Acer AL1706 Service Manual Download Page 35 | Manualshive

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35

3.Interface Board Troubleshooting

3.1

Black Screen and backlight turn on

MCU Fail

Black screen

Check pin5 of

CN101

Check CCFL-

Enable(pin3)

of U105

Check crystal(pin20,21)

waveform of U105

Check reset (pin 10)

of U105

Check pin30,31,35,44

of U105(MCU)

Check power

supply:pin 1,2 of

CN101

Check

R105,R106,R157,

C114,Q103

Inverter Fail

Check

X101,C154,C155

Check

C150,D102,R137

Check

FB108,R131,R132,

R133

Power fail

NG

NG

NG

NG

NG

NG

YES

YES

YES

YES

YES

YES

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Summary of Contents for AL1706

Page 1: ...1 Acer AL1706 Service Guide ...

Page 2: ...ect to the contents hereof and specifically disclaims any warranties of merchantability or fitness for any particular purpose Any Acer Incorporated software described in this manual is sold or licensed as is Should the programs prove defective following their purchase the buyer and not Acer Incorporated its distributor or its dealer assumes the entire cost of all necessary servicing repair and any...

Page 3: ...bits and pieces of additional information related to the current topic WARNING Alerts you to any damage that might result from doing or not doing specific actions CAUTION Gives precautionary measures to avoid possible hardware or software problems IMPORTANT Reminds you to do specific actions relevant to the accomplishments of procedures ...

Page 4: ...ll NOT be covered in this generic service guide In such cased please contact your regional offices or the responsible personnel channel to provide you with further technical details 2 Please not WHEN ORDER FRU PARTS that you should check the most up to date information available on your regional web or channel If for whatever reason a part number change is made it will not be noted in the printed ...

Page 5: ...to try to correct the interference by one or more of the following measures 1 Reorient or relocate the receiving antenna 2 Increase the separation between the equipment and receiver 3 Connect the equipment into an outlet on a circuit different from that to which the receiver is connected 4 Consult the dealer or an experienced radio TV technician for help Notice 1 The changes or modifications not e...

Page 6: ...NING To prevent fire or shock hazard do not expose the monitor to rain or moisture Dangerously high voltages are present inside the monitor Do not open the cabinet Refer servicing to qualified personnel only ...

Page 7: ...r use an adapter to ground the appliance safely Do not defeat the safety purpose of the grounded plug Unplug the unit during a lightning storm or when it will not be used for long periods of time This will protect the monitor from damage due to power surges Do not overload power strips and extension cords Overloading can result in fire or electric shock Never push any object into the slot on the m...

Page 8: ...8 the same image is displayed for hours In this case the screen is recovered slowly by changing the image or turning off the Power Switch for hours ...

Page 9: ...rating Instruction 20 Front Bezel Control Adjusting the Monitor How to Optimize the DOS Mode Chapter 3 Machine Assembly 27 Chapter 4 Troubleshooting 31 Common Acknowledge Interface Board Troubleshooting QPI PCBA Troubleshooting Chapter 5 Connector Information 40 VGA Connector Pin Assignment Chapter 6 FRU Field Replaceable Unit 42 Exploded Diagram Part List Chapter 7 Schematic Diagram 43 Table of C...

Page 10: ...ncy 56Hz to 75Hz Display Color 6bits FRC Dot Clock 80MHz Max Resolution 1024 x 768 75Hz Plug Play VESA DDC 1 2B EPA ENGERGY STAR ON MODE 35W OFF MODE 1W Input Connector D Sub 15pin Three Pronged Pin Input Video Signal Analog 0 7Vp p Standard 75 OHM Positive Analog Only Model Maximum Screen Size Horizontal 338 mm Vertical 270 mm Power Source 100 240VAC 50 60Hz Environmental Considerations Operating...

Page 11: ... TIMING TABLE Standard Resolution Horizontal Frequency KHz Vertical Frequency Hz 640 x 480 31 469 60 000 640 x 480 37 861 72 809 VGA 640 x 480 37 500 75 000 800 x 600 35 156 56 250 800 x 600 37 879 60 317 800 x 600 48 077 72 188 SVGA 800 x 600 46 875 75 000 1024 x 768 48 363 60 004 1024 x 768 56 476 70 069 XGA 1024 x 768 60 023 75 029 1280 x 1024 63 981 60 020 SXGA 1280 x 1024 79 976 75 025 640 x ...

Page 12: ...panel 2 Power inverter board Provide power to interface board and panel 3 Keypad board For user to control the LCD monitor 4 Flat panel Inverter Power BD Including AC DC Power Supply and Inverter Interface Board VGA input Keypad BD Flat panel LVDS interface and CCFL AC input Range 90V 264V Host computer VGA signal input and DDC ...

Page 13: ...13 MAIN BOARD DIAGRAM MCU SCL SDA DDC Interface Board Red Green Blue Vsync Hsync A D Scaling OSD To LCD module EEPROM ...

Page 14: ... 4 Get the user value and mode setting from EEProm 5 Are the factory key pressed 6 Enter factory mode 7 Check the analog port are there any signal coming 8 Display No Signal message 9 Enter sleep mode 10 Wake up the scalar 11 Program the scalar to be able to show the coming mode 12 Turn on the LED and set it to green color 13 Process the OSD display 14 Read the keyboard Is any key pressed ...

Page 15: ...15 MONITOR INTERFACE BOARD PCB LAYOUT ...

Page 16: ...ctor CN101 Connector to power BD U102 5V to 1 8V regulator X102 Crystal to scaler U104 Scaler TSU16AK U105 MCU Winbond CN102 D sub connector U103 DDC U106 EEPROM X101 Crystal to MCU CN105 Connector to control BD U101 5V to 3 3V regulator ...

Page 17: ...17 FRONT BEZEL ITEM DESCRIPTION 1 Power Tack Switch 2 Menu Enter 3 Up 4 Down 5 Auto Exit 5 4 3 2 1 ...

Page 18: ...18 REAR BEZEL ITEM DESCRIPTION 1 Three pronged power cord 2 VGA Cable with blue connector compliance with PC99 1 2 ...

Page 19: ... the front of the monitor By changing these settings the picture can be adjusted to your personal preferences The power cord should be connected Connect the video cable from the monitor to the VGA Card Press the power button to turn on the monitor the power indicator will light up Front Panel Control Chapter 2 5 4 3 2 1 ...

Page 20: ... When OSD menu is in off status press this button for 2seconds to activate the Auto Adjustment which is used to set the H Pos V Pos Clock and Phase NOTES Do not install the monitor in a location near heat sources such as radiators or air ducts or in a place subject to direct sunlight or excessive dust or mechanical vibration or shock Save the original shipping carton and packing materials as they ...

Page 21: ...ent Range Reset Value Contrast Contrast from digital register 0 100 50 Brightness Backlight Adjustment 0 100 100 Phase Adjust picture phase to reduce horizontal line noise 0 100 Do auto config Clock Adjust picture clock to reduce vertical line noise 0 100 Do Auto Config H Position Adjust picture horizontal position 0 100 Do Auto Config ...

Page 22: ...e to Traditional Chinese N A Deutsch N A Set OSD language to German N A Francais N A Set OSD language to French N A Espanol N A Set OSD language to Spain N A Italiano N A Set OSD language to Italian N A 簡體中文 N A Set OSD Language to Simplified Chinese N A 日本語 N A Set OSD language to Japanese N A English H Position Adjust OSD horizontal position 0 100 50 V Position Adjust OSD vertical position 0 100...

Page 23: ...23 Exit N A Exit OSD N A N A ...

Page 24: ...tion Item Description No Signal When LCD Monitor power on but video cable is not connected will show this message then enter power saving 3 FACTORY MENU a How to call out Factory Menu At VGA in Push AUTO MENU and plug AC Power cord in sync b Outline ...

Page 25: ...s monitor meets the Green monitor standards as set by the Video Electronics Standards Association VESA and or the United States Environmental Protection Agency EPA and the Swedish Confederation Employees NUTEK This feature is designed to conserve electrical energy by reducing power consumption when there is no video input signal present When there is no video input signal this monitor following a ...

Page 26: ...s susceptible to scratching Therefore lay the monitor on a soft surface when mounting or removing the base 3 Wear gloves Chassis 1 Front bezel 1 Button 1 Indicator 1 Hinge cover 1 INL Panel 1 SCREW PW3x4 M ZN 4 FFC 30pin 1 TAPE ACE LP1701 40x20mm 1 INSULATOR PC LE1710 PCBA I F BOARD 1 CABLE 30P FFC HRN ASS Y 8P SCREW PW 3 6 M ZN 3 PCBA Power Board 1 INSULATOR PC MYLAR SCREW PW 3 6 M ZN 3 PCBA Cont...

Page 27: ...0pin 1 TAPE ACE LP1701 40x20mm 1 INSULATOR PC LE1710 PCBA I F BOARD 1 CABLE 30P FFC HRN ASS Y 8P SCREW PW 3 6 M ZN 3 EMI shield Tape 2 PCBA Power Board 1 INSULATOR PC MYLAR SCREW PW 3 6 M ZN 3 PCBA Control Board 1 SCREW PW 3 4 M ZN 2 Insert B L jack 4 ...

Page 28: ...28 Back cover 1 Arm Stand 1 M4x10 ZN 4 Stand plate 1 Rubber 4 Panel Module 1 Bracket Finger 1 M4x18 ZN 3 ...

Page 29: ...29 Front Bezel 1 Button 1 Indicator 1 Hinge Cover ...

Page 30: ...M is analog interface So if the entire screen is an abnormal color that means the problem happen in the analog circuit part if only some scale appears abnormal color that stand the problem happen in the digital circuit part If you check the H V position please use the crosshatch pattern This LCM support 20 timing modes if the input timing mode is out of specification the picture appears abnormally...

Page 31: ...k pin1 of IC802 voltage is 5 8V END Check circuit if short Check R812 R816 C818 Check R803 R807 R824 R825 Check R801 R805 R822 R823 R817 Check F801 F802 P801 D801 Check IC802 C805 T801 Check pin2 of IC802 voltage about 2V YES YES YES YES YES YES NO NO NO NO NO 2 2 DC output voltage is unstable ...

Page 32: ...low 0 3V Check Vpin1 2 of IC801 about 1V Check Vpin3 4 of IC801 about 6V Check pinR of IC801 Check circuit if short Check R810 R811 Check R809 R814 Check C815 D806 R812 Check R809 R814 IC801 R818 Check Q801 Q802 Check ZD801 ZD802 ZD803 D803 D805 YES YES NG NG YES NG NG YES NG NG YES YES YES YES YES ...

Page 33: ...R810 R811 R818 Check pin3 of IC802 voltage about 1V Check R810 R811 R818 Check the C pin voltage of IC803 if 3V Check the R pin voltage of IC803 about 2 5V Check D806 C815 if short Check pin1 of IC802 voltage is 5 8V Check sampling Circuit END Unstable power YES YES YES YES YES NO NO NO NO NO NO 2 4 Backlight can t be turned on ...

Page 34: ...e moment of restart Check CN501 CN502 CN503 and CN504 Is there high level voltage on pin8 of IC501 Is there 12Vdc voltage on pin13 of IC501 U501 U502 fail Check I F board Check power supply R526 open Connecting the output connector again T501 T502 fail Check protected circuit Q501 Q502 Q503 Q504 F501 open IC501 fail YES YES YES YES YES YES YES YES NO NO NO NO NO NO NO NO YES YES ...

Page 35: ...CFL Enable pin3 of U105 Check crystal pin20 21 waveform of U105 Check reset pin 10 of U105 Check pin30 31 35 44 of U105 MCU Check power supply pin 1 2 of CN101 Check R105 R106 R157 C114 Q103 Inverter Fail Check X101 C154 C155 Check C150 D102 R137 Check FB108 R131 R132 R133 Power fail NG NG NG NG NG NG YES YES YES YES YES YES ...

Page 36: ...f U104 exists Check LVDS signal Check Q101 Q102 Q107 R103 Check Panel Enable of U105 pin2 is low Check VLCD is 5V Change LVDSCable LVDS Cable Reinsert Workmanship Panel Fail Check RP101 LVDS cable NG Check the pins of U105 OK OK OK OK OK OK NG NG NG NG NG NG ...

Page 37: ...1 of U105 and pin33 34 of U104 Change LVDS Cable LVDS Cable Reinsert Check ALE RDZ WRZ AD0 AD1 AD2 AD3 HWRESET 1 CheckX101 C154 C155 2 CheckX102 C126 C168 LVDS Cable NG Workmanship OK OK OK OK NG NG NG NG 3 4 If brightness uniform change Inverter or Panel 3 5 If you find the vertical line on the screen please change panel ...

Page 38: ...38 Exploded Diagram ...

Page 39: ...39 Process To Access Factory Mode Power Off Press AUTO MENU buttons at the same time Power On Release the AUTO MENU buttons Press MENU Button Press Button Press Menu Button Enter the factory Mode ...

Page 40: ...MATION VGA Connector D Sub 15pin Pin Assignments Pin Symbol Pin Symbol Pin Symbol 1 Red 6 Red_GND 11 N C 2 Green 7 Green_GND 12 DDC_SDA 3 Blue 8 Blue_GND 13 HSYNC 4 N C 9 PC 5V 14 VSYNC 5 GND 10 N C 15 DDC_SCL Chapter 5 ...

Page 41: ... on how best to dispose it or follow the rules set by your regional Acer office on how to return it PART LIST CATEGORY PARTNAME DESCRIPTION CASE COVER BRACKET ASSEMBLY HRN ASS Y 8P 280mm UL2651 28FW08E23 0F D HRN ASS Y 8P 280mm UL2651 28FW08E23 0F D Cable LVDS FFC 30P cable HRN LVDS FFC 30P 240mm Cable VGA cable black CABLE D SUB 15P MALE 6FT BLACKSZ4120955B Cable Euro power cord black PWR CORD 6A...

Page 42: ...W P CROSS W WAS M3 4 Zn SCREW P CROSS W WAS M3 4 Zn screw SCREW P CROSS W WAS M3 6 Zn SCREW P CROSS W WAS M3 6 Zn screw FOIL AL DOUBLE COND 45x35x0 04mm LE17 FOIL AL DOUBLE COND 45x35x0 04mm LE17 Board main board PCBA IF BOARD LE1710 6A0 Board power invertor board PCBA PWR INV B LE1710 6A0 PANEL LCD PANEL 17 MT170EN01 V1 G3AM170000512 LCD PANEL 17 MT170EN01 V1 G3AM170000512 Board Key pad PCBA KEYP...

Page 43: ...43 SHEMATIC DIAGRAM Keypad Diagram Interface Board Schematic Chapter 7 ...

Page 44: ...44 ...

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Page 49: ...49 ...

Page 50: ...50 POW INV Board Schematic ...

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