Changhong Electric LS18 Maintenance Manual
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Changhong Electric LS18 Maintenance Manual

Changhong Electric LS18 Maintenance Manual

Lcd colour tv msd308/309px
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LCD COLOUR TV
MAINTENANCE MANUAL
MODEL: LS18 CHASSIS（MSD308/309PX）
Please read this manual carefully before maintenance
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Summary of Contents for Changhong Electric LS18

  • Page 1 All manuals and user guides at all-guides.com LCD COLOUR TV MAINTENANCE MANUAL MODEL: LS18 CHASSIS（MSD308/309PX） Please read this manual carefully before maintenance...

  • Page 2: Table Of Contents

    Chapter8 Factory mode parameter setting instructions and notes ................... 20 8-1 Enter into the factory mode ............................20 8-2 Setting method of factory menu ..........................21 Chapter9 Instructions of LS18 module Circuit Schematic Diagram ..................22 Appendix ： Circuit Schematic Diagram ..........................25...

  • Page 3: Chapter1 Safety And Notes

    All manuals and user guides at all-guides.com Chapter1 Safety and notes 1-1 Installation notes (1) Please don't beat or rub, scratch the surface of the LCD screen heavily, don’t touch it with your hand casually. (2) When the screen is dirty, please clean it with absorbent cotton or cotton cloth slightly. (3) Please clean it timely when water or other viscosity pollution fall, which may make the LCD face or color change.

  • Page 4: High-Voltage Warning

    All manuals and user guides at all-guides.com dismantle, we can take some photos of the line route for the comparison of installing. (4)After check and maintenance, please assure that there is no foreign body in the machine when install. 1-5 High-voltage warning The high-voltage of the LCD screen is generated by the power supply step-up board, without attention to exposure to the high voltage, one may meet a serious electricity shock.

  • Page 5: Introduction Of Terminals(Practicality Photos)

    All manuals and user guides at all-guides.com Power power supply AC100V~240V, 50/60Hz power achievement <150W + 0° ~ + 40° ， operation temperature requirement for environment storage temperature - 20 ° ~ + 60° operation humidity 10% ~ 85% appearance size W x H x D net weight no accessory...

  • Page 6: Chapter3 Main Chip Functions And The Introductions Of Power Supply

    1.HDMI and YPbPr support to 1080P； 2.The recommendation resolving ratio of PC is 1024X768； 3.Side AV input must use a small board. Chapter3 Main chip functions and the introductions of power supply 3-1 Main IC and functions of LS18 No. Item no. Model Main function DTI1-E4I1VH(JUB2.891.170)
  • Page 7 All manuals and user guides at all-guides.com U51: AP1534SG13 U11: STA335BW U39: LR1117/A-1.8 U24:FLASH U15:DDR U52: AO4459 U4:EEPROM U37: LR1117/A-3.3 U36: LR1117/A-2.5 U9:DDR U38: LR1117/A-3.3 U18: AS7805DTR-E1 U2: MSD308PX U30: SAW U53: AO4803A U19: SGM330A-YQS U17: SGM330A-YQS U10: DTI1-E4I1VH (JUB2.891.170) U20: SN74LV4052...

  • Page 8: Pin Function Description Of Ls18 Chip

    All manuals and user guides at all-guides.com 3-2 Pin function description of LS18 chip 3-2-1 MSD308PX recommended operating power conditons 3-2-2 Pin function of DTI1-E4I1VH tuner SYMBOL Description Not connect VCC2 +5V POWER RF-AGC RF-AGC monitor(Not connect) I2C Serial Clock...

  • Page 9: Sgm330 Brief Introduction

    All manuals and user guides at all-guides.com 3-2-5 SGM330 brief introduction: Pin introduction: SYMBOL Function description S1A, S1B, S1C, S1D 2,3,5,6,10,11,13,14 Analog video I/O S2A, S2B, S2C, S2D Select input Switch-enable input 4,7,9,12 DA, DB, DC, DD Analog video I/O Ground Power supply 3.3 Brief introduction of power supply...

  • Page 10: Chapter4 The Chassis Frame Diagram, Mainboard Power Supply Systems, Mainboard Interface Definition And The Waveform Of Key Points

    All manuals and user guides at all-guides.com Chapter4 The chassis frame diagram, mainboard power supply systems, mainboard interface definition and the waveform of key points This chapter mainly introduce the chassis frame diagram, power supply system, interface definition and each key point’s wave shape. 4-1 The chassis frame diagram 4-2 Power supply system Power board has two kinds of output voltage: +12V and +5V.

  • Page 11: Pin Voltage Of The Voltage Adjustor On The Mainboard

    All manuals and user guides at all-guides.com 4-2-2 Pin voltage of the voltage adjustor on the mainboard 1.32V 1.8V 2.5V PIN4,5 =5V PIN9,10=12V 3.3V 3.3V item No. U37,U38 output voltage 1.8V 1.32V 3.3V 2.5V...

  • Page 12: Interface Definition

    All manuals and user guides at all-guides.com 4-2-3 Interface definition Backlight ON/OFF LED IR ON/OFF HDMI3’s signal 5VSTB side AV’s signal Used for USB POWER...

  • Page 13: The Waveform Of Key Points

    All manuals and user guides at all-guides.com 4-3 The waveform of key points...

  • Page 14: Chapter5 Software Upgrade Instructions

    All manuals and user guides at all-guides.com Chapter5 Software upgrade instructions 5-1 Software upgrade tooling---there are two kinds of using upgrade tooling 1.Use the combined interface(the parallel port) upgrade tooling: use the upgrade programme: TV Utility_4.4. 2.Use interface upgrade tooling, use the upgrade programme: versions higher than TV Utility_4.4 Combine interface or USB Computer upgrade...
  • Page 15 All manuals and user guides at all-guides.com 3.Pls select “OK” once you connect the tooling successfully 4.Select “Read”...
  • Page 16 All manuals and user guides at all-guides.com 5. Choose right SW document and open the file. 6. Select “Auto”...
  • Page 17 All manuals and user guides at all-guides.com 7. Select “Run”. 8. The SW is updating.
  • Page 18 All manuals and user guides at all-guides.com 9. Pls turn on the TV again once the SW is updated successfully.

  • Page 19: Chapter6: Classical Accident Maintenance Procedures And Examples

    All manuals and user guides at all-guides.com Chapter6: Classical accident maintenance procedures and examples 6-1 The thinking of don’t boot 6-2 Common problems for your reference To speed you to dignose and solve problems, the following commom problems are offered for your reference Symptoms Possible Reason...

  • Page 20: Chapter7 High Voltage And High Current Wearing Parts List

    All manuals and user guides at all-guides.com Chapter7 High voltage and high current wearing parts list The introduction of maintenance parts are for reference only, modification of parameters will not be informed any more. For accurate data and related specifications, please consult the newest data of our company.

  • Page 21: Chapter8 Factory Mode Parameter Setting Instructions And Notes

    All manuals and user guides at all-guides.com Chapter8 Factory mode parameter setting instructions and notes 8-1 Enter into the factory mode Switch on TV set, and make it works normally: Press 【SOURCE】 key on the remote control Press number keys “3”、“1”、“3”、“8” on remote control to enter password. Finish entering the factory mode.

  • Page 22: Setting Method Of Factory Menu

    All manuals and user guides at all-guides.com Picture Mode standard Picture Mode Soft Contrast Contrast Brightness Brightness Saturation Saturation Sharpness Sharpness Picture Mode Vivid Picture Mode User Contrast Contrast Brightness Brightness Saturation Saturation Sharpness Sharpness COLORTEMP Setting items value Color temp mode cool Color temp r gain Color temp g gain...

  • Page 23: Chapter9 Instructions Of Ls18 Module Circuit Schematic Diagram

    All manuals and user guides at all-guides.com Chapter9 Instructions of LS18 module Circuit Schematic Diagram 9-1 Clear EEPROM,and set the parameters after upgrading according to the upgrade instructions 9-2 Check each channel/source to see if the image and sound are normal...
  • Page 24 All manuals and user guides at all-guides.com R-AV 插座 AVW-15-5R-8.5 R-AV 插座 AVW-15-5R-8.5 K9352D$K9352N$HDAF38A2D$D9352H R-声表面滤波器 R-AV 插座 AVW-13-3RE-1S-8.5-A 线卡 1040K130--G005 R-耳机插座 ZW-3F-7P-B DL1015-220K$LCP112-22μH R-固定电感 R-固定电感 DL1015-220K$LCP112-22μH DL1015-220K$LCP112-22μH R-固定电感 R-固定电感 DL1015-220K$LCP112-22μH JUG7.820.686-1 R-按键板印制板 R-包装袋 JUC8.840.023 AS7805DTR-E1 R-电源集成电路 SN74LV4052ADR$74HCT4052D$74HC4052D R-逻辑集成电路 $M74HC4052RM13TR R-AV 插座 AVW-13-3R-8.5-TV-A R-AV 插座...
  • Page 25 All manuals and user guides at all-guides.com LBA277T1 R-贴片二极管 L2N7002LT1G$2N7002LT1G$L2N7002LT1$2 R-场效应管 N7002E$2N7002-N72 L2N7002LT1G$2N7002LT1G$L2N7002LT1$2 R-场效应管 N7002E$2N7002-N72 L2N7002LT1G$2N7002LT1G$L2N7002LT1$2 R-场效应管 N7002E$2N7002-N72 FHBAT54C-E$BAT54CLT1G$LBAT54CLT1G R-贴片二极管 R-贴片二极管 FHBAT54C-E$BAT54CLT1G$LBAT54CLT1G FHBAT54C-E$BAT54CLT1G$LBAT54CLT1G R-贴片二极管 R-瓷介电容 1206F105Z500NT 1206F105Z500NT R-瓷介电容 RY21-2W-0.27ΩJ RI-15×3 R-氧化膜电阻 CD110X-16V-470μFM T-B-3.5 R-铝电解电容 R-遥控接收板组件 JUG6.695.480 R-按键板组件 JUG6.694.512 R-主板组件 JUG6.690.717 R-按键板组件...

  • Page 26: Appendix ： Circuit Schematic Diagram

    All manuals and user guides at all-guides.com Appendix ： Circuit Schematic Diagram Power Input 1.32V DC-DC DVD Power Interface 3.3VU 1.32V NC/MP1482 CON24 1482VCC 1482OUT 15uH/2A CON7-2.0mm L:OFF R296 R295 H:ON 4.7K 100k 1482EN C122 1482COMP 0.1u CA56 PWRDN COMP CA51 NC/SS34 330R...
  • Page 27 All manuals and user guides at all-guides.com HDCP KEY EEPROM MSD309PX MSD309PX TS back from CI TS to CI 3.3VA PCMCIA PCM_OE_N PCM_OE_N MSD309PX TS_MDO[7:0] TS_MDI[7:0] PCM_IORD_N PCM_IORD_N 5 TS_MDO[7:0] CI_D0 Y 16 TS1_D0 TS_MDO0 TS_MDI7 PCM_IRQA_N R341 4.7K C316 PCM_IRQA_N 5 HDMI AUDIO...
  • Page 28 All manuals and user guides at all-guides.com RP39 RP50 22RX4 22RX4 MIUA_DQS0 MA_DQS0 MIUA_DQS0 MIUA_DQS0B MA_DQSB0 MA_MCLK MIUA_DQS0B MIUA_MCLK MA_MCLKZ 1.8VA MIUA_MCLKZ RP57 22RX4 MIUA_DQS1 MA_DQS1 MIUA_DQS1 MA_DQSB1 MIUA_DQS1B U9 W9751G6IB-25 MIUA_DQS1B MA_DQM1 MA_DQM0 MA_DQS0 A_MVERF Close to DRAM LDQS Vref MIUA_ODT MA_ODT...
  • Page 29 All manuals and user guides at all-guides.com TUNER RF AGC Switch DTI1-E4I1VH LG TDTC-G501D SAMSUNG DTOS403IR121 +5V_B2_A Q404靠近 t uner R FA G C 脚放置 CH DTI1-E4I1VH CON79 +5V_B1_A T_RF_AGC RF_AGC C455 C460 RF_AGC IF_TV C453 C471 IF_OUT Q404 100uF 0.1u #IF_OUT MMBT3906...
  • Page 30 All manuals and user guides at all-guides.com CARD DETECT PWR CTRL FB/500mA VCC-PCMCIA Q38 NC/A03401 R397 R393 C853 NC/10n R711 DD40 R708 NC/10K BAT54C PCM_CD1_N NC/4.7k R660 NC/100K R659 100R PCM_CD_N R716 PCM_CD2_N NC/10k R715 R658 NC/MMBT3904 NC/1K R713 NC/1k NC/MMBT3904 PCM_PWR_CTL PCMCIA Connector...
  • Page 31 All manuals and user guides at all-guides.com HDMI Input HDMI CEC CON9 DB2+ R133 RXB2P DATA2+ RXB2N RXB0N 3.3VU R135 RXB0N DATA2 SHIELD DB2- R137 RXB1P RXB0P RXB0P DATA2- DB1+ R136 RXB1N RXB1N DATA1+ RXB1N RXB0P RXB1P R139 R324 RXB1P DATA1 SHIELD DB1- R140...
  • Page 32 All manuals and user guides at all-guides.com VGA INPUT Audio switch Audio switch VGA-G R138 RGB1_SOG ESD-0603 5VPA R156 DD21 ISP-RXD HD1-Y ISP-RXD R113 ESD-0603 VGA-B R131 5VPA ISP-TXD RGB1_G+ DD20 ISP-TXD HD1-Pb 2010.3.18 FB/100mA ESD-0603 DD14 VGA-HS VGA-R R130 RGB1_B+ CON7 R165...
  • Page 33 All manuals and user guides at all-guides.com 5V_USB1 +5V_USBO1 5V_USB0 +5V_USBO0 SMD1206P100TF_1A SMD1206P100TF_1A C143 C144 0.1u 0.1u close to USB connector close to USB connector USB_DPO R297 0R USB_DP USB_DMO USB_DM R282 0R CON9-2.0 DD44 DD58 +5V_USBO0 USB_DMO USB_DPO <=2pF <=2pF +5V_USBO1 ESD-0603...
  • Page 34 All manuals and user guides at all-guides.com AUDIO pre-ap Power Ampifier 12VA 12V_AMP R271 CON4 VCC-OP2 0.47R/2W CON4-2.0mm C2001 C2002 R312 +12V_AA +12V_AA 470uF/16V 470uF/16V 3.3VA STBV_3.3V FB220/300mA C164 2.2u SC2-OUTL 12V_AMP R307 AUOUTL0 MMBT3904 R288 R299 3.4k 3.4k R316 CH2OUT CH1OUT 330R...

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