JVC AV48WP55 Service Manual

SERVICE MANUAL

REAR PROJECTION TELEVISION

YA09720045

AV-48WP55/H, AV-56WP55 AV-65WP55

/H,

BASIC CHASSIS

[AV-65WP55]

TABLE OF CONTENTS

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

2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13

4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-26

5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-66

No.YA097

2004/5

SPECIFICATION

Items Contents

AV-48WP55 AV-56WP55 AV-65WP55

Dimensions (W × H × D) 120cm × 124cm × 60.8cm

(47-1/4" × 49" × 24")

Mass 82 kg ( 181 lbs ) 93.2 kg ( 205.7 lbs ) 108.7 kg ( 239.7 lbs ) TV RF System CCIR (M) Color System NTSC Sound System BTSC system (Multi Channel Sound) Teletext System Closed caption (T1-T4 / CC1-CC4) Receiving Channels

and Frequency

CATV Receiving Channels and Frequency

TV / CATV Total Channel 180 Channels Intermediate

Frequency Color Sub Carrier 3.58MHz Power Input AC 120V, 60Hz Power Consumption 248W (Max) Screen Transparent screen (unitized fresnel lens / double lenticular lens) Screen Size 48" (122cm)

Projection Tube 17cm (6.7") tube × 3 ( R/G/B )

High Voltage 31kV+1.0kV/-1.3kV (at zero beam current)

Speaker 13cm round type × 2

Audio Power Output 10W+10W

Antenna Terminal 75Ω unbalanced, F-type connector × 1

External Input (1/2/3/4)

Digital Input

[AV-65WP55]

Audio Output (FIX) 500mV(rms) (-4dBs), low impedance (1kHz when modulated 100%)

AV Compulink lll 3.5mm mini jack × 1 Remote Control Unit RM-C1257G (AA/R6/UM-3 battery × 2)

Design & specifications are subject to change without notice.

Component Video

VHF Low

VHF High

UHF

CATV 54MHz~804MHz

Video IF

Sound IF

[INPUT-1/2] 720p/1080i

480i/480p

S-Video

[INPUT-1/3/4]

Video Audio

Video

Audio

02ch~06ch : 54MHz~88MHz 07ch~13ch : 174MHz~216MHz 14ch~69ch : 470MHz~806MHz

Low Band : 02~06 High Band : 07~13 Mid Band : A~I by 14~22 Super Band : J~W by 23~36 Hyper Band : W+1~W+28 by 37~64 Ultra Band : W+29~W+58, W+59~W+84 by 65~94, 100~125 Sub Mid Band : A-8, A-4~A-1 by 01, 96~99

45.75MHz

41.25MHz (4.5MHz)

Measured diagonally 16:9 ratio (W:106.3 cm, H:59.8 cm)

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

Pb/Pr : ±0.35V, 75Ω Y : 1V (p-p) Positive (Negative sync provided), 75Ω Pb/Pr : 0.7V, 75Ω Mini-DIN 4pin × 3 Y: 1V (p-p) positive (negative sync provided), 75Ω

C: 0.286V(p-p) (burst signal)

1V (p-p) positive (negative sync provided), 75Ω (RCA pin jack × 4) 500mV(rms) (-4dBs), high impedance (RCA pin jack × 9)

HDMI connector (Digital-input terminal is not compatible with computer signal) Digital : HDMI connector

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

(RCA pin jack × 2)

136.8cm × 138.6cm × 66.7cm (53-7/8" × 54-5/8" × 26-3/8")

56" (142cm) Measured diagonally 16:9 ratio (W:124 cm, H:69.8 cm)

156.6cm × 149.5cm × 72.8cm (61-3/4" × 58-7/8" × 28-3/4")

65" (165cm) Measured diagonally 16:9 ratio (W:143.9 cm, H:81.0 cm)

1-2 (No.YA097)

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) Use isolation transformer when hot chassis.

The chassis and any sub-chassis contained in some products are connected to one side of the AC power line. An isolation transformer of adequate capacity should be inserted between the product and the AC power supply point while performing any service on some products when the HOT chassis is exposed.

(5) Don't short between the LIVE side ground and ISOLATED (NEU-

TRAL) 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.

(6) If any repair has been made to the chassis, it is recommended that

the B1 setting should be checked or adjusted (See B1 POWER SUPPLY check).

(7) The high voltage applied to the picture tube must conform with that

specified in Service manual. Excessive high voltage can cause an increase in X-Ray emission, 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 minimum level of soft X-Ray emission, components in the high voltage circuitry including the picture tube must be the exact replacements or alternatives approved by the manufacturer of the complete product.

(8) 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 10k

(9) 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.

Ω 2W resistor to the anode button.

(10) 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 1100V AC (r.m.s.) for a period of one second.

(. . . . Withstand a voltage of 1100V AC (r.m.s.) to an appliance rat-

ed 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 1000 following manner. Connect a 1500 a 0.15

µF AC-type capacitor between an exposed metal part

Ω per volt or more sensitivity in the

Ω 10W resistor paralleled by

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

(11) High voltage hold down circuit check.

GOOD EARTH GROUND

ON EACH EXPOSED ME TAL PAR T

After repair of the high voltage hold down circuit, this circuit shall be checked to operate correctly.See item "How to check the high voltage hold down circuit".

This mark shows a fast operating fuse, the letters indicated below show the rating.

A V

POWER CORD REPLACEMENT WARNING.

Connecting the white line side of power cord to "WHT" character side.

PWB

White line side

WHT

(No.YA097)1-3

1.2 INSTALLATION [ AV-65WP55 ]

1.2.1 REMOVING THE UPPER UNIT FROM THE LOWER UNIT

1.2.1.1 TYPES AND PLACES OF SCREWS

• Be careful not to confuse the following four types of screws.

Type

Ref. Place for attaching screws Quantity Color Shape A A A B C D

Front panel bracket Rear cover bracket Rear cover (for attaching the body) Inside the Front door (in the jack part) Rear cover (for attaching the body bracket) Rear cover (for attaching the speaker panel)

4 2 2 2 2 4

FRONT SIDE

Black

Gold

Black

diameter of 4mm-length of 18mm, acute tip

diameter of 3mm-length of 12mm, flat tip diameter of 4mm-length of 12mm, flat tip diameter of 4mm-length of 20mm, flat tip

A : diameter of 4mm - length

of 18mm, black, acute tip

REAR SIDE

D : diameter of 4mm - length

of 20mm, black, flat tip

B : diameter of 3mm - length of 12mm, black, flat tip

A : diameter of 4mm - length

of 18mm, black, acute tip

C : diameter of 4mm - length

of 12mm, gold, flat tip

A : diameter of 4mm - length

of 18mm, black, acute tip

1-4 (No.YA097)

A : diameter of 4mm - length

of 18mm, black, acute tip

D : diameter of 4mm - length

of 20mm, black, flat tip

1.2.1.2 DISASSEMBLY PROCEDURE

• Make sure that the power cord is pulled out from the AC wall socket. (1) Remove the 2 screws [ A ] on the left rear side of the set,

and then remove the rear cover bracket. [Fig.1]

(2) Remove the 2 screws [ B ] inside of the front door. [Fig.2]

* The screws attach the speaker grill.

(3) Remove the 2 screws [ D ] on the left edge of the rear

cover, and remove the 2 screws [ D ] on the right edge of the rear cover. [Fig.2] * The screws attach the speaker grill.

(4) Pull the speaker grill in front direction, and remove the

speaker grill. [Fig.2]

(5) Remove the 2 screws [ A ] on the left front panel bracket,

and remove the 2 screws [ A ] on the right front panel bracket. [Fig.2]

(6) Remove 1 screw [ C ] on the left edge of the rear cover, and

1 screw [ C ] on the right edge of the rear cover. [Fig.3]

(7) Remove 1 screw [ A ] on the left side of the rear cover, and

remove 1 screw [ A ] on the right side of the rear cover. [Fig.3]

(8) Move the rear cover approx. 3cm in rear direction. Then,

remove the upper unit from the lower unit by lifting the upper unit slowly. [Fig.3]

•VOID seal [ a ] attached to the left front panel bracket in order to confirm that a person except JVC installation workers has disassembled the set. This seal is removed when the upper unit is removed, and the letters of "VOID" appears in the place where the seal. [Fig.2]

• Two or more people are required to move the upper unit.

• Reflecting mirror is attached to the upper unit. So, handle it carefully so as to protect it from shocks.

• In placing the upper unit on the ground, be careful not to insert the connector for the auto-convergence on the right side of the upper unit between the upper unit and the ground.

• In placing the upper unit on the ground, be careful not to insert dust inside the upper unit.

• Be careful not to hurt yourself because metal brackets for attaching the front panel are on the ceiling part of the lower unit.

(9) Cover the lower unit with the Top Sheet in order not to

insert dust in the lower unit. Top Sheet is the one used for package. [Fig.4]

Fig.2

SPEAKER GRILL

UPPER

UNIT

LOWER

UNIT

Fig.3

TOP SHEET

Fig.1

REAR COVER

BRACKET

Fig.4

(No.YA097)1-5

1.2.1.3 REASSEMBLY PROCEDURE

• Make sure that power cord is pulled out from the AC wall socket.

• Remove the Top Sheet which covers the lower unit. (1) Lift the upper unit slowly, and then place the upper unit on

the lower unit.

• In placing the upper unit on the lower unit, be careful not to insert the connector for the auto-convergence on the left side of the upper unit between the upper unit and the lower unit.

(2) Adjust the front side of the upper unit to the brackets on the

lower unit for attaching the upper unit.

(3) Attach 2 screws [ A ] to the both side of the rear cover.

[Fig.2]

(4) Attach 2 screws [ A ] to the both edge of the rear cover.

[Fig.2] (5) Attach the 4 screws [ A ] to the front panel bracket. [Fig.2] (6) Attach the VOID seal [ b ] on the front right side of the set

to the right front panel bracket. [Fig.5] (7) Attach the 2 screws [ B ] to the front door. [Fig.2] (8) Attach the speaker grill to the front side. (9) Attach 4 screws [ D ] to the both edge of the rear cover.

[Fig.2]

(10) Attach the 2 screws [ B ] to the front door.[Fig.2]

• Make sure that all the screws are attached certainly in order to fix the upper unit.

• After assembly procedure is completed, make sure that there is no dust in the inner side of the screen.

Fig.5

1-6 (No.YA097)

1.2.2 INSTALLATION SITE

(1) The rear of this set is provided with ventilation openings.

Install the set more than 5 cm from a wall and in a location with good ventilation.

(2) Avoid the following types of locations.

a) Unstable locations (location must be able to

withstand heavy weight). b) Locations subjected to direct sunlight. c) Near stoves or other heating devices. d) Locations subjected to humidity or oily smoke. e) Dusty locations.

f) Locations with strong vibration.

1.2.3 INSTALLATION ADJUSTMENT

When installing, moving or changing the orientation of the set, perform static convergence adjustment according to the following procedure. Adjusting CRT color convergence have MANUAL and RESET. It adjust on the MENU screen.

NOTE :

Please have you TV on for at least 20 minutes before sing this feature. This adjustment will be needed only when the colors of the characters/lines are separated and lack in distinction. If not, please don't perform the adjustment.

MANUAL

(1) Press the [MENU] key, and select the

"CONVERGENCE" in the INITIAL SETUP menu with [function up/down] key.

(2) Press the [function left/right] key, the CONVERGENCE

menu appears.

(3) Press the [function up/down] key, and select the

"MANUAL".

(4) Press the [function left/right] key, then CONVERGENCE

adjustment screen appear. [Fig.1]

• If all the crosses are white, no convergence adjustment is needed.

(5) Select the location you want to adjust by using the

[number (2/4/5/6/8)] keys on the remote control unit. [Fig.2]

(6) Press the [SELECT] key to change the color of the box

to the color of the cross you want to adjust (red or blue).

• You cannot adjust the green cross.

(7) Use the [function up/down] key and the [function left/

right] keys to adjust the position of the cross.

(8) Adjust the three colors crosses until they overlap and

appear as a single white cross.

(9) Press the [OK] key.

NOTE :

• When you adjust the convergence, make sure you start with the center position (position 5), and work your way around radial for best results.

• When you make the adjustment in the center (positions 5), you are making the adjustment for the whale screen. In other positions, you are making the adjustment only in that area.

• You can reset the adjustment if you do not like the results, See below.

(10) Press the [menu] key to end the convergence

adjustment procedure.

(more than 5cm)

Wall

VENTILATION OPENING

RESET

RESET in the CONVERGENCE menu resets all convergence adjustments to the factory default setting.

Fig.1

Fig.2

(No.YA097)1-7

SECTION 2

S-VIDEO

VIDEO

OPERATE

/ MONO

SPECIFIC SERVICE INSTRUCTIONS

2.1 FEATURES

• Rear Projection HDTV.

• 3-2 PULL DOWN : You can enjoy DVD movies at the highest picture quality.

• MOTION COMPENSATION : With this function, the seamless reproduction of dynamic motion on the screen has been realized.

• Bullet-in DSD (Digital Super Detail) circuit and 3 dimension Y/C separate circuit.

• Receive DTV broadcast (1080i / 720p / 480p / 480i)

• Built-in Component (Y / Pb / Pr) input.

• Built-in A.H.S. circuit.

2.2 DIFFERENCE LIST

Item AV-48WP55 AV-56WP55 AV-65WP55

DIGITAL INPUT TERMINAL --- --- available

2.3 FUNCTIONS

FRONT CONTROL KEY & TERMINAL

MENU button ( OPERATE ٕ )

OPERATE

CHANNERL -/+ button ( OPERATE / )

VOLUME -/+ button

MAIN POWER button

POWER LED (Blue)

INPUT4 terminal ( S-VIDEO / VIDEO / AUDIO )

REAR TERMINAL

UNPLUG THE POWER CORD FROM AC OUTLET BEFORE REMOVING THE REAR COVER

When the rear cover is removed, follow "CAUTION AT DISASSEMBLY" procedure in the service manual before plugging the TV's power cord into an AC outlet. Failure to follow the procedure will result in PERMANENT damage to some of the television features. DÉBRANCHEZ LE CORDON DE LA PRISE DE COURANT

C.A. AVANT DE RETIRER LE COUVERCLE ARRIÈRE. Une fois le couvercle arrière déposé suivez l procédure « ATTENTION LORS DU DÉMONTAGE » décrite dans une prise c.a. L'omission de suivre la procédure causera des dommages PERMANENTS à certaines fonctions du téléviseur.

Licensed from BBE Sound, Inc. under USP4638258, 4482866 and 5510752. BBE is a registered trademark of BBE Sound, Inc. Sous licence de BBE Sound, Inc. BBE est une marque de fabrique déposée de BBE Sound, Inc. Autorizado con licencia de BBE Sound, Inc. BBE es une marca comercial registrada de BBE Sound, Inc.

75 (VHF/UHF)

AV COMPULINK

S-VIDEO

CENTER CHANNEL INPUT

AUDIO OUT

AUDIO VIDEO

VIDEO

INPUT4

1 2

INPUT-3

INPUT-2

INPUT-1

L / MONO

[AV-65WP55]

DIGITAL IN

OVER

S-VIDEO

AUDIO (ANALOG)

VIDEO (DIGITAL)

AUDIO (DIGITAL)

COMPONENT VIDEO

DIGITAL IN terminal [AV-65WP55] ( HDMI connector : VIDEO / AUDIO )

AUDIO INPUT (For DIGITAL IN) terminal [AV-65WP55]

INPUT-1 terminal ( S-VIDEO / VIDEO / AUDIO )

INPUT-2 terminal ( VIDEO / AUDIO )

INPUT-1INPUT-2

INPUT-3 terminal ( S-VIDEO / VIDEO / AUDIO )

INPUT-1 COMPONENT VIDEO terminal ( Y / Pb / Pr )

INPUT-2 COMPONENT VIDEO terminal ( Y / Pb / Pr )

CENTER CHANNEL INPUT terminal

AUDIO OUT terminal

673 491011 5

AV COMPULINK

Antenna terminal ( VHF / UHF )

1-8 (No.YA097)

REMOTE CONTROL UNIT [RM-C1257G]

MULTI SCREEN

FREEZE

SWAP

SELECT

C.C.INDEXTWIN

INPUT

POWER key

VCR / DVD switch

TV / CATV switch

MULTI SCREEN operation keys

DISPLAY key

SLEEP TIMER key

SOUND

TUNE

ASPECT

LIGHT

BACK

SOUND key

VIDEO STATUS key

THEATER PRO key

ASPECT key

MUTING key (memory key)

VOL+/- (/) keys

MENU key

C.C.(Closed Caption) key

RM-C1257G

INPUT key

Number (1~0) keys

RETURN+ key

TUNE key

LIGHT key

OK key

CH+/- (/) keys

BACK key

VCR / DVD operation keys

(No.YA097)1-9

2.4 TECHNICAL INFORMATION

2.4.1 MAIN MICRO COMPUTER (CPU) FUNCTION (MN102H75K)

Pin No. Pin name I/O Function

1 NC O --------

2 /MICON_V I V.sync for OSD

3 LB_PRO I

Low B protection detection [Protection:H]

4 NC - --------

5 /RST I Main CPU reset [Reset:L]

6 NC O --------

7/TEST I+3.3V

8 OSD_YS O OSD Ys (blanking)

9SDA4 I/OI

C bus (data) for JCC5055

10 NC O --------

11 A_MU O Audio muting [Muting:H]

12 /MICON_H I H sync for OSD

13 NC O --------

14 P46,OSDXI I Oscillation for OSD

15 P45,OSDXO O Oscillation for OSD

16 SDA2 I/O I

C bus (data) for MTS

17 AC-IN I AC for timer count

18 SCL2 O I

C bus (clock) for MTS

19 NC O --------

20 VCOI I LPF

21 PDO O LPF

22 /IP_RESET O Reset for DIST [Reset:L]

23 OSD_YM O OSD Ym (transparence)

24 OSD_B O OSD blue

25 POWER_LED O

Lighting for POWER LED [HIGH / ON:H]

26 OSD_G O OSD green

27 OSD_R O OSD red

28 VREF I Reference voltage for OSD

29 IP_ERR I DIST program load detect.

30 IREF I Reference current for OSD

31 COMP I Phase adjust for OSD

32 AVDD I +3.3V

33 CLL I Clamp low level

34 VREFLS I Reference voltage for SUB CCD

35 SUB_CCD I

Video for sub closed caption decoder

36 NC - --------

37 VSS I GND

38 MAIN_CCD I

Video for main closed caption decorder

39 VREFHS I Reference voltage for MAIN CCD

40 CLH I Clamp high level

41 VDD/VPP I +3.3V

42 SCL4 O I

C bus (data) for JCC5055

Pin No. Pin name I/O Function

43 NC O --------

44 ON_TIM O

Lighting for on timer operating [LOW / ON:H]

45 SBO 0 O Convergence control [RXD]

46 SBD 0 I Convergence control [TXD]

47 SBT1 I --------

48 AP_DATA - --------

49 BS_RST - --------

50 SQR - --------

51 BS1.5CTL - --------

52 NC O --------

53 NC O --------

54 DC_COTL O Black level DC reproduce control

55 NC O --------

56 NC O --------

57 NC O --------

58 /LOB_POW O LowB power control [Power on:L]

59 COMPULINK I AV COMPULINK III control

60 /POWERGOOD I Power condition check

61 /MECA_ON I Machine SW interrupt [Pushing:L]

62 /MAIN_POW O Main power control [Power on :L]

63 NC - --------

64 /B1 POW O B1 power control [Power on:L]

65 AFC I AFT voltage

66 X_RAY I

X-ray protection detection

[Protection : 2.0V]

67 SPRIT O NC

68 KEY2 I Front key scan 2 (CH+, VOL-/+)

69 KEY1 I Front key scan 1 (MENU, CH-)

70 SCL1 O I

71 SDA1 I/O I

C bus (clock) for EEP-ROM

C bus (data) for EEP-ROM

72 REMO I Remote control

73 NC O --------

74 VSS I GND

75 OSC2 O 4MHz oscillation for system clock

76 OSC1 I 4MHz oscillation for system clock

77 VDD I +3.3V

78 SCL0 O I

C bus (clock) for general

79 AP_CLK O --------

80 SDA0 I/O I

C bus (data) for general

81 NC O --------

82 NC O --------

83 NC - --------

84 P_MU O Picture muting [Muting:H]

1-10 (No.YA097)

2.5 MAIN PARTS LOCATION

2.5.1 PWB ASS'Y ARRANGEMENT

The PWB ASS'Y is indicated below.

PWB ASS'Y name AV-48WP55H AV-56WP55H AV-65WP55H

MAIN PWB ASS'Y SRP-1012A-M2 SRP-1013A-M2 SRP-1002A-M2

MI-COM & DIST MODULE PWB ASS'Y SRP0D001A-M2 ←← POWER PWB ASS'Y SRP-9001A-M2 ←← DEF / CONVERGENCE OUT PWB ASS'Y SRP-2012A-M2 ← SRP-2013A-M2

DIGITAL CONVERGENCE MODULE PWB ASS'Y SRP0K012A-M2 SRP0K013A-M2 SRP0K014A-M2

DIGITAL INPUT MODULE PWB ASS'Y --- --- SRP-7812A-M2

FRONT CONTROL PWB ASS'Y SRP0L012A-M2 ←← REMOCON SENSOR PWB ASS'Y SRP-8001A-M2 ←← VM PWB ASS'Y SRP-7201A-M2 ←← R CRT SOCKET PWB ASS'Y SRP-3101A-M2 ←← G CRT SOCKET PWB ASS'Y SRP-3201A-M2 ←← B CRT SOCKET PWB ASS'Y SRP-3301A-M2 ←←

PROJECTION UNIT

FRONT CONTROL ASS'Y

B CRT SOCKET PWB

G CRT SOCKET PWB

MI-COM & DIST MODULE PWB

MAIN PWB

FRONT CONTROL PWB

DIGITAL INPUT MODULE PWB [AV-65WP55]

R CRT SOCKET PWB

REMOCON SENSOR PWB

VM PWB

DIGITAL CONVERGENCE MODULE PWB

DEF / CONVERGENCE OUT PWB

POWER PWB

AV TERMINAL BOARD

(This figure is only MAIN UNIT)

(No.YA097)1-11

2.6 SCREEN HANDLING CAUTIONS

2.6.1 SCREEN STORAGE Store the SCREEN ASS'Y in a standing position in order to avoid deformation. If the screen is stored horizontally, there is risk of

deforming the screen face. When necessary to place the SCREEN ASS'Y horizontally, position the screen side upwards and sure to place spacers between the screen and resting site (floor or stand etc.) to prevent the screen from sagging.

2.6.2 SCREEN SURFACE

Since the screen surface is easily scratched or soiled, use ample care when handling.

DISASSEMBLY PROCEDURE

If the screen or screen panel need to be replaced, remove the 14 (48 inch) / 20 (56 inch, 65 inch) screws A.

FRONT PANEL

SCREEN BRACKET

(TOP)

SCREEN

BRACKET

(LEFT)

(x 14) [48 inch] (x 20) [56 inch, 65 inch]

Leave the screen with protector, fresnel lens and double lenticular lens attached. If cannot be disassembled further.

SCREEN

SCREEN BRACKET

(RIGHT)

56 inch 65 inch only

SCREEN BRACKET

(BOTTOM)

2.7 PROJECTION UNIT REPLACEMENT

2.7.1 ADJUSTMENT DURING REPLACEMENT

When replacing the three R, G and B projection units, first replace the R and B units and perform focus / screen / raster centering adjustments with reference to the G unit. Then replace the G unit and perform G focus / screen / convergence adjustment. Finally perform R & B . Convergence adjustments. Use care to simultaneously removes all three-projection units.

2.7.2 DISASSEMBLY CAUTION

The projection units include locations that are not to be disassembled during service. When replacing projection unit parts, disassemble to the state indicated in the figure below. The figure indicates screws and wires that are not to be removed. Use care not to remove these.

Deflection yoke wires : to connector on DEF / CONVERGENCE OUT PWB ASS'Y. [R="RHV", G="GHV", B="BHV"] Convergence yoke wires : to connector on DEF / CONVERGENCE OUT PWB ASS'Y. [R="R", G="G", B="B"]

LENS ASS'Y SCREW ( x 4)

1-12 (No.YA097)

Check that tape is applied to the CRT neck. If absent, the deflection yoke can dislodge.

Do not remove screws

LENS ASS'Y

R CRT SOCKET PWB ASS'Y G CRT SOCKET PWB ASS'Y B CRT SOCKET PWB ASS'Y

2/4 POLE MAGNET

TAPE

VM PWB (G only)

ANODE wires : to DIVIDER

DEF. / CONVER. YOKE

CRT ASS'Y (COUPLER ASS'Y)

Do not disassembly

SECTION 3

DISASSEMBLY

3.1 DISASSEMBLY PROCEDURE [AV-65WP55]

• Make sure that the power cord is pulled out from the AC wall socket.

3.1.1 SPEAKER GRILLE

(1) Remove 2 screws [ A ] from rear side. (2) Open the door of the FRONT CONTROL BOX and remove

2 screws [ B ] from front side.

(3) Take out the SPEAKER GRILLE.

3.1.2 SPEAKER

• Take out the SPEAKER GRILLE. (1) Remove 4 screws [ C ]. (2) Take out the SPEAKER. (3) Disconnect the speaker wire from speaker terminal.

*Remove the both side SPEAKER same manner.

3.1.3 FRONT BOARD

• Take out the SPEAKER GRILLE. (1) Remove 4 screws [ D ]. (2) Take out the FRONT BOARD.

3.1.4 FRONT CONTROL BOX

• Take out the SPEAKER GRILLE. (1) Remove 2 screws [ E ]. (2) Remove 2 screws [ F ]. (3) Disconnect the connector [BH], [R], [BG] on the FRONT

CONTROL PWB.

(4) Take out the FRONT CONTROL BOX.

3.1.5 FRONT CONTROL PWB

• Take out the SPEAKER GRILLE.

• Take out the FRONT CONTROL BOX. (1) Remove 2 screws [ G ]. (2) Remove 3 screws [ H ] from rear side of FRONT CONTROL

BOX.

(3) Take out the FRONT CONTROL PWB.

SPEAKER

WIRE

SPEAKER

SPEAKER GRILL

FRONT

CONTROL PWB

FRONT

CONTROL BOX

FRONT BOARD

Fig.1

FRONT

CONTROL BOX

AV TERMINAL BOARD

POWER CORD

CAUTION AT DISASSEMBLY

DIGITAL INPUT MODULE [AV-65WP55]

1 3

2 4

SB connector

Fig.2

Prior to disassembly, unplug the power code from the AC outlet without fail. (Turn the power "off".) Short the SB connector [1] pin and [2] pin of the DIGITAL INPUT MODULE. (At the time of assembling) Before the rear panel is inserted into the cabinet, release the short-circuit between the SB connector [1] pin and [2] pin of the DIGITAL INPUT MODULE. After releasing the short-circuit between the SB connectors, do not turn the power on until the rear panel is inserted into the cabinet. Negligence in carrying out the above steps may cause the inactivation of the TV.

(No.YA097)1-13

3.1.6 SCREEN ASS'Y

• Take out the SPEAKER GRILLE.

• Take out the FRONT CONTROL BOX. (1) Remove 4 screws [ I ] attaching the FRONT BRACKET. (2) Remove 10 screws [ J ] from rear side. (3) Take out the SCREEN ASS'Y.

NOTE :

• Please place the SCREEN ASS'Y on a flat table without fail.

• Because of the large size, at least two parsons are

recommended for removal and reassemble.

• Use care not to scratch the screen during work.

• During assembly, be sure to engage the left and right tabs

with the cabinet mounting positions.

• When than sporting the SCREEN ASS'Y, avoid grasping the

top of the screen panel, instead grasp the left and right areas.

3.1.7 MIRROR

• Take out the SPEAKER GRILLE.

• Take out the FRONT CONTROL BOX.

• Take out the SCREEN ASS'Y. (1) Remove 10 screws [ K ] attaching the mirror brackets of the

upper, left and right side.

(2) Raise slightly to disengage of the mirror from the bottom

bracket. (If necessary, loosen the screws attaching the bottom bracket)

(3) Take out the MIRROR.

NOTE :

• The MIRROR is frontcoated. Do not touch the front of the MIRROR.

• At least 2 persons are recommended for removable and reassemble.

SCREEN ASS'Y

Fig.3

MIRROR

BRACKET

MIRROR BRACKET

1-14 (No.YA097)

Fig.4

3.1.8 REAR PANEL

(1) Remove 3 screws [ L ]. (2) Remove 4 screws [ M ]. (3) Take out the REAR PANEL.

NOTE :

• Before the rear panel is inserted into the cabinet, release the short-circuit between the [SB] connector (1) pin and (2) pin of the DIGITAL INPUT UNIT. (Refer to "CAUTION AT DISASSEMBLY" on Page 13).

• After releasing the short-circuit between the [SB] connectors, do not turn the power on until the rear panel is inserted into the cabinet.

• Prior to starting the work, be sure to read the following written instructions on the CAUTION LABEL attached to the REAR PANEL.

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

written instructions on the CAUTION LABEL attached to the REAR PANEL.

UNPLUG THE POWER CORD FROM AC OUTLET BEFORE OPEN THE REAR COVER (PANEL). When the rear cover (panel) is removed, follow "CAUTION AT DISASSEMBLY" procedure in the service manual before plugging the TV's power cord into an AC outlet. Failure to follow the procedure will result in PERMANENT damage to some of the television features.

PARTITION

REAR PANEL

REAR COVER

BRACKET

Fig.5

3.1.9 PARTITION

• Take out the REAR PANEL. (1) Pull out the PARTITION backward.

3.1.10 REAR COVER

• Take out the SPEAKER GRILLE.

• Take out the FRONT CONTROL BOX.

• Take out the SCREEN ASS'Y. (1) Remove 2 screws [ N ]. (2) Take out the REAR COVER BRACKET. (3) Remove 2 screws [ O ]. (4) Remove 2 screws [ P ] from front side. (5) Slightly pull for backside to disengage of the REAR COVER

from hooks.

(6) Take out the REAR COVER.

NOTE :

• Because of the large size, at least two persons are

recommended for removal and reassemble.

REAR COVER

BRACKET

HOOK

Fig.6

(No.YA097)1-15

3.1.11 MAIN UNIT

• Take out the SPEAKER GRILLE.

• Take out the FRONT PANEL.

• Take out the REAR PANEL. (1) Remove 4 screws [ Q ] from front side. (2) Take out the connector [BH], [R], [BG] on the FRONT

CONTROL PWB.

(3) Remove 2 screws [ R ] attaching the MAIN CHASSIS and

BODY.

(4) Pull out the MAIN UNIT rear side.

NOTE :

• Except for confirmation of projection of images on the screen and audio output through the speakers, the removed MAIN UNIT is still workable in the same state as if it is still built in the TV set. Therefore, the MAIN UNIT can be removed, if necessary, for board diagnosis, electric testing, etc. apart from confirmation of screen images and audio output.

• When wire clamps are removed during work, use care to restore them precisely to their original positions. Performance can be affected if these are not returned to the original positions.

• Because of the large size, at least two persons are recommended for removal and reassemble.

• When carrying the MAIN UNIT, use care not to drop, shock or shake it.

• Do not stain or damage the lens of the PROJECTION UNIT.

• Do not look the projection side of a PROJECTION UNIT when the image is projected.

BODY

FOCUS PACK

SPEAKER

WIRE

MAIN UNIT

SPEAKER

WIRE

SPEAKER CONNECTOR

Fig.7

3.1.11.1 CHECKING THE P.W. BOARD

When checking the MAIN PWB, POWER PWB, DEF & CONVERGENCE OUT PWB, etc., raise the MAIN UNIT with the front side down for the make of convenience.

3.1.12 FOCUS PACK

• Take out the MAIN UNIT. (1) Remove 1 screw [ S ]. (2) Take out the FOCUS PACK. (3) Take out 9 wires connecting the FOCUS PACK.

3.1.13 AV TERMINAL BOARD

• Take out the REAR PANEL. (1) Remove 4 screws [ T ]. (2) Pull out the POWER CORD CLAMP from AV TERMINAL

BOARD right side.

(3) Disconnect the connector [AU], [DC], [Q] and [SR] on the

DIGITAL INPUT MODULE PWB.

(4) Take out the AV TERMINAL BOARD.

3.1.14 DIGITAL INPUT MODULE

• Take out the AV TERMINAL BOARD. (1) Remove 1 screw [ U ]. (2) Remove 2 screws [ V ] from rear side of the AV TERMINAL

BOARD.

(3) Take out the DIGITAL INPUT MODULE.

NOTE:

• When removing the DIGITAL INPUT MODULE, refer to the "CAUTION AT DISASSEMBLY" section on page 13.

MAIN

CHASSIS

AV TERMINAL

BOARD

DIGITAL INPUT

MODULE

POWER CORD

1-16 (No.YA097)

Fig.8

3.1.15 MAIN CHASSIS

• Take out the REAR PANEL. (1) Remove 2 screws [ W ]. (2) Remove 2 screws [ R ]. (3) Pull out the MAIN CHASSIS for backside.

NOTE:

• If necessary, remove the anode wires, connectors, respectively.

3.1.16 MI-COM & DIST MODULE PWB

• Take out the REAR PANEL.

• Take out the MAIN CHASSIS. (1) Disconnect the connector [ CN000E ], [ CN000Y ] on the

MI-COM & DIST MODULE PWB. (2) Remove 2 screws [ X ]. (3) Take out the MI-COM & DIST MODULE PWB.

MI-COM & DIST

MODULE PWB

3.1.17 DIGITAL CONVERGENCE MODULE PWB

• Take out the REAR PANEL.

• Take out the MAIN CHASSIS. (1) Remove 2 screws [ Y ]. (2) Take out the DIGITAL CONVERGENCE MODULE PWB.

3.1.18 PROJECTION UNIT

• Take out the SPEAKER GRILLE.

• Take out the FRONT CONTROL BOX.

• Take out the REAR PANEL.

• Take out the MAIN UNIT. (1) Take out the CRT SOCKET PWB. (2) Remove 4 screws [ Z ]. (3) Pull out the PROJECTION UNIT upward.

NOTE :

• Refer to "PROJECTION UNIT REPLACEMENT" on page 1-12 when taking out and replacing the PROJECTION UNIT.

• When wire clamps are removed during work, use care to restore them precisely to their original positions. Performance can be affected if these are not returned to the original positions.

3.1.19 HV DIVIDER

• Take out the REAR PANEL. (1) Remove 1 screw [ a ]. (2) Take out the HV DIVIDER.

*Wires of the transformer (FBT) and CRT of each PROJECTION UNIT can be removed by turning the connector portions.

NOTE :

• If necessary, remove the anode wires, and replacing the HV DIVIDER, take care to correctly engage the connector.

MAIN

CHASSIS

Turn

CONNECTOR

Pull

DIGITAL CONVERGENCE

MODULE PWB

Fig.9

PROJECTION UNIT

REMOCON

SENSOR PWB

HV DIVIDER

Fig.10

3.1.20 REMOCON SENSOR PWB

• Take out the REAR PANEL. (1) Disconnect the connector [ R ]. (2) Remove 1 screw [ b ]. (3) Take out the REMOCON SENSOR PWB.

(No.YA097)1-17

3.2 DISASSEMBLY PROCEDURE [AV-48WP55, AV-56WP55]

• Make sure that the power cord is pulled out from the AC wall socket.

3.2.1 SPEAKER GRILLE

(1) Remove 4 screws [ A ] from rear side. (2) Open the door of the FRONT CONTROL BOX and remove

2 screws [ B ] from front side.

(3) Take out the SPEAKER GRILLE.

3.2.2 SPEAKER

• Take out the SPEAKER GRILLE (1) Remove 4 screws [ C ]. (2) Take out the SPEAKER. (3) Disconnect the speaker wire from speaker terminal.

*Remove the both side SPEAKER same manner.

3.2.3 FRONT BOARD

• Take out the SPEAKER GRILLE. (1) Remove 4 screws [ D ]. (2) Take out the FRONT BOARD.

3.2.4 FRONT CONTROL BOX

• Take out the SPEAKER GRILLE. (1) Remove 4 screws [ E ]. (2) Disconnect the connector [BH], [R], [BG] on the FRONT

CONTROL PWB.

(3) Take out the FRONT CONTROL BOX.

3.2.5 FRONT CONTROL PWB

• Take out the SPEAKER GRILLE.

• Take out the FRONT CONTROL BOX. (1) Remove 2 screws [ F ]. (2) Remove 3 screws [ G ] from rear side of FRONT

CONTROL BOX.

(3) Take out the FRONT CONTROL PWB.

SPEAKER

SPEAKER GRILL

CONTROL PWB

WIRE

FRONT

CONTROL BOX

FRONT BOARD

Fig.1

3.2.6 SCREEN ASS'Y

• Take out the SPEAKER GRILLE.

• Take out the FRONT CONTROL BOX. (1) Remove 2 screws [ H ] attaching the FRONT BRACKET. (2) Remove 10 screws [ I ] from rear side. (3) Take out the SCREEN ASS'Y.

NOTE :

• Please place the SCREEN ASS'Y on a flat table without fail.

• Because of the large size, at least two parsons are recommended for removal and reassemble.

• Use care not to scratch the screen during work.

• During assembly, be sure to engage the left and right tabs with the cabinet mounting positions.

• When than sporting the SCREEN ASS'Y, avoid grasping the top of the screen panel, instead grasp the left and right areas.

FRONT

CONTROL BOX

Fig.2

SCREEN ASS'Y

Fig.3

1-18 (No.YA097)

3.2.7 MIRROR

• Take out the SPEAKER GRILLE.

• Take out the FRONT CONTROL BOX.

• Take out the SCREEN ASS'Y. (1) Remove 9 screws [ J ] attaching the mirror brackets of the

upper, left and right side.

(2) Raise slightly to disengage of the mirror from the bottom

bracket. (If necessary, loosen the screws attaching the bottom bracket)

(3) Take out the MIRROR.

NOTE :

• The MIRROR is frontcoated. Do not touch the front of the MIRROR.

• At least 2 persons are recommended for removable and reassemble.

3.2.8 REAR PANEL

(1) Remove 6 screws [ K ]. (2) Remove 4 screws [ L ]. (3) Take out the REAR PANEL.

3.2.9 PARTITION

• Take out the REAR PANEL. (1) Pull out the PARTITION backward.

MIRROR

BRACKET

MIRROR BRACKET

Fig.4

PARTITION

3.2.10 REAR COVER

• Take out the SPEAKER GRILLE.

• Take out the FRONT CONTROL BOX.

• Take out the SCREEN ASS'Y. (1) Remove 2 screws [ M ]. (2) Remove 2 screws [ N ] from front side. (3) Slightly pull for backside to disengage of the REAR COVER

from hooks.

(4) Take out the REAR COVER.

NOTE :

• Because of the large size, at least two persons are

recommended for removal and reassemble.

REAR PANEL

Fig.5

REAR COVER

HOOK

Fig.6

BRACKET

(No.YA097)1-19

3.2.11 MAIN UNIT

• Take out the SPEAKER GRILLE.

• Take out the FRONT PANEL.

• Take out the REAR PANEL. (1) Remove 4 screws [ O ] from front side. (2) Take out the connector [BH], [R], [BG] on the FRONT

CONTROL PWB.

(3) Remove 2 screws [ P ] attaching the MAIN CHASSIS and

BODY.

(4) Pull out the MAIN UNIT rear side.

NOTE :

• When wire clamps are removed during work, use care to restore them precisely to their original positions. Performance can be affected if these are not returned to the original positions.

• Because of the large size, at least two persons are recommended for removal and reassemble.

• When carrying the MAIN UNIT, use care not to drop, shock or shake it.

• Do not stain or damage the lens of the PROJECTION UNIT.

• Do not look the projection side of a PROJECTION UNIT when the image is projected.

BODY

FOCUS PACK

SPEAKER

WIRE

MAIN UNIT

SPEAKER

WIRE

SPEAKER CONNECTOR

Fig.7

3.2.11.1 CHECKING THE P.W. BOARD

When checking the MAIN PWB, POWER PWB, DEF & CONVERGENCE OUT PWB, etc., raise the MAIN UNIT with the front side down for the make of convenience.

3.2.12 FOCUS PACK

• Take out the MAIN UNIT. (1) Remove 1 screw [ Q ]. (2) Take out the FOCUS PACK. (3) Take out 9 wires connecting the FOCUS PACK.

3.2.13 AV TERMINAL BOARD

• Take out the REAR PANEL. (1) Remove 4 screws [ R ]. (2) Pull out the POWER CORD CLAMP from AV TERMINAL

BOARD right side.

(3) Disconnect the connector [AU], [DC], [Q] and [SR] on the

DIGITAL INPUT MODULE PWB.

(4) Take out the AV TERMINAL BOARD.

MAIN

CHASSIS

AV TERMINAL

BOARD

1-20 (No.YA097)

POWER CORD

Fig.8

3.2.14 MAIN CHASSIS

• Take out the REAR PANEL. (1) Remove 2 screws [ S ]. (2) Remove 2 screws [ P ]. (3) Pull out the MAIN CHASSIS for backside.

NOTE:

If necessary, remove the anode wires, connectors, respectively.

3.2.15 MI-COM & DIST MODULE PWB

• Take out the REAR PANEL.

• Take out the MAIN CHASSIS. (1) Disconnect the connector [ CN000E ], [ CN000Y ] on the

MI-COM & DIST MODULE PWB. (2) Remove 2 screws [ T ]. (3) Take out the MI-COM & DIST MODULE PWB.

MI-COM & DIST

MODULE PWB

3.2.16 DIGITAL CONVERGENCE MODULE PWB

• Take out the REAR PANEL.

• Take out the MAIN CHASSIS. (1) Remove 2 screws [ U ]. (2) Take out the DIGITAL CONVERGENCE MODULE PWB.

3.2.17 PROJECTION UNIT

• Take out the SPEAKER GRILLE.

• Take out the FRONT CONTROL BOX.

• Take out the REAR PANEL.

• Take out the MAIN UNIT. (1) Take out the CRT SOCKET PWB. (2) Remove 4 screws [ V ]. (3) Pull out the PROJECTION UNIT upward.

NOTE :

• Refer to "PROJECTION UNIT REPLACEMENT" on page 1-12 when taking out and replacing the PROJECTION UNIT.

• When wire clamps are removed during work, use care to restore them precisely to their original positions. Performance can be affected if these are not returned to the original positions.

3.2.18 HV DIVIDER

• Take out the REAR PANEL. (1) Remove 1 screw [ W ]. (2) Take out the HV DIVIDER.

*Wires of the transformer (FBT) and CRT of each PROJECTION UNIT can be removed by turning the connector portions.

NOTE :

• If necessary, remove the anode wires, and replacing the HV DIVIDER, take care to correctly engage the connector.

MAIN

CHASSIS

Turn

CONNECTOR

Pull

DIGITAL CONVERGENCE

MODULE PWB

Fig.9

PROJECTION UNIT

REMOCON

SENSOR PWB

HV DIVIDER

Fig.10

3.2.19 REMOCON SENSOR PWB

• Take out the REAR PANEL. (1) Disconnect the connector [ R ]. (2) Remove 1 screw [ X ]. (3) Take out the REMOCON SENSOR PWB.

(No.YA097)1-21

+ 48 hidden pages

JVC AV48WP55 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

1.1 SAFETY PRECAUTIONS

1.2 INSTALLATION [ AV-65WP55 ]

2.1 FEATURES

2.2 DIFFERENCE LIST

2.3 FUNCTIONS

2.4 TECHNICAL INFORMATION

2.5 MAIN PARTS LOCATION

2.6 SCREEN HANDLING CAUTIONS

2.7 PROJECTION UNIT REPLACEMENT

3.1 DISASSEMBLY PROCEDURE [AV-65WP55]

3.2 DISASSEMBLY PROCEDURE [AV-48WP55, AV-56WP55]