Text preview for : 05_Alignment & Adjustment.pdf part of Samsung LW20M21C Servicemanual
Back to : LW20M21C-2.rar | Home
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.
LW17M24C/LW20M21C
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
INFO
Menu
- If you have Factory remote - control
4-2-2 Factory Mode Tree
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 8. Bus Stop 9. Check Sum 10. Reset
T- V N C 1 7 ( 2 0 ) - P E U - 0 0 0 3 2 0 0 4 / 0 4 / 2 0
0 o ff 0
1. Calibration
V C Ti PC
Calibration V CTi Enter
( 1) RF, VIDE O, S - VIDEO : Factory Mode
(2) 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) Factory Mode Calibr ation PC Enter
(3) check 4.ADC of Factory Mode. Adjustment can be done as below. _ Value variation can be + 10~20.
4-2
LW17M24C/LW20M21C
4 Alignments and Adjustments
2. Option
1 . Vi d e o M u t e 2. Auto Power 3. Panel 4. Inch 5. Antenna Osd 6. TTXList/Flof 7. Auto FM 8. Acc/ACM 9. Gamma LUT 10. ESM 11 . S y s t e m
O On XGA 15 o ff Flof On 1 O On CW
3. W/B(1)
R level G level B level R gain G gain B gain g Sub Color g S u b Ti n t Recall
128 128 128 127 127 127 0 50
3. W/B(2)
Adjustment item Red level Green level Blue level Red Gain Green Gain Blue Gain gSUB Color gSUB T int Factory Recall ADJ[0~255] ADJ[0~255] FIX[0~255] FIX[0~255] ADJ[0~255] ADJ[0~255] FIX[0~255] FIX[0~255] * A/S : Micom RF [I nitial Data] 128 128 128 128 128 128 0 50 RF [Ad just Data] 128 128 128 135 135 135 0 50 Remark
LW17M24C
Blue level 118FIX Red Gain 162FIX
LW20M21C
Blue level 119FIX Red Gain 136FIX
I nitial Data Write
LW17M24C/LW20M21C
4-3
4 Alignments and Adjustments
4. ADC
Roff set Goff set Boff set Rg ain0 Rg ain1 Gg ain0 Gg ain1 Bg ain0 Bg ain1
VCTi FIX[0~127] FIX[0~127] FIX[0~127]
FI X [0~255] FI X[0 ~ 1] FI X[ 0~255] FI X[0 ~ 1] FI X[ 0~255] FI X[0 ~ 1]
PC 46 66 68 251 0 255 0 253 0 Roff set Goff set Boff set Rg ain0 Rg ain1 Gg ain0 Gg ain1 Bg ain0 Bg ain1 FIX[0~127] FIX[0~127] FIX[0~127]
FI X [0~255] FI X[0 ~ 1] FI X[ 0~255] FI X[0 ~ 1] FI X [0~255] FI X[0 ~ 1]
50 54 44 115 1 120 1 114 1
5. VCT
R Drive G Drive B Drive Sub Contrast Sub Bright Sub Sharp Sub Color S u b Ti n t Sub Coring
255 255 255 44 0 15 7 50 5
RF AGC Vpeaking CTI Gain CTI Coring LMIXOFS PKCF AGCADJ1 LT I G a i n
0 6 3 5 6 3 32 15
6. ACC/ ACM
Y Max D Y Scl Thr Y Scl A Y Scl B A Ctrl A Snslp T Dixel Lower End Mid Start Mid End
7 64 5 0 0 8 12 80 30 100
Up Start Low Sn Thr Up Sn Thr Y Min Y Max Ym Div Slp Fr Age Fr App Esm Ctrl
40 60 0 10 255 128 1 0 127
4-4
LW17M24C/LW20M21C
4 Alignments and Adjustments
7. Test Pattern ( Test Pattern of VCTi)
1) 2) 3) 4) 5) 6) 7) VCTi Toshiba Gray Bar Gray Green Color Bar 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-VNC17(20) PEU-0003 2004/04/20
- Display the MICOM program version.
4-2-3 White Balance
LW17M24C High 285, 295 x, y LW20M21C High 285, 295 x, y Low 280, 295 x, y Low 285, 295 x, y
LW17M24C/LW20M21C
4-5