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Dell E178WFPC Service Manual

17" lcd color monitor
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17" LCD Color Monitor
Service
Service
Service
Table Of Contents..........................................................1
Revision List..................................................................2
Important Safety Notice................................................3
1.Monitor Specifications.................................................4
2.LCD Monitor Description........................................5
3.Operation Instructions...............................................6
3.1.General Instructions...........................................6
3.2.Control Buttons...................................................7
3.3 Adjusting the Picture..............................................9
4. Input/Output Specification.......................................16
4.1.Input Signal Connector.........................................16
4.2.Factory Preset Display Modes.................................17
4.3.Power Supply Requirements...................................17
4.4.Panel Specification............................................18
4.5.Definition of Pixel Defects.....................................20
5.Block Diagram.........................................................21
5.1.Software Flow Chart...........................................21
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

Table of Contents

Page Description
5.2.Electrical Block Diagram...................................23
6. Mechanical Instructions.............................................25
7. Schematic Diagram................................................30
7.1 Main Board............................................................30
7.2 Power Board...................................................34
8. PCB Layout...............................................................36
8.1. Main Board..........................................................36
8.2. Power Board........................................................39
8.3. Key Board..........................................................42
9. Maintainability.....................................................43
9.1.Equipments and Tools Requirement......................43
9.2.Trouble Shooting.................................................44
11.ISP Instruction.......................................................51
12. Monitor Exploded View.....................................55
13. BOM List................................................................56
14. Different Parts List...........................................66
SAFETY NOTICE
1
Dell E178WFPC
Horizontal Frequency
30 kHz to 83 kHz
Page

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  Summary of Contents for Dell E178WFPC

  • Page 1: Table Of Contents

    17" LCD Color Monitor Dell E178WFPC Service Service Service Horizontal Frequency 30 kHz to 83 kHz Table of Contents Description Page Description Page Table Of Contents..……....……...…..1 5.2.Electrical Block Diagram………………..…..…..23 Revision List.…......………....……..2 6. Mechanical Instructions…..........25 Important Safety Notice.….……….…....……..3 7. Schematic Diagram………………......30 1.Monitor Specifications..…......………..4...
  • Page 2: Revision List

    17" LCD Color Monitor Dell E178WFPC Revision List Revision Release Date Revise history TPV model T77GMRHKPWDLNN Jun.-18-2007 Initial Release T77HMRHKPWDLNN...
  • Page 3: Important Safety Notice

    17" LCD Color Monitor Dell E178WFPC Important Safety Notice Proper service and repair is important to the safe, reliable operation of all AOC Company Equipment. The service procedures recommended by AOC and described in this service manual are effective methods of performing service operations.
  • Page 4: Monitor Specifications

    17" LCD Color Monitor Dell E178WFPC 1. Monitor Specifications Screen type Active matrix - TFT LCD Panel Type LM171WX3-TLA1 KR ZBD LPL Size 17 inches (17-inch diagonal viewable image size) LCD Panel 0.255 mm x 0.255 mm Pixel pitch Viewing angle 160° (vertical) typ, 150° (horizontal) typ...
  • Page 5: Lcd Monitor Description

    17" LCD Color Monitor Dell E178WFPC 2. LCD Monitor Description The LCD monitor will contain a main board, power board, key board, which house the flat panel control logic, brightness control logic and DDC. The power board will provide AC to DC Inverter voltage to drive the backlight of panel and the main board chips each voltage.
  • Page 6: Operation Instructions

    17" LCD Color Monitor Dell E178WFPC 3. Operation instructions 3.1 General Instructions 1. With the menu off, press the MENU button to open the OSD system and display the main features menu. Function icons Main Menu C Menu icon Sub-Menu name Resolution 2.
  • Page 7: Control Buttons

    17" LCD Color Monitor Dell E178WFPC 3.2 Control Buttons Menu selection button Brightness Contrast / Down(-) button Auto-Adjust / Up(+) button Power On/Off button with LED indicator The 'MENU' button is used to open the on-screen display (OSD), select function icons, exit from menus and sub-menus, and to exit the OSD.
  • Page 8 17" LCD Color Monitor Dell E178WFPC Use this button to activate automatic setup and adjustment. The following dialog will appear on screen as the monitor self-adjusts to the current input: Auto Adjust Auto Adjust In Progress Auto Adjustment button allows the monitor to self-adjust to the incoming video signal.
  • Page 9: Adjusting The Picture

    17" LCD Color Monitor Dell E178WFPC necessary. "+" increase 'brightness' " - "decrease 'brightness' The 'Contrast' function adjusts the degree of difference between darkness and lightness on the display screen. "+" increase the 'contrast' "-" decrease the 'contrast' 3.3 Adjusting the Picture...
  • Page 10 17" LCD Color Monitor Dell E178WFPC hotkey. The Phase and Pixel Clock adjustments allow you to more closely adjust your Pixel Clock monitor to your preference. Select Image Settings in the main OSD to access these settings. Use the - and + buttons to adjust interference. Minimum: 0 ~ Maximum: 100...
  • Page 11 17" LCD Color Monitor Dell E178WFPC As soon as choose Graphics, you can choose Normal Preset, Red Preset, Blue Preset or User Preset. Select Red Preset for a warm color. Select Blue Preset for a cool color. You can adjust the monitor color using User Preset, R, G, B.Normal Preset mean color temperature 6500K.
  • Page 12 17" LCD Color Monitor Dell E178WFPC OSD Hold Time The OSD stays active for as long as it is in use. 'OSD Hold Time': Sets the length of time the OSD will remain active after the last time you pressed a button.
  • Page 13 17" LCD Color Monitor Dell E178WFPC Exit is used to exit out of Factory Reset menu. For All settings, all user adjustable settings are reset at one time except Language settings. IR — This feature will help reduce minor cases of image retention.
  • Page 14: Automatic Save

    17" LCD Color Monitor Dell E178WFPC Select Disable to disable this feature. For best user experience and optimum performance of your monitor, keep this feature enabled. NOTE: If user select 'disable' for DDC/CI, the warning message will appear on screen. Then user can select Yes or No according to need.
  • Page 15 See Specifications for the Horizontal and Vertical frequency ranges addressable by this monitor. Recommended mode is 1440 X 900 @ 60Hz. NOTE: The floating 'Dell - self-test Feature Check' dialog appears on the screen if the monitor cannot sense a video signal.
  • Page 16: Input/Output Specification

    17" LCD Color Monitor Dell E178WFPC 4. Input/Output Specification 4.1 Input Signal Connector VGA Connector: Pin No. Description Pin No. Description Video-Red Computer 5V/3.3V Video-Green GND-sync Video-Blue DDC data Self-test H-sync GND-R V-sync GND-G DDC clock GND-B VGA Connector layout...
  • Page 17: Factory Preset Display Modes

    17" LCD Color Monitor Dell E178WFPC 4.2 Factory Preset Display Modes Display Mode Horizontal Vertical Pixel Sync Polarity Frequency Frequency Clock (kHz) (Hz) (MHz) (Horizontal/Vertical) VGA, 720 x 400 31.5 70.1 28.3 VGA, 640 x 480 31.5 60.0 25.2 VESA, 640 x 480 37.5...
  • Page 18: Panel Specification

    17" LCD Color Monitor Dell E178WFPC 4.4 Panel Specification HSD170MGW1-B00 ZBD NJ HSD 4.4.1 Display Characteristics Active Screen Size 17.1 inches(43.3019cm) diagonal (Aspect ratio 16:10) Outline Dimension 389.2(H)x254.5(V)x11.5(D) mm (Typ.) Pixel Pitch 0.255mm x 0.255mm Pixel Format 1440 horiz. By 900 vert. Pixels RGB strip arrangement Color Depth 16.7M colors...
  • Page 19 17" LCD Color Monitor Dell E178WFPC 4.4.2 Optical Characteristics The optical characteristics are measured under stable conditions at 25 ℃ (Room Temperature): Ta= 25±2°C, V =5.0V, fV=60Hz, Dclk=106.5MHz, ILamp=8mA...
  • Page 20: Definition Of Pixel Defects

    17" LCD Color Monitor Dell E178WFPC 4.5 Definition of Pixel Defects 4.5.1 Inspection environment conditions: ◆ Room temperature: 20 ~ 25 C ◆ Humidity: 65 ± 5% RH. ◆ Illumination: Fluorescent light (Day-Light Type) display surface illumination to be 300 ~ 700 Lux. (standard 500Lux.)
  • Page 21: Block Diagram

    17" LCD Color Monitor Dell E178WFPC 5. Block Diagram 5.1 Software Flow Chart...
  • Page 22 17" LCD Color Monitor Dell E178WFPC 1) MCU Initializes. 2) Is the EEprom blank? 3) Program the EEprom by default values. 4) Get the PWM value of brightness from EEprom. 5) Is the power key pressed? 6) Clear all global flags.
  • Page 23: Electrical Block Diagram

    17" LCD Color Monitor Dell E178WFPC 5.2 Electrical Block Diagram 5.2.1 Main Board Crystal LCD Interface 14.318MHZ (CN301) (X201) Flash Memory Scalar TSUM16AWR-LF-1 SST25LF020A-33-4C-SAE (Include MCU, ADC, OSD) (U203) (U401) DB15_SDA, DB15_SCL OSD Control Interface D-Sub EEPROM M24C02 (CN201) Connector...
  • Page 24 17" LCD Color Monitor Dell E178WFPC 5.2.2 Inverter and Power Board AC input Bridge Rectifier Transformer Rectifier diodes EMI filter and Filter Start Circuit R904, R932, R933 Feedback Over Circuit Voltage Protect Control IC ON/OFF Output MOSFET Transformer Circuit Lamp...
  • Page 25: Mechanical Instructions

    17" LCD Color Monitor Dell E178WFPC 6. Mechanical Instructions Tools: 2 Power screwdrivers (φ=5mm,L=60mm); 1 small cross screwdriver; turnbuckle driver; Setting: Power screwdriver torque A=11 kgF. Cm; torque B=6 kgF. Cm Note: Firstly, put the monitor on a soft, flat and clean surface, wear gloves.
  • Page 26 17" LCD Color Monitor Dell E178WFPC 3. Turn over the monitor as the Fig, hold the rear cover, and then slightly remove it. Remove the small shield: Remove the small shield as the arrowhead direction, disconnects the keyboard connector, and then remove the bezel.
  • Page 27 17" LCD Color Monitor Dell E178WFPC Remove the two screws by Torque Remove the main frame: Remove the 4 screws by manual or torque = 3kgF.Cm and remove the main frame Install: Fix the FFC connector as the figure. Note: Make LVDS connector’s metal side adown .
  • Page 28 17" LCD Color Monitor Dell E178WFPC Remove the Boards: Remove the seven screws by Torque B and remove the Power Board and Main Board. Screw pillar Ground cable Install: The ground cable should be laid above the other two cables and below the screw pillar.
  • Page 29 17" LCD Color Monitor Dell E178WFPC The end 45℃ Install: The angle between CCFL line and vertical direction should be 45 degree.
  • Page 30: Schematic Diagram

    17" LCD Color Monitor Dell E178WFPC 7. Schematic Diagram 7.1 Main Board R101 0R05 1/16W R102 100R 1/16W DSUB_H R103 100R 1/16W FB102 DSUB_V 2K2 1/16W VGA_B+ R104 100R 1/16W C101 DSUB_B+ R105 R106 C102 C103 BEAD 0.047uF ZD101 ZD102 2K2 1/16W UDZS5.6B...
  • Page 31 17" LCD Color Monitor Dell E178WFPC VDDC AVDD VDDP VDDP VCC3.3 FB203 AVDD VCC3.3 600 OHM VCTRL C202 C203 C207 0.1uF 16V 0.1uF 16V LVA3P 4.7uF16V DSUB_R+ RIN0P LVA3M DSUB_R- RIN0M DSUB_G+ GIN0P DSUB_G- GIN0M LVA2P DSUB_SOG SOGIN0 LVA2M DSUB_B+...
  • Page 32 17" LCD Color Monitor Dell E178WFPC PA[0..9] PA[0..9] PANEL_VCC CN301 LVA3P LVA3M LVA2P LVA2M LVA1P C302 0.1uF 16V LVA1M LVA0P LVA0M R302 LVA3P 330R 1/8W 5% LVA3M LVBCKP LVBCKM LVA2P LVA2M LVA1P LVA1M PB[0..9] LVA0P PB[0..9] LVB3P LVA0M LVB3M LVB3P...
  • Page 33 17" LCD Color Monitor Dell E178WFPC 3/16 VCC3.3 BAT54C : IF 10mA,VF=0.4V BAV70 IF 10mA,VF=0.855V(drop voltage too much) VCC3.3 VCC3.3 CN401 BAT54C VCC1.8 MVCC D106 U702 R401 R403 CMVCC R402 3.3Ω 2W 10K 1/16W 10K 1/16W CMVCC C403 CMVCC BKLT-EN...
  • Page 34: Power Board

    17" LCD Color Monitor Dell E178WFPC 7.2 Power Board   1/4W R918 L904 R941 R945 1K 1/4W 1K 1/4W +12V   1/4W R919 1.1uH BD901 C912 C922 KBP208G 0.001uF 470uF/25V ZD902 C930   1/4W R920 R944 RLZ13B R946 0.1uF C917...
  • Page 35 17" LCD Color Monitor Dell E178WFPC CN801 C839 T801 1000pF POWER X'FMR R817 R821 10K 1/10W 1K 1/10W 1% R855 D805 CONN 1/4W   LL4148WP C819 FB801 F801 0.0022uF +12V C801 15pF/3KV BEAD 0R05 1/4W C802 R804 Q801 470uF/25V C824...
  • Page 36: Pcb Layout

    17" LCD Color Monitor Dell E178WFPC 8. PCB Layout 8.1 Main Board...
  • Page 37 17" LCD Color Monitor Dell E178WFPC...
  • Page 38 17" LCD Color Monitor Dell E178WFPC...
  • Page 39: Power Board

    17" LCD Color Monitor Dell E178WFPC 8.2 Power Board...
  • Page 40 17" LCD Color Monitor Dell E178WFPC...
  • Page 41 17" LCD Color Monitor Dell E178WFPC...
  • Page 42: Key Board

    17" LCD Color Monitor Dell E178WFPC 8.3 Key Board...
  • Page 43: Maintainability

    17" LCD Color Monitor Dell E178WFPC 9. Maintainability 9.1 Equipments and Tools Requirement 1. Voltage meter 2. Oscilloscope 3. Pattern Generator 4. LCD Color Analyzer 5. Service Manual 6. User Manual...
  • Page 44: Trouble Shooting

    17" LCD Color Monitor Dell E178WFPC 9.2 Trouble shooting 9.2.1 Main Board No power No power Press power key and look if the picture is normal Please reinsert and make sure the AC of 100-240 is normal Reinsert or check the...
  • Page 45 17" LCD Color Monitor Dell E178WFPC No picture (LED orange) No picture Measure U701 PIN2=3.3V U702 PIN2=1.8V Replace U701, U702 X201 oscillate waveform is normal Replace X201 Whether the reset of the Scalar IC is useful? Check C407, C227, R219...
  • Page 46 17" LCD Color Monitor Dell E178WFPC White screen White screen Measure Q301 base X201 oscillate waveform is normal is low level? Replace X201 Check Q302 is broken or Check reset circuit of CN301 solder? U401 is normal Check Correspondent Check Correspondent component.
  • Page 47 17" LCD Color Monitor Dell E178WFPC 9.2.2 Power/Inverter Board No power Check CN902 pin3, 4 = 5V Check AC line volt 110V or 220V Check AC input Check the voltage of C907(+) Check bridge rectified circuit and F901 circut Check start voltage for the pin3 of IC901...
  • Page 48 17" LCD Color Monitor Dell E178WFPC No Backlight Check F801=12V Check adapter and F801 Check ON/OFF signal Check Interface board or main board Check IC801 PIN12=5V Change on/off circuit Check IC801 PIN1 have triangle wave Change IC801 Check ZD801 has the output of square wave at short time.
  • Page 49 17" LCD Color Monitor Dell E178WFPC 9.2.3 Keypad Board OSD is unstable or not working Is Key Pad Board connecting normally? Connect Key Pad Board Replace Button Switch Is Button Switch normally? Is Key Pad Board normally? Replace Key Pad Board...
  • Page 50: White-Balance, Luminance Adjustment

    17" LCD Color Monitor Dell E178WFPC 10. White balance, Luminance adjustment Approximately 2 Hours should be allowed for warm up before proceeding White-Balance adjustment. Before started adjust white balance, please setting the Chroma-7120 MEM. Channel 3 to 6500 K colors, MEM.
  • Page 51: Isp Instruction

    17" LCD Color Monitor Dell E178WFPC 11. ISP Instruction Configure and procedure It is a windows-based program, which cannot be run in MS-DOS. System and equipment requirements (1). An i486 (or above) personal computer or computer or compatible. (2). Microsoft operation system Window 95/98/2000/XP.
  • Page 52 17" LCD Color Monitor Dell E178WFPC Step 2: Click OK and click Read, select program Bin file, bring up Fig.3 Fig.3...
  • Page 53 17" LCD Color Monitor Dell E178WFPC Step3: Click open and OK, bring up Fig.4 and Fig.5 Fig.4 Fig.5...
  • Page 54 17" LCD Color Monitor Dell E178WFPC Step 4: Click Auto and Run, bring up Fig.6 Fig.6 Step 5: When appear Verify OK, writer finished as shown Fig.7 Fig.7...
  • Page 55: Monitor Exploded View

    17" LCD Color Monitor Dell E178WFPC 12. Exploded View...
  • Page 56: Bom List

    17" LCD Color Monitor Dell E178WFPC 13. BOM List T77GMRHKPWDLNN Location Part Number Description 023G3178700 3A LOGO 026G 800700 6A S/N LABEL 044G9000 7A PAPER BOARD 044G9003100 CORNER PAPER 044G9003119 CORNER PAPER 052G 1186 SMALL TAPE 052G6022 1500 SMALL TAPE...
  • Page 57 17" LCD Color Monitor Dell E178WFPC C202 067G305V479 3P 4.7UF 16V 105℃ C209 067G305V479 3P 4.7UF 16V 105℃ CN101 088G 35315F H D-SUB 15PIN X201 093G 22 53 CRYSTAL 14.318MHZHC-49US U401 056G 562548 IC TSUM16AWR-LF-1 MSTAR U702 056G 563 27...
  • Page 58 17" LCD Color Monitor Dell E178WFPC R301 061G0402103 RST CHIPR 10 KOHM +-5% 1/16W R232 061G0402103 RST CHIPR 10 KOHM +-5% 1/16W R227 061G0402103 RST CHIPR 10 KOHM +-5% 1/16W R226 061G0402103 RST CHIPR 10 KOHM +-5% 1/16W R223 061G0402103...
  • Page 59 17" LCD Color Monitor Dell E178WFPC C229 065G0402104 12 CHIP 0.1UF 50V X7R C228 065G0402104 12 CHIP 0.1UF 50V X7R C219 065G0402104 12 CHIP 0.1UF 50V X7R C218 065G0402104 12 CHIP 0.1UF 50V X7R C212 065G0402104 12 CHIP 0.1UF 50V X7R...
  • Page 60 17" LCD Color Monitor Dell E178WFPC ZD106 093G 39S 34 T UDZS5.6B ZD105 093G 39S 34 T UDZS5.6B ZD104 093G 39S 34 T UDZS5.6B ZD103 093G 39S 34 T UDZS5.6B ZD102 093G 39S 34 T UDZS5.6B ZD101 093G 39S 34 T UDZS5.6B...
  • Page 61 17" LCD Color Monitor Dell E178WFPC D905 093G3006 1 1 31DQ06FC3 NIHON INTER CN902 095G8014 6D655 WIRE HARNESS 705GQ757006 Q901 ASS'Y Q901 057G 724 11 STP9NK65ZFP 0M1G1730 8128 CR3 SCREW Q90G6263 3 HEAT SINK 705GQ793027 D906 ASS'Y D906 093G 60294...
  • Page 62 17" LCD Color Monitor Dell E178WFPC R813 061G0603102 RST CHIP 1K 1/10W 5% R862 061G0603105 RST CHIPR 1 MOHM +-5% 1/10W R835 061G0603105 RST CHIPR 1 MOHM +-5% 1/10W R803 061G0603106 RST CHIPR 10 MOHM +-5% 1/10W R930 061G0603243 1F RST CHIPR 2.43 KOHM +-1% 1/10W...
  • Page 63 17" LCD Color Monitor Dell E178WFPC R946 061G1206102 RST CHIPR 1 KOHM +-5% 1/4W R912 061G1206221 RST CHIPR 220 OHM +-5% 1/4W R904 061G1206304 300 KOHM 1/8W R933 061G1206304 300 KOHM 1/8W R932 061G1206304 300 KOHM 1/8W R855 061G1206330 RST CHIPR 33 OHM +-5% 1/4W...
  • Page 64 17" LCD Color Monitor Dell E178WFPC D812 093G 64 44 S LL4148WP D807 093G 64 44 S LL4148WP D806 093G 64 44 S LL4148WP D805 093G 64 44 S LL4148WP D813 093G 64 44 S LL4148WP ZD801 093G 39S 10 T RLZ6.8B LLDS...
  • Page 65 Q44GSLIP10046A PLASTIC SLIPSHEET Q45G 88606 8 PE BAG FOR BASE Q45G 88607DE8 PE BAG FOR MONITOR Q50G 505 17 BAND Q52G 1185 86 BIG TAPE FOR DELL CARTON Q52G6020 46 PROTECT FILM Q70G1700700 8A CD MANUAL Q85G0051 1 INVERTER SHIELD...
  • Page 66: Different Parts List

    17" LCD Color Monitor Dell E178WFPC 14. Different Parts List Diversity of T77HMRHKPWDLNN compared with T77GMRHKPWDLNN Location Part No. Description 705GQ734170 MAIN FRAME ASS'Y(17") Q15G0212 1 MAINFRAME 750GLH70GWB12Z000D PANEL HSD170MGW1-B00 ZBD NJ HSD CBPC7HMRDLQ1 MAIN BOARD PWPC721HD1 POWER BOARD 044G3231 15571...