SAMSUNG CL15K5MNFX-XAP Service Manual

COLOR TELEVISION RECEIVER
Chassis : K15D Model : CL15K5MNFX/XAP
COLOR TELEVISION RECEIVER CONTENTS
Precautions
Specifications and IC Data
Disassembly and Reassembly
Troubleshooting
Exploded View and Parts List
Electrical Parts List
Block Diagram
Wiring Diagram
Schematic Diagrams
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
Alignment and Adjustments
Samsung Electronics 4-1
4. Alignment and Adjustments
4-1 Preadjustment
4-1-1 Factory Mode
1. Do not attempt these adjustments in the Video Mode.
2. The Factory Mode adjustments are necessary when either the EEPROM (IC902) or the CRT is replaced.
3. Do not tamper with the “Adjustment” screen of the Factory Mode menu. This screen is intended only for factory use.
4-1-2 When EEPROM (IC902) Is Replaced
1. When IC902 is replaced all adjustment data revert to initial values. It is necessary to re-program this data.
2. After IC902 is replaced, warm up the TV for 10 seconds.
4-1-3 When CRT Is Replaced
1. Make the following adjustments AFTER set­ting up after setting up purity and conver­gence :
White Balance Sub-Brightness Vertical Center Vertical Size Horizontal Size Fail Safe (This adjustment must be the last step).
2. If the EEPROM or CRT is replaced and set SC as 20(factory mode).
4-2 Factory/Service Mode
4-2-1 Procedure for the “Adjustment” Mode
1. This mode uses the standard remote control. The Service Mode is activated by entering the following remote-control sequence :
(1) DISPLAY → FACTORY.
(2) STAND-BY → MUTE → 1 → 8 → 2
POWER ON.
2. The “SERVICE (FACTORY)” message will be displayed. The Service Mode has four compo­nents: ADJUST, OPTION , G2-ADJUST and RESET.
3. Access the Adjustment Mode by pressing the “VOLUME” keys ( Up or Down). The adjust­ment parameters are listed in the accompany­ing table, and selected by pressing the CHAN­NEL keys ( , ).
4. Selection sequences for the all system:
DOWN or UP key:
SCT>SBT>BLR>BLB>RG>GG>BG>VSL>VS> VA>HS>SC>CDL>STT>AKB>FS>NDL> LBS>NSR>SCBT>VOL>CAP>HBS>RP00> RP01>FMWS>AGC1>OMD>SCL>PWL> MUS>AGC>DSK>DVDB
5. The VOLUME keys increase or decrease the adjustment values (stored in the non-volatile memory) when Adjustment Mode is cancelled.
6. Cancel the Adjustment Mode by re-pressing the “FACTORY” or “Power OFF” keys.
4-2-2 Main Adjustment Parameter
Alignment and Adjustments
4-2 Samsung Electronics
OSDNO FUNCTION RANGE INITAL DATA
1
SCT Sub Cont ras t 0 ~ 23
2
SBT Sub Bright nes s
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
SCBT Screen Brighrtness 0 ~ 63
20
21
22
23
RP00
24
RP01
25
FMWS
26
AGC1
27
OMD
28
29
30
31
32
33
34
Black Level offset Red
BLR
Black Level offset Blue
BLB
RG Red Gai n 0 ~ 63
GG Green Gain 0 ~ 63
BG Blue Gai n 0 ~ 63
VSL Vert ical Slope 0 ~ 63
VS Ver t ical Shi f t 0 ~ 63
VA Vert ical Am pli tude 0 ~ 63
HS Horizont al Shif t 0 ~ 63
SC S- Cor r ec t i on 0 ~ 63
CDL Cathode Drive Level 0 ~ 15
STT Sub Tint 0 ~ 7
AKBFSAKB On / off 0 ~ 1
Filter Seting
NDL NTSC Delay 0 ~ 15
Low Band Separation Set
LBS
NSR NTSC Sub color 0 ~ 23
VOL Volume pre set t i ng 0 ~ 63
CAP Caption Position
HBS
High Band Separation Set
Ratio Pre / overshoot
Ratio Pre / overshoot
Window Selection Sound PLL
IF AGC Speed
Offset IF Demodulator
SCL
Soft Clipping Level
PWL
Peak White Limitting
MUS
Matrix USA
AGC
Automatic Gain Control
DSK
Dynamic Skin Tone
DVDB
DVD Bright Offset
0~23
0~63
0~63
0~15
0~63
0~15
0~63
0~1
0~1
0~1
0~3
0~63
0~3
0~15
0~1
0~63
0~1
00~1
SETTING
19V 13V
15
8
35
32
40
30
42
30
31
20
32
35
11
3
0
32
1
32
3
35
10
12
32
1
1
0
1
32
3
15
0
33
0
5
13
9
31
27
32
25
31
31
31
40
30
20
11
7
0
37
1
32
3
45
10
12
32
1
1
0
1
32
1
13
0
33
0
4
13
9
31
27
32
25
31
31
31
20
30
12
7
7
0
37
1
32
3
45
10
12
32
1
1
0
1
32
1
13
0
33
0
4
REMARK
W/B (HIGH Y)
W/B A (LOW Y)
W/B (LOW X, Y)
W/B (LOW X, Y)
W/B (HIGH X, Y)
FIX
W/B (HIGH X, Y)
Vertical SLOPE
FIX
Vertical SIZE
Horizontal SHIFT
FIX
FIX
FIX
FIX
FIX(STEREO)
FIX
FIX(STEREO)
FIX
FIX
FIX
FIX
FIX(STEREO)
FIX
FIX
FIX (Mono)
FIX (Nomal)
FIX (No Crrection)
FIX (Off)
FIX (100%)
FIX (Mono)
FIX
FIX
FIX
Alignment and Adjustments
Samsung Electronics 4-3
4-2-3 Option Bytes
In the Service Mode, various can be selected via the Option Table. Example:
Option Table : xx xx
OSD
1
2
3
4
5
6
VIDEO MUTE
(When swiching channel)
AUDIO
TURBO
ZOOM
AUTO POWER ON
SOUND MUTE
(NO SIGNAL)
SETTING
ON
OFF
STEREO
LINE STEREO
MONO
ON
OFF
ZOOM
NOMAL
ON
OFF
OFF
ON
REMARK
- 800msec Mute Time(Tri-norma)
- Unavailable
- Zenith stereo (WITH IN UPC1851B)
- Line stereo (WITH IN UPC1851B)
- Mono (WITH OUT UPC1851B)
- Stereo/L STEREO Model
- Mono Model
- Nornal / Zoom
- Nomal
- The power is switched on automatically when detaching the Master S/W Auto On
- Tact S/W Model
- Unavailable
- Available
ENGLISH
7
8
9
10
11
12
13
LANGUAGE
HOTEL MODE
CATV
X-RAY
V-CHIP
AV Option
DEMO
ESPANOL
FRENCH/PORTU
OFF
ON
AIR/STD/HRC/IRC
AIR/STD/HRC/AFN
ON
OFF
ON
OFF
TV AV
TV AV DVD
ON
OFF
- Start Language Select
- Unavailable
- Available
- U.S Army
- Available (U.S.A, Army)
- Unavailable (South America)
- Available (U.S.A)
- Unavailable (Canada)
- Available (South America)
- Unavailable (U.S.A)
Alignment and Adjustments
4-4 Samsung Electronics
4-3 Other Adjustments
4-3-1 General
1. Usually, a color TV needs only slight touch­up adjustment upon installation. Check the basic characteristics such as height, horizontal and vertical sync and focus.
2. The picture should have good black and white details. There should be no objectionable color shading; if color shading is present, per­form the 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.
4-3-2 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 has been moved or turned in a different direc­tion, disconnect its AC power for at least 30 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 removing power.
Alignment and Adjustments
Samsung Electronics 4-5
4-3-3 High Voltage Check
CAUTION: There is no high voltage adjustment on this chassis. The B+ power supply must be set to +122.5 volts (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. The high voltage should not exceed 30KV.
4. Adjust the Brightness and contrast controls to
both extremes. Ensure that the high voltage does not exceed 30KV under any conditions.
4-3-4 FOCUS Adjustment
1. Input a black and white signal.
2. Adjust the tuning control for the clearest pic-
ture.
3. Adjust the FOCUS control for well defined
scanning lines in the center area of the screen.
4-3-5 Cathode Voltage Adjustment
(Screen Adjustment)
1. Connect CRT socket pin GK to an oscilloscope
probe.
2. Input a gray scale pattern. (Use a pattern gen-
erator, PM5518)
3. Use the P mode key (on the remote control)
for the STANDARD picture.
4. Adjust the Screen VR (on the FBT) so that the
voltage on the oscilloscope becomes 125+2.5V (See Fig. 4-1).
4-3-6 Purity Adjustment
1. Warm up the receiver for at least 20 minutes.
2. Plug in the CRT deflection yoke and tighten the clamp screw.
3. Plug the convergence yoke into the CRT and set in as shown in Fig. 4-2.
4. Input a black and white signal.
5. Fully demagnetize the receiver by applying an external degaussing coil.
6. Turn the CONTRAST and BRIGHTNESS con­trols to maximum.
7. Loosen the clamp screw holding the yoke. Slide the yoke backward or forward to pro­vide vertical green belt. (Fig. 4-3).
8. Tighten the convergence yoke.
9. Slowly move the deflection yoke forward, and adjust for the best overall green screen.
10. Temporarily tighten the deflection yoke.
11. Produce blue and red rasters by adjusting the low-light controls. Check for good purity in each field.
12. Tighten the deflection yoke.
Fig. 4-1
_
_
+
125 2.5V
GND
Alignment and Adjustments
4-6 Samsung Electronics
4-3-7 White Balance Adjustment
Fig. 4-2 Convergence Magnet Assembly
Fig. 4-3 Center Convergence Adjustment
Fig. 4-4
(a) Set up
1. Warm up the TV for at least 30 minutes in the Aging Mode (OSD White). This mode is dis­played by entering the following sequence:
DISPLAY
FACTORY → FACTORY
2. Input a Toshiba pattern.
(b) Low-Light Adjustment
1. Set SBT to 1.2 fL in the Factory Service Mode with using CA100. See Fig. 4-4.
2. Adjust RG,BG so that the levels are suitable to each local area.
(c) High-Light Adjustment
1. Set SCT to 50FL(13V : 60FL) in the Factory Service Mode with using CA100. See Fig. 4-4 .
Clamper
6 Pole Magnet
Screw
4 Pole Magnet
2 Pole Magnet
2 POLE PURITY
4 POLE CONVERGENCE
Vertical Green Belt
YOKE CLAMP SCREW
6 POLE CONVERGENCE
ADJU (VERT
31m/m
1
2
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