SAMSUNG CFT27908X-SMS, CFT27918X-SMS, CL29K3W8X-GSU, CL29M6P8X-STR, CL29M6P8X-XAX Service Manual

COLOR TELEVISION RECEIVER

Chassis	: KS3A(N)
Model	: CFT27908X/SMS	CFT27918X/SMS
	CL29K3W8X/GSU	CL29M6P8X/STR
	CL29M6P8X/XAX	CL34M9P8X/XAX
	CM36020S8S/KMT

COLOR TELEVISION RECEIVER

CONTENTS

1. Precautions

2. Reference Information

3. Specifications

4. Alignment and Adjustments

5. Troubleshooting

6. Exploded Views and Parts List

7. Electrical Parts List

8. Block Diagrams

9. Wiring Diagram

10. Schematic Diagrams

Precautions

1. Precautions

Follow these safety, servicing and ESD precautions to prevent damage and protect against potential hazards such as electrical shock and X-rays.

1-1 Safety Precautions

1.Be sure that all of the built-in protective devices are replaced. Restore any missing protective shields.

2.When reinstalling the chassis and its assemblies, be sure to restore all protective devices, including: nonmetallic control knobs and compartment covers.

3.Make sure that there are no cabinet openings through which people—particularly children—might insert fingers and contact dangerous voltages. Such openings include the spacing between the picture tube and the cabinet mask, excessively wide cabinet ventilation slots, and improperly fitted back covers.

If the measured resistance is less than 1.0 megohm or greater than 5.2 megohms, an abnormality exists that must be corrected before the unit is returned to the customer.

4.Leakage Current Hot Check (Figure 1-1): Warning: Do not use an isolation transformer during this test. Use a leakagecurrent tester or a metering system that complies with American National Standards Institute (ANIS C101.1, Leakage Current for Appliances), and Underwriters Laboratories (UL Publication UL1410, 59.7).

5.With the unit completely reassembled, plug the AC line cord directly into the power outlet. With the unit’s AC switch first in the ON position and then OFF, measure the current between a known earth ground (metal water pipe, conduit, etc.) and all exposed metal parts, including: antennas, handle brackets, metal cabinets, screwheads and control shafts. The current measured should not exceed 0.5 milliamp. Reverse the powerplug prongs in the AC outlet and repeat the test.

									(READING SHOULD
						LEAKAGE			NOT BE ABOVE
DEVICE						CURRENT				0.5mA)
UNDER						TESTER
TEST
		TEST ALL
	EXPOSED METAL
		SURFACES
2-WIRE CORD
ALSO TEST WITH
PLUG REVERSED
(USING AC ADAPTER											EARTH
PLUG AS REQUIRED)										GROUND

Fig. 1-1 AC Leakage Test

6.Antenna Cold Check:

With the unit’s AC plug disconnected from the AC source, connect an electrical jumper across the two AC prongs. Connect one lead of the ohmmeter to an AC prong. Connect the other lead to the coaxial connector.

7.X-ray Limits:

The picture tube is especially designed to prohibit X-ray emissions. To ensure continued X-ray protection, replace the picture tube only with one that is the same type as the original. Carefully reinstall the picture tube shields and mounting hardware; these also provide X-ray protection.

8.High Voltage Limits:

High voltage must be measured each time servicing is done on the B+, horizontal deflection or high voltage circuits. Correct operation of the X-ray protection

circuits must be reconfirmed whenever they are serviced.

(X-ray protection circuits also may be called “horizontal disable” or “hold-down”.)

Heed the high voltage limits. These include the X–ray Protection Specifications Label, and the Product Safety and X-ray Warning Note on the service data schematic.

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Precautions

1-1 Safety Precautions (Continued)

9.High voltage is maintained within specified limits by close-tolerance, safety-related components and adjustments. If the high voltage exceeds the specified limits, check each of the special components.

10.Design Alteration Warning:

Never alter or add to the mechanical or electrical design of this unit. Example: Do not add auxiliary audio or video connectors. Such alterations might create a safety hazard. Also, any design changes or additions will void the manufacturer’s warranty.

11.Hot Chassis Warning:

Some TV receiver chassis are electrically connected directly to one conductor of the AC power cord. If an isolation transformer is not used, these units may be safely serviced only if the AC power plug is inserted so that the chassis is connected to the ground side of the AC source.

To confirm that the AC power plug is inserted correctly, do the following: Using an AC voltmeter, measure the voltage between the chassis and a known earth ground. If the reading is greater than 1.0V, remove the AC power plug, reverse its polarity and reinsert. Re-measure the voltage between the chassis and ground.

12.Some TV chassis are designed to operate with 85 volts AC between chassis and ground, regardless of the AC plug polarity. These units can be safely serviced only if an isolation transformer inserted between the receiver and the power source.

13.Some TV chassis have a secondary ground system in addition to the main chassis ground. This secondary ground system is not

isolated from the AC power line. The two ground systems are electrically separated by insulating material that must not be defeated or altered.

14.Components, parts and wiring that appear to have overheated or that are otherwise damaged should be replaced with parts that meet the original specifications. Always determine the cause of damage or overheating, and correct any potential hazards.

15.Observe the original lead dress, especially near the following areas: Antenna wiring, sharp edges, and especially the AC and high voltage power supplies. Always inspect for pinched, out-of-place, or frayed wiring. Do not change the spacing between components and the printed circuit board. Check the AC power cord for damage. Make sure that leads and components do not touch thermally hot parts.

16.Picture Tube Implosion Warning:

The picture tube in this receiver employs “integral implosion” protection. To ensure continued implosion protection, make sure that the replacement picture tube is the same as the original.

17.Do not remove, install or handle the picture tube without first putting on shatterproof goggles equipped with side shields. Never handle the picture tube by its neck. Some “in-line” picture tubes are equipped with a permanently attached deflection yoke; do not try to remove such “permanently attached” yokes from the picture tube.

18.Product Safety Notice:

Some electrical and mechanical parts have special safety-related characteristics which might not be obvious from visual inspection. These safety features and the protection they give might be lost if the replacement component differs from the original—even if the replacement is rated for higher voltage, wattage, etc.

Components that are critical for safety are indicated in the circuit diagram by shading,

( ) or ( ).

Use replacement components that have the same ratings, especially for flame resistance and dielectric strength specifications.

A replacement part that does not have the same safety characteristics as the original might create shock, fire or other hazards.

1-2	Samsung Electronics

Precautions

1-2 Servicing Precautions

Warning1: First read the “Safety Precautions” section of this manual. If some unforeseen circumstance creates a conflict between the servicing and safety precautions, always follow the safety precautions.

Warning2: An electrolytic capacitor installed with the wrong polarity might explode.

1.Servicing precautions are printed on the cabinet. Follow them.

2.Always unplug the unit’s AC power cord from the AC power source before attempting to:

(a)Remove or reinstall any component or assembly, (b) Disconnect an electrical plug or connector, (c) Connect a test component in parallel with an electrolytic capacitor.

3.Some components are raised above the printed circuit board for safety. An insulation tube or tape is sometimes used. The internal wiring is sometimes clamped to prevent contact with thermally hot components. Reinstall all such elements to their original position.

4.After servicing, always check that the screws, components and wiring have been correctly reinstalled. Make sure that the portion around the serviced part has not been damaged.

5.Check the insulation between the blades of the AC plug and accessible conductive parts (examples: metal panels, input terminals and earphone jacks).

6.Insulation Checking Procedure: Disconnect the power cord from the AC source and turn the power switch ON. Connect an insulation resistance meter (500V) to the blades of the AC plug.

The insulation resistance between each blade of the AC plug and accessible conductive parts (see above) should be greater than 1 megohm.

7.Never defeat any of the B+ voltage interlocks. Do not apply AC power to the unit (or any of its assemblies) unless all solid-state heat sinks are correctly installed.

8.Always connect a test instrument’s ground lead to the instrument chassis ground before connecting the positive lead; always remove the instrument’s ground lead last.

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1-3

Precautions

1-3 Precautions for Electrostatically Sensitive Devices (ESDs)

1.Some semiconductor (“solid state”) devices are easily damaged by static electricity. Such components are called Electrostatically Sensitive Devices (ESDs); examples include integrated circuits and some field-effect transistors. The following techniques will reduce the occurrence of component damage caused by static electricity.

2.Immediately before handling any semicon ductor components or assemblies, drain the electrostatic charge from your body by touching a known earth ground. Alternatively, wear a discharging wrist-strap device. (Be sure to remove it prior to applying power— this is an electric shock precaution.)

3.After removing an ESD-equipped assembly, place it on a conductive surface such as aluminum foil to prevent accumulation of electrostatic charge.

4.Do not use freon-propelled chemicals. These can generate electrical charges that damage ESDs.

5.Use only a grounded-tip soldering iron when soldering or unsoldering ESDs.

6.Use only an anti-static solder removal device. Many solder removal devices are not rated as “anti-static”; these can accumulate sufficient electrical charge to damage ESDs.

7.Do not remove a replacement ESD from its protective package until you are ready to install it. Most replacement ESDs are packaged with leads that are electrically shorted together by conductive foam, aluminum foil or other conductive materials.

8.Immediately before removing the protective material from the leads of a replacement ESD, touch the protective material to the chassis or circuit assembly into which the device will be installed.

9.Minimize body motions when handling unpackaged replacement ESDs. Motions such as brushing clothes together, or lifting a foot from a carpeted floor can generate enough static electricity to damage an ESD.

1-4	Samsung Electronics

Reference Information

2. Reference Information

2-1 Tables of Abbreviations and Acronyms

Table 2-1 Abbreviations

A	Ampere	MV	Megavolt
Ah	Ampere-hour	MW	Megawatt
Å	Angstrom	MΩ	Megohm
dB	Decibel	m	Meter
dBm	Decibel Referenced to One	µA	Microampere
°C	Milliwatt	µF	Microfarad
	Degree Celsius	µH	Microhenry
°F	Degree Fahrenheit	µm	Micrometer
°K	degree Kelvin	µs	Microsecond
F	Farad	µW	Microwatt
G	Gauss	mA	Milliampere
GHz	Gigahertz	mg	Milligram
g	Gram	mH	Millihenry
H	Henry	mI	Milliliter
Hz	Hertz	mm	Millimeter
h	Hour	ms	Millisecond
ips	Inches Per Second	mV	Millivolt
kWh	Kilowatt-hour	nF	Nanofarad
kg	Kilogram	Ω	Ohm
kHz	Kilohertz	pF	Picofarad
kΩ	Kilohm	Ib	Pound
km	Kilometer	rpm	Revolutions Per Minute
km/h	Kilometer Per Hour	rps	Revolutions Per Second
kV	Kilovolt	s	Second (Time)
kVA	Kilovolt-ampere	V	Volt
kW	Kilowatt	VA	Volt-ampere
I	Liter	W	Watt
MHz	Megahertz	Wh	Watt-hour

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Reference Information

Table 2-2 Table of Acronyms

ABL	Automatic Brightness Limiter	I/O	Input/output
AC	Alternating Current	L	Left
ACC	Automatic Chroma Control	L	Low
AF	Audio Frequency	LED	Light Emitting Diode
AFC	Automatic Frequency Control	LF	Low Frequency
AFT	Automatic Fine Tuning	MOSFET	Metal-Oxide-Semiconductor-Field-Effect-Tr
AGC	Automatic Gain Control	MTS	Multi-channel Television Sound
AM	Amplitude Modulation	NAB	National Association of Broadcasters
ANSI	American National Standards Institute	NEC	National Electric Code
APC	Automatic Phase Control	NTSC	National Television Systems Committee
APC	Automatic Picture Control	OSD	On Screen Display
A/V	Audio-Video	PCB	Printed Circuit Board
AVC	Automatic Volume Control	PLL	Phase-Locked Loop
BAL	Balance	PWM	Pulse Width Modulation
BPF	Bandpass Filter	QIF	Quadrature Intermediate Frequency
B-Y	Blue-Y	R	Right
CATV	Community Antenna Television (Cable TV)	RC	Resistor & Capacitor
CB	Citizens Band	RF	Radio Frequency
CCD	Charge Coupled Device	R-Y	Red-Y
CCTV	Closed Circuit Television	SAP	Second Audio Program
Ch	Channel	SAW	Surface Acoustic Wave(Filter)
CRT	Cathode Ray Tube	SIF	Sound Intermediate Frequency
CW	Continuous Wave	SMPS	Switching Mode Power Supply
DC	Direct Current	S/N	Signal/Noise
DVM	Digital Volt Meter	SW	Switch
EIA	Electronics Industries Association	TP	Test Point
ESD	Electrostatic Discharge	TTL	Transistor Transistor Logic
ESD	Electrostatically Sensitive Device	TV	Television
FBP	Feedback Pulse	UHF	Ultra High Frequency
FBT	Flyback Transformer	UL	Underwriters Laboratories
FF	Flip-Flop	UV	Ultraviolet
FM	Frequency Modulation	VCD	Variable-Capacitance Diode
FS	Fail Safe	VCO	Voltage Controlled Oscillator
GND	Ground	VCXO	Voltage Controlled Crystal Oscillator
G-Y	Green-Y	VHF	Very High Frequency
H	High	VIF	Video Intermediate Frequency
HF	High-Frequency	VR	Variable Resistor
HI-FI	High Fidelity	VTR	Video Tape Recorder
IC	Inductance-Capacitance	VTVM	Vacuum Tube Voltmeter
IC	Integrated Circuit	TR	Transistor
IF	Intermediate Frequency

2-2	Samsung Electronics

Reference Information

2-2 IC Line Up

Table 2 - 3 IC Line - Up

	NO			BOARD		LOC. NO	SPEC	DESCRIPTION	REMARK
						IC201S	VDP3130Y	Video Processor	Refer to Table 2-3-1
						IC601	MSP3451G	Multistandard Sound Processor	Refer to Table 2-3-2
						IC901	SIM408AY	MICOM, TTX(MTP)
						IC902	KS24L161	EEPROM
						IC602	TDA7297	Audio AMP	Refer to Table 2-3-3
						HIC201			VM Option
						HIC202	DRGB001	RGB Drive AMP Hybrid IC
						HIC203
						HIC204
						HIC401	DDRI001	100Hz Horizontal Pulse AMP	Option
						IC301	LA7845	Vertical IC
						Q402	KSC2073-H2
								Horizontal Drive IC
						Q401	KSD5703		HC401
						D414	FMP-3FU
						IC401	KA393	E/W Drive IC
	1			MAIN
						Q404	IRF620
						IC801S	3S1265R	SPS Controllor
						D801S	RBV606	Bridge Diode
						PC801S	PC123Y	Photo Coupler
						IC802	KA78R05	5V Controlled Regulator
						D805
							FML-G12S	Rectifier Diode	HC801
						D806
						D807
						D802	FMG-G2CS
						IC201	KA78RM33	3.3V Regulator	VDPY
						IC804	KA7806	6V Regulator
						IC803	KA78R08	8V Controlled Regulator
						IC903	KA78RM33	3.3V Regulator
						IC904	KIA7025AP	MICOM Reset IC
						Q909	2N7000	IIC Level Shifter
						Q910
						TU01S	TCLN3181PA09A	Main Tuner with IF Block	Refer to Table 2-3-4
						TU02S	TCPN3081PD09A	Sub Tuner with IF Block	Refer to Table 2-3-5

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Reference Information

Table 2 - 3 IC Line - Up

	NO	BOARD	LOC. NO	SPEC	DESCRIPTION	REMARK
			IC501
				TDA6111Q	Video Output AMP R.G.B Drive
			IC502
			IC503
	2	CRT
			QF04	2SC2344	Push-Pull (VM)
			QF05	2SA1011		Option
			QG02	KSA940	TR-Power (TILT)
			QG03	KSD2073-H2
			ICG01	KA4558	OP-AMP (TILT)
	3	DOUBLE	ICH01	KA4558	OP-AMP	Option
		FOCUS	QH01	2SC4636RB	TR-Power
	4	V-S/W	ICS01	TEA6425	Video Switching IC with Adder Output	Option
	5	PIP	ICP01	SDA9388X	High-end Picture-In Picture IC	Option
			ICP02	EZ1086CM	3.3V Regulator

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		Reference Information
Table 2-3-1 VIDEO IC (IC201S)
SPEC	FUNCTION	REMARK
VDP3108B	50Hz Basic
VDP3112B	50Hz, 2H Comb Filtr
VDP3120B	50Hz, 2H Comb Filter, Horizontal Scaler
VDP3130Y	50Hz, 2H Comb Filter, DVD Input
VDP3140D	100Hz
Table 2-3-2 SOUND IC (IC601)
SPEC	FUNCTION	REMARK
MSP3400D	Multistandard, A2 Stereo
MSP3410D	Multistandard, A2 Stereo, Nicam
MSP3411G	Multistandard, A2 Stereo, Vitual Dolby
MSP3440G	Multistandard, A2 Stereo, Vitual Dolby
MSP3451G	Multistandard, A2 Stereo, Vitual Dolby
Table 2-3-3 SOUND AMP (IC602)
SPEC	FUNCTION	REMARK
TDA7297	15W x 2CH, 10W x 2CH
Table 2-3-4 1’st TUNER (TU01S)
SPEC	FUNCTION	REMARK
TCLN3181PA09A	NTSC, PAL N.M, LNA Function	Main, F-Jack
TCPN3081PC09A	PAL N.M, NTSC, LNA Function	Main, Thin Jack
TCPN3081PA09A	PAL N.M, NTSC, LNA Function	Main 1Tuner

Note TCPS3001PD09A(S) is out-of-date, TCPS3001PD09D(S) which is up-to-date has the same function.

Table 2-3-5 2’nd TUNER (TU02S)

SPEC	FUNCTION	REMARK
TCLN3181PD09A	NTSC, PAL N.M LNA Function	Sub
TCPN3081PD09A	NTSC	Sub

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MEMO

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Specifications

3. Specifications

Television		Multi		NTSC-M, PAL N.M
System
Antena Input				75ohms, Coaxial Cable
		Consumption		160W (Applied When 29” Flat)
Power		Requirements		Free Volts(100V-240Volts)
				Free Voltage	Not Present R815
		Frequency		50/60Hz
				15W x 2CH
		Output
				10W x 2CH
Sound				5W x 2CH
				Vitual Dolby	Option
		Effect
				Turbo Sound
				Pseudo Stereo
				RCA Input
		Front
				S-VHS	Option
		(AV2)
				Head-Phone
Jacks
				2 AV Input
		Back
				DVD Input(YPbPr)	Option
				AV2 Monitor Audio Output	Option
				S-VHS	Option
Specifications are subject to change.
Specifications for Model Name
				Function	NOTE
P		2 TUNER PIP

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3-1

MEMO

3-2	Samsung Electronics

Alignment and Adjustments

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 colorbar 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.

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4-1

Alignment and Adjustments

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.( )

STATIC FOCUS VR

H

DYNAMIC FOCUS VR

V

8. Repeat 4-7, if necessary.

SCREEN

<FBT FOCUS PACK>

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 below.

IBRM	= 200
WDRV = 35
CDL	= 200

COLR G B = 120 120 120

4-2	Samsung Electronics

Alignment and Adjustments

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)

Note 1. 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 below.

IBRM	= 200
WDRV = 35
CDL	= 200

COLR G B = 120 120 120

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.

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4-3

Alignment and Adjustments

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 50 ft ± 3.

-Use “Red Drive” and “ Blue Drive” to adjust High-Light (x : 275, y : 295)

-Adjust “Sub Bright” so that Y (luminance) becomes 1.5ft ± 0.3.

-Use “Red Cutoff” and “Blue Cutoff” to adjust Low-Light (x : 275, y : 295).

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.

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Alignment and Adjustments

4-8 Factory Adjustment

4-8-1 Service Mode

1.To enter the “Service Mode”, Press the remote-control keys in this sequence : - If you do not have Factory remote-control

Keys Number

PICTURE OFF MUTE PICTURE ON 1,8,2

- If you have Factory remote-control

PICTURE ON
			DISPLAY (	)				FACTORY

2. After the Service Mode is entered, the initial screen is as shown in the figure below.

Service

Deflection

Video Adjust 1

Video Adjust 2

Video Adjust 3

Option *

Reset

G2-Adjust

Others

VDP Verision : Y

*These hexa digits are check sum value which depends on the MICOM.

If check sum value is changed, the value of E2PROM Data newly initialed.

3.Use the Channel Up/Down buttons to move the cursor in the adjustment parameters.

Note 2.

-When CRT, CRT PCB, FBT, E2PROM (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.)

Note 3.

-When E2PROM (IC902) and Micom are replaced at the same time :

1.After the Factory Mode is entered, check the VDP version in the service list.

2.Set the version so that the VDP version is identical with the video chip (IC201S)

3.After all settings are completed, adjust the service value of each mode to its default.

4.Refer to “Service Manual” for factory value.

5.Check the version

a.Check the VDP version “Y” in the Factory Mode.

b.Version Mode : “Y”, “B” from IC201S(Video Chip) VDD3130”Y”

VDD3112”B”, VDD3108”B”

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4-5

Alignment and Adjustments

4-8-2 Memory Data

4-8-2(A) DEFLECTION (GEOMETRIC ADJUSTMENT VALUE)

	DEFLECTION	Initial	Adjustment	SAM2540	TXK3276	CL29A6	TXK3279	TXK3676	TXK3679
		Value	Value	SAM2740
	H Bow	0	Fixed	0	0	0	0	0	0
	H Angle	0	Adjustment	0	0	10	0	0	0
	H DSCC	1	Fixed	1	1	3	3	1	3
	V SHIFT	-40	Adjustment	-18	-27	-55	-51	-27	-51
	V AMP	5	Adjustment	18	-17	0	-35	-17	-35
	V SLOPE	-2	Adjustment	-4	-3	0	-2	-3	-2
	V SC	-7	Fixed	-13	-13	-17	0	-13	0
	H EW	64	Adjustment	24	71	45	49	71	49
	H TRAPEZIUM	-20	Adjustment	20	-50	-50	-30	-50	-30
	H PARABOLA	-13	Adjustment	17	10	-5	18	10	18
	H SYMMETRY	13	Fixed	13	13	13	13	13	13
	H CORNER	15	Adjustment	69	-13	25	-34	-13	-34
	H SHIFT	4		13	20	-20	-6	20	-6
	PIP CONTRAST	15	Fixed	-	-	15	10	-	10
	PIP TINT	0	Fixed	-	-	0	0	-	0
	PIP PAL V.POS	12	Fixed	-	-	12	12	-	12
	PIP NTSC V.POS	10	Fixed	-	-	10	10	-	10
	PIP H.POS	15	Fixed	-	-	15	15	-	15

4-6	Samsung Electronics

Alignment and Adjustments

4-8-2(B) SCREEN CHANGE (I2C BUS GEOMETRIC ADJUSTMENT)

1 V Shift

6 V Amp

2 V Slope

7 V SC

3 H EW

4 H Parabola

5 H Corner

8	H Trapizium

9	H Symmetry

10 H Shift

Samsung Electronics

4-7

Alignment and Adjustments

4-8-2(C) VIDEO ADJUST 1

	VIDEO ADJUST1	Initial	Adjustment	SAM2540	TXK3276	CL29A6	TXK3279	TXK3676	TXK3679
		Value	Value	SAM2740
	RED CUT OFF	127	Adjustment	127	127	127	127	127	127
	GREEN CUT OFF	127	Fixed	127	127	127	127	127	127
	BLUE CUT OFF	127	Adjustment	127	127	127	127	127	127
	RED DRIVE	127	Adjustment	127	127	127	127	127	127
	GREEN DRIVE	127	Fixed	127	127	127	127	127	127
	BLUE DRIVE	127	Adjustment	127	127	127	127	127	127
	SUB BRIGHT	110	Adjustment	100	100	100	100	100	100
	SUB CONTRAST	52	Adjustment	52	52	52	52	52	52
	SUB COLOR	27	Fixed	50	50	50	50	50	50
	SUB TINT	30	Fixed	70	70	40	70	70	70
	BCL THRESHOLD	62	Fixed	58	58	65	60	58	60
	BCLGAIN	8	Fixed	8	8	8	9	8	9
	BCL TIME	13	Fixed	10	10	6	5	10	5
	DVD SUBTint		Fixed			25	25		25
	N. YC DELAY	0		3	3	3	3	3	3

	Note 3. Beam Control Limit Characteristic	Table 1. YC Delay Adjustment Table
	beam
			NTSC
	MIN	N.YC
	1.8mA	Delay	Def.	M
	1.6mA	MAX	4	3
	BCL THESHOLD
		Value
	BCL GAIN
		The “Def.” means that TV is in AV
		mode.
	WDRGB
	50	IRE

4-8	Samsung Electronics

Alignment and Adjustments

4-8-2(D) VIDEO 2 ADJUST

	VIDEO ADJUST2	Initial	Adjustment	SAM2540	TXK3276	CL29A6	TXK3279	TXK3676	TXK3679
		Value	Value	SAM2740
	B STRETCH-BTHR	50	Fixed	50	50	50	50	50	50
	B DTRETCH-BTLT	8	Fixed	8	8	8	8	8	8
	B STERTCH-BAM	4	Fixed	4	4	4	4	4	4
	CORING	31	Fixed	31	31	31	31	31	31
	NTSC COMB FILTER	1		1	1	3	3	1	3
	RGB BRIGHT	0	Fixed	0	45	0	45	45	45
	RG B CONTRAST	0	Fixed	0	15	0	15	15	15
	EHT TIME	0	Fixed	0	0	3	8	0	8
	EHT COMPENSATION	60	Fixed	60	60	60	60	60	60
	DTI CORING		Fixed	0	0	0	0	0	0
	DTI GAIN		Fixed	1	1	1	1	1	1
	DTI BAND		Fixed	1	1	1	1	1	1
	EHT Offset	0	Fixed	-	-	0	0	-	0
	EHT Horizontal	0	Fixed	-	-	0	0	-	0

Coring : The Value of Center Frequency for the active bandwidth.

4-8-2(E) VIDEO 3 ADJUST

	VIDEO ADJUST3	Initial	Adjustment	SAM2540	TXK3276	CL29A6	TXK3279	TXK3676	TXK3679
		Value	Value	SAM2740
	PEAK Threshold	255	Fixed	255	255	255	255	255	255
	SOFT LIMIT SLOPE B	4	Fixed	4	4	4	4	4	4
	HARD LIMIT	255	Fixed	255	255	255	255	255	255
	MODULATION ON/OFF	0	Fixed	0	0	0	0	0	0
	A TILT POINT	0	Fixed	0	0	0	0	0	0
	B TILT POINT	0	Fixed	114	114	114	114	114	114
	GAIN 1 (VIDEO)		Fixed	11	31	31	31	31	31
	DELAY 1 (VIDEO)		Fixed	3	3	3	3	3	3
	PEAK VIDEO REF		Fixed	0	0	0	0	0	0
	PEAK VIDEO GAIN		Fixed	0	0	0	0	0	0
	LIMIT VALUE		Fixed	74	74	127	74	74	74
	VELOCITY DELAY		Fixed	7	7	7	7	7	7
	VELOCITY CORING		Fixed	10	10	2	10	10	10
	ACC-REF	20	Fixed	20	20	20	20	20	20
	ACCR	21	Fixed	21	21	21	21	21	21

Samsung Electronics

4-9

Alignment and Adjustments

Note 5. Soft Limit & Hard Limit

Output										Part 1								Part 2												Hard limiter
511
																									0
													Slope 1 [0...15]												2										“Soft Limit” is that Limitting
																									4
400													0																					Soft Limit Slope B
													2												6										the peak white without
													4												8
																									10			range=256...511							feed-back, but “Peak Limit” is
300													6
																									12
													8												14										that with feed-back for white
													10
																						Slope 2 [0...15]
200													12																						peak level
													14
100						tilt 1 [0...511]
																tilt 2 [0...511]
0																																	Li
0		100				200				300			400			500			600			700			800			900			1023

4-8-2(F) OPTION

		Model	CL29A6		SAM2540	TXK3276	TXK3279	TXK3279
					SAM2740	TXK3676	TXK3679	TXK3679
No.		Description	Initial Value		Initial Value	Initial Value	Initial Value	Initial Value
1	SYSTEM		CN(EN+SP+PO)		CT(EN+SP+FR)	CT(EN+SP+FR)	CT(EN+SP+FR)	CT(EN+SP+FR)
2	ACS(CT, CTA)			OFF	ON	ON	ON	OFF
3	SOUND		VIRTUAL DOLBY		STEREO	STEREO	VIRTUAL DOLBY	VIRTUAL DOLBY
4	CRT		4:3		4:3	4:3	4:3	4:3
5	AV MODE(V,Y)		2RCA + S + D		1RCA	2RCA +S	2RCA +S+D	2RCA +S+D
6	AUDIO MUTE			ON	ON	ON	ON	ON
7	X-RAY			OFF	ON	ON	ON	ON
8	VIDEO-MUTE			ON	OFF	OFF	OFF	ON
9	TILT CONTROL			ON	OFF	OFF	OFF	ON
10	GAME+DEMO(CN)			ON	OFF	OFF	OFF	OFF
11	LNA			ON	OFF	OFF	OFF	ON
12	PIP		2-TUNER		OFF	OFF	2-TUNER	2-TUNER
13	VCHIP(CT,CTA)			OFF	ON	ON	ON	OFF
14	BLUE SCREEN			ON	OFF	OFF	OFF	ON
15	AKB			ON	OFF	OFF	OFF	ON
16	AUTO POWER ON			OFF	OFF	OFF	OFF	OFF
17	HOTEL			OFF	-	-	-	OFF
	Option Byte		04 DE 12 1C		01 01 80 09	01 01 88 09	04 01 92 09
Note 6.
		V-DOLBY		MSP3451G, MSP3440GB6

4-10	Samsung Electronics

Alignment and Adjustments

4-8-2(G) OTHERS

	OTHERS	Initial	Adjustment	SAM2540	TXK3276	CL29A6	TXK3279	TXK3676	TXK3679
		Value	Value	SAM2740
	VSU	108	Fixed	105	105	98	108	105	108
	VSU2			0	0	0	0	0	0
	H QEW	0	Fixed	0	0	0	0	0	0
	H ZOOM Parabola	8	Fixed	8	8	12	12	0	0
	H 16:9 Parabola	-10	Fixed	-18	-18	-19	-19	0	0
	DVD Tint Control	0	Fixed	0	0	1	1	0	0
	PAL V SHIFT		Fixed	-29	-29	-66	-62	-29	-20
	PAL H SHIFT		Fixed	18	18	-15	-1	18	-3
	Melidy Volume	5	Fixed	7	7	7	7	7	7
	PIP BRIGHT		Fixed			3	5		5
	PIP COLOR		Fixed			7	7		7

4-8-2(G) G2 ADJUST

	G2 Adjust	Initial	Adjustment	SAM2540	TXK3276	CL29A6	TXK3279	TXK3676	TXK3679
		Value	Value	SAM2740
	MRC R G B
	MRWDG
	IBRM	-10	FIX	200	195	200	195	195	195
	WDRV	0	FIX	35	35	35	35	35	35
	CDL		FIX	150	170	200	170	170	170
	COL		FIX	130	130	120	130	130	130
	VDP Version			B	B	Y	Y	B	Y
	WHITE BALANCE		H	275,295,35	275,295,28	275,295,50	275,295,28	275,295,28	275,295,28
			L	275,295,1.2	275,295,1.0	275,295,1.5	275,295,1.0	275,295,1.0	275,295,1.0

Samsung Electronics

4-11

Alignment and Adjustments

4-9 MICOM

4-9-1 Pin Layout

Write Protect					1	I/O
EEPROM SDA					2	I/O
EEPROM SCL					3	IO
Bus-Stop					4	I/O
Main SDA					5	I/O
Main SCL					6	I/O
Sound Reset					7	I/O
Video Reset					8	I/O
VDD 2.5V					9
GND					10
VDD 3.3V					11
CVBS Input					12
VDD 2.5V					13
GND					14
AFT					15	ADC
AV1 Ident					16	ADC
AV2 Ident					17	ADC
Key 1					18	ADC
H-Sync					19
V-Sync					20
Key 3					21	I/O
Key 2					22	I/O
X-Ray Protect					23	I/O
IR Input					24	I/O
Stand-By LED					25	I/O
Time LED					26	I/O

S

I

M 4 0 8 A Y

PWM	52					Tilt
	51					N.C.
I/O	50					Power
I/O	49					Sound Mute
	48					N.C.
	47					N.C.
	46					PX. Y
	45					PX. Y
	44					VDD 3.3V
	43					GND
	42					VDD 2.5V
	41					CORE
	40					OSD-B
	39					OSD-G
	38					OSD-R
	37					VDD 2.5V
	36					GND
	35					X-TAL Out
	34					X-TAL In
	33					MICOM Reset
	32					N.C.
	31					N.C.
	30					VDD 3.3V
	29					GND
	28					N.C.
I/O	27					Relay

4-12	Samsung Electronics

Alignment and Adjustments

4-9-2 Pin Assignment Specification

PIN NO	FUNCTION		IN/OUT	ACTIVE H/L
		ASSIGN				DESCRIPTION
1	I/O	Write Protect	Out	Low		EEPROM Write Protection
2	I/O	ROM SDA	I/O			EEPROM Serial Data Line
3	I/O	ROM SCL	I/O			EEPROM Serial Clock Line
4	I/O	Bus Stop	In	Low		Disable Micom IIC
5	I/O	Main SDA	I/O			Peripheral IC Serial Data Line
6	I/O	Main SCL	I/O	Low		Peripheral IC Serial Clock Line
7	I/O	Sound Reset	Out	Low		MSP IC Initial Control
8	I/O	Video Reset	Out			VDP IC Initial Control
9	Vdd	VDD 2.5V
10	GND
11	Vdd	VDD 3.3V
12	CVBS	CVBS Input	In			TTX CVBS Input
13	Vdd	VDD 2.5V				Analog B+
14	GND					Analog Ground
15	ADC	AFT	In			Auto Fine Tuning Control
16	ADC	AV1-ID	In			AV1 Ident
17	ADC	AV2-ID	In			AV2 Ident
18	ADC	Key1	In			Key1 Input
19	HS	H-Sync	In			Horizontal Sync Input
20	VS	V-Sync	In			Vertical Sync Input
21	I/O	Key3	In			Key3 Input
22	I/O	Key2	In			Key2 Input
23	I/O	X-Ray	In			X-Ray Protection
24	I/O	IR-In	In			Remocon Signal Input
25	I/O	STD-LED	Out			LED Drive Output(Red)
26	I/O	TIM-LED	Out			LED Drive Output(Green)

Samsung Electronics

4-13

Alignment and Adjustments

4-9-2 Pin Assignment Specification (Continued)

	PIN NO		FUNCTION	ASSIGN	IN/OUT	ACTIVE H/L	DESCRIPTION
	27		I/O	Relay	Out	Low	Activate Degausssing Coil
	28		N.C.				Not Used (Programmed Gound Level)
	29		GND				Analog Ground
	30		Vdd	VDD 3.3V			Not Used (Programmed Gound Level)
	31		N.C.				Not Used (Programmed Gound Level)
	32		N.C.				Micom Hardware Reset
	33		Reset	Reset	In	Low	Crystal Oscillation Input
	34		X-In	X-TAL In	In	6MHz	Crystal Oscillation Output
	35		X-Out	X-TAL Out	Out	6MHz	Analog Ground
	36		GND				Analog B+
	37		Vdd	VDD 2.5V			OSD/Caption Output (Red)
	38		R	OSD-R	Out		OSD/Caption Output (Green)
	39		G	OSD-G	Out		OSD/Caption Output (Blue)
	40		B	OSD-B	Out		Fast Blank/Half Contrast Output
	41		COR	CORE	Out
	42		Vdd	VDD 2.5V
	43		GND
	44		Vdd	VDD 3.3V
	45		I/O	PX.Y	In		When The Caption Function Adopted, Used.
	46		I/O	PX.Y	Out
	47		N.C.				Not Used (Programmed Gound Level)
	48		N.C.
	49		I/O	S-Mute	Out	High	Sound Amp Mute
	50		I/O	Power	Out	Low	Picture On/Off Control
	51		N.C.				Not Used (Programmed Gound Level)
	52		I/O	Tilt	Out	PWM	Tilt Control Output

4-14	Samsung Electronics

Electronics Samsung

1-5

Plug in Power Cord

PowerNo 1-5

Troubleshooting.5

OFF

ON

Check

LED lamp

Abnormal

Normal

Check

Check

IC901 MICOM

MICOM IIC #5, #6

Input Voltage

Normal

Abnormal

Check and Replace

Check

the MICOM

Level Shifter Q909, Q910

Normal

Check

Abnormal

Check

Normal

Output(If 2N7000 Output has the DC

IC903 3.3V Regulator

Check and Replace

the MICOM Power #59

Normal

Component over 0.7V, it is broken)

Abnormal

With Remote Controller

Input Voltage

IC903

Abnormal

Normal

Replace

the MICOM

Check

Abnormal

Check

Abnormal

Abnormal

Replace

MICOM

Replace

Replace

Replace Q908

D801 and D811

D801 or D811

IIC #2, #3

Q909, Q910

Q908

Normal

Normal

Normal

Check

Check

Normal

Replace

Check

Abnormal

IC804 Input Voltage

Check and Replace

IC902 EEPROM

EEPROM(IC902)

Replace

IC804

Normal

IC802, IC803

IC802, IC803

Abnormal

Normal

Check

Normal

Check IC201S

Check and Replace

Check

Abnormal

R828 and D805

R828 or D805

IC201S VDP

Replace

IC201S

H-OUT #50

Abnormal

Normal

Check

Check

Abnormal

IC801S and FP801S

Replace

Q401 H-TR

Q401

Normal

Check

Abnormal

Check

135V Line

PC801S, IC801S

Normal

Replace

FBT

Note : When you check whether any component is normal, you must let the output pin be open in order not to be affected by the side of output.

Troubleshooting

Troubleshooting

5-2 No Picture

Samsung Electronics

		No Picture, but sound is
		in normal operation
		Turn the VR of FBT, higher screen
	Normal	voltage and Check the Deflection		Abnormal
		is in Normal Operation
		(If the deflection is in operation,
		flyback signal is appeared)

Normal	Check	Abnormal			Normal	Check	Abnormal
CRT PCB RK, BK, GK						IC201S #31
Check	Abnormal	Check	Abnormal			Abnormal		Abnormal
		HIC202, HIC203,			Check 8V		Check DZ202
Heater Voltage
		HIC204 Output
Normal	Check CRT and FBT		Check	Abnormal	Normal		Normal
			IC201S #63			Check		Replace
			or #59
Check CRT and FBT		Normal				IC803		DZ202
			Normal
			Replace IC201S		Check		Replace
					IC301		IC201S
		Check		Check
		200V, 16.5V Line
			Tuner CVBS Output

5-2

Troubleshooting

5-3 No Sound

No Sound, but Picture is in normal operation

Normal

Check the CN602

Abnormal

Connection and Signal

Check the Speaker

Normal

Check

Wire Connection

14V Line

Check

IC602 #7

Abnormal

(If the pin is in low state,

Sound is mute)

Normal

Check

D816, Q906

Check

Abnormal

IC601 #24, #25

Normal

Replace

IC602

Check

Abnormal

IC601 Input

Voltages (5V,8V)

Normal

Check

the coils around IC601

Check

Abnormal

IC601 Input Signal

Normal

Replace

Check

IC601

the Tuner

Abnormal

Check

FA803S

Samsung Electronics

5-3