Picture Quality Adjustments; Display Position Adjustment - Sony TRINITRON KV-LX34M50 Service Manual

KV-LX34M50
RM-871

5-3. PICTURE QUALITY ADJUSTMENTS

SUB CONTRAST ADJUSTMENT (SCN)
1. Receive a PAL color-bar.
2. Set service item 40 GON and 41 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 32 SCN using 1 and 4 of the
commander, then adjust to 2.25 ± 0.05V using 3 and 6.
[MUTING]
5. Press
6. Receive a NTSC color-bar and adjust 32 SCN as step 2 to 5.
7. Set service item 40 GON and 41 BON to data "01".
White
SUB COLOR ADJUSTMENT (SC1 & SC2)
1. Input a PAL color-bar.
2. Set service item 4B NLA to data "00".
Set to the following condition:
PICTURE 100%, BRIGHTNESS 50%, COLOR 50%
Remark: Adjustment must be done with both P1 & B1 boards
fitted.
3. Connect an oscilloscope to the pin 4 (B OUT) of CN117, A
board.
4. Set to Service Mode and select 33 SC1 with 1 and 4 of the
commander then adjust to VB2=VB3=VB4 with 3 and 6.
[MUTING]
5. Press
6. Write 34 SC2 data same as 33 SC1 data.
7. Set service item 4B NLA to data "05" and write the data.
VB1 VB2
- of the commander to write the data.
2.25 ± 0.05 Vp-p
Black
- of the commander to write the data.
VB3 VB4
VB2 = VB3 = VB4
SUB HUE ADJUSTMENT (SH1 & SH2)
1. Receive a NTSC 3.58 color-bar.
2. Set the following condition:
PICTURE 100%, BRIGHTNESS 50%, COLOR 50%, HUE 0%
3. Connect an oscilloscope to the pin 4 (B OUT) of CN117, A
board.
4. Select 36 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
5. Write the data 1 step down from adjusted data.
6. Write data as below onto 35 SH1: 35 SH1 = 36 SH2 (Written
data) - 3

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 5C POH with the 1 and 4 on the commander and set
the data "14" with 3 and 6.
5. Select 5D POV to set the data "27"
[MUTING]
6. Press
7. Check by changing the PIP position using the on-screen menu.
– 32 –
VB1 VB2 VB3 VB4
- on the commander to write the data.