JVC AV-2568TEE, AV-25LH3, AV-25LS3, AV-25LS3/AU, AV-25LX3 Service Manual

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AV-25LS3 AV-25LX3

AV-25LH3 AV-2568TEE

SERVICE MANUAL

COLOUR TELEVISION

AV-25LS3 AV-25LS3 /AU AV-25LH3

AV-25LX3 AV-25LX3 /A AV-25LX3 /AU AV-2568TEE

BASIC CHASSIS

CH

MUTING

POWER

MUTING

POWER

MUTING

POWER

MUTING

POWER

SYSTEM

CINEMA

SYSTEM

CINEMA

SYSTEM

CINEMA

SYSTEM

CINEMA

COLOUR SOUND SURROUND

COLOUR SOUND SURROUND

COLOUR SOUND SURROUND

COLOUR SOUND SURROUND

 

ECO

 

ECO

 

ECO

 

ECO

DISPLAY

SENSOR

DISPLAY

SENSOR

DISPLAY

SENSOR

DISPLAY

SENSOR

 

MENU

 

 

MENU

 

 

 

MENU

 

 

 

MENU

 

I/II

 

 

TV/TEXT

I/II

 

 

 

 

 

 

 

 

 

 

TV/TEXT

TV/VIDEO

1

2

3

TV/VIDEO

1

2

3

TV/VIDEO

1

2

3

TV/VIDEO

1

2

3

OFF

OFF

OFF

OFF

TIMER

4

5

6

TIMER

4

5

6

TIMER

4

5

6

TIMER

4

5

6

PICTURE

PICTURE

PICTURE

PICTURE

 

 

 

 

 

 

 

 

 

 

 

 

MODE

7

8

9

MODE

7

8

9

MODE

7

8

9

MODE

7

8

9

CHANNEL

CHANNEL

CHANNEL

CHANNEL

SCAN

RETURN+

0

-/--

SCAN

RETURN+

0

-/--

SCAN

RETURN+

0

-/--

SCAN

RETURN+

0

-/--

 

 

 

 

 

 

 

 

CHANNEL

VOLUME

CHANNEL

VOLUME

CHANNEL

VOLUME

CHANNEL

VOLUME

 

TEXT

 

 

 

 

 

 

 

 

 

 

TEXT

 

REVEAL

HOLD

INDEX

SIZE

 

 

 

 

 

 

 

 

REVEAL

HOLD

INDEX

SIZE

SUBPAGE STORE

MODE

CANCEL

 

 

 

 

 

 

 

 

SUBPAGE STORE

MODE

CANCEL

 

 

 

 

 

RM-C1011

 

 

RM-C1014

 

 

 

 

 

 

RM-C1010

TV

 

TV

 

 

 

TV

 

 

 

RM-C1013

TV

RM-C1010-1H

RM-C1011-1H

RM-C1014-1H

RM-C1013-1H

[AV-25LS3]

[AV-25LH3]

[AV-25LX3]

[AV-2568TEE]

[AV-25LS3/AU]

 

[AV-25LX3/A]

 

 

 

[AV-25LX3/AU]

 

CONTENTS

a SPECIFICATIONS ....................................................................................................................................

2

a OPERATING INSTRUCTIONS (APPENDIX)

 

a SAFETY PRECAUTIONS .........................................................................................................................

3

a FEATURES ..............................................................................................................................................

4

a FUNCTIONS .............................................................................................................................................

5

a SPECIFIC SERVICE INSTRUCTIONS ....................................................................................................

6

a SERVICE ADJUSTMENTS ....................................................................................................................

14

a STANDARD CIRCUIT DIAGRAM (APPENDIX) ..................................................................................

2-1

a PARTS LIST ...........................................................................................................................................

39

No. 52033

COPYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTD.

Aug. 2002

AV-25LS3 AV-25LX3

AV-25LH3 AV-2568TEE

SPECIFICATIONS

Items

 

 

 

 

 

 

Contents

 

 

AV-25LS3

AV-25LS3/AU

AV-25LH3

AV-25LX3

AV-25LX3/A

AV-25LX3/AU

AV-2568TEE

 

 

 

 

 

 

 

 

 

 

 

 

 

Dimensions (W × H × D)

 

68.2cm x 53.84cm x 47.75cm

 

 

 

 

 

Mass

 

32kg

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TV RF System

 

B, G, I, D, K, K1, M

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Colour System

TV Mode

PAL / SECAM / NTSC3.58 / NTSC4.43

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VIDEO Mode

PAL / SECAM / NTSC3.58 / NTSC4.43

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Stereo System

 

A2/NICAM (B / G, I, D / K) System

 

Playback Only

 

 

 

 

 

 

 

 

 

 

 

 

 

Teletext system

 

 

 

 

 

 

 

 

 

 

 

FLOF(Fastext),

 

 

Q

 

 

 

Q

WST(World Standard Text)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Receiving Frequency

VHF (VL)

46.25MHz – 140.25MHz

(AS0 – S6)

 

 

 

 

 

 

 

 

 

 

 

 

VHF (VH)

147.25MHz – 423.25MHz

(S7 – S36)

 

 

 

 

 

 

 

 

 

 

 

 

UHF

431.25MHz – 863.25MHz

(S37 – CHINA 57)

 

 

 

 

 

 

 

 

 

 

 

 

 

CATV

● Cable TVs of Mid (X-Z, S1-S10)

 

 

 

 

 

 

 

Super (S11-S20) & Hyper (S21-S41) bands receivable

 

 

 

 

 

 

 

 

 

 

 

 

 

Intermediate

VIF Carrier

38.0MHz

 

 

 

 

 

 

 

 

Frequency

 

 

 

 

 

 

 

 

 

 

 

31.5MHz (6.5MHz)

 

 

 

 

 

 

 

 

SIF Carrier

32.0MHz (6.0MHz)

 

 

 

 

 

 

 

 

 

32.5MHz (5.5MHz)

 

 

 

 

 

 

 

 

 

33.5MHz (4.5MHz)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Colour Sub Carrier Frequency

PAL (4.43MHz), SECAM (4.40625MHz / 4.25MHz)

 

 

 

NTSC (3.58MHz / 4.43MHz)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Aerial Input Terminal

 

75Ø Unbalanced

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Power Input

 

AC110 – 240V, 50 / 60Hz

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Power Consumption

 

162W (Max.) / 102W (Avg.)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Picture Tube

 

Visible size : 60cm measured diagonally

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

High Voltage

 

31kV ± 1.5kV (at cut-off in service mode)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Speaker

 

5 × 12cm

Oval type ×2

 

 

 

 

 

 

 

Audio Output

 

7W + 7W

 

 

 

 

 

 

 

 

Video / Audio Input (1 / 2 / 3)

Video(1,3)

: 1Vp-p, 75Ø (RCA pin jack)

 

 

 

 

 

 

 

Audio(1,2,3)

: 500mVrms ( -4dBs ), High Impedance (RCA pin jack)

 

 

 

S-Video ( Input 1 Over ) [Only for AV-25LS3/AU, AV-25LH3, AV-25LX3/AU]

 

 

 

Y

: 1Vp-p Positive (negative sync provided, when terminated with 75Ø)

 

 

 

C

: 0.286Vp-p (burst signal, when terminated with 75Ø)

 

 

 

Component Input ( Input 2 )

 

 

 

 

 

 

 

 

 

Y

: 1Vp-p positive (negative sync provided, when terminated with 75Ø)

 

 

 

CB/CR

: 0.7Vp-p 75Ø

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Video/Audio Output

 

1Vp-p, 75Ø (RCA pin jack)

 

 

 

 

 

 

 

 

 

500mVrms(-4dBs)

 

 

 

 

 

 

 

 

 

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

 

 

 

 

 

 

 

 

 

 

 

 

Remote Control Unit

 

RM-C1010-1H

RM-C1011-1H

 

 

RM-C1014-1H

 

RM-C1013-1H

 

 

 

 

 

 

 

 

 

 

 

 

 

(Battery size: AA/R06/UM-3 × 2)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Design & specifications are subject to change without notice.

2

No. 52033

AV-25LS3 AV-25LX3

AV-25LH3 AV-2568TEE

SAFETY PRECAUTIONS

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

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

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

Service manual. Electrical components having such features are identified by shading on the schematics and by (!) on the parts list in Service manual. The use of a substitute replacement which does not have the same safety characteristics as the recommended replacement part shown in the parts list of Service manual may cause shock, fire, or other hazards.

4.Don't short between the LIVE side ground and ISOLATED (NEUTRAL) side ground or EARTH side ground when repairing.

Some model's power circuit is partly different in the GND. The difference of the GND is shown by the LIVE : ( ) side GND, the ISO-

LATED (NEUTRAL) : ( ) side GND and EARTH : ( ) side GND. Don't short between the LIVE side GND and ISOLATED (NEUTRAL)

side GND or EARTH side GND and never measure the LIVE side

GND and ISOLATED (NEUTRAL) side GND or EARTH side GND at the same time with a measuring apparatus (oscilloscope etc.). If above note will not be kept, a fuse or any parts will be broken.

5.If any repair has been made to the chassis, it is recommended that the 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 the other end of the lead through a 10kØ 2W resistor to the anode button.

8.When service is required, observe the original lead dress. Extra precaution should be given to assure correct lead dress in the high voltage circuit area. Where a short circuit has occurred, those components that indicate evidence of overheating should be replaced. Always use the manufacturer's replacement components.

9.Isolation Check

(Safety for Electrical Shock Hazard)

After re-assembling the product, always perform an isolation check on the exposed metal parts of the cabinet (antenna terminals, video/

audio input and output terminals, Control knobs, metal cabinet, screw heads, earphone jack, control shafts, etc.) to be sure the product is safe to operate without danger of electrical shock.

(1)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.

(2)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 1500Ø 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

ON EACH EXPOSED

METAL PART

 

GOOD EARTH GROUND

No. 52033

3

AV-25LS3 AV-25LX3

AV-25LH3 AV-2568TEE

FEATURES

sNew chassis design enables use of an interactive on-screen control.

sPure flat CRT produces fine textured picture in every detail.

sWide range voltage (110V ~ 240V) for AC power input.

sWith AUDIO/VIDEO/COMPONENT input terminals.

sI 2 C bus control utilizes single chip ICs.

sBy means of AUTO PROGRAM, the TV stations can be selected automatically and the TV channels can also be rearranged automatically.

sBuilt-in DIGITAL ECO MODE (ECONOMY, ECOLOGY).

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.

sBuilt-in OFF TIMER & RETURN +.

MAIN DIFFERENCE LIST

[AV-25LS3, AV-25LS3/AU, AV-25LH3]

!

MODEL No.

AV-25LS3

AV-25LS3/AU

AV-25LH3

Part Name

 

 

 

 

 

 

 

 

!

MAIN PWB ASS’Y

SCH-1080A-H2

SCH-1086A-H2

SCH-1096A-H2

 

 

 

 

 

 

 

 

 

!

REAR COVER

GG10134-001B-H

GG10134-003A-H

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FRONT CABINET

GG10133-017B-H

 

 

 

GG10133-021B-H

 

 

 

 

 

 

 

 

 

 

 

 

REMOTE CONTROL UNIT

RM-C1010-1H

 

 

 

RM-C1011-1H

 

 

 

 

 

 

 

 

 

 

 

 

 

[AV-25LX3, AV-25LX3/A, AV-25LX3/AU, AV-2568TEE]

!

MODEL No.

AV-25LX3

AV-25LX3/A

AV-25LX3/AU

AV-2568TEE

Part Name

 

 

 

 

 

 

 

 

 

!

MAIN PWB ASS’Y

SCH-1087A-H2

 

 

 

SCH-1098A-H2

SCH-1097A-H2

 

 

 

 

 

 

 

 

 

 

 

 

 

!

REAR COVER

GG10134-001B-H

 

 

 

GG10134-003A-H

GG10134-001B-H

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FRONT CABINET

GG10133-018B-H

 

 

 

 

 

 

GG10133-019B-H

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

REMOTE CONTROL UNIT

RM-C1014-1H

 

 

 

 

 

 

RM-C1013-1H

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4

No. 52033

JVC AV-2568TEE, AV-25LH3, AV-25LS3, AV-25LS3/AU, AV-25LX3 Service Manual

AV-25LS3 AV-25LX3

AV-25LH3 AV-2568TEE

FUNCTIONS

a FRONT PANEL

a REAR PANEL

 

 

 

 

 

 

 

 

 

[AV-25LS3/AU, AV-25LH3, AV-25LX3/AU]

[AV-25LS3, AV-25LX3, AV-25LX3/A, AV-2568TEE]

VIDEO-1

COMPONENT

 

VIDEO-1

COMPONENT

 

 

(VIDEO-2)

OUTPUT

 

(VIDEO-2)

OUTPUT

INPUT

 

INPUT

 

 

INPUT

 

 

INPUT

 

 

 

 

 

 

 

 

S

 

 

 

 

 

 

 

 

 

OVER

 

 

 

 

 

 

 

 

V

 

Y/V

 

 

V

V

Y/V

 

V

L/

MONO

CB

L/

MONO

L

L/MONO

CB

L/ MONO L

R

 

CR

R

 

R

R

CR

R

R

 

 

 

 

 

 

a REMOTE CONTROL UNIT

 

 

 

 

 

 

 

 

 

 

RM-C1010-1H

RM-C1011-1H

RM-C1014-1H

RM-C1013-1H

[AV-25LS3, AV-25LS3/AU]

[AV-25LH3]

[AV-25LX3, AV-25LX3/A, AV-25LX3/AU]

[AV-2568TEE]

MUTING

 

POWER

MUTING

 

POWER

MUTING

 

POWER

MUTING

 

 

POWER

SYSTEM

CINEMA

 

SYSTEM

CINEMA

 

SYSTEM

CINEMA

 

SYSTEM

CINEMA

 

COLOUR SOUND SURROUND

COLOUR SOUND SURROUND

COLOUR SOUND SURROUND

COLOUR SOUND SURROUND

 

 

ECO

 

 

ECO

 

 

ECO

 

 

 

ECO

DISPLAY

 

SENSOR

DISPLAY

 

SENSOR

DISPLAY

 

SENSOR

DISPLAY

 

 

SENSOR

MENU

 

 

MENU

 

 

MENU

 

 

MENU

 

I/II

 

TV/TEXT

I/II

 

 

 

 

 

 

 

 

TV/TEXT

TV/VIDEO

 

 

TV/VIDEO

 

 

TV/VIDEO

 

 

TV/VIDEO

 

 

 

1

2

3

1

2

3

1

2

3

 

1

2

3

OFF

 

 

OFF

 

 

OFF

 

 

OFF

 

 

 

TIMER

5

6

TIMER

5

6

TIMER

5

6

TIMER

4

5

6

4

4

4

 

PICTURE

 

 

PICTURE

 

 

PICTURE

 

 

PICTURE

 

 

 

MODE

8

9

MODE

8

9

MODE

8

9

MODE

7

8

9

7

7

7

 

CHANNEL RETURN+

 

 

CHANNEL RETURN+

 

CHANNEL RETURN+

 

CHANNEL

RETURN+

 

 

SCAN

0

-/--

SCAN

0

-/--

SCAN

0

-/--

SCAN

 

0

-/--

 

 

 

 

 

CHANNEL

VOLUME

CHANNEL

VOLUME

CHANNEL

VOLUME

CHANNEL

VOLUME

TEXT

 

 

 

 

 

 

 

 

TEXT

 

REVEAL HOLD

INDEX

SIZE

 

 

 

 

 

 

REVEAL

HOLD

INDEX

SIZE

SUBPAGE STORE

MODE

CANCEL

 

 

 

 

 

 

SUBPAGE STORE

MODE

CANCEL

 

 

 

RM-C1011

 

RM-C1014

 

 

 

 

 

RM-C1010

TV

 

TV

 

 

TV

 

 

RM-C1013

TV

No. 52033

5

AV-25LS3 AV-25LX3

AV-25LH3 AV-2568TEE

SPECIFIC SERVICE INSTRUCTIONS

DISASSEMBLY PROCEDURE

REMOVING THE REAR COVER

1.Unplug the power supply cord.

2.Remove the 9 screws marked Åand 4 screws maked ıas shown in Fig.1.

3.Withdraw the Rear cover toward you.

[CAUTION]

When reinstalling the rear cover, carefully push it inward after inserting the Main PWB into the rear cover groove.

REMOVING THE MAIN PW BOARD

After removing the rear cover.

1.Slightly raise the both sides of the Main PWB by hand.

2.Withdraw the Main PWB backward.

(If necessary, take off the wire clamp and connectors, etc.)

REMOVING THE SPEAKER

After removing the rear cover.

1.Remove the 2 screws marked Çand 2 screws marked Îas shown in Fig.1.

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

CHECKING THE MAIN PW BOARD

1.To check the back side of the Main PWB.

1)Pull out the Main PWB. (Refer to REMOVING THE MAIN PW

BOARD).

2)Erect the Main PWB vertically so that you can easily check its back side.

[CAUTION]

Before turning on power, make sure that the CRT earth wire and other connectors are properly connected.

When repairing, connect the Deg. coil to the DEG. connector on the Main PWB.

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 sure to tie the wires with a new cable tie.

6

No. 52033

AV-25LS3 AV-25LX3

AV-25LH3 AV-2568TEE

PICTURE TUBE

FRONT CABINET

D (×2)

C

SPEAKER

(×2)

MAIN PWB

(CRT SOCKET PWB)

MAIN PWB

D (×2)

C

(×2)

SPEAKER

REAR COVER

A (X9)

B (X4)

Fig.1

No. 52033

7

AV-25LS3 AV-25LX3

AV-25LH3 AV-2568TEE

REMOVING THE CRT

* Replacement of the CRT should be performed by 2 or more persons.

After removing the rear cover, chassis etc.,

1.Putting the CRT change table on soft cloth, the CRT change table should also be covered with such soft cloth (shown in Fig. 2).

2.While keeping the surface of CRT down, mount the TV set on the

CRT change table balanced will as shown in Fig. 3.

3.Remove 4 screws marked by arrows with a box type screwdriver as

shown in Fig. 3.

Since the cabinet will drop when screws have been removed, be sure to support the cabinet with hands.

4.After 4 screws have been removed, put the cabinet slowly on cloth (At this time, be carefully so as not to damage the front surface of the cabinet) shown in Fig. 4.

The CRT should be assembled according to the opposite sequence of its dismounting steps.

*The CRT change table should preferably be smaller that the CRT surface, and its height be about 35cm.

COATING OF SILICON GREASE FOR ELECTRICAL INSULATION ON THE CRT ANODE CAP SECTION.

Subsequent to replacement of the CRT and HV transformer or repair of the anode cap, etc. by dismounting them, be sure to coat silicon

grease for electrical insulation as shown in Fig. 5.

1.Wipe around the anode button with clean and dry cloth. (Fig. 5)

2.Coat silicon grease on the section around the anode button. At this time, take care so that any silicon greases does not sticks to the anode button. (Fig. 6)

Silicon grease product No. KS - 650N

CRT

Anode button

Silicon grease coating

Fig. 5

CRT CHANGE TABLE

APPROX.

35cm

CLOTH

Fig. 2

CRT

CRT CHANGE TABLE

BOX

TYPE SCREW DRIVER

Fig. 3

CRT

CABINET

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CRT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CHANGE TABLE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Fig. 4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Approx.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Silicon grease

20mm (Do not

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

should be coated

coat grease on

 

 

 

 

 

 

 

 

 

 

 

 

 

 

by 5mm or more

 

 

 

 

 

 

 

 

 

 

 

 

 

 

this section

 

 

 

 

 

 

 

 

 

 

 

 

 

 

from the outside

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

diameter of anode

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

cap.

Anode button

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Coating position

 

(No sticking of

 

 

 

 

 

 

 

 

 

 

 

 

 

 

of silicon grease

 

silicon grease)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Anode cap

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Fig. 6

8

No. 52033

REPLACEMENT OF MEMORY IC

1.MEMORY IC

This TV uses the following memory IC.

Memory IC: IC1702 on MAIN PW Board

The memory IC memorizes data for correctly operating the video and deflection circuits. When replacing the memory IC, be sure to use the same type IC written with the initial values of data. In other words, use the specific IC listed in “PRINTED WIRING BOARD

PARTS LIST”. For its mounting location, refer to “ADJUSTMENT

LOCATIONS”.

2.PROCEDURE FOR REPLACING MEMORY IC

(1)Power off

Switch the power off and unplug the power cord from the wall outlet.

(2)Replacing the memory IC

Replace the memory IC with new one. Be sure to use the memory IC written with the initial data values.

(3)Power on

Plug the power cord into the wall outlet and switch the power on.

(4)Check and setting of SYSTEM CONSTANT SET:

1)Press the DISPLAY key and the PICTURE MODE key on the remote control unit simultaneously.

The SERVICE MENU screen will be displayed.(See Fig.1.)

2)In the SERVICE MENU, press the DISPLAY key and PICTURE MODE key simultaneously. Then, the SYSTEM CON-

STANT SET screen will be displayed.(See Fig.2.)

3)Check whether the setting values of the SYSTEM CONSTANT SET are the same as those indicated in Table1.

If the value is different, select the setting item with the MENU

&/^ key, and set the correct value with the MENU */Tkey.

4)Press the DISPLAY key twice to return to the normal screen.

(5)Receive channel setting

Refer to the OPERATING INSTRUCTIONS and set the receive channels (channels preset).

(6)User setting

Check the user setting values in Table 2, and if setting value is different, set the correct value.

For setting, refer to the OPERATING INSTRUCTIONS.

(7)Setting of SERVICE MENU

Verify the setting for each setting item in the SERVICE

MENU.(See Table 3.) If readjustment is necessary, perform adjustment referring to “SERVICE ADJUSTMENTS”.

NAME OF REMOTE CONTROL KEYS

MUTING

POWER

SYSTEM

CINEMA

COLOUR SOUND SURROUND

 

ECO

DISPLAY

SENSOR

DISPLAY

MENU

MENU MENU MENU +

 

I/II

 

TV/TEXT

 

 

 

MENU

 

TV/VIDEO

 

 

 

1

2

3

 

OFF

 

 

 

TIMER

5

6

 

4

 

PICTURE

 

 

PICTURE

MODE

8

9

7

MODE

SCAN

 

 

 

CHANNEL RETURN+

 

 

 

 

0

-/--

 

CHANNEL

VOLUME

TEXT

 

 

 

 

AV-25LS3

 

AV-25LX3

 

 

 

 

AV-25LH3 AV-2568TEE

 

 

 

 

 

 

SERVICE MENU

 

 

 

 

 

 

 

 

 

 

 

SERVICE MENU

 

 

 

 

1. IF

 

2. VC

 

 

 

 

3. DEF

 

4. VSM PRESET

 

 

 

 

5. PRESET

6. A2NICAM

 

 

 

 

7. PLUG & PLAY (ON)

 

 

 

 

 

1-7 : SELECT DISPLAY : EXIT

 

 

 

 

******* **** ***** *****

 

 

 

 

 

**** **** *** ***

 

 

 

 

[AV-25LS3, AV-25LS3/AU, AV-25LH3]

 

 

 

 

 

 

 

 

 

 

 

SERVICE MENU

 

 

 

 

1. IF

 

2. VC

 

 

 

 

3. DEF

 

4. VSM PRESET

 

 

 

 

5. PRESET

 

 

 

 

 

 

6. PLUG & PLAY (ON)

 

 

 

 

 

1-6 : SELECT DISPLAY : EXIT

 

 

 

 

******* **** ***** *****

 

 

 

 

 

**** **** *** ***

 

 

 

[AV-25LX3, AV-25LX3/A, AV-25LX3/AU,AV-2568TEE]

 

 

 

 

 

 

 

 

 

 

Fig. 1

 

 

 

 

 

 

 

 

 

 

SYSTEM CONSTANT-Ι

 

 

 

 

SYSTEM CONSTANT SET 1

 

 

 

 

SYSTEM

 

MULTI

 

 

 

 

COMB

 

 

YES

 

 

 

 

TILT

 

 

YES

 

 

 

 

TEXT

 

 

ERCMI

 

 

 

 

SUPER BASS

 

YES

 

 

 

 

LANGUAGE

 

E/R/C/M/I

 

 

 

 

>? : SEL - + : OPE DISP : EXIT

 

 

 

 

 

 

 

 

 

SYSTEM CONSTANT-II

 

 

 

 

SYSTEM CONSTANT SET 2

 

 

 

 

MSP

 

 

YES

 

 

 

 

BILINGUAL

 

YES

 

 

 

 

B / B SOUND

 

NO

 

 

 

 

TUNER

 

 

MU

 

 

 

 

COLOUR AUTO

 

YES

 

 

 

 

>? : SEL - + : OPE DISP : EXIT

 

 

 

 

 

 

 

 

 

SYSTEM CONSTANT-III

 

 

 

 

SYSTEM CONSTANT SET 3

 

 

 

 

LOCK

1 MHz

: 040

 

 

 

 

 

500 KHz

: 040

 

 

 

 

 

250 KHz

: 040

 

 

 

 

 

156. 25 KHz

: 030

 

 

 

 

 

31.25 KHz

: 030

 

 

 

 

>? : SEL - + : OPE DISP : EXIT

 

 

 

 

 

 

 

 

 

SYSTEM CONSTANT-IV

 

 

 

 

SYSTEM CONSTANT SET 4

 

 

 

 

3D SURROUND

 

YES

 

 

 

 

3CH VOL/TONE

 

YES

 

 

 

 

AMP TUNER

 

NO

 

 

 

 

>? : SEL

- + : OPE

DISP : EXIT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Fig. 2

No. 52033

9

AV-25LS3 AV-25LX3

AV-25LH3 AV-2568TEE

SETTING OF SYSTEM CONSTANT SET

Setting value

Setting item

 

Setting content

AV-25LS3

AV-25LS3/AU AV-25LH3 AV-25LX3

AV-25LX3/A AV-25LX3/AU

AV-2568TEE

 

 

 

 

 

SYSTEM

MULTI

TRIPLE

PAL SINGLE VIET

MULTI

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

COMB

 

YES

NO

 

NO

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TILT

 

YES

NO

 

NO

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TEXT

 

ERCMI

ERAPU

NO

ERCMI

 

NO

 

 

 

ERAPU

 

 

 

 

 

 

 

 

SUPER BASS

 

YES

NO

 

NO

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

E/R/C/M/I

E/R/C

E/C

E/R/C/M/I

 

E/C

E/R/C/M/I

LANGUAGE

 

 

 

 

 

 

 

 

 

 

 

 

 

E/R/A/P/U

E/R/A/P

E/R/U

E/R/A/P

 

E/R/A/P/U

MSP

 

YES

NO

 

YES

 

 

NO

 

 

 

 

 

 

 

 

 

 

 

 

BILINGUAL

 

YES

NO

 

NO

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

B/B SOUND

 

YES

NO

 

NO

 

 

 

YES

NO

 

 

 

 

 

 

 

 

 

TUNER

 

MU

MA

 

MU

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

COLOUR AUTO

 

YES

NO

 

NO

 

 

 

YES

NO

 

 

 

 

 

 

 

 

 

LOCK 1MHz

 

000

240

 

040

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

500KHz

 

000

240

 

040

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

250KHz

 

000

240

 

040

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

156.25KHz

 

000

240

 

030

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

31.25KHz

 

000

240

 

030

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3D SURROUND

 

YES

NO

 

YES

 

 

 

 

 

 

3CH VOL/TONE

 

YES

NO

 

NO

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

AMP TUNER

 

YES

NO

 

NO

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Table 1

10

No. 52033

AV-25LS3 AV-25LX3

AV-25LH3 AV-2568TEE

USER SETTING VALUES

Setting item

Setting value

 

 

SUB POWER

ON

 

 

CHANNEL POSITION

1 POSITION

 

 

CHANNEL PRESET

REFER TO OPERATING INSTRUCTIONS

 

 

VOLUME

15 ± 2

 

 

TV/VIDEO

TV

 

 

VNR

OFF

 

 

COMPRESS (16:9)

OFF

 

 

AUTO SHUTOFF

OFF

 

 

CHILD LOCK

OFF

 

 

BLUE BACK

ON

 

 

VIDEO-2 SET

VIDEO

 

 

LANGUAGE

ENG

 

 

3D SURROUND

OFF

 

 

AI VOLUME

ON

 

 

ON SCREEN DISPLAY

POSITION INDICATION

 

 

COLOUR SYSTEM

PAL

 

 

SOUND SYSTEM

B/G

 

 

STEREO MODE

STEREO [AV-25LS3, AV-25LS3/AU, AV-25LH3 only]

 

 

PICTURE MODE-VSM

BRIGHT

 

 

OFF TIMER

00

 

 

ECO SENSOR

OFF

 

 

BASS

CENTRE

 

 

TREBLE

CENTRE

 

 

BALANCE

CENTRE

 

 

Table 2

No. 52033

11

AV-25LS3 AV-25LX3

AV-25LH3 AV-2568TEE

SERVICE MENU SETTING ITEMS

Service menu

Setting item

 

Service menu

Setting item

 

 

 

 

 

1. IF

1. VCO

 

 

 

 

 

2. DELAY POINT

 

 

 

 

 

 

 

 

 

 

 

2. VC

1. CUTOFF(R/G)

 

 

 

 

 

2. DRIVE(R/G/B)

 

 

 

 

 

3. BRIGHT

 

 

 

 

 

4. CONT

 

 

 

 

 

5. COLOUR

 

 

 

 

 

6. TINT

 

 

 

 

 

7. SHARP

 

 

 

 

 

 

 

 

 

 

 

 

 

 

8. YDELAY

 

 

 

 

 

 

 

 

 

Do not adjust

 

 

 

 

9. AMP T. SHARP

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3. DEF

1. VER. SLOPE

 

 

 

 

 

2. VER. HEIGHT

 

 

 

 

 

3. VER. POSITION

 

 

 

 

 

4. VER. SCURVE

 

 

 

 

 

5. HOR. POSITION

 

 

 

 

 

6. HOR. WIDTH

 

 

 

 

 

7. EW-PIN

 

 

 

 

 

8. EW-TRAPEZ

 

 

 

 

 

9. UP CORNER

 

 

 

 

 

10. DW CORNER

 

 

 

 

 

11. HOR. PARALL

 

 

 

 

 

12. HOR. BOW

 

 

 

 

 

13. V. ZOOM

 

 

 

 

 

 

 

 

 

 

 

4. VSM PRESET

1. TINT

 

 

(BRIGHT/STD/SOFT)

2. COLOUR

 

 

 

 

 

3. BRIGHT

 

 

 

Do not adjust

 

 

 

 

 

 

4. CONT

 

 

 

 

 

5. SHARP

 

 

5. PRESET

1. PSNS

 

 

 

2. ACL

 

Do not adjust

 

 

 

 

 

 

 

3. MUS

 

 

 

4. MAT

 

 

 

5. FCO

 

 

 

6. BPS

 

 

 

7. IFLH

 

 

 

8. VID

 

 

 

9. STM

 

 

 

10. AFCW

 

 

 

11. VSW

 

 

 

12. FFI

 

 

 

13. AGC

 

 

 

14. CL

 

 

 

15. AKB

 

 

 

16. HBL

 

 

 

17. BKS

 

 

 

18. READ STATUS

 

 

 

19. VNR

 

 

 

20. PEAK

 

 

 

21. IVG

 

 

 

22. WPL

 

 

 

23. SOFT CLIPPER

 

 

 

24. IF PLL OFFSET

 

 

 

25. OVERSHOOT

 

 

 

26. HCO

 

 

 

27. HP2

 

 

 

28. AI VOLUME ADN

 

 

 

29. SUB BASS 3D

 

 

 

30. SUB TREBLE 3D

 

 

 

31. CCCLOOP

 

 

 

 

6. A2NICAM

1. ERROR LIMIT

[AV-25LS3, AV-25LS3/AU ,

2. A2 ID THR

AV-25LH3 only]

3. SOUND SYSTEM

 

 

 

 

 

 

 

 

Do not adjust

 

 

6/7. PLUG & PLAY(ON)

Do not adjust

Table 3

12

No. 52033

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