Zenith L20V26 Service manual

SERVICE MANUAL

Product Type: LCD TV

Chassis: MF-002A

Manual Series: CM154

Manual Part #: 923-03488

Model Line: E

Product Year: 2002

Model Series:

L20V26

Printed in U.S.A.

CONTENTS

Safety .......................................................... 2

Overview ...................................................... 5

Servicing ................................................... 12

Parts ......................................................... 13

Diagrams .................................................... 19

Schematic .................................................. 25

Published June 2002 by Technical Publications

Zenith Electronics Corporation

201 James Record Road

Huntsville, Alabama 35824-1513

Copyright



2002 by Zenith Electronics Corporation

PRODUCT SAFETY

PRODUCT SAFETY

IMPORTANT SAFETY NOTICE

This manual was prepared for use only by properly trained audiovisual service technicians. When servicing this product, under no circumstances should the original design be modified or altered without permission from Zenith Electronics Corporation. All components should be replaced only with types identical to those in the original circuit and their physical location, wiring, and lead dress must conform to original layout upon completion of repairs. If any fuse (or Fusible Resistor) in this TV receiver is blown, replace it only with the factory specified fuse type and rating. When replacing a high wattage resistor (Oxide Metal Film Resistor, over 1W), keep the resistor 10mm away from PCB. Always keep wires away from high voltage or high temperature parts.

Special components are also used to prevent shock and fire hazard.

These components are indicated by the letter “x” included in their component designators and are required to maintain safe performance. No deviations are allowed without prior approval by

Zenith Electronics Corporation. Service work should be performed only after you are thoroughly familiar with these safety checks and servicing guidelines.

Circuit diagrams may occasionally differ from the actual circuit used.

This way, implementation of the latest safety and performance improvement changes into the set is not delayed until the new service literature is printed.

CAUTION: Do not attempt to modify this product in any way. Never perform customized installations without manufacturer’s approval.

Unauthorized modifications will not only void the warranty, but may lead to property damage or user injury.

GENERAL GUIDANCE

An lsolation Transformer should always be used during the servicing of a receiver whose chassis is not isolated from the AC power line. Use a transformer of adequate power rating to protect against personal injury from electrical shocks. It will also protect the receiver and its components from being damaged by accidental shorts of the circuitry that may be inadvertently introduced during the service operation.

Before returning the receiver to the customer, always perform an AC leakage current check on the exposed metallic parts of the cabinet, such as antennas, terminals, etc., to be sure the set is safe to operate without damage of electrical shock.

LEAKAGE CURRENT COLD CHECK (ANTENNA COLD CHECK)

With the instrument AC plug removed from AC source, connect an electrical jumper across the two AC plug prongs. Place the AC switch in the on position, connect one lead of ohm-meter to the AC plug prongs tied together and touch other ohm-meter lead in turn to each exposed metallic parts such as antenna terminals, phone jacks, etc. If the exposed metallic part has a return path to the chassis, the measured resistance should be between 1M

Ω and 5.2M

Ω

. When the exposed metal has no return path to the chassis the reading must be infinite. Any other abnormality that exists must be corrected before the receiver is returned to the customer.

ELECTROSTATICALLY SENSITIVE DEVICES

Some semiconductor (solid-state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field-effect transistors and semiconductor “chip” components. The following techniques should be used to help reduce the incidence of component damage caused by static electricity.

1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any electrostatic charge on the body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging wrist strap device, which should be removed for potential shock reasons prior to applying power to the unit under test.

2. After removing an electrical assembly equipped with ES devices, place the assembly on a conductive surface such as an ESD mat, to prevent electrostatic charge buildup or exposure of the assembly.

3. Use only a grounded-tip soldering iron to solder or unsolder ES devices.

4. Use only an anti-static solder removal device. Some solder removal devices not classified as “anti-static” can generate electrical charges sufficient to damage ES devices.

5. Do not use freon-propelled chemicals. These can generate electrical charge sufficient to damage ES devices.

6. Do not remove a replacement ES device from its protective package until immediately before you are ready to install it. (Most replacement ES devices are packaged with leads electrically shorted together by conductive foam, aluminum foil, or comparable conductive material.)

7. Immediately before removing the protective material from the leads of a replacement ES device, touch the protective material to the chassis or circuit assembly into which the device will be installed.

Caution: Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.

8. Minimize bodily motions when handling unpackaged replacement ES devices. (Otherwise, seemingly harmless motion, such as the brushing together of your clothing or the lifting of your foot from a carpeted floor, can generate static electricity sufficient to damage an ES device.)

REGULATORY INFORMATION

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules.

These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: Reorient or relocate the receiving antenna; Increase the separation between the equipment and receiver; Connect the equipment into an outlet on a circuit different from that to which the receiver is connected; Consult the dealer or an experienced radio/TV technician for help.

The responsible party for this device’s compliance is:

Zenith Electronics Corporation


Huntsville, AL 35824, USA

Digital TV Hotline: 1-800-243-0000

CM154 - 923-03488 2 L20V26 - SAFETY

TABLE OF CONTENTS

PRODUCT SAFETY ................................................ 2

TABLE OF CONTENTS ............................................ 3

OVERVIEW ........................................................ 5

WARRANTY/SERVICE ........................................ 5

FEATURES ..................................................... 5

SPECIFICATIONS ............................................. 5

REMOTE CONTROL ........................................... 6

FRONT .......................................................... 7

BACK ........................................................... 7

USER MENUS ..................................................... 8

MENU LANGUAGE ............................................ 8

CLOSED CAPTIONING ....................................... 8

PARENTAL CONTROL ........................................ 9

CHANNEL SEARCH ........................................... 9

SLEEP TIMER ............................................... 10

AUDIO SETUP .............................................. 10

VIDEO ........................................................ 11

SERVICING ...................................................... 12

ADJUSTMENTS .............................................. 12

PARTS ............................................................ 13

MODEL PARTS .............................................. 13

COMPONENT PARTS ....................................... 13

DIAGRAMS ...................................................... 19

EXPLODED VIEW ........................................... 19

BLOCK DIAGRAM .......................................... 20

MAIN PCB LAYOUT ........................................ 21

MX PCB LAYOUT ........................................... 22

TUNER PCB LAYOUT ....................................... 23

CONTROL PANEL PCB LAYOUT .......................... 23

MAIN L20V26 CIRCUIT ...................................... 25

CM154 - 923-03488 3 L20V26 - TOC

- 4 -

OVERVIEW

GENERAL INFO

WARRANTY/SERVICE

This model is a Factory Service Repair model (in and out of warranty) and is covered by a one year limited warranty. For service, the end user should call 1-800-

984-9349 for complete shipping and handling instructions (or call 1-877-9ZENITH). Refer to the last page of the opguide for more information.

FEATURES

20.1" EDTV MONITOR

Truly Flat LCD screen delivers razor sharp images.

BUILT IN NTSC TUNER

Accepts cable/antenna, HDTV, satellite dish, and NTSC video sources

640 X 480 RESOLUTION

High resolution format produces extremely detailed imagery

400:1 HIGH CONTRAST RATIO

LCD technology emits sharp contrast between light and dark images

450 CD/M2 HIGH BRIGHTNESS

Renders an incredibly bright picture, even in light-drenched environments

140 X 120 DEGREES VIEWING ANGLE

Allows for distortion-free viewing from almost any angle

HI-RES COMPONENT, S-VIDEO, RF, AV INPUTS

Multiple inputs for DVD players, VCRs, computers, and video game systems

INNOVATIVE DESIGN

Lightweight and compact frame includes built in speakers

4H DIGITAL COMB FILTER

Accurately separates color data (chroma, or C) from black and white data (lumina, or Y) to produce improved color images and picture quality.

EDTV

Uses progressive scan technology to display noticeably higher quality images than the conventional “interlacing” method.

DIGITAL PROGRESSIVE SCAN

Lines of video data are processed faster and sequentially, a significant improvement on the old

“interlacing” method. This allows the TV to display crisp, clear images when receiving data from a DVD player or other video sources requiring more bandwidth.

NTSC TUNER

Accepts standard United States broadcast video signals as designated by the National Television

Standards Committee.

HI-RES COMPONENT VIDEO

Delivers the highest quality picture by breaking down video data into three separate signals—red, blue and luminance—before the data is sent to the television.

SPECIFICATIONS

VIDEO ENHANCEMENTS

Screen Size ............................................... 20.1"

Flat ............................................................. Yes

Resolution Display ...................... 640 x 480 (VGA)

Color Depth ..................................... 16M (8-Bit)

Aspect Ratio ................................................ 4:3

Contrast Ratio ........................................... 400:1

Brightness ........................................ 450 cd/m2

High Drive Video Watts ................................ 70W

Viewing Angle .................................. 140º x 120º

Tuning System ........................................ NTSC-M

Comb Filter ......................................... 4H Digital

Digital Progressive Scan ................................. Yes

Black level Exp./White Level Compression .......... Yes

AUDIO ENHANCEMENTS

On Screen Equalizer ........................................ Yes

Gradual Volume Increase ................................. Yes

Mono/Stereo/MTS/SAP ................................... Yes

Bass/Treble/Balance ......................... Balance Only

Total Audio (Watts) .......................... 6W (2 x 3W)

Auto Volume Leveler ...................................... Yes

SPECIAL FEATURES

DRP (Digital Reality Processor) ........................ Yes

CTI (Chrominance Transient Improvement) ........ Yes

LTI (Luminance Transient Improvement) ........... Yes

Tri-lingual Menus ............ English, Spanish, French

Auto Programming ......................................... Yes

Parental Control w/V-Chip ............................... Yes

Auto Picture ................................................. Yes

Auto Sleep (Power/Off) ................................... Yes

Flashback ..................................................... Yes

CC ............................................................... Yes

CC When Mute ............................................... Yes

Auto Power on and Last Source Memory ............ Yes

CM154 - 923-03488 5 L20V26 - OVERVIEW

OVERVIEW

CABINET DESCRIPTION

Finish .......................................... Brushed Silver

Cabinet Style .............................................. New

REMOTE CONTROL

Transmitter ................................................... Yes

Model Number ...................................... MF-002A

Transmitter Finish ................................ Off-White

REQUIRED APPROVALS

UL, C-UL, NOM ........................... UL, C-UL, FCC (B)

SERVICE/LIMITED WARRANTY

Warranty: Parts/Labor ...................... 1 Year/1 Year

MTBF (Approx.) .................................. 40K Hours

DIMENSIONS

Width x Height x Depth (Monitor)27.4" x 19" x 7.7"

Weight ................................................. 30.2 lbs

DIMENSIONS WITH PACKAGING

Width x Height x Depth ........ 22.8" x 24.8" x 11.9"

Weight ................................................ 36.4 lbs.

UPC Code .................................... 4464200402 6

REMOTE CONTROL

POWER BUTTON

NUMBER BUTTONS

FLASHBK BUTTON

MENU BUTTON

CHANNEL BUTTONS

MTS BUTTON power tv/video

1

4

7 flashbk menu vol mts

8

0

2

5 ch enter ch vol sleep

3

6

9 cc mute

TV/VIDEO BUTTON

CAPTION BUTTON

MUTE BUTTON

ENTER BUTTON

VOLUME BUTTONS

SLEEP BUTTON

CM154 - 923-03488 6 L20V26 - OVERVIEW

FRONT

OVERVIEW

Channel Buttons

Volume Buttons

Enter Button

Menu Button

TV/Video Button

Remote Control Sensor

Power/Standby indicator

Illuminates brightly when the

TV is in standby mode. Dims when the TV is switched on.

Power button

BACK

DC (15V) Y PB PR

(480i/480p)

DVD / DTV

S

ANT IN

75

Ω

DC

12V/0.2A

CM154 - 923-03488

DC IN (15V)

Power Input

Y P

B

P

R

COMPONENT(480i/480p)

DVD / DTV IN

L

AUDIO

R

H/P S-VIDEO

VIDEO MONO L AUDIO R

IN

VIDEO L AUDIO R

MONITER OUT

L L

75

Ω

12V/0.2A

Headphone

DVD/DTV Input

Jack

Audio/Video

Input

Monitor Output

S-Video Input

Power Output

Antenna Input

7 L20V26 - OVERVIEW

USER MENUS

USER MENUS

Press the menu button to display the available menus.

Use the channel up/down buttons to select a menu option.

MENU LANGUAGE

Language

Captions

Caption/Text

Parental Ctl

English

Off

CC 1

CC 1

CC 2

CC 3

Text 1

Text 2

Text 3

CC 4 Text 4

Press the enter button to accept and exit. This TV is programmed to remember the caption/text mode it was last set when you turn the POWER off.

EZ MUTE SETUP

Use

D E F G And A

Use the channel up/down buttons to select the Language option. Use the volume up/down buttons to select the language. Each press of volume up/down buttons changes the menu language between English, Spanish, and French.

Press the enter button to exit.

CLOSED CAPTIONING

OVERVIEW

Closed captioning is a process which converts the audio portion of a television program into written words which then appear on the television screen in a form similar to subtitles. Closed captions allow viewers to read the dialogue and narration of television programs.

Not all TV broadcasts include closed caption signals.

Sometimes TV stations broadcast four different caption signals on the same channel. By selecting From CC1 to

CC4, you can choose which signal you view. CC1 is usually the signal with the captions, while Another mode might show demonstration or programming information.

CAPTIONS/TEXT SETUP

Captions

Use

Off

And

Use the CC button to select Captions. Each press of volume up/down buttons changes the caption option between off, on, or EZ Mute. EZ Mute shows the selected captions option (if available on program) when the TV sound is muted.

TEXT SETUP

Language

Captions

Caption/Text

Parental Ctl

English

Off

Text 1

Use And

Language

Captions

Caption/Text

Parental Ctl

English

Off

CC 1

Use And

Use the menu button to select the menu shown. Use the channel up/down buttons to select the Caption/

Text option. Each time you press the volume up/down buttons, the caption mode is cycled to the next option.

Text services can give a wide variety of information like captioned program lists, weather forecasts, stock exchange topics, or news for hearing impaired. But not all stations offer text services, even though they might offer captioning.

In the event you are receiving a poor signal, an empty black box may appear and disappear, even when the text mode is selected.

CM154 - 923-03488 8 L20V26 - MENUS

USER MENUS

PARENTAL CONTROL

Language

Captions

Caption/Text

Parental Ctl

English

Off

CC 1

Use And

The Parental Control Function (V-Chip) is used to block program viewing based on the ratings sent by the broadcast station. The default setting is to allow all programs to be viewed. Viewing can be blocked by the type of program and by the categories chosen to be blocked. It is also possible to block all program viewing for a time period. To use the Parental Control

Function, the following must be set.

1. Ratings and categories to be blocked.

2. Number of hours to lock the television viewing control

3. Set a password

4. Enable the lock

BLOCKING SETUP

Use the channel up/down buttons to select the Parental

Ctl option. Press the volume down button. Age block and Content block options also have sub-menus to set the type of blocking and rating. Use the channel up/down buttons to select the types of blocking to be set. Use the volume up/down buttons to select the types of ratings to block. MPAA, Age, and/or Content block may be set.

Aux. Block

MPAA

Sources Unblocked

Unblocked

Age Block

Content Blk

Set Hours

Set Password

00 Hours

To Set

Lock On/Off Must Set Hours

Use And

Press the menu button to return from the Age Block or

Content Blk options. Use the channel up/down buttons to select the Set Hours option. Use the volume up/ down buttons to set the number of hours for the blocking (Up to 99).

Use the channel up/down buttons to select the Set

Password option. Enter a four digit password. Enter it again when requested. A new password may be chosen each time blocking is set up. Press the channel up/ down buttons to select the Lock on/off option. Press the volume up/down buttons to turn the lock On. Press the menu button to save the blocking setups and exit.

V-CHIP RATINGS

Most television programs and television movies can

CM154 - 923-03488 9 be blocked by TV Rating and/or Individual Categories.

Movies that have been shown at the theaters or directto-video movies use the Movie Rating System(MPAA) only.

Movies Ratings:

* Unblocked

* G - General audience

* PG - Parental guidance suggested

* PG-13 - 13 years and older

* R - Restricted

* NC-17 - 17 years and older

* X - Adult

General TV Ratings:

* Unblocked

* TV-G - General audience

* TV-PG - Parental guidance suggested

* TV-14 - 14 years and older

* TV-MA - Mature audience

Children TV Ratings:

* Unblocked

* TV-Y - youth

* TV-Y7 - youth, 7 years and older

Content Categories:

* Dialog - sexual dialogue (applies to TV-PG, TV-14)

* Language - adult language (applies to TV-PG, TV-

14, TV-MA)

* Sex scenes - sexual situations (applies to TV-PG,

TV-14, TV-MA)

* Violence (applies to TV-PG, TV-14 and Above, TV-

MA)

* F Violence - fantasy violence (applies only to TV-

Y7)

* No Rating (blocks all viewing)

CHANNEL SEARCH

AUTO PROGRAM

Auto Program

Manual Program

Fine

Use And

Auto programming memorizes all the channels from terrestrial TV signals or a cable TV service provider. If channels from TV and cable TV search are duplicated, press the number buttons (0 - 9) to change.

L20V26 - MENUS

USER MENUS

Press the volume up button to begin the channel search. Wait for auto program to complete the channel search cycle before choosing a channel. The TV scans for over-the-air channels and then channels provided by a cable service.

If you press the enter button during auto programming, the function will stop and only channels found up to that time will be added. When the channel search is complete, use the channel up/down buttons to review the memorized channels.

MANUAL PROGRAM

You can select Memory to add the channel or Erase to delete the channel from memory.

Sleep ---

Use And

- - -

240

180

120

Auto Program

Fine

Use And

Use the menu button to select the menu shown and then use the channel up/down buttons to select the

Manual Program option. Press the volume up/down buttons.

90

10

20

30

60

To cancel sleep time setting, press the sleep button repeatedly to select [ — ]. When a sleep time you want is displayed on the screen, let the screen display disappear and the sleep time is set.

To check remaining sleep time, press the sleep button once. If you turn the TV off after setting sleep timer, the setting will be erased.

AUDIO SETUP

MTS

Balance

AVL

DASP

Equalizer

Mono

0

Off

User

Manual Program

Use And

The current channel number is displayed. Use the channel up/down buttons to select a channel you want to add to memory or erase and then use the volume up/down buttons to select Memory (add) or Erase

(delete). Each time you press the volume up/down buttons, you toggle between Memory and Erase.

Manual Program

Use And

Erase

Press the enter button to select and exit. The current channel is added to Memory or Erased from the channel list.

SLEEP TIMER

Sleep timer turns the TV off at a preset time. Use the sleep button to set sleep timer. Each press of sleep changes the setting as shown below.

CM154 - 923-03488 10

AVL SETUP

AVL (Auto Volume Leveler) maintains an equal volume level automatically even if the channel is changed.

Use the channel up/down button to select the AVL option. Use the volume up/down button to select on or off and then press the enter button.

SOUND BALANCE

Use the channel up/down button to select the Balance option. Press the volume up/down button to adjust the balance and press the enter button to save. Balance is preset at 0 (center).

SAP (SECOND AUDIO PROGRAM)

SAP contains the secondary language signal in addition to the primary language. There are the primary and secondary languages and stereo modes in bilingual signal.

L20V26 - MENUS

USER MENUS

Use the channel up/down button to select the MTS option. Each press of volume up/down buttons changes the audio mode as shown. Press the enter button to select and exit.

DASP

Use the menu button to select the Audio menu. Press the channel up/down buttons to select the DASP option.Each press of volume up/down button changes the DASP sound option between User, Cinema, Sports, or Music.

EQUALIZER ADJUSTMENTS

Use the channel up/down buttons to select the User/

Equalizer option. Use the volume up/down button to select a band to adjust. Use the channel up/down buttons to adjust the band level. Select another band to adjust or press the enter button to select and exit.

MUTE

Mute removes the speaker sound. Press mute on the remote to mute the sound. To restore sound, press the mute button or volume up/down buttons. When muted sound is restored, current volume level is displayed on the screen.

HEADPHONE JACK

Plug a Headphone into the jack. Adjust the sound level to a headphone using the volume up/down buttons. While listening to sound through a headphone(s), TV speakers are turned off.

VIDEO

Contrast

Brightness

Color

Tint

Sharpness

APC

DRP

Use

100

60

60

0

70

Clear

Clear

And

APC (AUTO PICTURE CONTROL)

APC adjusts the TV for the best picture appearance.

Use the channel up/down buttons to select the APC option. Each press of volume up/down button selects a different picture appearance. Options are Clear,

Optimum, User, and Soft. Press the enter button to select and exit.

Contrast

Brightness

Color

Tint

Sharpness

DRP

Use And

Clear

100

60

60

0

70

Clear

User

Optimum

Soft

MANUAL PICTURE CONTROL

Use the volume up/down button to change the settings. Contrast, Brightness, Sharpness, and Color are adjustable from 0 to 100. Tint is adjustable from

Red 50 to Green 50. Press the enter button to select and exit. APC is turned off if you change any settings.

DRP (DIGITAL REALITY PICTURE)

DRP improves picture outline dark areas. Use the channel up/down button to select the DRP option.

Use the volume up/down buttons to select Clear and then press the enter button. Each press of volume up/ down buttons changes the screen display to Clear or

Soft.

FINE TUNING

Fine Tuning optimizes reception of a poor signal. For example, a horizontal stripe, twisted picture, no color, or weak station.

Use the channel up/down buttons to select the Fine option. Press the volume up button. Use the volume up/down buttons to improve the picture (signal) reception. When the picture appearance is best, press the enter button.

CM154 - 923-03488 11 L20V26 - MENUS

SERVICING

SERVICING

ADJUSTMENTS

APPLICATION OBJECT

Notes

(1) This set uses an adapter, so connect the adapter and the set correctly before adjustment.

(2) The adjustment must be performed under the correct sequence.

(3) The adjustment must be performed in the circumstance of 25 +/-5 °C and 65 +/-10% of relative humidity if there is no specific designation.

(4) The input voltage of the receiver must keep 110V,

60Hz during adjustment.

(5) The set must be operated for 30 minutes before adjustment.

(6) Heat Run must be performed with a full white signal or TV noise signal.

DVCO ADJUSTMENT

(1) Receive the Digital Pattern.

(2) Select DVCO ADJ by pressing ADJ Key (or SVC Key) of Remote Control for Adjustment.

(3) Press the VOL + Key repeatly to appear (OK).

AUTO RGB ADJUSTMENT

(1) Adjust RGB after performing DVCO Adjustment.

(2) Receive a Digital Pattern.

(3) Select AUTO RGB ADJ by pressing ADJ Key (or SVC

Key) of Remote Control for Adjustment.

(4) Press the VOL + Key repeatly to appear (OK).

RGB LEVEL ADJUSTMENT

Equipment

(1) Pattern Generator (408NPS-READER) with 10 STEP if available.

(2) A Remote Control for Adjustment.

Adjustment

(1) Select RGB LEVEL by pressing ADJ Key (or SVC

Key) of Remote Control for Adjustment.

(2) Select it by using VOL + Key.

(3) Adjust that until 9th and 10th STEP is undistinguished by using VOL +/- Key in R-DRIVE item.

(4) Adjust G-DRIVE and B-DRIVE.

(5) When adjustment is finished, exit by pressing

ENTER Key.

USING METHOD FOR CA-110

Use it in case of needing adjustment brightness.

CA110

Screen

30 [cm]

LCD TV

Input signal of Video

NTSC 13 CH

CM154 - 923-03488 12 L20V26 - SERVICING

PARTS

PARTS

This model is a Factory Service Repair model (in and out of warranty) and is covered by a one year warranty. For service, the end user should call 1-800-984-9349 for complete shipping and handling instructions (or call 1-

877-9ZENITH). Refer to the last page of the opguide for more information.

Parts contact information:

Voice: 1-888-3-ZENITH

Fax: 1-888-6-ZENITH

Mail: Zenith National Parts


Huntsville, AL 35824-1513

MODEL PARTS

9

1 0

1 1

1 2

1 3

1 4

1 5

6

7

4

5

8

LOC.

PART NO.

1

2

3

3091V00A20G

120-D44E

6871VSMA75F

DESCRIPTION

CABINET ASSY, ZENITH

SPEAKER G705/080701A MOTORJOY 4OHM

POWER PCB ASSY

5020V00553E

5020V00552H

6871VSMA74A

6304VT2011A

6633VA0003D

BUTTON SET (#39)

BUTTON SET

CTL PCB ASSY

LCD,LC201V1-A1 20.1

INVERTER ASSY, 15VOLT KUBNKM022A

6871VSM814B

6871VMM644L

6871VSM812B

3809V00A10J

3550V00202A

4950V00081B

4811V00019E

MX PCB ASSY

MAIN PCB ASSY

TUNER PCB ASSY

BACK COVER ASSY

A/V COVER ABS

METAL HINGE FIXER SUS304

BRACKET ASSY

COMPONENT PARTS

LOC.

PART NO.

DESCRIPTION

C10 0CQ3321N509 CAP,FIXED, 0.0033UF D 100V 10%

C101 0CE476DH618 CAP,FIXED ELECTRO, 47UF STD 25V 20%


C104 0CE108DD618 CAP,FIXED ELECTRO, 1000UF STD 10V 20%

C107 0CE106DK618 CAP,FIXED ELECTRO, 10UF STD 50V 20%



C1102 0CN1030F679 CAP,FIXED TUBULAR(HDE), 10000PF D 16V

20%

C112 0CE475DK618 CAP,FIXED ELECTRO, 4.7UF STD 50V 20%




C205 0CE107DF618 CAP,FIXED ELECTRO, 100UF STD 16V 20%







CM154 - 923-03488 13

C240 0CK224DF56A CAP,FIXED CERAMIC(HDE), 220000PF 2012

16V 10%


16V 10%




16V 10%


16V 10%



16V 10%


16V 10%


16V 10%



16V 10%



16V 10%

C262 0CE4741K636 CAP,FIXED ELECTRO, 0.47UF SM,SA 50V

20%



20%


20%












C408 181-007H CAP,DRAWING, MPE ECQ-V1H474JL3(TR),

50V 0.47UF



C419 0CE105BK618 CAP,FIXED ELECTRO, 1UF KME TYPE 50V

20%

C422 181-007H CAP,DRAWING, MPE ECQ-V1H474JL3(TR),

50V 0.47UF



20%

C435 0CE107BF618 CAP,FIXED ELECTRO, 100UF KME TYPE 16V

20%


20%


20%

C604 0CE107SF6DC CAP,FIXED ELECTRO, 100UF MVG 16V 20%

SMD


SMD

L20V26 - PARTS

PARTS

C607 0CE106SH6DC CAP,AL.ELECTRO, 10UF MVG 25V M SMD R


SMD


SMD

C640 0CE227SC6DC CAP,FIXED ELEC, 220UF MVG 6.3V M SMD

C641 0CE227SC6DC CAP,FIXED ELEC, 220UF MVG 6.3V M SMD





20%


20%


20%


20%

C807 0CE227BH618 CAP,FIXED ELECTRO, 220UF KME TYPE 25V

20%


20%








20%


20%




20%




20%


20%

C909 0CE225BK618 CAP,FIXED ELECTRO, 2.2UF KME TYPE 50V

20%



20%






20%

C928 0CE225BK618 CAP,FIXED ELECTRO, 2.2UF KME TYPE 50V

20%


20%


16V 10%


16V 10%

CM154 - 923-03488 14



16V 10%


16V 10%


16V 10%



16V 10%




C95 0CE105CK636 CAP,FIXED ELECTRO, 1UF SHL,SD 50V 20%




20%



D1 0DD181009AB DIODE,SWITCHING, KDS181 TP KEC

85V,300MA

D801 0DL112100AB LED, SM3411(DL-11S2GN1) Y-GREEN -

D802 0DL112100AA LED, SR3411(DL-11S2RN1) RED -

D804 0DD100009AM DIODE,RECTIFIERS, EU1ZV(1) 200V 0.25A

15A 0.4US


85V,300MA


85V,300MA


85V,300MA


85V,300MA


85V,300MA

DJ201 380-362K JACK,RCA, PJ 6035K PARKELEC 2P

EJ201 6613V00008F JACK ASSY, PMJ014F PARK ELEC E/

F801 0FS6300B84B FUSE,SLOW BLOW, SLOW BLOW 630MA 250

F802 0FT2001A86B FUSE,TIME LAG, 2000MA 125 V 8.6X4X8

IC1 0IZZVC0013H IC,DRAWING, SDA555X 52PIN , ST I

IC10 0ISA721700C IC,SANYO, LA7217M MFP14 TP SYNC

SEPARATOR ML-00BA

IC2 0IAL241610B IC,ATMEL, AT24C16-10PC-2.7 8PIN DIP ST

EEPROM

IC201 0IIT323000D IC,ITT, VPC3230D QA B4 80P

IC3 0ICTMZI001A IC,CUSTOMIZED, Z8622912SSC ZILOG 18

IC301 0IHY100100A IC,HYUNDAI, LGTV1001 64P QFP PROG. H-

FILTER

IC302 0ISM941000A IC,SIEMENS, SDA9410 100QFP SCAN CONV.

FD-60X3R

IC303 6200VKR001A FILTER(CIRC),BAND PASS, LPF 1EA SMD

H354LAI-K5206

IC305 6200VKR001A FILTER(CIRC),BAND PASS, LPF 1EA SMD

H354LAI-K5206

IC4 0IFA752700A IC,FAIRCHILD, KA75270Z 3 TP RE-SET IC

MC-007

IC401 0ISO210100B IC,SONY, CXA2101AQ 80P,QFP VIDEO

SIGNAL PROCESSOR

IC402 0ISH092100B IC,SHARP, PQ09RD21 4SIP ST REGULATOR


L20V26 - PARTS

PARTS

IC501 0ITI808300B IC,TEXAS INSTRUMENT, THS8083 100QFP

ADC IC PD-40X3

IC502 0IMR882840B IC,MACRONIX, MX88L284-V 208QFP SCALE

MF004A

IC505 0ISS416162B IC,SAMSUNG,K4S161622D-TC80 50 TSOP

SDRAM

IC506 0TF492509AA TRANSISTOR,FETS, SI4925DY TP TEMIC 30V

6.1A

IC507 0IKE702700D IC,KEC, KIA7027AF 3, SOT-89 TP RESET IC

2.7V

IC508 0ICTMMO001A IC,CUSTOMIZED, SC786104DWR2 MOTOROL

IC509 0IKE703300E IC,KEC, KIA7033AF 3P SOT-89

IC801 0ITC786000A IC,TEMIC, SI786 28SSOP

IC802 0TFVI80001A TRANSISTOR,FETS, VISHAY SI4808DY

IC803 0TFVI80001A TRANSISTOR,FETS, VISHAY SI4808DY


6.1A


6.1A


6.1A

IC809 0IKE781200P IC,KEC, KIA7812API TO220 ST 3P 12V

REGULATOR


IC851 0ISH323422A IC,SHARP, PQ3RF23 4P(TO-220) 3.3V

REGUL

IC852 0IKE780500P IC,KEC, KIA78L05BP(AT) 3P 5V,150MA

IC853 0ISH052100C IC,SHARP, PQ05RD21 4SIP ST REGULATOR


IC901 0IMCRMN002A IC,MICRO CONTROLLER, MSP3400G QA B6

MICRO

IC902 0IKE703300E IC,KEC, KIA7033AF 3P SOT-89

IC903 0IKE780800J IC,KEC, KIA7808API 3 ST REGULATOR

IC904 0IKE780500Q IC,KEC, KIA7805API 3P TO-220 ST

REGULATOR 5V(=KIA7805PI)

IC905 0ISA428200A IC,SANYO, LA4282 12S 2CHX10W AUDIO

AMP

L1 0IFA270000A IC,FAIRCHILD, 2N7000TA TO-92, LEVEL

SHIFT 60V/0.2A,MC007A

L101 6210TCE001G FILTER(CIRC),EMC, HH-1M3216-501

CERATEC 3216MM


CERATEC 3216MM

L103 0LA0272K139 INDUCTOR,AXIAL LEAD, 27UH 10% A 4.0 X

10.5

L1101 0LA0222K119 INDUCTOR,AXIAL LEAD, 22UH 10% A 2.3 X

3.4

L2 0IFA270000A IC,FAIRCHILD, 2N7000TA TO-92, LEVEL

SHIFT 60V/0.2A,MC007A

L207 6210TCE001A FILTER(CIRC),EMC, HB-1S2012-080JT

CERATEC


CERATEC


CERATEC 3216MM


CERATEC


CERATEC

L214 0LA0331K119 INDUCTOR,AXIAL LEAD, 3.3UH 10% A 2.3

X 3.4


X 3.4


X 3.4


X 3.4


X 3.4


CERATEC 3216MM


CERATEC 3216MM


CERATEC 3216MM


CERATEC 3216MM


CERATEC 3216MM


CERATEC 3216MM


CERATEC 3216MM


CERATEC


CERATEC 3216MM


CERATEC 3216MM


CERATEC 3216MM


CERATEC


CERATEC

L519 6210TCE001E FILTER(CIRC),EMC, HB-1M2012-800JT

CERATEC 2012MM


CERATEC 3216MM


CERATEC 3216MM


CERATEC 3216MM

L801 6140VB0004B COIL,CHOKE, 26UH 1UEWPHY 22.5TURN

YL-9N 0.4

L802 6140VB0004B COIL,CHOKE, 26UH 1UEWPHY 22.5TURN

YL-9N 0.4


CERATEC 3216MM

L804 6140VB0004A COIL,CHOKE, 9.5UH 1UEWPHY 13.5TURN

YL-9N 0.5


CERATEC 3216MM


CERATEC 3216MM


CERATEC 3216MM


CERATEC 3216MM


CERATEC 3216MM


CERATEC 3216MM


CERATEC 3216MM

CM154 - 923-03488 15 L20V26 - PARTS

PARTS


CERATEC 3216MM


CERATEC 3216MM

LA801 6210VC0004A FILTER(CIRC),EMC,3216 4S600

TAIYOYUDEN


TAIYOYUDEN


TAIYOYUDEN


TAIYOYUDEN


TAIYOYUDEN


TAIYOYUDEN


TAIYOYUDEN


TAIYOYUDEN


TAIYOYUDEN


TAIYOYUDEN


TAIYOYUDEN

LD11010DL112100AB LED, SM3411(DL-11S2GN1) Y-GREEN -

MJ201 6613V00004P JACK ASSY, PJ6054P PARK ELEC R

P 1 5240VE0001F LEAD SET, UL 1015 AWG 22 TWI 3

P1101 6631V20014E CONNECTOR ASSY, 12P 300MM H-B UL 100

P1103 6631V25049F CONNECTOR ASSY, 4P 250MM H-B UL1007

PA1101 6726VV0006D REMOTE CONTROL RECEIVER, TSOP4838ON1

TEMIC 38.0KHZ HOLDER LESS

PJ801 6612VAH001C JACK,HEADPHONE, DC-003 UNITOP 4PIN

POWER JACK .

PJ802 6612TAH002A JACK,HEADPHONE, DC-001 UNITOP DC-001

2.0MM (UNITOP)

Q1 0TR387500AA TRANSISTOR, BIPOLARS, CHIP

2SC3875S(ALY)

Q101 0TR387500AA TRANSISTOR, BIPOLARS, CHIP

2SC3875S(ALY)

Q103 0TR387500AA TRANSISTOR,BIPOLARS, CHIP

2SC3875S(ALY)

Q1101 0TR126609AA TRANSISTOR,BIPOLARS, KTA TP KEC - 1266-

-Y (KTA1015)


2SC3875S(ALY)


2SC3875S(ALY)


2SC3875S(ALY)


2SC3875S(ALY)


2SC3875S(ALY)


2SC3875S(ALY)


2SC3875S(ALY)


2SC3875S(ALY)


2SC3875S(ALY)

CM154 - 923-03488 16


2SC3875S(ALY)


2SC3875S(ALY)


2SC3875S(ALY)

Q214 0TR150400BA TRANSISTOR,BIPOLARS, CHIP

2SA1504S(ASY)


2SA1504S(ASY)


2SC3875S(ALY)


2SC3875S(ALY)


2SC3875S(ALY)


2SA1504S(ASY)


2SA1504S(ASY)


2SA1504S(ASY)


2SA1504S(ASY)


2SA1504S(ASY)


2SA1504S(ASY)


2SA1504S(ASY)


2SA1504S(ASY)


2SA1504S(ASY)


2SC3875S(ALY)


2SC3875S(ALY)


2SC3875S(ALY)


2SC3875S(ALY)


2SC3875S(ALY)


2SC3875S(ALY)


2SA1504S(ASY)


2SA1504S(ASY)


2SA1504S(ASY)

R1101 0RD4701F609 RESISTOR,CARBON FILM, 4.7KOHM 1/6W

5%

R1102 0RD3300F609 RESISTOR,CARBON FILM, 330 OHM 1/6 W

5%

R1104 0RD1201F609 RESISTOR,CARBON FILM, 1.2K OHM 1/6 W

5%


5%


5%


L20V26 - PARTS

5%


5%

R250 0RD1200H609 RESISTOR,CARBON FILM, 120 OHM 1/2 W

5%

R253 0RD1200H609 RESISTOR,CARBON FILM, 120 OHM 1/2 W

5%

R321 0RN2202F409 RESISTOR,FIXED METAL FILM, 22K OHM 1/

6 W 1.00% TA52

R322 0RN5602F409 RESISTOR,FIXED METAL FILM, 56K OHM 1/

6 W 1.00% TA52

R803 0RHZVTA001A RESISTOR,DRAWING, 0.025 OHM 1W 2%

2512, IRC


2512, IRC


2512, IRC

R932 0RF0561K607 RESISTOR,DRAWING, 5.6 OHM 2 W 5.00%

TA62

RA501 0RRZVTA001A RESISTOR,DRAWING, MNR-14-E0A-J-101

100OHM 5%


100OHM 5%


100OHM 5%


100OHM 5%


100OHM 5%


100OHM 5%

RA507 6210VC0004A FILTER(CIRC),EMC,3216 4S600

TAIYOYUDEN

SJ201 6612VJH008D JACK,RCA, PJ6063D PARKELEC DVD

SW1101 140-313A

100G(TA)

SWITCH,TACT, TACT 2LEAD

SW1101

SW1102

6600VM1001A SWITCH,PUSH, SDKLA1

ALPS UL/CSA 250V 5A

140-313A

100G(TA)


SW1103 SWITCH,TACT, TACT 2LEAD

SW1104

SW1105

SW1106

140-313A

100G(TA)

140-313A

100G(TA)

140-313A

100G(TA)

140-313A

100G(TA)




SW1107 140-313A

100G(TA)


SY302 6200VKR001B FILTER(CIRC),BAND PASS, LPF 2EA SMD

TH355LSK-K5214

SY525 6210VC0004A FILTER(CIRC),EMC,3216 4S600

TAIYOYUDEN


TAIYOYUDEN


TAIYOYUDEN


TAIYOYUDEN

T801 6170VTCA30A TRANSFORMER,CONV.[COIL], EPC 13-Z

320UH DC-DC CONV. SI-786 (NF-99LA)

TU301 6700VNF019C TUNER, TAFC-H101P LG PRECISION CO., LTD

PARTS

X1

X1

X301

156-A01L

156-A01L

156-A02X

NTSC PHONO 45.75M

RESONATOR,CRYSTAL, HC49U 6.000MHZ

30PPM 16PF


30PPM 16PF


25PPM 20PF

X302 6202VDB007B RESONATOR,CRYSTAL, HC49U 20.250MHZ

30PPM 16PF

X501 6202VDT002B RESONATOR,CRYSTAL, SX-1SMD 14.318MHZ

30PPM 16PF TP

X601 6202VDT002B RESONATOR,CRYSTAL, SX-1SMD 14.318MHZ

30PPM 16PF TP

X90 166-E02F RESONATOR,CERAMIC, CSB500F9 MURATA

500KHZ .

X901 156-A02M RESONATOR,CRYSTAL, HC49U KJE RADIAL

18.432MHZ 30PPM 10PF

ZD101 0DZ330009BA DIODE,ZENERS, ZENER HZT33 TAPING

CM154 - 923-03488 17 L20V26 - PARTS

- 18 -

DIAGRAMS

EXPLODED VIEW

DIAGRAMS

8

9

10

11

7

1

2

6

5

3

4

L20V26 Model Parts

No. PART NO.

DESCRIPTION

1 3091V00A20G CABINET ASSY, ZENITH

2 120-D44E SPEAKER G705/080701A MOTORJOY 4OHM

3 6871VSMA75F POWER PCB ASSY

4 5020V00553E BUTTON SET (#39)

5 5020V00552H BUTTON SET

6 6871VSMA74A CTL PCB ASSY

7 6304VT2011A LCD,LC201V1-A1 20.1

8 6633VA0003D INVERTER ASSY, 15VOLT KUBNKM022A

9 6871VSM814B MX PCB ASSY

10 6871VMM644L MAIN PCB ASSY

11 6871VSM812B TUNER PCB ASSY

12 3809V00A10J BACK COVER ASSY

13 3550V00202A A/V COVER ABS

14 4950V00081B METAL HINGE FIXER SUS304

15 4811V00019E BRACKET ASSY

CM154 - 923-03488 19

12

13

14

15

L20V26 - DIAGRAMS

BLOCK DIAGRAM

DIAGRAMS

DA L/S SC

DA L/S SC

CM154 - 923-03488 20 L20V26 - DIAGRAMS

MAIN PCB LAYOUT

PCB LAYOUTS

CM154 - 923-03488 21 L20V26 - PCBS

MX PCB LAYOUT

PCB LAYOUTS

CM154 - 923-03488 22 L20V26 - PCBS

TUNER PCB LAYOUT

PCB LAYOUTS

TUNER(TOP)

CONTROL PANEL PCB LAYOUT

TUNER(BOTTOM)

POWER

CONTROL

CM154 - 923-03488 23 L20V26 - PCBS

- 24 -

F

E

G

1

D

C

B

A

2 3 4 5

Main L20V26 Circuit

6 7 8 9 10

CM154 - 923-03488

CRITICAL SAFETY COMPONENTS ARE IDENTIFIED BY THE SYMBOL .

REPLACE ONLY WITH PART NUMBERS SPECIFIED.

25 NOTE: WAVEFORMS AND VOLTAGES WERE MEASURED AT 120VAC,

CHANNEL 5, AND NSTC COLOR BARS.

L20V26 SHEET 25

Zenith L20V26 Service manual

SERVICE MANUAL

Product Type: LCD TV

Chassis: MF-002A

Manual Series: CM154

Manual Part #: 923-03488

Model Line: E

Product Year: 2002

Model Series:

CONTENTS

Published June 2002 by Technical Publications

Zenith Electronics Corporation

201 James Record Road

Huntsville, Alabama 35824-1513

PRODUCT SAFETY

PRODUCT SAFETY

GENERAL INFO

WARRANTY/SERVICE

USER MENUS

SERVICING

PARTS

DIAGRAMS

TUNER(TOP)

TUNER(BOTTOM)

POWER

CONTROL

Main L20V26 Circuit

Related manuals

Table of contents

Zenith L20V26 Service manual

SERVICE MANUAL

Product Type: LCD TV

Chassis: MF-002A

Manual Series: CM154

Manual Part #: 923-03488

Model Line: E

Product Year: 2002

Model Series:

CONTENTS

Published June 2002 by Technical Publications

Zenith Electronics Corporation

201 James Record Road

Huntsville, Alabama 35824-1513

PRODUCT SAFETY

PRODUCT SAFETY

GENERAL INFO

WARRANTY/SERVICE

USER MENUS

SERVICING

PARTS

DIAGRAMS

TUNER(TOP)

TUNER(BOTTOM)

POWER

CONTROL

Main L20V26 Circuit

Related manuals

Zenith

L15V26D

Zenith

L15V26C

Zenith

L20V26C Series

LG

RP-20LA30

Zenith

L20V26C Series

Zenith

L13V36

Zenith

L13V36

KTV Global

BRFLT104AA

Zenith

L15V26

Zenith

L20V26 Seroes

Table of contents