JVC PD-42V475/S, PD-42V485/S Service Manual

SERVICE MANUAL

PDP COLOR TELEVISION

PD-42V475

PD-42V485/S

BASIC C

POWER

CATVVCR

DVD

MULTI SCREEN

TWIN

INDEX

C.C.

SWAP

SELECT

INPUT

FREEZE

DISPLAY

SLEEP TIMER

SOUND

RETURN+

TUNE

VIDEO STATUS

THEATER PRO

LIGHT

ASPECT

MUTING

CH +

VOL

CH Ð

BACK

VCR/DVD

VCR CHANNEL

TV/VCR

POWER

PREV NEXT

PLAY FFREW

REC

STOP PAUSE

OPEN/CLOSE

STILL/PAUSE

RM-C1257G

HASSIS

FP2

1 PRECAUTION

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

2 SPECIFIC SERVICE INSTRUCTIONS 3 DISASSEMBLY 4 ADJUSTMENT 5 TROUBLESHOOTING

..................................................................................................................................................... 1-11

...................................................................................................................................................... 1-22

........................................................................................................................................... 1-31

...................................................................................................................... 1-6

No.YA099

2004/7

SPECIFICATION

Items

Dimensions (W x H x D)

Mass 48.3kg (106.3

TV RF System CCIR (M) Color System NTSC Sound System BTSC (Multi channel sound) TV Receiving Channels VHF Low 02ch to 06ch : 54MHz to 88MHz and Frequency VHF High 07ch to 13ch : 174MHz to 216MHz

TV/CATV Total Channel 180 channel Intermediate Frequency VIF 45.75MHz

Color Sub Carrier Frequency Power Input AC120V, 60Hz Power Consumption Operate : 364W, Stand by: 0.94W Plasma Display Panel (PDP)  QLE0028-001

Screen Size Visible size : 107.5cm (Diagonel) / 93.3 cm x 53.3 cm (H x V) Display Pixels Speaker 6.6cm round x4 (Oblique cone) Audio Power Output 10W + 10W Antenna terminal (VHF / UHF) F-type connector, 75Ω unbalanced, coaxial Video / Audio Iutput S-Video [1/3/4] Mini-DIN 4 pin connector x3 [1/2/3/4] Y: 1V(p-p), 75Ω, positive (negative sync)

Component video [1/2] RCA pin jack x 3

1125i / 750p Y : 1V(p-p), 75

525i / 525p Y : 1V(p-p), 75Ω, positive (negative sync)

Audio Output RCA pin jack x2

Center Channel Input 500mV (rms), low impedance, RCA pin jack x 1 PC (RGB) Input D-sub 15pin x 1

AV COMPULINK ΙΙΙ 3.5mm mini jack x1 Digital-in HDMI connector x 1

Remote Control Unit RM-C1257G (AA/R6 TYPE battery x 2)

104.5cm x 79.1cm x 30.8cm (41-1/4” x 31-1/4” x 12-1/4”) [Included stand]

104.5cm x 72.9cm x 11.0cm (41-1/4” x 28-3/4” x 4-3/8”) [TV only] l

bs) [Included stand]

38.3kg (84.33lbs) [TV only]

UHF 14ch to 69ch : 470MHz to 806MHz

CATV 54MHz to 804MHz

Low Band : 02 to 06, A-8 by 02 to 06&01 High Band : 07 to 13 by 07 to 13 Mid Band : A to I by 14 to 22 Super Band : J to W by 23 to 36 Hyper Band : W+1 to W+28 by 37 to 64 Ultra Band : W+29 to W+84 by 65 to 94, 100 to 125 Sub Mid Band : A4 to A1 by 96 to 99

SIF

41.25MHz (4.5MHz)

3.58MHz

42V wide aspect (16:9)

H: 852 pixels / V: 480 pixels

C: 0.286V(p-p), (Burst signal), 75 Video 1V(p-p), 75Ω, negative sync, RCA pin jack x4 Audio 500mV(rms) (-4dBs), high impedance, RCA pin jack x8

Ω

, 3-value sync : ±0.35V(p-p)

Pb/Pr : ±0.35V(p-p), 75

Pb / Pr : 0.7V(p-p), 75

VARI More than 0 - 1000mV(rms) (+2.2dBs)

FIX 500mV (rms) (-4dBs), low impedance (400Hz when modulated 100%)

R/G/B : 0.7V (p-p), 75

HD / VD : 1V (p-p) to 5V (p-p), high impedance

VGA : 640 pixels x 480 pixels (Horizontal : 31.5kHz / Vertical : 60Hz)

(Digital-in terminal is not compatible with picture signals of personal computer.) Video Digital : HDMI connector Audio Digital : HDMI connector

Analog : 500mV(rms) (-4dBs), high impedance, RCA pin jack x 2

[W-VGA]

Ω

Contents

Ω

Design & specifications are subject to change without notice.

1-2 (No.YA099)

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 : ( GND, the ISOLATED (NEUTRAL) : ( EARTH : (

) side GND. Don't short between the LIVE

) side GND and

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.

) side

(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.).

Alternative 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 1000 ohms 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 1000Ω/V, OR MORE SENSITIVITY)

0.15µF AC-TYPE

PLACE THIS PROBE

1500Ω 10W

GOOD EARTH GROUND

ON EACH EXPOSE ME TA L PA RT

(No.YA099) 1-3

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 predetermined 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.

SPACE REQUIRED FOR INSTALLATION

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.

150 mm or

150 mm

200 mm or 200 mm

50 mm

50 mm or more

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.

150 mm or more

150 mm

200 mm 200 mm

or more

50 mm

50 mm or more

1-4 (No.YA099)

The supplied hook for tipfall prevention

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 FILER (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 REPLACEMENT 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.YA099) 1-5

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

2.1 FEATURES

2.1.1 HIGH-DEFINITION IMAGE TECHNOLOGY (DIST)

• DIST (Digital Image Scaling Technology)

Employs an interpolation method that doubles the scanning lines to realize 480-line flickerfree picture making it especially suitable for reproducing high-resolution pictures even on largescreen displays.

2.1.2 MAIN FUNCTION

•

DIGITAL NOISE CLEAR

With digital noise clear, this helps take our static or noise from a channel that may not be coming in clearly.

• NATURAL CINEMA

Natural cinema corrects the problem of blurred edges which may occur when viewing a program originally shot on film (such as motion pictures) or animation. If you notice blurring at the edges of these programs, choose NATURAL CINEMA and set it to AUTO.

•

COLOR MANAGEMENT

This TV supports the COLOR MANAGEMENT function to ensure dull colors are compensated to produce natural hues.

•

DYNAMIC GAMMA

JVC's Dynamic Gamma Circuitry (DGC) makes it easier to see dark areas when a picture has many dark areas, and makes it easier to see the bright areas when a picture has many bright areas. DGC is turned on, DGC analyzes and adjusts the total level of picture brightness balance, especially in dark areas where the level of greyscale is often lost, turning completely to black.

• MTS (Multi-Channel Television Sound)

MTS technology allows several audio signals to be broadcast at once, giving you a choice in what you wish to hear with a TV program. In addition to mono or stereo sound, an MTS broadcast may also include a second audio program (SAP).

• THEATER PRO D6500K

The TheaterPro D6500K color temperature technology function makes sure that the video you watch is set to the standard color temperature, so that what you see is as true to what the film to video editors intended it to be.

• V-CHIP

Your TV is equipped with V-Chip technology which enables you to block channels or content that you feel to be inappropriate for children, based on US and Canada rating guidelines. V-Chip has no effect on video signals from a DVD discs, VCR tapes or Camcorder connection.

• AUTO SHUT OFF

This function automatically shuts off your TV when there is no signal from the channel the TV is on.

2.1.3 ASPECT CONTROL

The screen size can be changed according to the picture aspect ratio.

• ASPECT function

Desired screen size (PANORAMA / CINEMA / FULL / HD PANORAMA / REGULAR / CINEMA ZOOM) can be selected.

2.1.4 MULTI-SCREEN FUNCTION

• Twin-pictures function

With the function, two pictures can be displayed at the Twin pictures mode.

• Index-picture function

With this function, one of index-picture (12 pictures) can be displayed at the same time.

• Freeze function

The images that are currently seen can be viewed on the memo screen (still picture). It is convenient for taking down notes like application address and recipe of cooking program etc, while enjoying the current program.

2. 2 MAIN DIFFERENCE LIST

Item PD-42V475/S PD-42V485/S

FRONT PANEL COLOR SILVER BLACK SMART SOUND NO YES SMART CAPTION NO YES

1-6 (No.YA099)

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 0.365mm (1 pixel 1.095mm) horizontally and 1.110mm 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 0.365mm horizontally and 1.110mm vertically.

Direction

Vertically

No.1

Pixel line

No.2

Pixel line

No.479

Pixel line

No.480

Pixel line

Horizontally

No.1 Pixel

sequence

B G R B G R

(Horizontally) Pixel pitch

RBGR

G RBG R

GRBGR

1.095mm

No.2 Pixel

sequence

1 pixel (1 dot)

B Cell

Cell

R Cell

No.851 No.852

Pixel

sequence

Pixel

sequence

B GRBG R

BGRBGR

G RBG R

GRBGR

0.365mm

(Horizontally) Cell pitch

1.110 mm (Vertically)

Pixel pitch

(Cell pitch)

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 Dot Defects

Bright dot defect is a pixel cell that lights though it should not light. The presence of bright dot defects can be confirmed by inputting a full black signal (pattern).

(2) Dark Dot Defects

Dark dot defect is a pixel cell that does not light, though it should light. The presence of dark dot defects can be confirmed by inputting a 100% full white signal (pattern).

(3) Flicker Dot Defects

Flicker dot defect is a pixel cell that blinks though it should light or not light. The presence of flicher dot defects can be confirmed by inputting a full black signal (pattern).

(No.YA099) 1-7

2.3.2 CHASSIS CPU [DIGITAL SIGNAL PWB : IC7001] PIN FUNCTION

Pin No.

Pin name I/O Function

1 NC O Not used 2 P_MU O Video muting [Muting : H] 3 FUNC_LED O Not used 4 A_MU O Audio muting [Muting : H] 5 M_MU O Not used 6 PC_SW O PC input select [ON : H] 7 DIMMER_LED O Power LED dimmer control

Pin No.

61 GND - GND 62 DIN_PH I Optical DET. out 63 ATSC_REC I Not used 64 YS1 I Not used 65 YS2 I Not used 66 3.3V I 3.3V 67 DIN_PRO O Digital-in voltage detection

[Low dimmer : L] 8 NC O Not used 9 NC O Not used 10 NC O Not used 11 POW_LED O Power LED control [ON : H] 12 WORD O Programming control 13 SBT2 I Clock for main CPU communication 14 SBI2 I Data receive for main CPU

communication 15 SBO2 O Data transmission for main CPU

communication 16 REQ O Request for main CPU

communication

68 NC O Not used 69 NC O Not used 70 NC O Not used 71 NC O Not used 72 NC O Not used 73 SBD5 I/O Flash writing for chassis CPU 74 SBT5 I Flash writing for chassis CPU 75 3.3V I 3.3V 76 NC I Not used 77 REMOCON I Remote control 78 V_SYNC I Vertical sync

79 WAKEUP_SHM I Sleep state release for chassis 17 3.3V I 3.3V 18 NC O Not used 19 GND - GND

80 POWERGOOD I Power error detection [Detection : H]

81 REC_LED O Stand-by power LED control 20 3.3V I 3.3V 21 NC O Not used 22 3.3V I 3.3V 23 OSCI I 16MHz for system clock

82 RST I Chassis CPU reset [Reset : L]

83 3.3V I 3.3V

84 SCL3A O I 24 OSCO O 16MHz for system clock 25 3.3V I 3.3v 26 NC O Not used 27 A92_RST O 3D YC separation reset [Reset : L] 28 NC O Not used

85 SDA3A I/O I 29 LIP_RST O Not used 30 NC O Not used 31 NC I Not used 32 NC O Not used 33 MDR_CON I Not used

86 SCL3B O I 34 3.3V I 3.3V 35 NC O Not used 36 DsyncSW2 O Digital sync signal select

[Digital sync : L] 37 NC O Not used 38 NC O Not used

87 SDA3B I/O I 39 HOTPLUG I Not used 40 MECA_SW I Power switch monitor [ON : L] 41 MAIN_POW O Main power control [ON : L] 42 VARI / FIX O Audio out select [VARI : L / FIX : H] 43 0V - GND 44 NC I Not used 45 AFT1 I AFT detection [Detection : H] 46 NC I Not used 47 NC I Not used 48 NC O Not used 49 NC O Not used 50 NC I Not used 51 NC O Not used 52 NC I Not used 53 NC O Not used 54 3.3V I 3.3V 55 PDP_TX O 56 PDP_RX I

PDP communication for panel CPU PDP communication for panel CPU

57 SDA0 I/O I2C bus data (for chassis memory)

88 DIN_sel O Not used

89 LR_SW O Digital-in control

90 DIN_INT O Digital-in reset [Reset : H]

91 DVI_RST O Not used

92 GND - GND

93 SCL5055 O I2C bus clock (for DIST)

94 NC O Not used

95 SDA5055 I/O I2C bus data (for DIST)

96 NC O Not used

97 NC O Not used

98 15K/OTH O Y signal select for 3D YC separation

99 DsyncSW1 O Not used

100 JCC5057_BUSY I Busy for gamma correction / color 58 SCL0 O I2C bus clock (for chassis memory) 59 SDA_DVI I/O Not used 60 SCL_DVI I/O Not used

Pin name I/O Function

[Detection : H]

CPU [Relese : L]

[Stand-by :H]

C bus clock (for 3D YC separation, gamma correction / color management / RGB process / OSD composition, U / V frontend, HDMI driver)

C bus data (for 3D YC separation, gamma correction / color management / RGB process / OSD composition, U / V frontend, HDMI driver)

C bus clock (for video / audio select, color demod. / sync sep., 3 line comb filter, component video / audio select, sync sep. / SW / detect, MTS demod. / surround / audio control)

C bus data (for video / audio select, color demod. / sync sep., 3 line comb filter, component video / audio select, sync sep. / SW / detect, MTS demod. / surround / audio control)

[525i : H / other : L]

management / RGB process / OSD composition [Busy : H]

1-8 (No.YA099)

2.3.3 MAIN CPU [DIGITAL SIGNAL PWB : IC7601] PIN FUNCTION

Pin No.

Pin name I/O Function

1 VHOLD1 I Data slicer (closed caption) for main 2 HFLT1 I/O

LPF of video signal (closed caption) 3 NC I/O Not used 4 NC I/O Not used 5 DIGR0 O Red for OSD 6 TB1in I Clock information 7 REMO I Remote control 8BYTE -GND 9 CNVss I

CPU mode select [CPU : L / Writing : H] 10 DIGG0 O Green for OSD 11 DIGB0 O Blue for OSD 12 RESET I Main CPU reset [Reset : L] 13 Xout O 16MHz for system clock 14 Vss - GND 15 Xin I 16MHz for system clock 16 Vccl I 3.3V 17 OSC1 I Clock input for OSD 18 OSC2 O Not used 19 INT1 I AV COMPULINK

ΙΙΙ

20 INT0 I Request for chassis CPU

communication 21 OUT1 O YS for OSD 22 OUT2 O YM for OSD 23 NC I/O Not used 24 NC I/O Not used 25 NC I/O Not used 26 NC I/O Not used 27 CTA2/RTS2 I/O Not used 28 CLK2 I/O Not used 29 RxD2 I/O Not used 30 TxD2 I/O Not used 31 SDA2 I/O Not used 32 DIGR1 O Red for OSD 33 DIGG1 O Green for OSD 34 DIGB1 O Blue for OSD 35 TxD0 I Programming control 36 RxD0 O Flash writing for main CPU 37 CLK0 I Programming clock 38 RTS0 I/O Busy for flash writing composition

[Busy : H] 39 P5.7 I Not used 40 P5.6 O Not used 41 HOLD I Main CPU hold for flash writing

[Hold : L] 42 P5.4 O Not used 43 P5.3 O Not used 44 P5.2 O Not used 45 P5.1 O Not used 46 WR O

CPU mode select [CPU : L / Writing : H] 47 P4.7 O Data transmission for chassis CPU

communication 48 P4.6 I Data receive for chassis CPU

communication 49 P4.5 O Clock for chassis CPU

communication 50 P4.4 I/O Not used 51 NC I/O Not used 52 NC I/O Not used 53 NC I/O Not used 54 NC I/O Not used 55 NC I/O Not used 56 NC I/O Not used 57 NC I/O Not used 58 NC I/O Not used 59 NC I/O Not used

Pin No.

Pin name I/O Function

60 NC I/O Not used 61 NC I/O Not used 62 HSYNC I Horizontal sync for OSD 63 NC I/O Not used 64 VSYNC I Vertical sync for OSD 65 NC I/O Not used 66 NC I/O Not used 67 NC I/O Not used 68 NC I/O Not used 69 NC I/O Not used 70 NC I/O Not used 71 NC I/O Not used 72 NC I/O Not used 73 NC I/O Not used 74 NC I/O Not used 75 NC I/O Not used 76 NC I/O Not used 77 NC I/O Not used 78 NC I/O Not used 79 NC I/O Not used 80 NC I/O Not used 81 NC I/O Not used 82 NC I/O Not used 83 NC I/O Not used 84 WAKE O Sleep state release for chassis

CPU [Relese : L] 85 CARD_DET I/O Not used 86 POWER_SW I Main power switch [ON : L] 87 SDAM O I2C bus clock (for main memory) 88 SCLM I/O I2C bus Data (for main memory) 89 DIGR2 O Red for OSD 90 DIGG2 O Green for OSD 91 DIGB2 O Blue for OSD 92 NC I/O Not used 93 KEY2 I Key scan data 1 [ON :H] 94 KEY1 I Key scan data 2 [ON :H] 95 VHOLD2 I Data slicer (closed caption) for sub 96 HLF2 I/O LPF of video signal (closed caption) 97 CVIN2 I Composite video input for closed

caption (SUB-CCD) 98 TVSETB - GND 99 VCCE - 5V 100 CVIN1 I Composite video input for closed

caption (MAIN-CCD)

(No.YA099) 1-9

2.3.4 PANEL CPU [INTERFACE PWB : IC807] PIN FUNCTION

Pin No.

Pin name I/O Function

1 SYSTEM0 I PDP size select

[1.75V : 42V VGA 3.25V : 35V VGA]

2 SYSTEM3 I PDP maker select

[0V : SAMSUNG 3.25V : NEC] 3 AVCC I 5.0V 4 X2 - Not used 5X1 -GND 6 VCL - GND 7 RES I Reset [Reset : L] 8 TEST I GND 9 VSS - GND 10 OSC2 O 16MHz for system clock 11 OSC1 I 16MHz for system clock 12 VCC I 5.0V 13 PW_LOB O Power control [ON : L] 14 PANEL_PW_ON O Panel power control [ON : L] 15 TALK_RST O Not used 16 CODEC_RST O Not used 17 I2C_STOP O I2C bus stop control [Stop : L] 18 NC O Not used 19 NC O Not used 20 NC O Not used 21 NC O Not used 22 NC O Not used 23 SDA1 I/O I2C bus data (for panel memory) 24 FAN O Not used 25 SCL1 O I2C bus clock (for panel memory) 26 SDA0 I/O I

27 SCL0 O I

C bus data (for BBE / surround /

audio control, temp. sensor)

C bus clock (for BBE / surround /

audio control, temp. sensor) 28 SDA2 I/O 29 SCL2 O

I2C bus data (for PDP communication)

I2C bus clock (for PDP communication) 30 NC O Not used 31 SDA3 I/O Not used 32 SCL3 O Not used 33 NC O Not used 34 NC O Not used 35 NMI I Port for writing on board control

[Writing : L] 36 A_MU O Audio muting [Muting : H] 37 (HD) I Not used 38 ON_TIMMER O Not used 39 REMO I Not used 40 POWERLED O Not used 41 P85 I Emulator connection / Port for

writing on board [Writing : H] 42 P86 I Emulator connection 43 P87 I Emulator connection 44 SCK3 O Port for writing on board 45 RXD I Port for writing on board 46 TXD O Port for writing on board 47 AC_DET I AC power frequency detection

[Detection : H] 48 NC O Not used 49 RXD2 I Data receive for main CPU

communication 50 TXD2 O Data transmision for main CPU

communication 51 NC O Not used 52 MECA_SW I Not used 53 VD I Vertical sync 54 REC_DET I Not used

Pin No.

Pin name I/O Function

55 I2C_READY I PDP I2C communication select

[Prohibition : L Permission : H] 56 FAN_LOCK I Not used 57 SYSTEM2 I Not used 58 SYSTEM 1 I Not used 59 THEM_DET I

Temp. sensor detection [Detection : H] 60 (AMP_PRO2) - GND 61 AMP_PRO1 I Not used 62 EE_CDS I Not used 63 KEY_IN1 I Not used 64 KEY_IN2 I Not used

1-10 (No.YA099)

SECTION 3

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

DISASSEMBLY

3.1 SYSTEM SETTEING

When the DIGITAL SIGNAL PWB is replaced or the DIGITAL INPUT is not normal, SYSTEM SETTING in the following procedure.

(1) Press the [SLEEP TIMER] key, and set it to 0 minutes. (2) Press the [DISPLAY] key and the [VIDEO STATUS] key

simultaneously, then the SERVICE MENU screen will be displayed.

(3) In the SERVICE MENU, press the [2] key. Then, the SELF-

CHECK screen will be displayed.

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

remote control unit.

SERVICE MENU SCREEN

SERVICE MENU

1.ADJUST

2.SELF_CHK

3.I2C STOP

SELF-CHECK 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

SOLDER SIDE

RECEIVER PWB

IC3106

Masking tape

Fig. 2

3.2.1 REMOVING THE REAR COVER (Fig.3)

(1) Remove the power cord. (2) Remove the 4 screws [A], and remove the STAND COVER. (3) Remove the 2 screws [B] and the 6 screws [C]. (4) Remove the TABLE TOP STAND. (5) Remove the 15 screws [D], the 4 screws [E], the 8 screws

[F], and remove the REAR COVER.

CAUTION:

• Prior to starting the work, be sure to read the following written

instructions on the CAUTION LABEL attached to the REAR COVER.

Fig. 1

3.2 DISASSEMBLY PROCEDURE

CAUTION:

• When exchanging parts etc. with the front side (PDP side)

facing down, please place a protection sheet below before starting, so as to prevent scratches on the front side.

• Pay extra attention in the following matter when turning the

power on with the REAR COVER removed. (1) Prior to disassembly, unplug the power cord from the AC

outlet without fail. (Turn the power "off".)

(2) Make sure that the

RECEIVER PWB: IC3106

covered with black masking tape. (Fig.2)

(3) Make sure to remove the masking of

IC3106

when attaching the REAR COVER.

(4) Do not turn the power on until the REAR COVER is

attached properly, after the masking is removed.

is completely

RECEIVER PWB:

3.2.2 REMOVING THE TERMINAL COVER AND CENTER COVER (Fig.3)

• Remove the REAR COVER.

(1) Remove the 7 screws [G], and remove the CHASSIS

SHIELD COVER.

(2) Remove the 6 screws [H], and remove the CENTER

COVER.

(3) Remove the 6 screws [I], the 12 screws [J], the 1 screw

[K], the 1 nut [L], the 1 washer [M], and remove the TERMINAL COVER.

(No.YA099) 1-11

+ 23 hidden pages

JVC PD-42V475/S, PD-42V485/S Service Manual

PDP COLOR TELEVISION

TABLE OF CONTENTS

SPECIFICATION

1. 1 SAFETY PRECAUTIONS

1.2 INSTALLATION

1. 3 PRECAUTIONS REGARDING PDP

2.1 FEATURES

2. 2 MAIN DIFFERENCE LIST

2. 3 TECHNICAL INFORMATION

3.1 SYSTEM SETTEING

3.2 DISASSEMBLY PROCEDURE