Samsung CB15K22TX, CF15K22ZX, CS14H3ZS, CS503ESC, CS20H3ZS Service manual

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COLOR TELEVISION RECEIVER

Chassis : KS1A

Model : CB15K22TX/XET

CB15K22TX/XEG

CF15K22ZX/XEF

CS14H3ZS/CBM

CS503ESC/AOI

CS20H3ZS/CBM

CS20S4SS/CBM

CS21D8SC/SSA

CS21S4STS/CBM

CS21S4WX/VWT

COLOR TELEVISION RECEIVER CONTENTS

Precautions

Specifications and IC Data

Disassembly and Reassembly

Alignment and Adjustment

Troubleshooting

Exploded View and Parts List

Electrical Parts List

Block Diagram

Wiring Diagram

Schematic Diagrams

10.

SAMSUNG

ELECTRONICS

Printed in Korea

AA68-02137A

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 leakage-

current 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 power-

plug 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 pro-

hibit 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 ser-

vicing 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

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 overheat-

ing, 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 compo-

nent 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

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)

Samsung Electronics 2-1

Specifications and IC Data

2. Specifications and IC Data

2-1 Specifications

Television System:

Channels:

Intermediate Frequencies (MHz) :

Picture Tube:

Power Requirements:

Antenna Input Impedance:

Speaker Impedance

NTSC - M

2 - 13

14-69

NTSC - M

38.90

34.40

35.32

PAL/SECAM-

B/G,I

2 - 12

21 - 69

PAL/

SECAM- B/G

38.90

33.40

34.47

System

Band

VHF

UHF

SYSTEM

IF Carrier Frequency

Picture IF Carrier

Sound IF Carrier

Color Sub Carrier

PAL,

SECAM- D/K

1 - 13

21 - 69

PAL/SECAM-D/K,

SECAM-K1

38.90

32.40

34.47

SECAM-K1,

PAL-D

2 - 9

13 - 57

PAL - I

38.90

32.90

34.47

MODEL

CII

14 Inch

20 Inch

21 Inch

AC 100~240V, 50/60Hz

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

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

16 ohm, 3W (Monitor Type & Dual Type)

SYSTEM

PAL-I (UHF)

PAL-I (VHF/UHF)

PAL-B/G, SECAM-B/G

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

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

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

A34KQV42X

A48KRD82X(H)

A51KQJ63X

Quick start, in-line-gun,

Black stripe, 90

degree deflection

2-2 Samsung Electronics

2-2 IC Line Up

Specifications and IC Data

Loc. No Specification Description Remark

HC101 PAP103 IF PRE-AMP

IC501 TDA6107Q RGB DRIVE AMP

Table 2-1 IC Line-Up

IC902 24C08/KS28C040 EEPROM

PC801S TCET1108 / LTV817B PHOTO COUPLER

SPM802ER

TTX, English/Croatian/Romanian/Hungarian/Polish/Czech/

Bulgarian/Russian/Portugal

IC201S

Philips

SPM802ERN

W/O TTX, English/Croatian/Romanian/Hungarian/Polish/Czech/

Bulgarian/Russian/Portugal

VERTICAL OUTPUT

LA7840

TDA7266S

IC301

IC601

SOUND-AMP (3W x 1CH or 3W x 2CH or 5W x 2CH)

IC801S

KA5Q0765R

POWER IC (STR)

IC802 KA7632

CUSTOM REGULATOR (5V, 8V, 3.3V)

IC101 U4468B

SIF - IC

TEMIC

Sanyo

2-3 Semiconductor Base Diagrams

Specifications and IC Data

Samsung Electronics 2-3

ELECTROLYTIC-

CONDENSER

DIODE

SPM-802ERN(Pin 64)

SPM-802ER(Pin 64)

X24CO8P(Pin 8)

KS24C080(Pin 8)

U4468B(Pin 16)

TRANSISTOR

LA7840

TDA6107Q

KA7632

TRANSISTOR

2SD1651

2SD1650

2SD2499

KSA614

E B C

KSC815-Y

KSA539-Y

BC548

KTC9014

UPC574J

KA33V

SAW-FILTER

E C B

KSR1012

KSR1010

KSR2010

KTD863-Y

KSC2331-Y

G3956M

K9260M

Fig. 2-1 Semiconductor Base Diagrams

2-4

MEMO

Alignment and Adjustments

Samsung Electronics 4-1

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.

4-1-2 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.

4-1-3 When CRT Is Replaced

1. Make the following adjustments AFTER set-

ting up after setting up purity and conver-

gence :

White Balance

Sub-Brightness

Vertical Center

Vertical Size

Horizontal Size

Fail Safe (This adjustment must be the last

step).

2. If the EEPROM or CRT is replaced, set PVA to

40 (factory mode) and set SC as follows.

14 inch : 0

20 inch : 9

21 inch : 9

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) DISPLAY→FACTORY.

(2) STAND-BY→ DISPLAY→ MENU→ MUTE

→POWER ON.

2. The “SERVICE (FACTORY)” message will be

displayed. The Service Mode has four compo-

nents: ADJUST, OPTION and Reset.

3. Access the Adjustment Mode by pressing the

“VOLUME” keys ( Up or Down). The adjust-

ment parameters are listed in the accompany-

ing table, and selected by pressing the CHAN-

NEL keys (▲ ,▼).

4. Selection sequences for the all system:

DOWN or UP key:

SCT>SBT>BLR>BLB>RG>GG>BG>VSL>

VS>VA>HS>SC>SDL>STT>SSP>PDL>

NDL>PSR>NSR>AGC>VOL>LCO>TXP

5. The VOLUME keys increase or decrease the

adjustment values (stored in the

non-volatile memory) when Adjustment Mode

is cancelled.

6. Cancel the Adjustment Mode by re-pressing

the “FACTORY” or “Power OFF” keys.

4-2-2 Main Adjustment Parameter

NOTE : PVS,PVA, PHS, parameters must be aligned using the 50Hz vertical-field rates.

Alignment and Adjustments

4-2 Samsung Electronics

SCT Sub Co ntra s t 0~23

SBT Sub Bri g ht n e s s 0~23

BLR Bl ac k Le v el offse t Blue 0~15

BLB Bl ac k Le v el offse t Red 0~15

RG R e d Ga i n 0~63

GG Green Gai n 0~63

BG Bl u e Gai n 0~63

VSL Ve rt i ca l Slo pe 0~63

VS Vert i ca l Shi ft 0~63

VA Ver t ical Am pli tude 0~63

HS Hori zontal Shif t 0~63

SC S- Corre c t io n 0~63

CDL Cat hode Drive Level 0~15

STT Sub Tint 0~7

SSP Sub Sharpness 0~7

PD L PAL Del ay 0~15

NDL NTSC Delay 0~15

PSR PAL Sub coloR 0~23

NSR NTSC Sub col oR 0~23

AGC Automat ic Gain Cont r ol 0~63

VOL Volume pre s et t i ng 0~63

LCO SECAM

L Vis ion I F 0~1

TXP TTX Pos ition 0~15

25(Fix)

40(Fix)

15(Fix)

OSD FUNCTION RANGE INITIAL DATA REMARK

Alignment and Adjustments

Samsung Electronics 4-3

4-2-3 Option Bytes

In the Service Mode, various can be selected via the Option Table. Example:

Option Table : xx xx xx xx

LNA

SYSTEM

AUDIO

JACK

ZOOM

AUTO POWER

SBL

2nd SIF

HOTEL MODE

BKS

MONO

RCA

NOR/ZOOM/16:9

OFF

Alignment and Adjustments

4-4 Samsung Electronics

4-3 Other Adjustments

4-3-1 General

1. Usually, a color TV needs only slight touch-

up adjustment upon installation. Check the

basic characteristics such as height, horizontal

and vertical sync and focus.

2. The picture should have good black and white

details. There should be no objectionable

color shading; if color shading is present, per-

form the purity and convergence adjustments

described below.

3. Use the specified test equipment or its equiva-

lent.

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 isola-

tion transformer.

4-3-2 Automatic Degaussing

A degaussing coil is mounted around the pic-

ture 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 sec-

ond after the power is switched ON. If the set

has been moved or turned in a different direc-

tion, disconnect its AC power for at least 30

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 removing

power.

4-2-4 RESET

The Reset Mode is used during factory inspection.

Function Reset:

1. Picture Custom

2. Auto Volume Off

3. Color System Auto (option)

4. Sound System D/K (option)

5. Blue Screen Off

6. Low Noise AMP Off (option)

7. Volume 10

8. CH. Skip Erased

9. CH. Lock Off

10. Timer Off

Alignment and Adjustments

Samsung Electronics 4-5

4-3-3 High Voltage Check

CAUTION: There is no high voltage adjustment on this chassis.

The B+ power supply must be set to +125 volts (Full color bar 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 cur-

rent).

3. The high voltage should not exceed 27.5KV.

4. Adjust the Brightness and contrast controls to

both extremes. Ensure that the high voltage

does not exceed 27.5KV under any conditions.

4-3-4 FOCUS Adjustment

1. Input a black and white signal.

2. Adjust the tuning control for the clearest pic-

ture.

3. Adjust the FOCUS control for well defined

scanning lines in the center area of the screen.

4-3-5 Cathode Voltage Adjustment

(Screen Adjustment)

1. Connect CRT socket pin GK to an oscilloscope

probe.

2. Input a gray scale pattern. (Use a pattern gen-

erator, PM5518)

3. Use the P mode key (on the remote control)

for the STANDARD picture.

4. Adjust the Screen VR (on the FBT) so that the

voltage on the oscilloscope becomes 120+2.5V

(See Fig. 4-1).

4-3-6 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. 4-2.

4. Input a black and white signal.

5. Fully demagnetize the receiver by applying an

external degaussing coil.

6. Turn the CONTRAST and BRIGHTNESS con-

trols to maximum.

7. Loosen the clamp screw holding the yoke.

Slide the yoke backward or forward to pro-

vide vertical green belt. (Fig. 4-3).

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.

Fig. 4-1

120 2.5V

GND

14" :120 2.5V

20, 21" : 120 2.5V

Alignment and Adjustments

4-6 Samsung Electronics

4-3-7 White Balance Adjustment

Fig. 4-2 Convergence Magnet Assembly

4 Pole Magnet

6 Pole Magnet

2 Pole Magnet

Clamper

Screw

2 POLE

PURITY

YOKE

CLAMP

SCREW

6 POLE

CONVERGENCE

4 POLE

CONVERGENCE

ADJUST THE ANGLE

(VERTICAL LINES)

Fig. 4-3 Center Convergence Adjustment

31m/m

Vertical Green Belt

Fig. 4-4

(a) Set up

1. Warm up the TV for at least 30 minutes in the

Aging Mode (OSD White). This mode is dis-

played by entering the following sequence:

DISPLAY

→FACTORY → FACTORY

2. Input a Toshiba pattern.

(b) Low-Light Adjustment

1. Set SBT to 3.5 ± 0.5 fL in the Factory Service

Mode with using CA100. See Fig. 4-4

➁.

2. Adjust RG,BG so that the levels are suitable to

each local area.

1. Set SCT to 55 FL (20”. 21”), 65 FL(14”) in the

Factory Service Mode with using CA100. See

Fig. 4-4

①.

Alignment and Adjustments

Samsung Electronics 4-7

4-3-8 Center Convergence Adjustment

1. Warm up the receiver for at least 20 minutes.

2. Adjust the two tabs of the 4 pole magnets to

change the angle between them. Superimpose

the red and blue vertical lines in the center

area of the screen.

3. Adjust the Brightness and Contrast controls

for a well defined picture.

4. Adjust the two-tab pairs of the 4 pole mag-

nets, and change the angle between them.

Superimpose the red and the blue vertical

lines in the center area of the screen.

5. Turn the both tabs at the same time, keeping

the angle constant, and superimpose the red

and blue horizontal line in the center of the

screen.

6. Adjust the two-tab pairs of the 6-pole magnets

to superimpose the red and blue line onto the

green. (Changing the angle affects the vertical

lines, and rotating both magnets affects the

horizontal lines.)

7. Repeat adjustments 2~6, if necessary.

8. Since the 4-pole magnets and 6-pole magnets

interact, the dot movement is complex

(Fig. 4-5).

Fig. 4-5 Center Convergence Adjustment

RED

BLUE

RED

4-Pole Magnet Movement

GREEN

RED/BLUE

GREEN

6-Pole Magnet Movement

4-3-9 RF AGC Adjustment

Set the AGC data to 23 (Factory Mode).

4-3-10 Sub-Color Adjustment

Set data to (Factory Mode).

4-3-11 Geometry Adjustment

SC →VS→VSL→HS

1. Input a lion head pattern (in the PAL channel).

2. Set the SC (S-Correction) as follows : 9 (21”),

9 (20”), 0 (14”) and VA 40 so that the lion

head circle becomes oval.

3. Adjust with VSL (Vertical-Slope) so that the

bottom margin of the picture is 4.

Fig. 4-7

4. Adjust with VS (Vertical shift) so that the top

margin of the picture is 4.

Fig. 4-8

5. Adjust with HS (Horizontal Shift) so that the

lion-head pattern and CRT centers are aligned.

Fig. 4-9

6. Adjust HS (using the width coil) so that the

left and right margins of the picture are 5.

Alignment and Adjustments

4-8 Samsung Electronics

PSR

NSR

Samsung Electronics

Troubleshooting

5-1

5. Troubleshooting

5-1 No Video (Raster On, No Sound)

Yes

Open the IF Pin of Tuner

Check/Replace

TU01S

Measure the

Voltage of Each Pin

of TU01S

Check IC201S

Pins 2,3

See "No Video"

(Sound OK)

See "No Sound"

(Video OK)

Check/Replace

IC201S

Yes

Check/Replace

IC501, IC201S

Check IC201S

Pins 40,49,50

See "No Sound"

(Video OK)

5-2 Samsung Electronics

5-2 No Power

Troubleshooting

Yes

Check the 125V,

13.0V B

Lines

Check IC802

Pin 8 (8V)

Pin 9 (9V)

Pin 10 (5V)

Check/Replace

IC801S, D801S, D802S,

D803S,D804S,FP801S

Check/Replace

IC802 (KA7632)

Check IC201S

Pin 1 : Stand-by : 0V

Normal : 3.3V

Check/Replace

IC201S

Check IC201S

Pin 1 (3.3V)

Check/Replace

IC201S, (µ-com).

Check IC201S,

Pin 33 (H-out)

Check/Replace

IC201S, Q401, Q402.

+ 46 hidden pages