Sony RM-916, Service Manual

Page: 57 / 138

– 57 –
KV-ES29M90
RM-916
5-3. PICTURE QUALITY ADJUSTMENTS
SUB COLOR ADJUSTMENT (SCL)
1. Set to service mode.
2. Input RF PAL colorbar signal.
Set A/V control to PERSONAL.
3. Set to VP7 (Service mode) "DYC" = 0
4. Set the following condition.
Picture to 100%, Color to 0% and Bright to 0%.
5. Connect an oscilloscope to the pin
3
(BLUE) of CN705, C
board.
6. Using the
1
and
4
buttons select SAJ 3 (Service mode)
"SCL".
7. Using the
3
and
6
buttons on the Remote Commander to
adjust to VB2 = VB3 = VB4 with
3
and
6
.
8. Write into the memory by pressing "MUTING" then "0".
9. Input NTSC colorbar signal to VIDEO1 and select VIDEO1
input.
10. Adjust as step 4. and 8. by receving NTSC colorbar.
11. Reset to VP 7 (Service mode) "DYC" = 1.
-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 3F
00 DYC 0
0E CLO 7
10 HUO 7
13 PIO 0
JGL 04 BBT 0
05 LML 3
PICTURE QUALITY : HI-FINE
ECO MODE : OFF
WIDE MODE : OFF
DRC-MF : DRC1250
INPUT SIGNAL
Video Color Bar (White and Color 75%)
RF Color Bar (White and Color 75%)
CAUTION
After the above Adjustments, these adjustment parameters must be
recovered to the original condition.
VR ; R100 (the pin 6 of CN1100)
VB ; B100 (the pin 7 of CN1100)
1. NTSC VIDEO INPUT
Input signal ; NTSC color bar, 75% to Video 1.
[TWIN] mode, [Service] mode.
(i) SUB CONTRAST
Condition : SAJ 00 PIC 3F
02 COL 0
JGL 01 RGB 4
SAJ 13 PIO 0
Adjusting parameter:
LEFT ; YCT 08 YOL
RIGHT ; SYC 08 YOL
VR
VR2
GND
VR1 - VR2 = VR = 1.88 ± 0.07 (Vp-p)
(ii) SUB HUE/SUB COL
Condition : SAJ 02 COL 1F
JGL 01 RGB 7
SAJ 10 HUO 7
Adjusting parameter:
LEFT ; YCT 0A COL
YCT 00 TNT
RIGHT ; SYC 0A COL
SYC 00 TNT
VB1 VB2 VB3
VB4
VB1 = VB4 ± 50 mV
VB2 = VB3 ± 50 mV