SAMSUNG CS30A9NX3XXSE Service Manual

COLOR TELEVISION RECEIVER

Chassis : S51A Model: CS30A9NX3X/XSE

CS30A4V3X/XSE

COLOR TELEVISION RECEIVER CONTENTS

Precautions

Specifications and IC Data

Disassembly and Reassembly

Alignment and Adjustment

Troubleshooting

Exploded View and Parts List

Electric Parts List

Block Diagram

PCB Layout Diagram

Wiring Diagram

Schematic Diagrams

10.

11.

ELECTRONICS

Samsung Electronics Co., Ltd. MAR.1999

Printed in Korea

3S51A-3007

1. Precautions

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.

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.

Precautions

Samsung Electronics 1-1

LEAKAGE CURRENT

TESTER

DEVICE UNDER

TEST

TEST ALL

EXPOSED METAL

SURFACES

2-WIRE CORD

ALSO TEST WITH

PLUG REVERSED

(USING AC ADAPTER

PLUG AS REQUIRED)

EARTH

GROUND

(READING SHOULD

NOT BE ABOVE

0.5mA)

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 (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.

Precautions

1-2 Samsung Electronics

1-2 Servicing Precautions

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.

Precautions

Samsung Electronics 1-3

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. 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.

Precautions

1-4 Samsung Electronics

1-3 Precautions for Electrostatically Sensitive Devices (ESDs)

Specifications and IC Data

Samsung Electronics 2-1

2. Specifications and IC Data

2-1 Specifications

Televisio n System:

C hann els:

Interm ediate-F requ en cies(MHz ):

P icture T ub e:

Power R equirem ents: AC 100 ~ 260V, 50/60HZ or AC 160 ~ 260V, 50/60HZ

Antenna Input Im pedanc e :

VHF ,UHF: Telesc opic dipo le antenn a(75Ωunb alanced type)

Speak er Im ped ance : 8Ω,10W+10W

MODEL SYSTEM

CI PAL-I (UHF)

CII PAL-I (VHF/UHF) CX P AL -B/G,SEC AM-B/G CK PAL-B/G,D/K,SE CAM-B/G ,D/K CB PAL-B/G CS PAL-B/G,D/K,SE CAM-B/G ,D/K,NT4.43,NT3.58

SYSTEM

BAND

PAL/SECAM

-B/G,I

PAL/SECAM

-D/K

SECAM-K1,

PAL-D

NTSC-M

VHF 2-12 1-13 2-9 2-13 UHF 21-69 21-69 13-57 14-69

SYSTEM

BAND

PAL/SECAM

-B/ G

PAL/SECAM

-D/K,K1

PAL-I NTSC-M

Picture IF Carrier 38.90 38.90 38.90 38.90

Sound IF C arrier 33.40 32.40 32.90 34.40

Color Sub Carrier 34.47 34.47 34.47 35.32

25 Inch A59KPR84 X

Quick start,in-line-gun, Black stripe,90°degree d eflection

29 Inch 30 Inch

A68KVL74X A70QBZ791X

2-2 IC Line Up

Specifications and IC Data

2-2 Samsung Electronics

LOC NO NO Specification Description Remarks

HIC 101 1 PAP103T IF P RE-AMP

IC201 2

TDA8844 PAL/SECAM/NTSC /SE CAM-L

TDA8843 PAL/NTSC IC301 3 LA7845 VER TICAL DEFLE CTION AMP IC501 4 TDA6108 RGB DRIVE AMP

IC601 5

TDA7297 SOUND AMP(10W/CH)

TD A7266S SOUND AMP(5W/C H) IC701 6 TDA9859 AUDIO PROCESSOR IC801 7 KA3S1265R SMP S IC(12A) IC802 8 PC 123Y PHOTO COUP LER IC803 9 78R 0 5 SWITCHING R EGULATOR IC804 10 KA7630 SWITCHING REGULATOR(5,8V) IC901 11 SZM503AT MICOM IC902 12 24C 040 EEPROM ICE01 13 4558 EW DRIVE AMP ICN01 14 TDA9808 SIF DETEC TOR

NICAM

MODULE

ICN02 15 TD A9874H NICAM DEMODULATOR ICA01 16 LA7567N SIF DE TEC TOR

A2 STEREO

MODULE

ICA02 17 TDA9873H A2 DEMODULATOR

ICM01 18 L A7566 SIF & FM DETECTOR MONO ICP01 19 TEA5114 VIDE O SWITCH

PIP

MODULE

ICP02 20 TD A9160A PAL/NTSC DEC ODER ICP03 21 SDA9288 PIP VIDEO PR OCESS

ICT01 22 SAA5261 TTX-DEC ODER

TTX

MODULE

ICT02 23 24C 0 2 EEPROM(TTX PAGE MEMORY)

2-3 Semiconductor Base Diagrams

Specifications and IC Data

Samsung Electronics 2-3

ELECTROLYTICCONDENSER

DIODE

TDA4665(Pin 16) TDA837X(Pin 56) Z8933112PSC(Pin 42) X24CO4P(Pin 8) TDA8395(Pin 16) TDA4665(Pin 16)

TRANSISTOR TRANSISTOR

TDA8133

KA7812

OUT

TRANSISTOR

2SD1651 2SD1650 KSD5072 KSD5071 KSD1711

E B C

KSA815-Y KSA539-Y

UPC574J

KA33V

G1962 K2950M K9253M

SAW-FILTER

E C B

KSR1012 KSR1010 KSR2010

Fig. 2-1 Semiconductor Base Diagrams

2-4 Samsung Electronics

MEMO

Disassembly and reassembly

Samsung Electronics 3-1

3. Disassembly and Reassembly

3-1 Back Cover Removal

1. After removing the 7 screws, pull the cabinet backwards.

3-2 Main Board Removal

Disassembly and reassembly

3-2 Samsung Electronics

1. Separate the TBC-wire 2P connector from GT501,GT502.

2. Separate the CRT Assay from the CRT socket.

3. Remove the Anode Cap from the CRT.

4. Separate the D-Coil Connector from CN802.

5. Separate the AC cord from CN801.

6. Separate the DC connector from CN401.

7. Separate the CN501B 8P CRT connector from CN501.

8. Separate the CNA05 5P A/V side connector from CN602.

9. Separate the CNA01 8P CRT connector from CN701.

10. Separate the Focus,Screen Wire from the FBT clamper.

11. Separate the TBC wire 2P, speaker wires from the wire clamper.

12. Separate the CN701, CN602 connector from the wire clamper.

13. Separate the AC cord from the wire clamper.

14. Remove the main board by pulling it with both hands.

3-3 Speaker Removal

Disassembly and reassembly

Samsung Electronics 3-3

1. Remove the speaker by pressing the tension rib.

1. Separate the speaker wires from D-coil

(located on the bottom to the right side).

2. Remove the screws.

+ 28 hidden pages