JVC PD-42X795/S, PD-50X795/Z Service Manual

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Page 1

SERVICE MANUAL

PDP COLOR TELEVISION

YA10020052

PD-42X795/S, PD-50X795

VM-42X795 / VM-50X795

[PLASMA DISPLAY UNIT]

BASIC CHASSIS

FP2

TU-42X795 / TU-50X795

[RECEIVER UNIT]

TABLE OF CONTENTS

1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11

4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-28

5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-38

No.YA100

2005/2

Page 2

SPECIFICATION

Items

Dimensions ( W × H × D ) Plasma Display Unit 116cm × 73.1cm × 10.8cm (45-3/4" × 28-7/8" × 4-1/4") 135cm × 83.6cm × 11cm (53-1/4" × 33" × 4-3/8")

Receiver Unit 43.5cm × 7cm × 31.3cm (17-1/4" × 2-7/8" × 12-3/8")

Mass Plasma Display Unit 38kg (83.6lbs) 51kg (112.2lbs)

Receiver Unit 4.3kg (9.5lbs)

TV RF System (Analog / Digital) Analog

Color System (Analog) NTSC

Sound System (Analog) BTSC (Multi Channel Sound)

Teletext System (Analog) Closed caption (T1-T4 / CC1-CC4)

TV Receiving Channels and Frequency (Analog)

TV / CATV Total Channel 191 Channels

Intermediate Frequency (Analog) Video IF

Color Sub Carrier Frequency (Analog) 3.58 MHz

Power Input AC120V, 60Hz

Power Consumption Plasma Display Unit 387.4W (Max) / 369W (Avg) 491.4W (Max) / 468W (Avg)

Plasma Display Panel (PDP) 42V wide aspect (16:9) 50V wide aspect (16:9) Screen Size Diagonal : 107.5cm (H:933cm × V : 53.3cm) Diagonal : 127.0cm (H:110.7cm × V : 62.2cm) Display Pixels Horizontal : 1024 pixels × Vertical : 768 pixels (XGA) Horizontal : 1365 pixels × Vertical : 768 pixels (W-XGA)

Audio Power Output 20W + 20W

Speaker Main (DD)

Antenna terminal (VHF/UHF, ATSC / DIGITAL CABLE IN) F-type connector, 75Ω unbalanced, coaxial × 2

Video / Audio Input [INPUT-1/2/3/4]

Digital Input Video

Audio Output

Monitor / Recording Output S-Video

PC (RGB) Input D-sub 15pin × 1

Center Channel Input 500mV(rms) (-4dBs), high impedance,RCA pin jack × 1 Sub woo fer Output More than 0 to 1000mV (rms) (+2.2dBs), low impedance (80Hz when modulated 100%), RCA pin jack × 1 Digital Audio Optical Output Digital SPDIF × 1 AV COMPULINK lll 3.5mm mini jack × 1 iLink Input/Output TS In/Out (4-pin, S400) × 2, IEEE1394 compliant DTCP digital copy protection compatible

Display Input / Output (For system cable)

Remote Control Unit RM-C14G (AA/R6 / UM-3 battery × 2)

VHF Low

VHF High

Sound IF

Receiver Unit 39.9W (Max) / 38W (Avg)

Component Video

[INPUT-1/2]

1125i / 750p

525p / 525i

[INPUT-1/3/4]

Control / Audio

CCIR (M)

Digital

ATSC terrestrial / Digital cable

02ch - 06ch : 54MHz - 88MHz 07ch - 13ch : 174MHz - 216MHz

UHF

14ch - 69ch : 470MHz - 806MHz

CATV

54MHz - 804MHz Low Band : 02 - 06 High Band : 07 - 13 Mid Band : 14 - 22 Super Band : 23 - 36 Hyper Band : 37 - 64 Ultra Band : 65 - 94, 100 - 135 Sub Mid Band : 01, 96 - 99

45.75 MHz

41.25 MHz (4.5MHz)

9.5cm × 1cm (3-3/4 × 7-7/16"), oval type × 2

Tweeter

2cm (13/16"), round type × 2

Woofer

13cm × 6.5cm (5-1/8 × 2-9/16"), oval type × 2

RCA pin jack × 6 Y : 1V (p-p) (Sync signal: 0.35V(p-p), 3-value sync.), 75 Ω

Pb/Pr : ±0.35V(p-p), 75 Ω Y : 1V (p-p), positive (Negative sync), 75 Ω Pb/Pr : 0.7V(p-p), 75 Ω

S-Video

Mini-DIN 4 pin × 3 Y: 1V (p-p), positive (Negative sync), 75 Ω C: 0.286V (p-p) (Burst signal), 75 Ω

Video

1V (p-p), positive (Negative sync), 75 Ω, RCA pin jack × 4

Audio

500mV (rms), high impedance, RCA pin jack × 8 HDMI connector × 1

(Digital-input terminal is not compatible with picture signals of computer signal)

Audio

Digital: HDMI connector × 1 Anarog: 500mV(rms) (-4dBs), high impedance, RCA pin jack × 2

RCA pin jack × 2

Variable

More than 0 to 1000mV (rms) (+2.2dBs)

Fix

500mV(rms), (-4dBs), low impedance (400Hz when modulated 100%) Mini-DIN 4pin × 1

Y: 1V (p-p), 75Ω C: 0.286V(p-p) (burst signal), 75Ω

Video

1V (p-p), 75Ω, RCA pin jack × 1

Audio

250mV(rms) (-10dBs), Fs-18dB low impedance, RCA pin jack × 2

R/G/B : 0.7V (p-p), 75Ω HD / VD : 1V (p-p) to 5V (p-p), high impedance < Available signal > VGA : 640 pixels × 480 pixels (Horizontal : 31.5kHz / Vertical : 60Hz) XGA : 1024 pixels × 768 pixels (Horizontal : 48.4kHz / Vertical : 60Hz)

D-sub 26-pin connector × 2

Video

DVI-D 24-pin connector × 2

PD-42X795 PD-50X795

Contents

Design & specifications are subject to change without notice.

1-2 (No.YA100)

Page 3

SECTION 1

PRECAUTION

1.1 SAFETY PRECAUTIONS

(1) The design of this product contains special hardware,

many circuits and components specially for safety purposes. For continued protection, no changes should be made to the original design unless authorized in writing by the manufacturer. Replacement parts must be identical to those used in the original circuits. Service should be performed by qualified personnel only.

(2) Alterations of the design or circuitry of the products should

not be made. Any design alterations or additions will void the manufacturer's warranty and will further relieve the manufacturer of responsibility for personal injury or property damage resulting therefrom.

(3) Many electrical and mechanical parts in the products have

special safety-related characteristics. These characteristics are often not evident from visual inspection nor can the protection afforded by them necessarily be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts which have these special safety characteristics are identified in the parts list of Service manual. Electrical components

having such features are identified by shading on the schematics and by ( ) on the parts list in Service manual. The use of a substitute replacement which does

not have the same safety characteristics as the recommended replacement part shown in the parts list of Service manual may cause shock, fire, or other hazards.

(4) Don't short between the LIVE side ground and

ISOLATED (NEUTRAL) side ground or EARTH side ground when repairing.

Some model's power circuit is partly different in the GND. The difference of the GND is shown by the LIVE : ( ) side GND, the ISOLATED (NEUTRAL) : ( ) side GND and EARTH : ( ) side GND. Don't short between the LIVE side GND and ISOLATED (NEUTRAL) side GND or EARTH side GND and never measure the LIVE side GND and ISOLATED (NEUTRAL) side GND or EARTH side GND at the same time with a measuring apparatus (oscilloscope etc.). If above note will not be kept, a fuse or any parts will be broken.

(5) If any repair has been made to the chassis, it is

recommended that the PDP POWER SUPPLY setting should be checked or adjusted.

(6) The high voltage applied to the PDP must conform with that

specified in Service manual. Excessive high voltage can cause an increase in arcing and possible component damage, therefore operation under excessive high voltage conditions should be kept to a minimum, or should be prevented. If severe arcing occurs, remove the AC power immediately and determine the cause by visual inspection (incorrect installation, cracked or melted high voltage harness, poor soldering, etc.). To maintain the proper components in the circuitry including the PDP must be the exact replacements or alternatives approved by the manufacturer of the complete product.

(7) Do not check high voltage by drawing an arc. Use a high

voltage meter or a high voltage probe with a VTVM. Discharge the picture tube before attempting meter connection, by connecting a clip lead to the ground frame

and connecting the other end of the lead through a 10kΩ

2W resistor to the anode button.

(8) When service is required, observe the original lead dress.

Extra precaution should be given to assure correct lead

dress in the high voltage circuit area. Where a short circuit has occurred, those components that indicate evidence of overheating should be replaced. Always use the manufacturer's replacement components.

(9) Isolation Check (Safety for Electrical Shock Hazard)

After re-assembling the product, always perform an isolation check on the exposed metal parts of the cabinet (antenna terminals, video/audio input and output terminals, Control knobs, metal cabinet, screw heads, earphone jack, control shafts, etc.) to be sure the product is safe to operate without danger of electrical shock.

a) Dielectric Strength Test

The isolation between the AC primary circuit and all metal parts exposed to the user, particularly any exposed metal part having a return path to the chassis should withstand a voltage of 3000V AC (r.m.s.) for a period of one second. (. . . . Withstand a voltage of 1100V AC (r.m.s.) to an appliance rated up to 120V, and 3000V AC (r.m.s.) to an appliance rated 200V or more, for a period of one second.) This method of test requires a test equipment not generally found in the service trade.

b) Leakage Current Check

Plug the AC line cord directly into the AC outlet (do not use a line isolation transformer during this check.). Using a "Leakage Current Tester", measure the leakage current from each exposed metal part of the cabinet, particularly any exposed metal part having a return path to the chassis, to a known good earth ground (water pipe, etc.). Any leakage current must not exceed 0.5mA AC (r.m.s.). However, in tropical area, this must not exceed 0.2mA AC (r.m.s.).

Alternate Check Method

Plug the AC line cord directly into the AC outlet (do not use a line isolation transformer during this check.). Use

an AC voltmeter having 1000Ω per volt or more sensitivity in the following manner. Connect a 1500Ω 10W resistor paralleled by a 0.15µF AC-type capacitor

between an exposed metal part and a known good earth ground (water pipe, etc.). Measure the AC voltage across the resistor with the AC voltmeter. Move the resistor connection to each exposed metal part, particularly any exposed metal part having a return path to the chassis, and measure the AC voltage across the resistor. Now, reverse the plug in the AC outlet and repeat each measurement. Any voltage measured must not exceed 0.75V AC (r.m.s.). This corresponds to

0.5mA AC (r.m.s.). However, in tropical area, this must not exceed 0.3V AC (r.m.s.). This corresponds to 0.2mA AC (r.m.s.).

AC VOLTMETER (HAVING 1000 /V, OR MORE SENSITIVITY)

0.15 F AC-TYPE

PLACE THIS PROBE

1500 10W

GOOD EARTH GROUND

ON EACH EXPOSED ME TAL PAR T

(No.YA100)1-3

Page 4

1.2 INSTALLATION

1.2.1 HEAT DISSIPATION

If the heat dissipation vent behind this unit is blocked, cooling efficiency may deteriorate and temperature inside the unit will rise. The temperature sensor that protects the unit will be activated when internal temperature exceeds the pre-determined level and power will be turned off automatically. Therefore, please make sure pay attention not to block the heat dissipation vent as well as the ventilation outlet behind the unit and ensure that there is room for ventilation around it.

1.2.2 INSTALLATION REQUIREMENTS

Ensure that the minimal distance is maintained, as specified below, between the unit with and the surrounding walls, as well as the floor etc. Install the unit on stable flooring or stands. Take precautionary measures to prevent the unit from tipping in order to protect against accidents and earthquakes.

SPACE REQUIRED FOR INSTALLATION OF THE DISPLAY UNIT

8 inch/200 mm

6 inch/150 mm

2 inch/50 mm

SPACE REQUIRED FOR INSTALLATION OF THE RECEIVER UNIT

4 inch/100 mm

POWER

PLASMA DISPLAY RECEIVER

4 inch/100 mm4 inch/100 mm 4 inch/100 mm

1.2.3 FALL TIP PREVENTION MEASURES

Take precautionary measures to prevent the unit from falling or tipping to protect against emergencies such as earthquakes as well as accidents. Fasten the supplied hook for tip fall prevention using the screws, also supplied, behind the display unit, and use them together with durable cords (to be purchased separately) to secure the unit to a robust part such as the wall surface or pillars.

6 inch/150 mm

2 inch/50 mm

1-4 (No.YA100)

The supplied hook for tipfall prevention

Page 5

1.3 PRECAUTIONS REGARDING PDP

1.3. 1 PRECAUTIONS DURING NOTES FOR TRANSPORTATION

When transporting the unit, pressure exerted on the internal PDP (Plasma Display Panel) due to improper handling (such as tossing and dropping) may cause damages even when the unit is carefully packed. To prevent accidents from occurring during transportation, pay careful attention prior to delivery such as through explaining the handling instructions to transporters. Ensure that the following requirements are met during transportation, as the PDP of this unit is made of glass and therefore fragile:

(1) Avoid vibrations and impacts

The unit may be broken if it is toppled sideways even when properly packed. Ensure that the unit is carried by at least 2 persons and pay careful attention not to exert any vibration or impact on it.

(2) Do not place equipment horizontally

Ensure that it is placed upright and not horizontally during transportation and storage as the PDP is very vulnerable to lateral impacts and may break easily under such circumstances. During transportation, ensure that the unit is loaded along the traveling direction of travel of the vehicle, and avoid stacking them on one another. For storage, ensure that they are stacked in 2 layers or less even when placed upright.

1.3.2 RESIDUAL IMAGE / BURN-IN ON SCREEN

Like CRTs, "burn-in" may occur when a same image is continuously displayed over an extended period of time. As this may also shorten the life span of the PDP. Therefore, turn off the display when not in use, scroll the screen, make use of screen-savers, or allow even distribution on the display by inverting the brightness, switching to complementary colors or inserting animated images at periodic intervals. As burn-in is more likely to occur with high brightness and contrast settings, try to use neutral gradations or medium tone colors. Burn-in does not occur in the case of animated images. When switching to another image after continuous display of the previous image, residual images may become prominent, as luminance in a part of the display is higher than the other parts. This is not a defect but is because due to the discharge surface of the lighted portion has become being relatively activated and its luminance higher than the unlighted parts.

1.3.4 OPTICAL FILTER (PANEL FILTER)

Avoid placing the unit under direct sunlight over a prolonged period of time. This may cause the optical filter to deteriorate in quality and color. Clean the filter surface by wiping it softly lightly with outing flannels a soft and lightly fuzz cloth (such as flannel). Do not use solvents such as benzine or thinner to wipe the filter surface. This may cause the filter to deteriorate in quality or the coating on the surface to come off. As the filter surface is fragile., do not scratch or hit it with hard materials.

1.3.5 NOTES PRECAUTIONS FOR PEPLACEMENT OF EXTERIOR PARTS

Take note of the following when replacing exterior parts (back REAR COVER, FRONT PANEL, optical filter)

• Do not exert pressure on the front of the PDP (glass surface).

• Pay careful attention not to scratch or stain the front of the PDP

(surface) with hands.

• When replacing exterior parts, the front of the PDP should be

placed facing downward. Place a mat, etc. underneath to avoid causing scratches to the front surface. However, never use materials that are too soft (such as blanket cloth). If replacement is made with the PDP surface facing downward and in contact with the blanket, pressure may be exerted on the PDP, thus causing damages to it.

1.3.3 INFRARED RAYS

Near Near-infrared rays (800nm to 1000nm) are emitted from the front of the panel, and this may give rise to malfunctions in infrared remote controls or communication systems placed near it. In this case, avoid direct infrared rays (and reflected rays in some cases) from the screen by either changing the direction of the unit or other infrared systems or securing a longer keeping a distance from the screen.

(No.YA100)1-5

Page 6

SECTION 2

LOB OK FAN OK SYNC M:OK S:OK HD:NG TIM OK MSM OK DIGI 0000 MEM OK AVSW OK YC OK AIO OK TUN OK GCR NG 1 IP OK RGB OK 8 DVI OK HDMI OK

SERVICE MENU

1.ADJUST

2.SELF_CHK

3.I2C STOP

SPECIFIC SERVICE INSTRUCTIONS

2.1 FEATURES

D.I.S.T. (Digital Image Scaling Technology)

This system uses line interpolation to double the number of scanning lines and achieve high resolution, flicker-free picture.

SMART CAPTION

Smart caption will appear when you press the MUTING button, only on channels where the broadcast contains CLOSED CAPTION information.

SMART SOUND

Decreases high sound levels, giving a regulated sound level.

VIDEO STATUS

Expression of a favorite screen can be chosen by the VIDEO STATUS function.

[STANDARD ↔ DYNAMIC ↔ THEATER ↔ GAME]

DIGITAL INPUT

Digital-in will display when any picture signal (480i/ 480p, 720p/ 1080i) in Digital-in is displayed.

V-CHIP

Since the V-CHIP is built in, it can choose, view and listen to a healthy program.

MTS STEREO

The voice multiplex function of the MTS system is built in. (MTS = Multi channel Television Sound system)

NATURAL CINEMA

Watching the movie or animation, press the Natural Cinema to adjust the out line of the images to make thin more sharp.

BBE

High definition audio adds natural, clear and extraordinary sound quality to any program.

VIDEO INPUT LABEL

This function is used to label video input connections for the onscreen displays.

A.H.S.

Adds a more spacious surround sound. Music gives basic effect and Movie for more effect.

2.2 SYSTEM SETTEING

Be sure to carry out the following operation at the end of the procedure.

(1) Set to 0 minutes using the [SLEEP TIMER] key. (2) Press the [VIDEO STATUS] key and [DISPLAY] key

simultaneously, then enter the SERVICE MODE.

(3) When the Main Menu is displayed, press [2] key to enter

the self check mode.

(4) Turn off the power by pressing the [POWER] key on the

remote control unit.

MAIN MENU SCREEN

SERVICE MENU

1.ADJUST

2.SELF_CHK

3.I2C STOP

SELF CHECK MODE SCREEN

LOB OK FAN OK SYNC M:OK S:OK HD:NG TIM OK MSM OK DIGI 0000 MEM OK AVSW OK YC OK AIO OK TUN OK GCR NG 1 IP OK RGB OK 8 DVI OK HDMI OK

1-6 (No.YA100)

Page 7

2.3 TECHNICAL INFORMATION

2.3.1 PDP STRUCTURE AND CHARACTERISTIC

This unit uses the flat type panel PDP (Plasma Display Panel), instead of the conventional CRT (Cathode Ray Tube), as a display unit.

2.3.1.1 PIXEL (CELL) ARRAY

PDP is constructed by sealing the xenon, which emits neon and ultraviolet rays for discharging purpose, in between the electrodes lay on the front glass substrate and rear glass substrate. One pixel is composed of 3 RGB cells, with cell pitch of 0.280mm (1 pixel 0.810mm) [PD-50X795] / 0.304 mm (1 plxel 0.912 mm) [PD- 42X795] horizontally and 0.810mm [PD-50X795] / 0.693 mm [PD-42X795] vertically. The cell is arrayed in each RGB color as shown in Fig. 1. One pixel is formed by interlacing each RGB color cell. One cell size is 0.280mm [PD-50X795] / 0.304 mm [PD-42X795] horizontally and 0.810mm [PD-50X795] / 0.693 mm [PD-42X795] vertically.

Direction

Vertically

Horizontally

No.1

Pixel line

No.2

Pixel line

No.767

Pixel line

No.768

Pixel line

PD-50X795 PD-42X795

No.1365 No.1366

No.1 Pixel

sequence

No.2 Pixel

sequence

No.1023

Pixel

sequence

No.1024

Pixel

sequence

B G R B G R B GRBG R

BGRBGR BGRBGR

1 pixel (1 dot)

0.810mm

0.921mm 0.304mm

(Horizontally) Pixel pitch

B Cell

Cell

R Cell

0.280mm

(Horizontally) Cell pitch

PD-50X795 PD-42X795

0.810mm PD-50X795

0.693mm PD-42X795 (Vertically)

Pixel pitch(Cell pitch)

PD-50X795 PD-42X795

Fig.1

2.3.1.2 PIXEL DEFECTS

Though PDP is made by means of ultra precise technology, there are cases whereby not all pixels (cell) will function properly. In some cases, there may be defective pixels that do not light at all or the ones that always light on. There are 3 types of Pixel defects, [Bright Dot Defects], [Dark Dot Defects] and [Flicker Dot Defects], as defined respectively in the following:

(1) BRIGHT FAULT

In this pixel fault, a cell that should not light originally is lighting on and off. For checking this pixel fault, input ALL BLACK SCREEN and find out the cell that is lighting on and off.

(2) DARK FAULT

In this pixel fault, a cell that should light originally is not lighting or lighting with the brightness twice as brighter as originally lighting. For checking this pixel fault, input 100% of each R/G/B colour and find out the cell that is not lighting.

(3) FLICKER FAULT

In the pixel fault, a cell that should light originally or not light originally is flashing on and off. For checking this pixel fault, input ALL BLACK SCREEN signal or 100% of each RGB colour and find out the cell that is flashing on and off.

(No.YA100)1-7

Page 8

2.3.2 MAIN CPU PIN FUNCTION [IC7601 = DIGITAL SIGNAL PWB ASS'Y : RECEIVER UNIT]

Pin Pin name I/O Function Pin Pin name I/O Function

1 VHOLD1 I Data slice for main screen closed caption 51 NC O Not used

2 HFLT1 I/O LPF for main screen closed caption video input 52 NC O Not used

3 NC O Not used 53 NC O Not used

4 NC O Not used 54 NC O Not used

5 DIGR0 O R [0] for OSD 55 NC O Not used

6 TB1in I AC power for timer clock 56 NC O Not used

7 REMO I Remote control 57 NC O Not used

8 BYTE I Not used 58 NC O Not used

9 CNVss I CPU programming mode select [Normal = L] 59 NC O Not used

10 DIGG0 O G [0] for OSD 60 NC O Not used

11 DIGB0 O B [0] for OSD 61 NC O Not used

12 RESET I Reset for main CPU [Reset = L] 62 HSYNC I H. sync for OSD

13 Xout O System clock osillation (crystal) : 16MHz 63 NC O Not used

14 Vss - GND 64 VSYNC I V. sync for OSD

15 Xin I System clock osillation (crystal) : 16MHz 65 NC O Not used

16 VccI I 3.3V power supply 66 NC O Not used

17 OSC1 I Clock for OSD 67 NC O Not used

18 OSC2 O Not used 68 NC O Not used

19 INT1 I AV COMPULINK control 69 NC O Not used

20 INT0 I

21 OUT1 O Ys (blanking) for OSD 71 NC O Not used

22 OUT2 O YM (transparence) for OSD 72 NC O Not used

23 NC O Not used 73 NC O Not used

24 NC O Not used 74 NC O Not used

25 NC O Not used 75 NC O Not used

26 NC O Not used 76 NC O Not used

27 CTA2/RTS2 O Not used 77 NC O Not used

28 CLK2 O Not used 78 NC O Not used

29 RxD2 O Data transmission (serial) for digital tuner control 79 NC O Not used

30 TxD2 I Data receive (serial) for digital tuner control 80 NC O Not used

31 SDA2 I/O Not used 81 NC O Not used

32 DIGR1 O R [1] for OSD 82 NC O Not used

33 DIGG1 O G [1] for OSD 83 NC O Not used

34 DIGB1 O B [1] for OSD 84 WAKE O

35 TxD0 I Data receive (serial) for external programming 85 CARD_DET I Card detection for ATSC digital tuner [Detection = L]

36 RxD0 O Data transmission (serial) for external programming 86

37 CLK0 I Clock for external programming 87 SDAM I/O

38 RTS0 O Busy for external programming [Operation = H] 88 SCLM O

39 P5.7 I Not used 89 DIGR2 O R [2] for OSD

40 P5.6 O Not used 90 DIGG2 O G [2] for OSD

41 HOLD I CPU programming hold [Hold = H] 91 DIGB2 O B [2] for OSD

42 P5.4 O Not used 92 NC O Not used

43 P5.3 O Not used 93 KEY2 I Key scan data for display switch button KEY2

44 P5.2 O Not used 94 KEY1 I Key scan data for display switch button KEY1

45 P5.1 O Not used 95 VHOLD2 I Data slice for sub screen closed caption

46 WR O CPU programming mode select [Normal = L] 96 HLF2 I/O LPF for sub screen closed caption video input

47 P4.7 O

48 P4.6 I

49 P4.5 I Clock for sub(chassis) CPU communication (serial) 99 VCCE I 5V power supply

50 P4.4 O Not used 100 CVIN1 I Video(Y) for main screen closed caption

Request for sub(chassis) CPU communication (serial data)

Data transmission for sub(chassis) CPU communication (serial)

Data receive for sub(chassis) CPU communication (serial)

70 NC O Not used

Sleep mode release for sub(chassis) CPU [Release = L]

POWER_SW

97 CVIN2 I Video(Y) for sub screen closed caption

98 TVSETB I Test terminal [L Fixed]

I Power switch (mechanical) detection [Detection = L]

Data for Inter IC (serial) bus control : main memory (IC7602)

Clock for Inter IC (serial) bus control : mainmemory (IC7602)

1-8 (No.YA100)

Page 9

2.3.3 SUB (CHASSIS) CPU PIN FUNCTION [IC7001 = DIGITAL SIGNAL PWB ASS'Y : RECEIVER UNIT]

Pin Pin name I/O Function Pin Pin name I/O Function

1 LB_PRO O Not used 51 BS_TXD O Data transmission for digital tuner communication

2 P_MU O Picture muting [Muting = H] 52 BS_RXD I Data receive for digital tuner communication

3 JP_CSB O Not used 53 NC O Not used

4 A_MU O Audio muting (for AUDIO OUT) [Muting = H] 54 VREF+ I 3.3V power supply

5 M_MU O Audio muting (for MONITOR OUT) [Muting = H] 55 PDP_TX O

6 PC_SEL O RGB(PC) INPUT select [ON = H] 56 PDP_RX I Data receive for

7 ON_TIMER O POWER INDICATOR (LED) brightness [LOW = L] 57 SDA0 I/O Data for Inter IC (serial) bus : sub memory (IC7002)

8 ILA0 O Not used 58 SCL0 O Clock for Inter IC (serial) bus : sub memory (IC7002)

9 ILA1 O Not used 59 SDA_DVI I/O Data for Inter IC (serial) bus for panel communication

10 ILA2 O Not used 60 SCL_DVI O Clock for Inter IC (serial) bus for panel communication

11 POW_LED O POWER LED lighting [ON = H] 61 AVSS - GND

12 WORD O Not used 62 DIGI_PHOT I Photo sensor for DIGITAL-IN illegal copy protection

13 MI_CK I Clock for main CPU communication 63 AGC I Not used

14 MI_TX I Data receive for main CPU communication 64 EXT_YS1 I Not used

15 MI_RX O Data transmission for main CPU communication 65 EXT_YS2 I Not used

16 MI_REQ O

17 VDD I 3.3V power supply 67 DIGI_PRO O DIGITAL-IN voltage detection [Detection = H]

18 FOSC O Not used 68 GCR_RST O Not used

19 VSS - GND 69 GR_ON O Not used

20 X1 I 3.3V power supply 70 SYNC_SEL O Multi screen control [Digital = L]

21 X0 O Not used 71 NC O Not used

22 VDD I 3.3V power supply 72 NC O Not used

23 OSC1 I System clock osillation (crystal) : 16MHz 73 SBD5 I/O

24 OSC0 O System clock osillation (crystal) : 16MHz 74 SBT5 I

25 MODE I 3.3V power supply 75 NMI I 3.3V power supply

26 BS1.5CTL O Digital tuner power control [ON = H] 76 COMP I Not used

27 A92RES O

28 BS_RST O Reset for Digital tuner [Reset = L] 78 VSYNC I V. sync pulse

29 LIP_RST O Not used 79 WAKE I

30 SOFT_OFF O Not used 80

31 VMUTE I Picture muting request from digital tuner [Muting = L] 81 NC O Not used

32 VOUTENB O Video cutoff for digital tuner [Cufoff = H] 82 RST I Reset for

33 MDR_CON I System cable connection monitor for display unit (PDP) 83 VDD I 3.3V power supply

34 AVDD I 3.3V power supply 84 SCL3A O Clock for Inter IC (serial) bus control

35 BS_POW O Not used 85 SDA3A I/O Data for Inter IC (serial) bus control

DsyncSW2

37 LB_POW O Not used 87 SDA3B I/O Data for Inter IC (serial) bus control

38 NC O Not used 88

39 HOTPLUG I Video communiation monitor for display unit (PDP) 89 DIGI_LRSW O DIGITAL-IN control

40 MECA_SW I Mechanical monitor for POWER switch [Push = L] 90 DIGI_INT I Reset for HDMI process [Reset = L ]

41 MAIN_POW O Main power control [ON = L] 91 DVI_RST O Reset for DVI format conversion

42 MSP_RST O AUDIO OUT output mode select [VARIABLE = L] 92 VSS - GND

43 VREF- I Standard Voltage (0V) power supply 93 SCL5055 O

44 AFT2 I Not used 94

45 AFT1 I AFT voltage for VHF/UHF tuner 95 SDA5055 I/O Data for Inter IC (serial) bus : JCC5055 (DIST process)

46 KEY2 I Not used 96

47 KEY1 I Not used 97 NC O Not used

48 NC O Not used 98 15K/OTH O Main video select [Fixed H]

49 NC O Not used 99 DsyncSW1 O Sync select for DIGITAL-IN [Cotrolled with 36-pin]

50 AC_IN I AC power pulse for timer clock 100 57 BUSY I Busy monitor for JCC5057 (RGB process)

Data request for main CPU communication [Request = L]

Reset for IC1001(3D YC SEP / COLOR DEMODULAT) [Reset = H]

O Sync select for DIGITAL-IN [Cotrolled with 99-pin] 86 SCL3B O Clock for Inter IC (serial) bus control

66 VDD I 3.3V power supply

77 REMO I Remote control

POWERGOOD

DIGI_SYNCSEL

VFORMATSEL

OSD_MODE_SEL

Data transmission for panel CPU communication

panel

CPU communication

Data for writing on board (connect CN01P : for Frash ROM type)

Clock for writing on board (connect CN01P : for Frash ROM type)

Sleep mode release for sub(chassis) CPU [Release = L]

I Power error detection NG = H]

sub(chassis)

O Not used

Clock for Inter IC (serial) bus : JCC5055 (DIST process)

O Not used

CPU [Reset = L]

(No.YA100)1-9

Page 10

2.3.4 PANEL CPU PIN FUNCTION [IC807 = DISPLAY INTERFACE PWB ASS'Y : DISPLAY UNIT]

Pin Pin name I/O Function Pin Pin name I/O Function

1 SYSTEM0 I PDP size select [0V=50V XGA, 1.75V=42V XGA] 34 NC O Not used

2 SYSTEM3 I PDP maker select [0V=SAMSUNG, 1.75V=LG] 35 NMI I Port for writing on board control [Writing=L]

3 AVCC - 5.0V power suplly 36 A_MU O Audio muting [Muting=H]

4 X2 - Not used 37 HD I Not used

5X1 -GND 38

6 VCL - GND 39 REMO I Not used

7 RES I Reset for panel CPU [Reset=L] 40 LED_POW O POWER LED control [ON=H]

8 TEST I GND 41 P85 I

9 VSS - GND 42 P86 - Emulator connection

10 OSC2 O System clock osillation (crystal) : 16MHz 43 P87 - Emulator connection

11 OSC1 I System clock osillation (crystal) : 16MHz 44 SCK3 O Clock for writing on board

12 VCC - 5.0V power suplly 45 RXD I Data receive for writing on board

13 PW_LOB O Power control [ON=L] 46 TXD O Data trnsmission for writing on board

PANEL_PW_ON

15 NC O Not used 48 NC O Not used

16 NC O Not used 49 RXD2 I Data receive for main CPU communication

17 I2C_STOP O Inter IC (serial) bus stop control [Stop=L] 50 TXD2 O Data transmission for main CPU communication

18 APL_S_CLK O Clock for APS loading [PD-50X795] 51 IRQ O Sleep mode release [Rlease=H]

19 PSCK O Clock for APS writing [PD-50X795] 52 ACTIVE I Power switch (mechanical) detection [Detection=H]

20 PLE O APS loading control [PD-50X795] 53 VD I V. sync pulse

21 CLE O APS writing control [PD-50X795] 54 REC_DET I System cable monitor for receiver unit [Connection=L]

22 PSSC O Data transmission for APS loading [PD-50X795]

23 SDA1 I/O

24 PWM O Not used

25 SCL1 O

26 SDA0 I/O

27 SCL0 O

28 SDA2 I/O

29 SCL2 O

30 SLE O PDP communication control [PD-50X795] 61 AMP_PRO1 I Not used

31 NC I/O Not used 62 EE_CDS I Not used

32 NC O Not used 63 KEY1 I Not used

33 NC O Not used 64 KEY2 I Not used

O Panel power control [ON=L] 47 AC_DET I AC power frequency detection [Detection=H]

Data for Inter IC (serial) bus control : panel memory (IC805)

Clock for Inter IC (serial) bus control : panel memory (IC805)

Data for Inter IC (serial) bus control : Audio control, Temp. sensor

Clock for Inter IC (serial) bus control : Audio control, Temp. sensor

Data for Inter IC (serial) bus control : PDP communication

Clock for Inter IC (serial) bus control : PDP communication

LED_ONTIMER

55 PSS

56 FAN_LOCK I Fan abnormality detection [Detection=L] [PD-50X795]

57 SYSTEM2 I Not used

58 SYSTEM 1 I Fan select [Used=H]

59 THEM_DET I Temp. sensor detection [Detection=H]

(AMP_PRO2)

O POWER LED stand-by control [ON=H]

Emulator connection / Port for writing on board [Writing=H]

I PDP Inter IC (serial) bus communication select

[Permission=H][PD-42X795], Data receive for APS loading [PD-50X795]

IGND

1-10 (No.YA100)

Page 11

SECTION 3

DISASSEMBLY

3.1 DISASSEMBLY PROCEDURE [DISPLAY UNIT: PD-42X795]

NOTE:

• When exchanging parts etc. with the front side (PDP side) fancing down, place a protection sheet under the DISPALY UNIT to prevent scratches on the front side.

• It is advisable to take notes of the connecting locations (connector numbers) of the removed connectors.

3.1.1 REMOVING THE REAR COVER (Fig.1)

(1) Remove the power cord and system cable. (2) Remove the 9 screws [A] and the 12 screws [B], then

remove the REAR COVER.

3.1.2 REMOVING THE BACK COVER AND SPEAKER HOLDER (Fig.1)

(1) Remove the 8 screws [C], then remove the BACK COVER. (2) Remove the SPEAKER HOLDER.

3.1.3 REMOVING THE TERMINAL COVER (Fig.1.)

• Remove the REAR COVER.

(1) Remove the 6 screws [D], then remove the CHASSIS

SHIELD BRACKET.

(2) Remove the 2 screws [E] and the 5 screws [F], then

remove the TERMINAL COVER.

3.1.4 REMOVING THE LINE FILTER PWB (Fig.1)

• Remove the REAR COVER.

• Remove the CHASSIS SHIELD BRACKET.

• Remove the TERMINAL COVER.

(1) Remove the 2 claws [G], then remove the LINE FILTER

INSULATOR.

(2) Disconnect the connector [CN8001

POWER PWB .

(3) Remove the 2 screws [H] and the 2 screws [I], then remove

the LINE FILTER PWB.

] from the MAIN

3.1.6 REMOVING THE DISPLAY INTERFACE PWB (Fig.1)

• Remove the REAR COVER.

• Remove the CHASSIS SHIELD BRACKET.

• Remove the TERMINAL COVER. (1) Disconnect the connectors [CN00A

[CN00E [CNAH2

(2) Remove the 4 screws [K], the 2 screws [L] ,and the 2

screws [M], then remove the DISPLAY INTERFACE PWB.

3.1.7 REMOVING THE CHASSIS BASE PWB (Fig.1.)

• Remove the REAR COVER.

• Remove the CHASSIS SHIELD BRACKET.

• Remove the TERMINAL COVER.

• Remove the LINE FILTER PWB.

• Remove the AUDIO PWB.

• Remove the DISPLAY INTERFACE PWB. (1) Remove the 2 screws [N], then remove the CHASSIS

BASE PWB.

] / [CN00Q] / [CN00T] / [CN00X] / [CN00V] /

] from the DISPLAY INTERFACE PWB .

] / [CN00C] / [CN00D] /

3.1.5 REMOVING THE AUDIO PWB (Fig.1)

• Remove the REAR COVER.

• Remove the CHASSIS SHIELD BRACKET.

• Remove the TERMINAL COVER. (1) Disconnect the connectors [CN60SL

[CN60SR

(2) Disconnect the connector [CN9001

PWB.

(3) Disconnect the connector [CN00A

from the DISPLAY INTERFACE PWB .

(4) Remove the 4 screws [J], then remove the AUDIO PWB.

] from the AUDIO PWB .

] / [CN60CB] /

] from the SUB POWER

] / [CN00C] / [CN00D]

(No.YA100)1-11

Page 12

REAR COVER

BACK COVER

CHASSIS SHIELD BRACKET

DISPLAY

INTERFACE

PWB

INSULATOR

AUDIO

PWB

LINE

FILTER

PWB

TERMINAL

COVER

TOP

SPEAKER HOLDER

CHASSIS BASE

SPEAKER HOLDER

Fig.1

1-12 (No.YA100)

Page 13

3.1.8 REMOVING THE TEMP. SENSOR PWB (Fig.2)

• Remove the REAR COVER. (1) Disconnect the connector [CN800V

SENSOR PWB PWB .

(2) Remove the 1 screw [O], then remove the TEMP.

SENSOR PWB.

3.1.9 REMOVING THE MAIN POWER PWB (Fig.2)

• Remove the REAR COVER. (1) Disconnect the connector [CN8001

/ [CN8005 from the MAIN POWER PWB .

(2) Remove the 8 screws [P], then remove the MAIN POWER

PWB.

(3) Remove the POWER PWB BRACKET and INSULATOR.

3.1.10 REMOVING THE SUB POWER PWB (Fig.2)

• Remove the REAR COVER. (1) Disconnect the connector [CN9001

from the SUB POWER PWB .

(2) Remove the 4 screws [Q], then remove the SUB POWER

PWB.

(3) Remove the INSULATOR.

3.1.11 REMOVING THE DISPLAY SWITCH PWB (Fig.2)

• Remove the BACK COVER.

• Remove the SPEAKER HOLDER. (1) Remove the 2 screws [U] and 3 screws [V], then remove

the DISPLAY SWITCH PWB and CONTROL KNOB.

(2) Disconnect the connector [CN000T

SWITCH PWB .

3.1.12 REMOVING THE DISPLAY LED PWB (Fig.2)

• Remove the BACK COVER.

• Remove the SPEAKER HOLDER.

• Remove the DISPLAY SWITCH PWB. (1) Remove the 2 screws [T], then remove the DISPLAY LED

PWB.

(2) Disconnect the connector [CN000X

LED PWB .

] / [CN8003] / [CN8002] / [CN9001] / [CN8009]

] from the TEMP.

] / [CN8008] / [CN8006]

] / [CN9002] / [CN9005]

] from the DISPLAY

3.1.14 REMOVING THE WOOFER SPEAKER (Fig.2)

• Remove the REAR COVER. (1) Disconnect the connector [CN60CB

PWB.

(2) Remove the 6 screws [V], then remove the WOOFER

SPEAKER UNIT.

(3) Remove the 8 screws [W], then remove the DUCT

COVER.

(4) Remove the 12 screws [X], then remove the WOOFER

BACK COVER.

(5) Remove the 8 screws [Y], then remove the WOOFER

SPEAKER.

3.1.15 REMOVING THE PDP (PANEL) UNIT (Fig.2)

• Remove the REAR COVER.

• Remove the CHASSIS SHIELD BRACKET.

• Remove the TERMINAL COVER.

• Remove the CHASSIS BASE(with each PWB affixed on the CHASSIS BASE).

• Remove the TEMP. SENSOR.

• Remove the MAIN POWER PWB.

• Remove the SUB POWER PWB. (1) Disconnect the connector [CN60SL

[CN60SR] from the AUDIO PWB .

(2) Disconnect the connector [CN00A] / [CN00C] / [CN00D] /

[CN00E [CNAH2] from the DISPLAY INTERFACE PWB.

(3) Remove the 16 screws [Z], then remove the BACK

BRACKET.

(4) Lift the PDP upright and remove it with enough care not to

impose shock to the PDP.

CAUTION:

• Two or more people are required to remove the PDP unit.

• The gas pouring port is covered with the protection

material.In operation, be careful not to damage the gas pouring port.

• Do not touch the front side (glass) of the PDP with your

fingers.

] / [CN00Q] / [CN00T] / [CN00X] / [CN0V] /

] from the AUDIO

] / [CN60CB] /

3.1.13 REMOVING THE DD SPEAKER (Fig.2)

• Remove the REAR COVER.

• Remove the BACK COVER.

• Remove the SPEAKER HOLDER. (1) Disconnect the connector [CN60SR

AUDIO PWB .

(2) Remove the 4 screws [U], then remove the DD SPEAKER.

] / [CN60SL] from the

(No.YA100)1-13

Page 14

BACK FRAME

BRACKET

INSULATOR

SUB POWER PWB

INSULATOR

TEMP. SENSOR PWB

MAIN POWER PWB

POWER PWB BRACKET

INSULATOR

BACK FRAME

BRACKET

GAS insertion

hole

DD SPEAKER

INSULATOR

DISPLAY SWITCH PWB

CONTROL KNOB

PDP UNIT

DD SPEAKER

DISPLAY LED PWB

DUCT COVER

DUCT

WOOFER BACK COVER

COVER

WOOFER

SPEAKER

1-14 (No.YA100)

TOP

WOOFER SPEAKER

Fig.2

Page 15

3.1.16 REMOVING THE PWB IN PDP UNIT

3.1.16.1 REMOVING THE LOGIC-BUFFER-E PWB (Fig.3)

• Remove the PDP UNIT. (1) Disconnect the connector [CN806

[CN2502

] / [CN2503] / [CN2504] / [CN2505] / [CN2506] /

] / [CN2500] / [CN2501] /

[CN2507] / [EF1] from the LOGIC-BUFFER-E PWB .

(2) Remove the 14 screws [a], then remove the LOGIC-BUFF-

ER-E PWB.

3.1.16.2 REMOVING THE LOGIC-BUFFER-F PWB (Fig.3)

• Remove the PDP UNIT. (1) Disconnect the connector [CN402

[CN2601 [CN2606

] / [CN2602] / [CN2603] / [CN2604] / [CN2605] / ] / [CN2607] / [FE1] from the LOGIC-BUFFER-F

] / [CN807] / [CN2600] /

PWB .

(2) Remove the 14 screws [b], then remove the LOGIC-BUFF-

ER-F PWB.

3.1.16.3 REMOVING THE X-MAIN PWB (Fig.3.)

• Remove the PDP UNIT. (1) Disconnect the connector [CN4001

] / [CN4002] / [CN4003]

/ [CN4004] / [CN4005] from the X-MAIN PWB .

(2) Remove the 8 screws [c], then remove the X-MAIN PWB.

3.1.16.4 REMOVING THE LOGIC-MAIN PWB (Fig.3)

• Remove the PDP UNIT. (1) Disconnect the connector [CN2001

/ [CN2004

] / [CN2005] / [CN2006] / [CN207] / [LA1] from

] / [CN2002] / [CN2003]

the LOGIC-MAIN PWB . Remove the 6 screws

(2)

[d]

, then remove the LOGIC-MAIN PWB.

3.1.16.5 REMOVING THE Y-MAIN PWB (Fig.3.)

• Remove the PDP UNIT. (1) Disconnect the connector [CN5001

] / [CN5002] / [CN5003] / [CN5004] / [CN5005] / [CN5006] / [CN5007] / [CN5008] from the Y-MAIN PWB .

(2) Remove the 7 screws [e], then remove the Y-MAIN PWB.

3.1.16.6 REMOVING THE Y-BUFFER-U PWB (Fig.3)

• Remove the PDP UNIT. Disconnect the connector [CN5401] / [CN5402] / [CN5403] /

(1)

[CN5404

(2)

Remove the 3 screws

] / [CN5405] / [CN5407] from the Y-BUFFER-U PWB.

[f]

,then remove the Y-BUFFER-U PWB

3.1.16.7 REMOVING THE Y-BUFFER-L PWB (Fig.3)

• Remove the PDP UNIT. Disconnect the connector [CN5501] / [CN5502] / [CN5503] /

(1)

[CN5504

(2)

Remove the 3 screws

] / [CN5505] / [CN5507] from the Y-BUFFER-L PWB.

[g]

, then remove the Y-BUFFER-L PWB

LOGIC-BUFFER-F PWB

-BUFFER-U PWB

Y-MAIN PWB

LOGIC-BUFFER-E PWB

Y-BUFFER-L PWB

LOGIC-BUFFER-E PWB

Fig.3

X-MAIN PWB

LOGIC-BUFFER-F PWB

LOGIC-MAIN PWB

(No.YA100)1-15

Page 16

3.1.17 REMOVING THE FRONT FILTER (Fig.4.)

• Remove the REAR COVER.

• Remove the CHASSIS SHIELD BRACKET.

• Remove the TERMINAL COVER.

• Remove the CHASSIS BASE (with each PWB affixed on the CHASSIS BASE).

• Remove the TEMP. SENSOR.

• Remove the MAIN POWER PWB.

• Remove the SUB POWER PWB.

• Remove the PDP UNIT. (1) Remove the 12 screws [h], then remove the GLASS

HOLDER.

(2) Remove the FRONT FILTER with enough care not to

damage it.

3.1.18 REMOVING THE TOP FRAME BRACKET, BOTTOM FRAME BRACKET AND SIDE FRAME BRACKET (Fig.4.)

• Remove the REAR COVER.

• Remove the CHASSIS SHIELD BRACKET.

• Remove the TERMINAL COVER.

• Remove the CHASSIS BASE (with each PWB affixed on the

CHASSIS BASE).

• Remove the TEMP. SENSOR.

• Remove the MAIN POWER PWB.

• Remove the SUB POWER PWB.

• Remove the PDP UNIT.

• Remove the FRONT FILTER.

Remove the 6 screws

(1)

[i], then remove

the FRONT PANEL

(2) Remove the 4 spacers [j], the 4 screws [k], then remove

the TOP FLAME BRACKET, BOTTOM FLAME BRACKET and SIDE FLAME BRACKET.

GLASS HOLDER

SIDE FRAME BRACKET

TOP FRAME BRACKET

SIDE FRAME BRACKET

BOTTOM FRAME BRACKET

1-16 (No.YA100)

FRONT FILTER

TOP

FRONT PANEL

Fig.4

Page 17

3.2 DISASSEMBLY PROCEDURE [DISPLAY UNIT: PD-50X795]

NOTE:

• When exchanging parts etc. with the front side (PDP side) fancing down, place a protection sheet under the DISPALY UNIT to prevent scratches on the front side.

• It is advisable to take notes of the connecting locations (connector numbers) of the removed connectors.

3.2.1 REMOVING THE REAR COVER (Fig.5)

(1) Remove the power cord and the system cable. (2) Remove the 11 screws [A] and the 22 screws [B], then

remove the REAR COVER.

3.2.2 REMOVING THE BACK COVER AND SPEAKER HOLDER (Fig.5)

(1) Remove the 8 screws [C], then remove the BACK COVER. (2) Remove the SPEAKER HOLDER.

3.2.3 REMOVING THE TERMINAL COVER (Fig.5)

• Remove the REAR COVER.

(1) Remove the 6 screws [D], then remove the CHASSIS

SHIELD BRACKET.

(2) Remove the 2 screws [E] and the 5 screws [F], then

remove the TERMINAL COVER.

3.2.4 REMOVING THE LINE FILTER PWB (Fig.5)

• Remove the REAR COVER.

• Remove the CHASSIS SHIELD BRACKET.

• Remove the TERMINAL COVER.

(1) Remove the 2 claws [G], then remove the LINE FILTER

INSULATOR.

(2) Disconnect the connector [CN8001

POWER UNIT.

(3) Remove the 2 screws [H] and 2 screws [I], then remove the

LINE FILTER PWB.

] from the MAIN

3.2.6 REMOVING THE DISPLAY INTERFACE PWB (Fig.5)

• Remove the REAR COVER.

• Remove the CHASSIS SHIELD BRACKET.

• Remove the TERMINAL COVER. (1) Disconnect the connector [CN00A

[CN00E] / [CN00G] / [CN00Q] / [CN00T] / [CN00X] / [CN00V DISPLAY INTERFACE PWB .

(2) Remove the 3 screws [K], the 2 screws [L] and 2 screws

[M] , then remove the DISPLAY INTERFACE PWB.

3.2.7 REMOVING THE CHASSIS BASE (Fig.5)

• Remove the REAR COVER.

• Remove the CHASSIS SHIELD BRACKET.

• Remove the TERMINAL COVER.

• Remove the LINE FILTER PWB.

• Remove the AUDIO PWB.

• Remove the DISPLAY INTERFACE PWB. (1) Remove the 2 screws [N], then remove the CHASSIS

BASE.

] / [CN0FL] / [CN0FR] / [CN601] / [CNAH1] from the

] / [CN00C] / [CN00D] /

3.2.5 REMOVING THE AUDIO PWB (Fig.5.)

• Remove the REAR COVER.

• Remove the CHASSIS SHIELD BRACKET.

• Remove the TERMINAL COVER. (1) Disconnect the connector [CN60SL

[CN60SR

(2) Disconnect the connector [CN9001] from the SUB POWER

PWB.

(3) Disconnect the connector [CN00A

from the DISPLAY INTERFACE PWB.

(4) Remove the 4 screws [J], then remove the AUDIO PWB.

] from the AUDIO PWB .

] / [CN60CB] /

] / [CN00C] / [CN00D]

(No.YA100)1-17

Page 18

BACK COVER

REAR COVER

INSULATOR

BACK COVER

CHASSIS SHIELD BRACKET

DISPLAY

INTERFACE

PWB

CHASSIS BASE

LINE

FILTER

PWB

AUDIO

PWB

TERMINAL

COVER

TOP

1-18 (No.YA100)

SPEAKER HOLDER

Fig.5

Page 19

3.2.8 REMOVING THE TEMP. SENSOR PWB (Fig.6)

• Remove the REAR COVER. (1) Disconnect the connector [CN800V

SENSOR PWB PWB .

(2) Remove the 1 screw [O], then remove the TEMP.

SENSOR PWB.

3.2.9 REMOVING THE MAIN POWER UNIT (Fig.6)

• Remove the REAR COVER. (1) Disconnect the connector [CN805

[CN8009 UNIT .

(2) Remove the 8 screws [P], then remove the MAIN POWER

UNIT.

3.2.10 REMOVING THE SUB POWER PWB (Fig.6)

• Remove the REAR COVER. (1) Disconnect the connector [CN9001

from the SUB POWER PWB .

(2) Remove the 4 screws [Q], then remove the SUB POWER

PWB.

3.2.11 REMOVING THE COOLING FAN (Fig.6)

• Remove the REAR COVER. (1) Disconnect the connector [CN0FL

DISPLAY INTERFACE PWB .

(2) Remove the 4 screws [R], then remove the COOLING FAN

BRACKET by lifting upward.

(3) Remove the 4 screws [S], then remove the COOLING FAN

by pulling in hte arrowed direction.

3.2.12 REMOVING THE POWER CHASSIS BASE (Fig.6)

• Remove the REAR COVER.

• Remove the MAIN POWER UNIT.

• Remove the SUB POWER PWB.

• Remove the COOLING FAN. (1) Remove the 5 screws [T], then remove the POWER

CHASSIS BASE.

3.2.13 REMOVING THE DISPLAY SWITCH PWB (Fig.6)

• Remove the BACK COVER.

• Remove the SPEAKER HOLDER. (1) Remove the 2 screws [U] and the 3 screws [V], then

remove the DISPLAY SWITCH PWB and CONTROL KNOB.

(2) Disconnect the connector [CN000T

SWITCH PWB .

] / [CN8011] / [CN9001] from the MAIN POWER

] from the TEMP.

] / [CN806] / [CN8001] /

] / [CN9002] / [CN9005]

] / [CN0FR] from the

] from the DISPLAY

3.2.14 REMOVING THE DISPLAY LED PWB (Fig.6)

• Remove the BACK COVER.

• Remove the SPEAKER HOLDER.

• Remove the DISPLAY SWITCH PWB. (1) Remove the 2 screws [W], then remove the DISPLAY LED

PWB.

(2) Disconnect the connector [CN000X

LED PWB .

3.2.15 REMOVING THE DD SPEAKER (Fig.6)

• Remove the REAR COVER.

• Remove the BACK COVER.

• Remove the SPEAKER HOLDER. (1) Disconnect the connector [CN60SR

AUDIO PWB .

(2) Remove the 4 screws [X], then remove the DD SPEAKER.

3.2.16 REMOVING THE WOOFER SPEAKER (Fig.6)

• Remove the REAR COVER. (1) Disconnect the connector [CN60CB

PWB.

(2) Remove the 6 screws [Y], then remove the WOOFER

SPEAKER UNIT. (3) Remove the 8 screws [Z], then remove the DUCT COVER. (4) Remove the 10 screws [a] and the 4 screws [b], then

remove the WOOFER BACK COVER. (5) Remove the 8 screws [c], then remove the WOOFER

SPEAKER.

3.2.17 REMOVING THE PDP (PANEL) UNIT (Fig.6)

• Remove the REAR COVER.

• Remove the CHASSIS SHIELD BRACKET.

• Remove the TERMINAL COVER.

• Remove the CHASSIS BASE (with each PWB affixed on the CHASSIS BASE).

• Remove the POWER CHASSIS BASE (with each PWB affixed on the CHASSIS BASE).

• Remove the TEMP. SENSOR. (1) Remove the 16 screws [d], then remove the BACK

BRACKET.

(2) Remove the 4 screws [e] then Lift the PDP straight upward

and remove it with extra attention no to impose any shock to the PDP.

CAUTION:

• More than two people are required to remove the PDP unit.

• The gas pouring port is covered with the protection material.

Durring the operation, be careful not to damage the gas pouring port.

• Do not touch the front side (glass) of the PDP with your

fingers.

] from the DISPLAY

] / [CN60SL] from the

] from the AUDIO

(No.YA100)1-19

Page 20

SUB POWER PWB

BACK BRACKET

GAS insertion

hole

INSULATOR

PDP UNIT

TEMP. SENSOR PWB

FAN BRACKET

FAN

CHASSIS BASE

MAIN POWER UNIT

FAN

BRACKET

COOLING FAN

BACK BRACKET

DD SPEAKER

DISPLAY SWITCH PWB

CONTROL KNOB

INSULATOR

TOP

DD SPEAKER

DISPLAY LED PWB

DUCT COVER

WOOFER BACK COVER

WOOFER SPEAKER

1-20 (No.YA100)

Fig.6

Page 21

3.2.18 REMOVING THE PWB IN PDP UNIT

3.2.18.1 REMOVING THE X-LEFT-TOP PWB (Fig.7)

• Remove the PDP UNIT. (1) Disconnect the connector [P4

] / [P5] / [P501] / [P502] /

[P503] / [P504] from the X-LEFT TOP PWB .

(2) Remove the 2 screws [f] and the 1 screw [g], then remove

the X-LEFT-TOP PWB.

3.2.18.2 REMOVING THE X-CENTER-TOP PWB (Fig.7)

• Remove the PDP UNIT. (1)

Disconnect the connector [P5] / [P6] / [ / [

P506

] / [

P507

] / [

P508

] from the X-CENTER TOP PWB .

P10

] / [

P100

] / [

(2) Remove the 1 screw [f] and the 2 screws [h], then remove

the X-CENTER-TOP PWB.

3.2.18.3 REMOVING THE X-RIGHT-TOP PWB (Fig.7)

• Remove the PDP UNIT. (1) Disconnect the connectors [P1

] / [P511] from the X-RIGHT TOP PWB .

[P510

(2)

Remove the 2 screws

[i]

, then remove the X-RIGHT-TOP PWB

] / [P4] / [P5] / [P6] / [P509] /

3.2.18.4 REMOVING THE Z-SUS PWB (Fig.7)

• Remove the PDP UNIT. (1) Disconnect the connectors [P1

] / [P12] from the Z-SUS PWB .

[P9

] / [P2] / [P3] / [P5] / [P6] /

(2) Remove the 9 screws [j], then remove the Z-SUS PWB.

3.2.18.5 REMOVING THE DC/DC PWB (Fig.7)

• Remove the PDP UNIT. (1) Disconnect the connectors [P21

[P25

] / [P26] from the DC/DC PWB .

] / [P22] / [P23] / [P24] /

(2) Remove the 4 screws [k], then remove the DC/DC PWB.

3.2.18.6 REMOVING THE LVDS CONTROL PWB (Fig.7)

• Remove the PDP UNIT. (1) Disconnect the connectors [P2

[P103

] / [P104] / [P105] / [P106] / [P200] / [P201] / [P300]

] / [P3] / [P101] / [P102] /

from the LVDS CONTROL PWB .

(2) Remove the 4 screws [m], then remove the LVDS

CONTROL PWB.

3.2.18.7 REMOVING THE TEMP. SENSOR PWB (Fig.7)

• Remove the PDP UNIT. (1)

Disconnect the connectors [P3] from the LVDS CONTROL PWB.

(2) Remove the 2 screws [n], then remove the TEMP.

SENSOR PWB.

X-CENTERTOP PWB

DC/DC PWB

P505

3.2.18.8 REMOVING THE Y-SUS PWB (Fig.7)

• Remove the PDP UNIT. (1) Disconnect the connectors [P2

[P7

] / [P8] / [P9] / [P10] / [P11] from the Y-SUS PWB .

] / [P3] / [P4] / [P5] / [P6] /

(2) Remove the 8 screws [o], then remove the Y-SUS PWB.

3.2.18.9 REMOVING THE Y-DRIVE-UPPER PWB (Fig.7)

• Remove the PDP UNIT. (1)

Disconnect the connectors [P9] / [

]

(2) Disconnect the connector [P7] / [P8] / [P9] / [P10] / [P12] /

[P13

] from the Y-DRIVE UPPER PWB .

P10

] from the Y-SUB PWB .

(3) Remove the 2 screws [p], then remove the Y-DRIVE-

UPPER PWB.

3.2.18.10 REMOVING THE Y-DRIVE-LOWER PWB (Fig.7)

• Remove the PDP UNIT. (1)

Disconnect the connector [P2] / [

P10

] from the Y-SUB PWB .

(2) Disconnect the connector [P1] / [P2] / [P3] / [P4] / [P5] /

[P11

] from the Y-DRIVE LOWER PWB .

(3) Remove the 2 screws [q], then remove the Y-DRIVE-

LOWER PWB.

3.2.18.11 REMOVING THE X-RIGHT-BOTTOM PWB (Fig.7)

• Remove the PDP UNIT. (1) Disconnect the connector [P2] / [P3] /[P7] / [P401] / [P402]

/ [P403

] from the X-RIGHT BOTTOM PWB .

(2) Remove the 2 screws [r], then remove the X-RIGHT-

BOTTOM PWB.

3.2.18.12 REMOVING THE X-CENTER-BOTTOM PWB (Fig.7)

• Remove the PDP UNIT. (1)

Disconnect the connectors [P1] / [P4] / [P7] / [ / [

P407

] / [

P408

] / [

P425

] from the X-CENTER BOTTOM

PWB.

(2) Remove the 2 screws [s] and the 1screw [t], then remove

the X-CENTER-BOTTOM PWB.

3.2.18.13 REMOVING THE X-LEFT-BOTTOM PWB (Fig.7)

• Remove the PDP UNIT. (1) Disconnect the connectors [P1

[P403

] / [P404] from the X-LEFT-BOTTOM PWB .

] / [P2] / [P401] / [P402] /

(2) Remove the 1 screw [t] and the 2 screws [u], then remove

the X-LEFT BOTTOM PWB.

X-RIGHTTOP PWB

Z-SUS PWB

X-RIGHTBOTTOM PWB

P405

] / [

P406

]

X-LEFTTOP PWB

X-CENTERBOTTOM PWB

-DRIVER-

UPPER PWB

Y-SUS PWB

Y-DRIVERLOWER PWB

X-LEFTBOTTOM PWB

TEMP SENSOR PWB

LVDS

CONTROL PWB

Fig.7

(No.YA100)1-21

Page 22

3.2.19 REMOVING THE FRONT FILTER (Fig.8)

• Remove the REAR COVER.

• Remove the CHASSIS SHIELD BRACKET.

• Remove the TERMINAL COVER.

• Remove the CHASSIS BASE (with each PWB affixed on the CHASSIS BASE).

• Remove the POWER CHASSIS BASE (with each PWB affixed on the CHASSIS BASE).

• Remove the TEMP. SENSOR.

• Remove the PDP UNIT. (1) Remove the 12 screws [v], then remove the GLASS

HOLDER.

(2) Remove the FRONT FILTER with enough care not to

damage it.

3.2.20 REMOVING THE TOP FRAME BRACKET, BOTTOM FRAME BRACKET AND SIDE FRAME BRACKET (Fig.8)

• Remove the REAR COVER.

• Remove the CHASSIS SHIELD BRACKET.

• Remove the TERMINAL COVER.

• Remove the CHASSIS BASE (with each PWB affixed on the

CHASSIS BASE).

• Remove the POWER CHASSIS BASE (with each PWB affixed

on the CHASSIS BASE).

• Remove the TEMP. SENSOR.

• Remove the PDP UNIT.

• Remove the FRONT FILTER.

Remove the 6 screws

(1)

[w], then remove

the FRONT PANEL. (2) Remove the 8 screws [x], then remove the SPACER. (3) Remove the 4 screws [y], then remove the TOP FLAME

BRACKET, BOTTOM FLAME BRACKET and SIDE FLAME BRACKET.

GLASS HOLDER

SPACER

SIDE FRAME BRACKET

TOP FRAME BRACKET

SIDE FRAME BRACKET

BOTTOM FRAME BRACKET

FRONT FILTER

1-22 (No.YA100)

TOP

FRONT PAN EL

Fig.8

Page 23

3.3 DISASSEMBLY PROCEDURE [RECEIVER UNIT]

NOTE:

• Make sure that the power cord is disconnected from the outlet.

• Pay special attention not to break or damage the parts.

• When removing each board, remove the connectors as required. Taking notes of the connecting points (connector numbers) makes service procedure manageable.

• Make sure that there is no bent or stain on the connectors before inserting, and firmly insert the connectors.

3.3.1 REMOVING THE TOP COVER

(1) Remove the 9 screws [A] then remove the TOP COVER.

3.3.2 REMOVING THE FRONT PANEL

• Remove the TOP COVER. (1) Remove the 1 screw [B] and the 1 screw [C]. (2) Remove the 3 claws [D] and the 2 claws [E]. (3) Remove the FRONT PANEL toward you.

3.3.3 REMOVING THE FRONT CONTROL PWB

• Remove the TOP COVER.

• Remove the FRONT PANEL. (1) Remove the [CN800F]

PWB.

(2) Remove the 4 screws [F], then remove the FRONT

CONTROL PWB.

3.3.4 REMOVING THE REAR COVER

• Remove the TOP COVER. (1) Remove the 12 screws [G], the 2 nats [H], the 2 washers

[J], the 2 screws [K], the 2 screws [L], the 2 screws [M] and the 1 screw [N].

(2) Remove the REAR COVER toward you.

3.3.5 REMOVING THE COOLING FAN

• Remove the TOP COVER. (1) Remove the [CN00Q]

PWB.

(2) Remove the 2 screws [O], then remove the FAN

BRACKET.

(3) Remove the 1 screw [P], then remove the COOLING FAN.

3.3.6 REMOVING THE ATSC TUNER MODULE

• Remove the TOP COVER.

• Remove the REAR COVER. (1) Remove the [CN1302]

the ATSC TUNER MODULE.

(2) Remove the 5 screws [Q], then remove the ATSC TUNER

MODULE.

3.3.7 REMOVING THE SD CARD PWB

• Remove the TOP COVER.

• Remove the FRONT PANEL.

• Remove the COOLING FAN. (1) Remove the [CN1001] (2) Remove the 3 screws [R], then remove the SD CARD

PWB.

3.3.8 REMOVING THE RECEIVER PWB

• Remove the TOP COVER.

• Remove the REAR COVER. (1) Remove the [CN00A]

RECEIVER PWB.

(2) Remove the RECEIVER PWB.

connector on the ANALOG SIGNAL

connector on the SYSTEM POWER

/ [CN1502] / [CN9601] connector on

connectors on the SD CARD PWB.

/ [CN00T] connectors on the

3.3.9 REMOVING THE REAR JACK PWB

• Remove the TOP COVER.

• Remove the REAR COVER. (1) Remove the [CNJ0J1]

ANLOG SIGNAL PWB.

(2) Remove the 2 screws [S], then remove the REAR JACK

PWB.

3.3.10 REMOVING THE DIGITAL SIGNAL PWB

• Remove the TOP COVER.

• Remove the REAR COVER.

• Remove the ATSC TUNER UNIT. (1) Remove the [CN001]

SIGNAL PWB.

(2) Remove the [CN003]

PWB.

(3) Remove the 4 screws [T], then remove the DIGITAL

HOLDER.

(4) Remove the 3 screws [U], then remove the DIGITAL

SIGNAL PWB.

3.3.11 REMOVING THE REGULATOR PWB

• Remove the TOP COVER.

• Remove the FRONT PANEL.

• Remove the COOLING FAN.

• Remove the SD CARD2 PWB. (1) Remove the [CN003]

REGULATOR PWB.

(2) Remove the 4 screws [V], then remove the REGULATOR

PWB.

3.3.12 REMOVING THE SYSTEM POWER PWB

• Remove the TOP COVER. (1) Remove the [CN00G]

PWB.

(2) Remove the [CN008] connector on the REGULATOR

PWB.

(3) Remove the [CN9601

UNIT.

(4) Remove the [CN00Q]

TEM POWER PWB.

(5) Remove the 7 screws [W], then remove the SYSTEM

POWER PWB.

3.3.13 REMOVING THE ANALOG SIGNAL PWB

• Remove the TOP COVER.

• Remove the REAR COVER.

• Remove the RECEIVER PWB. (1) Remove the [CN001]

[CN00G SIGNAL PWB.

(2) Remove the 2 screws [X], then remove the ANALOG

SIGNAL PWB.

] / [CNJ0J1] / [CNJ0J2] connector on the ANALOG

/ [CNJ0J2] connectors on the

/ [CN002] connectors on the ANLOG

connector on the REGULATOR

/ [CN008] / [CN00D] connector on the

connector on the ANLOG SIGNAL

] connector on the ATSC TUNER

/ [CN0PW] connector on the SYS-

/ [CN002] / [CN00D] / [CN00F] /

(No.YA100)1-23

Page 24

TOP COVER

COOLING FAN

FRONT PAN EL

FAN BRACKET

DIGITAL SIGNAL PWB

SD CARD PWB

DIGITAL HOLDER

REGULATOR PWB

INSULATOR

ATSC TUNER MODULE

SYSTEM POWER PWB

RECEIVER PWB

ANALOG SIGNAL PWB

REAR JACK PWB

FRONT CONTROL PWB

CHASSIS BASE

BOTTOM CASE

BACK COVER

Fig.9

1-24 (No.YA100)

Page 25

3.4 MEMORY IC REPLACEMENT

S001 PREPARE 000 NTSC3 1409 DYN H

SERVICE MENU

1.ADJUST

2.SELF_CHK

3.I2C STOP

• This model uses the memory IC.

• This memory IC stores data for proper operation of the video and drive circuits.

• When replacing, be sure to use an IC containing this (initial value) data.

3.4.1 MEMORY IC REPLACEMENT PROCEDURE

1. Power off

Switch off the power and disconnect the power plug from the AC outlet.

2. Replace the memory IC

Be sure to use the memory IC written with the initial setting values.

3. Power on

Connect the power plug to the AC outlet and switch on the power.

4. Receiving channel setting

Refer to the OPERATING INSTRUCTIONS and set the receive channels (Channels Preset) as described.

5. User setting

Check the user setting items according to the given in page later. Where these do not agree, refer to the OPERATING INSTRUCTIONS and set the items as described.

6. SERVICE MODE setting

Verify what to set in the SERVICE MODE, and set whatever is necessary (Fig.1). Refer to the SERVICE ADJUSTMENT for setting.

3.4.2 SERVICE MODE SETTING

SERVICE MODE SCREEN

MAIN MENU SCREEN

SERVICE MENU

1.ADJUST

2.SELF_CHK

3.I2C STOP

SETTING ITEM

Setting items Settings Item No.

Video system setting Adjust S001 - S039

Audio system setting Adjust T001 - T010

Panel control system setting Fixed P001 - P010

Drive system setting Fixed D001 - D187

Main cpu system setting Fixed Z001 - Z010

ADJUSTMENT MODE SCREEN

S001 PREPARE 000 NTSC3 1409 DYN H

Fig.1

(No.YA100)1-25

Page 26

3.4.3 SETTINGS OF FACTORY SHIPMENT

3.4.3.1 BUTTON OPERATION [DISPLAY UNIT] 3.4.3.2 REMOTE CONTROL DIRECT OPERATION

Setting item Setting position

POWER Off

CHANNEL CABLE-02

VOLUME 10

INPUT TV

INPUT TV CHANNEL CABLE-02 VOLUME 10 MUTING OFF DISPLAY OFF ASPECT NTSC PANORAMA

MULTI SCREEN 1 SCREEN SLEEP TIMER OFF CLOSED CAPTION OFF THEATER PRO OFF NATURAL CINEMA AUTO VIDEO STATUS DYNAMIC MTS STEREO SOUND

EFFECT

Setting item Setting position

HD FULL

A.H.S OFF BBE ON SMART SOUND OFF A.H.B ON

3.4.3.3 REMOTE CONTROL MENU OPERATION

1. PICTURE ADJUST

Customers can adjust the picture setting of menu screen as their own like but the picture standard value during factory shipment is as below.

< NTSC MODE >

Setting item

PICTURE +12 00 -05 00 BRIGHT 00 00 00 00 COLOR +08 00 -03 00 TINT 00 00 -05 00 DETAIL +05 00 -03 00 COLOR TEMPERATURE DIG. NOISE CLEAR OFF OFF OFF OFF NATURAL CINEMA AUTO AUTO AUTO AUTO COLOR MANAGEMENT DYNAMIC GAMMA ON ON ON ON

< HD MODE >

Setting item

PICTURE +12 00 -05 00 BRIGHT 00 00 00 00 COLOR +08 00 -03 00 TINT 00 00 00 00 DETAIL +05 00 -03 00 COLOR TEMPERATURE DIG. NOISE CLEAR OFF OFF OFF OFF NATURAL CINEMA AUTO AUTO AUTO AUTO COLOR MANAGEMENT DYNAMIC GAMMA ON ON ON ON

DYNAMIC

HIGH LOW HIGH HIGH

DYNAMIC

HIGH LOW HIGH LOW

STANDARD

ON ON ON ON

STANDARD

ON ON ON ON

GAME

THEATER

2. SOUND ADJUST

Setting item Setting position

BASS 00 TREBLE 00 BALANCE 00 MTS STEREO

3. CLOCK / TIMERS

Setting item Setting position

ON / OFF TIMER OFF

4. INITIAL SETUP

Setting item Setting position

VIDEO-1 MONITOR OUT OFF TV SPEAKER ON AUDIO OUT FIX DIGITAL-IN DIGITAL-IN AUDIO CENTER CH INPUT NOISE MUTING ON FRONT PANEL LOCK OFF V1 SMART INPUT OFF VIDEO INPUT LABEL All blank POSITION ADJUSTMENT Center POWER INDICATOR HIGH LANGUAGE ENG. CLOSED CAPTION OFF AUTO SHUT OFF OFF XDS ID ON V-CHIP OFF AUTO DEMO OFF

SIZE 1 DIGITAL OFF

1-26 (No.YA100)

Page 27

3.5 REPLACEMENT OF CHIP COMPONENT

3.5.1 CAUTIONS

(1) Avoid heating for more than 3 seconds. (2) Do not rub the electrodes and the resist parts of the pattern. (3) When removing a chip part, melt the solder adequately. (4) Do not reuse a chip part after removing it.

3.5.2 SOLDERING IRON

(1) Use a high insulation soldering iron with a thin pointed end of it. (2) A 30w soldering iron is recommended for easily removing parts.

3.5.3 REPLACEMENT STEPS

1. How to remove Chip parts

2. How to install Chip parts

[Resistors, capacitors, etc.]

(1) As shown in the figure, push the part with tweezers and

alternately melt the solder at each end.

(2) Shift with the tweezers and remove the chip part.

[Transistors, diodes, variable resistors, etc.]

(1) Apply extra solder to each lead.

SOLDER

[Resistors, capacitors, etc.]

(1) Apply solder to the pattern as indicated in the figure.

(2) Grasp the chip part with tweezers and place it on the

solder. Then heat and melt the solder at both ends of the chip part.

[Transistors, diodes, variable resistors, etc.]

(1) Apply solder to the pattern as indicated in the figure. (2) Grasp the chip part with tweezers and place it on the

solder.

(3) First solder lead A as indicated in the figure.

(2) As shown in the figure, push the part with tweezers and

alternately melt the solder at each lead. Shift and remove the chip part.

NOTE :

After removing the part, remove remaining solder from the pattern.

(4) Then solder leads B and C.

(No.YA100)1-27

Page 28

SECTION 4

SERVICE MENU

1.ADJUST

2.SELF_CHK

3.I2C STOP

S001 PREPARE 000 NTSC3 1409 DYN H

ADJUSTMENT

4.1 ADJUSTMENT PREPARATION

(1) There are 2 ways of adjusting this TV : One is with the

REMOTE CONTROL UNIT and the other is the conventional method using adjustment parts and components.

(2) The adjustment using the REMOTE CONTROL UNIT is

made on the basis of the initial setting values. The setting values which adjust the screen to the optimum condition can be different from the initial setting values.

(3) Make sure that connection is correctly made AC to AC

power source.

(4) Turn on the power of the TV and measuring instruments for

warning up for at least 30 minutes before starting adjustments.

(5) If the receive or input signal is not specified, use the most

appropriate signal for adjustment.

(6) Never touch the parts (such as variable resistors,

transformers and condensers) not shown in the adjustment items of this service adjustment.

4.2 PRESET SETTING BEFORE ADJUSTMENTS

Unless otherwise specified in the adjustment items, preset the following functions with the REMOTE CONTROL UNIT.

Setting item Settings

VIDEO STATUS STANDARD

BRIGHT / CONTRAST / COLOR / TINT

COLOR TEMPERATURE LOW

DIG. NOISE CLEAR OFF

COLOR MANAGEMENT ON

DYNAMIC GAMMA ON

NATURAL CINEMA AUTO

TREBLE / BASS / BALANCE 00

BBE ON

A.H.S OFF

A.H.B ON

MTS STEREO

SMART SOUND OFF

AUDIO OUT FIX

ASPECT FULL

4.3 MEASURING INSTRUMENT AND FIXTURES

• Oscilloscope

• Signal generator (Pattern generator) [NTSC / 525i / 1125i]

• TV audio multiplex signal generator

• Remote control unit

4.4 ADJUSTMENT ITEMS

 POWER CIRCUIT [DISPLAY UNIT: PD-42X795]

• PDP POWER VOLTAGE adjustment

 POWER CIRCUIT [DISPLAY UNIT: PD-50X795]

• PDP POWER VOLTAGE adjustment

 VIDEO CIRCUIT [RECEIVER UNIT]

• 525i A-D OFFSET adjustment

• 1125i BRIGHTNESS adjustment

• 1125i A-D OFFSET adjustment

• SUB SCREEN A-D OFFSET adjustment

• WHITE BALANCE (HIGHLIGHT) adjustment

 MTS CIRCUIT [RECEIVER UNIT]

• MTS INPUT LEVEL adjustment

• MTS SEPARATION adjustment

4.5 BASIC OPERATION OF SERVICE MODE

4.5.1 HOW TO ENTER THE SERVICE MODE

(1) Set to 0 minutes using the [SLEEP TIMER] key. (2) Press the [VIDEO STATUS] key and [DISPLAY] key

simultaneously, then enter the SERVICE MODE.

(3) When the MAIN MENU SCREEN is displayed, press [1]

key to enter the adjustment mode.

NOTE:

• Before entering the SERVICE MODE, confirm that the setting of TV / CATV switch of the REMOTE CONTROL UNIT is at the "TV" side and the setting of VCR / DVD switch is at the "VCR" side. If the switches have not been properly set, you cannot enter the SERVICE MODE.

• When a number key other than the [1] to [3] key is pressed in the MAIN MENU SCREEN, the other relevant screen may be displayed. This is not used in the adjustment procedure. Press the [MENU] key to return to the MAIN MENU SCREEN.

MAIN MENU SCREEN

SERVICE MENU

1.ADJUST

2.SELF_CHK

3.I2C STOP

ADJUSTMENT MODE SCREEN

S001 PREPARE 000 NTSC3 1409 DYN H

1-28 (No.YA100)

4.5.2 HOW TO EXIT THE SERVICE MODE

Press the [ MENU ] key to exit the Service mode.

Page 29

4.5.3 DESCRIPTION OF STATUS DISPLAY

S001 PREPARE 000 NTSC3 1409 DYN H

SETTING VALUE (DATA)SETTINGITEM No. SETTING ITEM

COLOR TEMP.

Setting item numbers are displayed. For the setting item names to be displayed, refer to "Initial setting value of adjustment mode".

S001 PREPARE 000 NTSC3 1409 DYN H

SIGNAL SYSTEM

SCREEN MODE

VIDEO STATUS

(1) SIGNAL SYSTEM

The signal displayed on the screen is displayed.

NTSC3 : 525i (Composite / S-video input) 525I : 525i (Component input) 525P : 525p 1125I6 : 1125i 750P : 750p H525I : HDMI 525i H525P : HDMI 525p H125I6 : HDMI 1125i H750P : HDMI 750p PCVGA : PC (VGA) PCXGA : PC (XGA)

(2) SCREEN MODE

State of the SCREEN SIZE or MULTI PICTURE is displayed.

SINGLE SCREEN

1409 : FULL 1609 : PANORAMA, HD PANORAMA 1609S : CINEMA, CINEMA ZOOM FULL : REGULAR

MULTI SCREEN

M12 : FREEZE screen FRZ : TWIN screen STD : INDEX screen

(3) VIDEO STATUS

STD : STANDARD DYN : DYNAMIC TH : THEATER GAME : GAME

(7) SETTING VALUE (DATA)

The SETTING VALUE is displayed.

4.5.4 CHANGE AND MEMORY OF SETTING VALUE

SELECTION OF SETTING ITEM

• [CHANNEL (+/-)] key. For scrolling up / down the setting items.

S001... ↔ T001... ↔ P001... ↔ D001... ↔ Z001...

• [SLEEP TIMER] key. For switching to next items.

S001 → T001 → P001 → D001 → Z001

CHANGE OF SETTING VALUE (DATA)

• [VOLUME (+/-)] key. For scrolling up / down the setting values.

MEMORY OF SETTING VALUE (DATA)

Changed setting value is memorized by pressing [MUTING] key.

4.5.5 SERVICE MODE SELECT KEY LOCATION

VCR/DVD switch

TV/CATV switch

VIDEO STATUS

MUTING

VOLUME -

POWER

SLEEP TIMER DISPLAY

NUMBER

CHANNEL +

VOLUME +

BACK

CHANNEL -

(4) COLOR TEMP.

H : HIGH M: LOW

(5) SETTING ITEM NAME

Setting item name are displayed. The setting item numbers to be displayed are listed below.

Item No. Setting item S001 - S039 Video system setting T001 - T010 Audio system setting P001 - P010 Panel control system setting D001 - D187 Drive system setting Z001 - Z010 Main CPU system setting

(6) SETTING ITEM NO.

(No.YA100)1-29

Page 30

4.6 INITIAL SETTING VALUES IN THE SERVICE MODE

• Perform fine-tuning based on the "initial values" using the remote control when in the Service mode.

• The "initial values" serve only as an indication rough standard and therefore the values with which optimal display can be achieved may be different from the default values. But, don't change the values that are not written in "ADJUSTMENT PROCEDURE". They are fixed values.

4.6.1 VIDEO SYSTEM SETTING 4.6.2 AUDIO SYSTEM SETTING

Item No. Item name Variable range Setting value

S001 PREPARE 000 - 031 000

S002 NTSC BL 000 - 015 000

S003 NTSC CNT 000 - 255 033

S004 NT CR OF 000 - 015 006

S005 NT CB OF 000 - 015 006

S006 525i BL 000 - 015 000

S007 525i CNT 000 - 255 033

S008 5i CB OF 000 - 015 000

S009 5i CR OF 000 - 015 000

S010 5i CR GN 000 - 015 006

S011 5i CB GN 000 - 015 006

S012 HD BL 000 - 063 057

S013 HD CB OF 000 - 063 058

S014 HD CR OF 000 - 063 060

S015 RT CONT 000 - 015 007

S016 RT CB OF 000 - 015 005

S017 RT CR OF 000 - 015 007

S018 RT CL GA 000 - 015 004

S019 PC CL MB 000 - 007 000

S020 PC CL LB 000 - 031 000

S021 PC CL MR 000 - 071 000

S022 PC CL LR 000 - 031 000

S023 (Not display) 000 - 255 000

S024 (Not display) 000 - 255 000

S025 (Not display) 000 - 255 000

S026 (Not display) 000 - 255 000

S027 (Not display) 000 - 255 000

S028 (Not display) 000 - 255 000

S029 (Not display) 000 - 255 000

S030 R DRIVE 000 - 255 143

S031 G DRIVE 000 - 255 133

S032 B DRIVE 000 - 255 140

S033 (Not display) 000 - 255 000

S034 (Not display) 000 - 255 000

S035 (Not display) 000 - 255 000

S036 (Not display) 000 - 255 000

S037 (Not display) 000 - 255 000

S038 (Not display) 000 - 255 000

S039 ILA COM 000 - 001 000

Item No. Item name Variable range Setting value

T001 IN LEVEL 000 - 255 010

T002 LOW SEP 000 - 255 030

T003 HIGH SEP 000 - 255 019

T004 AFC -128 - +127 +00

T005 (Not display) 00 - FF 00

T006 ATT V ON 000 - 001 000

T007 ATT U ON 000 - 001 000

T008 ATT C ON 000 - 001 000

T009 (Not display) 000 - 255 000

T010 (Not display) 000 - 255 000

4.6.3 PANEL CONTOROL SYSTEM SETTING (*Fixed values)

Item No. Item name Variable range Setting value

P001 TM HOR H 00 - FF 02

P002 TM HOR L 00 - FF 59

P003 TM MIN 00 - FF 20

P004 TEMP0 000 - 255 000

P005 (Not display) 000 - 255 000

P006 (Not display) 000 - 255 000

P007 (Not display) 000 - 255 000

P008 (Not display) 000 - 255 000

P009 (Not display) 000 - 255 000

P010 (Not display) 000 - 255 000

4.6.4 DRIVE SYSTEM SETTING (*Fixed values)

Item No. Item name Variable range Setting value

D001 SLV GN 00 - 3F 20

D002 SLVH GN 00 - 3F 20

D003 SLH GN 00 - 3F 20

D004 SLV Pf 00 - 03 01

D005 SLH Pf H 00 - 01 01

D006 SLH Pf L 00 - 03 01

D007 SL EGCON 00 - 3F 04

D008 SL EGONF 00 - 01 01

D009 SL CRGON 00 - 3F 05

D010 SL CRGON 00 - 01 01

D011 SL ON OF 00 - 01 01

D012 SV GN 00 - 3F 20

D013 SVH GN 00 - 3F 18

D014 SH GN 00 - 3F 25

D015 SV Pf 00 - 03 01

D016 SV PfH 00 - 01 01

D017 SV PfL 00 - 03 01

D018 SYL CON 00 - 3F 30

D019 SYL CONF 00 - 01 01

1-30 (No.YA100)

Page 31

Item No. Item name Variable range Setting value

D020 SYH CON 00 - 3F 18

D021 SYH CONF 00 - 01 01

D022 SC CON 00 - 3F 36

D023 SC CNONF 00 - 01 01

D024 SPM BLC 00 - 3F 08

D025 SPM BLCO 00 - 01 01

D026 SLIM 00 - 3F 30

D027 SLIMONF 00 - 01 01

D028 SCRG 00 - 3F 06

D029 SRGONF 00 - 01 01

D030 S ONF 00 - 01 01

D031 pb GN 00 - 3F 15

D032 pb PfH 00 - 01 00

D033 pb PfL 00 - 03 03

D034 pb CRG 00 - 3F 04

D035 pb CRGON 00 - 01 01

D036 pb ONF 00 - 01 01

D037 pr GN 00 - 3F 15

D038 pr PfH 00 - 01 00

D039 pr PfL 00 - 03 03

D040 pr CRG 00 - 3F 04

D041 pr CRGON 00 - 01 00

D042 pr ONF 00 - 01 01

D043 ENH ONF 00 - 01 01

D044 (Not display) 00 - FF 00

D045 (Not display) 00 - FF 00

D046 (Not display) 00 - FF 00

D047 (Not display) 00 - FF 00

D048 (Not display) 00 - FF 00

D049 (Not display) 00 - FF 00

D050 (Not display) 00 - FF 00

D051 (Not display) 00 - FF 00

D052 (Not display) 00 - FF 00

D053 (Not display) 00 - FF 00

D054 (Not display) 00 - FF 00

D055 (Not display) 00 - FF 00

D056 (Not display) 00 - FF 00

D057 (Not display) 00 - FF 00

D058 (Not display) 00 - FF 00

D059 (Not display) 00 - FF 00

D060 (Not display) 00 - FF 00

D061 (Not display) 00 - FF 00

D062 (Not display) 00 - FF 00

D063 (Not display) 00 - FF 00

D064 (Not display) 00 - FF 00

D065 (Not display) 00 - FF 00

D066 (Not display) 00 - FF 00

D067 (Not display) 00 - FF 00

D068 (Not display) 00 - FF 00

D069 (Not display) 00 - FF 00

Item No. Item name Variable range Setting value

D070 (Not display) 00 - FF 00

D071 (Not display) 00 - FF 00

D072 (Not display) 00 - FF 00

D073 (Not display) 00 - FF 00

D074 (Not display) 00 - FF 00

D075 (Not display) 00 - FF 00

D076 (Not display) 00 - FF 00

D077 (Not display) 00 - FF 00

D078 (Not display) 00 - FF 00

D079 (Not display) 00 - FF 00

D080 (Not display) 00 - FF 00

D081 (Not display) 00 - FF 00

D082 (Not display) 00 - FF 00

D083 (Not display) 00 - FF 00

D084 (Not display) 00 - FF 00

D085 (Not display) 00 - FF 00

D086 (Not display) 00 - FF 00

D087 (Not display) 00 - FF 00

D088 (Not display) 00 - FF 00

D089 (Not display) 00 - FF 00

D090 (Not display) 00 - FF 00

D091 (Not display) 00 - FF 00

D092 (Not display) 00 - FF 00

D093 (Not display) 00 - FF 00

D094 (Not display) 00 - FF 00

D095 (Not display) 00 - FF 00

D096 (Not display) 00 - FF 00

D097 (Not display) 00 - FF 00

D098 (Not display) 00 - FF 00

D099 (Not display) 00 - FF 00

D101 (Not display) 00 - FF 00

D102 (Not display) 00 - FF 00

D103 (Not display) 00 - FF 00

D104 (Not display) 00 - FF 00

D105 (Not display) 00 - FF 00

D106 (Not display) 00 - FF 00

D107 (Not display) 00 - FF 00

D108 (Not display) 00 - FF 00

D109 (Not display) 00 - FF 00

D110 (Not display) 00 - FF 00

D111 (Not display) 00 - FF 00

D112 (Not display) 00 - FF 00

D113 (Not display) 00 - FF 00

D114 (Not display) 00 - FF 00

D115 (Not display) 00 - FF 00

D116 (Not display) 00 - FF 00

D117 (Not display) 00 - FF 00

D118 (Not display) 00 - FF 00

D119 (Not display) 00 - FF 00

D120 (Not display) 00 - FF 00

(No.YA100)1-31

Page 32

Item No. Item name Variable range Setting value

D121 (Not display) 00 - FF 00

D122 (Not display) 00 - FF 00

D123 (Not display) 00 - FF 00

D124 (Not display) 00 - FF 00

D125 (Not display) 00 - FF 00

D126 (Not display) 00 - FF 00

D127 (Not display) 00 - FF 00

D128 (Not display) 00 - FF 00

D129 (Not display) 00 - FF 00

D130 (Not display) 00 - FF 00

D131 (Not display) 00 - FF 00

D132 (Not display) 00 - FF 00

D133 (Not display) 00 - FF 00

D134 (Not display) 00 - FF 00

D135 (Not display) 00 - FF 00

D136 (Not display) 00 - FF 00

D137 (Not display) 00 - FF 00

D138 (Not display) 00 - FF 00

D139 (Not display) 00 - FF 00

D140 (Not display) 00 - FF 00

D141 (Not display) 00 - FF 00

D142 (Not display) 00 - FF 00

D143 (Not display) 00 - FF 00

D144 (Not display) 00 - FF 00

D145 (Not display) 00 - FF 00

D146 (Not display) 00 - FF 00

D147 (Not display) 00 - FF 00

D148 (Not display) 00 - FF 00

D149 (Not display) 00 - FF 00

D150 (Not display) 00 - FF 00

D151 (Not display) 00 - FF 00

D152 (Not display) 00 - FF 00

D153 (Not display) 00 - FF 00

D154 (Not display) 00 - FF 00

D155 (Not display) 00 - FF 00

D156 (Not display) 00 - FF 00

D157 (Not display) 00 - FF 00

D158 (Not display) 00 - FF 00

D159 (Not display) 00 - FF 00

D160 (Not display) 00 - FF 00

D161 (Not display) 00 - FF 00

D162 (Not display) 00 - FF 00

D163 (Not display) 00 - FF 00

D164 (Not display) 00 - FF 00

D165 (Not display) 00 - FF 00

D166 (Not display) 00 - FF 00

D167 (Not display) 00 - FF 00

D168 (Not display) 00 - FF 00

D169 (Not display) 00 - FF 00

D170 (Not display) 00 - FF 00

Item No. Item name Variable range Setting value

D171 (Not display) 00 - FF 00

D172 (Not display) 00 - FF 00

D173 (Not display) 00 - FF 00

D174 (Not display) 00 - FF 00

D175 (Not display) 00 - FF 00

D176 (Not display) 00 - FF 00

D177 (Not display) 00 - FF 00

D178 (Not display) 00 - FF 00

D179 (Not display) 00 - FF 00

D180 (Not display) 00 - FF 00

D181 (Not display) 00 - FF 00

D182 (Not display) 00 - FF 00

D183 (Not display) 00 - FF 00

D184 (Not display) 00 - FF 00

D185 (Not display) 00 - FF 00

D186 (Not display) 00 - FF 00

D187 (Not display) 00 - FF 00

4.6.5 MAIN CPU SYSTEM SETTING (*Fixed values)

Item No. Item name Variable range Setting value

Z001 (Not display) 00 - FF 00

Z002 (Not display) 00 - FF 00

Z003 (Not display) 00 - FF 00

Z004 (Not display) 00 - FF 00

Z005 (Not display) 00 - FF 00

Z006 (Not display) 00 - FF 00

Z007 (Not display) 00 - FF 00

Z008 (Not display) 00 - FF 00

Z009 (Not display) 00 - FF 00

Z010 (Not display) 00 - FF 00

1-32 (No.YA100)

Page 33

4.7 ADJUSTMENT PROCEDURE

4.7.1 POWER CIRCUIT [DISPLAY UNIT: PD-42X795]

Item

Measuring

instrument

Test point Adjustment part Description

PDP POWER VOLTAGE

CN0C4

1 : Vs 2 : Vset 3 : Ve 4 : NC 5 : Va 6 : NC 7 : Vscan 8 : NC 9 : GND 10 : POWER 11 : PANEL POWER 12 : Vs_ON

PANEL POWER

MAIN POWER PWB

Signal generator

DC voltmeter

Resistor

(1kΩ)

Connector

CN0C4

Vs Vset Ve Va Vscan

Vs VR:170V ADJ (R9424 Vset VR:160V ADJ (R9640 Ve VR:155V ADJ (R9646) Va VR:70V ADJ (R9219 Vscan VR:-60V ADJ (R9628 [MAIN POWER PWB]

[MAIN DC power supply

POWER

PWB]

MAIN POWER PWB voltage adjustment point

R9640

R9424

R9628

Voltage adjustment VR

Vscan

R9646

Vset

R9628

Fig.4

CN0C4

Vset

Vscan

GND

POWER

Vs_ON

Va Ve

SW1

Vset

3.3V ~ 5.0V (DC power supply)

1k (Resistor)

Fig.5

Voltage label

NTSC

XX XX XX XX XX

NTSC/PAL

Ve VsetVsc Vs

Fig.6

)

CAUTION:

• During adjustment operation of PDP POWER VOLTAGE, don't touch the heat sink of the MAIN

)

POWER PWB. If you touch it, electric shock may be caused.

< When MAIN POWER PWB is not replaced >

(1) Connect the DC voltmeter, load resistor (1kΩ),

DC power supply and switch SW1 to the CN0C4 connector and turn on the main power and switch SW1. (See Fig.2.)

(2) Adjust Vs (170V ADJ) VR, Vset (160V ADJ) VR,

Ve (155V ADJ) VR, Va (70V ADJ) VR and Vscan (-60V ADJ) VR so that the Vs, Vset, Ve, Va and Vscan voltage coincides with the values in the voltage label.

(3) Input a NTSC all-black signal and check that it

coincides with the values in the voltage label.

(4) Readjust if the adjusted value is different from

those in the voltage label.

NOTE:

• Designed value for the panel is printed on a label on the upper-right at the back of the PDP. (See Fig.3.)

< When MAIN POWER PWB is replaced >

CAUTION:

• Before making adjustments, be sure not to turn on the power when the CN8002

, CN8003, CN8005,

CN8006 and CN8008 connectors are connected,

as this may cause the PDP to break down.

(1) Disconnect the CN8002

, CN8003, CN8005,

CN8006 and CN8008 connectors on the MAIN

POWER PWB.

(2) Connect the DC voltmeter, load resistor (1kΩ),

DC power supply and switch SW1 to the CN0C4 connector and turn on the main power and switch SW1. (See Fig.2.)

(3) Adjust Vs (170V ADJ) VR, Vset (160V ADJ) VR,

Ve (155V ADJ) VR, Va (70V ADJ) VR and Vscan (-60V ADJ) VR so that the Vs, Vset, Ve, Va and Vscan voltage coincides with the values in the voltage label.

(4) Turn off the main power and switch SW1, and

connect the CN8002

CN8006

and CN8008 connectors and turn on

, CN8003, CN8005,

the power again.

(5) Input a NTSC all-black signal and check that it

coincides with the values in the voltage label.

(6) If the adjusted value is different from those in

the voltage label, fine-tune without unplugging the connectors.

CAUTION:

• Designated power supply voltage of the panel (Vs, Vset, Ve, Va, Vscan) varies according to the PDP unit.

• Pay careful attention during adjustment, as any error in procedure may cause the PDP to break down.

(No.YA100)1-33

Page 34

4.7.2 POWER CIRCUIT [DISPLAY UNIT: PD-50X795]

Item

Measuring

instrument

Test point Adjustment part Description

PDP POWER VOLTAGE

Voltage label

MODEL:PDP50x2xxxx ALL Voltage:DC5V Va:xxV Vs:xxxV Max Watt:xxxW

Signal generator

DC voltmeter

Connector

CN806

Vs Va

Vs VR:190V ADJ (R551 Va VR:60V ADJ (R351 [MAIN POWER UNIT]

[MAIN POWER UNIT]

MAIN POWER UNIT voltage adjustment point

CN806

1. Vs

2. Vs

3. Vs

4. NC

5. GND

6. GND

7. GND

8. GND

9. Va

10. Va

R551

R531

Voltage adjustment VR

Fig.1

CN806

GND

Fig.2

MAIN POWER UNIT

)

CAUTION:

• During adjustment operation of PDP POWER VOLTAGE, don't touch the heat sink of the MAIN POWER UNIT. If you touch it, electric shock may be caused.

< When MAIN POWER UNIT is not replaced >

(1) Connect the DC voltmeter to the CN806

connector and turn on the power. (See Fig.2)

(2) Adjust Vs (190V ADJ) VR and Va (60V ADJ) VR

so that the Vs and Va voltage coincides with the values in the voltage label.

(3) Input a NTSC all-black signal and check that it

coincides with the values in the voltage label.

(4) Readjust if the adjusted value is different from

those in the voltage label.

NOTE:

• Designed value for the panel is printed on a label on the upper-left at the back of the PDP. (See Fig.3)

< When MAIN POWER UNIT is replaced >

CAUTION:

• Before making adjustments, be sure not to turn

on the power when the CN805

and CN806 connectors are connected, as this may cause the PDP to break down.

(1) Disconnect the CN805

and CN806 connectors

on the MAIN POWER UNIT.

(2) Connect DC voltmeter to the CN806 connector

and turn on the power. (See Fig.2)

(3) Adjust Vs (190V ADJ) VR and Va (70V ADJ) VR

so that the Vs and Va voltage coincides with the values in the voltage label.

(4) Turn off the power, and connect the CN805

and

CN806 connectors and turn on the power again.

(5) Input a NTSC all-black signal and check that it

coincides with the values in the voltage label.

(6) If the adjusted value is different from those in

the voltage label, fine-tune without unplugging the connectors.

CAUTION:

• Designated power supply voltage of the panel (Vs, Va) varies according to the PDP unit.

• Pay careful attention during adjustment, as any error in procedure may cause the PDP to break down.

1-34 (No.YA100)

Fig.3

Page 35

4.7.3 VIDEO CIRCUIT [RECEIVER UNIT]

Item

525i A-D OFFSET

Measuring

instrument

Remote control unit

Test point Adjustment part Description

Signal generator

Disappears the color at both ends.

1125i BRIGHTNESS

Remote control unit

Signal generator

Set the 0% black part to be brightest.

1125i A-D OFFSET

Remote control unit

Signal generator

Minimize the red and blue noises in the upper half of the screen.

[1.ADJUST] S001: PREPARE (Adjustment setting mode change)

S008: 5i CB OF(525i cb offset) S009: 5i CR OF(525i cr offset)

S030: R DRIVE(Red drive) S031: G DRIVE(Green drive) S032: B DRIVE(Blue drive)

[1.ADJUST] S001: PREPARE (Adjustment setting mode change)

S012: HD BL(1125i brightness)

S030: R DRIVE(Red drive) S031: G DRIVE(Green drive) S032: B DRIVE(Blue drive)

[1.ADJUST] S001: PREPARE (Adjustment setting mode change)

S013: HD CB OF(1125i cb offset) S014: HD CR OF(1125i cr offset)

S030: R DRIVE(Red drive) S031: G DRIVE(Green drive) S032: B DRIVE(Blue drive)

(1) Receive a 525i component ramp pattern signal. (2) Set "VIDEO STATUS" to STANDARD. (3) Set "ASPECT" to FULL. (4) Set "COLOR TEMPERATURE" to LOW. (5) Select "1.ADJUST" from the SERVICE MODE. (6) Set < S030 > (R DRIVE), < S031> (G DRIVE)

and < S032 > (B DRIVE) to "133".

(7) Set < S001 >(adjustment setting mode change)

to set "008" and it change to the 525i A-D offset adjustment setting mode.

(8) Adjust < S008 > (525i Cb offset) and < S009 >

(525i Cr offset) to lose the gap (red line, green line and blue line) which appears at both ends of a white part at the center of the screen.

(9) Set < S001 > to set "000" and it change to the

normal mode.

(10) Press the [MUTING] key to memoirze the set

value.

(1) Receive a 1125i gray scale pattern signal . (2) Set "VIDEO STATUS" to STANDARD. (3) Set "ASPECT" to FULL. (4) Set "COLOR TEMPERATURE" to LOW. (5) Select "1.ADJUST" from the SERVICE MODE. (6) Set < S030 > (R DRIVE), < S031> (G DRIVE)

and < S032 > (B DRIVE) to "133".

(7) Set < S001 > (adjustment setting mode change)

to set the values "012" and it change to the 1125i brightness adjustment setting mode.

(8) Adjust < S012 > (1125i brightness) to set the

0% black part in the upper half of the screen to be brightest.

(9) Set < S001 > to set "000" and it change to the

normal mode.

(10) Press the [MUTING] key to memoirze the set

value.

(1) Receive a 1125i 30% all white pattern signal. (2) Set "VIDEO STATUS" to STANDARD. (3) Set "ASPECT" to FULL. (4) Set "COLOR TEMPERATURE" to LOW. (5) Select "1.ADJUST" from the SERVICE MODE. (6) Set < S030 > (R DRIVE), < S031> (G DRIVE)

and < S032 > (B DRIVE) to "133".

(7) Set < S001 > (adjustment setting mode change)

to set "013" and it change to the 1125i A-D offset adjustment setting mode.

(8) Set < S013 > (1125i Cb offset) to minimize the

blue noise in the upper half of the screen.

(9) Set < S014 > (1125i Cr offset) to minimize the

red noise in the upper half of the screen.

(10) Set < S001 > to set "000" and it change to the

normal mode.

(11) Press the [MUTING] key to memoirze the set

value.

(No.YA100)1-35

Page 36

Item

SUB SCREEN A-D OFFSET

Set the 0% block part to be brightest.

VIDEO-1

WHITE BALANCE (HIGHLIGHT)

Measuring

instrument

Remote control unit

Signal generator

<30% all white>

Remote control unit

Signal generator

Test point Adjustment part Description

[1.ADJUST] S001: PREPARE (Adjustment setting mode change)

(1) Set "VIDEO STATUS" to STANDARD. (2) Set "ASPECT" to FULL. (3) Set "COLOR TEMPERATURE" to LOW.

(4) Set "MULTI SCREEN" to TWIN. S016: RT CB OF (Sub screen cb offset) S017: RT CR OF (Sub screen cr offset)

(5) Receive a NTSC 30% all white pattern signal on

the Right screen. At the same time, set the Left

screen in VIDEO-1 mode (No signal). (6) Select "1.ADJUST" from the SERVICE MODE. (7) Set < S030 > (R DRIVE), < S031> (G DRIVE)

S030: R DRIVE(Red drive) S031: G DRIVE(Green drive) S032: B DRIVE(Blue drive)

and < S032 > (B DRIVE) to "133". (8) Set < S001 > (adjustment setting mode change)

to set "017" and it change to the sub screen A-

D offset adjustment setting mode. (9) Adjust < S016 > (Sub screen cb offset) to

minimize the blue noise in the upper half of the

screen.

If you select an adjustment item < S016 >,

TV(RF)

then the screen automatically turn to twin

pictures mode.

(10) Adjust < S017 > (Sub screen cr offset) to

minimize the red noise in the upper half of the

screen.

(11) Readjust < S016 > and < S017 > to set the

upper half of the screen to be the blackest. (See

Fig.9)

(12) Set < S001 > to set "000" and it change to the

normal mode.

(13) Press the [MUTING] key to memoirze the set

value.

[1.ADJUST] S030: R DRIVE (Red drive) S031: G DRIVE (Green drive) S032: B DRIVE (Blue drive)

(1) Receive a NTSC 75% all white signal. (2) Set "VIDEO STATUS" to STANDARD. (3) Set "ASPECT" to FULL. (4) Set "COLOR TEMPERATURE" to LOW. (5) Select "1.ADJUST" from the SERVICE MODE. (6) Adjust to keep one of < S030 > (Red drive),

< S031 > (Green drive) or < S032 > (Blue

drive) unchanged, then lower the other two

so that the all-white screen is equally white

throughout.

NOTE:

Set one or more of < S030 >, < S031 >, and

< S032 > to "133". (7) Check that white balance is properly tracked

from low light to high light. If the white balance

tracking is deviated, adjust to correct it. (8) Press the [MUTING] key to memoirze the set

value.

1-36 (No.YA100)

Page 37

4.7.4 MTS CIRCUIT [RECEIVER UNIT]

Item

MTS INPUT LEVEL

Measuring

instrument

Remote control unit

Test point Adjustment part Description

Signal generator

MTS SEPARATION

TV audio multiplex

L OUT

R OUT signal generator

Oscilloscope

Remote control unit

L-Channel signal waveform

1 cycle

[1.ADJUST] T001: IN LEVEL

[1.ADJUST] T002: LOW SEP T003: HI SEP

R-Channel crosstalk portion

Minimum

(1) Receive the any broadcast. (2) Select "1.ADJUST" from the SERVICE MODE. (3) Verify that the < T001 > (IN LEVEL) is set at its

initial setting value.

(4) Press the [MUTING] key to memorize the set

value.

(1) Input the stereo L signal (300Hz) from the TV

audio multiplex signal generator to the antenna terminal.

(2) Connect an oscilloscope to L OUT pin of the

AUDIO OUT, and display one cycle portion of the 300Hz signal.

(3) Change the connection of the oscilloscope to R

OUT pin of the AUDIO OUT, and enlarge the

voltage axis. (4) Select "1.ADJUST" from the SERVICE MODE. (5) Set the initial setting value of the < T002 > (LOW

SEP). (6) Adjust the < T002 > so that the stroke element

of the 300Hz signal will become minimum. (7) Change the signal to 3kHz, and similarly adjust

the < T003> (HI SEP). (8) Press the [MUTING] key to memorize the set

value.

(No.YA100)1-37

Page 38

SECTION 5

SERVICE MENU

1.ADJUST

2.SELF_CHK

3.I2C STOP

LOB OK FAN OK SYNC M:OK S:OK HD:NG TIM OK MSM OK DIG OK MEM OK AVSW OK YC OK AIO OK TUN OK GCR NG 1 IP OK RGB OK 8 DVI OK HDMI OK

FAN OK ALM OK TMP OK ATP OK ASH OK

PNL OK MEM OK TMP OK AIO OK

TROUBLESHOOTING

5.1 SELF CHECK FEATURE

5.1.1 OUTLINE

This unit comes with the "Self check" feature, which checks the operational state of the circuit and displays/saves it during failure.Diagnosis is performed when power is turned on, and information input to the main microcomputer is monitored at all time.Diagnosis is displayed in 2 ways via screen display and LED flashes. Failure detection is based on input state of I

C bus and

the various control lines connected to the main microcomputer.

5.1.2 HOW TO ENTER THE SELF CHECK MODE

Before entering the Self check Display mode, confirm that the setting of TV / CATV SW of the REMOTE CONTROL UNIT is at the "TV" side and the setting of VCR / DVD SW is at the "VCR" side. If the switches have not been properly set, you cannot enter the Self check Display mode.

(1) Set to 0 minutes using the [SLEEP TIMER] key. (2) Press the [VIDEO STATUS] key and [DISPLAY] key

simultaneously, then enter the service mode.

(3) Press the [2] key (SELF_CHK) before the service mode

screen disappears.

(4) Press the [SLEEP TIMER] key to enter Page 2 of the SELF

CHECK MODE.

• When the [RETURN +] key pressed, the first page change screen.

NOTE:

When a number key other than the [1] to [3] key is pressed in the SERVICE MODE screen, the other relevant screen may be displayed. This is not used in the adjustment procedure. Press the [MENU] key to return to the SERVICE MENU.

5.1.3 HOW TO EXIT THE SELF CHECK MODE To Save Failure History:

Turn off the power by unplugging the AC power cord plug when in the Self check display mode.

To Clear (Reset) Failure History:

Turn off the power by pressing the [POWER] key on the remote control unit when in the Self check display mode.

5.1.4 FAILURE HISTORY

Failure history can be counted up to 9 times for each item. When the number exceeds 9, display will remain as 9. Failure history will be stored in the memory unless it has been deleted.

NOTE:

Only SYNC (with/without sync signals) will be neither counted nor stored.

5.1.5 POINTS TO NOTE WHEN USING THE SELF CHECK FEATURE

In addition to circuit failures (abnormal operation), the following cases may also be iagnosed as "Abnormal" and displayed and counted as "NG".

(1) Temporary defective transmissions across circuits due to

pulse interruptions

(2) Misalignment in the on/off timing of power for I

C bus

(VCC) when turning on/off the main power. Diagnosis may be impeded if a large number of items are displayed as "NG". As such, start Self check check only after 3 seconds in the case of receivers and 5 seconds in the case of panels upon turning on the power. If recurrences are expected, ensure to clear (reset) the failure history and record the new diagnosis reults.

MAIN MENU SCREEN

SERVICE MENU

1.ADJUST

2.SELF_CHK

3.I2C STOP

SELF CHECK MODE SCREEN (Page 1)

LOB OK FAN OK SYNC M:OK S:OK HD:NG TIM OK MSM OK DIG OK MEM OK AVSW OK YC OK AIO OK TUN OK GCR NG 1 IP OK RGB OK 8 DVI OK HDMI OK

Item

CHECK Normality=OK Abnormality=NG

SELF CHECK MODE SCREEN (Page 2)

FAN OK ALM OK TMP OK ATP OK ASH OK

PNL OK MEM OK TMP OK AIO OK

1-38 (No.YA100)

Item

* As "SYNC" is not counted, the number of failures not displayed.

CHECK Normality=OK Abnormality=NG

Fig.1

Page 39

5.1.6 DETAILS

Self check is performed for the following items:

< Page 1 of screen (RECEIVER UNIT) >

Detection item Display Detection content

Low bias line short protection

LOB Confirm the operation of the low bais

(2.5V / 3.3V / 5V / 9V) protection circuit.

Q9822 [REGULATOR PWB]

Fan lock FAN Confirm the operation of the cooling fan.

IC711 [ANALOG SIGNAL PWB]

Presence of sync signal

SYNC Confirmation of presence of video

sync signal. M : Main sync signal S : Sub sync signal HD : Component sync signal

IC201 [ANALOG SIGNAL PWB]

AC power input TIM Not used.

Main CPU communication

MSM Confirmation of ACK (response)

signal which uses sync communications with Chassis CPU.

IC7601 [DIGITAL SIGNAL PWB]

Digital tuner DIG Not used.

Main memory MEM Same as above

IC7602 [DIGITAL SIGNAL PWB]

AV select switch AVSW Same as above.

IC301, IC501 [ANALOG SIGNAL PWB]

3 dimensions YC separator

YC Same as above.

IC1001 [DIGITAL SIGNAL PWB]

Multi sound process AIO Same as above.

IC3101 [RECEIVER PWB]

RF tuner TUN Same as above.

TU3001 [RECEIVER PWB]

Ghost reduction GCR Not used.

DIST process IP Confirmation of reply of ACK signal

which uses I

C communication.

IC3001 [DIGITAL SIGNAL PWB]

RGB process RGB Same as above.

IC4001 [DIGITAL SIGNAL PWB]

DVI (Digital communication)

DVI Same as above.

IC6101 [DIGITAL SIGNAL PWB]

Digital input HDMI Same as above.

IC8001 [DIGITAL SIGNAL PWB]

Diagnosis

signal

(line)

LB_PRO

FAN_LOCK

SDA

---

WAKE

---

SDA

---

SDA

Detection timing

Detection starts 3 seconds after the power is turned on. If error continues between 400ms the power is turned off.

Detection starts 3 seconds after the power is turned on. If error continues between 250ms the power is turned off.

Confirmation of presence of sync signal in video signal.

---

If it checks whenever sync communication with sub (chassis) CPU performed and no reply of ACK signal an error will be counted.

---

If it checks whenever I2C communication is performed and no reply of ACK signal an error will be counted.

Same as above.

---

If it checks whenever I2C communication is performed and no reply of ACK signal an error will be counted.

Same as above.

(No.YA100)1-39

Page 40

< Page 2 of screen (DISPLAY UNIT) >

Detection item Display Detection content

Fan lock

[PD-50X795]

FAN Confirm the operation of the cooling

fan.

IC807 [DISPLAY INTERFACE PWB]

Abnormal of operation of PDP (PANEL)

ALM Confirm the operation of the panel

protection.

[PDP UNIT]

Abnormal rise of temperature in PDP (PANEL)

Abnormal rise of

TMP It detects whether the temperature in a

display unit is normal.

IC8101 [TEMP. SENSOR PWB]

ATP Not used. --- Not used. temperature in AUDIO PWB

Short circuit detection

ASH Not used. --- Not used.

of AUDIO PWB

Panel communication PNL It confirm whether panel

communication is normal.

[PDP UNIT]

Panel memory MEM Confirmation of reply of ACK signal

which uses I

C communication.

IC805 [DISPLAY INTERFACE PWB]

Temp. sensor operation

TMP Same as above.

IC8101 [TEMP. SENSOR PWB]

Audio control AIO Same as above.

IC6521 [AUDIO PWB]

Diagnosis

signal

Detection timing

(line)

FAN_LOCK

Detection starts 8 seconds after the power is turned on. Detection is performed every 16ms. If errors continues between 300ms the power is turned off.

SDA Detection starts 8 seconds after the power is

turned on. Detection is performed every 16ms. If errors continues between 300ms the power is turned off.

SDA Detection starts 8 seconds after the power is

turned on. Detection is performed every 0.5 seconds. If a temperature rises beyond the temperature of 71ºC for detection of error over the predetermined 120 times the power is turned off.

SDA If it checks whenever I

C communication is performed and no reply of ACK signal an error will be counted.

SDA Same as above.

5.1.7 METHOD OF DISPLAY WHEN A RASTER IS NOT OUTPUT

In the state where a raster is not output by breakdown of the set, an error is displayed by blink of the POWER LED.

Type of error Display POWER LED flash cycle Unit

Low bias line short protection LOB Low luminance blue Flash 1.0 second / Low luminance blue Out 1.0 seconds RECEIVER UNIT

Fan lock [Receiver unit] FAN Low luminance blue Flash 0.1 second / Low luminance blue Out 0.1 seconds RECEIVER UNIT

ATSC digital tuner error --- Low luminance blue Flash 2.0 second / Low luminance blue Out 2.0 seconds RECEIVER UNIT

Fan lock [Display unit] FAN High luminance blue Flash 0.1 second / High luminance blue Out 0.1 seconds DISPLAY UNIT

[PD-50X795]

Abnormal of operation of PDP (PANEL) ALM High luminance blue Flash 1.0 second / High luminance blue Out 1.0 seconds DISPLAY UNIT

Abnormal rise of temperature in PDP (PANEL) TMP High luminance blue Flash 2.0 second / High luminance blue Out 2.0 seconds DISPLAY UNIT

< Explanation of operation >

If error is detected, the power is turned off. Shortly after a power is turned off, POWER LED will be blinked. Power cannot be turned on until the power cord takes out and inserts, after a power is turned off.

1-40 (No.YA100)

Page 41

Victor Company of Japan, Limited AV & MULTIMEDIA COMPANY VIDEO DISPLAY CATEGORY 12, 3-chome, Moriya-cho, kanagawa-ku, Yokohama, kanagawa-prefecture, 221-8528, Japan

(No.YA100)

Printed in Japan

VPT

JVC PD-42X795/S, PD-50X795/Z Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

1.1 SAFETY PRECAUTIONS

1.2 INSTALLATION

1.3 PRECAUTIONS REGARDING PDP

2.1 FEATURES

2.2 SYSTEM SETTEING

2.3 TECHNICAL INFORMATION

3.1 DISASSEMBLY PROCEDURE [DISPLAY UNIT: PD-42X795]

3.2 DISASSEMBLY PROCEDURE [DISPLAY UNIT: PD-50X795]

3.3 DISASSEMBLY PROCEDURE [RECEIVER UNIT]

3.4 MEMORY IC REPLACEMENT

3.5 REPLACEMENT OF CHIP COMPONENT

4.1 ADJUSTMENT PREPARATION

4.2 PRESET SETTING BEFORE ADJUSTMENTS

4.3 MEASURING INSTRUMENT AND FIXTURES

4.4 ADJUSTMENT ITEMS

4.5 BASIC OPERATION OF SERVICE MODE

4.6 INITIAL SETTING VALUES IN THE SERVICE MODE

4.7 ADJUSTMENT PROCEDURE

5.1 SELF CHECK FEATURE