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Acer

Service Manual

Chapter 6- TROUBLE SHOOTING

1. No Power & LED Off

No power

Check primary
rectifier voltage

Check IC802,
C804, T801,

Check
circuit if
short

Check F801, P801,
RT,801,D801

Check pin6 of
IC802 voltage
about 12V

CheckC810,D803,C80
7,

Check pin2 of IC802
voltage about 3V

Check primary OVP,
OLP and secondary
feedback, OVP circuit

Check pin1 of IC802
voltage is below 1V

Check R811, R810,
R809, R808,R814

END

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Summary of Contents for AL2017

Page 1: ...Acer Service Manual Service Manual LCD Monitor Acer AL2017 0 ...

Page 2: ... Release Copyright Copyright 2007 InnoLux Tech Corp Ltd All Rights Reserved This manual may not in whole or in part be copied Photocopied reproduced translated or converted to any electronic or machine readable form without prior written permission of InnoLux Tech Corp Ltd Acer AL2017 Service Manual ...

Page 3: ...EORY 6 4 INVERTER CIRCUIT 錯誤尚未定義書籤 CHAPTER 4 DISASSEMBLY ASSEMBLY 9 1 EXPLODED DIAGRAM 9 2 DISASSEMBLY BLOCK 10 3 ASSEMBLY BLOCK 11 CHAPTER 5 TEST AND ADJUSTMENT 12 1 GENERAL POINTS 12 2 INPUT SIGNAL 13 3 FUNCTION CHECK 14 4 DISPLAY CHECK 15 5 PICTURE CHECK 16 CHAPTER 6 TROUBLE SHOOTING 19 1 NO POWER LED OFF 19 錯誤尚未定義書籤 2 UNSTABLE POWER 20 3 NO RASTER 21 4 BLACK SCREEN 22 5 BAD SCREEN 23 6 WHITE...

Page 4: ...s wet unplug the power cable immediately and consult your closed dealer Always unplug the monitor before cleaning it Clean the cabinet with a clean dry cloth Apply non ammonia based cleaner onto the cloth not directly onto the class screen Do not place heavy objects on the monitor or power cord 2 PRODUCT SAFETY NOTICE Many electrical and mechanical parts in this chassis have special safety visual ...

Page 5: ... 2 SERVICE TOOLS EQUIPMENT REQUIRED 1 SIGNAL GENERATOR 2 MULTIMETER 3 SCREW DRIVER 4 OSCILLOSCOPE 5 Soldering IRON 6 SOLDER 7 VGA Cable 15pins point to point 8 Color Analyzer 9 Myson412 ISP Board 10 EDID Board 11 EDID program file ...

Page 6: ...Switching Mode Power Supply 1 1 1 AC Current Input Circuit P801 is a connector for connecting AC Power F801 is a fuse to protect all the circuit AC input voltage is from 90v to 264V R801 and R802 joined between two inputting main circuit to prevent man from shock L801 is used to clear up low frequency wave C801 and C802 are used to discharge the waves that L801 produced High frequency waves are da...

Page 7: ...output sampling resistor When the sampling voltage more than 2 5V or less than 2 5V current of FB IC802 will change this can change the voltage from T801 OVP Protect Circuit When output is overvoltage the auxiliary winding voltage will be increased when it reaches about 14V Q803 is triggered It makes the IC802 Pin 1 exceed 5V then the IC802 output will be disabled Q801 R816 R817 and ZD803 make up ...

Page 8: ... via CN102 4 U107 is an EEPROM IC which memory OSD setting and save the value adjusted by user LED Indicator When monitor normally working scaler TSUMU58WHJ pin 124 sends out a low potential via R107 switch on Q105 then flows to CN102 7 LED Green ON When in Suspend mode scaler TSUMU58WHJ pin 123 sends out a low potential via R102 switch on Q102 then flows to CN102 5 LED Amber ON 1 2 4 Scaling IC U...

Page 9: ...ng two lamps in series Turning each N Channel MOSFET on off complementarily produces an alternating current through the transformer primary and secondary The on duration of the switches determines the amount of energy delivered to the CCFLs R504 C504 R505 C505 R532 C529 R530 C522 are snubber networks they suppress Voltage transient spike in drain of power MOSFET R506 R510 C509 C513 C514 R525 R531 ...

Page 10: ...Acer Service Manual Chapter 4 Disassembly Assembly 1 Exploded Diagram Exploded drawing With DVI 9 ...

Page 11: ...Acer Service Manual 10 Exploded drawing W O DVI We will update later ...

Page 12: ...SY PANEL 1 CHASSIS 1 Gasket W8 H3 L50 1 Foil AL L60 W35 1 KEY PAD 1 CABLE 1 T3 6 Zn ROHS 1 BACK COVER 1 ASSY BEZEL 1 BEZEL 1 BUTTON POWER KEY 1 BUTTON FUNCTION 1 LENS 1 ASSY STAND 1 SCREW P CROSS M4 8 BLA CK NL NYLOK SCREW B CROSS T T 4 8 BL K ROHS 2 LE 2018 LCD Monitor STAND 1 HINGE 1 BRACKET FINGER 1 SCREW B CROSS W W SPR M4 20 Zn ROHS 3 ASSY BASE 1 BASE 1 RUBBER 4 GASKET 1 PLATE BASE 1 T4 6 Zn ...

Page 13: ... M3 5 Ni ROHS 5 TAPE ACE 3 M3 6 W W SPR Zn ROHS 1 Gasket W8 H3 L50 1 Foil AL L60 W35 1 ASSY BASE BASE 1 RUBBER FOOT 4 GASKET 1 PLATE BASE 1 T4 6 Zn ROHS 2 BACK COVER ASSY STAND M4 8 Black Zn NL ROHS 4 SCREW B CROSS T T 4 8 BLK ROHS 2 BRACKET FINGER 1 HINGE 1 STAND SCREW B CROSS W W SPR M4 20 Zn ROHS 3 ASSY FRONT BEZEL LE 2018 LCD Monitor FRONT BEZEL 1 FUNCTION KEY 1 POWER BUTTON 1 LED LENS HINGE C...

Page 14: ...ervice Manual Process To Access Factory Mode Power Off Press AUTO MENU button at the same time Power On Release the AUTO MENU button Press MENU Button Press Button Press Menu Button Enter the factory Mode 13 ...

Page 15: ... 4 1 Observation distance from eyes to panel is defined as 50cm 1 4 2 Visual distance from instrument to panel is defined as 20cm 1 5 Key Function Description 1 5 1 Control buttons on the front bezel CONTROL KEY KEYS FUNCTION AUTO A When OSD un displays press AUTO to perform auto adjustment B When OSD displays press AUTO to return to previous level menu MENU A When OSD isn t shown on screen press ...

Page 16: ...The capability of sync signal inputs shall include separate sync Input impedance 2k2 ohms the signals are defined as follow Separate sync TTL level Positive Negative 2 1 2 Input signal mode PRESET TEST MODE TIMING Resolution H Freq kHz V Freq Hz Dot Clock MHz Mode 31 5 60 0 25 175 37 9 72 0 31 500 640 x 480 37 5 75 0 31 500 35 1 56 0 36 000 37 9 60 0 40 000 48 1 72 0 50 000 800 x 600 46 9 75 0 49 ...

Page 17: ... Test pattern pattern 1 of crosshatch GENERAL 1 3 2 3 Select OSD menu to execute Auto function screen picture shouldn t appear abnormal phenomenon and picture on screen should fit in with active display screen 3 3 Auto Color Balance 3 3 1 Test mode 1400x1050 60 Hz 3 3 2 Test pattern pattern 42 of 5 MOSAIC 3 3 3 Enter Factory Mode pressing Auto color key and execute AUTO 3 4 Timing Check 3 4 1 Test...

Page 18: ... Flicker Check Connect LCD monitor to PC set LCD monitor to be timing of 14400x1050 60 Hz adjust brightness to be default value brightness at maximum execute Auto function and then check picture of shut down under windows 98 operating system or flicker pattern of pixel on off It should be that no flicker be found on panel screen 4 2 Panel Defect Inspection 4 2 1 Test mode 1400 x 1050 60Hz 4 2 2 Te...

Page 19: ...ratch and Bubbles in Display area or on The Polarizer 0 15mm D 0 5 mm N 3 L 0 5mm and W 0 05 mm Ignored 0 5mm L 5mm and 0 05mm W 0 1mm N 4 Line Shape Particles Scratch Fiber and Bubbles in display area or on The Polarizer L 5mm or W 0 1mm N 0 There should be non uniformity through 5 transparency of filter or judge by limit sample if necessary Display non uniformity Scratch No harm Dirt Wrap No har...

Page 20: ...inate and luminance by color analyzer as the following Chromaticity Coordinate Mode x y 9300K 0 283 0 030 0 298 0 030 USER 6500K 0 313 0 030 0 329 0 030 5 3 Brightness Out Video signal input 700mV 2 5 3 1 Test mode 1400x1050 60 Hz 5 3 2 Test pattern pattern 41 of WHITE 5 3 3 Test tool Color Analyzer Chroma7120 Set brightness and contrast to be maximum with white pattern to measure the screen cente...

Page 21: ...Acer Service Manual 20 download 5 4 3 If writing EEPROM is successful and then shows text PASS on screen if writing EEPROM is failure then shows text FAIL ...

Page 22: ...ge Check IC802 C804 T801 Check circuit if short Check F801 P801 RT 801 D801 Check pin6 of IC802 voltage about 12V CheckC810 D803 C80 7 Check pin2 of IC802 voltage about 3V Check primary OVP OLP and secondary feedback OVP circuit Check pin1 of IC802 voltage is below 1V Check R811 R810 R809 R808 R814 END 21 ...

Page 23: ...F BD Yes Is there High level voltage on pin10 of IC501 No Check I F BD Vsense voltage is 2 9V Yes Yes Lamp connector opened Are there PWM signal on pin1 pin15 of IC501 No No IC501 failure Pin 5 of IC501 voltage is Low level Yes Feedback circuit failure Yes Yes Check C524 R528 R533 D507 NO Pin 3 of IC501 voltage is high level voltage Yes IC501 protected Yes Check D505 D511 D512 D513 R520 C520 END Y...

Page 24: ...5 of U105 Check crystal pin 96 97 waveform of U105 Check reset pin84 of U105 Check power supply for U105 Check power supply pin 1 2 of CN101 Check R167 Q106 R108 R110 Inverter Fail Check X101 C153 C154 Check C144 R172 Check FB102 FB103 FB105 FB106 Power fail NG NG NG NG NG NG YES YES YES YES YES YES 23 ...

Page 25: ...Acer Service Manual 4 Bad Screen 24 ...

Page 26: ...n END White screen Check LVDS signal Check Q101 Q103 Q110 C108 C109 Check Panel Enable of U105 pin48 Check VLCD is 5V Change LVDSCable LVDS Cable Reinsert Workmanship Panel Fail LVDS cable NG U105 Fail OK OK OK OK OK NG NG NG NG NG 25 ...

Page 27: ...No Sound Re insert or Change the Line in Cable Check Vs of IC 701 Check the Input of IC 701 Check the output of IC 701 Check the Mute and Volume pins of IC 701 shorted or not End Power Fail Change IC 701 OK NG NG NG NG OK OK OK OK 26 ...

Page 28: ...24 Change R822 R823 R824 Check the R pin voltage of IC803 about 2 5V Check R819 R820 Check R818 D804 C807 if short Change R818 D804 Check pin2 of IC802 voltage is 3V Check pin1 of IC802 voltage below 1V Change R808 R 809 R810 R 811 R815 END Check the C pin voltage of IC803 if 3V Change IC803 27 ...

Page 29: ...153 C154 C155 C156 C157 40 419311040060R C SMD 0603 X7R 0 1uF 50V K RoHS C117 C120 C121 C131 C133 C1 34 C136 C143 C151 C161 C162 C168 50 419341054670R C SMD 0805 Y5V 1uF 16V Z RoHS REV A C160 C137 60 419301000560R C SMD 0603 NPO 10PF 50V J RoHS C158 C159 70 419302210560R C SMD 0603 NPO 220PF 50V J RoHS C116 80 419303300560R C SMD 0603 NPO 33PF 50V J RoHS C115 90 419314734010R C SMD 0402 X7R 0 047u...

Page 30: ... 410500046090R XSTR MMBT3906 PNP SOT 23 PANJIT RoHS 380 412000435480R IC AT24C02BN 10SU 1 8 SOIC8 2K ATMEL Ro U101 U102 380 412000480280R IC M24C02 RMN6TP SO8 ST RoHS 380 412000480990R IC CAT24C02WI TE13 SOIC 8 CATALYST RoHS 390 412000372020R IC LD1117AL 3 3V A SOT 223 UTC RoHS U103 390 412000372830R IC AS1117L 3 3TR LF SOT223 A1S EMI RoHS 390 412000372070R IC AZ1117H 3 3 SOT 223 AAC RoHS 400 4120...

Page 31: ... L802 L803 200 440149000220R SKT AC 10A 250V U C V G Y 45mm TU 301 SP P801 210 442299001130R CON PHONE JACK GREEN R A 1P PB J303 2 A P701 220 432009400701R NTC 5Ω 4A 10ψ P 5mm F RoHS RT801 230 415350208550R RES MOF 2W 0 2Ω J MINI HK15 RoHS R805 240 426000090790R XFMR SW DIP 550uH SPW 079 ROHS T801 250 411050005020R DIO BRDG BL4 06 BF52 LF 600V 4A FRONTIER D801 250 411050005090R DIO BRDG FL406 600V...

Page 32: ...514 R704 260 414908470210R RES SMD 0805 47KΩ F RT RoHS R823 270 414916470310R RES SMD 0603 470KΩ F RT ROHS R518 280 414916510110R RES SMD 0603 5 1KΩ F RT RoHS R539 290 414916430210R RES SMD 0603 43KΩ F RT RoHS R508 300 414908047450R RES SMD 0805 470KΩ J RT RoHS R808 R809 R810 R811 310 414916056250R RES SMD 0603 5 6KΩ J RT ROHS REV A R712 R711 320 414916604310R RES SMD 0603 604KΩ F RT RoHS R516 340...

Page 33: ...OLL KG D 0 6mm AT RoHS 10MM J503 J509 J809 J804 J805 J806 110 430405000000R JMPR ROLL KG D 0 6mm AT RoHS 10MM 120 430405000000R JMPR ROLL KG D 0 6mm AT RoHS 12 5MM J505 J516 J801 J802 R804 120 430405000000R JMPR ROLL KG D 0 6mm AT RoHS 12 5MM 130 430405000000R JMPR ROLL KG D 0 6mm AT RoHS 15MM J504 J502 J513 130 430405000000R JMPR ROLL KG D 0 6mm AT RoHS 15MM 140 430405000000R JMPR ROLL KG D 0 6mm...

Page 34: ...0638080020R WFR 8P 1 5mm R A S8B ZR RoHS JST CN107 20 411070054990R LED G Y 3x5mm L 115VCGKSYKW L 5 33 SZ K LED101 20 411070053990R LED G Y 3x5mm 1259 7SYGUYW S5 30 A3 F14 30 430602980120R SW TACT 160gf 1P H 4 3mm DIP SFKHHAL2420 SW101 SW102 SW103 SW104 SW105 40 415020222540R RES CF 1 4W 2 2KΩ J AT MINI REV A RoHS R901 R902 50 490931500000R PCB KEYPAD BOARD LE2018 ROHS 60 511130001200R SOLDER BAR ...

Page 35: ...Acer Service Manual Attachment 2 Schematic 34 ...

Page 36: ...Acer Service Manual 35 ...

Page 37: ...Acer Service Manual 36 ...

Page 38: ...Acer Service Manual 37 ...

Page 39: ...Acer Service Manual 38 ...

Page 40: ...Acer Service Manual 39 ...

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