
– 67 –
KV-EX29M87/EX29N93
RM-963
VR2
GND
02 COL 1F
01 RGB 07
10 HUO 07
0A COL
00 TNT
02 COL 1F
01 RGB 07
10 HUO 07
03 SCL
00 TNT
VB4
02 COL 1F
01 RGB 07
03 SCL
VB4
VB1 = VB2 = VB3
RM-966