Panasonic TX-43P250 / TX-51P250 / TC-43P250 / TC-51P250 Service Manual ▷ View online
8.3.3.
V-Amp, V-Linear and V-Pos
Adjustment
Adjustment
1. Adjust Vertical amplitude for 2.5 ± 0.1 division of a scale by
V-Amp control.
2. Confirm Vertical Linear as to the balance of circle, if need
adjust V-Linear control.
3. Confirm Vertical Center, if it is not correct, adjust
Monoscope pattern for center of the screen by V-Pos
control.
control.
8.3.4.
Parabola and Trapezoid
Adjustment
Adjustment
1. Receive NTSC cross hatch pattern.
2. Adjust the vertical line to straight line by Parabola control.
3. Adjust the vertical line to straight line of both side Vertical
line by Trapezoid control.
8.4.
NTSC 120Hz mode (120i)
8.4.1.
Preparation
1. Receive PAL monoscope pattern.
2. Copy the Data of to NTSC Progressive mode (60p) to
NTSC 120Hz mode (120i).
3. Set the Picture Menu to NORMAL.
4. Set scan mode to 120Hz.
5. Set the TV to Service Mode 1.
6. Set the Data of Service Mode 1 as follow
H-Parallel
8
Bottom-Corner
21
V-Linear
30
V-S-Correct
10
Top-Corner
20
C-Correct
4
7. Push [ 0 ] button so that set the Data of Coarse/Fine
Convergence to Zero Correction.
8. Push [ HELP ] button so that projecting Green only.
8.4.2.
V-Amp, V-Linear and V-Pos
Adjustment
Adjustment
1. Adjust Vertical amplitude for 2.5 ±0.1 division of a scale by
V-Amp control.
2. Confirm Vertical Linear as to the balance of circle, if need
adjust V-Linear control.
3. Confirm Vertical Center, if it is not correct, adjust
Monoscope pattern for center of the screen by V-Pos
control.
control.
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TX-43P250 / TX-51P250 / TC-43P250 / TC-51P250
8.5.
525p Deflection Adjustment /
Confirmation
Confirmation
8.5.1.
V / H-Deflection confirmation
1. Receive 525p signal.
2. Confirm V / H-Deflection is normal.
8.5.2.
H-Pos confirmation / Adjustment
1. Receive 525p signal.
2. Confirm H-Pos and if need, adjust H-Pos.
8.6.
625p Deflection Adjustment /
Confirmation
Confirmation
8.6.1.
V / H-Deflection confirmation
1. Receive 625p signal.
2. Confirm V / H-Deflection is normal
8.6.2.
H-Pos confirmation / Adjustment
1. Receive 625p signal.
2. Confirm H-Pos and if need, adjust H-Pos.
22
TX-43P250 / TX-51P250 / TC-43P250 / TC-51P250
9 Adjustment Procedure
9.1.
SECAM Black Level Adjustment
Preparation
Picture Menu: Dynamic
AI: ON
Adjustment
1. Receive SECAM white pattern.
2. Connect an oscilloscope to A44 pin 39(B-Y OUT) on A-Board.
3. Adjust SECAM B-Y so that H-blanking time and colour center are equal level.
4. Connect an oscilloscope to A44 pin 41(R-Y OUT) on A-Board.
5. Adjust SECAM R-Y so that H-blanking time and colour center are equal level.
6. Connect an oscilloscope to A44 pin 39(B-Y OUT) on A-Board.
7. Adjust Sub SECAM B-Y so that H-blanking time and colour center are equal level.
8. Connect an oscilloscope to A44 pin 41(R-Y OUT) on A-Board.
9. Adjust Sub SECAM R-Y so that H-blanking time and colour center are equal level.
23
TX-43P250 / TX-51P250 / TC-43P250 / TC-51P250
9.2.
Cut off Adjustment
Preparation
Picture Menu : Dynamic
WB-B-G-ST1 : 255
C Temp : Standard
High-RGB : 128
AI : ON
Low-RGB : 640
P-NR : ON
Cut off : A8
Scan Mode : 100Hz (PAL) G-Limit : 255
Screen VR : Full Counterclockwise
B-Limit : 255
Adjustment
1. Receive a Black Level pattern.
2. Connect an oscilloscope to TPLG1 on LG-Board.
3. Adjust Sub Bright so that the waveform A is 200 ± 2V.
4. Connect an oscilloscope to TPLR1 on LR-Board.
5. Adjust Low-R so that the waveform A is 200 ± 2V.
6. Connect an oscilloscope to TPLB1 on LB-Board.
7. Adjust Low-B so that the waveform A is 200 ? 2V.
8. It pushes and it makes a [HELP] key the project only of GREEN.
9. The 6th paragraph shines faintly with the screen VR of GREEN and the 7th paragraph does to the sinking style.
10. It pushes and it makes a [HELP] key the project only of RED.
11. The paragraph shines faintly with the screen VR of RED and the 7th paragraph does to the sinking style.
12. It pushes and it makes a [HELP] key the project only of BLUE.
13. The 6th paragraph shines faintly with the screen VR of BLUE and the 7th paragraph does to the sinking style.
24
TX-43P250 / TX-51P250 / TC-43P250 / TC-51P250
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