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Circuit Adjustments; Tv Input Sub Contrast Adjustment (vpnt-scon); Video Input Sub-hue And Sub-color Adjustment (vpnt-shue, Scol); Component Input Sub-hue And Sub-color Adjustment (dac-uvsh, Uvsc) - Sony KP-XA43N90J Service Manual

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4-1. TV INPUT SUB CONTRAST ADJUSTMENT
(VPNT-SCON)
1. Receive the color-bar signal.
2. Mode
PICTURE
COLOR
BRIGHTNESS
COLORTEMP
SERVICE DATA VPNT SCON
3. Set to service mode.
4. Connect an oscilloscope between pin 7 of CN204 (A board)
and ground.
5. Select " VPNT-SCON ", and adjust so that the wave from
level is 1.80 ± 0.05Vp-p.
6. Write the data into memory.
MUTING n ENTER
Fig. 4-1
4-2. VIDEO INPUT SUB-HUE AND SUB-COLOR
ADJUSTMENT (VPNT-SHUE, SCOL)
1. Select VIDEO1 input and supply the color-bar signal.
2. Mode
PICTURE
COLOR
BRIGHTNESS
COLORTEMP
3. Set to service mode.
4. Connect an oscilloscope between pin 5 of CN204 (A board)
connecter and ground.
5. Select " VPNT-SHUE, SCOL ", and adjust them to have VB1
= VB4 and VB2 = VB3 in the waveform levels.
6. Increase SCOL by 2 steps.
7. Write the data into memory.
MUTING n ENTER
VB1
VB2
Fig. 4-2
SECTION 4

CIRCUIT ADJUSTMENTS

: Personal 1 or 2.
: maximum
: minimum
: center
: neutral
: 7
White
±
1.80
0.05Vp-p
Black
: Personal 1 or 2.
: maximum
: center
: center
: neutral
VB3
VB4
4-3. COMPONENT INPUT SUB-HUE AND SUB-COLOR
ADJUSTMENT (DAC-UVSH, UVSC)
1. Select VIDEO 4 and supply the color-bar signal.
VIDEO input
2. Mode
PICTURE
COLOR
BRIGHTNESS
COLORTEMP
3. Set to service mode.
4. Connect an oscilloscope between pin 5 of CN204 (A board)
connecter and ground.
5. Select " DAC-UVSH, UVSC ", and adjust them to have VB1
= VB4 and VB2 = VB3 in the waveform levels.
6. Write the data into memory.
MUTING n ENTER
4-4. PIP SUB CONTRAST ADJUSTMENT
(PYC-PSCN)
1. Receive the signal.
TV terminal (sub)
VIDEO terminal (main) : no signal
2. Mode
PICTURE
COLOR
BRIGHTNESS
COLORTEMP
3. Set to service mode and set to PIP mode.
4. Connect an oscilloscope between pin 7 of CN204 (A board)
and ground.
5. Select " PYC-PSCN ", and adjust so that the wave from level
is 1.65 ± 0.05Vp-p.
6. Write the data into memory.
MUTING n ENTER
– 21 –
KP-XA43N90J
: Personal 1 or 2.
: maximum
: center
: center
: neutral
VB1
VB2
VB3
VB4
Fig. 4-3
: color-bar signal
: Personal 1 or 2.
: maximum
: minimum
: center
: neutral
White
1.65
±
0.05Vp-p
Black
Fig. 4-4
RM-Y906

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