KV-BT212M80 (serv.man3) - Sony TV Service Manual (repair manual). Page 30

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KV-BT212M80
   RM-W101
3-3.
PICTURE QUALITY ADJUSTMENTS
PMAX/CONTRAST ADJUSTMENT
1. Select Video Mode.
2. Input PAL CB to TV set (others), Input NTSC 75% CB
to TV set (NTSC model).
3. Set PICT 003 "PWL" to 00h and WHBL 017 "BLBG" to
01h.
4. Set the following condition:
PICTURE 100%, COLOR 0%, BRIGHTNESS 50%.
5. Connect an oscilloscope to pin 4 (R output) of CN004.
6. Set to Service Mode "PWL" to 00h, "BLBG" to 01h.
7. Select SADJ 000 "PMAX" with 
1
 and 
4
 of the
commander then adjust VR within spec with 
3
 and 
6
.
8. Select "WIDE" Mode for TV and Video Mode, write
the "PMAX DATA-8 steps" (For models with
V-Compression features only).
9. Then press [MUTING] 
t 
-
 to write the data.
10. Set "PWL" and "BLBG" back to initial data respectively.
(PWL: 01h and BLBG: 00h)
SUB COLOR ADJUSTMENT
1. Select Video and set Picture mode.
2. Input PAL 100% CB to TV set (others), Input NTSC
75% CB to TV set (NTSC model).
3. Set PICT 006 "WTS" to 00h, and Intelligent Picture to
"OFF".
4. Set the following condition:
PICTURE 100%, COLOR 50%, BRIGHTNESS 50%,
HUE CENTER, SHP 50%.
5. Connect an oscilloscope to pin 2 (B output) of CN004.
6. Select to Service Mode and adjust SADJ 004 "SCOL"
with 
1
 and 
4
 of commander then adjust to
VB2 = VB3 = VB4 with 
3
 and 
6
, and write in the
data as +10 step with +5 step offset.
7. Then press [MUTING] 
t 
-
 to write the data.
8. Set "WTS" back to original data, and set Intelligent
Picture to "ON".
SUB HUE ADJUSTMENT
1. Select Video.
2. Input NTSC 3.58 Color Bar to TV set.
3. Set the following condition:
PICTURE 100%, COLOR 50%, BRIGHTNESS 50%,
HUE Center, SHR 50%.
4. Connect an oscilloscope to pin 2 (B output) of CN004.
5. Set to service mode and select SADJ 001 "SHUE"
with 
1
 and 
4
 of commander then adjust to
VB1=VB2=VB3=VB4 with 
3
 and 
6
.
6. Then press [MUTING] 
t 
-
 to write the data.
7. Select TV channel and repeat 4-6(Except GA NTSC
model)
8. i Select TV channel with 3.58 repeat 4-5, +1 step data
offset (applied to GA NTSC models)
    ii.Then press [MUTING] 
t 
-
 to write the data.
9.For single system models with NTSC 4.43 select TV
channel with NTSC 4.43 repeat item 4-6.
The highest level of VB1, VB2, VB3, VB4 must be
aligned at the same time.
The ideal difference between VB2 and VB3 is within
±80mV.
3-4.
DEFLECTION ADJUSTMENT
H-TRAPEZOID ADJUSTMENT
1. Receive cross hatch/dotsignal.
2. Adjust on to make H-Trapezoid distortion best.
NORMAL MODE (50Hz)
1. Set to Service Mode.
2. Input SPCB Signal.
3. Using the 
1
 and 
4
 button select GEOM (Service
Mode).
4. Rasie/lower data using the 
3
 and 
6
 buttons adjust
the following items:-
GEOM :
000
HPOS
Horizontal Shift (HS)
001
HPAR
Horizontal Parallelogram
002
HBOW
Horizontal Bow
003
VLIN
Vertical Linearity
004
VSCR
Vertical Scroll
005
HSIZ
EW Width (EW)
006
EWPW
EW Parabola/Width (PW)
007
UCOP
EW Upper Corner Parabola
008
LCOP
EW Lower Corner Parabola
009
EWTZ
EW Trapezium
010
VSLP
Vertical Slope (VS)
011
VSIZ
Vertical Amplitude
012
SCOR
S-Correction (SC)
013
VPOS
Vertical Shift (VSH)
014
HBL
RGB Blanking Mode
015
WBF
Timing of Wide Blanking (WBF)
016
WBR
Timing of Wide Blanking (WBR)
017
SBL
Service Blanking
018
COPY
Copy the GEOM data to all
50/60Hz NVM area
VB2 = VB3 = VB4 (For PAL sub color adjustment)
VB1 = VB4 (For NTSC sub color adjustment)
(Difference is within 70mV)
VB1
VB2 VB3 VB4
VR
Black
1.46 
± 0.03 Vp-p = for 21" without VM models
1.65 
± 0.03 Vp-p = with VM models except NTSC models
1.23 
± 0.03 Vp-p = for NTSC models VM models
1.10 
± 0.03 Vp-p = for 21" NTSC non VM models
1.46 
± 0.03 Vp-p = for 14" models
1.10 
± 0.03 Vp-p = for 14" NTSC models
VB1
VB2
80mV
VB3 VB4
Display
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