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 Subcoloradjustment (Dac-Uvsh, Uvsc) - Sony KP 48S75 Service Manual

5-1. TV INPUT SUB CONTRAST ADJUSTMENT
(VPNT-SCON)
1. Receive the color-bar signal.
2. Mode
PICTURE
COLOR
BRIGHTNESS
TRINITONE
SERVICE DATA VPNT SCON : 7
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. 5-1
5-2. 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
TRINITONE
SERVICE DATA VPNT-SHUE
SERVICE DATA VPNT-SCOL
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. 5-2
SECTION 5

CIRCUIT ADJUSTMENTS

: Personal 1 or 2.
: maximum
: maximum
: center
: medium
White
1.80 0.05Vp-p
Black
: Personal 1 or 2.
: maximum
: center
: center
: medium
: 7
: 7
VB3 VB4
5-3. 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
TRINITONE
SERVICE DATA DAC UVSH
SERVICE DATA DAC UVSC
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
5-4. P & P SUB CONTRAST ADJUSTMENT
(SC-SYDR)
1. Receive the signal.
TV terminal (sub)
VIDEO terminal (main) : no signal
2. Set to service mode and set to P & P mode.
3. Connect an oscilloscope between pin 7 of CN204 (A board)
and ground.
4. Select " SC-SYDR ", and adjust so that the wave from level
is 1.65 0.05Vp-p.
5. Write the data into memory.
MUTING n ENTER
– 49 –
KP-43T75/48S75/
53N77/53S75/61S75
: Personal 1 or 2.
: maximum
: center
: center
: medium
: 31
: 31
VB1 VB2 VB3 VB4
Fig. 5-3
: color-bar signal
White
1.65 0.05Vp-p
Black
Fig. 5-4
RM-Y906