Samsung CK3338ZR4X, CK5038ZR4X, CK5338ZR4X Service manual

COLOR TELEVISION RECEIVER

Chassis : SCT13B

Model: CK3338ZR4X/BWT

CK5038ZR4X/BWT

CK5338ZR4X/BWT

	COLOR TELEVISION RECEIVER				CONTENTS
			1.		Precautions
			2.		Specifications and IC Data
			3.		Disassembly and Reassembly
			4.		Alignment and Adjustment
			5.		Troubleshooting
			6.		Exploded View and Parts List
			7.		Electric Parts List
			8.		Block Diagram
			9.		PCB Layout Diagram
			10.		Wiring Diagram
			11.		Schematic Diagrams

ELECTRONICS

©Samsung Electronics Co., Ltd. MAY.1998 Printed in Korea

3SCT13B-38K301

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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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

Specifications and IC Data

2. Specifications and IC Data

2-1 Specifications

Television System:

MODEL

SYSTEM

CI

PAL-I (UHF)

CII

PAL-I (VHF/UHF)

CX

PAL-B/G, SECAM-B/G

CK

PAL-B/G, D/K, SECAM-B/G, D/K

CW

PAL-B/G, D/K, SECAM-B/G, D/K, NT 4.43

CS

PAL-B/G, D/K, SECAM-B/G, D/K, NT4.43, NT3.58

Channels:

System

PAL/SECAMPAL,

SECAM-K1, NTSC - M

Band

B/G,I

SECAM- D/K

PAL-D

VHF

2 - 12

1 - 13

2 - 9

2 - 13

UHF

21 - 69

21 - 69

13 - 57

14-69

Intermediate Frequencies (MHz) :

SYSTEM

PAL/

PAL/SECAM-D/K,

PAL - I

NTSC - M

IF Carrier Frequency

SECAM- B/G

SECAM-K1

Picture IF Carrier

38.90

38.90

38.90

38.90

Sound IF Carrier

33.40

32.40

32.90

34.40

Color Sub Carrier

34.47

34.47

34.47

35.32

Picture Tube:

14 Inch

A34KQV42X

Quick start, in-line-gun,

20 Inch

A48KRD82X

Black stripe, 90 degree deflection

21 Inch

A51KQJ63X

Power Requirements:

AC 100~260V, 50/60Hz

Antenna Input Impedance:

VHF, UHF : Telescopic dipole antenna (75 ohm unbalanced type )

Speaker Impedance

8 ohm, 5W+5W (Dual Type)

16 ohm, 3W (Monitor Type)

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Specifications and IC Data

2-2 IC Line Up

			Table 2-1 IC Line-Up
	Loc. No	Specification	Description	Remark
	HC101	PAP102	IF PRE-AMP
	IC201	TDA8374A N3	PAL-B/G, SECAM-B/G, NTSC	Philips
	IC202	TDA4665	1H DELAY	SECAM
	IC203	TDA8395P	SECAM DECODER	MODULE
	IC301	TDA8356	VERTICAL OUTPUT
	IC501	TDA6107Q	RGB DRIVE AMP
	IC601	TDA7056B	SOUND-AMP (3.5W)	Monitor Type
	IC602	TDA7057AQ	SOUND-AMP (5W+5W)	Dual Type
	IC801	KA3S0680R	POWER IC (STR)
	IC802	KA7630	CUSTOM REGULATOR (5V, 8V)
		SZM193EA	W/O TTX, English/French/Arabian
		SZM193EV	W/O TTX, English/Vietnames/Indonesian/Maly/Thai
		SZM193EC	W/O TTX, English/Chinese
		SZM191EC	W/O TTX, English/Chinese	Zilog
				(Non TTX)
		SZM193EE	W/O TTX, English/German/French/Dutch/Italian/Spanish,
			Swedish/Romanian/Hungarian/Croatian/Polish/Russian,
			Czech/Bulgarian/Yugo/Greek
	IC901
		SZM191ER	W/O TTX, English/Russian (Only for Oceania model)
		SPM197EE	TTX, West : English/German/French/Dutch/Italian/Spanish/Swedish
			East : English/Czech/Croatian/Romanian/Hungarian/Polish
		SPM197ER	TTX, English/Russian/Bulgarian
		SPM197EP	TTX, English/Iranian	Philips
				(TTX)
		SPM197EA	TTX, English/French/Arabian
		SPM197EG	TTX, English/Greek/Yugo
	IC902	24C04	EEPROM
	IC903	KiA7042P	RESET IC ,W/O TTX Model	Zilog
		KiA7442P	TTX Model	Philips
	IC401	KA7812	REGULATOR (12V)
	PC801	LTV817B	PHOTO COUPLER	NEC

2-2	Samsung Electronics

Specifications and IC Data

2-3 Semiconductor Base Diagrams

ELECTROLYTIC-

CONDENSER

TRANSISTOR

2SD1651

2SD1650

KSD5072

KSD5071

KSD1711

B

C E

DIODE

IC

TDA4665(Pin 16)

TDA837X(Pin 56)

Z8933112PSC(Pin 42)

X24CO4P(Pin 8)

TDA8395(Pin 16)

TDA4665(Pin 16)

					SAW-FILTER
TRANSISTOR				IC

	UPC574J	K6259K
KSA815-Y	or
	KA33V
KSA539-Y

E B C

IC	TRANSISTOR	TRANSISTOR
	TDA8133
	TDA8356	KSR1012
	TDA6101Q
		KSR1010
	KA7812
	KA7809	KSR2010
	KA78R05

IN		E C B
G	OUT

Fig. 2-1 Semiconductor Base Diagrams

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MEMO

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Disassembly and reassembly

3. Disassembly and Reassembly

3-1 Back Cover Removal

1. After removing the 9 screws, pull the cabinet backwards.

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3-1

Disassembly and reassembly

3-2 Speaker Removal

1. Loosen the 4 screws and remove the holder - speakers.

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Disassembly and reassembly

3-3 CRT Removal

1.Spread a soft mat on the floor. Place the TV set face down.

2.Remove the 4 screws mounting the CRT to the front cabinet.

3.Lift the CRT.

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MEMO

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Alignment and Adjustments

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.

4-1-3 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).

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.

2.If the EEPROM or CRT is replaced, set SC and PVA to 10 and 45 (Factory mode).

SC : 14, 16 Inch : 0 20, 21 Inch : 10

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)SLEEP→FACTORY.

(2)STAND-BY→P.STD→HELP→SLEEP

→POWER ON.

2.The “SERVICE (FACTORY)” message will be displayed. The Service Mode has four components: Adjustment, Test Pattern, Option Bytes 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 PAL system:

DOWN or UP key: AGC>VCO>SBT>SCT>SCR>SC>RG> GG>BG>CDL>BLU>PSL>PVS>PVA>PHS

5. Selection sequences for the NTSC system:

DOWN or UP key: AGC>VCO>SBT>SCT>SCR>SC>RG> GG>BG>CDL>BLU>NSL>NVS>NVA>NHS

6.The VOLUME keys increase or decrease the adjustment values, (stored in the

non-volatile memory when Adjustment Mode is cancelled).

7.Cancel the Adjustment Mode by re-pressing the “FACTORY” or Power OFF.

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Alignment and Adjustments

4-2-2 Main Adjustment Parameter

Table 4-1 Main Adjustment Parameter (Zilog, Phlips μ-com)

	FUNCTION	OSD ABBREVIATION	RANGE	INITIAL DATA	REMARKS
	AUTO GAIN CONTROL	AGC	0 ~ 63 STEP	32
	SUB BRIGHT	SBT	0 ~ 23 STEP	7
	SUB CONTRAST	SCT	0 ~ 23 STEP	7
	SUB COLOR	SCR	0 ~ 23 STEP	13
	RED DRIVE GAIN	RG	0 ~ 63 STEP	32
	GREEN DRIVE GAIN	GG	0 ~ 63 STEP	32
	BLUE DRIVE GAIN	BG	0 ~ 63 STEP	32
	PAL VERTICAL SLOPE	PSL	0 ~ 63 STEP	20
	PAL VERTICAL SHIFT	PVS	0 ~ 63 STEP	32	TDA8374
	PAL VERTICAL AMPLITUDE	PVA	0 ~ 63 STEP	45
	PAL HORIZONTAL SHIFT	PHS	0 ~ 63 STEP	32
	NTSC VERTICAL SLOPE	NSL	0 ~ 63 STEP	20
	NTSC VERTICAL SHIFT	NVS	0 ~ 63 STEP	32
	NTSC VERTICAL AMPLITUDE	NVA	0 ~ 63 STEP	45
	NTSC HORIZONTAL SHIFT	NHS	0 ~ 63 STEP	32
	VOLTAGE CONTROL OSCILLATOR	VCO	0 ~ 128 STEP	64
	S-CORRECTION	SC	0 ~ 63 STEP	32
	TTX SUB-CONTRAST	TSS	0 ~ 63 STEP	16
	CATHODE DRIVE LEVEL	CDL	0 ~ 7 STEP	3	TDA8842
	BLUE STRETCH MODE	BLU	0 ~ 3 STEP	2

NOTE : PVS,PVA, PHS, NVS, NVA,NHS parameters must be aligned using both the 50Hz and 60Hz vertical-field rates.

4-2	Samsung Electronics

Alignment and Adjustments

4-2-3 Test Pattern (Aging Mode)

1.This mode can be used during servicing, or for confirming that the convergence and purity adjustments are correct.

2.Access the Test Pattern parameters by pressing a CHANNEL keys (▲ ,▼) while the Service Mode is on. The cursor will move to the test pattern. Press the VOLUME keys. On-screen display:

°·RED
°·GREEN
								NON -TTX MICOM ONLY
°·BLUE
°·AGING								TTX MICOM

3.AGING Mode (Reference Only)

This pattern is used for pre-heating the CRT during manufactur- ing—it is accessed in the factory by twice pressing the “SLEEP → FACTORY→FACTORY “ key, then white pattern will be displayed.

Even if the TV power is cut off, the Aging Mode is not cancelled, The aging mode is cancelled by repressing the “FACTORY” key or pressing the local “CH UP/DOWN” key.

The patterns are displayed at 5 sec intervals : NON-TTX Micom only.

4-2-4 Option Bytes

In the Service Mode, various can be selected via the Option Bytes (8 bits each). Example:

SYSTEM OSD DISPLAY		BIT 6	BIT 5		BIT 4	BIT 3	BIT 2	BIT 1		BIT 0
BYTE 0 : 8	-				L (BIT : 0)	H (BIT : 8)	L (BIT : 0)	L (BIT : 0)		L (BIT : 0)
BYTE 1 : 0	-	L (BIT :0)	L (BIT : 0)		L (BIT : 0)	L (BIT : 0)	L (BIT : 0)	L (BIT : 0)		L (BIT : 0)
TDA8374, CK SYSTEM, RCA JACK SYSTEM OSD DISPLAY
BYTE 0 : 11					L (BIT : 1)	H (BIT : 0)	L (BIT : 0)	H (BIT : 0)		L (BIT : 1)

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