Acer AL1922 Service Manual
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Acer AL1922 Service Manual

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Acer AL1922
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  • Page 1 Acer AL1922 Service Guide...
  • Page 2 Service Guide Version and Revision Version Release Date Revision Jan.07, 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

    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 ………………………………………...

  • Page 9: Chapter 1 Monitor Features

    This will alleviate the growing health concerns. It is also a space saving design, allowing more desktop space, and comparing to the traditional CRT monitor, it consumes less power and gets less weight in addition MTBF target is 50k hours or more. Chart of AL1922 19" Samsung LTM190EX-L01 Panel 19”...

  • Page 10: Electrical Requirements

    Electrical Requirements Standard Test Conditions All tests shall be performed under the following conditions, unless otherwise specified. 225 lux Ambient light 40 cm in front of LCD panel Viewing distance Warm up time All specifications 30 minutes Fully functional 5 seconds Chroma 7120 signal generator or equivalent, directly Measuring equipment Connected to the monitor under test.

  • Page 11: Lcd Monitor General Specification

    LCD Monitor General Specification 19 “ active matrix color TFT LCD Panel type SAMSUNG LTM190EX-L01 AU M190EN04 V5 Display size 376.32mm (H) × 301.056mm(V) Display mode VGA 640 × 480 (60//72/75 Hz) SVGA 800 × 600 (56/60/72/75 Hz) XGA 1024 × 768 (60/70/75 Hz) SXGA 1280 ×...

  • Page 12: Lcd Panel Specification

    LCD Panel Specification LCD Panel Model (SAMSUNG LTM190EX-L01) Display Type active matrix color TFT LCD Resolution 1280x1024 pixels Display Dot 1280x (RGB) x 1024 Display Area 376.32mm(H) x 301.056mm(V) Pixel Pitch 0.294mm(H) x 0.294mm(V) Display Color 16.7M (true) Lamp Frequency 80kHz Lamp Current 7.0 mArms (typ)

  • Page 13: Support Timing

    Supported Timing VESA MODES Horizontal Vertical Nominal Nominal Nominal Sync Sync Pixel Mode Resolution Frequency Freq. Polarity Polarity Clock +/- 0.5kHz +/- 1 Hz (MHz) 640x480@60Hz 31.469 59.940 25.175 640x480@72Hz 37.861 72.809 31.500 640x480@75Hz 37.500 75.00 31.500 800x600@56Hz 35.156 56.250 36.000 800x600@60Hz 37.879...
  • Page 14 Video Input Connector PIN NO. DESCRIPTION PI N NO. DESCRIPTION Green Logic Ground Blue Monitor Ground Monitor Ground DDC-Serial Data DDC-Return H-Sync R-Ground V-Sync G-Ground DDC-Serial Clock B-Ground VGA Connector layout PIN NO. DESCRIPTION PIN NO. DESCRIPTION TMDS Data 2- TMDS Data 2+ +5V Power TMDS Data 2/4 Shied...

  • Page 15: 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 16: Main Board Diagram

    Main Board Diagram LCD Interface EEPROM 24C16 Scaler TSU16AK Crystal (Include: ADC, OSD etc) 14.318MHZ D-SUB Connector Connector OSD Control Interface (Keypad) EEPROM EEPROM 24C02 24C02...

  • 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 Component U301 M24C02-WMN6T SMT U302 M24C02-WMN6T SMT U601 56L1125137AZ4 X401 CRYSTAL 14.318MHz U401 SCALER IC TSU16AK X601 20MHZ U201 AZ1117D-1.8 U202 AIC1084-33CM U603 MAX810STR SOT-23 U602 M24C16-WMN6T/W SO-8 CN301 D-USB 15PIN CN302 DVI 24PIN...
  • Page 19 The step between front bezel and back cover shall be within specification. Top and Bottom Left and Right Back cover & Bezel concavity Back cover & Bezel concavity 0.8mm ≤ A ≤ 1.3 mm 0.8mm ≤ A ≤ 1.3 mm Back Cover &...
  • Page 20 Top and Bottom Left and Right Back cover & Bezel step Back cover & Bezel step 0mm ≤ D ≤ 0.8 mm 0mm≤ D ≤ 0.8 mm LCD Horizontally The angle between front bezel and LCD unit in bottom side should not large than 1.0mm.
  • 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 POWER KEY MENU/ENTER Auto Adjust Key/Exit...

  • Page 23: Rear Bezel

    Rear Bezel Item Description D-SUB CABLE DVI CABLE AUDIO CABLE AC POWER CORD...

  • Page 24: Chapter 2 Operating Instructions

    Chapter 2 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. • 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 Menu Description Item Icon Icon Contrast Contrast from Digital-register. Brightness Backlight Adjustment Adjust Picture Phase to reduce Horizontal-Line Focus noise Clock Adjust picture Clock to reduce Vertical-Line noise. H. Position Adjust the horizontal position of the picture.
  • Page 29 Main Sub Menu Menu Menu Description Item Icon Icon Auto Config Auto Adjust the H/V Position, Focus and Clock of picture. (Analog-O nly Model) Analog Select input signal from analog (D-Sub) (Dual-Inpu Digital Select input signal from digital (DVI) t Model) Show the resolution, H/V frequency and input port Information of current iput timing.

  • Page 30: Hot-Key Menu

    Hot-Key Menu a. Outline b. The Description For Hot-Key Function Item Operation Icon Description When the OSD is closed, press Volume of Audio adjustment. The Volume Left or Right button will be Audio will be Mute when volume=0 Volume Hot-Key Function OSD Message a.

  • 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 Remove hinge cover. (Fig 1) Remove four screws to release stand base. (Fig 2) Fig 1 Fig2...
  • Page 33 Disassemble the front cover Remove nine 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) 6.
  • Page 34 Fig 4 Fig 5...
  • Page 35 Fig6 Fig 7...
  • Page 36 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 37 Disassemble the audio board Remove two screws to release audio board. (Fig 9) 2. Remove connector wire with audio board and power board. (Fig 10) Fig9 Fig10...
  • Page 38 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) Fig11 Fig12...
  • Page 39 Fig13...
  • Page 40 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) Fig14 Fig15...
  • Page 41 Disassemble the panel 1. Remove four screws (right and left) to release metal frame. (Fig 16) Fig16...

  • Page 42: Chapter 4 Troubleshooting

    Chapter 4 Troubleshooting This chapter provides troubleshooting information for the AL1922: 1. 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 power section Measure U701 PIN2=1.8V...
  • Page 43 2. No picture (LED is orange) No picture Measure U701 PIN2=1.8V U702 PIN2=3.3V Replace U701, U702 X401 oscillate waveforms are normal Replace X401 Check if the sync signal from computer is output and video cable is connected normally Input the sync signal of computer, or change the cable Replace U401...
  • Page 44 3. Panel Power Circuit Measure Q402 base is high level? Measure U701 PIN2=1.8V U702 PIN2=3.3V Check Q402 and Q401 are Replace U701, U702 broken or CN401 solder? X401 oscillate waveforms are normal Check Correspondent component. Replace X401 Replace PANEL Replace U401...
  • Page 45 4. Keypad Board OSD is unstable or not working Connect Keypad Board Is Keypad board connecting normally Is Button Switch normally Replace Button Switch Is Keypad board normally Replace Keypad Board Check main board...
  • Page 46 5. PWPC No Power No power Check AC line volt 110V or 220V Check AC line Check the voltage of C905(+) Check F901, bridge rectified circuit Check start voltage for the pin3 of IC901 Check R906, R907,IC901 Check the auxiliary voltage is between 10V-16V Check IC901,T901 Check ZD901, D903 Check D910, D911, IC902...
  • Page 47 No Backlight Check C201 (+) =12V Change F902 Check D201/Q209/Q210/ D202/Q211/Q212 Check ON/OFF signal Check Interface board Check U201 pin9=12V ? Change Q201 or Q202 Check the pin1 of U201 have saw tooth wave Change U201 Check D201(-), D202(-) have the output of square wave at short time. CheckQ205/Q207/Q203/Q201or /Q206/Q208/Q204/D202 Check the resonant wave of pin2 &...
  • Page 48 6.No Audio Mute and volume setting is ok? Reset mute and volume Check power supply of U201 is 12? Check connecting is ok? Check input signal of U201is ok? Reconnect Check correspondent component Replace U201 Replace speaker...

  • Page 49: Chapter 5 Connector Information

    Chapter 5 Connector Information The following figure shows the connector locations on the monitor board: 15 – Pin Color Display Signal Cable (D-sub) PIN NO. DESCRIPTION PI N NO. DESCRIPTION Green Logic Ground Blue Monitor Ground Monitor Ground DDC-Serial Data DDC-Return H-Sync R-Ground...

  • Page 50: 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 AL1922.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 51: Exploded Diagram

    Exploded Diagram (Model: AL1922)
  • Page 52 Part List Item Picture Description Part No. 33L4744 GD L/33L4743 Hinge cover GD L Stand base 34L1337 GD B Front cover 34L1335AGD B Rear cover 34L1336AGD 2B Shield 85L 666 1 Metal frame 15L8021 5 Panel 750LLS90EX1 Audio board AUPC780AE...
  • Page 53 Power board PWPC1942SEA2 Main board CBPC980KSVAF Key board KEPC980KA8 78L 332 1 L/78L 332 Speakers...

  • Page 54: Chapter 7 Schematic Diagram

    Chapter 7 Schematic Diagram 1. For Samsung panel Analog and Digital Input CN101 RX2-IN R137 　 1/16W A_GND RX2- RX2+IN R138 　 1/16W RX2+ SGND R101 　 1/16W SCL_IN DDCCLK R102 1/16W SDA_IN 　 DDCDAT A_VSYNC RX1-IN R139 1/16W 　 RX1- RX1+IN R140...

  • Page 55: Gm5321

    GM5321 C201->C449 C202->C452 C203->C453 C204->C454 C205->C455 1.8V_CVDD Close to respective power Pins +1.8V FB401 120 OHM C452 C453 C454 C455 C406 C407 C408 C449 1.8V_AVDD 10uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 1.8V_DVI 1.8V_PLL 1.8V_CVDD 3.3V_LVDS +3.3V 1.8V_DVI FB402 120 OHM C410 C411...

  • Page 56: Lvds

    LVDS CN401 CON24A LV_O[0..9] RXO0- RXO0+ RXO1- RXO1+ LV_O0 RXO0- RXO2- RXO2+ LV_O1 RXO0+ RXO1- RXOC- RXOC+ LV_O2 LV_O3 RXO1+ RXO3- RXO3+ LV_O4 RXO2- RXE0- RXE0+ LV_O5 RXO2+ RXE1- RXE1+ RXE2- RXE2+ RXOC- LV_O6 RXEC- RXEC+ RXOC+ LV_O7 RXE3- RXE3+ LV_O8 RXO3- LV_O9...

  • Page 57: Key Board Connector/Dc Power

    Key Board Connector/ DC Power +12V +3.3V VCC5V+ CN701 R716 VCC5V+ +3.3V ON_OFF D710 PBIAS TO-252 TO-263 SMAL140 VCC12V VCC12V 4.7K 　 1/16W C704 U702 +1.8V VCC5V+ U701 AIC1084-18CM D709 0.1uF VOUT +1.8V SMAL340XXXRO C708 + C709 C710 C705 C706 C707 CONN 0.1uF...

  • Page 58: Audio

    Audio OUT_L OUT_R +12V CN202 WAFER 2*7P 2.54mm MUTE VOLUME C202 C201 C203 470uF/16V 470uF/16V 0.1uF U201 TDA7496L CN204 C205 CN203 C204 0.47uF R201 10K　 OUTL 470uF/16V C206 0.47uF OUTR R203 10K　 R212 C207 VOLUME 33L8022-3A-H FEMALE 470uF/16V 220K　 WAFER 4P2.0 R/A STBY VAROUT_R R207...

  • Page 59: Power Board (Adapter +Inverter)

    power board (adapter + inverter) R919 47_1/2W_M R920 C913 47_1/2W_M 102P_500V +12V D910 F902 MOSPEC20100 5A/24V/1206 L903 V12A T901 73L-253-91L PQ26/22.5 FB902 BD901 R906 R904 C906 R903 GBU405 1M/1206 1M/1206 152P/1KV 100K_2W C916 V12B D911 C914 C915 470UF/16V C905 MOSPEC20100 2200UF/16V 2200UF/16V C917...
  • Page 60 J201 JUMPER1 Q203 V12A L201 C215 CN201 120UH 22pF/3KV + C201 C216 C202 D201 R224 R225 22pF/3KV 220uF/25V R214 R212 D203 1K　 1K 　 CN202 0.1uF/25V SR24 C225 3.9K　 RLZ11B Q202 1uF/25V 2.2K 1/16W 　 SI4431DY-T1 PT201 C227 DTA144WKA R220 C213 R243 Q205...
  • Page 61 3.3V Q101 L101 FB101 IC102 R114 AIC1084-33CT 　 1/16W Q102 R116 Vout PMBS3904 3.6K 1/16W 45uH 　 BEAD C101 C106 470uF/16V R113 R115 R104 　 1/16W 　 1/16W AO4411 470uF/16V C107 C108 470uF/16V Q103 C103 D101 0.1uF/25V C109 C110 PMBS3906 1000uF/16V SR54 470uF/16V...

  • Page 62: For Au Panel

    2. For AU panel Analog And Digital Input CN301 DB15 FB301 　 1/16W R301 　 1/16W C304 0.047uF FB302 　 1/16W R302 　 1/16W C305 0.047uF FB303 　 1/16W R303 　 1/16W C306 0.047uF R304 　 1/16W C307 0.001uF PC5V R325 C301 C302...
  • Page 63 TSU56AK VCC3.3 FB401 VCC2.5 FB402 VCC3.3 VCC2.5 600 OHM 600 OHM C405 C414 10uF/16V 10uF/16V VPLL VDVI VDPLL C406 C407 C408 C409 C410 C411 C412 C413 C415 C416 C417 C418 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF U401...
  • Page 64 LVDS PA[0..9] PA[0..9] LVA3P CN503 LVA3M LVACKP LVACKM LVB0M RXO0- RXO0+ LVB0P LVA2P LVB1M RXO1- RXO1+ LVB1P LVA2M LVB2M RXO2- RXO2+ LVB2P LVBCKM RXOC- RXOC+ LVBCKP LVA1P RXO3- RXO3+ LVB3M LVB3P LVA1M LVA0M RXE0- RXE0+ LVA0P LVA1M RXE1- RXE1+ LVA1P LVA0P LVA2M RXE2-...
  • Page 65 MCU/ Key Board Connector VCPU VCPU RN601 R601 R602 C601 RN602 1/16W 　 　 1/16W 　 1/16W 0.1uF 　 1/16W C602 22pF U601 X601 POWER EA/VP P0.0 ENTER P0.1 RIGHT XTAL1 P0.2 C603 20MHz LEFT P0.3 10uF/16V VCPU AUTO P0.4 U603 MAX810STR (NC) LED_B...
  • Page 66 power VCC5V+ VCC5V SOT-252 D202 U201 VCC12V R202 GS1D VCC2.5 VCC12V RT9164 CN201 　 1/16W VCC2.5 ON_OFF R201 4.7K 　 1/16W C210 C211 C212 VCC12V VCC12V D201 SS14 C201 R212 4.7K 　 1/16W 0.1uF 47uF/16V 0.1uF VCC5V+ VCC5V VCC5V VCC5V onBACKLITE 6 0.1uF Q201...
  • Page 67 Audio OUT_L OUT_R +12V CN202 WAFER 2*7P 2.54mm MUTE VOLUME C202 C201 C203 470uF/16V 470uF/16V 0.1uF U201 TDA7496L CN204 C205 CN203 C204 0.47uF R201 10K　 OUTL 470uF/16V C206 0.47uF OUTR R203 10K　 R212 C207 VOLUME 33L8022-3A-H FEMALE 470uF/16V 220K　 WAFER 4P2.0 R/A STBY VAROUT_R R207...
  • Page 68 power board (adapter + inverter) R919 47_1/2W_M R920 C913 47_1/2W_M 102P_500V +12V D910 F902 MOSPEC20100 5A/24V/1206 L903 V12A T901 73L-253-91L PQ26/22.5 FB902 BD901 R906 R904 C906 R903 GBU405 1M/1206 1M/1206 152P/1KV 100K_2W C916 V12B D911 C914 C915 470UF/16V C905 MOSPEC20100 2200UF/16V 2200UF/16V C917...
  • Page 69 J201 JUMPER1 Q203 V12A L201 C215 CN201 120UH 22pF/3KV + C201 C216 C202 D201 R224 R225 22pF/3KV 220uF/25V R214 R212 D203 1K　 1K 　 CN202 0.1uF/25V SR24 C225 3.9K　 RLZ11B Q202 1uF/25V 2.2K 1/16W 　 SI4431DY-T1 PT201 C227 DTA144WKA R220 C213 R243 Q205...
  • Page 70 3.3V Q101 L101 FB101 IC102 R114 AIC1084-33CT 　 1/16W Q102 R116 Vout PMBS3904 3.6K 1/16W 45uH 　 BEAD C101 C106 470uF/16V R113 R115 R104 　 1/16W 　 1/16W AO4411 470uF/16V C107 C108 470uF/16V Q103 C103 D101 0.1uF/25V C109 C110 PMBS3906 1000uF/16V SR54 470uF/16V...

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