Haier LT32F6 User manual

32″LCDTV HaierLT32F6
1
Service
Service
Service
Horizontal Frequency
30-65KHz
Table of Contents
Description Page Description Page
SAFETY NOTICE
ANY PERSON ATTEMPTING TO SERVICE THIS CHASSIS MUST FAMILIARIZE HIMSELF WITH THE CHASSIS
AND BE AWARE OF THE NECESSARY SAFETY PRECAUTIONS TO BE USED WHEN SERVICING
ELECTRONIC EQUIPMENT CONTAINING HIGH VOLTAGES.
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING
6.5 LED Board……………………..……..……….....31
7.Adjustment……………….……….………….....….32
7.1 WB Adjustment………...……………..……...….32
7.2 FW Upgrade.………………………………...…..33
7.3 The Writing VGA & HDMI EDID….………....…38
8.Block Diagram.……............................................43
9.Wiring Diagram.……..........................................45
10.Schematic Diagram………..……..……………...46
10.1 Main Board…………….…………………...…...46
10.2 Power Board………..…....…………...………..59
10.3 Key Board……………….………….…………...61
10.4 IR Board……………………………….………...62
10.5 LED Board……………………..……..………....63
Table of Contents.......……....................................…..1
Important Safety Notice.......................................……2
Revision List……………………………………………....3
1.General Specification.................................………..4
2.Operating Instructions…………………….……...…...5
3.Input/Output Specification…………....................….9
4.Mechanical Instructions……………………..............12
5.Repair Flow Chart …………………………………....16
6.PCB Layout …………...………………………………23
6.1 Main Board………..…………………...……….…..23
6.2 Power Board……..…………..………….…..……..27
6.3 Key Board………………………..……..…………...30
6.4 IR Board…………………………..…………….......30

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Important Safety Notice
Proper service and repair is important to the safe, reliable operation of all Haier Company Equipment. The service
procedures recommended by Haier and described in this service manual are effective methods of performing
service operations. Some of these service operations require the use of tools specially designed for the purpose.
The special tools should be used when and as recommended.
It is important to note that this manual contains various CAUTIONS and NOTICES which should be carefully read in
order to minimize the risk of personal injury to service personnel. The possibility exists that improper service
methods may damage the equipment. It is also important to understand that these CAUTIONS and NOTICES ARE
NOT EXHAUSTIVE. Haier could not possibly know, evaluate and advise the service trade of all conceivable ways in
which service might be done or of the possible hazardous consequences of each way. Consequently, Haier has not
undertaken any such broad evaluation. Accordingly, a servicer who uses a service procedure or tool which is not
recommended by Haier must first satisfy himself thoroughly that neither his safety nor the safe operation of the
equipment will be jeopardized by the service method selected.
Hereafter throughout this manual, Haier Company will be referred to as Haier.
WARNING
Use of substitute replacement parts, which do not have the same, specified safety characteristics might create
shock, fire, or other hazards.
Under no circumstances should the original design be modified or altered without written permission from Haier.
Haier assumes no liability, express or implied, arising out of any unauthorized modification of design.
Servicer assumes all liability.
FOR PRODUCTS CONTAINING LASER:
DANGER-Invisible laser radiations when open AVOID DIRECT EXPOSURE TO BEAM.
CAUTION-Use of controls or adjustments or performance of procedures other than those specified herein may
result in hazardous radiation exposure.
CAUTION -The use of optical instruments with this product will increase eye hazard.
TO ENSURE THE CONTINUED RELIABILITY OF THIS PRODUCT, USE ONLY ORIGINAL MANUFACTURER'S
REPLACEMENT PARTS, WHICH ARE LISTED WITH THEIR PART NUMBERS IN THE PARTS LIST SECTION OF
THIS SERVICE MANUAL.
Take care during handling the LCD module with backlight unit
-Must mount the module using mounting holes arranged in four corners.
-Do not press on the panel, edge of the frame strongly or electric shock as this will result in damage to the screen.
-Do not scratch or press on the panel with any sharp objects, such as pencil or pen as this may result in damage to
the panel.
-Protect the module from the ESD as it may damage the electronic circuit (C-MOS).
-Make certain that treatment person’s body is grounded through wristband.
-Do not leave the module in high temperature and in areas of high humidity for a long time.
-Avoid contact with water as it may a short circuit within the module.
-If the surface of panel becomes dirty, please wipe it off with a soft material. (Cleaning with a dirty or rough cloth may
damage the panel.)

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Revision List
Version Release Date Revision Instructions Model
A00 Mar.24,2011 Initial release E32AG2NBWNH62N

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1. General Specification
Model No. LT32F6
DISPLAY
Aspect Ratio 16:9
Resolution 1366 x 768
ENHANCEMENT
Sound Output (RMS Watts) 2 x 10 W
Sound Mode Speech, Personal, Music
Picture Formats Auto, Normal, Wide, Zoom 1, Zoom 2, Native (only in HDMI mode)
Picture Mode Standard, Vivid, Movie, Eco, Personal
CONNECTIONS
Rear Connectors
Tuner input (75Ω)
SCART 1, SCART 2
PC IN: VGA and Audio cable
Component Video and L/R Audio input
SPDIF Output (Coaxial audio out)
HDMI 1, HDMI 2
SERVICE
Side Connectors
Earphone Output
AV In (Composite Audio / Video)
HDMI 3
USB
CI Slot (Common Interface)
WEIGHT & DIMENSION
Dimension with stand
(WxHxD) (mm) 789.08x566.53x230.17
Dimension without stand
(WxHxD) (mm) 789.08x509.83x95
Weight with stand 9.5 Kg
Weight without stand 7.7 Kg
POWER
Operation (Max.) 130 W
Standby < 1 W
Mains Power AC220-240V, 50-60Hz
Accessories
User Manual
Quick Setup Guide
Remote Control with Batteries
Mains Cord
Warranty Card

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2. Operating Instructions
Pls refer to the user manual attached in the service manual.

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Hotel Mode(Option)
Starting and Existing◎
1. Starting the Hotel Menu
Press the “menu” key and the number key “XXXXXX” to enter hotel mode.
“XXXXXX” is the password request by Customer (6 numbers).
************ HAIER password is Menu + 100108 *************
2. Starting the hotel mode
If you want to turn on the hotel mode, please press the“>”key or the“<”key on the remote control to set the hotel
mode on！
3. Exiting “Hotel Menu”
Select the “EXECUTE”item in Hotel Menu to execute and exit the hotel menu. If both of the remote control and touch
key pad button are locked, please press “Menu” key on the TV for 5 seconds to unlock.
Setting items◎
1) Power ON fixed [POWER ON FIXED]
Option “VARIABLE”,“FIXED_ALL”,“FIXED_BODYKEY”or“RC RESPOND”
Default “VARIABLE”
Function
・“VARIABLE”is enable the “POWER” key on the touch keypad and the
remote control.
・“FIXED_ALL”is disable the “POWER” key on the touch keypad and the
remote control when you want to use keypad to power off.
・“FIXED_BODYKEY”is only disable the “POWER” key on the touch
keypad when you want to use keypad to power off.
・“RC RESPOND”is same as the “VARIABLE”.
Remarks
2) Volume maximum level [MAXIMUM VOLUME]
Option 0~60
Default VARIABLE
Function The volume cannot be increased more than the value which you set.
Remarks
・If you set a maximum volume value, the volume bar will not display
when you press the VOL +/- key on the remote control until the value
reach the maximum value.
・The volume of the headphones or monitor output is limited.
・This item will be disabled when the “VOLUME FIXED” item is set to
FIXED.
3) Volume fixed [VOLUME FIXED]
Option “VARIABLE”,“FIXED”,“ACCTRL”or“AC/RCCTRL”
Default “VARIABLE”
Function
・VARIABLE：The volume is not fixed.
・FIXED：The volume is fixed to the value which you set.
・AC CTRL：In the case of AC ON only, the TV starts at the volume
specified in the volume fixed level.
・AC/RC CTRL：The TV starts at the volume specified in the volume
fixed level.
Disabled
key
VOL +/- and mute key will be disabled when set the “VOLUME FIXED”
item to FIXED state.
Remarks ・“FIXED”, the volume bar OSD will not display.
4) Volume fixed level [VOLUME FIXED LEVEL]
Option 0~60
Default 0
Function The volume value will fixed to the value which you set.
Remarks ・If the [VOLUME FIXED] item is “VARIABLE”state , this item will be disabled.

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5) Remote control operation [RC BUTTON]
Option “RESPOND”,“NORESPOND”or“LIMITED”
Default RESPOND
Function
・RESPOND：The remote control is enabled.
・NO RESPOND：The remote control is disabled. The POWER key is also
disabled.
・LIMITED：only (POWER, VOLUME ( / ), CHANNEL ( / ) , ATV,DTV∧∨ ∧∨ ）
key is enabled.
Remarks
6) Touch keypad Operation [PANEL BUTTON]
Option “RESPOND”or“NORESPOND”
Default RESPOND
Function RESPOND：The touch keypad is enabled.
NO RESPOND：The touch keypad is disable except the POWER key
Remarks
7) Menu operation [MENU BUTTON]
Option “RESPOND”or“NORESPOND”
Default RESPOND
Function RESPOND：The “MENU” key is enabled.
NO RESPOND：The “MENU” key is disabled.
Remarks
8) OSD display [ON SCREEN DISPLAY]
Option “YES”,“NO”or“LIMITED”
Default YES
Function
・“YES”, all of the OSD will display.
・“NO”, all of the OSD will not display.
・“LIMITED”, only a little of OSD will display.
Disabled
key
・“NO”：（aspect、Sleep Timer、Menu、EPG、Freeze）OSD will be disable
to display.
・“LIMITED”：only the (POWER, VOLUME ( /∧∨), CHANNEL
( / ) ,Mute, ATV,DTV∧∨ ，Text）OSD are enabled to display.
(In Text、text, subtitle, subpage, Reveal hidden Teletext, Top/Bottom/Full,
hold、Mute、color is also enable.)
Remarks
9) Start mode [INPUT MODE START]
Option “NORMAL” or “Input source”
Default NORMAL
Function Select the input source when power on.
Remarks
For Example:
“TVA(2)”,“TVD(002TV)”, “AV”, “YPBPR”, “SCART2”, “PC”, “HDMI1”,
“HDMI2”, “HDMI3”, “YPBPR”
TV channel will auto detect the current channel as the input power on source.
If you want to power on at DTV channel 001, you must change the channel to
001 first, then enter hotel mode and set the “INPUT MODE START “item to
TVD (1TV).

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10) Input fixed [INPUT MODE FIXED]
Option “VARIABLE”“FIXED”,“AC CTRL”or“AC/RC CTRL”
Default VARIABLE
Function
1. “VARIABLE”: The input source can be changed when power on.
2. “FIXED”: The input source will be changed to the “INPUT MODE START”
setting value when power on.
3. “AC CTRL”: The input source will be changed to the“INPUT MODE
START”setting value when AC-ON.
4. “AC/RC CTRL”: Same as “FIXED” function.
Remarks
11) Hotel mode setting [HOTEL MODE]
Option RESET
Default
Function Reset to the default value in hotel menu.
Remarks Press “OK” key on the remote control to do reset function.
11) Hotel mode setting [HOTEL MODE]
Option “OFF”or“ON”(loop enabled)
Default OFF
Function OFF：HOTEL MODE is disabled
ON：HOTEL MODE is enabled.
Remarks To active hotel mode.
12) TV TO USB
Option Press
Default
Function Press the“>”key to do TV TO USB function, it will clone this TV set is setting
and channel data to USB disk. When finish clone, it will display Done.
Remarks USB flash disk will have two files like “eepdata.bin” and “chdata.bin” when
finish clone.
13) USB TO TV
Option Press
Default
Function Press the“>”key to do USB TO TV function, it will clone USB disk is setting
and channel data to TV set. When finish clone, it will display Done.
Remarks USB flash disk must have two files like “eepdata.bin” and “chdata.bin” in root
directory.

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3. Input/Output Specification
3.1 Input Signal Connector
D-SUB
Pin No. Description Pin No. Description
1 Red 9 +5V (supply from PC)
2 Green 10 Sync GND
3 Blue 11 NC
4 NC 12 Bi-directional data (SDA)
5 GND 13 H-Sync
6 Red GND 14 V-sync (vclk)
7 Green GND 15 Data clock (SCL)
8 Blue GND
HDMI
Pin No. Description Pin No. Description
1 TMDS Data2+ 11 TMDS Clock Shield
2 TMDS Data2 shield 12 TMDS Clock-
3 TDMS Data2- 13 CEC
4 TMDS Data1+ 14 Reserved (N.C. on device)
5 TMDS Data1 shield 15 SCL
6 TMDS Data1- 16 SDA
7 TMDS Data0+ 17 DDC/CEC Ground
8 TMDS Data0 shield 18 +5V Power
9 TMDS Data0- 19 Hot Plug Detect
10 TMDS Clock+
Full Scart
Pin No. Signal Pin No. Signal
1 Audio output B ( right ) 12 Comms data 1
2 Audio input B ( right ) 13 Ground ( red )
3 Audio output A ( left ) 14 Ground ( blanking )
4 Ground (audio ) 15 Red input or Chroma
5 Ground ( blue ) 16 RGB switching control
6 Audio input A ( left ) 17 Ground ( video input & output )
7 Blue input 18 Ground ( RGB switching control )
8 Function select 19 Video output ( composite )
9 Ground ( green ) 20 Sync or Video input ( composite or Y )
10 Comms data 2 21 Shield (Ground)
11 Green input

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Half Scart
3.2 Input Signal Timing
RGB
Item H.Freq. (KHz) Mode Resolution V.Freq. (Hz)
1 31.469 IBM VGA 12H 640x480 59.940
2 35.156 VESA 800x600 56.250
3 37.879 VESA 800x600 60.317
4 48.363 VESA 1024x768 60.004
5 44.772 1280x720 59.855
6 47.776 CVT 2.3MA 1280 x768 60
7 47.7 VESA 1360x768 60
8 63.981 VESA 1280x1024 60.020
9 66.587 VESA reduced blanking mode 1920x1080 60.0
Pin No. Signal Pin No. Signal
1 Audio output B ( right ) 12 Comms data 1
2 Audio input B ( right ) 13 Ground
3 Audio output A ( left ) 14 Ground ( blanking )
4 Ground (audio ) 15 Chorma input
5 Ground 16 ---
6 Audio input A ( left ) 17 Ground ( video input & output )
7 --- 18 Ground
8 Function select 19 Video output ( composite )
9 Ground 20 Video input ( composite or Y)
10 Comms data 2 21 Common ground ( shield )
11 ---

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HDMI
Item 1920X1080P
50Hz
1920X1080P
25Hz
1920X1080i
50Hz
1280X720P
50Hz
720X576P
50Hz
720X576i
50Hz
Pixel rate 148.5MHz
(6.734 ns)
74.25MHz
(13.468 ns)
74.25MHz
( 13.468ns )
74.25MHz
(13.468 ns)
27 MHz
(37.037 ns)
13.5MHz
( 74.074 ns )
Horizontal
Frequency 56.25 KHz 28.125 KHz 28.125 KHz 37.5 KHz 31.25 KHz 15.625 KHz
Active 1920 pixels
(12.929 us)
1920 pixels
(25.859 us)
1920 pixels
(25.859 us)
1280 pixels
(17.239 us)
720 pixels
(26.667 us)
720 pixels
(53.333 us)
Blank 720 pixels
(4.848 us)
720 pixels
(9.697 us)
720 pixels
( 9.697 us )
700 pixels
(9.428 us)
144 pixels
(5.333 us)
144 pixels
( 10.667 us )
Period 2640 pixels
(17.778 us)
2640 pixels
(35.556 us)
2640 pixels
( 35.556 us )
1980 pixels
(26.667 us)
864 pixels
(42.000 us)
864 pixels
( 64.00 us )
Pulse delay 528 pixels
(3.556 us)
528 pixels
(7.111 us)
528 pixels
(7.111 us )
440 pixels
(5.926 us)
12 pixels
(0.444 us)
12 pixels
( 0.889 us )
Pulse width 44 pixels
(0.296 us)
44 pixels
(0.593 us)
44 pixels
( 0.593 us )
40 pixels
(0.539 us)
64 pixels
(2.370 us)
63 pixels
( 4.667 us )
Vertical
Frequency 50 Hz 25 Hz 50 Hz 50 Hz 50 Hz 50 Hz
Active 1080 lines
(19.2 ms)
1080 lines
(38.4 ms)
1080 lines
( 38.4 ms )
720 lines
(19.2 ms)
576 lines
(18.442 ms)
576 lines
( 36.864 ms )
Blank 45 lines
(0.8 ms)
45 lines
(1.6 ms)
45 lines
(1.6 ms )
30 lines
(0.8 ms)
49 lines
(1.568 ms )
49 lines
(3.136 ms )
Period 1125 lines
(20 ms)
1125 lines
(40 ms)
1125 lines
( 40 ms )
750 lines
(20 ms)
625 lines
(20.000 ms)
625 lines
( 40 ms )
Pulse delay 4 lines
(0.071 ms)
4 lines
(0.142 ms)
2 lines
( 0.071 ms )
5 lines
(0.133 ms )
5 lines
(0.160 ms)
2 lines
( 0.128 ms )
Pulse width 5 lines
(0.089 ms)
5 lines
(0.178 ms)
5 lines
(0.178 ms )
5 lines
(0.133 ms)
5 lines
(0.160 ms)
3 lines
(0.192 ms )
Scan Progressive Progressive Interlace Progressive Progressive Interlace
Sync type ACS / HDTV
w/serr & eq
ACS / HDTV
w/serr & eq ACS ACS
Video kind
Analog
YPbPr
(ITU-R
BT.709)
Analog
YPbPr
(ITU-R
BT.709)
Analog
YPbPr
(SMPTE
RP177)
Analog
YPbPr
(SMPTE
RP177)

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4. Mechanical Instructions
Front View Back View
Step1. Remove the STAND and BASE.
Step2. Remove the REAR COVER.

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Step3. a. Disconnect all the WIRES/CON;
b. Remove MAIN and POWER BOARD.
c. Remove the main board SIDE BKT.
Step4. Remove the BKT P_BD.
BKT P_BD

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Step5. Remove the BOLT and SCREW-STOPPER.
Step6. Remove the DECO LENS3.
Bolt
SCREW-
STOPPER

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Step7. Separate the BEZELand PANEL.

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5. Repair Flow Chart
1. No power
No power (LED “Off”)
Check the AC input and
the
p
ower is “ON”? Power “On”
Check the IR board and LED
Replace the IR board
Replace the main board
Power board output=5V? Replace the power board
No
Yes
No
Yes
No

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2. Can’t start
Can’t start (LED red)
Replace the main board
Replace the Power board
No
Yes
No
Yes
No
No
Power board output＝24V?
Check the power key is under control?
Check the IR receiver is normal?
Replace the power board
Replace the key board
Yes
Replace the IR board

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3. Abnormal Display
Abnormal Display
Reset the source
Check the source
Check the panel
Replace the main board
Replace the LVDS cable
Replace the panel
No
No
No
Yes
Yes
Yes
No
No
Check the main board
Enter factory mode to do
“EEPROM initial”&“Reset”
Check the LVDS cable

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4. No display
Check the B/L
signal is available?
Replace main board
Replace the power board
Panel Vcc = 12V?
Replace the Panel
No display (LED white)
Replace the main board
Check the backlight is
“On”?
Check the LVDS cable
Reinsert or replace the
LVDS cable
Replace the main board
Replace the Panel
No
Yes
Yes No
Yes
No
No
Yes
Yes
No
Yes
No
Power board output＝24V?
Check TV is under control and power
on/off by remote control and power key?

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5. Sound problem
No
Check the cable between the
speakers and main board is OK?
No sound or sound abnormal
Check the TV is muted, adjust the
volume or enter the menu to reset?
Reinsert the audio cable or
change the TV system
Replace the cable
Replace the speaker
Replace the main board
No
Yes
Check the speaker resistance value is in spec
(Remark: The value is marked on the speaker)?
Check the audio source connection
and the TV system are correct?
Yes
No
Yes
No
Enter factory mode to do “Reset”
No