Kogan LET40T3 Service Manual
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Kogan LET40T3 Service Manual

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This service information is designed for experienced repair technicians only and is not designed for use by the general public.
It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.
Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service or repair
the product or products dealt with in this service information by anyone else could result in serious injury or death.

SERVICE MANUAL

WARNING
©2009 Qingdao Haier Electronics Co., Ltd.
All rights reserved. Unauthorized copying and distribution is a violation of law.
Kogan Group
Model No.
MSD209
Order No.
TV1101S003V0
LED LCD TV
LET40T3
Chassis

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Summary of Contents for Kogan LET40T3

  • Page 1: Service Manual

    Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service or repair the product or products dealt with in this service information by anyone else could result in serious injury or death. ©2009 Qingdao Haier Electronics Co., Ltd. All rights reserved. Unauthorized copying and distribution is a violation of law.

  • Page 2: Table Of Contents

    Service Manual Model No.: LET40T3 CONTENTS Chapter 1.General Information 1-1. Document Information ............... 3 1-2. General Guidelines ................3 1-3. Important Notice ................... 3 1-3-1. Follow the regulations and warnings ............. 3 1-3-2. Be careful to the electrical shock ............3 1-3-3.
  • Page 3 Service Manual Model No.: LET40T3 4-3-1. Function description:................14 4-3-2. Connector definition: ................14 4-4. LCD Panel ..................... 15 4-4-1. Function Description: Display the signal..........16 4-4-2. Connector definition: ................16 Chapter 5. Installation Instructions 5-1. External Equipment Connections ..........

  • Page 4: Chapter 1.General Information

    Service Manual Model No.: LET40T3 Chapter 1.General Information 1-1. Document Information Document format: Adobe PDF Author: Compiler: 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.

  • Page 5: About Lead Free Solder (Pbf)

    Service Manual Model No.: LET40T3 techniques should be used to help reduce the incidence of component damage caused by electros static discharge (ESD). 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"...
  • Page 6 Service Manual Model No.: LET40T3 a. Removing or reinstalling any component, circuit board module or any other receiver assembly. b. Disconnecting or reconnecting any receiver electrical plug or other electrical connection. c. Connecting a test substitute in parallel with an electrolytic capacitor in the receiver.

  • Page 7: Ordering Spare Parts

    Service Manual Model No.: LET40T3 13. Use only an anti-static type solder removal device. Some solder removal devices not classified as "anti-static" can generate electrical charges sufficient to damage ES devices. 14. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ES devices.

  • Page 8: How To Read This Service Manual

    Service Manual Model No.: LET40T3 1-4. How to Read this Service Manual 1-4-1. Using icons: Icons are used to attract the attention of the reader to specific information. The meaning of each icon is described in the table below: Note: A “note”...

  • Page 9: Chapter 2. Specification

    Service Manual Model No.: LET40T3 Chapter 2. Specification 2-1. Specification list Model LET40T3 Screen size 40 inch Aspect ratio 16:9 Resolution 1920*1080 Response Time(ms) 6 ms Angel of view Contrast 5000:1 Brightness 450cd/m2 OSD language English etc. Color system PAL\SECAM...

  • Page 10: External Pictures (Four Faces)

    Service Manual Model No.: LET40T3 2-2. External pictures (four faces) Front Side Left Side...

  • Page 11: Chapter 3. Disassemble And Assemble

    Service Manual Model No.: LET40T3 Back Side Chapter 3. Disassemble and Assemble 3-1. Remove the Stand 1. Lay down the unit so that back cover faces upward 2. Remove the Five screws from the back cover which are indicated with the circles in the picture above.

  • Page 12: Remove The Power Cord

    Service Manual Model No.: LET40T3 3-2. Remove the Power Cord 2. Then remove the back cover from the unit. Remove the screw indicated by the red circles in below picture. Then remove the power cord. 3-4. Remove the Mainboard Remove the five screws indicated by the red circles in below picture.

  • Page 13: Remove The Keypad

    Service Manual Model No.: LET40T3 3-8. Remove the Stand backstop Remove the six screws indicated by the red circles in below picture. Take out the stand backstop. 3-6. Remove the Keypad The Keypad is conglutinated with front frame , just uncover the keypad gently.

  • Page 14: Chapter 4. Location Of Controls And Components

    Service Manual Model No.: LET40T3 Chapter 4. Location of Controls and Components 4-1. Board Location Parts number Description A Board 0094001076AD LCD Panel B Board 0094001897 Power Board C Board DC19B0E0400M Mainboard (0090723445) 4-2. Main Board CN10 CN27 CNB3 CNB4...

  • Page 15: Function Description

    Service Manual Model No.: LET40T3 4-2-1. Function Description: Main Board Process signal which incept from exterior equipment then translate into signal that panel can display. 4-2-2. Connector definition Main board connector Speaker connector (CN27) Keypad Connector (CNB3) Pin number Signal name...

  • Page 16: Lcd Panel

    Service Manual Model No.: LET40T3 4-3-1. Function description: To supply power for Mainboard, Panel. 4-3-2. Connector definition: Pin number Signal name Pin number Signal name Pin number Signal name +12V +12V +12V BL-ON/OFF 5VSTB STATUS E-PEM E-PWM PW-ON/OFF PB-ON/OFF 4-4. LCD Panel...

  • Page 17: Function Description: Display The Signal

    Service Manual Model No.: LET40T3 4-4-1. Function Description: Display the signal. 4-4-2. Connector definition: CN1 Connector Pin number Symbol Description DC Power Supply DC Power Supply DC Power Supply DC Power Supply DC Power Supply Ground Ground Ground Rx1[0]N LVDS Signal -...
  • Page 18 Service Manual Model No.: LET40T3 Pin number Symbol Description Rx3[0]N LVDS Signal - Rx3[0]P LVDS Signal + Rx3[1]N LVDS Signal - Rx3[1]P LVDS Signal + Rx3[2]N LVDS Signal - Rx3[2]P LVDS Signal + Ground Rx3CLK- LVDS Clock - Rx3CLK+ LVDS Clock +...
  • Page 19 Service Manual Model No.: LET40T3 CN2 Connector Pin number Symbol Description DC Power Supply DC Power Supply DC Power Supply DC Power Supply DC Power Supply Ground Ground Ground Rx2[0]N LVDS Signal - Rx2[0]P LVDS Signal + Rx2[1]N LVDS Signal -...
  • Page 20 Service Manual Model No.: LET40T3 Pin number Symbol Description Rx4[1]P LVDS Signal + Rx4[2]N LVDS Signal - Rx4[2]P LVDS Signal + Ground Rx4CLK- LVDS Clock - Rx4CLK+ LVDS Clock + Ground Rx4[3]N LVDS Signal - Rx4[3]P LVDS Signal + Rx4[4]N...

  • Page 21: Chapter 5. Installation Instructions

    Service Manual Model No.: LET40T3 Chapter 5. Installation Instructions 5-1. External Equipment Connections Accessories Batteries Remote Control Antenna Connection: Connect one end of a coaxial cable (not included) to the ANT IN jack on the back of your TV/DVD combo, then connect the other end of the cable into the antenna or cable TV wall outlet.

  • Page 22: Choose Your Connection

    Service Manual Model No.: LET40T3 If you need to split the antenna signal to connect two TVs, install a two-way splitter. Choose Your Connection There are several ways to connect your television, depending on the components you want to connect and the quality of the signal you want to achieve. The following are examples of some different ways to connect your TV with different input sources.
  • Page 23 Service Manual Model No.: LET40T3 Connecting a VCR with an S-Video cable An S-Video connection provides better video than a standard AV connection. To connect a VCR with an S-Video cable: 1. Make sure that your TV/DVD combo and the VCR are turned off;...

  • Page 24: Connecting An Hdmi Device

    Service Manual Model No.: LET40T3 Connecting an HDMI device An HDMI connection provides the best video and audio,An HDMI cable carries both video and audio,so you do not need to make an audio connection. To connection HDMI device: 1 Make sure that your TV/DVD combo and the HDMI device are turned off.

  • Page 25: Hdmi Connections

    Service Manual Model No.: LET40T3 Supported video modes for a computer Mode Resolution Line frequency(KHZ) Frame frequency 640*480 31.5 SVGA 800*600 37.9 1024*768 48.4 Notes: If the computer dose not support one of the following videos, you may need to replace or add a video card.

  • Page 26: Cable Sample

    Service Manual Model No.: LET40T3 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 program without disturbing the other people in the room.
  • Page 27 Service Manual Model No.: LET40T3 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: ■ Never connect the AC line cord plug to other than the specified voltage.

  • Page 28: Chapter 6. Operation Instructions

    Service Manual Model No.: LET40T3 Chapter 6. Operation Instructions 6-1. Get to know your TV...

  • Page 29: Get To Know Your Remote Control

    Service Manual Model No.: LET40T3 6-2. Get to know your remote control...

  • Page 30: Chapter 7. Electrical Parts

    Service Manual Model No.: LET40T3 Chapter 7. Electrical Parts 7-1. Block Diagram...
  • Page 31 Service Manual Model No.: LET40T3...

  • Page 32: Circuit Diagram

    Service Manual Model No.: LET40T3 7-2. Circuit Diagram...
  • Page 33 Service Manual Model No.: LET40T3 R465 R463 R464 R466 NC/4.7K R468 NC/4.7K R467 NC/2.2K R348 C376 1nF C208 DD69 DD65 DD70 DD54 C375 100P DD71 ESD 390R R390 SOP8-DI SOP8-DI SOP8-CLK SOP8-WP/Vpp SOP8-CLK SOP8-WP/Vpp SOP8-HOLD SOP8-DO SOP8-HOLD SOP8-DO SOP8-VCC SOP8-CS...
  • Page 34 Service Manual Model No.: LET40T3 8 6 4 2 7 5 3 1 VSSDL VSSDL VSSQ VSSQ VDDQ VSSQ VDDQ VSSQ VDDQ VSSQ VDDQ VSSQ VDDQ VSSQ VDDQ VSSQ VDDQ VSSQ VDDQ VSSQ VDDQ VSSQ VDDQ VSSQ VDDQ VSSQ VDDQ...
  • Page 35 Service Manual Model No.: LET40T3 RX2B2P RX2B2N RX2B1P RX2B1N RX2B0P RX2B0N HDMI_HP2 RX2BCLKP RX2BCLKN RX3B2P RX1B2P RX3B2N RX1B2N RX3B1P RX1B1P RX3B1N RX1B1N RX3B0P RX1B0P RX3B0N RX1B0N HDMI_HP3 HDMI_HP1 RX3BCLKP RX1BCLKP RX3BCLKN RX1BCLKN...
  • Page 36 Service Manual Model No.: LET40T3...
  • Page 37 Service Manual Model No.: LET40T3 DD57 DD58 SHELL SHELL...
  • Page 38 Service Manual Model No.: LET40T3...
  • Page 39 Service Manual Model No.: LET40T3 ANT_Power 5V_B1 BB(5V) 5V_B2 TUNER_RF-AGC MB(5V) 5V_B3 TUNER-SDA TUNER-SCL R1320 NC/0R DIF+ DIF- IF-AGC IF_TV shield shield shield shield Body Body RF_AGC VTU_TP IF_AGC IF-AGC IF_TV Body Body...
  • Page 40 Service Manual Model No.: LET40T3 8 6 4 2 8 6 4 2 7 5 3 1 7 5 3 1 SADD0 SADD1 SADD2 SADD3 SADD4 SMTEST CVDD CVDD CVDD CVDD CVDD OSCMODE CVDD...
  • Page 41 Service Manual Model No.: LET40T3...
  • Page 42 Service Manual Model No.: LET40T3 ESD_HDMI ESD_HDMI...
  • Page 43 Service Manual Model No.: LET40T3 VDD_PLL CONFIG VDD_DIG TEST_MODE VDD_DIG VCC1A GND_DIG VCC1B GND_Clean GND_DIG GND_SUB VCC2 GND1A VCC1 GND_SUB GND1B GND2 VCC2A GND2A GND1 VCC2B GND2B...
  • Page 44 Service Manual Model No.: LET40T3...
  • Page 45 Service Manual Model No.: LET40T3 VREF MVREF VDDL VDDQ VDDQ VSSQ VDDQ VSSQ VDDQ VSSQ VDDQ VSSQ VDDQ VSSQ VDDQ VSSQ VDDQ VSSQ VDDQ VSSQ VDDQ VSSQ VSSQ VSSDL 8 6 4 2 8 6 4 2 8 6 4 2...

  • Page 46: Wiring Connection Diagram

    Service Manual Model No.: LET40T3 7-3. Wiring Connection Diagram Keypad Assembly...

  • Page 47: Chapter 8. Measurements And Adjustments

    Service Manual Model No.: LET40T3 Chapter 8. Measurements and Adjustments 8-1. Service Mode 8-1-1.How to enter into Service Mode The way to the factory mode menu: 1st, press menu, 2en, input 8893, Finished these operations ,system will be into the factory mode menu.

  • Page 48: Video

    Service Manual Model No.: LET40T3 8-2-2. Video Color Temperature This page is control the Color Temperature, and the picture size. Picture Mode This page is control the picture effect , like Brightness,contrast,color,sharpness.

  • Page 49: Audio

    Service Manual Model No.: LET40T3 8-2-3. Audio This page is control the sound effect ,from 100Hz to 10KHz. 8-2-4. Software UpDate NOTE : After software update ,turn to the Factory In this page , you just consider the software Setting 1 page reset all.

  • Page 50: Chapter 9. Trouble Shooting

    Service Manual Model No.: LET40T3 Chapter 9. Trouble shooting 9-1. Simple check Verify if the television is properly plugged Verify if the television is properly supplied power No picture/ No sound Verify if electricity is available. Verify if correct signals are input...

  • Page 51: Power Supply Board Failure Check

    Service Manual Model No.: LET40T3 9-2. Power Supply Board Failure Check. State:No picture First,check cables which connect with PSU,then check as follows Check input voltage voltage: +5VSB----POWER ON(2.6V) -----+12V +12V CN10 Power +12V 5VSTB PB-ADJUST R350 PW_ON/OFF-INV R341 PB-ON/OFF 5VSTB...

  • Page 52: Mainboard Failure Check

    Service Manual Model No.: LET40T3 9-3. Mainboard Failure Check Symptom: No Sound No Sound (All Mode) Fail Check the input Change Source input Source Pass Fail Check Re-soldering or change input/output IC U13 Of IC U13 of Main Pass Fail...

  • Page 53: Pannel Failure

    Service Manual Model No.: LET40T3 9-4. Pannel Failure Failure Mode...
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  • Page 58 Sincere Forever Haier Group Haier Industrial Park, No.1, Haier Road 266101, Qingdao, China http://www.haier.com Printed in China...

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