Sony KV-EF29N90, Service Manual

Page: 38 / 90

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KV-EF29N90
RM-882
5-3. PICTURE QUALITY ADJUSTMENTS
SUB CONTRAST ADJUSTMENT (SNC)
1. Receive a NTSC color-bar with 100 IRE.
2. Set service item 42 GON and 43 BON to data “00”. Set the
PICTURE 100%, BRIGHTNESS 50% and COLOR MIN.
3. Connect an oscilloscope to the pin
6
(R OUT) of CN117, A
board.
4. Set to Service Mode and select 34 SCN using
1
and
4
of
the commander, then adjust to 2.25 ± 0.05 V using
3
and
6
.
5. Press
[MUTING]
→
-
of the commander to write the data.
6. Receive a NTSC color-bar and adjust 34 SCN as step 2 to 5.
7. Set service item 42 GON and 43 BON to data ”01”.
Black
White
2.25
±
0.05 Vp-p
SUB COLOR ADJUSTMENT (SCO)
1. Input a NTSC color-bar.
2. Set service item 4D NLA to data “00”.
Set to the following condition:
PICTURE 100%, BRIGHTNESS 50%, COLOR 50%
3. Connect an oscilloscope to the pin
4
(B OUT) of CN117, A
board.
4. Set to Service Mode and select 35 SC1 with
1
and
4
of the
commander then adjust to VB2=VB3=VB4 with
3
and
6
.
5. Press
[MUTING]
→
-
of the commander to write the data.
6. Adjust 36 SC2 as step 2 to 5 when receiving NTSC color-
bar.
7. Set service item 4D NLA to data “05” and write the data.
SUB HUE ADJUSTMENT (SH2)
1. Select Video 1.
2. Input a NTSC color-bar, video into video 1.
3. Set the following condition:
PICTURE 100%, BRIGHTNESS 50%, COLOR 50%.
4. Connect an oscilloscope to the pin
4
(B OUT) of CN117,
A board.
5. Select 38 SH2 with
1
and
4
of the commander by setting
to Service Mode and adjust to VB1=VB2=VB3=VB4 with
3
and
6
.
6. Press
[MUTING]
→
-
of the commander to write the data.
5-4. DISPLAY POSITION ADJUSTMENT
PIP POSITION (POH, POV)
1. Receive a PAL color-bar.
2. Set the PIP picture by pressing PIP button on the commander.
3. Set to Service Mode.
4. Select 5F POH with the
1
and
4
on the commander and
set the data “14” with
3
and
6
.
5. Select 60 POV to set the data “27”.
6. Press
[MUTING]
→
-
on the commander to write the data.
7. Check by changing the PIP position using the on-screen menu.
VB1 VB2 VB3 VB4
VB1 = VB2 = VB3 = VB4
VB1 VB2 VB3 VB4
VB2 = VB3 = VB4