Samsung pcl6215r3c service manual

PROJECTION TV RECEIVER

Chassis : P54A(REV. 2) Model: PCL545RX/XAA PCL5415RX/XAA

PCL5415R3C/XAA PCL6215R3C/XAA HCL552WX/XAA HCL5515WX/XAA HCL652WX/XAA HCL6515WX/XAA HCL473WX/XAA HCL4715WX/XAA ST54J9P3S/XAX ST62J9P3S/XAX

PROJECTION TV RECEIVER CONTENTS

Precautions

Reference Information

Specifications

Alignment and Adjustments

Troubleshooting

Exploded View and Parts List

Electric Parts List

Block Diagrams

Wiring Diagram

Schematic Diagrams

1.

2.

3.

4.

5.

6.

7.

8.

9.

10.

ELECTRONICS

Printed in Korea

AA68-

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.

9. When some parts inside the optical engine (except lamp) are damaged, replace the whole optical engine.

Precautions

Samsung Electronics 1-3

Warning 1 : 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.

Warning 2 : An electrolytic capacitor installed with the wrong polarity might explode.

“CAUTION : Double-pole/neutral fusing”

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.

Precautions

1-4 Samsung Electronics

Reference Information

Samsung Electronics 2-1

2. Reference Information

2-1 Tables of Abbreviations and Acronyms

A Ah Å dB dBm

°C °F °K F G GHz g H Hz h ips kWh kg kHz kΩ km km/h kV kVA kW I MHz

Ampere Ampere-hour Angstrom Decibel Decibel Referenced to One Milliwatt Degree Celsius Degree Fahrenheit degree Kelvin Farad Gauss Gigahertz Gram Henry Hertz Hour Inches Per Second Kilowatt-hour Kilogram Kilohertz Kilohm Kilometer Kilometer Per Hour Kilovolt Kilovolt-ampere Kilowatt Liter Megahertz

MV MW MΩ m µA µF µH µm µs µW mA mg mH mI mm ms mV nF

Ω

pF Ib rpm rps s V VA W Wh

Megavolt Megawatt Megohm Meter Microampere Microfarad Microhenry Micrometer Microsecond Microwatt Milliampere Milligram Millihenry Milliliter Millimeter Millisecond Millivolt Nanofarad Ohm Picofarad Pound Revolutions Per Minute Revolutions Per Second Second (Time) Volt Volt-ampere Watt Watt-hour

Table 2-1 Abbreviations

Reference Information

2-2 Samsung Electronics

Table 2-2 Table of Acronyms

ABL AC ACC AF AFC AFT AGC AM ANSI APC APC A/V AVC BAL BPF B-Y CATV CB CCD CCTV Ch CRT CW DC DVM EIA ESD ESD FBP FBT FF FM FS GND G-Y H HF HI-FI IC IC IF

Automatic Brightness Limiter Alternating Current Automatic Chroma Control Audio Frequency Automatic Frequency Control Automatic Fine Tuning Automatic Gain Control Amplitude Modulation American National Standards Institute Automatic Phase Control Automatic Picture Control Audio-Video Automatic Volume Control Balance Bandpass Filter Blue-Y Community Antenna Television (Cable TV) Citizens Band Charge Coupled Device Closed Circuit Television Channel Cathode Ray Tube Continuous Wave Direct Current Digital Volt Meter Electronics Industries Association Electrostatic Discharge Electrostatically Sensitive Device Feedback Pulse Flyback Transformer Flip-Flop Frequency Modulation Fail Safe Ground Green-Y High High-Frequency High Fidelity Inductance-Capacitance Integrated Circuit Intermediate Frequency

I/O L L LED LF MOSFET MTS NAB NEC NTSC OSD PCB PLL PWM QIF R RC RF R-Y SAP SAW SIF SMPS S/N SW TP TTL TV UHF UL UV VCD VCO VCXO VHF VIF VR VTR VTVM TR

Input/output Left Low Light Emitting Diode Low Frequency Metal-Oxide-Semiconductor-Field-Effect-Tr Multi-channel Television Sound National Association of Broadcasters National Electric Code National Television Systems Committee On Screen Display Printed Circuit Board Phase-Locked Loop Pulse Width Modulation Quadrature Intermediate Frequency Right Resistor & Capacitor Radio Frequency Red-Y Second Audio Program Surface Acoustic Wave(Filter) Sound Intermediate Frequency Switching Mode Power Supply Signal/Noise Switch Test Point Transistor Transistor Logic Television Ultra High Frequency Underwriters Laboratories Ultraviolet Variable-Capacitance Diode Voltage Controlled Oscillator Voltage Controlled Crystal Oscillator Very High Frequency Video Intermediate Frequency Variable Resistor Video Tape Recorder Vacuum Tube Voltmeter Transistor

IC655 TDA7265

ICS801 TNY253P

IC301 LA7845 IC471 TL494CN

ICZ103,104 STK392-040

IC431 MC4558C IC703 PCF8574P

ICP706 PCF8574P(Option)

IC701,702 TDA6920X

IC705 TC4052BP ICD02 MC14528B

ICD01,03 EL4583C

IC901 Z9037116PSC IC902 24C16 ICC01 Z86129

ICC02,03 NJM2248D

IC06 SDA9361 IC07 CXA2101AQ IC01 VPC3230D-B2 IC02 SDP9400

IC03 SDS9280 PIC01 VPC3230D-B2 PIC02 MS81V04160

*ICP701 SDA9488X

*IC04 CIP3250A

IC01 UPD64082GF

IC02 416C1204

1

2

3

4

5

6

*6-1

7

Block NameNo. IC Location IC Name

Table 2 - 3 IC Line - Up

Reference Information

Samsung Electronics 2-3

2-2 IC Line Up

2-2-1 Progressive

MAIN

SUB

A/V-Terminal

Micom

Caption

Double Window(D/W)

PIP

3D-Comb

Reference Information

2-4 Samsung Electronics

8

9

10

11

Block NameNo. IC Location IC Name

Table 2 - 3 IC Line - Up (Continued)

Convergence

Sound

CRT

POWER

IC111,112 CD40668BCM IC109,110 74HC4066

IC102 74HC4046

IC106,107,108 TL072

IC105 EL2210CS IC103 TSC87251G2D IC101 SDC91 IC104 AT82C64

ICD601 MSP3452G-A1

*ICD601 MSP3450G-B6

ICD602,603 TL062

IC501,531,561 TDA6111Q

IC801S STRF6656

IC802 SVD001(OPTION) IC804 SE11ON

Reference Information

Samsung Electronics 2-5

2-3 MICOM IIC BUS LINE -UP

Reference Information

2-6 Samsung Electronics

MENO

Specifications

Samsung Electronics 3-1

3. Specifications

Broadcasting System Scanning System

Tuning Range

Antenna Impedance

Intermediate Frequency

Sound Output

Rated Voltage

W/B Coordinates

High Voltage

FUSE

Power Consumption

NTSC Progressive Scanning VHF : CH2 ~ CH13 UHF : CH14 ~ CH69 Cable : CH1, CH14 ~ 125 75 ohm Unbalanced Video : 45.75 MHz Sound : 42.25 MHz Chrominance Subcarrier : 42.17 MHz STD : 10W FULL MAX : 15W 120V / 60 Hz Hx : 290 Hy : 278 Y : 8.0 Lx : 290 Ly : 278 Y : 0.2 29KV 250V/6.3A CODE NO : 3601-000300 230W

Specifications

3-2 Samsung Electronics

MENO

Alignment and Adjustments

Samsung Electronics 4-1

4. Alignment and Adjustments

4-1 When entering the service mode:

1. Turn on the TV, and then select “STANDARD”on the picture adjustment mode.

2. Turn off the TV (STAND-BY).

3. Enter the service mode by pressing the remote control keys in the following sequence : MUTE 1→8→2→Power On

Note : If necessary, re-do steps 1~3.

Initial display when the service mode is switched.

SERVICE MODE NORMAL

GEOMETRICS

PICTURE

SOUND

PIP

OPTION

READ

RESET

1. When a RF signal is received

SERVICE MODE 1080i/480P

GEOMETRICS

PICTURE

SOUND

PIP

OPTION

READ

RESET

2. When a DTV signal is received

MAIN MENU MENU DISPLAY

CH UP/DOWN Select item by moving cursor

VOL UP/DOWN Decrease or increase the adjustment values

3. Service Mode Control Keys

< PRECAUTIONS >

1. When EEPROM IC (IC902) is replaced, first connect the power cord and wait for about 4~5 seconds.

2. After replacing EEPROM IC (IC902), enter the Service mode. Next, enter the standard data or the previous EEPROM IC data before replacement. And then check and adjust any items related to Geometric, Picture, Option.

Alignment and Adjustments

4-2 Samsung Electronics

Item

Performance

of adjustment

EEP-ROM COPY DATA

VS

VA

VL

VSC

VE

HA

PPH

PAM

UPC

LOC

HEH

HS

VAN

VBO

HSP

OFS

VSO

VAO

VLO

V-Shift

V-Size

V-Line

V-S-CORR

V-EHT

H-Size

PIN-PHS

PIN-AMP

UP-CORR

LO-CORR

H-EHT

H-Shift

V-Angle

V-Bow

H-Sync-PH

Offset

VS-Offset

VA-Offset

VL-Offset

0~255

0~127

0~255

0~1

0~125

54”

GEOMETRIC

4-2 Factory Data

4-2-1 NORMAL

FUNCTION RANGE

INITIAL

DATA

Variable

x

Variable

x

Fix

x

Variable

110

120

128

0

84

128

70

128

0

90

128

138

0

57

70

0

100

120

128

0

80

128

70

128

0

90

128

138

0

57

70

0

Set after changing the option for 1080i-mode factory-scan (OFS 0->1) *Only DTV 1080i Mode

62”

100

120

128

0

80

128

70

128

0

90

128

138

0

85

95

0

55”

100

120

128

0

80

128

70

128

0

90

128

138

0

60

0

65”

100

120

128

0

80

128

70

128

0

90

128

138

0

60

0

Alignment and Adjustments

Samsung Electronics 4-3

PICTURE

Item

Performance

of adjustment

EEP-ROM COPY DATA

RDR

GDR

BDR

RCT

GCT

BCT

SBT

CON

COL

HUE

RYR

RYB

GYR

GYB

GAM

SHP

SFO

POV

LT I

VML

VMD

DCT

DPI

HPF

VPF

VPG

VPI

R-Drive

G-Drive

B-Drive

R-Cut Off

G-Cut Off

B-Cut Off

Sub-BRT

Sub-CONT

Sub-Color

Sub-Tint

R-Y AXIS

Gamma

Sub-Sharp

SHP-FO

PRE-OVER

LUMINANCE

VM-LBL

VM-PHASE

DC-TRAN

D-PIC

HPF/BCOF

VPF/HCOF

VAPGAIN

VAPINV

0~63

0~15

0~3

0~15

0~7

0~31

54”

FUNCTION RANGE

INITIAL

DATA

Variable

(Fix)

Variable

X

x

20

31

15

7

10

5

2

13

12

9

10

3

2

3

1

2

0

2

6

4

20

38

32

22

8

20

5

28

5

10/10/10

5

2

10

5

12

3

2/2/3

3/1/0

1

2/2/2

0/0/0

2/3/2

2/2/2

6

4

20

62”

38

32

22

8

20

5

28

5

10/10/10

5

2

10

5

12

3

2/2/3

3/1/0

1

2/2/2

0/0/0

2/3/2

2/2/2

6

4

20

55”

38

32

22

8

20

5

28

5

10/10/10

5

2

10

5

12

3

2/2/3

3/1/0

1

2/2/2

0/0/0

2/3/2

2/2/2

6

4

20

65”

38

32

22

8

20

5

28

5

10/10/10

5

2

10

5

12

3

2/2/3

3/1/0

1

2/2/2

0/0/0

2/3/2

2/2/2

6

4

20

Alignment and Adjustments

4-4 Samsung Electronics

PICTURE

Item

Performance

of adjustment

EEP-ROM COPY DATA

RCO

GCO

BCO

BPO

BWD

0~100

0~255

54”

FUNCTION RANGE

INITIAL

DATA

X

100

20

160

61

100

20

160

61

62” 55”

65”

100

65

20

160

61

100

20

160

61

100

20

160

61

Alignment and Adjustments

Samsung Electronics 4-5

4-2-2 D/TV 1080i

GEOMETRIC

Item

Performance

of adjustment

EEP-ROM COPY DATA

VS

VA

VL

VSC

VE

HA

PPH

PAM

UPC

LOC

HEH

HS

VAN

VBO

HSP

OFS

VSO

VAO

VLO

V-Shift

V-Size

V-Line

V-S-CORR

V-EHT

H-Size

PIN-PHS

PIN-AMP

UP-CORR

LO-CORR

H-EHT

H-Shift

V-Angle

V-Bow

H-Sync-PH

Off set

VS-Offset

VA-Offset

VL-Offse

0~255

0~127

0~255

0~1

0~255

0~25

54”

FUNCTION RANGE

INITIAL

DATA

Variable

X

Variable

X

x

Variable

210

50

128

0

75

128

70

128

0

68

128

138

0

57

70

0

130

80

120

128

0

90

128

70

128

0

68

128

138

0

57

70

0

62”

130

80

120

128

0

90

128

70

128

0

68

128

138

0

85

95

0

55”

130

80

120

128

0

90

128

70

128

0

68

128

138

0

60

0

65”

130

80

120

128

0

90

128

70

128

0

68

128

138

0

60

0

Set after changing the option for 1080i-mode factory-scan (OFS 0->1) *Only DTV 1080i Mode

Alignment and Adjustments

4-6 Samsung Electronics

GEOMETRIC

4-2-3 D/TV 480P

Item

Performance

for adjustment

EEP-ROM COPY DATA

VS

VA

VL

VSC

VE

HA

PPH

PAM

UPC

LOC

HEH

HS

VAN

VBO

HSP

OFS

VSO

VAO

VLO

V-Shift

V-Size

V-Line

V-S-CORR

V-EHT

H-Size

PIN-PHS

PIN-AMP

UP-CORR

LO-CORR

H-EHT

H-Shift

V-Angle

V-Bow

H-Sync-PH

Off set

VS-Offset

VA-Offset

VL-Offse

0~255

0~127

0~255

0~1

0~255

54”

FUNCTION RANGE

INITIAL

DATA

115

60

120

128

0

70

128

70

128

0

90

128

138

0

57

70

0

Variable

X

Variable

X

x

Fix

x

110

100

128

0

82

128

82

128

0

82

128

138

0

85

95

0

62”

110

100

128

0

82

128

82

128

0

82

128

138

0

60

0

55”

110

100

128

0

82

128

82

128

0

82

128

138

0

60

0

65”

Set after changing the option for 1080i-mode factory-scan (OFS 0->1) *Only DTV 1080i Mode

110

100

128

0

82

128

82

128

0

82

128

138

0

57

70

0

Alignment and Adjustments

Samsung Electronics 4-7

PIP

OPTION

Item

Performance

for adjustment

EEP-ROM COPY DATA

Byte 0

545R

FUNCTION

INITIAL

DATA

Option 00

Variable

6215R

5415R

08

68 68

Item

Performance

for adjustment

EEP-ROM COPY DATA

CONTRAST

HUE

POS-HOR-L

POS-HOR-R

POS-VER-U

POS-HOR-D

54”

FUNCTION

INITIAL

DATA

CONTRAST

HUE

POS-HOR-L

POS-HOR-R

POS-VER-U

POS-HOR-D

8

0

5

54

5

33

Variable

62”

55”

65”

8

0

2

60

21

22

8

0

2

60

21

22

8

0

2

60

21

22

8

0

2

60

21

22

Byte 1

Option 00

Variable

00

01 01

Item

Performance

for adjustment

EEP-ROM COPY DATA

Byte 0

552W

FUNCTION

INITIAL

DATA

Option 00

Variable

652W

5515W

89

E9 89

Byte 1

Option 00

Variable

00

01 00

6515W

E9

01

4715W

69

01

Alignment and Adjustments

4-8 Samsung Electronics

SZM-422A OPTION TABLE

Note 1

Option adjustments should be done in service mode.

Alignment and Adjustments

Samsung Electronics 4-9

4-3 Screen Change (When adjusting I2C Bus Geometric items)

1 V SHIFT

2 V LINEARITY

3 H SIZE

6 V SIZE

7 V - S - CORRECTION

8

PIN PHASE

4

PIN AMP

5 V ANGLE

9 H SHIFT

10 V BOW

Alignment and Adjustments

4-10 Samsung Electronics

4-4 Other Adjustments

4-4-1 Screen Adjustment

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

2. Turn to the Video Mode (No Signal) using a remote-control.

3. Connect an oscilloscope to RK,GK,BK.

4. Adjust the VR (VR501, VR531, VR561) screen so that RK, GK, BK pulse is 20Vp-p each. (Turn the R,G,B VR screen fully counterclockwise in the area of each flyback line.)

4-4-2 White Balance Adjustment

1. Select the “STANDARD” video mode.

2. Input 100% white pattern.

3. In the stand-by mode, press the remote-control keys in the following sequence: Mute → 1 → 8 → 2 → Power ON

4. Warm up the TV for at least 30 minutes.

5. Input a 10-step signal.

6. R-cut off, B-cut off, and G-cut off by pressing the Volume +/- keys.

7. Adjust the low light with viewing the dark side of the screen.

8. Select R-drive, G-drive, and B-drive by pressing the Volume +/- keys.

9. Adjust the high light with viewing the light side of the screen.

10. If necessary, redo adjustments 6~9.

11. Press the Menu key to exit.

4-4-3 Sub-Brightness Adjustment

1. Input a sub-brightness adjustment signal. (TOSHIBA PATTERN)

2. In the stand-by mode, press the remote-control keys in the following sequence : Mute - 1 - 8 - 2 - Power ON

3. Select SBT by pressing the Volume +/- keys.

4. Adjust so that the 63 step on the right side of the screen is not seen (Use the Volume +/keys).

5. Press the Menu key to exit.

4-4-4 High Voltage (29KV) Check

PRECAUTION

1. Input a lion head pattern.

2. Select “STANDARD” video mode.

3. Warm up the TV for at least 10 minutes.

4. Use a 1000:1 probe.

ADJUSTMENT

1. Connect the (+) terminal of the 1000:1 probe to the high voltage distributor and the (-) terminal to GND (located on the deflection board).

2. Adjust RR471S (located on the deflection board) so that the digital meter indicates DC 29KV ± 0.1KV.

4-4-5 F.S. (Fail Safe) Adjustment

Note : The finished product has a well-mounted

VR (RR402S). If necessary, do the F.S. adjustments in the following sequence.

1. Use a digital multimeter.

2. Connect the digital multimeter to the JIG pin (DZ482S) terminals

3. Adjust VR (RR402S) so that the voltage becomes 2.25V.

4. After the adjustments are complete, be sure to mount VR (RR402S) correctly.

Alignment and Adjustments

Samsung Electronics 4-11

4-4-6 F.S. (Fail Safe) Circuit Check

Note : The F.S. Circuit check must be performed

after servicing.

1. Turn on the TV.

2. Select the “STANDARD” video mode.

3. Short F/S Test point (located on the SUB PCB). Then, both sound and picture disappear. (Note: Even if the shorted terminals are removed, both sound and picture do not appear. This proves the F.S. circuit is working. )

4. To restore both sound and picture, turn off the TV and reset it after about 30 seconds.

4-4-7 Static Focus Adjustment

PRECAUTION

1. Select the “STANDARD” video mode.

2. Input a crosshatch pattern.

3. Cover the lenses that are not being adjusted.

4. Connect a convergence jig and read data.

5. Adjust the lens for best focus. (See Fig, 4-1, next page)

STATIC FOCUS (CONTINUED)

Vary the focus pack VR (Red, Blue) on the front cabinet. Adjust the TV for best possible focus around the center of the crosshatch pattern, without losing overall screen balance. Figure Crosshatch Pattern Examine these points together.

4-4-8 Lens Focus Adjustment

PRECAUTIONS

1. Do this adjustment after the static focus adjustment and the tilt adjustment.

2. Select the “STANDARD” video mode. (Contrast:100, Brightness:50)

3. Input a crosshatch pattern.

ADJUSTMENT

1. Loosen the lens screws.

2. Cover the two lenses that are not being adjusted.

3. Adjust the lens, observing the color aberration vertically and horizontally within 3 blocks of the center of the crosshatch pattern.

4. When the lens is turned clockwise, the color aberration will change as follows:

Lens Color Aberration Change R Orange - Crimson G Blue - Red B Purple - Green

5. Green lens adjustment: Set the lens at the point where Blue just changes to Red. If the color aberration is irregular throughout the picture screen, adjust the lens to show Red color aberration (approximately 1~3 mm area) within a 3-block grid around the horizontal center-line. If the color aberration is irregular, adjust the lens as shown in the diagram below. (Accurate alignment of Green is important for overall color quality.)

6. Red lens adjustment Set the Red lens at the point where Orange becomes Crimson.

7. Blue lens adjustment Set the Blue lens at the point where Purple becomes Green.

P

L1

L2

RED ABERRATION

BLUE ABERRATION

L1, L2 < P

_

Fig. 4-1 Crosshatch Pattern.

Fig. 4-2 Color Aberration

Examine these points together

Alignment and Adjustments

4-12 Samsung Electronics

4-4-9 Horizontal Dynamic Focus Adjustment

PRECAUTION

1. Input a crosshatch pattern.

2. Select the “STANDARD” video mode.

3. Warm up the set for at least 10 minutes.

ADJUSTMENT

1. Cover the Red and Blue lenses.

2. Use a digital multimeter.

3. Connect the '+' terminal of digital multimeter to D-Focus and the '-' terminal to GND.

4. Adjust L434 located on the sub PCB so that the digital multimeter indicates AC690V 20Vp-p.

5. Balance the left and right sides of the dynamic focus lines.

Alignment and Adjustments

Samsung Electronics 4-13

4-5 Hige Voltage Part

4-5-1 PWM REG Circuit

For the existing high voltage REG circuit (input voltage variation type), a dynamic REG response is not provided. So it is difficult for both beam linearity and uniformity in screen size to be maintained on the screen with rapidly changing beams.

A PWM (Pulse Width Modulation) type of high voltage, however, provides the maintenance of beam linearity and uniformity in screen size via a quick response to beam change by performing sync lock every 1H line, and detecting beam fluctuation at 1H line, and then controlling the IC current of high voltage output circuit.

1. High Voltage Fluctuation Detect (DC Detect)

FBT pin 11 detects DC high voltage fluctuation. The detected DC high voltage value is input to PWM IC471 pin1 through R473, VR471, R471, and then it is input to a differential AMP circuit that differentiates the gap after comparing with the reference voltage input to pin2.

2. High Voltage Fluctuation Detect (AC Detect)

To check AC high voltage fluctuation, the output from FBT is detected by using a capacitor inside the high voltage distributor. The detection of AC high voltage fluctuation, a detection of dynamic beam current change is required in order to keep beam linearity and uniformity in size. Regarding the capacitor, a capacity of less than 3000P should be applied to a PWM type. (The existing type needs a capacity of about 6000P.) AC detect circuit eliminates unnecessary high frequency by using C476, D472. Also, AC gain is limited to + / - 0.7V (D472). This AC gain is combined with the detection value of DC high voltage fluctuation by using C478.

3. PWM IC OSC Sync Lock

A PWM type IC needs sync lock for PWM pulse and horizontal scan line. The standard time constant of OSC circuit is determined by C487, R475 (PWM IC pins 5 and 6). And the standard OSC frequency is about 27 kHz . The horizontal frequency of scan line is

31.5kHz(NT), 3375kHz(DTV), 15.75kHz(Interface), so sync lock for this horizontal frequency should be performed using sync lock circuit. The sync lock circuit consists of Q481(Tr KSC815-Y), D479, D478, and C492. The input AFC signal is connected to PWM IC pin 5 through D479 so that it can be negative Trig.

4. Dead Time (HV Protect)

Dead Time (PWM IN pin4) consists of C481, delays high voltage for a certain time to soft start in power on, a x-ray protection circuit. The voltage of Dead Time is detected by FBT pin7 and through DC Feedback. The normal voltage of Dead Time is +27V. When high voltage increases, however, detected voltage is in proportion to high voltage. Then, the detected voltage is applied to ICR01S(TL431). If the voltage is over 2.5V (normal:about 2.25V), TL431 turns ON, the base port of QR401S becomes low, and then an emitter current flows. At this time, a high voltage protection point is set. When QR401S turns ON, high voltage is applied to PWM IC pin4 and then muted.

Alignment and Adjustments

4-14 Samsung Electronics

5. Output Circuit

The voltages, which are detected form an error detection circuit of PWM IC (Differential AMP) and Dead Time, each is applied to PWM conparator . Due to these detection coltages, Q1, Q2 (Output TR) parallel operate. Q482 (External TR), however, functions as a buffer; natches inpedance between the output port of PWM IC and the final output TR(IRFS640). The PWM pulse (applied to the final output FET (IRFS640 GATE) varies the IC current of high voltage TR(Q473) by adjusting the load impedance of starage Trans (T431). Due to this variation of current, the gain for Q473 emitter pulse changes T444(FBT)makes this emitter pulse became high voltage. Such change keeps both dynamic and static changes fixed. The output waveform of high valtage TR emitter is as shown in the figure below.

6. Paraneters according to beam

To maintain the set high voltage value (31kV), parmaters such as +Ve (DC), Vcp High Voltage change (See the table below).

7. Response Waveform

To reduce unstable high voltage fluctuation, the existing high voltage type REG circuit controls dynamic fluctuation by using C-block capacitor. But, it can't detect actual dynamic fluctuation. Also, its velocity of response to static fluctuation is late because +B power supply changes per

about 1V. A PWM modulation type REG detects static, dynamic high voltage fluctuation for only Ton Time (when the current of the output TR collector flows) each 1H, and modulates the width of PWM pulse. So, this PWM type has better improvement in the characteristic of high voltage REG as compared to the existing type.

8. Application Effects

1) Improvement of horizontal size fluctuation

2) Linearity improved

3) Embodiment of X-ray protection circuit

The figures below show characteristics when a PWM high voltage REG circuit is applied.

Beam

(High voltage )

Factor of high

voltage change

Beam

(High voltage )

Width of FET

Gate Pulse

+ Ve (DC)

Vcp

High

Voltage

Parameters

High Voltage Drive Base Current

PWM Input Waveform of FET GATE

GND

PWM Variation tange

Ton Toff

Beam

High Voltage

High Voltage OFF

High Voltage REG ON

BLACK

WHITE

When a Toshiba Pattern is recrived, the screen is displayed as shown in figute side

Existing type

PWM type

Alignment and Adjustments

Samsung Electronics 4-15

4-6 Screen-Jig

4-6-1 PCL545R/PCL5415R(NORMAL MODE)

4-6-2 PCL545R/PCL5415R(DTV MODE)

Alignment and Adjustments

4-16 Samsung Electronics

4-6-3 PCL6215R(NORMAL MODE)

4-6-4 PCL6215R(DTV MODE)