JVC AV27D304 - Service Manual Immediate Download

SERVICE MANUAL

No.52102

2003/03

AV-27D104 AV-27D304

AV-27430 AV-27432

COLOR TELEVISION

52102

2003

AV-27D104/RA, AV-27D104/SA,

AV-27D304/RA, AV-27D304/SA,

AV-27430/RA, AV-27430/SA,

AV-27432/RA, AV-27432/SA

TABLE OF CONTENTS

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

SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12

AV-27D104

AV-27D304

AV-27430

AV-27432

BASIC CHASSIS

FE2

AV-27D104 AV-27D304

AV-27430 AV-27432

1-2 (No.52102)

SPECIFICATION

Design & specifications are subject to change without notice.

Items

Contents

AV-27D104 / AV-27D304

AV-27430 / AV-27432

Dimensions (W x H x D)

75.2cm x 59.0cm x 53.1cm

(29-5/8" x 23-1/4" x 23")

65.4cm x 59.3cm x 49.4cm

(25-3/4" x 23-3/8" x 19-1/2")

Mass

32.2kg (70.8 Ibs)

31.1kg (68.5 Ibs)

TV RF System

CCIR(M)

Color Sound System

NTSC, BTSC System (Multi Channel Sound)

TV Receiving Channels and Frequency

VL Band

VH Band

UHF Band

02ch~06ch : 54MHz~88MHz

07ch~13ch : 174MHz~216MHz

14ch~69ch : 470MHz~806MHz

CATV Receiving Channels and Frequency

Low Band

High Band

Mid Band

Super Band

Hyper Band

Ultra Band

Sub Mid Band

54MHz~804MHz

02~06, A-8 by 02~06&01

07~13 by 07~13

A~1 by 14~22

J~W by 23~36

W+1~W+28 by 37~64

W+29~W+84 by 65~125

A8, A4~A1 by 01, 96~99

TV/CATV Total Channel

180 Channels

Intermediate Frequency

Video IF Carrier

Sound IF Carrier

45.75MHz

41.25MHz (4.5MHz)

Color Sub Carrier

3.58MHz

Power Input

120V AC, 60Hz

Power Consumption

105W

Picture Tube

27" (68cm) Measured diagonally

H: 55.4cm x V: 41.8cm

High Voltage

28kV±1.3kV (at zero beam current)

Speaker

5 x 9cm (2" x 3-1/2") Oval type x 2

Audio Power Output

1.2W + 1.2W

Video / Audio Input (1 / 2 / 3)

Video (1 / 3)

Audio (1 / 2 / 3)

S-Video (Input 1)

Component (Input 2)

1V(p-p), 75ohm (RCA pin jack x 2)

500mV(rms) (-4dBs), high impedance (RCA pin jack x 8)

Mini DIN 4pin x 1

Y : 1V(p-p) positive (negative sync provided, when terminated with 75ohm)

C : 0.286V(p-p) (burst signal when terminated with 75ohm)

RCA pin jack x 3

Y : 1V(p-p) positive (negative sync provided, when terminated with 75ohm)

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

Audio Output (Variable)

More then 0~1550mVrms (+4dBs)

Low impedance (400Hz when modulated 100%) (RCA pin jack)

Antenna terminal (VHF/UHF)

F-type connector, 75ohm

Remote Control Unit

RM-C1253G [AV-27D304]

RM-C1255G [AV-27D104]

(AA battery x 2 or Lithium cell battery x 1)

RM-C203

(AA battery x 2 or Lithium cell battery x 1)

AV-27D104 AV-27D304

AV-27430 AV-27432

(No.52102)1-3

SECTION 1

PRECAUTIONS

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 that 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

(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 with a measuring

apparatus

(oscilloscope

etc.)

the

LIVE

side

GND

and

ISOLATED(NEUTRAL) side GND or EARTH side GND at the same

time.

If above note will not be kept, a fuse or any parts will be broken.

(6) 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.

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

the B1 setting should be checked or adjusted (See ADJUSTMENT

OF B1 POWER SUPPLY).

(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

2W resistor to the anode button.

(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.

(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, screwheads, 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

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 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 ohms per volt or more sensitivity in

the following manner. Connect a 1500ohm 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.).

(11) High voltage hold down circuit check.

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".

AC VOLTMETER

(HAVING 1000 /V,

OR MORE SENSITIVITY)

PLACE THIS PROBE

ON EACH EXPOSED

METAL PART

1500

10W

0.15 F AC-TYPE

GOOD EARTH GROUND

PWB

White line side

WHT

POWER CORD

REPLACEMENT WARNING.

Connecting the white line side of power

cord to "WHT" character side.

This mark shows a fast

operating fuse, the

letters indicated below

show the rating.

AV-27D104 AV-27D304

AV-27430 AV-27432

1-4 (No.52102)

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

2.1 FEATURES

2.2 MAIN DIFFERENCE LIST

· The difference between AV-27D104/AV-27D304 series models and AV-27430/AV-27432 series models are mainly in the CABINET.

· The difference between RA models and SA models is in the PICTURE TUBE. As the result of the difference in PICTURE TUBE, the

MAIN PWB also differ.

· The difference between AV-27D104 series models and AV-27D304 series models are in the CABINET color.

· The difference between AV-27430 series models and AV-27432 series models are in the CABINET color.

2.3 HOW TO IDENTIFY MODELS

How to recognize from the appearance of the model concerned

is written right figure. Please distinguish from several contents on

the printing label.

Function

AV-27D104 AV-27D304 AV-27430

AV-27432

Description

Tele-Text

(Closed-Caption)

used

Title TELE-TEXT broadcast of C1~C4 and T1~T4 formula is receivable.

Digital Comb Filter

used

By the three-line digital comb filter, the refreshed image can be seen.

Video Status

(THEATER)

used

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

function (STANDARD-DYNAMIC-THEATER-GAME).

Video Status

(SPORTS)

used

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

function (STANDARD-DYNAMIC-SPORTS-GAME).

GAME button

used

Sets automatically the proper conditions for playing video game (previously

connected in the front input).

Component input

used

Since the component signal input terminal is equipped, it reappears direct

without deteriorating the signal from DVD.

BBE

-used

BBE high definition audio adds natural, clear and extraordinary sound

quality to any program.

V-CHIP

used

Since the V chip is built in, it can choose, view and listen to a healthy

program.

Hyper-Surround

used

Creates a deep, three-dimensional sound effect by channeling the audio

through the TV's front-firing speakers.

MTS Stereo

used

The voice multiplex function of the MTS system is built in.

(MTS = Multi channel TV Sound system)

Return Plus

used

You program a specific channel to return to while scanning through the

channels using the CH+ and CH buttons.

Part name

AV-27D104 /RA

AV-27D104 /SA

AV-27D304 /RA

AV-27D304 /SA

MAIN PWB

SFE-1026A-M2

SFE-1025A-M2

SFE-1022A-M2

SFE-1021A-M2

PICTURE TUBE (ITC)

A68ADT25X01

A68QDN891X001

A68ADT25X01

A68QDN891X001

FRONT CABINET

GQ10018-003A-A

GQ10018-001B-A

REAR COVER

GQ10017-001B-A

REMOTE CONTROL UNIT RM-C1255G-1H

RM-C1255G-1H

RM-C1253G-1H

Part name

AV-27430 /RA

AV-27430 /SA

AV-27432 /RA

AV-27432 /SA

MAIN PWB

SFE-1028A-M2

SFE-1027A-M2

SFE-1030A-M2

SFE-1029A-M2

PICTURE TUBE (ITC)

A68ADT25X01

A68QDN891X001

A68ADT25X01

A68QDN891X001

FRONT CABINET

LC10081-004B-A

LC10081-008A-A

REAR COVER

LC10082-005A-A

LC10082-003A-A

REMOTE CONTROL UNIT RM-C203-1C

RM-C203-1C

RM-C1255G-1H

Indicated model name

Indicated RA or SA models

AV-27D104 AV-27D304

AV-27430 AV-27432

(No.52102)1-5

2.4 FUNCTIONS

[REAR PANEL]

[REMOTE CONTROL UNIT]

[FRONT PANEL]

POWER

CHANNEL VOLUME

CHANNEL

VOLUME

AV-27D104 (RM-C1255G)

AV-27D304 (RM-C1253G)

AV-27430 / AV-27432 (RM-C203)

<AV-27D104 / AV-27D304>

<AV-27430 / AV-27432>