Haier 15HL25S - 15" LCD TV User manual

SERVICE MENUAL
FOR 15HL25S
TFT-LCD TV
Haier Group
TV-8888-70

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

Control Panel Function
1.TV/AV PC/COMPONENT/AV/SV/TV
2. MENU Press to select the main menu
3. VOL-(V-) Volume down / Left orientation to adjust the item in the OSD
VOL+ (V+) Volume up / Right orientation to adjust the item/Press to enter
4. CH-(P-) TV channel down / to select the item in the menu
CH+(P+) TV channel up / to select the item in the menu
5. Power supply switch
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
TV/AV MENU VOL- VOL+ CH- CH+ POWER
12345
67
23145
2314
67
567
HLH15BB
HLE20BB
15HL25S/20AL25S
Main Unit Description

AV /S-VIDEO/COMPONENT Audio Input
Connect audio
output from an external
device to these jacks
D-SUB Input
Connect to the VGA
15PIN analog output
connector of the PC
display card for PC
display purpose
S-Video Input
Connect S-Video out
from an S-Video device
to the jacks.
Antenna Input
Connect cable or
antenna signals to
the TV, either direc-
tly or through your
cable box.
Connection Options
Earphone port
PC Audio Input
Connect the PC output
connector from a PC to
the audio input port
(The figure is just for referrence, please see actual unit. )
DVD/DTV Input
Connect a component
device to these jacks
ANT IN
S-VIDEO
D-SUB IN PC AUDIO IN AUDIO IN
R
L
VIDEO IN
V
Pb PrY
COMPONENT IN
Video Input
Connect video
output from an external
device to this jack
DC IN
DC Power Cord Socket
This TV operates on DC
power. The voltage is
indicated on the specifications
page. Never attempt to
operate the TV on ac power

Features
Model
NO. Functions
15HL25S
1 TFT SVA
2 Screen size 15inch
3 Aspect ratio 4:3
4 Resolution 1024×768
5 Brightness 250cd/m2
6 Contrast(Darkroom) 400:1
7 Response time(ms) 16
8 Color system NTSC
9 NO. of preset channels 100
10 Picture mode Yes
11 Angel of view H:120°/ V:100°
12 Color display 16,777,216
13 Color level 16
14 OSD languages ENGLISH,FANCE, SPAISH
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 NO
28 TV in Yes

Model
NO. Functions
15HL25S
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
NO
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）
40
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 dropped 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. PROCEDURE FOR REPLACING MEMORY IC
(1) Power off
Unplug the +12V power plug from +12V 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 +12V power plug into +12V 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 colour key “red”,”green”,yellow”,”DISPLAY” on the Remote control
unit continuously for factory used.
2)The “Factory2” 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 “OK” 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
2. Power supply switch
9. MENU
To display/exit the main menu
11. CH+/CH-
TV channel up/down or select the item of the menu
12. VOL+
Volume up / to select the main menu/ to adjust the item/ to
enter the submenu.
VOL- Volume down / to select the main menu/ to adjust the item
6. 0-9 TV channel number select
3. RECALL
Quick TV channel switch(return to the last channel)
10. TV/AV Select PC/COMPONENT/AV/SV/TV
7. MTS/SAP Select MONO,STEREO, SAP in NTSC system
1. MUTE MUTE
8. P.STD Select picture mode: PERSONAL/STANDARD/MILD/FRESH
5. DISPLAY Display current input signal information
4. EXIT Menu exit
Illustration of the keys on the remote control:
MUTE
RECALL DISPLAY EXIT
123
456
789
MTS/SAP P.STD
MENU TV/AV
CH+
CH-
VOL
-
VOL
+
CCD SLEEP SCAN
0
12
34
5
6
78
910
11
12
13 14
15
13. CCD
Closed caption on/off
14. SCAN
Channel scan
15. SLEEP
TV sleep button