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Acer AL1922R Service Manual

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Acer AL1922r
Service Guide
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  Summary of Contents for Acer AL1922R

  • Page 1 Acer AL1922r Service Guide...
  • Page 2 Service Guide Version and Revision Version Release Date Revision Jun.- 15- 2005 Initial release...
  • Page 3 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 incidental or consequential damages resulting from any defect in the software.
  • Page 4 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. 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.
  • Page 5 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 6: Table Of Contents

    Chapter 1 Monitor Features Introduction Electrical Requirements LCD Monitor General Specification LCD Panel Specification Support Timing Monitor Block Diagram Main Board Diagram Software Flow chart Main Board Layout Front Bezel Rear Bezel Operating Instructions Chapter 2 External Controls Front Panel Controls Adjusting the picture Hot-Key Menu OSD Message...
  • Page 7: Chapter 1 Monitor Features

    Color Temp User Adjust Speaker Headphone Jack Microphone Jack USB Hub Tilt / Swivel Height Adjust Chart of AL1922r AU 19" V5 PANEL (For AU panel) LTM190EX-L01 (For SEC panel) D-SUB Separate / Compatible Support DDC2B 1W + 1W (Rated power)
  • Page 8: 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 Blue/white balance control Power input Ambient temperature Analog input mode...
  • Page 9: 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 19 “...
  • Page 10: Lcd Panel Specification

    LCD Panel Specification LCD Panel Model (AU M190EN04 V5) Display Type Resolution Display Dot Display Area Pixel Pitch Display Color 16.2M (true) Lamp Frequency Lamp Current Weight Optical Specifications Ta = 25 ± 2°C active matrix color TFT LCD 1280x1024 pixels 1280x (RGB) x 1024 376.32mm(H) x 301.06mm(V) 0.294mm(H) x 0.294mm(V)
  • Page 11 LCD Panel Model (SEC LTM190EX-L01) Display Type Resolution Display Dot Display Area Pixel Pitch Display Color Lamp Frequency Lamp Current Weight Optical Specifications Ta = 25 ± 2°C active matrix color TFT LCD 1280x1024 pixels 1280x (RGB) x 1024 376.32mm(H) x 301.06mm(V) 0.294mm(H) x 0.294mm(V) 16.2M (true) 60kHz(max)
  • Page 12: Supported Timing

    Supported Timing Mode Resolution 640x480@60Hz 640x480@72Hz 640x480@75Hz 800x600@56Hz 800x600@60Hz SVGA 800x600@72Hz 800x600@75Hz 1024x768@60Hz 1024x768@70Hz 1024x768@75Hz 1152x864@75Hz 1280x1024@60Hz SXGA 1280x1024@75Hz 720x400@70Hz 640x350@70Hz 1024x768@72Hz 640x480@67Hz SVGA 832x624@75Hz 1024x768@60Hz 1024x768@75Hz Support Modes There will be 20 total support modes to accommodate the above mode and other video modes within the frequency range of the monitor.
  • Page 13: Monitor Block Diagram

    Monitor Block Diagram The LCD MONITOR will contain a main board, a power board (include adapter and inverter), 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 14: Main Board Diagram

    Main Board Diagram EEPROM 24C16 OSD Control Interface (Keypad) LCD Interface Scaler TSU56AK LF (Include: ADC, OSD etc) D-SUB Connector Connector EEPROM EEPROM 24C02 24C02 Crystal 14.318MHZ...
  • Page 15: Software Flow Chart

    Software Flow Chart...
  • Page 16 Remark: 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. 7) Are the AUTO and SELECT keys pressed? 8) Enter factory mode.
  • Page 17: Main Board Layout

    Main Board Layout LABEL U201 56G 563 31 U202 56G 563 7 U401 56G 562 82 U601 56L1125137SZ7 CN201 33G8027 12 CN301 88G 35315F HS CN302 88G 35424F HS CN503 33G802724B H X401 93G 22 53 X601 93G 22 55 H PART NO.
  • Page 18: Front Bezel

    Front Bezel Item >/Volume </Volume /POWER KEY /MENU/ENTER /Auto Adjust Key/Exit Description...
  • Page 19: Rear Bezel

    Rear Bezel Item Description D-SUB CABLE DVI CABLE AUDIO CABLE AC POWER CORD...
  • Page 20: 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 21: 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.
  • Page 22: 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 23 b. The Description For Control Function Main Menu Sub 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 24 Main Menu Sub Menu Sub Menu Item Icon Analog (Dual-Input Digital Model) Information Reset Exit Icon Select input signal from analog (D-Sub) Select input signal from digital (DVI) Show the resolution, H/V frequency and input port of current input timing. Clear each old status of Auto-configuration and set the color temperature to Cool.
  • Page 25: Hot-Key Menu

    Hot-Key Menu a. Outline b. The Description For Hot-Key Function Item Operation When the OSD is closed, press Left or Right Volume 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 message, and the Auto Config monitor do the auto config function.
  • Page 26: 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. It allows the monitor to inform the host system of its identity and, depending on the level of DDC used, communicate additional information about its display capabilities.
  • Page 27: Machine Disassembly

    Machine Disassembly This chapter contains step-by-step procedures on how to assemble the monitor for maintenance. Disassembly Procedure Disassemble the base 1. Remove four screws to release stand base. (Fig 1) 2. Remove the hinge. (Fig 2) Fig 1 Fig 2 Chapter 3...
  • Page 28 Disassemble the front cover 1. Remove four screws to release front bezel and rear 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) 5.
  • Page 29 Fig 5 Fig 6 Fig 7...
  • Page 30 Disassemble the rear bezel Disassemble the shield 1. Remove two screws to release the shield. (Fig 8) 2. Remove the shield as arrow direction. Fig 8...
  • Page 31 Disassemble the audio board 1. Remove two screws to release audio board. (Fig 9) 2. Remove connector wire with audio board and power board. (Fig 10) Fig 9 Fig10...
  • Page 32 Disassemble the main board 1. Remove three screws to release main board. (Fig 11) 2. Remove connector wire with main board and panel. (Fig 12) 3. Remove connector wire with main board and power board. (Fig 13) Fig 11 Fig 12 Fig13...
  • Page 33 Disassemble the power board 1. Remove five screws to release power board. (Fig 14) 2. Remove connector wire with power board and panel. (Fig 15) Fig 14 Fig 15...
  • Page 34 Disassemble the panel 1. Remove four screws (right and left) to release metal frame. (Fig 16) Fig16...
  • Page 35: Troubleshooting

    Troubleshooting This chapter provides troubleshooting information for the AL1922r: 1. No power Press power key and look if the picture is normal Please reinsert and make sure the AC of 100-240 is normal Measure U201 PIN2=2.5V X401 oscillate waveforms are...
  • Page 36 2. No picture (LED is orange) Measure U201 PIN2=2.5V X401 oscillate waveforms are normal Check if the sync signal from computer is output and video cable is connected normally Replace U401 No picture U202 PIN2=3.3V Input the sync signal of computer, or change the cable Replace U201, U202...
  • Page 37 3. Panel Power Circuit Measure Q402 base is high level? Check Q203 and Q204 are broken or CN503 solder? Check Correspondent component. X401 oscillate waveforms are normal Replace PANEL Measure U201 PIN2=2.5V U202 PIN2=3.3V Replace U201, U202 Replace X401 Replace U401...
  • Page 38 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 39 5. PWPC No Power No power Check AC line volt 110V or 220V Check the voltage of C905(+) Check start voltage for the pin3 of IC901 Check the auxiliary voltage is between 10V-16V Check D910, D911, IC902 Check AC line Check F901, bridge rectified circuit Check R906, R907,IC901 Check IC901,T901...
  • Page 40 No Backlight Check C201 (+) =12V Check ON/OFF signal Check U201 pin9=12V ? Check the pin1 of U201 have saw tooth wave Check D201 (-), D202 (-) has 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 41 6.No Audio Mute and volume setting is ok? Check power supply of U201 is 12 V? Check input signal of U201is ok? Replace U201 Replace speaker Reset mute and volume Check connecting is ok? Reconnect Check correspondent component...
  • Page 42: Connector Information

    Connector Information The following figure shows the connector locations on the monitor board: PIN NO. Green Blue Monitor Ground DDC-Return R-Ground G-Ground B-Ground PIN NO. DESCRIPTION TMDS Data2- TMDS Data2+ TMDS Data 2/4 Shield TMDS Data4- TMDS Data4+ DDC Clock DDC Data Analogue Vertical Sync TMDS Data1-...
  • Page 43: Fru (Field Replacement Unit) List

    NOTE: To scrap or to return the defective parts, you should follow the local government ordinance or regulations on how to dispose it properly, or follow the rules set by your regional Acer office on how to return it. Chapter 6...
  • Page 44: Exploded Diagram

    Exploded Diagram (Model: AL1922r)
  • Page 45 Part List Item Picture Description Hinge cover Stand base Front cover Rear cover 34G1336AFV 2B Shield Metal frame Panel 750LLU90N45/750LLS90EX1 Audio board Part No. 34G1343 FV B 34G1342 FV B 34G1335BGE B 85G 666 1 15G8021 5 AUPC980AE...
  • Page 46 Power board PWPC1942AUA9 Main board CBPC980KS2AE Key board KEPC980KA8 Speakers 78G 332 1 L / 78G 332 1 R...
  • Page 47: Schematic Diagram

    Schematic Diagram For AU panel Analog and Digital Input CN301 DB15 PC5V VGA_CON D322 D323 TZMC5V6-GS08 TZMC5V6-GS08 FB304 R312 D319 D320 TZMC5V6-GS08 TZMC5V6-GS08 CN302 D321 TZMC5V6-GS08 RGB GND HSYNC VSYNC SYNC GND CLK_DDC2 DDC SCL DAT_DDC2 DDC SDA 1/3shield 2/4shield 0/5shield clk shield DAT0+...
  • Page 48: Tsu56Ak

    TSU56AK VPLL VDVI VDPLL U401 RIN0 GNDR RIN0M GIN0 GNDG GIN0M SOGIN0 BIN0 GNDB BIN0M HSYNC HSYNC0 VSYNC VSYNC0 DDC1_CLK/GPO8 DDC1_DAT/GPO7 CLK+ CLK- VDVI REXT   R403 390 1/16W REFP C401 TSU56AK 0.1uF REFM HWRESET HWRESETZ AdjBACKLITE PWM0 Volume PWM1 C402 22pF X401 14.318MHz...
  • Page 49: Power Supply

    Power Supply CN201 ON_OFF VCC12V VCC12V VCC5V VCC5V CONN VCC5V R203 220uF/25V   1/16W Brightness R204   1/16W   R205 4.7K 1/16W Q202 AdjBACKLITE C206 PMBS3904 1uF/25V VCC5V R214 delete R206   1/16W R207 4.7K onPanel_5V/3.3V   4.7K 1/16W VCC5V VCC12V R202 VCC12V...
  • Page 50: Panel Interface

    Panel interface PA[0..9] PA[0..9] PB[0..9] PB[0..9] LVA3P LVA3M LVACKP LVACKM LVB0M LVA2P LVB1M LVA2M LVB2M LVBCKM LVA1P LVB3M LVA1M LVA0M LVA1M LVA0P LVA2M LVA0M LVACKM LVB3P LVA3M LVB3M LVBCKP LVBCKM LVB2P LVB2M LVB1P LVB1M LVB0P LVB0M C509 47uF/16V CN503 RXO0- RXO0+ LVB0P RXO1-...
  • Page 51: Audio

    Audio CN204 R201 10K  R203 10K  33L8022-3A-H FEMALE R210 C211 100 pF CN202 WAFER 2*7P 2.54mm VOLUME C204 0.47uF C206 0.47uF R212 VOLUME 220K  STBY MUTE R211 C212 + C209 + C210 C213 100 pF 1.0uF 1.0uF 0.1uF OUT_L OUT_R +12V MUTE C202...
  • Page 52: Power Board (Adapter +Inverter)

    Power board (adapter + inverter)