Picture Quality Adjustments - Sony TRINITRON KV-ES34M81 Service Manual

5-3. 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 PIC
06 DYC
0E CLO
10 HUO 7
13 PIO
JGL 04 BBT
05 LML 3
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 PIC 28
SAJ 06 DYC 0
50 TV 50 VIDEO
OE CLO 9 8
10 HUO 8 8
13 PIO TWIN = 7
JGL 04 BBT 3
05 LML 0
3F
0
6
0
0
: OFF
: OFF
: DRC1250
HI-FINE
HI-FINE
60 TV 60 VIDEO
9 9
9 9
– 61 –
1. NTSC VIDEO INPUT
Input signal ; NTSC color bar, 75% to Video 1.
[TWIN] mode, [Service] mode.
(i) SUB CONTRAST
Condition : SAJ 00
02
JGL 01
SAJ 13
Adjusting parameter:
LEFT ;
RIGHT ;
VR1
VR1 - VR2 = 1.85 ± 0.07 (Vp-p)
(ii) SUB HUE/SUB COL
Condition : SAJ 02
JGL 01
SAJ 10
Adjusting parameter:
LEFT ;
RIGHT ;
VB1 VB2 VB3
VB1 = VB4 ± 70 mV
VB2 = VB3 ± 70 mV
KV-ES34M81/ES34M91
PIC 3F
COL 0
RGB 4
PIO 0
YCT 08 YOL
SYC 08 YOL
VR2
GND
COL 1F
RGB 7
HUO 7
YCT 0A COL
YCT 00 TNT
SYC 0A COL
SYC 00 TNT
VB4
RM-916