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Acer AL1917 Service Manual

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Acer AL1917
Service Guide

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  • Page 1 Acer AL1917 Service Guide...
  • Page 2 Service Guide Version and Revision Version Release Date Revision TPV Model Name Apr.-20-06 Initial release T986KA5HKGAEAP...
  • 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: Special Notes On Lcd Monitors

    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

    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 7: Chapter 1 Monitor Features

    Chapter 1 Monitor Features Introduction Scope This specification defines the requirements for the 19” MICROPROCESSOR based Multi-mode supported high resolution color LCD monitor. This monitor can be directly connected to general 15 pin D-sub VGA connector. It also supports VESA DPMS power management and plug & play function. There is a build-in stereo audio amplifier with OSD control to drive a pair of speakers.
  • Page 8: Electrical Requirements

    Electrical Requirements Standard Test Conditions All tests shall be performed under the following conditions, unless otherwise specified. - Warm up time > 30 min. - AC supply voltage 230V± 5%, 50± 3 Hz 20°C ± 5°C - Ambient temperature 65% ± 20% - Humidity - Display mode 1280x1024, 60 Hz, all white...
  • Page 9: Lcd Monitor General Specification

    LCD Monitor General Specification Items Description Driving system TFT Color LCD Panel M190EN04 V5 Size 48 cm(19") Pixel pitch 0.294 mm( H ) × 0.294 mm( V ) LCD Panel Brightness 270 cd /m2 (Typical) Contrast 550:1 (Typical) Viewable angle 140°...
  • Page 10: Lcd Panel Specification

    LCD Panel Specification LCD Panel Model Items Unit Specifications Screen Diagonal [mm] 480 (19.0”) Active Area [mm] 376.32 (H) x 301.06 (V) Pixels H x V 1280(x3) x 1024 Pixel Pitch [mm] 0.294 (per one triad) x 0.294 Pixel Arrangement R.G.B.
  • Page 11: Optical Specifications

    Optical Specifications Measuring Condition: Ta = 25°C.
  • Page 12: Supported Timing

    Supported Timing 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. 85Hz refresh rate Support Monitor should display 85Hz refresh rate mode as emergency mode. Monitor should display “ Out of Range” warning menu at this mode.
  • Page 13: Block Diagram

    Monitor Block Diagram The LCD MONITOR will contain a main board, a power board, 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. Flat Panel and CCFL Drive.
  • Page 14: Main Board Diagram

    Main Board Diagram Panel Interface (CN101) Flash Rom TSUM16AK (U402) (Include ADC, OSD) (U401) OSD Control Interface (Key pad) EPR_SDA Hsync EPR-SCL Vsync D-Sub EEPROM Connector (U403) (CN405) DB15_SDA DB15_SCL EEPROM (U404)
  • 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 Part Number Description U201 090G6093 1 HEAT SINK U401 056G 562100 TSUM16AK U702 056G 563 21 AP1084K33LA U406 056G 643 5A MAX810 STRG U404 056G1133 34 M24C02-WMN6TP U403 056G1133 56 M24C16-WMN6TP CN901 087G 501 32 S AC SOCKET CN902 095G8014 12 42...
  • Page 18: Front Bezel

    Front Bezel 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 19: Installation Instructions

    Installation Instructions Swivel Base Adjusting The Viewing Angle · For optimal viewing it is recommended to look at the full face of the monitor, then adjust the monitor’s angle to your own preference. · Hold the stand so you do not topple the monitor when you change the monitor’s angle. ·...
  • Page 20: 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. •...
  • Page 21: Adjusting The Picture

    cloth lightly dampened with a mild detergent solution. Never use strong solvents such as thinner, benzene, or abrasive cleaners, since these will damage the cabinet. As a safety precaution, always unplug the monitor before cleaning it. Adjusting the Picture a. How to Adjust the Setting 1.
  • Page 22 b. The Description For Control Function Main Menu Sub Menu Sub Menu Item Description Icon Icon Contrast Contrast from Digital-register. Brightness Backlight Adjustment Focus Adjust Picture Phase to reduce Horizontal-Line noise Clock Adjust picture Clock to reduce Vertical-Line noise. H. Position Adjust the horizontal position of the picture.
  • Page 23 Main Menu Menu Sub Menu Description Icon Item Icon Auto Config Auto Adjust the H/V Position, Focus and Clock of picture. (Analog-Only Model) Show the resolution, H/V frequency and input port of current Information input timing. Clear each old status of Auto-configuration and set the color Reset temperature to Cool.
  • Page 24: Hot-Key Menu

    Hot-Key Menu a. Outline OSD Message b. The Description For OSD Message Item Description Auto Config When Analog signal input, if User Press Hot-Key “Auto”, will show Please Wait This message, and the monitor do the auto config function. When the Hsync Frequency, Vsync Frequency or Resolution is out of Input Not The monitor support range will show this message.
  • Page 25: 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 DDC2B Feature This monitor is equipped with VESA DDC2B 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 26: Chapter 3 Machine Disassembly

    Chapter 3 Machine Disassembly This chapter contains step-by-step procedures on how to assemble the monitor for maintenance. The tools for disassemble: Screws-Driver Resinous slice (Use to separate the front cover and the rear bezel ) Special tool (Be used to remove the VGA/DVI SCREWS) Disassembly Procedure Disassemble the base...
  • Page 27 Fig(2) Fig (3) Fig(4)
  • Page 28 Disassemble the rear bezel Remove four screws mark in red to remove back cover. (Fig 5-7) Fig (5) Fig (6)
  • Page 29 Fig (7) Disassemble the shield 1. Remove four screws mark in red to remove the shield. (Fig 8-9) (Remove the shield as arrow direction). Fig (8)
  • Page 30 Fig (9) Disassemble the main board (Fig 10-12) 1. Remove three screws mark in red to remove main board. 2. Remove two screws mark in red to remove audio board. 3. Remove five screws mark in red and remove AC-BKT with green to remove Power board. 4.
  • Page 31 Fig(11) 5. Remove one screws mark in red to remove Key board. Fig(11-12) Fig(11) Fig(12)
  • Page 32 Disassemble the front cover (Fig 13) 1. Pay attention to some hooks, then open it with little force till the front cover and Panel frame separated. 2. The position marked with ellipse exists some hooks. Fig (13) left right Fig (14)
  • Page 33 bottom bottom Fig(15) Fig (16) Fig (17)
  • Page 34: Chapter 4 Troubleshooting

    Chapter 4 Troubleshooting This chapter provides troubleshooting information for the AL1917: 1. No picture (LED orange) No picture The button if under Check reset circuit of control U406 is normal Check Correspondent Replace U402 Measure Q702 D701 -1.8V component U702 PIN2=3.3V...
  • Page 35 White screen White screen Measure Q704 base X401 oscillate waveform is normal is high level?5V Replace X401 Check Q706,is broken or Check reset circuit of CN405 solder? U406 is normal Check Correspondent Check Correspondent component. component. Replace U406 Replace PANEL...
  • Page 36 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 37 2. PWPC No Power No power Check AC line volt 110V or 220V Check AC line Check the voltage of C907(+) Check F901, bridge rectified circuit Check start voltage for the pin8 of IC901 Check R905, IC901 Output short Check the auxiliary voltage is between 10V-27.5V Check IC901,T901 Q900,RJ901,R912 Check D920, D921, IC902...
  • Page 38 No Backlight Check VDDA,ENA VDD A = 4.75 ~ 5.25 V,ENA<3V Check On/Off loop Circuit Connect Timer (Pin 3) to GND Check ENA(pin10),OVPT(pin7),CT(pin13), DRV1(pin1),DRV2(pin15) of IC801 Check half bridge power conversion Change IC801 circuit and transformer output circuit. Check ISEN (pin 5) normally Check ISEN loop components End Striking function debug Check VSEN (pin 6) of IC801...
  • Page 39: Chapter 5 Connector Information

    Chapter 5 Connector Information The following figure shows the connector locations on the main board: Pin No. Description Pin No. Description Red Video Green Video Logic Ground Blue Video Monitor Ground Monitor Ground DDC-Serial Data DDC-Return H-Sync R-Ground V-Sync G-Ground DDC-Serial Clock B-Ground...
  • Page 40: Chapter 6 Fru (Field Replacement Unit) List

    FRU parts for repair and service of customer machines. 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.
  • Page 42 Part List Above picture show the description of the following component. Item Picture Part No. Q34G0002 RX 1B 033G4868 RX L Q34G0001 QWA1B Q15G8313AER 1 Q85G0001 1 S...
  • Page 43: Schematic Diagram

    Chapter 7 Schematic Diagram Main board CONTENTS REVISION HISTORY SCHEMATIC SHEET Date Author SHEET Comments Preliminary 03/02/05 Contents ADD_KEY_A,KEY_B,KEY_C function power pinэ   25 PIN 03/16/05 POWER ADD_R484&R485 pull high INPUT CN406_PCB 竚いみ┕オ簿0.5mm 04/01/05 SCALAR PANEL INTERFACE Add_FB410~FB412,U406 D-SUB_pin4&pin11_NC 04/26/05 U402 PIN-3 э,CN404いみ翴┕狾娩簿1mm,Q702э  SOT-223 Type 05/09/05 05/26/05  эPCB Layout,  EMI癸郸~...
  • Page 44 TSUM16AK SCHEMATIC XGA/SXGA LVDS OUTPUT GNDR GNDR GNDG GNDG GNDB GNDB HSYNC HSYNC VCC1.8 VCC3.3 +12V VSYNC VSYNC DDCA_SDA DDCA_SDA DDCA_SCL DDCA_SCL DET_VGA DET_VGA DDC_WP DDC_WP VCC1.8 Vcc3.3 +12V CLK+ CLK+ CLK- CLK- DDCD_SDA DDCD_SDA DDCD_SCL DDCD_SCL DET_DVI DET_DVI 3.INPUT PA[0..7] PA[0..7] PA[0..7]...
  • Page 45 SOT-223 U701 VCTRL +3V3 NC/LT1117-18 R702 +3V3   1/16W C701 C703 C704 VCC1.8 100uF/25V C702 VCC1.8 4.7uF/16V D701 BL_ADJ(DC) 0V ~ 3.3V 4.7K 1N4148 0V ~ 5V 4.7K 4.7K MMBT3904 R703 Q702 BL_ADJ   1/16W P W M D702 CHT2907 1N4148 C705 1uF/16V...
  • Page 46 CN405 FB410 1/16W   DB15 RED+ R434   1/16W C432 0.047uF RED- GREEN+ FB411   1/16W R435   1/16W C433 0.047uF GREEN- BLUE+ FB412 1/16W R436 1/16W C434 0.047uF     BLUE- PC5V R437   1/16W C435 0.047uF PC5V R438 VGA_CON 1/16W  ...
  • Page 47 VDVI VMPLL VPLL AVDD VDDP VDDC VCC1.8 FB401 VDDC VCC3.3 FB402 AVDD VCC1.8 600 OHM VCC3.3 600 OHM C403 C407 U401 VCC3.3 4.7uF/16V 0.1uF VCTRL VCTRL C404 C405 C406 0.1uF 0.1uF 0.1uF NC/LVACKP/NC RIN0P NC/LVACKM/NC GNDR RIN0N RA1P/LVA2P/RA2 R489 R490 GIN0P RA1N/LVA2M/RA3 GNDG...
  • Page 48 PB[0..5] PB[0..5] CN102 CN103 PA[0..7] RB1P PA[0..7] PA[0..7] RB1N PA[0..7] LVACKP FB0N RB2P RA3N RB3N LVACKM FB0P RA1P RB2N RA3P RB3P LVA2P RA1N RB3P RA2P LVA2M FB1N RB3N RA2N RB2N LVA1P FB1P RA2N RA2P RB2P LVA1M PB[6..11] RA3P PB[6..11] LVA0P RA3N RA1N FB2N...
  • Page 49: Power Board

    Power board R951   1/8W R952 C920 BD901   1/8W 0.001uF/500V R953 2A 600V   1/8W D920 J901 SBT150-10LS TIN COATED L921 T901 3.5UH F902 1/8W   J902 +12V TIN COATED C922 C923 C924 R909 680uF/25V 680uF/25V 680uF/25V C925 R931 L902 100K  ...
  • Page 50 RJ802 PT801 CN801 RJ801   1/8W RJ803 80GL17T-36-DN   1/8W   1/10W RJ804 1/8W   R836 C835   1/10W +12V C816 10PF/3KV 33G8021-2D-U 0 ohm CN802 R802 R804 R805 300K 1/8W   N.C C828   1/8W   1/8W 0.1uF/50V C811 Q802 470UF/25V C817...
  • Page 51: Key Board

    Key Board VCC3.3 CN101 POWER ON/OFF KEY1 KEY2 R117 R118 KEY3 KEY4 LED ORANGE NC 1/16W NC 1/16W LED GREEN KEY2 R113 NC 1/16W KEY_AUTO SPKR_R- R103 0 1/16W VCC3.3 SPKR_R+ R114 NC 1/16W KEY_RIGHT SPKR_L- R104 0 1/16W SPKR_L+ R111 NC 1/16W CONN12...