Sony TRINITRON KV-LX34M50, Руководство по обслуживанию

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– 32 –
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
.
5. Press
[MUTING] →
-
of the commander to write the data.
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".
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
VB1 = VB2 = VB3 = VB4
White
Black
2.25
±
0.05 Vp-p
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
.
5. Press
[MUTING] →
-
of the commander to write the data.
6. Write 34 SC2 data same as 33 SC1 data.
7. Set service item 4B NLA to data "05" and write the data.
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"
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
VB2 = VB3 = VB4