KS7C(P) Samsung cw29z404ntxxec-.pdf

COLOR TELEVISION RECEIVER

Chassis : KS7C(P)_Timecop

Model : CW29Z404NTXXEC

SERVICE Manual

COLOR TELEVISION RECEIVER

FEATURES

■ SLIM FIT CRT

■ Multi Wide System

■ LNA Plus(Low Noise Amplifier)

■ Turbo Plus/Voice

■ Low Stand-By Power Wattag e

■ SOUND Equalizer

CW-29Z404N

Table of Contents

Chapter 1 Precaution

■ 1-1 Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

■ 1-2 Servicing Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

■ 1-3 Static Electricity Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

■ 1-4 Installation Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

Chapter 2 Product Specification

■ 2-1 Product Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

■ 2-2 Key Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

■ 2-3 Specifications Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

■ 2-4 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Chapter 3 Alignment & Adjustment

■ 3-1 Service Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

■ 3-2 How to Access Service Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

■ 3-3 Factory Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

■ 3-4 Service Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12

■ 3-5 Software Upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14

■ 3-6 Replacements & Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18

Chapter 4 Exploded View & Part List

■ 4-1 CW29Z404NTXXEC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Chapter 5 Electrical Part List

■ 5-1 CW29Z404NTXXEC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Chapter 6 Troubleshooting

■ 6-1 Checkpoints by Error Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

■ 6-2 Trouble-shooting with New Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3

■ 6-3 Troubleshooting Procedures by Error Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6

Chapter 7 Block Diagram

■ 7-1 Overall Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

■ 7-2 Partial Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2

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Chapter 8 Wiring Diagram

■ 8-1 Overall Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1

■ 8-2 Pin Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2

Chapter 9 PCB Diagram

■ 9-1 Main Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1

■ 9-2 CRT Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-3

Chapter 10 Schematic Diagram

■ 10-1 POWER & DEFLECTION BLOCK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1

■ 10-2 IF & UOC(CHROMA_MICOM)BLOCK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-2

■ 10-3 PIP & CRT BLOCK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-3

■ 10-4 AV & SOUND BLOCK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-4

Chapter 11 Operation Instruction & Installation

■ 11-1 Product Features and Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-1

Chapter 12 Disassembly & Reassembly

■ 12-1 Overhaul Disassembly & Reassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-1

Chapter 13 Circuit Description

■ 13-1 Circuit Key Point . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-1

Chapter 14 Reference Information

■ 14-1 Other issues related to other products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-1

■ 14-2 Technical Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-3

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Precaution

1. Precaution

To avoid possible damages or electric shocks or exposure to radiation, follow the instructions below with regard to safety,

installation, service and ESD.

1-1 Safety Precautions

1. Make sure all protective devices are properly installed

including non-metallic handles and compartment covers

when installing or re-installing the chassis or chassis

assemblies.

5. Warning for Engineering Changes:

Never make any changes or additions to the circuit

design or the internal part for this product.

Ex: Do not add any audio or video accessory

connectors. This might cause physical damage.

Furthermore, any changes or additions to the original

design/engineering will invalidate the warranty.

2. Make sure that no gaps exist between the cabinets for

children to insert their fingers in to prevent children from

receiving electric shocks. Gaps mentioned above include

ventilation holes of a too great magnitude between the

vaccum tube and the cabinet mask, and the improper

installation of the rear cabinet.

6. Warning - Hot Chassis:

Some TV chassis are directly connected to one end of

the AC power cord for electrical reasons.

Without insulated transformers, the product can only be

repaired safely when the chassis is connected to the

earthed end of the AC power source.

Errors may occur when the resistance is below 1.0 ㏁ or

over 5.2 ㏁ .

In these cases, make sure that the device is repaired

before sending it back to the customer.

To make sure the AC power cord is properly connected,

follow the instructions below. Use the voltmeter to

measure the voltage between the chassis and the

earthed ground. If the measurement is over 1.0V, unplug

the AC power cord and change the polarity before re-

inserting it. Measure the voltage between the chassis

and the ground again.

3. Check for Electricity Leakage (Figure 1-1)

Warning: Do not use an insulated transformer for check-

ing the leakage. Use only those current leakage testers

or mirroring systems that comply with ANSIC 101.1 and

the Underwriter Laboratory's specifications (UL1410,

59.7).

7. Some TV chassis are shipped with an additional

secondary grounding system. The secondary system is

adjacent to the AC power line. These two grounding

systems are separated in the circuit using an

unbreakable/unchangeable insulation material.

DEVICE

UNDER

TEST

LEAKAGE

CURRENT

TESTER

(READING SHOULD

NOT BE ABOVE

0.5mA)

TEST ALL

EXPOSED METAL

SURFACES

8. When any parts, material or wiring appear overheated or

damaged, replace them with new regular ones

immediately. When any damage or overheating is

detected, correct this immediately and make a regular

check of possible errors.

2-WIRE CORD

ALSO TEST WITH

PLUG REVERSED

(USING AC ADAPTER

PLUG AS REQUIRED)

EARTH

GROUND

Fig. 1-1 AC Leakage Test

9. Check for the original shape of the lead, especially that

of the antenna wiring, any sharp edges, the AC power

and the high voltage power. Carefully check if the wiring

is too tight, incorrectly placed or loose. Never change the

space between the part and the printed circuit board.

Check the AC power cord for possible damages. Keep

the part or the lead away from any heat-emitting

materials.

4. A high voltage is maintained within the specified limits

using safety parts, calibration and tolerances. When

voltage exceeds the specified limits, check each special

part.

Samsung Electronics

1-1

Precaution

10. Safety Indication:

Some electrical circuits or device related materials

require special attention to their safety features, which

cannot be viewed by the naked eye. If an original part is

replaced with another irregular one, the safety or

protective features will be lost even if the new one has a

higher voltage or more watts.

Critical safety parts should be bracketed with ( ).

Use only regular parts for replacements (in particular,

flame resistance and dielectric strength specifications).

Irregular parts or materials may cause electric shock or

fire.

1-2

Samsung Electronics

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