Sony KP-41T65C, Service Manual

Page: 47 / 88

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SECTION 5
CIRCUIT ADJUSTMENTS
5-6. P IN P SUB CONTRAST ADJUSTMENT
(PCON)
1. Receive the color-bar signal.
2. PICTURE
: maximum
COLOR : minimum
BRIGHTNESS : minimum
3. Set to service mode.
4. Connect an oscilloscope between
9
pin of CN303 (A Board)
and ground.
5. Select “ PCON ” and adjust so that waveform level is
1.55
±
0.1Vp-p.
6. Write the data into memory.
MUTING
n
ENTER
White White
Black Black
MAIN SCREEN PIP SCREEN
1.55
±
0.1
1.55
±
0.1
Fig. 5-5
5-7. P IN P SUB HUE, SUB COLOR ADJUSTMENT
(IHUE, ICOL)
1. Receive the color-bar signal.
2. PICTURE
: maximum
COLOR : center
BRIGHTNESS : center
3. Set to service mode.
4. Connect an oscilloscope between
5
pin of CN303 (A Board)
and ground.
5. Select “ IHUE ” and “ ICOL ” , adjust them to have VB1 = VB4
and VB2 = VB3 in the waveform levels.
6. Raise “ ICOL ” data 1 steps higher.
7. Write the data into memory.
MUTING n ENTER
Fig. 5-6
VB1 VB2 VB3 VB4