Service Manuals, User Guides, Schematic Diagrams or docs for : Samsung TV UW28J10VD UW28J10VD_C18A.part2
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Alignment and Adjustments (Electrical)
1. Alignment and Adjustments (Electrical)
1-1 Preadjustment
1-1-1 Factory Mode 1-1-3 When CRT Is Replaced
1. Do not attempt these adjustments in the Video Make the following adjustments after setting up
Mode. purity and convergence:
2. The Factory Mode adjustments are necessary White Balance
when either the EEPROM (IC901) or the CRT Sub-Brightness
is replaced. Vertical Center
Vertical Size
3. Do not tamper with the "Adjustment" screen Horizontal Size
of the Factory Mode menu. This screen is
intended only for factory use.
1-1-2 When EEPROM (IC901) Is Replaced
1. When IC901 is replaced all adjustment data
revert to initial values. It is necessary to re-
program this data.
2. After IC901 is replaced, warm up the TV for
10 seconds.
1-2 Factory ("Service") Mode
1 -2-1 Procedure for the "Adjustment" Mode
1. This mode uses the standard remote control. 4. Selection sequences for the PAL systems:
The Service Mode is activated by: (1) pressing
the "FACTORY" service key on the local-key- down or up key:
board, or (2) by entering the following remote-
control sequence (within 2 seconds): TXP>SCT>SBT>SSP>SCR>STT>BLR>BLG>
RG>GG>BG>CDL>VSL>PVS>VA>PHS>
Display > Menu/Mute SC>EWI>EWP>EUCN>ELCN>VSC>HPAR>
POWER ON HBOW>TC>EW2>PWL>WS>SVM>VMA>
AKB>CLD>PRO>MVLO>STR>SCBT>VZ>
2. The "SERVICE (FACTORY)" message will be BKS>BLS>TFR>CB>BPS>STBY>ESN>SEC>
displayed. The Service Mode has three compo- MSEC>EVB>VSSP>PDL>SDL>DSCR
nents: Adjustment, Option Bytes and Reset.
5. The "SELECT" keys (v,w) increase or decrease
3. Access the Adjustment Mode by pressing the the adjustment values, (stored in the
"SELECT" keys ( ). The adjustment para- non-volatile memory) when Adjustment Mode
meters are listed in the accompanying table, is cancelled.
and selected by pressing the "SELECT" keys
(v,w).
Samsung Electronics 1-1
1-2
OSD 28" 21" 17" Function OSD 28" 21" 17" Function
TXP 9 9 9 Text position PWL 15 15 12 Peak White Level
1-2-2 Adjust
SCT 16 10 10 Sub contrast WS 3 3 3 Whiter Stretch
SBT 10 10 10 Sub bright SVM 0 0 0 Delay of RGB Output to VM
SSP 5 5 5 Sub sharpness VMA 2 0 0 Amplitude of Scan Velocity
SCR 3 13 13 SUB COLOR AKB 0 0 0 Black Current Stabilization
STT 13 13 7 SUB TINT CLD 0 0 0 YUV Clamp Pulse Delay
Alignment and Adjustments (Electrical)
BLR 32 32 32 Low-Lingt(Black level Offset R) RPO 2 2 2 Rato Pre- and Over Shoot
BLG 32 32 32 Low-Lingt(Black level Offset G) MVOL 5 5 5 Melody Volume
RG 32 32 32 Hi-Lingt(White Point R) STR 1 1 1 Color Trap Single/Double
GG 32 32 32 Hi-Lingt(White Point G) SCBT 45 45 45 Screen Bright
BG 32 32 32 Hi-Lingt(White Point B) VZ 32 32 32 Vertical Zoom
CDL 10(13) 5 5 Cathode Drive Level BKS 1 1 1 Block Stretcher`
VSL 32 32 32 Vertical Slope BLS 1 1 1 Blue Stretcher
PVS 32 30 30 PAL Vertical Shift TFR 0 0 0 DC Transfer Ratio of Lumi Single
VA 15 40 40 Vertical Amplitude CB 0 0 0 Chroma Bandpass
PHS 32 32 32 PAL Horizontal Shift BPS 1 1 1 Bypass Delay Lune
SC 12 12 12 S- Correction STBY 1 1 1 DVD Siby power On/Off(reset)
EW1 18 18 18 EW Widh ESN 1 1 1 End Sensor-less(VCR)
EWP 32 32 32 EW Panorama SEC 1 1 0 SECAM On/Off(VCR)
EUCN 20 20 20 Uppeer Corner MSEC 1 1 1 Mesecam On/Off(VCR)
ELCN 20 20 20 Lower Corner EVB 0 0 0 Extended Vertical Blanking
VSC 32 32 32 Vertical scroll VSSP 8 8 3 VCR Playback Sharpness
HPAR 28 28 28 H-Paralleogram PDL 8 8 8 PAL Y-Delay
HBOW 32 32 32 Horizontal Bow SDL 12 12 12 SECAM Y-Delay
TC 20 20 20 EW Trapezium DSCR 15 15 15 DVD Sub Color
EW2 18 18 18 Panorama EW(6.5/6.5)
Samsung Electronics
Alignment and Adjustments (Electrical)
1-2-3 AGING Mode(Reference Only)
This pattern is used for pre-heating the CRT during manufacturing-it is accessed in the factory by twice
pressing the "FACTORY" key.
Even if the TV power is cut off, the Aging Mode is not cancelled.
The "AGING" marking is displayed on the screen.
The AGING mode is cancelled by epresing the "FACTORY" key.
1-2-4 Option
NO OSD Adjust(28WF) Adjust(21F) Adjust(17F) Range
1 Language Europe Europe Europe Europe/CIS
2 Help Message On On On On/Off
3 System CW CW CW CW/CS
4 SCART/RCA 2SCART 2SCART 1SCART 2SCART/1SCART/RCA
5 Audio Stereo Stereo Stereo Stereo/Mono
6 2H Comb On Off Off On/Off
7 Auto Power On On On On/Off
8 TTX On On On On/Off
9 LNA Off Off Hidden Off/Hidden/Normal
10 LIST/FLOF FLOF FLOF FLOF LIST/FLOF
11 E/W On Off Off On/Off
12 Tilt On Off Off On/Off
13 ATS On On On On/Off
14 Wide On Off X 16:9 WIDE/NORMAL/X 16:9
15 Vol Table Europe Europe Europe Europe/Arab
16 DVD Reg 2 2 2 1/2/3/4/5/6
17 DVD Color PAL PAL PAL PAL/NTSC/Auto
18 G-Code S-View S-View V-Plus S-VIEW/V-Plus/None
19 VPS-PDC PDC PDC PDC VPS/PDC/None
20 VCR HEAD HiFi HiFi 4HD Hifi/4HD/2HD
1-2-5 Screen Adjustment
1. Turn to the White Signal.
2. Adjust the VR screen for a normal picture is (no blooming or flyback line).
Input the Factory -> G2-Adjust choice -> Screen VR tuning OK Mode
Samsung Electronics 1-3
Alignment and Adjustments (Electrical)
1-2-6 Reset
The Reset Mode is used during factorying inspection
Function Reset : After Factorying Reset, the following items itens revert to their initial values.
1. Volume 10
2. Channel ANT 3
3. P- STD MEMORY
4. Auto Power ON
5. NR OFF
Cautim : When the EEPROM is replaced ; all items revert to their initial values.
1-2-7 VCR Test Mode (Reference Only)
The VCR Test Mode is used during factorying inspection or when exchange VCR deck.
* Entering : STBY Mode -> factory key -> Power key (light up all LED)
Function : "9" -> Head Switch Auto Adjustment.
"5" -> Env Center point Auto Adjustment.
"TRK + " -> Env max point Adjustment.
"TRK - " -> Env min point Adjustment.
* Cancellation : pull out power cord.
1-3 Other Adjustments 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
1-3-1 General replacing any parts.
1. Usually, a color TV needs only slight 8. To protect against shock hazard, use an
touch-up adjustment upon installation. isolation transformer.
Check the basic characteristics such as height,
horizontal and vertical sync and focus. 1-3-2 Automatic Degaussing
2. The picture should have good black and white A degaussing coil is mounted around the
details. There should be no objectionable picture tube, so that external degaussing after
color shading; if color shading is present, moving the TV should be unnecessary. But
perform the purity and convergence adjust- the receiver must be properly degaussed upon
ments described below. installation.
3. Use the specified test equipment or its The degaussing coil operates for about 1
equivalent. second after the power is switched ON. If the
set has been moved or turned in a different
4. Correct impedance matching is essential. direction, disconnect its AC power for at least
10 minutes.
5. Avoid overload. Excessive signal from a sweep
generator might overload the front-end of the If the chassis or parts of the cabinet become
TV. When inserting signal markers, do not magnetized, poor color purity will result. If
allow the marker generator to distort test this happens, use an external degaussing coil.
results. Slowly move the degaussing coil around the
faceplate of the picture tube and the sides and
6. Connect the TV only to an AC power source front of the receiver. Slowly withdraw the coil
with voltage and frequency as specified on the to a distance of about 6 feet before removing
backcover nameplate. power.
1-4 Samsung Electronics
Alignment and Adjustments (Electrical)
1-3-3 High Voltage Check
2. Turn on the TV. Set the Brightness and
CAUTION: There is no high voltage Contrast controls to minimum (zero beam
adjustment on this chassis. The B+ power current).
supply must be set to +130 volts (Full color
bar input and normal picture level). 3. The high voltage should not exceed 30KV.
4. Adjust the Brightness and contrast controls to
1. Connect a digital voltmeter to the second both extremes. Ensure that the high voltage
anode of the picture tube. does not exceed 30KV under any conditions.
1-3-4 FOCUS Adjustment
1. Input a CROSS hatch signal.
2. Adjust the tuning Focus VR for the clearest picture.
3. Adjust the FOCUS control for well defined scanning lines in the center area of the screen.
1-3-5 Screen Adjustment
1. Turn to the White Signal.
2. Adjust the VR screen for a normal picture is (no blooming or flyback line).
Input the Factory -> G2-Adjust choice -> Screen VR tuning OK Mode
1-3-6 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. 5-1.
4. Input a black and white signal.
5. Fully demagnetize the receive 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. 5-2).
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.
Samsung Electronics 1-5
Alignment and Adjustments (Electrical)
2
1-3-7 I C BUS GEOMETRIC Adjust
1. V SIZE(VA) 2. UPPEER CORNER(EUCN) : 28" Only
3. V LINEARITY (VSL) 4. LOWER CORNER(ELCN) : 28" Only
6. H POSITION (PHS)
5. S CORRECTION (SC)
7. Horizontal Bow(HBOW) 8. H SIZE(EWI) 28" Only
10. PIN COMP (EWP)
9. H-Paralleogram(HPAR)
11. V POSITION (PVS)
1-6 Samsung Electronics
Alignment and Adjustments (Electrical)
4 Pole Magnet 2 POLE
PURITY
6 Pole Magnet 2 Pole Magnet
Clamper
Screw
YOKE
CLAMP
SCREW
6 POLE
CONVERGENCE
4 POLE
CONVERGENCE
Fig. 5 -1 Convergence Magnet Assembly
Vertical Green Belt
31m/m
Fig. 5-2 Center Convergence Adjustment
1-3-8 White Balance Adjustment
1-4-7 (A) HIGH-LIGHT ADJUSTMENT
1. Input either a Lion Head or a "pure white" pattern.
2. Warm up the TV for 30 minutes.
3. Check the data in the Service Mode
4. Adjust RG, BG in the Factory Mode.
1-4-7 (B) LOW-LIGHT ADJUSTMENT
1. Automatically accomplished during the high-light adjustment.
Samsung Electronics 1-7
Alignment and Adjustments (Electrical)
1-3-9 Center Convergence Adjustment 5. Turn the both tabs at the same time, keeping
the angle constant, and superimpose the red
1. Warm up the receiver for at least 20 minutes. and blue horizontal line in the center of the
screen.
2. Adjust the two tabs of the 4 pole magnets to
change the angle between them. Superimpose 6. Adjust the two-tab pairs of the 6-pole magnets
the red and blue vertical lines in the center to superimpose the red and blue line onto the
area of the screen. green. (Changing the angle affects the vertical
lines, and rotating both magnets affects the
3. Adjust the Brightness and Contrast controls for horizontal lines.)
a well defined picture.
7. Repeat adjustments 2~6, if necessary.
4. Adjust the two-tab pairs of the 4 pole magnets,
and change the angle between them. 8. Since the 4-pole magnets and 6-pole magnets
Superimpose the red and the blue vertical interact, the dot movement is complex
lines in the center area of the screen. (Fig. 5-3).
BLUE RED RED/BLUE GREEN
BLUE RED/BLUE
RED GREEN
4-Pole Magnet Movement 6-Pole Magnet Movement
Fig 5-3 Center Convergence Adjustment
1-8 Samsung Electronics
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