Chassis Picture Quality Adjustment; White Level Adjustment - Sony KF-60DX100 Service Manual

3-2.

CHASSIS PICTURE QUALITY ADJUSTMENT

3-2-1. White Level Adjustment

1. Preparation
1) Before adjustment, set the following adjustment conditions
in each mode.
Note: After the adjustment in 3-2-1. White Level Adjustment, restore
original data in each mode.
Adjustment conditions
Category
P-BOOST1 0
MCP-ADJ1 2
3
VID ADJ 1
2
3
2) Connect an oscilloscope to the CN702 pin 3 (TP743) on the
BB board.
2. RF Input Adjustment
1) Enter the RF color bar (75%) signal, and set the PICTURE
MODE to "Vivid".
2) Set the adjustment conditions in 1. Preparation, and further
set the following data.
Adjustment conditions
Category
2103-1 22
23
2103-2 22
23
3) Press the [TWIN] button on the remote commander to display
color bar on the left and right two screens.
4) Measure the waveform, and adjust so that a difference
between black level and white level is 1.2 Vp-p ±1 STEP.
Adjustment positions
Category
Left screen 2103-1
Right screen 2103-2
1.2 Vp-p
Item Data
BSET 0
GDRV 50
GCUT 40
GAM 0
DCTN 0
DPIC 0
Item Data
ATPD 0
DCTR 0
ATPD 0
DCTR 0
tem
2 SCON
2 SCON
5) After the adjustment finished, return the data set in 2) to
original values, and write the data by pressing the [MUTE] +
[ENTER] buttons on the remote commander.
3. Video Input Adjustment
1) Enter the Video STEP (100%) signal (including 0IRE and
100IRE), and set the PICTURE MODE to "Vivid".
2) Set the adjustment conditions in 1. Preparation, and further
set the following data.
Adjustment conditions
Category
2103-1
2103-2
3) Press the [TWIN] button on the remote commander to display
the STEP signal on the left and right two screens.
4) Measure the waveform, and adjust so that a difference
between black level and white level is 1.5 Vp-p ±1 STEP.
Adjustment positions
Left screen
Right screen
1.5 Vp-p
5) After the adjustment finished, return the data set in 2) to
original values, and write the data by pressing the [MUTE] +
[ENTER] buttons on the remote commander.
– 39 –
KF-60DX100
Item Data
22 ATPD 0
23 DCTR 0
22 ATPD 0
23 DCTR 0
Category tem
2103-1 2 SCON
2103-2 2 SCON
RM-Y910