Samsung HPL63H1X Schematic

PLASMA DISPLAY TV

Chassis : D52A Model: HPL63H1X/XAA

PLASMA DISPLAY TV CONTENTS

Precautions

Reference Information

Specifications

Exploded View and Parts List

Alignment and Adjustments

Circuit Operation Description

Troubleshooting

Handling Description

Glossary

Schematic Diagrams

10.

ELECTRONICS

Printed in Korea

AA82-00355A

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 fornt cabinet and back cabinet, excessively wide cabinet

ventilation slots, and improperly fitted back

covers.

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 (ANSI C101.1, Leakage Current for Appliances), and Underwriters Laboratories (UL Publication UL1950.5.2).

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 3.5 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.

Precautions

Samsung Electronics 1-1

LEAKAGE CURRENT

TESTER

DEVICE UNDER

TEST

TEST ALL

EXPOSED METAL

SURFACES

3-WIRE CORD

ALSO TEST WITH PLUG REVERSED

(USING AC ADAPTER

PLUG AS REQUIRED)

EARTH

GROUND

(READING SHOULD

NOT BE ABOVE

3.5mA)

Follow these safety, servicing and ESD precautions to prevent damage and protect against potential hazards such as electrical shock and X-rays.

1-2 Safety Precautions (Continued)

7. 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.

8. 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.

9. 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.

10. 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.

11. 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.

12. 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.

13. 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.

14. 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.

15. Littum battery replace warning: Danger of explosion if battery is incorrectly replaced, Replace only with the same or eqivalent type.

Precautions

1-2 Samsung Electronics

“CAUTION, Double-pole/neutral fusing”

CAUTION

Danger of explosion if battery is incorrectly replaced.

Replace only with the same or equivalent type recommended by the manufacturer. Dispose of used batteries according to the manufacturer’s instructions.

1-3 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. 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.

7. 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.

8. Plasma display panels have partial afterimages when a same picture continues to be displayed for a certain time. This happens due to the degradation of brightness caused by a scale-down effect. To prevent such afterimages when displaying a same picture for a certain time, be sure to reduce the level of brightness and contrast. ex) Contrast : 50 or 75, Brightness : 25

9. Plasma display is an array of pixels(cells). Therefore, if at least 99.9% pixels keep normal, the appropriate panel is judged as ‘approved product.’ Even though some of pixels keep luminescent or always light off, do not worry because the panel is approved.

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.

1-4 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

CAUTION

These servicing instructions are for use by qualified service personnel only. To reduce the risk of electric shock do not perform any servicing other than that contained in the operating instructions unless you are qualified to do so.

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

Specifications

Samsung Electronics 3-1

3. Specifications

MODEL

SCREEN SIZE

3-1 Display(PDP Monitor)

Display

Remote Control

Display

Remote Control

Power Consumption

Voltage

RGB input

VIDEO input

Dimensions

(mm/inch)

Weight

HPL6315

1393(H) x 783(V)/54.86 x 30.84

1566(W) x 89(D) x 912.5(H) mm/61.65(W) x 3.5(D) x 35.93(H) Inches

54(W) x 31.5(D) x 220(H)mm/2.13(W) x 1.24(D) x 8.66(H) Inches

72Kg/158.73Ibs

150g(including batteries)/0.33Ibs

AC120V 60Hz

725W

RGB1 : MINI D-SUB 15P

RBG2 : BNC (R/G/B H(CS)/V)

VIDEO : ANALOG 0.714VPP/75 Ω(Terminated)

SYNC(H,V)

VIDEO : 1.0VPP/75 Ω (BNC)

S-VIDEO : Y -> 1.0VPP/75 Ω

C -> 0.28V

PP/75 Ω

COMPONENT (Y/Pb/Pr) : Y -> 1.0V

PP/75 Ω

Pb -> 0.7vPP/75 Ω

Pr -> 0.7VPP/75 Ω

3-2 Samsung Electronics

MEMO

Alignment and Adjustments

Samsung Electronics 5-1

5. Alignment and Adjustments

5-1 Service Mode

5-1-1 SERVICE MODE ENTRY METHOD (General Transmitter)

1. Turn off the power to make the SET STAND-BY mode.

2. In order to enter the Service Mode, select MUTE-1-8-2-POWER.

In case entry into SERVICE MODE is unsuccessful, repeat the procedures above.

5-1-2 Initial DISPLAY State in times of SERVICE MODE Switch overs

PW364

INITIAL DISPLAY

SDA92 80 VPC3230 SDA9400

1, PW

364

2, SD

A9280

3, V

PC3230

4, SD

A9400

5, C

XA2101

6, A

D9884

7, O

SD POSITION

8, O

PTION

9, R

ESET

10, A

GING

orizonta lSize

er tical Horizontal Ve r t i ca l

Pos

CTIT

HRESH

CTIT

RAWID

Y- D

ELAY

PF GA IN

PF GAIN

PF GA IN

ACOM

RIGHT YUV

ONT YUV

FCOMP

ChromaB

and

uma LPF

PLL Speed

uma Delay

3230 Bri

ght

3230 C

ontr ast

PF Y/ C

PF Chroma

HHPeak Fil

ter

PeakingG

ain

oaring off/ on

UT DELAY

TNRCLY

CLY

TNRCLC

CLY

OP MODE

Alignment and Adjustments

5-2 Samsung Electronics

5-1-3 Buttons Operations within SERVICE MODE

#Notice

The existing service data may be deleted after downloading a program. Be sure to make a backup copy of your data before downloading and then restore the data after completing the download.

Channel UP/DOWN

Volume UP/DOWN

Entire menu display Cursor move to select items Enable to increase and decrease the data of the selected items

Limit Level Sys tem D-Color R-DRIVE

-DRIVE

B R-Cutoff G-Cutoff

-Cut off

B ABL MODE ABL TH HSEPSEL CONT RAST BRI GHT CR OFFSET CB

OFFS ET1

CXA2101 AD9884

DRIVE SUB BRIGHT SUB CONT SUB COLOR SUB HUE SUB SHP R-Y/R R-Y/B GG-Y/R

-Y/B

ABL LEVEL

SHP FO PRE/OVER CTI LEVEL

LTI LEVEL DC - TRAN D-PIC

RED

Gain GREEN BLUE

OFFSET

RED GREEN BLUE GAIN DRIVE OFFSET DIRVE V CONTRAST V BRIGHT PHASE

CHANGE PUMP

Gain

OFFSET

OSD

POSITION

HORIZ VE RT

OP TION

1, BACK GR OUN D COLOR

SHIFT PIXEL

PIXEL SHIFT

FAN PROTECT

TEMP

6, 7, 8, BASE LANGUAGE

PROTECT

SHARPNESS

MIN SEC

Alignment and Adjustments

Samsung Electronics 5-3

5-1-4 White Balance Adjust Method

1. Press MUTE-1-8-2-POWER to enter the factory mode.

2. Enter AD9884

3. Adjust LOW coordinates as R, B OFFSET and HIGH coordinates as R, B GAIN.(GREEN is fixed.)

4. In AD9884, adjust brightness with V CONTRAST / V BRIGHT for VIDEO / DTV, and adjust with GAIN DRIVE / OFFSET DRIVE for PC.

1. VIDEO MODE (SPR-3100, input TOSHIBA PATTERN)

2. DTV MODE (SPR-3100, input TOSHIBA PATTERN)

dj ustme

Adjustme

Coor dinates

Value

Deviation

dj ustme

Adjustme

Coor dinates

Value

Deviation

-LIGHT

x:286 y

274

18.7(fL)

3 3 3

H-LIGHT

-LIGHT

x:278 y

272

:0.53(f L)

(f L)

5 5

0. 1

x:288 y

277

Y: 16.1

3 3 3

x:280 y

:277

0.71

5 5

0. 1

- W/B Adjustment SPEC (Suwom Factory Toshiba PATTERN)

Alignment and Adjustments

5-4 Samsung Electronics

2. PC MODE (VG828, input TOSHIBA PATTERN)

dj ustme

Adjustme

Coor dinates

Value

Deviation

H-LIGHT

-LIGHT

x:287 y:288 Y: 21.3(fL)

x:287 y:294

2.17

3 3 3

5 5

0. 1

Alignment and Adjustments

Samsung Electronics 5-5

5-1-5 SCALAR FACTORY DATA DEFAULT VALUES

Alignment and Adjustments

5-6 Samsung Electronics

Alignment and Adjustments

Samsung Electronics 5-7

5-8 Samsung Electronics

Alignment and Adjustments

HPL6315

VGA

Video signal Dot X Line

640 X 350

640 X 400

VGA

WVGA

720 X 400

640 X 480

848 X 480

Ve rtical

Frequency (Hz)

70.086

85.080

70.087

85.039

59.940

72.809

75.000

85.008

60.000

72.000

75.000

85.000

56.250

Horizontal

Frequency (kHz)

31.469

37.861

31.469

37.927

31.469

37.861

37.500

43.269

29.838

35.156

36.072

37.650

42.925

Ve rtical

polarity

N/P

Horizontal

polarity

N/P

SVGA

XGA

WXGA

SXGA

800 X 600

1024 X 768

1152 X 864

1280 X 768

1280 X 1024

60.317

72.188

75.000

85.061

60.004

70.069

75.029

84.997

75.000

60.020

75.025

37.879

48.077

46.875

53.674

48.363

56.476

60.023

68.677

67.500

47.700

60.150

63.981

79.976

Alignment and Adjustments

Samsung Electronics 5-9

5-2 Adjusting the Discharge Voltage Of the Main Unit While Replacing ASS'Y (Body Part)

Turning the variable resistor clockwise reduces voltage except VG, V9, and VR(6).

SMPS

OUT PUT Voltage(V)

1. V A

1. V FAN

3. SIGNAL

V5D

VFAN

VAMP

1. V SB

4. V 5A

11. V 12A

12. V 5D1

1. V 5D

3. V 5D

V5D1

VSET

VSCAN

1. V A

2. V A

1. V 5D

3. V G

5. V SCAN

7. V E

11. V S

12. V S

13. V S

1. V 5D

3. V G

5. V E

7. V SCAN

10. V S

11. V S

12. V S

VS 168

VE 183

VA 70

VSET 190

VSCAN 80

V5D 5

VFAN 12

VAMP 9

V5D1 5

V5A 5

V12A 12

VSB 5

V12A

V5A

VSB

1. V 5A

3. V 9A

4. V 12A

6. V AMP

7. V AMP

Alignment and Adjustments

5-10 Samsung Electronics

Alignment and Adjustments

5-3 Fault Finding Using MULTI METER

Parts defects can be found for DIODE TRANSISTOR IC, using MULTI TEST including Forward/Reverse direction Multi Test. Of course, in case resistance of several ohms and COIL are connected in parallel circuit, the lock out circuit parallel connected to part must be severed.

1.DIODE

2. TRANSISTOR

● For NPN(KSC815-Y, 2SC2068, 2SC2331-Y)

● For PNP(KSA539-Y)

Forward Direction

Hundreds of ohms

Reverse Direction

Infinity

Between Anode and Cathode

C (COLLECTOR)

B(BASE)

C (COLLECTOR)

B(BASE)

E (EMITTER)

Forward Direction Hundreds of ohms Hundreds of ohms

Infinity

Reverse Direction

Infinity Infinity Infinity

Between B and E

Between B and C

Between E and C

Forward Direction Hundreds of ohms Hundreds of ohms

Infinity

Reverse Direction

Infinity Infinity Infinity

Between B and E

Between B and C

Between E and C

+- +-

Alignment and Adjustments

Samsung Electronics 5-11

Alignment and Adjustments

3. IC (INTEGRATED CIRCUIT)

IC has built in DIODE against overvoltage in PIN. Generally, except for internal circuit defects, IC defects can be found, by measuring the DIODE.

✍ Defects have SHORT(0 ohm) for both forward and reverse direction.

Hundreds of ohms

Forward Direction

Reverse Direction

Varying depending on IC but generally normal

Infinity in DIODE TEST MODE

5-12 Samsung Electronics

MEMO

Circuit Operation Description

Samsung Electronics 6-1

6. Circuit Description

6-1 Power supply

6-1-1 Outline(PDP SMPS)

Considering various related conditions, the switching regulator with good efficiency and allowing for its small size and light weight was used as the power supply for PDP 50inch, VS requiring high power consumption used forward converter and 12VSAMP used the simple flyback converter and other high voltage (VSCAN,VSET,VE)used DC/DC converter. To comply with the international harmonics standards and improve the power factor, active PFC(Power Factor Correction) was used to rectify AC input into +400V DC output, which in turns used as input to the switching regulator.

6-1-2 63"HD SMPS Specification

(1) Input

The PDP-PS-421S board should be designed so that the AC power supply within the 100VAC (common) to 150VAC and the input frequency within 50/60Hz can be applied.

(2) Output

The PDP-PS-421S board converts the AC Voltages (+165Vs1, +75Va, +185Ve, +5Vd, +12Vcc, +6Vsp,

+9Vsp, +9Vcc, +12Vfan, +5Vd1, +5Va, +220Vset, +75Vscan, +18Vg) into the DC Voltages. The usage and specification of each output is as shown in Table 1. Table 1 shows the power supplies for PDP SMPS.

Table1. Specifications of Output Power Supplies for PDP SMPS

165Vs

75Va

185Ve

220Vset

75Vscan

5Vd

18Vg

5Vdl

5Va

9Vcc

12Vcc

6Vsp

12Vfan

5Vsb

165V ± 1%

75V ± 1%

185V ± 1%

220V ± 1%

75V ± 1%

5.2V ± 1%

18V ± 5%

5.2V ± 1%

9.2V ± 5%

12.2V ± 5%

6V ± 5%

11V ~ 14V

5.2V ± 1%

160V ~ 190V

60V ~ 85V

170V ~ 200V

200V ~ 250V

60V ~ 90V

4.5V ~ 5.5V

3V ~ 24V

5.0V ~ 5.4V

0.2

0.01

0.3

0.07

0.2

0.1

0.07

0.25

0.1

2.0

0.1

→

2.5

→

1.0

0.2

0.01

0.3

0.07

0.2

0.1

0.07

0.25

0.1

Output

Voltage

(V)

Voltage Setting

(Normal Load)

Output

Voltage

Variable Point

Output Current(A)

Min Non Max

Circuit Operation Description

6-2 Samsung Electronics

(3) FUNCTION OF BOARD

1) Remote control Using 120V/10A relay, the board makes remote control available.

2) Voltage The board designed so that input voltage can be used within 100 VAC to 150VAC.

3) Improvement of power factor The board is designed using PFC circuit so that PF (Power Factor) can be over 0.95, because low PF can be a problem in high voltage power.

4) Protection The OCP (Over Current Protection), the OVP (Over voltage Protection), and the Short Circuit Protection functions are added against system malfunction.

(4) BLOCK DIAGRAM

This product can be defined as a power supply device (Input power: AC110/220V), consists of

Inrush Current Limit Circuit on Input and Power Factor Correction circuits, VS, VA, and VI Block, providing the power (current) required for PDP Panel discharges and external circuits. PFC circuit utilizes Discontinuous Current Mode ( DCM) that produces a high efficiency. And, an input EMI filter circuit is equipped on the exterior.

1) PFC Block Boost Discontinuous Current Mode (DCM) PFC circuit is used for PFC (Power Factor Correction), where a common PWM IC gives an easy control, a simple circuit onfiguration, and a high efficiency. The circuit operates as described as following:RELAY is to be operated by inputting initial Relay “ON” while the resistance for Inrush Current Limit charges a capacitor of PFC Output Terminal. If the charged voltage of the capacitor goes over 340V, a comparator of PFC circuit controller activates VA Block and Relay for Inrush Current Limit. Thereafter, PFC circuit initiates a normal operation. PFC circuit has output, voltage, current limit circuits for placing a restriction on switching current, and protective (safeguard) circuits against output over-voltage. The over-voltage induces input Terminal Relay to be “OFF” with the set shut down.

2) Vs Block supplies the sustain power closely related to PDP Panel and includes 165Vs and 185Ve employing a Full-bridge circuit as Topology. In order to insulate gate signal, Driver at the secondary side based on properties of the pulse type of load. 185Ve power utilizes a variable Regulator for sub-output of 165Vs power, which is supplied to the load being added to 165Vs power. 70kHz is applied for switching frequency that has the Sequence operated after rising 5Vd power.

Table 2. Security function SPEC required for PDP SMPS

Division

+165Vs

+ 75Va

OCP Current

5 ~ 7A

3 ~ 4A

OVP Voltage

190 ~ 220V

85 ~ 100V

UVP Voltage

135 ~ 145V

50 ~ 65V

Short Circuit

Circuit Operation Description

Samsung Electronics 6-3

Vs Switching Pulse(Pulse for power board operation only)

Va Switching Pulse(Pulse for Set ON)

Circuit Operation Description

6-4 Samsung Electronics

3) Va Block Va Block consists of address voltage suppliers (75Va, 220Vset, and 75Vscan), VCCs that supply a power to logic circuit, and 12V fan; the power of cooling Fan of 18Vg. PDP Set that provides Gate voltages of drive circuit. It utilizes a Forward circuit mode as TOpology. 75Vscan uses 75Va power to construct not only stable but, if needed, also variable DC/DC Converter while 220Vset, also variable if wanted, is applied by adding 165Vs power to the power generated from Buck Converter with 75Va power. 5Vd and 12Vsp power can be generated by Buck Converter with the power gained through Coupling in Transformer, and 18Vg by Linear Regulator. The switching frequency is 70kHz.

Va Switching Pulse(Pulse for Set ON)

4) Block VI Block consists of voltage suppliers for image circuits (5Va, 9Vcc, 12Vcc, and 5Vd1), and a Flyback circuit mode is applied as Topology. Feedback for voltage stability is designed for 5Vd1, 5Va, 9Vcc, 12Vcc, and 5Vd1 powers anr generated by using each Linear Regulator for the power gained through Coupling in Transformer. The switching frequency is 100kHz.

Circuit Operation Description

Samsung Electronics 6-5

VI Switching Pulse(Pulse for power board operation only)

VI Switching Pulse(Pulse for Set ON)

Circuit Operation Description

6-6 Samsung Electronics

6-1-3 Pin Assignment

Image Board

NO OUT PUT

1 2 3

4 5 6

7 8 9

10 11 12

+5V

GND(D)

+5V

RELAY

THDET

FAN GND GND

N.C +12V

+5V

N.C

LOC

VSB

V5(D)

V12

V5(D)

SX(X Driver)

OUT PUT

1 +5V 2 3 4

6 7

9 10 11 12

GND +18V GND

70V

GND

230V N.C

GND GND 165V 165V

165V

LOC

V5(D)

VSCAN

VS VS

SY (Y Drive)

OUT PUT

1 +5V(D) 2 3 4

6 7

9 10 11 12

GND(D)

+18V

GND

200V

GND

70V GND GND

165V 165V

165V

LOC

V5(D)

VSCAN

VS VS VS

Speaker

NO OUT PUT

1 2

3 4 +12V V12

5 GND 6 VSAMP 7 VSAMP 8

+5V GND

+9V

+6V +6V

GND GND

LOC LOC

Buffer(2EA) SL(Logic)

NO OUT PUT

1 2 3 4

NO OUTPUT

1 +12V VFAN 2 GND

+70V +70V

GND GND

Fan(3EA)

VA VA

LOC

1 2

3 4

OUT PUT

+70V +70V

GND GND

LOC

Circuit Operation Description

Samsung Electronics 6-7

6-1-4 SMPS Block diagram

INPUT

PFC

BLOCK

Reg.

DC/DC

Reg.

BUCK

GND

185VE

165VS

220VET

75VSCAN

75VA

18VG

5VD

6VSP

12VFAN

INPUT

BLICK

Reg.

GND

5VD1

5VA

9VCC

12VCC

5VSB

Circuit Operation Description

6-8 Samsung Electronics

6-2 Driver circuit

6-2-1 Driver circuit overview

6-2-1(A) WHAT IS THE DRIVER CIRCUIT

It is a circuit generating an appropriate pulse (High voltage pulse) and then driving the panel to implement images in the external terminals (X electrode group, Y electrode group and address electrode), and this high voltage switching pulse is generated by a combination of MOSFETs.

6-2-1(B) PANEL DRIVING PRINCIPLES AND TYPES OF DISCHARGE BY DRIVE PULSE

In PDP, images are implemented by impressing voltage on the X electrode, Y electrode and address electrode, components of each pixel on the panel, under appropriate conditions. Currently, ADS (Address & Display Separate: Driving is made by separating address and sustaining sections) is most widely used to generate the drive pulse. Discharges conducted within PDP pixels using this method can largely be classified into 3 types, as follows:

Address discharge: This functions to generate wall voltage within pixels to be lighted by addressing information to them (i.e., impressing data voltage)

Sustaining discharge: This means a display section where only pixels with wall voltage by the address discharge display self-sustaining discharge by the support of such wall voltage. (Optic outputs realizing images are generated.)

Ramp reset discharge: To have address discharge occur selectively in pixels, all pixels in the panel must have the same conditions (i.e., the same state of wall and space electric discharges). The ramp reset discharge section, therefore, is important to secure the drive margin, and methods most widely used to date include wall voltage controlling by ramp pulse.

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