Acer AL1722 Service Manual
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Acer AL1722 Service Manual

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Acer AL1722
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  • Page 1 Acer AL1722 Service Guide...
  • Page 2 Service Guide Version and Revision Version Release Date Revision Jan.12, 2005 Original release...
  • Page 3 Printed in Taiwan. Disclaimer The information in this guide is subject to change without notice. Acer Incorporated makes no representations or warranties, either expressed or implied, with respect to the contents hereof and specifically disclaims any warranties of merchantability or fitness for any particular purpose.
  • Page 4 ACER-AUTHORIZED SERVICE PROVIDERS, your Acer office may have a DIFFERENT part number code to those given in the FRU list of this printed Service Guide. You MUST use the list provided by your regional Acer office to order FRU parts for repair and service of customer machines.
  • Page 5 Warning: (For FCC Certified Models) Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy, and if not installed and used in accordance with the instructions, may cause harmful interference to radio communications.
  • Page 6 Precautions Do not use the monitor near water, e.g. near a bathtub, washbowl, kitchen sink, laundry tub, swimming pool or in a wet basement. Do not place the monitor on an unstable trolley, stand, or table. If the monitor falls, it can injure a person and cause serious damage to the appliance.
  • Page 7 Special Notes On LCD Monitors The following symptoms are normal with LCD monitor and do not indicate a problem. Notes Due to the nature of the fluorescent light, the screen may flicker during initial use. Turn off the Power Switch and then turn it on again to make sure the flicker disappears. You may find slightly uneven brightness on the screen depending on the desktop pattern you use.

  • Page 8: Table Of Contents

    Chapter 1 Monitor Features Induction Electrical Requirements LCD Monitor General Specification LCD Panel Specification Support Timing Block Diagram Main Board Diagram Software Flow chart Main Board Layout Front Bezel Rear Bezel Chapter 2 Operating Instructions External Controls Front Panel Controls Adjusting the picture Hot-Key Menu OSD Message...

  • Page 9: Induction

    MTBF target is 50k hours or more. Signal Interface Sync Type Color Temp User Adjust Headphone Jack Microphone Jack USB Hub Tilt / Swivel Chart of AL1722 Panel Separate / Compatible 1.5W + 1.5W (Rated power) Speaker Chapter 1 17" Samsung LTM170EU-21 D-SUB...

  • Page 10: Electrical Requirements

    Electrical Requirements Standard Test Conditions All tests shall be performed under the following conditions, unless otherwise specified. Ambient light Viewing distance Warm up time All specifications Fully functional Measuring equipment Control settings User brightness control User contrast control User red/white balance, Green/white balance and Blue/white balance control Power input...

  • Page 11: Lcd Monitor General Specification

    LCD Monitor General Specification Panel type Display size Display mode Pixel pitch Display dot Pixel clock Contrast ratio Brightness Response time (Tr/Tf) Display color Viewing angle Pc interface Signal connector Interface frequency Plug & play Power Input voltage Total output power 17 “...

  • Page 12: Lcd Panel Specification

    LCD Panel Specification LCD Panel Model (SAMSUNG LTM170EU-21) Display Type Resolution Display Dot Display Area Pixel Pitch Display Color Lamp Frequency Lamp Current Weight Optical Specifications = 25 ± 2°C = 6.5mArms ITEM Contrast Ratio (Center of screen) Response Rising Time Falling Luminance of white...

  • Page 13: Support Timing

    Supported Timing Modes SVGA VESA SXGA Support Modes There will be 12 total support modes to accommodate the above mode and other video modes within the frequency range of the monitor. 80Hz refresh rate Support Monitor should display 80Hz refresh rate mode as emergency mode. Monitor should display “...
  • Page 14 PIN NO. DESCRIPTION TMDS Data 2- TMDS Data 2+ TMDS Data 2/4 Shied TMDS Data 4- TMDS Data 4+ DDC Clock DDC Data Analog Vertical Sync TMDS Data 1- TMDS Data 1+ TMDS Data 1/3 Shield TMDS Data 3- PIN NO. DVI Connector layout DESCRIPTION TMDS Data 3-...

  • Page 15: Block Diagram

    Monitor Block Diagram The LCD MONITOR will contain a main board, an inverter board, adapter, keypad board and audio board which house the flat panel control logic, brightness control logic and DDC. The Inverter board will drive the backlight of panel. The adapter will provide the 12V DC-power to inverter/power board and main board.

  • Page 16: Main Board Diagram

    Main Board Diagram EEPROM 24C16 OSD Control Interface (Keypad) LCD Interface Scaler TSU56AK (Include: ADC, OSD etc) D-SUB Connector Connector EEPROM EEPROM 24C02 24C02 Crystal 14.318MHZ...

  • Page 17: Software Flow Chart

    Software Flow Chart 1) MCU initialize. 2) Is the eeprom blank? 3) Program the eeprom by default values. 4) Get the PWM value of brightness from eeprom. Check the pin PANEL1 and PANEL2 to tell which panel to get with it. 5) Is the power key pressed? 6) Clear all global flags.

  • Page 18: Main Board Layout

    Main Board Layout Label U301 U302 U601 X401 U401 Y601 U201 U202 U603 U602 CN301 CN302 CN503 CN201 CN602 U701 CN701 Part Number 56L1133 34 56L1133 34 56L1125137SZ6 93L 22 53 56L 562 82 93L 22 55 J 56G 563 38 56L 563 7 56L 643 5A 56L1133 56...
  • Page 19 The step between front bezel and back cover shall be within specification. Top and Bottom Back cover & Bezel concavity 0.8mm ≤ A ≤ 1.3 mm Back Cover & Hinge Cover concavity 0mm ≤ B ≤ 0.5mm Left and Right Back cover &...
  • Page 20 Top and Bottom Back cover & Bezel step 0mm ≤ D ≤ 0.8 mm LCD Horizontally The angle between front bezel and LCD unit in bottom side should not large than 1.0mm. Left and Right Back cover & Bezel step 0mm≤...
  • Page 21 The distance of the LCD display unit from left side to right should not large than 4.0mm. Tilt Base Rotation Tilt up 15 ± 2°/ down 5 ±2° Plastic Material For TCO99 Front Bezel ABS 94HB Back Cover ABS 94HB The Others ABS 94HB For MPRII Front Bezel ABS 94HB...

  • Page 22: Front Bezel

    Front Bezel Item Description >/Volume </Volume...

  • Page 23: Rear Bezel

    Rear Bezel Item Description D-SUB CABLE DC-Jack Power Cable AC POWER CORD External Adapter DVI CABLE AUDIO CABLE...

  • Page 24: Chapter 2 Operating Instructions

    Operating Instructions Press the power button to turn the monitor on or off. The other control buttons are located at front panel of the monitor. By changing these settings, the picture can be adjusted to your personal preferences. The power cord should be connected. •...

  • Page 25: Front Panel Controls

    Front Panel Control • Power Button: Press this button to turn the monitor ON or OFF, And display the monitor’s state. • Menu / Enter : Activate OSD menu when OSD is OFF or activate/de-activate adjustment function when OSD is ON or Exit OSD menu when in Volume Adjust OSD status. </Volume: •...

  • Page 26: Adjusting The Picture

    Adjusting the Picture a. How to Adjust a Setting 1. Press the MENU-button to activate the OSD window. 2. Press <or >to select the desired function. 3. Press the MENU-button to select the function that you want to adjust. 4. Press < or >to change the settings of the current function. 5.
  • Page 27 II. Dual-Input Model, Analog Signal Input III. Dual-Input Model, Digital Signal Input...
  • Page 28 b. The Description For Control Function Main Sub Menu Menu Item Icon Contrast Brightness Focus Clock H. Position V. Position Warm Cool User / Red User/ Green User / Blue English 繁體中文 Deutsch Français Español Italiano 简体中文 日本語 H. Position V.
  • Page 29 Main Menu Sub Menu Icon Item Auto Config (Analog-Only Model) Analog (Dual-Input Digital Model) Information Reset Exit Menu Icon Auto Adjust the H/V Position, Focus and Clock of Select input signal from analog (D-Sub) Select input signal from digital (DVI) Show the resolution, H/V frequency and input port of current iput timing.

  • Page 30: Hot-Key Menu

    Hot-Key Menu a. Outline b. The Description For Hot-Key Function Item Operation When the OSD is closed, press Volume Left or Right button will be Volume Hot-Key Function OSD Message a. Outline b. The Description For OSD Message Item 1.) When Analog signal input, if User Press Hot-Key “Auto”, will show this Auto Config message, and the monitor do the auto config function.

  • Page 31: Logo

    Logo When the monitor is power on, the LOGO will be showed in the center, and disappear slowly. How To Optimize The DOS-Mode Plug And Play Plug & Play DDC1/2B Feature This monitor is equipped with VESA DDC1/2B capabilities according to the VESA DDC STANDARD.

  • Page 32: Chapter 3 Machine Disassembly

    Chapter 3 Machine Disassembly This chapter contains step-by-step procedures on how to assemble the monitor for maintenance. Disassembly Procedure Disassemble the base 1. Remove hinge cover. (Fig 1) 2. Remove four screws to release stand base. (Fig 2) Fig 1 Fig2...
  • Page 33 Disassemble the front cover 1. Remove seven screws to release front bezel. (Fig 3) 2. Remove connector wire with keyboard and main board. (Fig 4) 3. Remove two screws to release keyboard. (Fig 5) 4. Remove connector wire with keyboard and speakers. (Fig 6) Remove two screws to release speakers (right and left).
  • Page 34 Fig 5 Fig 6 Fig 7...
  • Page 35 Disassemble the rear bezel Disassemble the shield 1. Remove two screws to release the shield. (Fig 8) 2. Remove the shield as arrow direction. Fig8...
  • Page 36 Disassemble the main board 1. Remove four screws to release main board. (Fig 9) 2. Remove connector wires with main board and Inverter board, main board and keyboard, main board and panel. (Fig 10) Fig 9 Fig10...
  • Page 37 Disassemble the Inverter board 1.Remove four screws to release Inverter board. (Fig 11) 2. Remove connector wires with Inverter board and panel. (Fig 12) Fig11 Fig12...
  • Page 38 Disassemble the panel 1. Remove four screws (right and left) to release metal frame. (Fig 13) Fig13...

  • Page 39: Chapter 4 Troubleshooting

    Troubleshooting This chapter provides troubleshooting information for the AL1722: 1. No power Press power key and look if the picture is normal Measure 12V input voltage Measure U101 PIN2=5V? Y601 oscillate waveform is normal No power Replace Y601 Replace U601...
  • Page 40 2. No picture (LED is orange) No picture Key is under control? X401 oscillate waveform is normal Check if the sync signal from computer is output and video cable is connected normally Replace U401 Replace X401 Input the sync signal of computer, or change the cable Y601 oscillate waveform is normal...
  • Page 41 3. Panel Power Circuit Measure Q204 base is high level? Check Q204 and Q203 are broken or CN503 solder? Check Correspondent component. Replace PANEL Y601 oscillate waveform is normal Replace Y601 Replace U601 Replace U401...
  • Page 42 4. Keypad Board OSD is unstable or not working Is Keypad board connecting normally Is Button Switch normally Is Keypad board normally Check main board Connect Keypad Board Replace Button Switch Replace Keypad Board...
  • Page 43 5. Inverter Board No Backlight Check CON102 Pin5/6 =12V? Check ON/OFF signal Check U201 pin9=12V ? Check the pin1 of U201 have saw tooth wave Check D201(-), D202(-) have the output of square wave at short time. Check the resonant wave of pin2 & pin5 for PT201/ PT202 Check the output of PT201/PT202 Check connecter &...
  • Page 44 6.No Audio Mute and volume setting is ok? Check power supply of U701 is 12V? Check input signal of U701is ok? Replace U701 Replace speaker Reset mute and volume Check connecting is ok? Reconnect Check correspondent component...

  • Page 45: Chapter 5 Connector Information

    Connector Information The following figure shows the connector locations on the monitor board: PIN NO. PIN NO. DESCRIPTION TMDS Data2- TMDS Data2+ TMDS Data 2/4 Shield TMDS Data4- TMDS Data4+ Analogue Vertical Sync TMDS Data1- TMDS Data1+ TMDS Data 1/3 Shield TMDS Data3- 15 –...

  • Page 46: Chapter 6 Fru (Field Replacement Unit) List

    FRU (Field Replaceable Unit) List This chapter gives you the FRU (Field Replaceable Unit) listing in global configurations of AL1722.Refer to this chapter whenever ordering for parts to repair or for RMA (Return Merchandise Authorization). NOTE: Please note WHEN ORDERING FRU PARTS, that you should check the most up-to-date information available on your regional web or channel (http://aicsl.acer.com.tw/spl/).

  • Page 47: Exploded Diagram

    Exploded Diagram (Model: AL1722)
  • Page 48 Part List Item Picture Description Part No. 33L4636 FV L/33L4637 Hinge cover FV L Stand base 34L1189 FV B Front cover 34L1187CGE B Rear cover 34L1188AFV 2B...
  • Page 49 Shield 85L 641 1 Metal frame 15L5921 5 Panel 750LLS70U21 Power board IDPC 7425C3...
  • Page 50 Main board AIC780KS2AE Key board AIK780KB4 78L 332 1 L/78L 332 Speakers...

  • Page 52: Chapter 7 Schematic Diagram

    Schematic Diagram Analog and Digital Input CN301 DB15 PC5V VGA_CON D301 D302 BAV99 BAV99 FB304 150 OHM R312 1/16W 　 D319 D320 MLL5232B 5.6V MLL5232B 5.6V CN302 D321 D318 MLL5232B 5.6V MLL5232B 5.6V RGB GND HSYNC VSYNC SYNC GND CLK_DDC2 DDC SCL DAT_DDC2 DDC SDA...

  • Page 53: Tsu56Ak

    TSU56AK TSU56AK GNDR GNDG GNDB HSYNC VSYNC CLK+ CLK- VDVI R403 390 　 1/16W VCC3.3 R402 R401 Direct Bus 4.7K C401 R402 4.7K 3-WIRE 0.1uF 4.7K 　 1/16W VCC5V R407 R405 R404 R406 R401 1/16W 1/16W 1/16W 1/16W 　 　 　...

  • Page 54: Lvds

    LVDS PA[0..9] PA[0..9] PA[0..9] LVA3P LVA3M LVACKP LVACKM LVA2P LVA2M LVA1P GA[0..3] LVA1M LVA0P LVA0M PB[0..9] PB[0..9] LVB3P PA[0..9] LVB3M LVBCKP LVBCKM LVB2P LVB2M LVB1P BA[0..5] LVB1M LVB0P LVB0M PB[0..9] GPO[0..4] GPO[0..4] GPO0 R501 　 1/16W GPO1 R502 　 1/16W GPO2 R503 1/16W...

  • Page 55: Dc Power

    DC Power VCC12V CN201 ON_OFF VCC12V VCC12V VCC5V VCC5V CONN VCC5V C202 220uF/25V R203 　 1/16W Brightness R204 1/16W 　 R205 4.7K 　 1/16W Q202 C206 AdjBACKLITE PMBS3904 VCC5V VLCD R206 R208 　 1/16W 　 1/16W Q203 AO3401 R207 4.7K 　...

  • Page 56: Mcu/Key Board Connector

    MCU/ Key Board Connector VCPU VCPU U603 MAX810STR (NC) R643 D601 LL4148 Reset VCPU Circuit R604 C605 R605 U602 R615 0.1uF R641 24C16 R642 R626 　 AUDIO_SD C612 0.1uF VCPU R618 　 1/16W 4.7K 1/16W 　 R619 LED_O Q602 LED_G PMBS3906 VCPU R602...

  • Page 57: Audio

    Audio MUTE AUDIO_SD CN701 R701 10K 1/16W 　 R703 10K 1/16W 　 PHONEJACK D702 LL4148 C711 100pF VCC12V_AUDIO VCC12V_AUDIO C704 0.47uF/16V OUTL C706 0.47uF/16V OUTR D701 R704 100 1/16W 　 VOLUME R705 LL4148 STBY VAROUT_R 10K 1/16W 　 MUTE VAROUT_L R706 100 1/16W 　...

  • Page 58: Inverter Board

    Inverter Board F201 L205 4A/63V +12V 71A55-19 Q202 C202 Q201 DTA144WKA 0.1U/25V DTC144WKA C204 0.1U/25V NO/OFF R202 R210 5.1K R207 OPEN R208 4.7K C207 4.7U/16V C209 R205 1U/25V C205 0.1U/25V R201 C208 330P/50V C210 R204 1U/25V R206 R209 4.7K R203 5.1K C203 R211...
  • Page 59 CON101 +12V_POWER( 88A304-1S) F101 L101 5A/63V(88A304-1S) INDUCTOR(71L55-28) GND_F C0N102 ON/OFF 33A8009-12L-H +12V U101 SI-8050SD TO263 Vout C101 C102 220 uF/25V 220 uF/25V C108 0.1 uF/25V R101 C109 OPEN 0.1 uF/25V ON/OFF is power GND is signal GND R102 R103 0(OP) L102 R104 150UH...

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