Haier HLTDC19, HLTDC15, HLC19E, L19A18-C, NS-CL19C Service Manual

SERVICE MANUAL

FOR HLTDC19

TFT-LCD TV

Content

CONTENTS -----------------------------------------------------------------------------------------------1
Main Unit Description----------------------------------------------------------------------------------2
Features----------------------------------------------------------------------------------------------------4
Warning and Cautions---------------------------------------------------------------------------------6
Replacement of Memory IC--------------------------------------------------------------------------8
Net Dimension-------------------------------------------------------------------------------------------9
Remote Controller Functions----------------------------------------------------------------------10
ICs function description ----------------------------------------------------------------------------13
Block Diagram------------------------------------------------------------------------------------------21

Trouble Shooting---------------------------------------------------------------------------------------26

Front Panel Controls

Control Panel Function

TV/AV MENU VOL- VOL+ CH- CH+ POWER

2 3 4 5

1. Power supply switch

2.TV/AV PC/COMPONENT/AV/SV/TV/DVD

3. MENU Press to select the main menu

4. VOL- Volume down / Left orientation to adjust the item in the OSD
VOL+ Volume up / Right orientation to adjust the item/Press to enter

5. CH- TV channel down / to select the item in the menu
CH+ TV channel up / to select the item in the menu

6. Power indicator
Illuminates red in standby mode, illuminates green when the display is
turned on

7.Remote Sensor

Selects the input signals:

Receives the signals from the remote control

1

6

7

Connection Options

The above figure is for reference only,
connections may differ depending upon
the models

DVD

STOP PLAY/PAUSE OPEN/CLOSE

PREW NEXT

DVD insert

VGA Input

Connect to the VGA
15PIN analog output
connector of a PC
display card to use set
as a PC display

DVD/DTV Input

Connect a component
video/audiodevice to
these jacks

Video Input

Connect video output
from an external
device to this jack

AV/S-VIDEO/
COMPONENT Audio
Input

Connect audio output
from an external device
to these jacks

PC Audio Input

Connect the audio
output from the pc
to the audio input port

Earphone port

Antenna Input

Connect cable or
antenna signals to
the TV, either direc­tly or through your
cable box.

S-Video Input

Connect S-Video out
from an S-Video device
to the jacks.

ANT IN

S-VIDEO

VGA IN

PC AUDIO IN

AUDIO IN

R

L

VIDEO IN

V

Pb

Pr Y

COMPONENT IN

ANT IN

S-VIDEO

VGA IN

PC AUDIO IN

AUDIO IN

R

L

VIDEO IN

V

Pb

Pr Y

COMPONENT IN

Features

Model

NO.

Functions

HLTDC19

1

TFT SAMSUNG

2

Screen size 19inch

3

Aspect ratio 4:3

4

Resolution 1280×1024

5

Brightness 300cd/m

2

6

Contrast(Darkroom) 700:1

7

Response time(ms) 8

8

Color system NTSC

9

NO. of preset channels 181

10

Picture mode Yes

11

Angel of view H:150°/ V:135°

12

Color display 16,777,216

13

Color level 16

14

OSD languages ENGLISH,FRENCH, SPANISH

15

AV stereo Yes

16

Surrounding sound No

17

Audio system M

18

Bass Yes

19

Balance Yes

20

Sound mode Yes

21

Mute Yes

22

BTSC Yes

23

AV input Yes

24

AV output No

25

Y CB CR Yes

26

Y PB PR Yes

27

S-video jack Yes

28

TV in Yes

Model

NO.

Functions

HLTDC19

29

D-SUB jack Yes

30

DVI socket

No

31

SCART socket

No

32

Ear-Phone Out

Yes

33

CCD,V-CHIP

Yes

34

Semitransparent menu

Yes

35

ZOOM

No

36

16:9 mode

No

37

Child Lock

Yes

38

Quick View

Yes

39

NO. of built-in speakers

2

40

Audio output power(Built-in)(W)

2*1.5

41

Total power input（W）

80

42

Voltage range（V）

120

43

Power frequency（Hz）

60

44

Time of sleep timer(MINS)

240

45

Approval

UL

46

Suitable market

U.S.

Warnings and Cautions

Warning

High voltages are used in the operation of this product.
Do not romove the cabinet back from your set. Refer
servicing to qualified service personnel.

Warning

To prevent fire or electrical shock hazard, Do not expose
the main unit to rain or moisture.

Warning

Do not drop or push objects into the television cabinet
slots or openings. Never spill any kind of liquid on the
television receiver.

Caution

If the television is to be built into a
compartment or similarly enclosed, the
minimum distances must be maintained.
Heat build-up can reduce the service life of
your television, and can also be dangerous.

!

Minimum
10c

20c

10c

5cm

Caution

Never stand on, lean on, push suddenly the product or its
stand. You should pay special attention to children to children.

Caution

Do not place the main unit on an unstable cart stand, shelf or
table. Serious injury to an individual, and damage to the
television, may result if it should fall.

Caution

When the product is not used for an extended period of time, it

is advisable to disconnect the AC power cord from the AC

outlet.

Caution

Avoid exposing the main unit to direct sunlight and other
source of the heat. Do not stand the television receiver
directly on other produces which give off heat. E. g. video
cassette players,Audio amplifiers. Do not block the
ventilation holes in the back cover. Ventilation is essential to
prevent failure of electrical component. Do not squash power
supply cord under the main unit.

Caution

The LCD panel used in this product is made of glass.
Therefore, it can break when the product is droppe d or
applied with impact. Be careful not to be injured by
broken glass pieces in case the LCD panel breaks.

!

!

!

!

!

REPLACEMENT OF MEMORY IC

1. MEMORY IC

This LCD TV uses memory IC. In the memory IC are memorized data for correctly operating the video and
sound circuits. When replacing memory IC, be sure to use IC written with the initial value of data.

2.CHECK MEMORY IC
(1) Power off

Unplug the ~120V power plug from ~120V power socket.

(2) Replace IC

Be sure to use memory IC written with the initial data values or blank memory IC.

(3) Power On

Plug the ~120V power plug into ~120V power socket. (If memory IC is blank, the program will take 25s to
initial memory IC.

(4) Check and set SYSTEM default value:

1) Press “DISPLAY” key, then press key “CCD”,"MTS/SAP”,"CCD”,"DISPLAY” on the Remote control
unit continuously for factory used.

2) The “Factory mode” will be displayed on the screen,

3) Check the setting value of the SYSTEM default value of Table below. If the vale is different, select
items by [CH-]&[CH+] keys and set value by [VOL-]&[VOL+] keys.

4) Press “EXIT” key and return to the normal screen.

Remote Control Key Functions

When using the remote control, aim it
towards the remote sensor on the TV

Stand By

DVD Open/close

Scan

TV/DVD

Mute

Call Screen Display

Program Number

TV Sleep button

Volume/Channel Selection

MENU

DVD 10+

DVD STOP

DVD SUBTITLE

DVD SETUP

DVD PAUSE/STEP

DVD FAST REVERSE

DVD FAST FORWARD

DVD MENU

DVD NEXT

DVD PREVIOUS

DVD REPEAT

DVD PLAY/ENTER

DVD A-B REPEAT

DVD Cursor Move button

DVD SLOW

DVD ANGLE

DVD SEARCH

DVD TITLE/PBC

DVD PROGRAM

DVD CALL

TV/AV and input selection

Return to Previous Channel

CCD ( closed caption) On / Off

Adjust Picture Mode

Exit On Screen Display

Mode

Zoom Function

Select MONO,STEREO, SAP in NTSC system

DVD AUDIO

Buttons on the remote control

UP

DOWN

LEFT

RIGHT

POWER TV/DVD

OPEN/CLOSE

SCAN RECALL

DISPLAY

MUTE

1 2 3 4

5 6 7 8

99 00

CCD

P.STD

CH+

CH-

VOL

-

VOL
+

MENU

EXIT 10+

STOP

SETUP

PAUSE/STEP

REV FWD . PREV NEXT

D.MENU

REPEAT

A-B

PLAY/ENTER

SLOW

ANGLE

TITLE/PBC

SEARCH

ZOOM

D.CALL

PROGRAM

SUBTITLE

MTS/SAP

TV/AV

SLEEP

AUDIO

Remote Control

Installing Batteries

Remove the battery cover.

Insert two size AA batteries matching
the +/-polarities of the battery to the +/­marks inside the battery compartment.

!

!

Precautions

Make sure that there is no
obstacle between the remote
controller and television set.

As strong light may interfere with the
signals, change your position to
operate the remote control if
the television cannot be turned
on or off as expected.

Keep the remote control
away from heat sources or
humid areas to ensure
effective performance of
the remote.

Make sure that two AA 1.5V alkaline
batteries are loaded. The batteries
must be of the same type, must be
inserted properly, and must not be
rechargeable.

ICs Function Description

1.UOC3

Function：TV signal processor with Teletext and Nicam

PIN SYMBOL DESCRIPTION
1 VSSP2 ground
2 VSSC4 ground
3 VDDC4 Digital supply to SDACs(1.8V)
4 VDDA3(3.3V) Supply(3.3V)
5 VREF_POS_LSL Positive reference voltage SDAC(3.3V)
6 VREF_NEG_LSL+HPL Negative reference voltage SDAC(0V)
7 VREF_POS_LSR+HPR Positive reference voltage SDAC(3.3V)
8 VREF_NEG_HPL+HRP Negative reference voltage SDAC(0V)
9 VREF_POS_HPR Positive reference voltage SDAC(3.3V)
10 XTALIN Crystal oscillator input
11 XTALOUT Crystal oscillator output
12 VSSA1 ground

13 VGUARD/SWIO

V-guard input/I/O switch (e.g.4mA current sinking

capability for direct drive of LEDs)
14 DECDIG Decoupling digital supply
15 VP1 1st supply voltage TV-processor(+5V)
16 PH2LF Phase-2 filter
17 PH1LF Phase-1 filter
18 GND1 Ground 1 for TV-processor
19 SECPLL SECAM OLL decoupling
20 DECBG Bandgap decoupling
21 EWD/AVL East-West drive output or AVL capacitor
22 VDRB Vertical drive B output
23 VDRA Vertical drive A output
24 VIFIN1 IF input 1
25 VIFIN2 IF input 2
26 VSC Vertical sawtooth capacitor
27 IREF Reference current input
28 GNDIF Ground connection for IF amplifier
29 SIFN1/DVBIN1 SIF input 1/ DVB input 1
30 SIFN2/DVBIN2 SIF input 2/ DVB input2
31 AGCOUT Tuner AGC output
32 EHTO EHT/over voltage protection input

33

AVL/SWO/SSIF/REFO/
REFIN

Automatic volume leveling/switch output/sound IF

input sub-carrier reference output/external reference

signal mixer for DVB operation