Picture Quality Adjustments; Display Position Adjustments - Sony TRINITRON KV-EF29N6A Service Manual

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.
→ - of the commander to write the data.
[MUTING]
5. Press
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".
White
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.
→ - of the commander to write the data.
[MUTING]
5. Press
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.
VB1 VB2
VB2 = VB3 = VB4
2.25 ± 0.05 Vp-p
Black
VB3 VB4
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.
VB1 = VB2 = VB3 = VB4
→ - of the commander to write the data.
[MUTING]
6. Press
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".
→ - on the commander to write the data.
[MUTING]
6. Press
7. Check by changing the PIP position using the on-screen menu.
– 37 –
KV-EF29N6A/EF29N6B/EF29N9P
VB1 VB2 VB3 VB4
RM-882