JVC AV24WT5EIS, AV24WT5EKS, AV24WT5EPS, AV28WT5EIS, AV28WT5EKS Service Manual

AV28WT5EPS AV24WT5EPS

AV28WT5EIS AV24WT5EIS

AV28WT5EKS AV24WT5EKS

SERVICE MANUAL

COLOUR TELEVISION

AV28WT5EPS AV24WT5EPS
AV28WT5EIS AV24WT5EIS

BASIC CHASSIS

ⅡⅡⅡⅡ

JK

AV28WT5EKS AV24WT5EKS

CONTENTS

!

SPECIFICATIONS

!

SAFETY PRECAUTIONS

!

WARNING

!

FEATURES

!

MAIN DIFFERENCE PARTS LIST

!

SPECIFIC SERVICE INSTRUCTIONS

!

SERVICE ADJUSTM ENTS

!

PARTS LIST

★

OPERATING INSTRUCTIONS

★

STANDARD CIRCUIT DIAGRAM

････････････････････････････････

････････････････････････････････ ････････････････････････････････

････････････････････････････････････････････････････････････････

････････････････････････････････

････････････････････････････････ ････････････････････････････････

････････････････････････････････････････････････････････････････

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････････････････････････････････ ････････････････････････････････

････････････････････････････････････････････････････････････････

････････････････････････････････

････････････････････････････････ ･･･････････････････････････

････････････････････････････････････････････････････････････････

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････････････････････････････････ ････････････････････････

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････････････････････････････････

････････････････････････････････ ････････････････････････････････

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････････････････････････････････ ････

････････････････････････････････････････････････････････････････

･･･････････････････････････

･･････････････････････････････････････････････････････

････････････････････････････････ ････････

････････････････････････････････････････････････････････････････

････････････････････････････････ ･･･････

････････････････････････････････････････････････････････････････

････････････････････････････････

････････････････････････････････ ････････････････････

････････････････････････････････････････････････････････････････

････････････････････････････････

････････････････････････････････ ･･･････････････

････････････････････････････････････････････････････････････････

････････････････････････

････････････････････････････････････････････････

････････････････････････････････ ････

････････････････････････････････････････････････････････････････

････････････････････････････････

････････････････････････････････ ･････････････････････

････････････････････････････････････････････････････････････････

････････････････････････････････

････････････････････････････････ ･･････････････････

････････････････････････････････････････････････････････････････

････････････････････

････････････････････････････････････････

･･･････････････

･･････････････････････････････

･････････････････････

･･････････････････････････････････････････

･･････････････････

････････････････････････････････････

････････

････････････････

･･･････

･･････････････

････

････････

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4
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9
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39

1-1
2-1

1

COPYRIGHT © 2001 VICTOR COMPANY OF JAPAN, LTD.

No.51776
Jan. 2001

A

V28WT5EPS

A

A

V28WT5EIS
V28WT5EKS

SPECIFICATIONS

Item

Dimensions ( W
Mass

TV RF System
Colour System

Stereo System
Teletext System

Receiving Frequency

Intermediate Frequency

××××H××××

D )

VHF
UHF

French CATV

VIF Carrier
SIF Carrier

716mm×489mm×496mm

34.2kg
CCIR (B/G, I ,L) CCIR (I ) CCIR ( I )
PAL / SECAM /

NTSC (Only in EXT mode)
A2 / NICAM NICAM NICAM
FLOF (Fastext)

TOP (German system)
WST(Standard system)

47MHz ～ 470MHz 47MHz ～ 470MHz
470MHz ～ 862MHz 470MHz ～ 862MHz 470MHz ～ 862MHz
116MHz ～ 172MHz /

220MHz ～ 469MHz

38.9MHz (B/G, I ,L)/ 33.95MHz (L’) 38.9MHz ( I ) 38.9MHz ( I )

33.4MHz (5.5MHz:B/G) / 32.9MHz
(6.0MHz:I) / 32.4MHz (6.5MHz:L) /

27.45MHz (6.5MHz:L’)

AV28WT5EPS AV28WT5EIS AV28WT5EKS

(28” Model)

Content

PAL / NTSC (Only in EXT mode) PAL / NTSC (Only in EXT mode)

FLOF (Fastext)
WST(Standard system)

32.9MHz (6.0MHz:I) 32.9MHz (6.0MHz:I)

Colour Sub Carrier Freq.

PAL

SECAM

NTSC

Power Input
Power Consumption

Aerial Input Term
Picture Tube

High Voltage

Speaker
Audio Output

EXT-1/EXT-2/EXT-3
(Input / Output)

EXT-4 (Input) Video

Audio(L/R)

S / Video

AUDIO OUT (Variable)

Headphone jack

4.43MHz 4.43MHz 4.43MHz

4.40625MHz / 4.25MHz

3.58MHz / 4.43MHz 3.58MHz / 4.43MHz 3.58MHz / 4.43MHz
AC 220V～240V , 50Hz

156W(Max) / 122W(Avg),
122W/h(ITALY)
75Ωunbalanced, Coaxial
Visible size : 66cm, Measured

diagonally

1kV

30.0kV (at zero beam
current)

10cm×3cm Oval type×2
5W + 5W

21-pin Euro connector
(SCART socket)

1Vp-p 75Ω(RCA pin jack)
500mVrms(!-4dBs!), High
Impedance (!RCA pin jack!)

Y : 1V
sync Provided, when terminated
with 75Ω)
C : 0.286V
terminated with 75Ω)

0～1Vrms, Low Impedance
(RCA pin jack×2)

Stereo mini jack (φ3.5mm )

+

-1.5kV

p-p

POSITIVE (Negative

p-p

(Burst signal, when

Remote Control Unit

RM-C54 (AAA/R03 dry battery×2) RM-C55 (AA A /R03 dry battery×2)

Design & specifications are subject to change without notice

2

.

No.51776

A

V24WT5EPS

A

A

V24WT5EIS

V24WT5EKS

SPECIFICATIONS

Item

Dimensions ( W
Mass

TV RF System
Colour System

Stereo System
Teletext System

Receiving Frequency

Intermediate Frequency

Colour Sub Carrier Freq.

Power Input
Power Consumption

Aerial Input Term
Picture Tube

High Voltage

Speaker
Audio Output

EXT-1/EXT-2/EXT-3
(Input / Output)

EXT-4 (Input) Video

AUDIO OUT

Headphone jack

××××H××××

D )

VHF
UHF

French CATV

VIF Carrier
SIF Carrier

PAL

SECAM

NTSC

Audio(L/R)

S / Video

645mm×427mm×443mm

23.1kg
CCIR (B/G, I ,L) CCIR ( I )

PAL / SECAM /
NTSC (Only in EXT mode)

A2 / NICAM NICAM
FLOF (Fastext)

TOP (German system)
WST(Standard system)

47MHz ～ 470MHz 47MHz ～ 470MHz
470MHz ～ 862MHz 470MHz ～ 862MHz 470MHz ～ 862MHz
116MHz ～ 172MHz /

220MHz ～ 469MHz

38.9MHz (B/G, I ,L) /

33.95MHz (L’)

33.4MHz (5.5MHz:B/G) / 32.9MHz
(6.0MHz:I) /32.4MHz (6.5MHz:L) /

27.45MHz (6.5MHz:L’)

4.43MHz 4.43MHz

4.40625MHz / 4.25MHz

3.58MHz / 4.43MHz 3. 58MHz / 4.43MHz
AC 220V～240V , 50Hz

127W(Max) / 92W(Avg)
92W/h(ITALY)
75Ωunbalanced, Coaxial
Visible size : 56cm, Measured

diagonally

30.0kV (at zero beam
current)

10cm×3cm Oval type×2
5W + 5W

21-pin Euro connector
(SCART socket)

1Vp-p 75Ω(RCA pin jack)
500mVrms(!-4dBs!), High
Impedance (!RCA pin jack!)

Y : 1V
sync Provided, when terminated
with 75Ω)
C : 0.286V
terminated with 75Ω)

0～1Vrms, Low Impedance
(RCA pin jack)

Stereo mini jack (φ3.5mm )

AV24WT5EPS AV24WT5EIS AV24WT5EKS

1kV

+

-1.5kV

p-p

POSITIVE (Negative

p-p

(Burst signal, when

(24” Model)

Content

PAL /
NTSC (Only in EXT mode)

FLOF (Fastext)
WST(Standard system)

38.9MHz ( I )

32.9MHz (6.0MHz:I)

Remote Control Unit

RM-C54 (AAA/R03 dry battery×2) RM-C55 (AAA/R03 dry battery×2)

Design & specifications are subject to change without notice

No.51776

3

A

V28WT5EPS AV24WT5EPS

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.

components having such features are identified by shading
on the schematics and by (
manual.

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.

The use of a substitute replacement which does not

!!!!

) on the parts list in Service

Electrical

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 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.

5. 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).

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. 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 t he other end of
the lead through a 10k" 2W resistor to the anode button.

8. When service is required, observe t he 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.

(1)

(2)

AV28WT5EPS / AV24WT5EPS

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.

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 applianc e 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.

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 m ust 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 1500" 10W resistor paralleled by a 0.15#F
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 mus t not exceed 0.3V A C (r.m. s.).
This corresponds to 0.2mA AC (r.m.s.).

AC VOLTMETER

0.15μF AC-TYPE

1500

GOOD EARTH GROUND

"

(HAVING 1000
OR MORE SENSITIVITY)

10W

/V,

"

PLACE THIS PROBE
ON EACH EXPOSED
METAL PART

4

No.51776

A

V28WT5EIS AV24WT5EIS

A

V28WT5EKS AV24WT5EKS

SAFETY PRECAUTIONS

1. The design of this product cont ains special hardware and 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. Alt erations of the design or circuit ry of the product 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 product have special
safety-related characteristics. These characteristics are often not
evident from visual inspection nor can the protection afforded by
them necessary be obtained by using replacement components
rated for higher voltage, wattage, etc. Replacement parts which

4. The leads in the products are routed and dressed with ties,

AV28WT5EIS / AV24WT5EIS
AV28WT5EKS / AV24WT5EKS

have these special safety characteristics are identified in the
Parts List of Service Manual. Elect rical components having such
features are identified by shading on the schemati cs and by (!)
on the Parts List in the 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 m ay cause shock, fire, or ot her
hazards.

clamps, tubing’s, barriers and the like to be separated from live
parts, high temperature parts, moving parts and / or sharp edges
for the prevention of electric shock and fire hazard. When
service is required, the original lead routing and dress should be
observed, and it should be confirmed that they have been
returned to normal, after re-assembling.

WARNING

1. The equipm ent has been designed and manuf act u red t o meet internati onal saf ety standards.

2. I t is the legal responsibility of the repairer to ensure that these safety standards are maintained.

3. Repairs must be made in accordance with the relevant safety standards.

4. I t is essential that safety critical components are replaced by approved parts.

5. I f mains voltage selector is provided, check setting for local voltage.

No.51776

5

A

V28WT5EPS AV24WT5EPS

A

A

V28WT5EIS AV24WT5EIS
V28WT5EKS AV24WT5EKS

■■■■

21-pin Euro connector (SCART socket) : EXT-1 / EXT-2 / EXT-3

(P-P= Peak to Peak, S-W= Sync tip to white peak, B-W= Blanking to white peak)

Pin

No.

Signal Designation Matching Value EXT-1 EXT-2 EXT-3

1 AUDIO R output 500mVrms(Nominal),

Low impedance

2 AUDIO R input 500mVrms(Nominal),

High impedance

3 AUDIO L output 500mVrms(Nominal),

Low impedance

4 AUDI O GND
5 GND (B )
6 AUDIO L input 500mVrms(Nominal),

High impedance

7 B i nput
8 FUNCT O N SW

(SLOW SW)

9 GND (G)
10 SCL3 NC
11 G input
12 SDA3 NC
13 GND (R)
14 GND (YS)
15 R / C input

16 Ys input
17 GND(VIDEO output)
18 GND(VIDEO input)
19 VIDEO output

20 VIDEO / Y input
21 COMMON GND

700mV
Low : 0-3V, High : 8-12V, High

impedance

700mV

R : 700mV
C : 300mV
Low : 0 - 0.4, High : 1 - 3V, 75

1V

P-P

1V

P-P

Ω○

, 75

B-W

Ω○

, 75

B-W

Ω

, 75

B-W

Ω

, 75

P-P

Ω○

(Negative going sync), 75

(Negative going sync), 75

Ω○

Ω○ ○ ○

○

(TV OUT)

○○○

○

(TV OUT)

○○○

○○○

○○○

○○○

○○○

○○○

○

○

(only R)

○○○

○○○

(TV)

○○○

○

(LINE OUT)

○

(LINE OUT)

NC NC

○

NC NC

○

NC NC

○

(only C)

NC NC

○

(LINE OUT)

NC

NC

NC

NC

○

(only C)

NC

[

Pin assignment

6

]

No.51776

A

A

A

FEATURES

V28WT5EPS AV24WT5EPS

V28WT5EIS AV24WT5EIS

V28WT5EKS AV24WT5EKS

"

By preference, users can select the picture size from REGULAR,

PANORAMIC, FULL, 14:9 ZOOM, 16:9 ZOOM, 16:9 ZOOM SUB
TITLE modes. When the TV unit received WSS picture signal, the
picture can be changed to 16:9 ZOOM mode automatically.

"

The TELETEXT SYSTEM has a built-in FASTEXT, TOP(Only

AV28WT5EPS / AV24WT5EPS) and WST system.

"

Because this TV unit corresponds to multiplex broadcast, users

can enjoy music programs and sporting events with live realism.
In addition, BILINGUAL programs can be heard in their original
language.

TV EXT-1 EXT-3

EXT-2

"

Built-in ECO (ECONOMY, ECOLOGY) MODE.

In accordance with the brightness in a room, the brightness
and/or contrast of the picture can be adjusted automatically to
make the optimum picture which is easy on the eye.

"

Users can make VCR dubbing of picture and sound by controlling

the AV selector to select an opt ional source at the EXT-2 output
shown in figure.

EXT-4

No.51776

7

A

V28WT5EPS AV24WT5EPS

A

A

V28WT5EIS AV24WT5EIS
V28WT5EKS AV24WT5EKS

MAIN DIFFERENCE PARTS LIST

(28” Model)

Model Name

!!!!

Part Name

MAIN PWB SJK-1712A-U2

AV SEL. PWB SJK0S712A-U2

!

POWER CORD QMPK160-185-JC QMPN130-185-JC

!

RATING LABEL

EURO LABEL AEM1052-031-E AEM1052-030-E AEM1052-029-E

!

INST BOOK
REMOTE CONTROL

UNIT
X-RAY CARD AEM1061-001-E
S. DIAGRAM

ONLY ITALY(SERVICE)
REG. SHEET

AV28WT5EPS AV28WT5EIS AV28WT5EKS

SJK-1912A-U2

SJK0S912A-U2

AEM3148-001-E

LC20433-008A-U
LC20434-008A-U

LCT0897-001A-U
LCT0898-001A-U

RM-C54-1C RM-C55-1C

2824WT5-HSAEI

××

LC20080-015A-U LC20091-023A-U

LCT0900-001A-U LCT0899-001A-U

←

←

××

××

←

←

(24” Model)

Model Name

!!!!

Part Name

MAIN PWB SJK-1713A-U2

AV SEL. PWB SJK0S713A-U2

!

POWER CORD QMPK160-185-JC QMPN130-185-JC

!

RATING LABEL

EURO LABEL AEM1052-027-E AEM1052-025-E AEM1052-026-E

!

INST BOOK
REMOTE CONTROL

UNIT
X-RAY CARD AEM1060-001-E
S. DIAGRAM

ONLY ITALY(SERVICE)
REG. SHEET

AV24WT5EPS AV24WT5EIS AV24WT5EKS

SJK-1913A-U2

SJK0S913A-U2

AEM3148-001-E

LC20433-007A-U
LC20434-007A-U

LCT0897-001A-U
LCT0898-001A-U

RM-C54-1C RM-C55-1C

2824WT5-HSAEI

××

LC20080-014A-U LC20091-022A-U

LCT0900-001A-U LCT0899-001A-U

←

←

××

××

←

←

8

No.51776

A

V28WT5EPS AV24WT5EPS

A

A

V28WT5EIS AV24WT5EIS

V28WT5EKS AV24WT5EKS

SPECIFIC SERVICE INSTRUCTIONS

REPLACEMENT OF CHIP COMPONENT

!

CAUTIONS

1. A void heating for more than 3 seconds.

2. Do not rub the elect rodes 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.

!

SOLDERING IRON

1. Us e a hi gh insulat i on solderi ng iron with a thin pointed end of it.

2. A 30w solderi ng i ron is recommended for easily removi ng parts .

!

REPLACEMENT STEPS

How to remove Chip parts

1.

####

Resistors, capacitors, etc

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

alternately melt the solder at each end.

(2) Shi ft with tweezers and remove the chip part.

####

Transistors, diodes, variable resistors, etc

(1) Appl y extra sol der to each lead.

SOLDER

SOLDER

2. How to install Chip parts

####

Resistors, capacitors, etc

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

(2) Gras p 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) Appl y 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

as indicated in the figure.

A

A

and C.

B

B

B

9

(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.

(4) Then solder leads

Note : After removing the part, remove remaining solder from the

pattern.

No.51776

C

A

C

A

V28WT5EPS

A

A

A

A

V28WT5EIS
V28WT5EKS

DISASSEMBLY PROCEDURE

(28” Model)

REMOVING THE REAR COVER

1. Unplug the power cord.

”

2. Remove the 13 screws marked

3. Withdraw the rear cover toward you.

“

as shown in the Fig. 1.

AAAA

REMOVING THE CHASSIS

"

After removing the rear cover.

”

1. Remove t he s crew mark ed
FRONT CABINET as shown in the Fig. 1.

2. Slightly raise the both sides of t he chassis by hand and remove
the two claws under the both sides of the chassis from the front
cabinet.

3. Withdraw the chassis backward.
(If necessary, take off the wire clamp, connectors etc.)

“

on the S/VIDEO terminal of

BBBB

REMOVING THE AV TERMINAL BOARD

"

After removing the rear cover.

”

1. Remove the 2 screws marked

2. Remove the claws marked
shown in Fig. 2.

3. While raising the claw marked
TERMINAL BOARD slightly in the directi on of arrow

shown in Fig. 2.

“

“

as shown in the Fig. 1.

CCCC

”

under the CHASSIS as

DDDD

”

“

, remove the top of the AV

EEEE

“

FFFF

”

as

V TERMINAL

BOARD

E

F

D

REMOVING THE SPEAKER

"

After removing the rear cover.

”

1. Remove the 2 screws marked

2. Follow the same steps when removing the other hand speaker.

“

as shown in Fig. 1.

GGGG

CHECKING THE PW BOARD

To check the back side of the PW Board.

1) Pull out the chassis. (Refer to REMOVING THE CHASSIS).

2) Erect the chassis vertically so that you can easily check t he
back side of the PW Board.

[CAUTION]

"

When erecting the chassis, be careful so that there will be no

contacting with other PW Board.

"

Before turning on power, mak e sure that the wire connector is

properly connected.

"

When conducting a check with power supplied, be sure to confirm

that the CRT EARTH WIRE (BRAIDED ASS’Y) is connected to
the CRT SOCKET PW board.

WIRE CLAMPING AND CABLE TYING

1. Be sure to clamp the wire.

2. Never remove the cable tie used for tying the wires together.
Should it be inadvertently removed, be s ure to tie the wires with
a new cable tie.

V SEL PWB

D

Fig. 2

10

No.51776

A

V28WT5EPS

A

A

A
A

V28WT5EIS

V28WT5EKS

(28” Model)

FRONT CABINET

B

SPEAKER

CRT
SOCKET
PWB

FRONT CONTROL
PWB

V SEL. PWB

POWER & DEF. PWB

CLAW

CHASSIS

CONTROL BASE

REAR COVER

V TERMINAL

BOARD

MAIN PWB

CLAW

C

B

Fig. 1

No.51776

11

A

V24WT5EPS

A

A

A

A

V24WT5EIS
V24WT5EKS

DISASSEMBLY PROCEDURE

(24” Model)

REMOVING THE REAR COVER

1. Unplug the power cord.

”

2. Remove the 9 screws marked

3. Withdraw the rear cover toward you.

“

as shown in the Fig. 3.

AAAA

REMOVING THE CHASSIS

"

After removing the rear cover.

1. Slightly raise the both sides of t he chassis by hand and remove
the two claws under the both sides of the chassis from the front
cabinet.

2. Withdraw the chassis backward.
(If necessary, take off the wire clamp, connectors etc.)

REMOVING THE AV TERMINAL BOARD

"

After removing the rear cover.

”

1. Remove the 2 screws marked

2. Remove the claws marked
shown in Fig. 4.

3. While raising the claw marked
TERMINAL BOARD slightly in the directi on of arrow

shown in Fig. 4.

“

“

as shown in the Fig. 3.

BBBB

”

under the CHASSIS as

CCCC

“

”

, remove the top of the AV

DDDD

“

EEEE

”

as

REMOVING THE SPEAKER

"

After removing the rear cover.

”

1. Remove the 2 screws marked

2. Follow the same steps when removing the other hand speaker.

“

as shown in Fig. 3.

FFFF

CHECKING THE PW BOARD

"

To check the back side of the PW Board.

1) Pull out the chassis. (Refer to REMOVING THE CHASSIS).

2) Erect the chassis vertically so that you can easily check t he
back side of the PW Board.

[CAUTION]

"

When erecting the chassis, be careful so that there will be no

contacting with other PW Board.

"

Before turning on power, mak e sure that the wire connector is

properly connected.

"

When conducting a check with power supplied, be sure to confirm

that the CRT EARTH WIRE (BRAIDED ASS’Y) is connected to
the CRT SOCKET PW board.

WIRE CLAMPING AND CABLE TYING

1. Be sure to clamp the wire.

2. Never remove the cable tie used for tying the wires together.
Should it be inadvertently removed, be s ure to tie the wires with
a new cable tie.

V TERMINAL

BOARD

E

D

C

V SEL. PWB

C

Fig. 4

12

No.51776