Samsung PS42P2SDXXEC Schematic

PLASMA DISPLAY TV

Chassis : D53A(P)

Model: PS42P2SDX/XEC

				PLASMA DIAPLAY TV												C O N T E N T S
													1.			Precautions
													2.			Reference Information
													3.			Specifications
													4.			Alignment and Adjustments
													5.			Circuit Operation Description
													6.			Troubleshooting
													7.			Exploded View and Parts List
													8.			Electric Parts List
													9.			Handling Description
													10.			Glossary
													11.			Wiring Diagram
													12.			Schematic Diagrams

Precautions

1. Precautions

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

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.

									(READING SHOULD
						LEAKAGE			NOT BE ABOVE
DEVICE						CURRENT				0.5mA)
UNDER						TESTER
TEST
		TEST ALL
	EXPOSED METAL
		SURFACES
2-WIRE CORD
ALSO TEST WITH
PLUG REVERSED
(USING AC ADAPTER											EARTH
PLUG AS REQUIRED)										GROUND

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.High Voltage Limits:

High voltage must be measured each time servicing is done on the B+, horizontal deflection

or high voltage circuits.

Samsung Electronics

1-1

Precautions

1-2 Safety Precautions (Continued)

8.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.

9.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.

10.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.

11.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.

12.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.

13.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.

14.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.

15.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.

1-2	Samsung Electronics

Precautions

1-3 Servicing Precautions

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.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.

Samsung Electronics

1-3

Precautions

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.

1-4	Samsung Electronics

Reference Information

2. Reference Information

2-1 Tables of Abbreviations and Acronyms

Table 2-1 Abbreviations

A	Ampere	MV	Megavolt
Ah	Ampere-hour	MW	Megawatt
Å	Angstrom	MΩ	Megohm
dB	Decibel	m	Meter
dBm	Decibel Referenced to One	µA	Microampere
°C	Milliwatt	µF	Microfarad
	Degree Celsius	µH	Microhenry
°F	Degree Fahrenheit	µm	Micrometer
°K	degree Kelvin	µs	Microsecond
F	Farad	µW	Microwatt
G	Gauss	mA	Milliampere
GHz	Gigahertz	mg	Milligram
g	Gram	mH	Millihenry
H	Henry	mI	Milliliter
Hz	Hertz	mm	Millimeter
h	Hour	ms	Millisecond
ips	Inches Per Second	mV	Millivolt
kWh	Kilowatt-hour	nF	Nanofarad
kg	Kilogram	Ω	Ohm
kHz	Kilohertz	pF	Picofarad
kΩ	Kilohm	Ib	Pound
km	Kilometer	rpm	Revolutions Per Minute
km/h	Kilometer Per Hour	rps	Revolutions Per Second
kV	Kilovolt	s	Second (Time)
kVA	Kilovolt-ampere	V	Volt
kW	Kilowatt	VA	Volt-ampere
I	Liter	W	Watt
MHz	Megahertz	Wh	Watt-hour

Samsung Electronics

2-1

Reference Information

Table 2-2 Table of Acronyms

ABL	Automatic Brightness Limiter	I/O	Input/output
AC	Alternating Current	L	Left
ACC	Automatic Chroma Control	L	Low
AF	Audio Frequency	LED	Light Emitting Diode
AFC	Automatic Frequency Control	LF	Low Frequency
AFT	Automatic Fine Tuning	MOSFET	Metal-Oxide-Semiconductor-Field-Effect-Tr
AGC	Automatic Gain Control	MTS	Multi-channel Television Sound
AM	Amplitude Modulation	NAB	National Association of Broadcasters
ANSI	American National Standards Institute	NEC	National Electric Code
APC	Automatic Phase Control	NTSC	National Television Systems Committee
APC	Automatic Picture Control	OSD	On Screen Display
A/V	Audio-Video	PCB	Printed Circuit Board
AVC	Automatic Volume Control	PLL	Phase-Locked Loop
BAL	Balance	PWM	Pulse Width Modulation
BPF	Bandpass Filter	QIF	Quadrature Intermediate Frequency
B-Y	Blue-Y	R	Right
CATV	Community Antenna Television (Cable TV)	RC	Resistor & Capacitor
CB	Citizens Band	RF	Radio Frequency
CCD	Charge Coupled Device	R-Y	Red-Y
CCTV	Closed Circuit Television	SAP	Second Audio Program
Ch	Channel	SAW	Surface Acoustic Wave(Filter)
CRT	Cathode Ray Tube	SIF	Sound Intermediate Frequency
CW	Continuous Wave	SMPS	Switching Mode Power Supply
DC	Direct Current	S/N	Signal/Noise
DVM	Digital Volt Meter	SW	Switch
EIA	Electronics Industries Association	TP	Test Point
ESD	Electrostatic Discharge	TTL	Transistor Transistor Logic
ESD	Electrostatically Sensitive Device	TV	Television
FBP	Feedback Pulse	UHF	Ultra High Frequency
FBT	Flyback Transformer	UL	Underwriters Laboratories
FF	Flip-Flop	UV	Ultraviolet
FM	Frequency Modulation	VCD	Variable-Capacitance Diode
FS	Fail Safe	VCO	Voltage Controlled Oscillator
GND	Ground	VCXO	Voltage Controlled Crystal Oscillator
G-Y	Green-Y	VHF	Very High Frequency
H	High	VIF	Video Intermediate Frequency
HF	High-Frequency	VR	Variable Resistor
HI-FI	High Fidelity	VTR	Video Tape Recorder
IC	Inductance-Capacitance	VTVM	Vacuum Tube Voltmeter
IC	Integrated Circuit	TR	Transistor
IF	Intermediate Frequency

2-2	Samsung Electronics

Specifications

3. Specifications

3-1 Display(PDP Monitor)

		MODEL	PS-42P2S
SCREEN SIZE			16:9
Dimensions		Display	1039(W) x 89(D) x 635(H)/40.9(W) x 3.5(D) x 25(H)
(mm/inch)		Remote Control	54(W) x 31.5(D) x 220(H)/2.13(W) x 1.24(D) x 8.66(H)
Terminal		Display	32Kg/70.54\bs
		Remote Control	150g/0.33\bs
		Front	POWER , MUTE, -VOLME+, ▲SELECT▼, MENU,SOURCE
In/Out			AV1(S-VHS IN, VIDEO IN)
			AV2(SCART IN)
Terminals		Back	PC IN
			AUDIO IN(AV1, PC)
			RS232C(only for service)
			External Speaker Out
	Power Supply		AC220V 50/60Hz
Power Consumption			350W
	Screen Size		852 x 474(106 cm)/33.54 x 18.66(42inchs)
Adjustment System			Electronic Function Adjustment

Samsung Electronics

3-1

MENO

3-2	Samsung Electronics

Alignment and Adjustments

4. Alignment and Adjustments

4-1 Service Mode

4-1-1 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.

4-1-2 Initial DISPLAY State in times of SERVICE MODE Switch overs

4-1-2(A)		OSD DISPLAY
	1.	PWS364A	9. PinP Control
	2.	VPC3230	10.	OSD Position
	3.	SDA9400	11.	Test Position
	4.	SDA9280	12.	Option Table
	5.	AD9884-Video	13.	Reset
	6.	AD9884-DTV/PC
	7.	CXA2101Q-1
	8.	CXA2101Q-2
	Release Time :

4-1-2(B) BUTTONS OPERATIONS WITHIN SERVICE MODE

Menu	Entire menu display
Joystick UP/DOWN	Cursor move to select items
Joystick	Enable to increase and decrease the data of the selected items

#Notice

1.In case of no signal in ALL MODE. entry into the FACTORY MODE cannot be made.

Samsung Electronics

4-1

Alignment and Adjustments

4-1-3 Details of Control

4-1-3(A) PW364A

No	OSD	Item		Range		Default	Description
1	H Position	H Position	0	~ 127		30	H-Position(The Picture moves left when the value increase)
2	V Position	V Position	0	~	84	34	V-Position(The Picture moves up when the value increase)
3	Red Gain	Red Gain	0	~ 255		116	High Light Adjustment(Variable)
4	Green Gain	Green Gain	0	~ 255		116	High Light Adjustment(Variable)
5	Blue Gain	Blue Gain	0	~ 255		116	High Light Adjustment(Fixed)
6	Red offset	Red Cutoff	0	~ 255		128	Low Light Adjustment(Variable)
7	Green offset	Green Cutoff	0	~ 255		128	Low Light Adjustment(Variable)
8	Blue offset	Blue Cutoff	0	~ 255		128	Low Light Adjustment(Fixed)
9	APL on/off	APL on/off	0, 1			1	Fixed, Shipment Setting : APL On
10	High Light	High Light	0	~ 255		116
11	Low Light	Low Light	0	~ 255		128
12	Shift Pixel	Shift Pixel	off, on			Off
13	Test	Test	0,1			0
14	Pixel Number	Pixel Number	0	~	5	4
15	Shift Line	Shift Live	0	~	5	4
16	Time	Time	0	~	60	4

4-1-3(B) VPC3230

No	OSD	Item		Range		Default	Description
1	Bright YUV	Brightness of YUV	0	~ 255		195	Comp, (DVD) Bright, Level (Fixed)
2	Cont YUV	Contrast of YUV	0	~	63	27	Comp, (DVD) Cont, Level (Fixed)
3	IF Comp	IF Compensation	0	~	3	2	Air IF Frequency Characteristic Setting (Fixed)
4	Chroma band	Chroma band width	0	~	4	3	Chroma Band Setting (Fixed)
5	Ena Luma	Enable Luma, LPF	0	~	1	1	Determines whether LPF is used or not (Fixed)
6	HPLL Speed	HPLL Speed	0	~	3	1	VCR/Air Sync, Response Velocity Setting
7	Luma Delay	Luma/Chroma Delay	0	~	9	5	Y/C Delay
8	3230 Bright	Brightness	0	~ 255		168
9	3230 Contrast	Contrast	0	~	63	36
10	H LPF Y/C	H LPF for Y/C	0	~	4	0	By pass, f1, f2, f3
11	H LPF Chroma	H LPF Chroma	0	~	2	0
12	H Peaking	H Peaking Filter	0	~	3	2	Board, Med, Narrow
13	Coaring Off/On	Coaring Off/On	0, 1			1	Coaring off, on

4-2	Samsung Electronics

Alignment and Adjustments

4-1-3(C) SDP9400

No	OSD	Item		Range		Default	Description
1	SNR On	SNR On		0, 1		1	Spatial Noise Reduction
2	VCSNR On	VCSNR On		0, 1		1	Vertical Spatial Noise Reduction
3	HCSNR On	HCSNR On		0, 1		0	Horiz, Spatial Noise Reduction
4	DTNR On	DTNR On		0, 1		1	Frame/Field Selection
5	TNRCLY	TNRCLY	0	~	15	5
6	TNRCNC	TNRCNC	0	~	15	5

4-1-3(D) SDA9280

No	OSD	Item		Range		Default	Description
1	CTI Thresh	CTI Thresh	0	~	15	0
2	CTI Trawid	CTI Trawid	0	~	15	0
3	Y-Delay	Y-Delay	0	~	15	11
4	LPF Gain	LPF Gain	0	~	7	4
5	BPF Gain	BPF Gain	0	~	15	8
6	HPF Gain	HPF Gain	0	~	15	8
7	Phacom	Phacom	0	~	3	0
8	Cor	Cor		0, 1		1

4-1-3(E) AD9884-VIDEO

No	OSD	Item		Range		Default	Description
1	Red Gain	Red Gain	0	~ 255		137	PC Mode W/B (Fixed)
2	Green Gain	Green Gain	0	~ 255		128	PC Mode W/B (Fixed)
3	Blue Gain	Blue Gain	0	~ 255		141	PC Mode W/B (Fixed)
4	Red Offset	Red Offset	0	~	63	27	PC Mode W/B (Fixed)
5	Green Offset	Green Offset	0	~	63	32	PC Mode W/B (Fixed)
6	Blue Offset	Blue Offset	0	~	63	36	PC Mode W/B (Fixed)

Samsung Electronics

4-3

Alignment and Adjustments

4-1-3(F) AD9884 DTV/PC

No	OSD	Item		Range		Default	Description
1	Red Gain	Red Gain	0	~ 255		125	PC Mode W/B (Fixed)
2	Green Gain	Green Gain	0	~ 255		128	PC Mode W/B (Fixed)
3	Blue Gain	Blue Gain	0	~ 255		127	PC Mode W/B (Fixed)
4	Red Offset	Red Offset	0	~	63	40	PC Mode W/B (Fixed)
5	Green Offset	Green Offset	0	~	63	32	PC Mode W/B (Fixed)
6	Blue Offset	Blue Offset	0	~	63	39	PC Mode W/B (Fixed)

4-1-3(G) CXA2101Q-1

No	OSD	Item		Range		Default	Description
1	Sub Bright	Sub Bright	0	~	63	51
2	Limit Level	Limit Level	0	~	3	0	Limits the input level (Fixed)
3	System	System	0	~	3	1	480p, 720p, 1080i
4	D-Color	D-Color	0	~	2	1	Dynamic Color
5	R Drive	R Drive	0	~	63	32	DTV W/B (Fixed)
6	G Drive	G Drive	0	~	63	32	DTV W/B (Fixed)
7	B Drive	B Drive	0	~	63	32	DTV W/B (Fixed)
8	R CutOff	R CutOff	0	~	63	32	DTV W/B (Fixed)
9	G CutOff	G CutOff	0	~	63	32	DTV W/B (Fixed)
10	B CutOff	B CutOff	0	~	63	32	DTV W/B (Fixed)
11	ABL Mode	ABL Mode	0	~	3	0	ABL Mode Setting
12	ABL TH	ABL-TH	0	~	3	0	Voltage
13	H Sep Sel.	H Sep Sel.		0, 1		0	H-Sync, Seperation System
14	Fix Sync.	Fix Sync.	0	~	3	0	0 : Auto
15	V Time Con	V Time Constant	0	~	3	1	Set the time constant for V-Sync Seperation
16	H Width	H Width	0	~	3	1	H-Sync Width Adjustment
17	HHD timi Con	H timi Constant		0, 1		0

4-4	Samsung Electronics

Alignment and Adjustments

4-1-3(H) CXA2101QQ-2

No	OSD	Item		Range		Default	Description
1	HS Mask	HS Mask		0, 1		1
2	Sub Cont	Sub Contrast	0	~	15	7
3	Sub Color	Sub Color	0	~	15	5
4	Sub Hue	Sub Hue	0	~	15	8
5	Sub SHP	Sub SHP	0	~	4	2
6	R-Y/R	R-Y/R	0	~	15	13	13 (PAL), 5(NT)
7	R-Y/B	R-Y/B	0	~	15	15
8	G-Y/R	G-Y/R	0	~	15	8
9	G-Y/B	G-Y/B	0	~	15	4	4 (PAL), 8 (NT)
10	PABL Level	PABL Level	0	~	15	8	Peak ABL
11	SHP FO	SHP FO	0	~	4	2	Sharpness FO Selection
12	Pre/over	Pre/over	0	~	3	3	0=Pre. : Over=1:1.3 3=3:1
13	CTI Level	CTI Level	0	~	3	1	C Transition Level
14	LTI Level	LTI Level	0	~	3	0	Y Transition Level
15	DC-Tran	DC-Tran	0	~	3	1	Y DC Transmission Rate
16	D-Pic	D-Pic	0	~	3	1	Dynamic Picture

4-1-3(I) PINP CONTROL

No		OSD		Item		Range		Default	Description
1	PIP HPos		PIP HPos		0	~	63	6	PinP Horizontal Position
2	PIP VPos		PIP VPos		0	~	63	13	PinP Vertical Position
3	Bright YUV		Bright YUV		0	~ 255		195	Comp. Bright. Level (Fixed)
4	Cont YUV		Cont YUV		0	~	63	27	Comp. Bright. Level (Fixed)
5	Luma Delay		Luma Delay			0		0	Y/C Delay
6	3230	Bright	3230	Bright	0	~	63	40
7	3230	Contrast	3230	Contrast	0	~	63	38

Samsung Electronics

4-5

Alignment and Adjustments

4-1-3(J) OSD POSITION

No	OSD	Item		Range	Default		Description
1	Horiz	Horiz(Left, Right)	8	~ 104	104	Move 8 by 8	(Total : 12 Step), Fixed
2	Vert	Vert(Up, Down)	8	~ 40	40	Move 8 by 8	(Total : 4 Step), Fixed

4-1-3(K) TEST PATTERN

No	OSD		Range		Default	Description
1	Pseudo Color Bar	0	~	15	-
2	Luma Ramp	0	~	15	-
3	White 16	0	~	15	-
4	White 90	0	~	7	-
5	White 240	0	~	15	-
6	Red	0	~	15	-
7	Green	0	~	3	-
8	Blue		0, 1		-

4-1-3(L) OPTION TABLE

No	ITEM	Default	Description
1	Rear Jack	Scart	Scart <--> RCA
2	Blue Screen	30	0 → 5 → 10 → 15 → 20 → 25 → 30 → 0
3	Picture Size-Aspect	Last Memory	Wide <--> Last Memory
4	Frame Lock	On	On <--> Off
5	Remocon Pin	01	00 ~ 99
6	Pivot	On	On <--> Off
7	Panel Life Time	-	Indicate total elapsed time

4-6	Samsung Electronics

Alignment and Adjustments

4-1-4 White Balance Adjust Method

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

2.Enter PW364A.

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

4.Adjust LOW light as Center Offset.

5.Adjust HIGH light as Gain Max.

6.Adjust fine as B-Offset and B-Gain.

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

VIDEO MODE

	Adjustment	Coordinates	Adjustment
	Coordinates	Value	Deviation
		x : 282	± : 3
	H-LIGHT	y : 296	± : 3
		Y : 24.5[f\]	± : 1
		x : 282	± : 5
	L-LIGHT	y : 296	± : 5
		Y : 0.95[f\]	± : 0.1
PC MODE
	Adjustment	Coordinates	Adjustment
	Coordinates	Value	Deviation
		x : 282	± : 3
	H-LIGHT	y : 296	± : 3
		Y : 15[f\]	± : 1
		x : 282	± : 5
	L-LIGHT	y : 296	± : 5
		Y : 0.33[f\]	± : 0.05

Samsung Electronics

4-7

8-4

Electronics Samsung

															PCSPK4215M	Adjustmentsand Alignment
NO	HRes	VRes	HFreqSes	VTotal	H_P	V_P	Dot_c	HS1Period	HFreqSec	fO(Hz)	CLOCK/	Factory	USER
											PHASE	HP/VP/P	V-Position
1	720	400	31.777	449	0	1	28.232	31.777u/10.1n=3146.2	/99=31.777	70.1	125/22/0/0	125/22/0/0
2	640	350	31.777	449	1	0	25.175	31.777u/10.1n=3146.2	/99=31.777	70.0	125/16/0/0	125/16/0/0
3	640	480	23.111	509	0	0	36.0	=2288.21	=23.111	85	125/8/0/1	125/8/0/1
4	640	480	26.667	500	0	0	31.5	=2640.29	=26.666	75	124/31/0/0	124/31/0/0
5	640	480	26.413	520	0	0	31.5	=2615.14	=26.414	72.8	125/31/0/0	125/31/0/0
6	640	480	31.777	525	0	0	25.175	=3146.23	=31.777	59.9	125/2/0/0	125/2/0/0
7	800	600	18.631	631	1	1	56.25	=1844.65	=18.626	85.1	125/9/1/2	125/9/1/2
8	800	600	21.333	625	1	1	49.5	=2112.17	=21.333	75	125/0/0/1	125/0/0/1
9	800	600	20.800	666	1	1	50.0	=2059.4	=20.797	72.2	125/31/0/2	125/31/0/2
10	800	600	26.400	628	1	1	40.0	=2613.86	=26.393	60.3	125/15/0/1	125/15/0/1
11	800	600	28.444	625			36.0	=2816.23	=28.444	56.3	126/1/0/1	126/1/0/1
12	1024	768	14.561	808	1	1	94.5	=1441.68	=14.555	85	126/14/2/3	126/14/2/3
13	1024	768	16.660	800	1	1	78.75	=1649.50	=16.656	75	125/20/1/3	125/20/1/3
14	1024	768	17.707	806	0	0	75.000	=1753.16	=17.707	70.1	125/21/1/3	125/21/1/3
15	1024	768	20.677	806	0	0	65.000	=2047.22	=20.676	60	125/16/1/2	125/16/1/2

Alignment and Adjustments

4-3 Discharge Voltage Adjustment Method (Monitor) in Times of ASS’Y Repair and Replacement

-All VR (Variable Resistor), except for VR for Vs, voltage goes down when turned counterclockwise.

● Vsc and Vy Adjustment Method

Y- Main

● Vs and Va Adjustment Method

■Vsc is the voltage of the left terminal for D5207

■Voltage adjustment is made for Vsc by using VR5201

■Standard voltage for Vsc is –55V±10V

■Vy is the voltage of the right terminal for D5207

■Voltage adjustment is made for Vy by using VR5200

■Standard voltage for Vy is 132V±10V

■Vs is the voltage of the no.11 PIN of SX Connector.

■Voltage adjustment is made for Vs by using VR in 7

■Vs is 175±5V

■Va is the voltage of the no.7 PIN of SX Connector.

■Voltage adjustment is made for Va by using right VR in 6

■Va is 75±5V

Samsung Electronics

4-9

Alignment and Adjustments

● Vw Adjustment Method

■ Vw is the voltage of the right terminal

for R4414

■ Voltage adjustment is made for Vw by

using VR4400

■ Standard voltage for Vw is 175V±5V

4-10	Samsung Electronics

Alignment and Adjustments

4-4 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

+

-

+

-

	Forward Direction	Reverse Direction
Between Anode and Cathode	Hundreds of ohms	Infinity

2.TRANSISTOR

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

			C (COLLECTOR)
B(BASE)
			E (EMITTER)	E			B			C
			Forward Direction	Reverse Direction
Between B and E			Hundreds of ohms				Infinity
Between B and C			Hundreds of ohms				Infinity
Between E and C			Infinity				Infinity
● For PNP(KSA539-Y)
			C (COLLECTOR)
B(BASE)
			E (EMITTER)	E			B			C
			Forward Direction	Reverse Direction
Between B and E			Hundreds of ohms				Infinity
Between B and C			Hundreds of ohms				Infinity
Between E and C			Infinity				Infinity

Samsung Electronics

4-11

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.

	Forward Direction	Hundreds of ohms
	Reverse Direction	Varying depending on IC but generally normal
		Infinity in DIODE TEST MODE

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

4-12	Samsung Electronics

Circuit Operation Description

5. Circuit Description

5-1 Power supply

5-1-1 Outline(PDP SMPS)

Considering various related conditions, the switching regulator with good efficiency and allowing for its small size and lightweight was used as the power supply for PDP. Most of the power supply components used forward converter, and Vsamp and Vsb used simple flyback 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.

5-1-2 42"SD SMPS SPECIFICATION

5-1-2(A) INPUT

PDP-42PS board is designed so that input power can be used within AC 90 VAC to 264 VAC with 50/60Hz ± 3Hz.

5-1-2(B) OUTPUT

PDP-42PS board provides 13 output switching power supplies for PDP 50inch (+165Vs, +220Set, +185Ve, +75Va, +80Scan, +18Vg, +5Vsb, +5V(D), +5V(A), +12V. +9V, +12Vfan, and +12Vsamp). The output voltage, and current requirements for continuous operation are stated below (Table 3).

Table1. Specifications of Output Power Supplies for PDP SMPS

Output Name	Output Voltage	Output Current	Using in PDP driving
Vs	+165V	1.4A	Sustain Voltage of Drive Board
Va	+75V	0.5A	Address Voltage of Drive Board
Vscan	+80V	0.05A
Vset	+220V	0.05A
Ve	+185V	0.05A
Vg	+18.3V	0.3A
Vfan	+12V	0.8A
V9	+9V	0.3A
V5(A)	+5V	1.0A	Analog IC Drive Voltage of Video Board
V5(D)	+5.3V	3.5A	IC Drive Voltage of Logic Board
Vsb	+5V	0.4	Stand-by for Remote Control
V12	+12V	1.2A
Vsamp	+12V	1.5A

Samsung Electronics

5-1

Circuit Operation Description

Table 2. Specifications to Protect PDP SMPS

Division	OCP Current	OVP Voltage	Short Circuit
Vs	5A	195V	O.K
Va	2A	90V	O.K
+5V	10A	6.2V	O.K

5-1-2(C) FUNCTION OF BOARD

(1)Remote control

Using 250V/ 10A relay, the board makes remote control available.

(2)Free voltage

The board designed so that input voltage can be used within 90 VAC to 264VAC.

(3)Embedded thermal sensor

The board is equipped with thermal sensor to detect the internal temperature of the unit, and to short relay when the internal temperature is higher than specified temperature so as to shutdown the unit.

(4)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.

(5)Protection

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

5-2	Samsung Electronics

Circuit Operation Description

5-1-2(D) PDP-PS-42 BLOCK DIAGRAM

Samsung Electronics

5-3

Circuit Operation Description

(1)AC-DC Converter

PDP-42PS outputs +400V DC from the common AC power supply using the active PFC booster converter. This converter is designed for improving the power factor and preventing the noise with high frequency and finally becomes the input power system for the switching regulator on the output side.

(2)Auxiliary Power Supply

The auxiliary power supply is a block generating power of •Ï-com for remote controlling. Once the power plug is inserted, this block always comes into operation, causing •Ï-com to get into the standby state for the output. Thus, this output is called the stand-by voltage. And with the relay ON signal inputted through the remote controller, this block turns the mechanical switch of relay to ON for driving the main power supply.

(3)Implementation of Sustain Voltage

As the main part of a SMPS for PDP, sustain voltage must supply a high power, +165V/ 1.4A. It is designed using forward converter basically. At the output stage two 90V converters are connected serially for high efficiency and reduction of system size against a single 180V converter.

(4)Implementation of Small Power Output (Va, V(D), V(A), Vfan, V9, Vsamp, Ve, Vset, Vscan, V12, and Vg)Vset, Ve, and Vscan used DC-DC module. V(D), Va, V12, and Vfan used forward converter, and Vsamp used flyback converter. V(A), V9, and Vg are simply implemented using switching regulator.

5-1-3 Requirements of PDP SMPS

Since SMPS does not operate alone, but it operates with the load of the whole system, it should be designed carefully considering the load of the system. In addition, it should be designed considering emerging issues such as EMC, and protection against heat as well as system stability especially.

5-1-3(A) SAFETY AND REMOTE CONTROL CAPABILITY

Stability is one of the most important requirements for SMPS. SMPS should be designed to prevent abnormal status due to abnormal load variation so as to keep the system stable, and guarantee customer safety.

The protection circuits of SMPS include over-current protection (OCP), over voltage protection (OVP), and under voltage lock-out (UVLO), and short circuit protection circuit. Although each circuit can be implemented by various procedures, the most popular is implementing with comparator that compares current value with that of standard and determine abnormality of the circuit.

In addition, surge current protection, insulation management, and static electricity protection circuit should be added, because it uses commercial power source as an input.

PDP SMPS should be designed using auxiliary power and relay to provide remote control capability.

5-4	Samsung Electronics

Circuit Operation Description

5-1-3(B) THE RELATION BETWEEN POWER CONSUMPTION AND POWER CONVERSION Efficiency

The power consumption and the power conversion efficiency of SMPS affect protection against heat and system operation much.

[ If the power conversion efficiency of 100W SMPS is 70%, is the power loss of internal circuit 30W? ] Output power consumption Po is determined by the multiplication of DC output voltage Vo and output current Io. Input power consumption Pi is determined by the addition of output power consumption Po and internal power loss of SMPS Pl.

Provided that the power conversion efficiency is _,

If the power conversion efficiency of 100W SMPS is 70%, the internal power loss is about 42.8W by Equation (1). If the power conversion efficiency of 400W SMPS for 42"SD is 82%, the internal power loss is 87.8W by Equation (1). Table 4 shows internal power loss as a function of output power for various power conversion efficiencies.

	200							η=50%
	180
														η=60%
	160
	140
																η=70%
	120
Internal
Power	100
Loss ( W)
	80
																η= 80%
	60
	40
																η=90%
	20
	0
	120			140		160		180	200		220		240		260		280		300

Direct Current Output Power (W)

Table 4. Power Conversion Efficiency vs. Internal Power Loss

Samsung Electronics

5-5

Circuit Operation Description

5-1-3(C) PFC (Power Factor Correction) Circuit Descriptions

The current electric devices use DC power supply and require a rectifier circuit converting AC into DC. As most rectifier circuits apply a capacitor input type, the rectifier circuit becomes the core of the occurrence of harmonics with lower reverse rate.If various electronic and electric devices are connected to a power system, high-frequency current will occur due to a power rectifier circuit, a phase control circuit with power input current of non-sine wave, or components with non-linear load characteristics, such as capacitor, inductor, etc. As the result, the disturbance of voltage occurs, and finally a power capacitor or a transformer generates heat, fire or noise occurs, controls malfunction, or the accessed devices abnormally operate or their lives are shortened.To prevent those symptoms, IEC (International Electrotechnical Commission) regulated standards for Power Supply Harmonics.

(Refer to IEC 1000-3-2.)Figure 8 shows the basic structure of Active Boost PFC and waveforms.

Standards for Power Supply Harmonics

Scale: Devices accessed to 220V/380V, 230V/400V, 240V/425V and lower than 16A (IEC 100-3-2) Devices with AC 230V and lower than 16A (IEC 555-2)

Applied Classes :

♣Class A : Devices not included in another class

♣Class B : Portable tools

♣Class C : Lighting devices

♣Class D : Devices with special current waveforms

Application Schedule : Except the devices less than rating input of 75W (1996~1999) Except the devices less than rating input of 50W (2000 and after)

5-6	Samsung Electronics

Circuit Operation Description

The architecture and the pulse of active boost PFC

5-1-3(D) CONCLUSION

Although SMPS (Switching Mode Power Supply) enables small lightweight high-power consumption power design, it is hard to be used when stability and precise control are required. Power stage for PDP can be designed using the lightweight SMPS feature. It is important to design SMPS considering system load, stability, and related international standards.

Samsung Electronics

5-7

Circuit Operation Description

5-2 Driver Circuit

5-2-1 Driver Circuit Overview

5-2-1(A) WHAT IS THE DEFINITION OF DRIVE 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 MOSFET’s.

5-2-1(B) PANEL DRIVING PRINCIPLES

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:

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

(2)Sustain 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.)

(3)Erase 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.

5-8	Samsung Electronics

Circuit Operation Description

5-2-1(C) TYPES AND DETAILED EXPLANATION OF DRIVE DISCHARGES

(1 ) Sustaining discharge

Sustaining discharge means a self-sustaining discharge generated by the total of the sustaining pulse voltage (usually, 160~170V) alternately given to X and Y electrodes during the sustaining period and the wall voltage that varies depending upon pixels' previous discharge status. It is operated by the memory function (through this, the current status is defined by previous operation conditions) AC PDP basically possesses. That is, when there is existing wall voltage in pixels (in other words, when pixels remain ON), the total of wall voltage and a sustaining voltage to be impressed subsequently impresses a voltage equal to or above the discharge start voltage, thereby generating discharge again, but when there is no existing wall voltage in pixels (in other words, when pixels remain OFF), the sustaining voltage only does not reach the discharge start voltage, thus causing no discharge. The sustaining discharge is a section generating actual optic outputs used in displaying images.

(2)Address discharge

This means a discharge type generated by the difference between positive voltage of the address electrode (normally 70~75V determined by supplied Va voltage + positive wall charge) and the negative potential of Y electrode (supplied GND level voltage + negative wall charge). The address discharge serves to generate wall voltage in pixels where images are to be displayed (that is, discharge is to be generated) prior to the sustaining discharge section. Namely, pixels with wall voltage by the address discharge will generate sustaining discharge by the following sustaining pulses.

(3)Erase discharge

The purpose of resetting or erase discharge is to make even wall voltage in all pixels on the panel. Wall voltage, which may vary depending upon the previous sustaining discharge status, must be made even. That is, wall voltage generated by the sustaining discharge must surely be removed, by making discharges and then supplying ions or electrons. Wall voltage can be removed by making discharges and then setting a limitation on time for opposite polarity charging of the wall voltage or generating weak discharge (Low voltage erasing) to supply an appropriate quantity of ions or electrons and keep polarities from being charged oppositely. The weak discharge (Low voltage erasing) methods, which have been known to date, can largely be into two types: 1) the log pulse adopted by most companies including F Company, and 2) the ramp pulse adopted by Matsushita. In both two methods, impression is made with a slow rising slope of the erasing pulse. Because the total of the existing wall voltage and a voltage on the rising pulse must be at least the drive start voltage to generate discharges, external impressed voltage is adjusted based on the difference in wall voltage between pixels. And, weak discharge is generated because of a small impressed voltage.

Samsung Electronics

5-9