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Circuit Adjustments; P & P Sub Contrast Adjustment (video) (scon); P & P Sub Contrast Adjustment (rf) (scon); P & P Sub-hue And Sub-color Adjustment (shue, Scol) - Sony KP-51HW40 Service Manual

Color rear video projector.
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4-1. P & P SUB CONTRAST ADJUSTMENT
(VIDEO) (SCON)
1. Receive the signal.
TV terminal (sub)
: Color-bar (white-75%, 7.5%
VIDEO terminal (main) : Color-bar (white-75%, 7.5%
2. VIDEO MODE
: Pro
PICTURE
: maximum
COLOR
: minimum
RGB Signal
: off
3. Set to P & P mode, and set to service mode.
4. Connect an oscilloscope between the check point and ground.
Check points
: CN13 pin C20 (Main)
(A Board)
: CN13 pin A19 (Sub)
5. Select " 2103-1-02 "(Main scon), and adjust so that the wave-
form level of VWB is 1.11 ± 0.03Vp-p.
6. Select " 2103-2-02 "(Sub scon), and adjust so that the wave-
form level of VWB is 1.15 ± 0.03Vp-p.
7. Write the data into memory.
MUTING n ENTER
Black
Fig. 4-1
4-2. P & P SUB CONTRAST ADJUSTMENT (RF)
(SCON)
1. Receive the signal.
TV terminal (sub)
: Color-bar (white-75%, 7.5%
VIDEO terminal (main) : Color-bar (white-75%, 7.5%
2. VIDEO MODE
: Pro
PICTURE
: maximum
COLOR
: minimum
RGB Signal
: off
3. Set to P & P mode, and set to service mode.
4. Connect an oscilloscope between the check point and ground.
Check points
: CN13 pin C20 (Main)
(A Board)
: CN13 pin A19 (Sub)
5. Select " 2103-1-02 "(Main scon), and adjust so that the wave-
form level of VWB is 1.11 ± 0.03Vp-p.
6. Select " 2103-2-02 "(Sub scon), and adjust so that the wave-
form level of VWB is 1.15 ± 0.03Vp-p.
7. Write the data into memory.
MUTING n ENTER
Black
Fig. 4-2
SECTION 4

CIRCUIT ADJUSTMENTS

setup)
setup)
White
VWB
setup)
setup)
White
VWB
4-3. P & P SUB-HUE AND SUB-COLOR ADJUSTMENT
(SHUE, SCOL)
1. Receive the signal.
TV terminal (sub)
VIDEO terminal (main) : : Color-bar (white-75%, 7.5%
2. VIDEO MODE
PICTURE
COLOR
RGB Signal
3. Set to P & P mode, set to service mode.
4. Connect an oscilloscope between pin 3 of CN702 (A board)
connecter and ground.
5. Select " 2103-1-03 SCOL, -04 SHUE "(Main), and adjust
< =
them to have VB1
levels.
6. Select " 2103-2-03 SCOL, -04 SHUE "(Sub), and adjust them
< =
to have VB1 VB4 and VB2 VB3 in the waveform levels.
7. Write the data into memory.
MUTING n ENTER
4-4. P & P SUB-HUE AND SUB-COLOR ADJUSTMENT
(SHUE, SCOL)
1. Receive the signal.
TV terminal (main)
VIDEO terminal (sub) : Color-bar (white-75%, 7.5%
2. VIDEO MODE
PICTURE
COLOR
RGB Signal
3. Set to P & P mode, set to service mode.
4. Connect an oscilloscope between pin 3 of CN702 (A board)
connecter and ground.
5. Select " 2103-1-03 SCOL, -04 SHUE "(Main), and adjust
< =
them to have VB1
levels.
6. Select " 2103-2-03 SCOL, -04 SHUE "(Sub), and adjust them
< =
to have VB1 VB4 and VB2 VB3 in the waveform levels.
7. Write the data into memory.
MUTING n ENTER
– 31 –
KP-51HW40/57HW40
RM-Y909
: Color-bar (white-75%, 7.5%
setup)
setup)
: Pro
: maximum
: center
: on
< =
VB4 and VB2
VB3 in the waveform
< =
VB1
VB2
VB3
VB4
Fig. 4-3
: Color-bar (white-75%, 7.5%
setup)
setup)
: Pro
: maximum
: center
: on
< =
VB4 and VB2
VB3 in the waveform
< =
VB1
VB2
VB3
VB4
Fig. 4-4
RM-Y909

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