Picture Quality Adjustment; P Max/Contrast Adjustment; Sub Color Adjustment; Sub Hue Adjustment - Sony TRINITRON KV-21FS140 Service Manual

KV-21FS140
RM-YA005
3-3.

PICTURE QUALITY ADJUSTMENT

3-3-1. P MAX/CONTRAST ADJUSTMENT

1. Set TV to Video mode.
2. Set Picture mode to "CUSTOM".
3. Input PAL 100% CB to TV set (OTHERS), NTSC 75%
CB (NTSC model).
4. Set PICT 003 "PWL" to 00h WHBL 017 "BLBG" to 01h.
5. Set the following condition:
PICTURE 100%, COLOR 0%, BRIGHTNESS 50%
6. Connect an oscilloscope to pin 4 (R Output) of CN004.
7. Select SADJ 000 "PMAX" with 1 and 4 button of the
commander then adjust VR with spec with 3 and 6
until reach the spec below:
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 = NTSC models VM models
1.10 ± 0.03 Vp-p = For 21" NTSC non VM models
8. Select Wide Mode to "ON" in TV and Video mode and
write "PMAX" data - 8 steps
(for models with V-Compression features only).
9. Then press [MUTING] t - to write the data.
10. Select "PWL" and "BLBG" back to initial data.
("PWL": 01h and "BLBG": 00h)
11. Then press [MUTING] t - again to write the data.

3-3-2. SUB COLOR ADJUSTMENT

1. Set TV to Video mode.
2. Set Picture mode to "Custom".
3. Input PAL 100% Color Bar(CB) to TV set (OTHER
MODEL).
4. INPUT NTSC 75% CB to TV set (NTSC MODEL).
5. Set PICT 006 "WTS" to 00h and Intelligent Picture to
"OFF".
6. Set the following condition:
PICTURE 50%, COLOR 50%, BRIGHTNESS 50%, HUE
50%, SHARPNESS 50%
7. Connect an oscilloscope to pin 2 (B Output) of CN004.
8. Select SADJ 004 "SCOL" with 1 and 4 button of the
commander then adjust with 3 and 6 so that
V =V =V (for PAL), and V
B2 B3 B4
write in the data +5 step offset.
VB1
VB2 VB3 VB4
VB2 = VB3 = VB4 (for PAL)
9. Then press [MUTING] t - to write the data.
10. Set "WTS" back to original data and Intelligent Picture to
"ON".
11. Copy no.9 data to PAL TV & DVD mode (OTHER
MODEL) and NTSC TV & DVD mode (NTSC MODEL)
VR
Black
=V (for NTSC) then
B1 B4
VB1 VB2 VB3 VB4
VB1 = VB4 (for NTSC)
(Difference is within 70mV)

3-3-3. SUB HUE ADJUSTMENT

1. Set TV to Video mode.
2. Set Picture mode to "CUSTOM".
3. Input NTSC 3.58 CB to TV set.
4. Set the following condition:
PICTURE 50%, COLOR 50%, BRIGHTNESS 50%,
HUE 50%, SHARPNESS 50%
5. Select service mode and - 5 step offset from SADJ 004
"SCOL" using 1 and 3 button of the remote
commander.
6. Connect oscilloscope to pin 2 (B output) of CN004.
7. Set to service mode and select SADJ 001 "SHUE" with
1 and 4 button then adjust to V
3 and 6 button.
8. Press [MUTING] t - to write the data.
9. Select service mode SADJ 004 "SCOL" and +5 step
offset and write the data using [MUTING] t -.
10. Select TV channel with 3.58 and repeat item (3) to (7)
and +1 step data offset.(NTSC model)
11. Press [MUTING] t - to write the data.
12. For single system model with NTSC 4.43, select TV
channel with NTSC 4.43 and repeat item (3) to (8).
VB1
The highest level of V
must be aligned at the same time.
The ideal difference between
V
13. Once adjustment is completed in Video mode, carry out
adjustment in DVD mode. Set TV to DVD mode. Input
NTSC 3.58 CB to DVD set and perform step 4 to 9 and
11.

3-3-4. SUB BRIGHT ADJUSTMENT

1. Set TV to RF mode.
2. Input PAL monoscope to RF mode.
3. Set Brightness 50% and Picture to "MINIMUM".
4. Select WHBL 010 "SBRT" with 1 and 4 button of the
remote commander and adjust its data with 3 and 6
so that cut-off level is 10 IRE, slightly glimmer: 20 IRE.
5. Write into the memory by pressing [MUTING] t -.
3-4.

GEOMETRY ADJUSTMENT

Geometry adjustment must be done for both color systems
PAL and NTSC.

3-4-1. GENERAL SETTING

a) Input Monoscope or Special Color Bar(SPCB) signal
using a pattern generator.
b) Set to Service Mode.
c) Select Category/Functionally Name (as in the service
list) using 1 and 4 button on the remote commander.
Eg. GEOM
d) Raise or Lower the data value using 3 and 6 button.
e) Press [MUTING] t - to save the data into memory.
Note 1: Geometry Adjustment must be performed for 4 different
modes: PAL 50Hz NORMAL MODE, PAL 50Hz WIDE
MODE, NTSC 60Hz NORMAL MODE, NTSC 60Hz
WIDE MODE.
– 28 –
=V =V
B1 B2
VB3 VB4
80mV
VB2
, V , V , V
B1 B2 B3 B4
is within ± 80mV
and V
B2 B3
=V with
B3 B4