SAMSUNG CS29M6HP8, CS-25M6HNQ, CW29A8VHE8XXEC Service Manual

Alignment and Adjustments
Samsung Electronics 4-1
4. Alignment and Adjustments
4-1 General Alignment Instructions
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 and focus.
2. Observe the picture for good black and white details. There should be objectionable color shading; if color shading is present, demagnetize, perform purity and convergence adjustments described below.
3. Use the specified test equipment or its equivalent.
4. Correct impedance matching is essential.
5. 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 results.
6. Connect the TV only to an AC power source with voltage and frequency as specified on the backcover nameplate.
7. Do not attempt to connect or disconnect any wires while the TV is turned on. Make sure that the power cord is disconnected before replacing any parts.
8. To protect against shock hazard, use an isolation transformer.
4-2 Automatic Degaussing
A degaussing coil is mounted around the picture tube, so that external degaussing after moving the TV should be unnecessary. But the receiver must be properly degaussed upon installation.
The degaussing coil operates for about 1 second after the power is switched ON. If the set is moved or turned in a different direction, the power should be OFF for at least 10 minutes.
If the chassis or parts of the cabinet become magnetized, poor color purity will result. If this happens, use an external degaussing coil. Slowly move the degaussing coil around the faceplate of the picture tube and the sides and front of the receiver. Slowly withdraw the coil to a distance of about 6 feet before turning power OFF.
If color shading persists, perform the following Color purity and Convergence adjustments.
4-3 High voltage Check
CAUTION : There is no high voltage adjustment on this chassis. The B+ power supply should be +135 volts (with full color- bar input and normal picture level).
1. Connect a digital voltmeter to the second anode of the picture tube.
2. Turn on the TV. Set the Brightness and Contrast controls to minimum (zero beam current).
3. Adjust the Brightness and contrast controls to both extremes. Ensure that the high voltage does not exceed 32 KV under any conditions.
Alignment and Adjustments
4-2 Samsung Electronics
4-5 SCREEN Adjustment
1. Input Toshiba Pattern
2. Enter “Service Mode”.(Refer to “Service Mode”)
3. Select “G2-Adjust”.
4. Set the values as example(Refer to page4-17).
4-4 Dynamic Focus Adjustment
1. A dynamic focus adjustment should be done after replacing the CRT PCB, FBT or CRT.
2. Input a crosshatch pattern.
3. Enter “ STANDARD “ in video mode.
4. Turn the Dynamic focus VR fully clockwise (maximum).( )
5. Turn the Static focus VR fully counterclockwise (maximum).( )
6. Slowly turn the static focus VR counterclockwise. Adjust until the vertical line in the middle of the screen has maximum clarity.( )
7. Slowly turn the dynamic focus VR (clockwise) and adjust the 3rd horizontal line for maximum clarity.( )
8. Repeat 4-7, if necessary.
ex) IBRM = 220
WDRV = 35 CDL = 220 COLR G B = 150 150 150
STATIC FOCUS VR
H
DYNAMIC FOCUS VR
V
SCREEN
<FBT FOCUS PACK>
Alignment and Adjustments
Samsung Electronics 4-3
5. Turn the SCREEN VR until “MRCR G B” and “MRWDG” are green and those value are about 100. (The incorrect SCREEN Voltage may result that “MRCR G B” and “MRWDG” should be red)
When you do not have Toshiba Pattern, follow this method.
1. Set the TV on the condition that AV mode no signal(black)
2. Enter the “Menu” and set the mode to blue screen off.
3. Enter the “Service Mode”.
4. Select “ G2-Adjust”.
5. Set the values as example(Refer to page4-17).
ex) IBRM = 220
WDRV = 35 CDL = 220 COLR G B = 150 150 150
6. Turn the SCREEN VR until the value of “ MRCR G B” is about 120. Do not mind that the “OSD” Color is red.
After completing G2-Adjust, follow this procedure.
Enter the “Video Adjust 1”.Choose any item in menu. (ex. Select “Red Cutoff”)Change the value of item you select, and recover the value.
For example, when the value of “Red Cutoff” is 127, change the value to 128 and restore the value to 127.
If you do not follow this procedure, the picture may be abnormal. For example, when the TV set is on, the picture becames brighter gradually.
Note 1.
Alignment and Adjustments
4-4 Samsung Electronics
4-6 E2PROM (IC902) Replacement
1. When IC902 is replaced, all adjustment data revert to the initial values. So, all adjustment values when servicing should be readjusted.
2. After IC902 is replaced, connect the AC power supply cord.
3. Turn the power switch ON.
4. In stand-by, warm up the TV for at least 10 seconds.
5. Power on the TV.
4-7 White Balance Adjustment
Equipment : Color-Analyzer (CA-100)
Input Signal : Pattern signal (Toshiba pattern)
1. Select STANDARD from the menu.
2. Input an 100% White pattern.
3. Enter the “Service Mode”. (Refer to “4-8 Service Mode”)
4. Warm up the TV set at least for 30 minutes.
5. Input a Toshiba pattern signal.
6. Enter the “Video Adjust1”.
- Adjust “Sub Contrast” so that Y (luminance) becomes 40 ft ± 3.
- Use “Red Drive” and “ Blue Drive” to adjust High-Light (x : 290, y : 300)
- Adjust “Sub Bright” so that Y (luminance) becomes 1.3ft ± 0.3.
- Use “Red Cutoff” and “Blue Cutoff” to adjust Low-Light (x : 290, y : 300).
7. Adjust CA-100 so that the final adjustment value can be fixed.
8. Use the Channel Up/Down (▲/▼) buttons to move the cursor on the adjustment modes.
9. Use the Volume +/- buttons to change the adjustment value.
Alignment and Adjustments
Samsung Electronics 4-5
4-8 Factory Adjustment
1. To enter the “Service Mode”, Press the remote-control keys in this sequence :
- If you do not have Factory remote-control
- If you have Factory remote-control
2. After the Service Mode is entered, the initial screen is as shown in the figure below.
3. Use the Channel Up/Down buttons to move the cursor in the adjustment parameters.
- When CRT, CRT PCB, FBT, E
2
PROM (sometimes MICOM) is replaced, the adjustment values
should be controlled.
- After the Service adjustment is completed, Do not select “Reset” in the service mode menu.
(After above procedure is done, power is on initially and the “Plug and Play” will be operated.)
4-8-1 Service Mode
*
These hexa digits are check sum value which depends on the MICOM. If check sum value is changed, the value of
E
2
PROM Data newly initialed.
Note 2.
PICTURE OFF PICTURE ON
PICTURE ON
Service
Deflection Video Adjust 1 Video Adjust 2 Video Adjust 3 Option(81h 0Ch) Reset G2-Adjust Others
DISPLAY
DISPLAY
*
()
()
MENU
FACTORY
MUTE
Alignment and Adjustments
4-6 Samsung Electronics
4-8-2 Memory Data
4-8-2(A) DEFLECTION (GEOMETRIC ADJUSTMENT VALUE)
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
OSD
V Amp
V Shift
V Slope
V SC
H EW
H Trapizium
H Parabola
H Corner U
H Corner L
H Shift
BOW
Amgle
H Corner U6
H Corner L6
V Max
Zoom1 Amp
Zoom2 Amp
Zoom Trap
H-QEW
Zoom 4:3 Para
4:3~16:9 Para
Range
0 ~255
0 ~255
0 ~255
0 ~255
0 ~255
0 ~255
0 ~255
0 ~255
0 ~255
0 ~255
0 ~255
0 ~255
0 ~255
0 ~255
0 ~255
0 ~255
0 ~255
0 ~255
0 ~255
0 ~255
0 ~255
Function
Adjusts Vertical picture size. Adjusts 4:4 upper and lower picture size in a lion head pattern at factory.
Adjusts Vertical picture position
Adjust Vertical Slope Correction
Adjusts Vertical s-correction
Horizontal east west width. Adjusts 5:5 left and right picture size in a lion head pattern at factory.
Adjusts horizontal Trapezium.
Adjusts Horizontal Parabola.
Adjusts the top horizontal corner of picture. Adjusts so that the top of H corner can be linear.
Adjusts the bottom horizontal corner of picture. Adjusts so that the bottom of H corner can be linear.
Adjusts Horizontal Position
Adjusts Horizontal BOW
Adjusts Horizontal Angle
Adjusts so that the top horizontal corner of picture can be linear
Adjusts so that the bottom horizontal corner of picture can be linear
Adjusts Max value of vertical amplitude
Adjusts vertical amplitude in zoom1
SIM-806HEW only.
Adjusts horizontal Trapezium in Zoom
Short for Q-CRT HORIZNOTAL EAST WEST,data used for only Q-CRT MODEL. In NORMAL mode,horizontal picture size is within 5 ~ 5.5.In Q mode, horizontal picture size is within 6.5 ~ 7. This H QEW function sets the gap between horizontal picture size in NORMAL mode and horizontal picture size in Q mode.
Corrects the vertical linearity in Zoom mode of P-SIZE. The data depends on CRT (see data above).
Corrects the vertical linearity in 16:9 mode of P-SIZE.. The data depends on CRT (see data above).
Remark
Adjust
Adjust
Adjust
Fix
Adjust
Adjust
Adjust
Fix
Fix
Adjust
Adjust
Adjust
Adjust
Fix
Fix
Fix
Fix
Fix
Alignment and Adjustments
Samsung Electronics 4-7
V Amp V Shift V Slope V SC H EW H Trapizium H Parabola H Corner L H Corner L H Shift BOW Amgle H Corner U6 H Corner L6 V Max Zoom1 Amp Zoom2 Amp Zoom Trap H-QEW Zoom 4:3 Para 4:3~16:9 Para
V Amp V Shift V Slope V SC H EW H Trapizium H Parabola H Corner L H Corner L H Shift BOW Amgle H Corner U6 H Corner L6 V Max Zoom1 Amp Zoom2 Amp Zoom Trap H-QEW Zoom 4:3 Para 4:3~16:9 Para
RANGEOSD
0 ~ 255 0 ~ 255 0 ~ 255 0 ~ 255 0 ~ 255 0 ~ 255 0 ~ 255 0 ~ 255 0 ~ 255 0 ~ 255 0 ~ 255 0 ~ 255 0 ~ 255 0 ~ 255 0 ~ 255 0 ~ 255 0 ~ 255 0 ~ 255 0 ~ 255 0 ~ 255 0 ~ 255
RANGEOSD
0 ~ 255 0 ~ 255 0 ~ 255 0 ~ 255 0 ~ 255 0 ~ 255 0 ~ 255 0 ~ 255 0 ~ 255 0 ~ 255 0 ~ 255 0 ~ 255 0 ~ 255 0 ~ 255 0 ~ 255 0 ~ 255 0 ~ 255 0 ~ 255 0 ~ 255 0 ~ 255 0 ~ 255
INITIAL DATA
SIM-806HEW
32W8VH
Philips
Invar Flat
80 104 125 117 125
85
65
45
88 185 132 129 176 176 128 150 202 128
-
-
-
32W8VH Thomson
Invar Flat
92 111 130 225 215 113
96 121 122 170 130 140
76
78 128 143 173 128 128
-
-
28C7VH
Thomson
Invar 2.0R
85 108 130 200 205
91
65 118 136 174 123 129 140 136 213 180 202 128
-
-
-
28C7H
Thomson
AK 2.0R
129 110 130 200 187 114
91 118 136 180 123 129 133 129 213 180 202 128 128
-
-
28C7H Philips
Invar 2.0R
129 110 130 200 187 114
91 118 136 180 123 129 133 129 213 180 202 128
-
-
-
INITIAL DATA
SIM-806HEW SIM-806HMA/806HEA/806HC
29A8VH
SED
Invar Flat
128 153 133 210 109 108 112 125 118 183 123 129 126 136 200 195 202 128 128
-
-
28W8VH
SED
Invar Flat
104
109 107 175 161 124 110 108 111 188 127 127 138 140 127 148 178 128 128
-
-
29A7HP
SED
V-Before
148 149 134 206 183 110
94 130 133 195 127 128 131 130 200 187
­128 128
-
5
29A7HP
SED
V-After
106 141 134 206 195 105
79 130 143 195 127 128 131 130 200 179
­128 128
-
5
28W6
Thomson
AK 2.0R
84 117 130 200 172 108
82 118 136 177 121 132 135 126 128 146 171 128 128
34A7HP Toshiba
V-Before
133 151 134 189 179
95
81 145 150 186 127 128 127 134 200 198
­131 128
-
5
-
-
32W6V
Remarks
Thomson
Invar 2.0R
80 116 115 150 232 107
92
73
92 185 123 129 159 158 128 150 190 128
-
-
-
34A7HP
GEOM GEOM
FIX
FIX GEOM GEOM GEOM
FIX
FIX GEOM GEOM GEOM GEOM GEOM
FIX
FIX
FIX
FIX
-
-
-
Remarks
Toshiba
V-After
124 125 125 210 215
92
71 134 159 189 127 128 133 126 200 189
­131 128
-
5
GEOM GEOM
FIX
FIX GEOM GEOM GEOM
FIX
FIX GEOM GEOM GEOM GEOM GEOM
FIX
FIX
FIX
FIX
-
-
-
Loading...
+ 15 hidden pages