Sony KP-48V75 - 48" Color Rear Video Projector, Service Manual

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KP-48V75/53V75/61V75
RM-Y903 RM-Y903 RM-Y903
KP-48V75/53V75/61V75
RM-Y903 RM-Y903
RM-Y903 SECTION 5
CIRCUIT ADJUSTMENTS
MEMO
KP-48V75/53V75/61V75
RM-Y903 RM-Y903 RM-Y903
5-7. P IN P SUB HUE, SUB COLOR ADJUSTMENT
(MSHU, SSHU, MSCL, SSCL)
1. Receive the 75% white color bars pattern signal.
2. PICTURE
: maximum
COLOR : center
TRINITONE : medium
3. Set to P & P ( ) mode, and to service mode.
4. Connect an oscilloscope between pin
5
of CN305 (A Board)
and ground.
5. Select “ MSHU ” , “ SSHU ” , “ MSCL ” and “ SSCL”, and
make adjustment sub hue and sub color so that the wave form
shows X1 = Y1 and X2 = Y2.
6. Raise “ UVSC ” data 8 steps higher.
7. Write the data into memory.
MUTING n ENTER
X2
Y2 PY2 PY1
X1
Y1
X1 = Y1
X2 = Y2
PY1 = PY2 = 750
±
30mV.
5-6. P IN P SUB CONTRAST ADJUSTMENT
(MSCN, SCON)
1. Receive the 75% white color bars pattern signal.
2. PICTURE
: maximum
COLOR : minimum
BRIGHTNESS : center
TRINITONE
: medium
3. Set to P & P ( ) mode, and to service mode.
4. Connect an oscilloscope between pin 4 of CN305 (A Board)
and ground.
5. Open pin
7
of CN301 (A Board).
6. Select “ MSCN ” and “ SCON ”, adjust them to have PY1 =
PY2 ( 470
±
20mV) in the wave form levels.
7. Write the data into memory.
MUTING
n
ENTER
PY1 = PY2 = 470
±
20mV.
PY1
(FROM PEDESTAL
TO PEEK)
PY2
Fig. 5-5
Fig. 5-6
5-4. SUB-HUE AND SUB-COLOR ADJUSTMENT
(SHUE, SCOL)
1. Receive the 75% white color bars pattern signal.
2. PICTURE
: maximum
COLOR : center
BRIGHTNESS : center
TRINITONE
: medium
3. Set to service mode.
4. Connect an oscilloscope between pin
7
of CN004 (A Board)
connecter and ground.
5. Select “ SHUE ” and “ SCOL ”, and adjust them to have
VB1 = VB4 and VB2 = VB3 in the wave form levels.
6. Raise “ SCOL ” data 0 steps higher.
7. Write the data into memory.
MUTING n ENTER
5-1. RF AGC
1. Input the 75% white color bars pattern signal.
2. Adjust AGC VR of TU1101 so that snow noise, and
crossmodulation disapper from the picture.
3. Verify picture quality on each channel.
5-2. BAR DISPLAY ADJUSTMENT (DISP)
1. Receive the cross-hatch signal.
2. Set to Service mode.
3. Select “ DISP ”, and adjust so that the blank spaces on the
both sides of picture bar become equal.
4. Write the data into memory.
MUTING
n
ENTER
A B A=B
Fig. 5-1
5-3. SUB CONTRAST ADJUSTMENT (SCON)
1. Receive the 75% white color bars pattern signal.
2. PICTURE
: maximum
COLOR : minimum
BRIGHTNESS : center
TRINITONE
: medium
RON---1 GON---0 BON---0
3. Set to service mode.
4. Connect an oscilloscope between pin
6 of CN004 (A Board)
and ground.
5. Select “ SCON ”, and adjust so that the wave form level is
1.75
±
0.05Vp-p.
6. Write the data into memory.
MUTING n ENTER
White
1.75
±
0.05Vp-p
Black
Fig. 5-2
VB1 VB2 VB3 VB4
Fig. 5-3
5-5. DVD INPUT SUB HUE, SUB COLOR ADJUSTMENT
(UVSH, UVSC)
1. Select video 4 input.
2. PICTURE
: maximum
COLOR : center
BRIGHTNESS : center
TRINITONE
: medium
3. Set to service mode.
4. Connect an oscilloscope between pin
5
of CN303 (A Board)
and ground.
5. Select “ UVSH ” and “ UVSC ” , adjust them to have VB1 =
VB4 and VB2 = VB3 in the wave form levels.
6. Write the data into memory.
MUTING n ENTER
Fig. 5-4
VB1 VB2 VB3 VB4