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4 Alignments and Adjustments
4 Alignments and Adjustments
4-1 General Alignment Instuction
1. Usually, a color TV-VCR needs only slight touch-up adjustment upon installation.
Check the basic characteristics such as height, horizontal and vertical sync.
2. Use the specified test equipment or its equivalent.
3. Correct impedance matching is essential.
4. Avoid overload. Excessive signal from a sweep generator might overload the front-end of the TV.
When inserting signal markers, do not allow the marker generator to distort test result.
5. Connect the TV only to an DC power source with voltage and frequency as specified on
the backcover nameplate.
6. Do not attempt to connect or disconnect any wire while the TV is turned on.
Make sure that the power cord is disconnected before replacing any parts.
7. To protect aganist shock hazard, use an isolation transform.
LTP1745/LTP1745U/LTP2045 4-1
4 Alignments and Adjustments
4-2 Factory Mode Adjustments
4-2-1 Entering Factory Mode
1. To enter "Service Mode" Press the remote -control keys in this sequence :
- If you do not have Factory remote - control
- If you have Factory remote - control
4-2-2 Factory Mode Tree (U.S. Only)
1. Calibration
2. Option
3. W/B
4. ADC
5 . V C Ti 1 2 7
6. ACC/ACM
7 . Te s t P a t t e r n 0
8. Bus Stop off
9. Check Sum 0
10. Reset
T- V N C N U S - 0 0 1 6 2 0 0 4 / 0 1 / 3 1
1. Calibration V C Ti
Component
PC
2. Option 1 . Vi d e o M u t e O
2. Auto Power On
3. Panel XGA
4. Inch 15
5. Antenna Osd o ff
6. High Deviation o ff
7 . V- C h i p USA
8. Acc/ACM O
9. Gamma LUT O
10. ESM On
4-2 LTP1745/LTP1745U/LTP2045
4 Alignments and Adjustments
3. W/B(1) R level 128
G level 128
B level 128
R gain 127
G gain 127
B gain 127
g Sub Color 0
g Sub Tint 50
Recall
3. W/B(2)
RF RF
Adjustment item [Initial Data] [Adjust Data] Remark
Red level ADJ[0~255] 128 128
Green level ADJ[0~255] 128 128 Blue level 128 FIX
Blue level FIX[0~255] 128 128
Red Gain FIX[0~255] 128 135
Green Gain ADJ[0~255] 128 135 Red Gain 135 FIX
Blue Gain ADJ[0~255] 128 135 `
gSUB Color FIX[0~255] 0 0
gSUB Tint FIX[0~255] 50 50
Factory Recall *A/S : Micom Initial Data Write
Item Dynamic Cool 1 Remark
M ODE RF[ADJ] COMPONENT 480i COMPONENT 480P PC
External input External input External input External input * W/B connot be
Signal Source ABL Patter n ABL Pattern ABL Pattern ABL Pattern
adjusted in
[MSPG925LTH] [MSPG925LTH] [MSPG925LTH] [M SPG925LTH]
COMPONENT &PC
W/B Process High x=270+ 2, y=270+ 2
_ _ Cannot be adjustment Cannot be adjustment Cannot be adjustment
* Only x,y axes can
Adjustment SPEC Low x=270+ 2, y=270+ 2
_ _ Cannot be adjustment Cannot be adjustment Cannot be adjustment be adusted in
High & Low Light
High x=270+ 10, y=270 + 10 , Y=22. 0
_ _ [ FL] x=270+ 20, y=270 + 20
_
_ x=270 + 20, y=275 + 20
_ _ x=250 + 30, y=260+ 30
_ _
W/B
SPEC Low x=270+ 10, y=270 + 10 , Y=0. 3 0. 1 [ FL]
_ _ _
x=260 + 20, y=260 + 20
_ x=280 + 20, y=290 + 20
_ _ x=250 + 30, y=255+ 30
_ _
LTP1745/LTP1745U/LTP2045 4-3
4 Alignments and Adjustments
4. ADC V C Ti Compenent PC
R o ff s e t 53 R o ff s e t 11 3 R o ff s e t 66
G o ff s e t 43 G o ff s e t 85 G o ff s e t 63
B o ff s e t 47 B o ff s e t 83 B o ff s e t 51
R gain 0 125 R gain 0 207 R gain 0 54
R gain 1 1 R gain 1 1 R gain 1 1
G gain 0 122 G gain 0 31 G gain 0 62
G gain 1 1 G gain 1 1 G gain 1 1
B gain 0 134 B gain 0 205 B gain 0 66
B gain 1 1 B gain 1 1 B gain 1 1
5. VCT R Drive 255 RF AGC 0
G Drive 255 Vpeaking 6
B Drive 255 CTI Gain 3
Sub Contrast 44 CTI Coring 5
Sub Bright 0 LMIXOFS 6
Sub Sharp 15 PKCF 3
Sub Color 7 AGCADJ1 32
S u b Ti n t 50 LT I G a i n 15
Sub Coring 5
6. ACC/ ACM Y Max D 7 Up Start 40
Y Scl Thr 64 Low Sn Thr 60
Y Scl A 5 Up Sn Thr 0
Y Scl B 0 Y Min 10
A Ctrl 0 Y Max 255
A Snslp 8 Ym Div Slp 128
T Dixel 12 Fr Age 1
Lower End 80 Fr App 0
Mid Start 30 Esm Ctrl 127
Mid End 100
4-4 LTP1745/LTP1745U/LTP2045
4 Alignments and Adjustments
7. Test Pattern ( Test Pattern of VCTi)
1) VCTi
2) Toshiba
3) Gray Bar
4) Gray
5) Green
6) Color Bar
7) Cross
8. Bus Stop
- Bus stop is used data communication.
9. Chcek Sum
- Display the current check sum size of the MICOM.
10. Reset
- Initializes the data in the MICOM.
11. T-VNCNUS-0016 2004/01/31
- Display the MICOM program version.
4-2-3 White Balance
High Low
270, 270 270, 270
x, y x, y
LTP1745/LTP1745U/LTP2045 4-5
4 Alignments and Adjustments
4-2-4 Calibration
( 1) RF, VIDE O, S - VI DEO : Factory Mode Calibration V CTi Enter
(2) Compoent : adjust in 16 Gray Pattern of 480p.
Based on Master device (VIDEO SIGNAL GENERATOR MSPG-925F)
after adjusting to 16 Gray Pattern (Model : 212, Pattern : 17)
Fac tory M od e Calibration Component Enter
(3) PC : adjust in VGA MODE.
Based on Master device (VI DEO SIGNAL GENERATOR M SPG-925F)
execute Auto Adjustment in Cross Hatch (also called Combination) (Model : 10, Pattern : 25)
After adjusting 16 Gray Pattern (Model : 10, Pattern : 17)
Fac tory Mode Calibr ation PC Enter
(4) check 4.ADC of Factory Mode. Adjustment can be done as below.
Value variation can be + 10~20.
_
VCTi Component PC
Roff set FIX[0~127] 46 Roff set FIX[0~127] 64 Roff set FIX[0~127] 50
Goff set FIX[0~127] 66 Goff set FIX[0~127] 86 Goff set FIX[0~127] 54
Boff set FIX[0~127] 68 Boff set FIX[0~127] 64 Boff set FIX[0~127] 44
Rg ain0 FI X[ 0~255] 251 Rgain0 FI X[ 0~255] 215 Rg ain0 FI X[ 0~255] 115
Rg ain1 FI X[ 0 ~ 1] 0 Rgain1 FI X[ 0 ~ 1] 1 Rg ain1 FI X[ 0 ~ 1] 1
Gg ain0 FI X[ 0~255] 255 Gg ain0 FI X[ 0~255] 247 Gg ain0 FI X[ 0~255] 120
Gg ain1 FI X[ 0 ~ 1] 0 Gg ain1 FI X[ 0 ~ 1] 0 Gg ain1 FI X[ 0 ~ 1] 1
Bg ain0 FI X[ 0~255] 253 Bg ain0 FI X[ 0~255] 215 Bg ain0 FI X[ 0~255] 114
Bg ain1 FI X[ 0 ~ 1] 0 Bg ain1 FI X[ 0 ~ 1] 1 Bg ain1 FI X[ 0 ~ 1] 1
4-6 LTP1745/LTP1745U/LTP2045