Chapter 1: General Information 1-1. Table of Contents 1. General Information................1-1. Table of Contents 1-2. General Guidelines 1-3. Important Notice 1-4. How to Read this Service Manual ..................3. Location of Controls and Components........... 3-1. Board Location 3-2. Main Board & AV Board 3-3.
1-2. General Guidelines When servicing, observe the original lead dress. If a short circuit is found, replace all parts which have been overheated or damaged by the short circuit. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly installed.
1-3-6 Safety Check after Repairment in the original positions, or whether there are the positions which are deteriorated around the serviced places serviced or not. Check the insulation between the antenna terminal or external metal and the AC cord plug blades. And be sure the safety of that. General Servicing Precautions 1.
Electrostatically Sensitive (ES) 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 ncidence of component damage caused by static by static electricity.
1-3-8. Photo used in this manual The illustration and photos used in this Manual may not base on the final design of products, which may differ from your products in some way. 1-4. How to Read this Service Manual Using Icons: each icon is described in the table below: Note: A “note”...
Service Manual Model No.: 2. Speci cations Model L22B1120 Screen Size 21.5 inch Aspect Ratio 16:9 Resolution 1366* 7 68 6.5 (GRAY TO Response Time (ms) GRAY) +88/-88(H), +88/-88 Angel of View (V) Typ. Color Display 16777216 Cable :1-135/ Air: No.
3-2-1 Function Description: Main Board Process signal which incept from exterior equipment then translate into signal that panel can display. 3-2-2 Connector defnition Main board connector Power connectors (J15 J16) Pin number Signal name Pin number Signal name high voltage POWER ON/OFF +5VSTB +12V...
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remote connector (J6) Pin number Signal name Description LED_R LAMP RED LED_G LAMP GREEN REMOTE CONTROL POWER FOR REMOTE Keypad and connector (J7) Pin number Signal name Description KEY1 KEY0 - 10 -...
Speaker connector J11 Pin number Signal nameD escription 3-3. Power Board 3-3-1 Function Description: Supply power for Main board, Panel. Pin number Signal name POWER ON/OFF +5VSTB +12V +12V - 11 -...
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3-4-1 Function Description: Display the signal. PIN NO. REMARK FUNCTION RXO0- minus signal of odd channel 0(LVDS) RXO0+ plus signal of odd channel 0(LVDS) RXO1- minus signal of odd channel 1(LVDS) RXO1+ plus signal of odd channel 1(LVDS) RXO2- minus signal of odd channel 2(LVDS) RXO2+ plus signal of odd channel 2(LVDS) RXOC-...
4. Disassemble and assemble 4-1 Remove the Pedestal 4-3. Remove the adhesive tape (The location of the adhesive tape as follows) Remove the adhesive tape indicated on the faces upward 4-2Remove the Back Cover unit. - 14 -...
4-6 Remove the speaker 4-7 Remove the remote control Take out the speaker Remove the screw, take out the remote control board 5. Installation Instructions 5-1 External Equipment Connections Accessories POWER MUTE MTS/SAP RECALL MENU SOURCE ENTER EXIT TV DISPLAY AUTO ASPECT SLEEP...
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VIDEO EQUIPMENT with YPbPr Yellow (video) White(audio L) Red(audio R or Pr) Blue(Pb) Green(Y) HDMI 1 HDMI 2 PC AUDIO VGA INPUT RF INPUT HEADPHONE COAXIAL INPUT AUDIO COMPONENT INPUT INPUT AC INPUT 100-240V~50/60Hz HDMI VIDEO EQUIPMENT TO VIDEO output To audio outputs - 18 -...
5-2 HDMI Connections When the source device supports HDM How To Connect 1. Connect the source device to HDMI port of this TV with an HDMI cable(not supplied with this product). 2. No separated audio connection is necessary. How To Use If the source device supports Auto HDMI function, the output resolution of the source device will be automatically set to 1280x720p.
Cable sample HDMI Cable (not supplied with the product) HDMI to DVI Cable ( not supplied with the product) Analog Audio Cable (Stereo to RCA type) (not supplied with the product) Connecting Headphones You can connect a set of headphones to your set if you wish to watch a TV programmer without disturbing the other people in the room.
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Power source TO USE AC POWER SOURCE Use the AC polarized line cord provided for operation on AC. Insert the AC cord plug into a standard polarized AC outlet. NOTES: Use the attached power cord only. electrician replace the obsolete outlet. simply unplug the unit from the AC outlet and plug it back in.
6. Operation Instructions Basal information 6-1 Front panel controls SOURCE MENU VOL+ VOL- STANDBY 1. SOURCE: Display the input source menu. 2. MENU: Display main MENU. 3. CH+/CH-: In TV mode, press "CH+" or "CH-" to change the channel up and down. In MENU mode, press "CH+"...
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8.1 How to enter into the factory model 1. You can press "source-2-5-8-0" to go into factory setting. Presse the key "exit" to shut the factory setting. Content: 1: ADC setting: set ADC value of YUV,VGA. It can also be auto-set. Adopt 100% color bar to yuv and Checkerboard signal to vga.
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8.2 How to update software Haier MSD318QT F/W upgrade with USB SOP Step 1: Ready for F/W Upgrade 1.1 Prepare a USB memory . from computer’s USB port! Step 2: F/W Upgrade 2.1 AC ON 2.2,Then input USB, press POWER.
9-2. Main board failure check Service guide 1) Black creen Is power LCD normal? Check Q2,Q3 and the 2) White screen on VCC pins of J9 Check if Q31 is working Signal on J9 Check if J9 is - 44 -...
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3) Panel display abnormally connector J9 is at normal level - 45-...
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4) No sound No sound Check the input Check if there is sound input source signal Check if the volume control is Reset at 0 level or muted volume Check the Check if there is output at speakers Check if the power supply Check if there is +12V input at system is damaged, short PIN28 of U19...
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5)TV failure TV no channel Fix the RF Check if there is RF signal input Check the power Check if there is supply circuit to +5V at PIN2 of this PIN Check if there is I2C signal at PIN6 & Check if there is PIN7 of TUNER1 intermediate...
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6) HDMI no picture or picture abnormal If CN10 is R301,R310,R319,R317, R111,R112,R113,R114,R116, R117,R100,R105,R106,R108. R351,R338,R343 Q305 Q11,Q12 - 48 -...
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7) PC no picture or picture abnormal - 49 -...
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8) YPBPR, AV no picture or picture abnormal Check Y - 50 -...
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Failure Mode Part Name Description Phenomena Failure cause White Screen B/L normal, only white screen display M a y b e c a u s e d by surge current Black Screen B/L normal, and EDS only Black screen display FIIcker Crosstalk Vcom imbalance...
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Part Name Description Phenomena Failure cause I n c o m i n g I n s p e c t i o n Standard Bright dot dark dot in Dot Defect pannel Bladder between Polarizer and top glass Polarizer Bubble Bladder in Polarizer P a n e l o r Tine or rigidity arose...
9-3. Pannel failure Failure Mode Part Name Description Phenomena Failure cause Block Defect :TCP cracking or cracking Dim or L/D :TCP Sunken V B/D Vertical bar :TCP lead cracking :ACF bonding short :Awful environment and something electric enter V Dim Vertal gray line into LCD :Mis-align between TCP and...
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Failure Mode Part Name Description Phenomena Failure cause Mechanlcal When Caused Nolse turn panel,appear b y M e c h a n i c a cacophony noise of backlight unit Ripple Connectric circle Causeed by between mechanism and pannel B/L off B/L lose action Connect badness...
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Failure Mode Part Name Description Phenomena Failure cause Brightness B/L unit badness at bottom of LCM Light leakage brighter than normal B / L b r i g h t n e s s Sheet in B/L unit Mechanlcal or B/ asymmetric is uneven Uniformity...
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Sincere Forever Haier Group Haier Industrial Park, No.1, Haier Road 266101, Qingdao, China http://www.haier.com Printed in China...