Service Manuals, User Guides, Schematic Diagrams or docs for : Samsung TV Samsung chassis K15D[1].part1
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Alignment and Adjustments
4. Alignment and Adjustments
4-1 Preadjustment
4-1-1 Factory Mode 4-1-3 When CRT Is Replaced
1. Do not attempt these adjustments in the Video 1. Make the following adjustments AFTER set-
Mode. ting up after setting up purity and conver-
gence :
2. The Factory Mode adjustments are necessary
when either the EEPROM (IC902) or the CRT White Balance
is replaced. Sub-Brightness
Vertical Center
3. Do not tamper with the "Adjustment" screen Vertical Size
of the Factory Mode menu. This screen is Horizontal Size
intended only for factory use. Fail Safe (This adjustment must be the last
step).
4-1-2 When EEPROM (IC902) Is Replaced
2. If the EEPROM or CRT is replaced and set SC
1. When IC902 is replaced all adjustment data as 20(factory mode).
revert to initial values. It is necessary to
re-program this data.
2. After IC902 is replaced, warm up the TV for
10 seconds.
4-2 Factory/Service Mode
4-2-1 Procedure for the "Adjustment" Mode
1. This mode uses the standard remote control. 4. Selection sequences for the all system:
The Service Mode is activated by entering the
following remote-control sequence : DOWN or UP key:
(1) DISPLAY FACTORY. SCT>SBT>BLR>BLB>RG>GG>BG>VSL>VS>
VA>HS>SC>CDL>STT>AKB>FS>NDL>
(2) STAND-BY MUTE 1 8 2 LBS>NSR>SCBT>VOL>CAP>HBS>RP00>
POWER ON. RP01>FMWS>AGC1>OMD>SCL>PWL>
MUS>AGC>DSK>DVDB
2. The "SERVICE (FACTORY)" message will be
displayed. The Service Mode has four compo- 5. The VOLUME keys increase or decrease the
nents: ADJUST, OPTION , G2-ADJUST and adjustment values (stored in the
RESET. non-volatile memory) when Adjustment Mode
is cancelled.
3. Access the Adjustment Mode by pressing the
"VOLUME" keys ( Up or Down). The adjust- 6. Cancel the Adjustment Mode by re-pressing
ment parameters are listed in the accompany- the "FACTORY" or "Power OFF" keys.
ing table, and selected by pressing the CHAN-
NEL keys ( , ).
Samsung Electronics 4-1
Alignment and Adjustments
4-2-2 Main Adjustment Parameter
SETTING
NO OSD FUNCTION RANGE INITAL DATA REMARK
19V 13V
1 SCT Su b Co n t ra s t 0 ~ 23 15 13 13 W/B (HIGH Y)
2 SBT Su b Bri g h t n e s s 0 ~ 23 8 9 9 W/B A (LOW Y)
3 BLR Bl a c k Le v e l o f fse t Red 0 ~ 63 35 31 31 W/B (LOW X, Y)
4 BLB Bl a c k Le v e l o f fse t Blu e 0 ~ 63 32 27 27 W/B (LOW X, Y)
5 RG R ed Gain 0 ~ 63 40 32 32 W/B (HIGH X, Y)
6 GG G re e n G a i n 0 ~ 63 30 25 25 FIX
7 BG Bl u e G a i n 0 ~ 63 42 31 31 W/B (HIGH X, Y)
8 VSL Ve r t i ca l S lo p e 0 ~ 63 30 31 31 Vertical SLOPE
9 VS Ve r t i ca l Sh i f t 0 ~ 63 31 31 31 FIX
10 VA Ve r t i ca l A m p l i tu d e 0 ~ 63 20 40 20 Vertical SIZE
11 HS H o r i z o n t a l Sh i f t 0 ~ 63 32 30 30 Horizontal SHIFT
12 SC S- Co r r e c t i o n 0 ~ 63 35 20 12 FIX
13 CD L Ca t h o d e Dri ve Le ve l 0 ~ 15 11 11 7 FIX
14 ST T Su b T i n t 0 ~ 7 3 7 7 FIX
15 AKB AK B O n / o ff 0 ~ 1 0 0 0 FIX
16 FS Filter Seting 0 ~ 15 32 37 37 FIX(STEREO)
17 ND L NT SC De l a y 0 ~ 15 1 1 1 FIX
18 LBS Low Band Separation Set 0 ~ 63 32 32 32 FIX(STEREO)
19 NSR N T SC Su b c o l o r 0 ~ 23 3 3 3 FIX
20 SCBT S c re e n B ri gh rtn e s s 0 ~ 63 35 45 45 FIX
21 VO L Vo l u m e p re s e t t i n g 0 ~ 63 10 10 10 FIX
22 CAP C a p ti on P o s i ti o n 0 ~ 15 12 12 12 FIX
23 HBS Hig h B a n d S e p a ra ti on S e t 0 ~ 63 32 32 32 FIX(STEREO)
24 RP00 R a ti o Pre / o v e rs h o o t 0 ~ 1 1 1 1 FIX
25 RP01 R a ti o Pre / o v e rs h o o t 0 ~ 1 1 1 1 FIX
26 FMWS W i nd o w S el ec ti on S o u n d PL L 0 ~ 1 0 0 0 FIX (Mono)
27 AGC1 IF A G C S p e e d 0 ~ 3 1 1 1 FIX (Nomal)
28 OMD Offs et I F D em od u l ato r 0 ~ 63 32 32 32 FIX (No Crrection)
29 SCL S o ft C l i p p i ng L ev e l 0 ~ 3 3 1 1 FIX (Off)
30 PWL P e a k W hi te L i m i tti ng 0 ~ 15 15 13 13 FIX (100%)
31 MUS M a tri x U S A 0 ~ 1 0 0 0 FIX (Mono)
32 AGC Auto m ati c G a i n C o n tro l 0 ~ 63 33 33 33 FIX
33 DSK Dy na m i c S k i n To n e 0 ~ 1 0 0 0 FIX
34 DVDB DV D B ri gh t O ffs et 0 ~ 10 5 4 4 FIX
4-2 Samsung Electronics
Alignment and Adjustments
4-2-3 Option Bytes
In the Service Mode, various can be selected via the Option Table. Example:
Option Table : xx xx
OSD SETTING REMARK
VIDEO MUTE ON - 800msec Mute Time(Tri-norma)
1 (When swiching channel)
OFF - Unavailable
STEREO - Zenith stereo (WITH IN UPC1851B)
2 AUDIO LINE STEREO - Line stereo (WITH IN UPC1851B)
MONO - Mono (WITH OUT UPC1851B)
ON - Stereo/L STEREO Model
3 TURBO
OFF - Mono Model
ZOOM - Nornal / Zoom
4 ZOOM
NOMAL - Nomal
ON - The power is switched on automatically
when detaching the Master S/W Auto On
5 AUTO POWER ON
OFF - Tact S/W Model
OFF - Unavailable
SOUND MUTE
6 (NO SIGNAL) ON - Available
ENGLISH
LANGUAGE ESPANOL - Start Language Select
7
FRENCH/PORTU
OFF - Unavailable
8 HOTEL MODE
ON - Available
AIR/STD/HRC/IRC
9 CATV
AIR/STD/HRC/AFN - U.S Army
ON - Available (U.S.A, Army)
10 X-RAY
OFF - Unavailable (South America)
ON - Available (U.S.A)
11 V-CHIP
OFF - Unavailable (Canada)
TV AV
12 AV Option
TV AV DVD
ON - Available (South America)
13 DEMO
OFF - Unavailable (U.S.A)
Samsung Electronics 4-3
Alignment and Adjustments
4-3 Other Adjustments
4-3-1 General 4-3-2 Automatic Degaussing
1. Usually, a color TV needs only slight touch- A degaussing coil is mounted around the pic-
up adjustment upon installation. Check the ture tube, so that external degaussing after
basic characteristics such as height, horizontal moving the TV should be unnecessary. But
and vertical sync and focus. the receiver must be properly degaussed upon
installation.
2. The picture should have good black and white
details. There should be no objectionable The degaussing coil operates for about 1 sec-
color shading; if color shading is present, per- ond after the power is switched ON. If the set
form the purity and convergence adjustments has been moved or turned in a different direc-
described below. tion, disconnect its AC power for at least 30
minutes.
3. Use the specified test equipment or its equiva-
lent. If the chassis or parts of the cabinet become
magnetized, poor color purity will result. If
4. Correct impedance matching is essential. this happens, use an external degaussing coil.
Slowly move the degaussing coil around the
5. Avoid overload. Excessive signal from a sweep faceplate of the picture tube and the sides and
generator might overload the front-end of the front of the receiver. Slowly withdraw the coil
TV. When inserting signal markers, do not to a distance of about 6 feet before removing
allow the marker generator to distort test power.
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 isola-
tion transformer.
4-4 Samsung Electronics
Alignment and Adjustments
4-3-3 High Voltage Check 4-3-6 Purity Adjustment
CAUTION: There is no high voltage adjustment on this chassis. 1. Warm up the receiver for at least 20 minutes.
The B+ power supply must be set to +122.5 volts (Full color bar
input and normal picture level). 2. Plug in the CRT deflection yoke and tighten
the clamp screw.
1. Connect a digital voltmeter to the second
anode of the picture tube. 3. Plug the convergence yoke into the CRT and
set in as shown in Fig. 4-2.
2. Turn on the TV. Set the Brightness and
Contrast controls to minimum (zero beam cur- 4. Input a black and white signal.
rent).
5. Fully demagnetize the receiver by applying an
3. The high voltage should not exceed 30KV. external degaussing coil.
4. Adjust the Brightness and contrast controls to 6. Turn the CONTRAST and BRIGHTNESS con-
both extremes. Ensure that the high voltage trols to maximum.
does not exceed 30KV under any conditions.
7. Loosen the clamp screw holding the yoke.
4-3-4 FOCUS Adjustment Slide the yoke backward or forward to pro-
vide vertical green belt. (Fig. 4-3).
1. Input a black and white signal.
8. Tighten the convergence yoke.
2. Adjust the tuning control for the clearest pic-
ture. 9. Slowly move the deflection yoke forward,
and adjust for the best overall green screen.
3. Adjust the FOCUS control for well defined
scanning lines in the center area of the screen. 10. Temporarily tighten the deflection yoke.
4-3-5 Cathode Voltage Adjustment 11. Produce blue and red rasters by adjusting the
low-light controls. Check for good purity in
(Screen Adjustment)
each field.
1. Connect CRT socket pin GK to an oscilloscope
12. Tighten the deflection yoke.
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).
125 _ 2.5V
+
GND
Fig. 4-1
Samsung Electronics 4-5
Alignment and Adjustments
4 Pole Magnet 2 POLE
PURITY
6 Pole Magnet 2 Pole Magnet
Clamper
Screw ADJU
(VERT
YOKE
CLAMP
SCREW
6 POLE
CONVERGENCE
4 POLE
CONVERGENCE
Fig. 4-2 Convergence Magnet Assembly
Vertical Green Belt
31m/m
Fig. 4-3 Center Convergence Adjustment
4-3-7 White Balance Adjustment
(a) Set up
1. Warm up the TV for at least 30 minutes in the
Aging Mode (OSD White). This mode is dis-
1 played by entering the following sequence:
DISPLAY FACTORY FACTORY
2. Input a Toshiba pattern.
2 (b) Low-Light Adjustment
1. Set SBT to 1.2 fL in the Factory Service
Mode with using CA100. See Fig. 4-4.
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 .
4-6 Samsung Electronics
Alignment and Adjustments
4-3-8 Center Convergence Adjustment
1. Warm up the receiver for at least 20 minutes. 5. Turn the both tabs at the same time, keeping
the angle constant, and superimpose the red
2. Adjust the two tabs of the 4 pole magnets to and blue horizontal line in the center of the
change the angle between them. Superimpose screen.
the red and blue vertical lines in the center
area of the screen. 6. Adjust the two-tab pairs of the 6-pole magnets
to superimpose the red and blue line onto the
3. Adjust the Brightness and Contrast controls green. (Changing the angle affects the vertical
for a well defined picture. lines, and rotating both magnets affects the
horizontal lines.)
4. Adjust the two-tab pairs of the 4 pole mag-
nets, and change the angle between them. 7. Repeat adjustments 2~6, if necessary.
Superimpose the red and the blue vertical
lines in the center area of the screen. 8. Since the 4-pole magnets and 6-pole magnets
interact, the dot movement is complex
(Fig. 4-5).
BLUE RED RED/BLUE GREEN
BLUE RED/BLUE
RED GREEN
4-Pole Magnet Movement 6-Pole Magnet Movement
Fig. 4-5 Center Convergence Adjustment
Samsung Electronics 4-7
Alignment and Adjustments
4-3-9 RF AGC Adjustment
Set the AGC data to 33 (Factory Mode).
4-3-10 Sub-Color Adjustment
Set NSR data to 3 (Factory Mode).
5 5
4-3-11 Geometry Adjustment
Fig. 4-9
SC VSVAVSLHS
6. Adjust HS (Horizontal Shift) so that the left
1. Input a lion head pattern. and right margins of the picture are 5.
2. Set the SC (S-Correction) as 20(13V : 12) and
VS(Vertical Shift) 31 so that the lion head circle
becomes oval.
3. Adjust with VA (Vertical Amplitude) so that
the top margin of the picture is 4.
4
Fig. 4-7
4. Adjust with VSL (Vertical-Slope) so that the
bottom margin of the picture is 4.
4
Fig. 4-8
5. Adjust with HS (Horizontal Shift) so that the
lion-head pattern and CRT centers are aligned.
4-8 Samsung Electronics
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