Haier LY19Z6 User manual

18.5″&23.6″LEDTV HaierLY19Z6&LYF24Z6
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Service
Service
Service
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
6.1 Main Board………..…………………...…….….......24
6.2 Power Board…..…………..………….…..…….......28
6.3 Key Board………………………..……..……….......30
6.4 IR Board…………………………..……….…….......31
7. Adjustment/FW Upgrade/EDID……………...………32
8. Block Diagram..….…...............................................43
9. Wiring Diagram.……...............................................44
10. Schematic Diagram……….……..………………....47
10.1 Main Board…………….…………………...….......47
10.2 Power Board………..…....…………...………......61
10.3 Key Board……………….………….………….......63
10.4 IR Board……………………………….……….......65
Table of Contents..........……...........................................1
Important Safety Notice............................................…...2
Revision List………………………………………..…….…3
1. General Specification...................................……........4
2. Operating Instructions…………………….……..…......5
2.1 The Use of Remote Control…..….…………...……....5
2.2 To Use the Menus…...…..……………….….…..….....5
2.3 Front Panel Control Knobs…...…………….…..….....5
2.4 How to Connect……...…………………….…….….....5
3. Input/Output Specification…...………..........................6
4. Mechanical Instructions…..…………………................9
5. Repair Flow Chart..……………………………….……17
6. PCB Layout.........………...…………………….……...24

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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 Customer Model Model
A00 Sep.16,2010 Initial release
LY19Z6 E19A22NBWNH72N
LYF24Z6
E24A62NBWNH72N
A01 Nov.18,2010 Add the new model E24A62NRWNH6NN
A02 May.9,2011
Add new power board
715G4820P02000004S
Update are as below:
Repair Flow Chart
PCB Layout
Wiring Diagram
Schematic Diagram
E24A62NBWNH92N
E24A62NRWNH9NN

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1. General Specification
Model No. LY19Z6 LYF24Z6
DISPLAY
Aspect Ratio 16:9 16:9
Resolution 1366 x 768 1920 x 1080
ENHANCEMENTE
Sound Output (RMS Watts) 2 x 3 W 2 x 3 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
PC IN: VGA and Audio Cable
Component Video and L/R Audio Input
SPDIF Output (Coaxial audio Out)
HDMI 1
AV OUT
SERVICE
Side Connectors
Earphone Output
AV In(CompositeAudio/Video)
HDMI 2
USB
CI Slot (Common Interface)
WEIGHT & DIMENSIOIN
Dimension with stand
(WxHxD) (mm) 469.4 x 353.5 x 150 581.24 x 416.7 x 160
Dimension without stand
(WxHxD) (mm) 469.4 x 313.7 x 55.7 581.24 x 416.7 x 53
Weight with stand 4.0 Kg 4.8 Kg
Weight without stand 3.7 Kg 4.5 Kg
POWER
Operation (Max.) < 40 W < 50 W
Standby < 0.5 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
For this chapter, pls refer to the user manual attached with this service manual.

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3. Input/Output Specification
3.1 Input Signal Connector
VGA
Pin No. Signal
1 Red
2 Green
3 Blue
4 UART-TX
5 GND
6 Red GND
7 Green GND
8 Blue GND
9 +5V (supply from PC)
10 Sync GND
11 UART-RX
12 Bi-directional data (SDA)
13 H-sync
14 V-sync (vclk)
15 Data clock (SCL)
HDMI
Pin No. Signal
1 TMDS Data2+
2 TMDS Data2 shield
3 TDMS Data2-
4 TMDS Data1+
5 TMDS Data1 shield
6 TMDS Data1-
7 TMDS Data0+
8 TMDS Data0 shield
9 TMDS Data0-
10 TMDS Clock+
11 TMDS Clock Shield
12 TMDS Clock-
13 CEC
14 Reserved (N.C. on device)
15 SCL
16 SDA
17 DDC/CEC Ground
18 +5V Power
19 Hot Plug Detect

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Full SCART
Pin No. Signal
1 Audio output B (right)
2 Audio input B (right)
3 Audio output A (left)
4 Ground (audio)
5 Ground (blue)
6 Audio input A (left)
7 Blue input
8 Function select
9 Ground (green)
10 Comms data 2
11 Green input
12 Comms data 1
13 Ground (red)
14 Ground (blanking)
15 Red input or Chroma
16 RGB switching control
17 Ground (video input & output)
18 Ground (RGB switching control)
19 Video output (composite)
20 Sync or Video input (composite or Y)
21 Shield (ground)

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3.2 Input Signal Mode
Video input format
Physical Inputs Format
PAL from RF 720 x 576 @50i
SECAM from RF 720 x 576 @50i
Side, SCART (CVBS,RGB and Y/C) 720 x 576 @50i
720 x 480 @60i
Component
720 x 480 @60i
720 x 480 @60p
720 x 576 @50i
720 x 576 @50p
1280 x 720 @60p
1280 x 720 @50p
1920 x 1080 @60i
1920 x 1080 @50i
HDMI
720 x 480 @60i
720 x 480 @60p
720 x 576 @50i
720 x 576 @50p
1280 x 720 @50p
1280 x 720 @60p
1920 x 1080 @50i
1920 x 1080 @60i
1920 x 1080 @25p
1920 x 1080 @30p
640 x 480 @60Hz
800 x 600 @60Hz
1024 x 768 @60Hz
1360 x 768 @60Hz
PC Input signal mode
Dot rate (MHz) H.freq (KHz) Mode Resolution V.freq (Hz)
1 25.175 31.469 IBM VGA 640 * 480 59.940
2 36.000 35.156 VESA 800 * 600 56.250
3 40.000 37.879 VESA 800 * 600 60.317
4 65.000 48.363 VESA 1024 * 768 60.004
5 74.500 44.772 CTV 0.92MW 1280 * 720 59.855
6 79.500 47.776 CVT 2.3MA 1280 * 768 59.870
7 85.500 47.712 VESA 1360 * 768 60.015
8 108.000 63.981 VESA 1280 * 1024 60.020
9 138.500 66.587 VESA (reduced blanking) 1920 * 1080 59.934

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4. Mechanical Instructions
Note: Below is the main process for disassemble only. And maybe some of the pictures are a little
difference with the original TV, for reference only.
LY19Z6
Step1. Unscrew the 4 screws to remove the STAND ASS'Y.
Step2. Unscrew the 6 screws to remove the REAR COVER.

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Step3. Remove the all the detachable CON/WIRES and AC COVER ASS’Y.
Note: Yellow frame are for CON/WIRES; Red circle is for AC COVER ASS’Y.
Step4. Unscrew the 13 screws as red circle to remove HINGE BKT, AC BKT, POWER BD and DVD;
Disconnect the DVD HARNESS as yellow frame.

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Step5. Unscrew the 11 screws as red circle to remove MAIN BD, KEY COVER, BKT and Side_I/O
BKT.

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Step6. Separate the BEZEL, PANEL and KEY BD; Disconnect the FFC CABLE.
The PANEL.

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LYF24Z6
Step1. Unscrew the 4 screws to remove the STAND ASS'Y.
Step2. Unscrew the 6 screws to remove the REAR COVER.

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Step3. Remove the all the detachable CON/WIRES, AC COVER ASS’Y and HINGE BRACKET.
Note: Yellow frame are for CON/WIRES; Red circle is for AC COVER ASS’Y and HINGE BRACKET.
Step4. Unscrew the 17 screws as red circle to remove AC BKT, BKT, POWER BD, MAIN BD and
DVD; Disconnect the DVD HARNESS and LVDS HARNESS as yellow frame.

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Step5. Unscrew the 3 screws as red circle to remove BKT, KEY BD and KEY COVER.

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Step6. Separate the BEZEL and 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（No LED）
Replace the main board
Replace the Power board
No
Yes
No
Yes
No
No
Power board output＝5V?
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 = 5V?
Replace the Panel
No display (LED blue)
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＝43V?
Check TV is under control and power
on/off by remote control and power key?