Samsung 940Fn Service Manual
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Samsung 940Fn Service Manual

Lcd-monitor
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See also: Training Manual , User Manual
SERVICE
LCD Monitor
LCD-Monitor
Chassis
Model
Manual
Fashion Feature
- Lustrous/Colorful Appearance(Design)
- Integrated UI applied
- Built-in Scaler Sync Separator
- Connectivity : Analog (15p Dsub),
- Power Consumption : 38W
- DPMS : under 1 W (230Vac)
LHA19PS
940Fn
Dual (24p DVI-D)

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Summary of Contents for Samsung 940Fn

  • Page 1: Service Manual

    LCD-Monitor Chassis LHA19PS Model 940Fn SERVICE Manual LCD Monitor Fashion Feature - Lustrous/Colorful Appearance(Design) - Integrated UI applied - Built-in Scaler Sync Separator - Connectivity : Analog (15p Dsub), Dual (24p DVI-D) - Power Consumption : 38W - DPMS : under 1 W (230Vac)
  • Page 2 Samsung Electronics Co.,Ltd. -This Service Manual is a property of Samsung 416, Maetan-3Dong, Yeongtong-Gu, Suwon City, Electronics Co., Ltd. Gyeonggi-Do, Korea, 443-742 Any unauthorized use of Manual can be punished Printed in Korea under applicable International and/or domestic P/N : BN82-00136C-00 law.

  • Page 3: Operating Instructions And Installation

    10 Operating Instructions and Installation 10 Operating Instructions and Installation 10-1 Front 1. Menu button For documentations or works involving heavy text. Opens the OSD menu. Also use to exit the OSD menu or return to the previous menu. 3) Internet : Medium brightness For working with a mixture of images such as text 2.
  • Page 4 10 Operating Instructions and Installation 4. Enter button / Source button 6. Power button Activates a highlighted menu item. / Use this button for turn the monitor on and off. Push the 'SOURCE', then selects the video signal while the OSD is off. (When the source button is 7.

  • Page 5: Connecting The Monitor

    10 Operating Instructions and Installation 10-3 Connecting the monitor Rear of Computer Rear of monitor New Model Macintosh Old Model Macintosh 1. Connect the power cord for your monitor to the power port on the back of the monitor. Plug the power cord for the monitor into a nearby outlet. 2-1.

  • Page 6: Attaching A Base

    10 Operating Instructions and Installation 10-4 Attaching a Base - This monitor accepts a 75mm x 75mm VESA-compliant mounting interface pad. A. Monitor B. Mounting interface pad 1. Turn off your monitor and unplug its power cord. 2. Lay the LCD monitor face-down on a flat surface with a cushion beneath it to protect the screen. 3.

  • Page 7: Disassembly And Reassembly

    11 Disassembly and Reassembly 11 Disassembly and Reassembly This section of the service manual describes the disassembly and reassembly procedures for the TFT-LCD monitors. WARNING: This monitor contains electrostatically sensitive devices. Use caution when handling these components. 11-1 Disassembly (Simple - Stand) Cautions: 1.
  • Page 8 11 Disassembly and Reassembly 3. Lift up the back cover and Use the jig to remove the shield lamp. 4. Disconnect cables. 5. Lift up the shield and disconnect LVDS cable. 11-2...
  • Page 9 11 Disassembly and Reassembly 6. Lift up the LCD panel. 11-2 Disassembly (HAS-Stand) 1. Place monitor face down on cushioned table. Remove 2 screws from the stand and remove front cover. 11-3...
  • Page 10 11 Disassembly and Reassembly 2. Lift up the back cover and Use the jig to remove the shield lamp. 3. Disconnect cables. 4. Lift up the shield and disconnect LVDS cable. 11-4...
  • Page 11 11 Disassembly and Reassembly 5. Lift up the LCD panel. 11-3 Reassembly Reassembly procedures are in the reverse order of disassembly procedures. 11-5...
  • Page 12 11 Disassembly and Reassembly Memo 11-6...

  • Page 13: Pcb Diagram

    12 PCB Layout 12 PCB Diagram 12-1...
  • Page 14 12 PCB Layout Memo 12-2...

  • Page 15: Reference Infomation

    14 Reference Infomation 14 Reference Infomation 14-1 Technical Terms -TFT-LCD -Image Lock This means "Fineness adjustment " in LCD Monitor, (Thin film Transistor Liquid Crystal Display) ADC(Analog to Digital Converter) the features are "Fine" and "Coarse" This is a circuit that converts from analog signal to digital signals.
  • Page 16 14 Reference Infomation -Dot Pitch The image on a monitor is composed of red, green and blue dots. The closer the dots, the higher the resolution. The distance between two dots of the same color is called the 'Dot Pitch'. Unit: mm -Vertical Frequency The screen must be redrawn several times per sec- ond in order to create and display an image for the...

  • Page 17: Pin Assignments

    14 Reference Infomation 14-2 Pin Assignments Sync 15-Pin D-Sub Signal Cable Connector Type Separate Composite Sync-on-green Pin No. Green Green Green + H/V Sync. Blue Blue Blue DDC Return (GND) DDC Return (GND) DDC Return (GND) GND-R GND-R GND-R GND-G GND-G GND-G GND-B...

  • Page 18: Timing Chart

    14 Reference Infomation 14-3 Timing Chart This section of the service manual describes the timing that the computer industry recognizes as standard for computer- generated video signals. Table 2-1 Timing Chart VESA Mode VGA2/ VGA3/ 640/75 Hz 800/60 Hz 800/75 Hz 1024/60 Hz 1024/75 Hz 1280/60 Hz...

  • Page 19: Preset Timing Modes

    14 Reference Infomation 14-4 Preset Timing Modes -If the signal transferred from the computer is the same as the following Preset Timing Modes, the screen will be adjusted automatically. However, if the signal differs, the screen may go blank while the power LED is on.

  • Page 20: Panel Description

    14 Reference Infomation 14-5 Panel Description Maker VENDOR P/N PANEL_CODE PANEL_ABB STICKER_CODE Remarks LT140X1-002 BN07-00004A BN68-00239H LT150XS-L01 BN07-00009A LT150XS-L01-B BN07-00022A LTM150XS-L02 BN07-00005A LT181E2-132 BN07-00001A LT150XS-T01 BN07-00010A LTM181E3-132 BN07-00019A LT170E2-131 BN07-10001D LT181E2-131 BN07-10001E LTM170E4-L01 BN07-00018A LTM240W1-L01 BN07-00015A LTM213U3-L01 BN07-00016A LTM150XH-L01 BN07-00026A LTM150XH-L03 BN07-00027A LTM150XS-L01...
  • Page 21 14 Reference Infomation Maker VENDOR P/N PANEL_CODE PANEL_ABB STICKER_CODE Remarks LTA220W1-L01 BN07-00074B "Panel B-level panel code for 22"" TV Panel " LTA320W1-L01 BN07-00108A "Panel for AMLCD 32"" TV" LTM213U4-L01 BN07-00124A NARROW BEZEL 21 " PANEL LTM170E6-L04 BN07-00129A "HIGHLAND 17"" LOW PANEL (Panel only for TCO03)" LTM190E1-L01 BN07-00088A LTM190E1-L01 ZPD panel...
  • Page 22 14 Reference Infomation Maker VENDOR P/N PANEL_CODE PANEL_ABB STICKER_CODE Remarks CLAA150XG09 BN07-00141A "CPT 15"" Monitor new panel development" CLAA170EA02 BN07-00148A "17"" CPT NEW development panel" CLAA170EA02 BN07-00148B "17"" CPT ZPD panel code derivation" CLAA150XG09 BN07-00141B "CPT 15"" panel ZPD code derivation (GOYA-PJT)" CLAA150XP01 BN07-00173A CPT 15"...
  • Page 23 14 Reference Infomation Maker VENDOR P/N PANEL_CODE PANEL_ABB STICKER_CODE Remarks UNIPAC UM170E0 BN07-00028A Loaded by cisdba HYUNDAI HT15X13 BN07-00035A HYUNDAI HT17E11-200 BN07-00049A TN MODE HYUNDAI HT17E11-300 BN07-00093A HT17E11-300 ZPD panel HYUNDAI HT17E11-400 BN07-00094A HT17E11-400 normal panel HYUNDAI HT17E11-400 BN07-00095A HT17E11-400 ZPD panel code HYUNDAI HT17E12 BN07-00096A...
  • Page 24 14 Reference Infomation Memo 14-10...

  • Page 25: Product Specifications

    2 Product Specifications 2 Product Specifications 2-1 Fashion Feature - Develop Cost Effective Model - LCD Monitor Standardization/Develop Concept-leading Product - Develop New Design & Advanced Stand - Apply integrated GUI for the user's convenience 2-2 LHA19PS Specifications Item Description LCD Panel TFT-LCD panel, RGB vertical stripe, normally black transmissive, 19-Inch viewable, 0.294 (H) x 0.294 (V) mm pixel pitch...

  • Page 26: Option Specification

    2 Product Specifications 2-3 Option Specification Item Item Name CODE.NO Remark Quick Setup Guide BH68-00376L Warranty Card (Not available in all BH68-70438A locations) User's Guide, Monitor Driver, Natural Color software, BN59-00486G MagicTune¢â software MagicRotation software 'DVI-A to D-SUB' Cable BN39-00310B (3EA) Power Cord (3EA) 3903-000042...

  • Page 27: Circuit Descriptions

    13 Circuit Descriptions 13 Circuit Descriptions 13-1 Overall Block Structure Power Tree 13-1-1 1. When the AD board is in DPMS state: 1.1 The Scaler consumes power up to 27mA 1.2 The power to the panel is switched off 1.3 The MCU consumes power up to 23mA. -->...

  • Page 28: Main Board Parts

    13 Circuit Descriptions Main Board Parts 13-1-2 1. Inverter: A conversion device that converts DC 6. MCU & EEPROM: I2C is a two-way serial bus of rated voltage/current to high ones necessary two lines that supports communications across for the panel lamp. the integrated circuits as well as between MCU, Scaler and EEPROM.
  • Page 29 13 Circuit Descriptions 13-1-3 IP BOARD BLOCK(POWER) Parts 13-1-4 IP BOARD BLOCK( INVERTER ) Parts I P BO A RD BO A RD B LO C K B LO C K ( I N V N V ERT ER ERT ER ) I N V ERT V ERT ER ER PA RT...
  • Page 30 13 Circuit Descriptions 13-1-5 IP BOARD ( inverter ) PROTECTION Parts BIZET INVERTER CONTROLER FAN7310 have 2-way of the PROTECTION MODE. 1. OVP[Over Voltage Protection] : If the Voltage of the series capacitors C10 & C15 is over the 2.0V, the Inverter latched-off.[See the Picture1] 2.

  • Page 31: Troubleshooting

    13 Circuit Descriptions 13-2 Trouble Shooting 13-2-1 IP BOARD(Power) Power On Change FUSE Check fuse 3 pin of FDM0565R Check the Vcc system Vcc system in normal: HIGH 1 pin of FDM0565R Check the drain system Check the main switching Normal: Switching Check the Check the...
  • Page 32 13 Circuit Descriptions 13-2-2 IP BOARD(Inverter) Power On Check the power system Check the IC drive 1 and 2 pins of FDM0565R Check MOSFET Check Protection Normal:0.6V~0.8V 1 and 2 pins of FDM0565R Check the OVP and OLR Check Protection circuits Normal:0.6V~0.8V Check any dimming...

  • Page 33: Ip Board(Power) Schematic Diagrams

    13 Circuit Descriptions 13-3 IP BOARD(Power) Schematic Diagrams 13-7...

  • Page 34: Ip Board(Inverter) Schematic Diagrams

    13 Circuit Descriptions 13-4 IP BOARD(Inverter) Schematic Diagrams 13-8...
  • Page 35 4 Troubleshooting 4 Troubleshooting ’ • • • • • • “ ” 4-1 No Power When pin4 of CN600 is 0V does proper DC 5V appear at Change IP Board. Pin 6.7 of CN600 separately? When pin1 of IC600 is 5V does proper DC 3.3V appear Check IC600 related circuit at Pin 3 of IC600...

  • Page 36: No Video (Analog)

    4 Troubleshooting 4-2 No Video (Analog) check signal cable connection and power Do X401,X901 oscillate Replace or check related circuit like as figure 1 properly? Is there R,G,B input at Check input part. R11,R106,R108,R117, R116,R115? Do Hsync,Vsync waveformgnal check input part appear at R147,R830,R142,R145 ? Does sync signal(figure 2,3) appear check IC400 and related circuit...
  • Page 37 4 Troubleshooting WAVEFORMS...

  • Page 38: No Video (Digital)

    4 Troubleshooting 4-3 No Video (Digital) check signal cable connection and power Do X401,X901 oscillate Replace or check related circuit like as figure 1 properly? Is there R,G,B input at check input part R126 ~ R131 like as figure 4,5,6? Is there waveform figure 7 check input part at R132,R133,R140,R141?
  • Page 39 4 Troubleshooting WAVEFORMS...
  • Page 40 4 Troubleshooting Memo...

  • Page 41: Alignments And Adjustments

    3 Alignments and Adjustments 3 Alignments and Adjustments This section of the service manual explains how to use the RS232 JIG. This function is needed for AD board change and program memory (IC110) change. 3-1 Required Equipment The following equipment is necessary for adjusting the monitor: •...

  • Page 42: Service Function Spec

    3 Alignments and Adjustments 3-6 Service Function Spec. 3-6-1 How to Display Service Function OSD 1. The value for brightness and contrast should be changed to zero. 2. Within 5 seconds, press the (Enter/Source) key. 3. Service function OSD will be displayed. If you want to disable the service function OSD, you will have to power off.
  • Page 43 3 Alignments and Adjustments 3-6-3 How to Control Service Function OSD • After change the panel or lamp, you must reset service function OSD. • The case of panel change After changeing the panel, press the menu key within 5 seconds,. Then, panel Ch.

  • Page 44: How To Execute Ddc

    3 Alignments and Adjustments 3-7 How to execute DDC 1. Open file. 2. Select Port #1. 3. Select DDC file. 4.Click, "Next" Button 5. Type in the monitor serial number and press Enter. *Repeat this step 2 to 5 times in digital inputs after the analog input.

  • Page 45: Electrical Parts List

    6 Electrical Parts List 6 Electrical Parts List -You can search for updated part codes through ITSELF web site. URL : http://itself.sec.samsung.co.kr/ 6-1 LS19HAPNSQ/EDC Parts list Level Loc. No. Code No. Description & Specification SA/SNA LS19HAPNSQ/EDC 940FN,SGT9/S19B0-LHA,19,LCD-MO,NETHERLAN M0002 BN90-00781N ASSY COVER REAR;LS19HAPASQ/EDC S.N.A...
  • Page 46 6 Electrical Parts List Level Loc. No. Code No. Description & Specification Q'ty SA/SNA ..4 ZD119 0403-001411 DIODE-ZENER;-,5.49-5.73V,200MW,SOD-323,T ..4 ZD110 0406-001061 DIODE-TVS;MMQA5V6T3,5.32/5.6/5.88V,24W,S ..4 ZD111 0406-001061 DIODE-TVS;MMQA5V6T3,5.32/5.6/5.88V,24W,S ..4 ZD200 0406-001061 DIODE-TVS;MMQA5V6T3,5.32/5.6/5.88V,24W,S ..4 D106 0406-001217 DIODE-TVS;NUP4301MR6,6/-/-V,500W,TSOP-6 ..4 D107 0406-001217 DIODE-TVS;NUP4301MR6,6/-/-V,500W,TSOP-6 ..4 D108 0406-001217 DIODE-TVS;NUP4301MR6,6/-/-V,500W,TSOP-6 ..4...
  • Page 47 6 Electrical Parts List Level Loc. No. Code No. Description & Specification Q'ty SA/SNA ..4 R410 2007-000072 R-CHIP;47ohm,5%,1/10W,TP,1608 ..4 R411 2007-000072 R-CHIP;47ohm,5%,1/10W,TP,1608 ..4 R412 2007-000072 R-CHIP;47ohm,5%,1/10W,TP,1608 ..4 R413 2007-000072 R-CHIP;47ohm,5%,1/10W,TP,1608 ..4 R414 2007-000072 R-CHIP;47ohm,5%,1/10W,TP,1608 ..4 R415 2007-000072 R-CHIP;47ohm,5%,1/10W,TP,1608 ..4 R416 2007-000072 R-CHIP;47ohm,5%,1/10W,TP,1608 ..4...
  • Page 48 6 Electrical Parts List Level Loc. No. Code No. Description & Specification Q'ty SA/SNA ..4 R248 2007-000074 R-CHIP;100ohm,5%,1/10W,TP,1608 ..4 R249 2007-000074 R-CHIP;100ohm,5%,1/10W,TP,1608 ..4 R250 2007-000074 R-CHIP;100ohm,5%,1/10W,TP,1608 ..4 R255 2007-000074 R-CHIP;100ohm,5%,1/10W,TP,1608 ..4 R256 2007-000074 R-CHIP;100ohm,5%,1/10W,TP,1608 ..4 R266 2007-000074 R-CHIP;100ohm,5%,1/10W,TP,1608 ..4 R267 2007-000074 R-CHIP;100ohm,5%,1/10W,TP,1608 ..4...
  • Page 49 6 Electrical Parts List Level Loc. No. Code No. Description & Specification Q'ty SA/SNA ..4 R124 2007-000092 R-CHIP;15Kohm,5%,1/10W,TP,1608 ..4 R125 2007-000092 R-CHIP;15Kohm,5%,1/10W,TP,1608 ..4 R163 2007-000092 R-CHIP;15Kohm,5%,1/10W,TP,1608 ..4 R164 2007-000092 R-CHIP;15Kohm,5%,1/10W,TP,1608 ..4 R158 2007-000093 R-CHIP;20Kohm,5%,1/10W,TP,1608 ..4 R167 2007-000093 R-CHIP;20Kohm,5%,1/10W,TP,1608 ..4 R603 2007-000102 R-CHIP;100Kohm,5%,1/10W,TP,1608 ..4...
  • Page 50 6 Electrical Parts List Level Loc. No. Code No. Description & Specification Q'ty SA/SNA ..4 C102 2203-005005 C-CER,CHIP;100nF,10%,16V,X7R,1608 ..4 C103 2203-005005 C-CER,CHIP;100nF,10%,16V,X7R,1608 ..4 C104 2203-005005 C-CER,CHIP;100nF,10%,16V,X7R,1608 ..4 C105 2203-005005 C-CER,CHIP;100nF,10%,16V,X7R,1608 ..4 C106 2203-005005 C-CER,CHIP;100nF,10%,16V,X7R,1608 ..4 C107 2203-005005 C-CER,CHIP;100nF,10%,16V,X7R,1608 ..4 C108 2203-005005 C-CER,CHIP;100nF,10%,16V,X7R,1608 ..4...
  • Page 51 ASSY SHIELD P-COVER;HA19Fn,SECC T0.8,2DV S.N.A ...3 BN63-01774A SHIELD-INSULATOR;BI17/19BS,PET,T0.35 S.N.A ...3 M0107 BN63-01974C SHIELD-COVER;HA19Fn,SECC,T0.8,398,222,2D S.N.A M0174 BN44-00124C IP BOARD;IP-35135B (H),BI17VS,3.0 ~4.0mA M2893 BN39-00664D LEAD CONNECTOR;LS19HAP(940FN),UL1571#30, M0081 6003-000334 SCREW-TAPTITE;RH,+,2S,M3,L6,ZPC(YEL),SWR S.N.A M0081 6003-000334 SCREW-TAPTITE;RH,+,2S,M3,L6,ZPC(YEL),SWR S.N.A M0081 6003-001439 SCREW-TAPTITE;BH,+,S,M4,L8,ZPC(YEL) S.N.A M0112 BN91-00950E ASSY SHIELD;LS19HAP* S.N.A...
  • Page 52 6 Electrical Parts List Level Loc. No. Code No. Description & Specification Q'ty SA/SNA T0376 6902-000379 BAG AIR;LDPE,T0.2,W1000,L1800,TRP,-,-- 0.002 S.N.A T0524 6902-000520 BAG PE;HDPE/NITRON(DOUBLE),T0.015/T0.5(D S.N.A 6902-000604 BAG WRAPPING;LDPE,T0.02,W500,L10000,TRP, 1.51 S.N.A M0081 6902-000609 BAG ROLL;LDPE,T0.05,W2400,L1000,TRP,-,- S.N.A...

  • Page 53: Exploded View And Parts List

    5 Exploded View & Parts List 5 Exploded View and Parts List -You can search for updated part codes through ITSELF web site. URL : http://itself. sec. samsung.co.kr 5-1 Exploded View M0112 T0077 M0107 M0174 T0022 T0145 T0003 M0215 M0006...

  • Page 54: Parts List

    5 Exploded View & Parts List 5-2 Parts List Location Code.No Item & Specification Q'ty SA/SNA Remark T0003 BN96-02239C ASSY COVER P-FRONT;HA19Fn,ABS HB,GR70,SI M0112 BN63-01967B COVER-FRONT;HA19TS,ABS,T1.5,403.2,331.9, T0022 BN64-00377B KNOB CONTROL;HA17TS,PC CLEAR,T2.1,9,112, M0145 BN96-02474C ASSY BOARD P-FUNCTION;HAYDN,YWP-VD-05-05 M0215 BN07-00224A LCD-PANEL;M190EN03,Matisse,8BIT,396*324* M0006 BN63-02254A COVER-REAR;HA19Fn,HIPS,2.0,HB,BK24,2 DVI M0107...

  • Page 55: Block Diagram

    7 Block Diagrams 7 Block Diagram 7-1 Power Tree...

  • Page 56: Main Board Part

    7 Block Diagrams 7-2 Main Board Part...

  • Page 57: Ip Board Part (Smps Part)

    7 Block Diagrams 7-3 IP Board Part (SMPS Part)

  • Page 58: Ip Board Part (Inverter Part)

    7 Block Diagrams 7-4 IP Board Part (Inverter Part)

  • Page 59: Wiring Diagram

    8 Wiring Diagram 8 Wiring Diagram...
  • Page 60 8 Wiring Diagram Memo...

  • Page 61: Safety Precautions

    1 Precautions 1 Precautions Follow these safety, servicing and ESD precautions to prevent damage and to protect against potential hazards such as electrical shock. 1-1 Safety Precautions 1-1-1 Warnings For continued safety, do not attempt to modify the circuit board. Disconnect the AC power and DC power jack before servicing.

  • Page 62: General Servicing Precautions

    1 Precautions 1-2 Servicing Precautions WARNING: An electrolytic capacitor installed with the wrong polarity might explode. Caution: Before servicing units covered by this service manual, read and follow the Safety Precautions section of this manual. Note: If unforeseen circumstances create conflict between the following servicing precautions and any of the safety precautions, always follow the safety precautions.

  • Page 63: Installation Precautions

    1 Precautions 1-4 Installation Precautions 1. For safety reasons, more than two people are 6. Keep the antenna far away from any high-voltage required for carrying the product. cables and install it firmly. Contact with the high- voltage cable or the antenna falling over may 2.
  • Page 64 1 Precautions Memo...
  • Page 65 9 Schematic Diagrams 9 Schematic Diagrams - This Document can not be used without Samsung s authorization. 9-1 Schematic Diagrams...
  • Page 66 9 Schematic Diagrams...

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