Acer AL1912 AL1912 Service Guide
Acer AL1912 Manual
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- Acer AL1912 | AL1912 Service Guide - Page 1
Acer AL1912 Service Guide Service guide files and updates are available on the CSD web: for more information, Please refer to http://csd.acer.com.tw/ - 1 - - Acer AL1912 | AL1912 Service Guide - Page 2
purpose, 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, of its dealer) assumes the entire cost of all necessary servicing, repair, and any - Acer AL1912 | AL1912 Service Guide - Page 3
it will not be noted in the printed Service Guide, for 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 - Acer AL1912 | AL1912 Service Guide - Page 4
with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, Which can be determined by turning the - Acer AL1912 | AL1912 Service Guide - Page 5
. If you are not sure of the type of power supplied to your home, consult your dealer or local power company. The monitor is equipped with a three-pronged grounded plug, a plug with a third (grounding) pin. This plug will fit only into a grounded power outlet as a safety feature. If your outlet does - Acer AL1912 | AL1912 Service Guide - Page 6
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 - Acer AL1912 | AL1912 Service Guide - Page 7
...15 BLOCK DIAGRAM ...16 MONITOR BOARD LAYOUT ...17 SOFTWARE FLOW CHART ...18 GENERAL INSTRUCTIONS ...19 SYSTEM INSTALLATION ...20 POWER/INVERTOR BOARD ...25 ELECTRICAL SPECIFICATION...26 INVERTER ELECTRICAL SPECIFICATION ...28 SAFETY ...28 Chapter 2 Operating Instruction 30 CONTROLS ...30 MAIN - Acer AL1912 | AL1912 Service Guide - Page 8
Feature INTRODUCTION Chapter 1 Scope This specification defines the requirements for the 19" MICRO-PROCESSOR based Multi-mode supported high resolution color LCD monitor. This monitor can be directly connected to general 15 pin D-sub VGA connector and eliminates the requirement of optional special - Acer AL1912 | AL1912 Service Guide - Page 9
otherwise specified. Ambient light : 225 lux Viewing distance : 50 cm in front of LCD panel Warrn up time All specifications : 30 minutes Fully functional : 5 seconds Measuring Equipment : Chroma 2250 signal generator or equivalent, directly Connected to the monitor under test. Minolta - Acer AL1912 | AL1912 Service Guide - Page 10
LCD monitor General specification Panel Type: 19 " active matrix color TFT LCD 1). Fujitsu FLC48SXC8V-10 Display size: Display mode: Pixel pitch: Display Dot: Pixel Clock: Contrast ratio: θ = 0˚ Brightness: Response time (Tr/Tf): Display color: Viewing angle: Luminance Uniformity: Pc interface: - Acer AL1912 | AL1912 Service Guide - Page 11
Total output power: 60 Watt max. LCD Panel Specification LCD Panel Model (Hydis LT17E12-200) • Display Type • Resolution • Display Dot • Display Area • Pixel Pitch • Display Color • Lamp Voltage • Lamp Current • Weight • Optical Specifications active matrix color TFT LCD 1280x1024 pixels 1280x ( - Acer AL1912 | AL1912 Service Guide - Page 12
Color Sync input • Signal • Polarity Analog R, G, B. 75 ohm +/- 2% Positive 0 - 0.7 +/- 0.05 Vp same as LCD panel separate horizontal and vertical sync, or composite sync which are TTL compatible positive and negative. Interface frequency The following frequency range is generalized by supported - Acer AL1912 | AL1912 Service Guide - Page 13
Supported Timing TIMING 640x350 VGA-350 640x400 NEC PC9801 640x400 VGA-GRAPH 640x400 NEC PC9821 640X480 VESA- 36 312 135.00 36 248 108 38 248 135 38 Note: Mode 640x350, 640x400 and 720x400 will locate on middle position but cannot be expanded to full screen on vertical direction. - 13 - - Acer AL1912 | AL1912 Service Guide - Page 14
There will be 28 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. Video input - Acer AL1912 | AL1912 Service Guide - Page 15
The LCD monitor will contain an main board, an inverter/ power board, key board and internal adapter which house the flat panel control logic, brightness control logic and DDC. The inverter board will drive the backlight of panel and the DC-DC conversion. The Adapter will provide thr 12V DC-power to - Acer AL1912 | AL1912 Service Guide - Page 16
BLOCK DIAGRAM System Block Diagram LVDS Signals MCU MVPRL including ADC, Scaling LVDS And OSD function - 16 - - Acer AL1912 | AL1912 Service Guide - Page 17
Monitor board layout LABEL U1 U2 U4 U6 U5 U7 U8 U9 U10 U11 Component 74LVC14 24LVC21 MVPRL M8064I 24LC16B MAX810 SI9435 LM4838 APL1085-3.3 CE APL1117-2.5 VC LABEL CN1 CN9 CN3 CN301 CN302 CN7 Component D-SVB 15 PIN E&T 4501-10 E&T 6113-08 E&T 4501-11 E&T 4501-03 E&T DF14-30 - 17 - - Acer AL1912 | AL1912 Service Guide - Page 18
Software flow chart - 18 - - Acer AL1912 | AL1912 Service Guide - Page 19
should be connected. Connect the video cable from the monitor to the video card. Press the power button to turn on the monitor position. The power indicator will light up. AL1912 m External Controls 1 Auto Adjust Key/Exit 2 / Volume 4 MENU/ENTER 5 LED 6 / Power Key AL1912 - 19 - - Acer AL1912 | AL1912 Service Guide - Page 20
to the VGA port on your PC. Make sure connections are secure. Connecting the AC Power Connect the power cord to the LCD Monitor. Connect the power cord to an AC power source. Connecting the Audio Cable (For AL1912 m and AL1912 bm) Connect the audio cable to the " LINE OUT " jack on your PC's audio - Acer AL1912 | AL1912 Service Guide - Page 21
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 Left and Right Back cover & Bezel concavity 0.8mm ≤ A ≤ 1.3 mm Back Cover & Hinge Cover concavity 0mm ≤ B ≤ 0.5mm - 21 - - Acer AL1912 | AL1912 Service Guide - Page 22
Base & Neck concavity 0mm ≤ C ≤ 0.6mm Top and Bottom Back cover & Bezel step 0mm ≤ D ≤ 0.8 mm Left and Right Back cover & Bezel step 0mm ≤ D ≤ 0.8 mm - 22 - - Acer AL1912 | AL1912 Service Guide - Page 23
LCD Horizontally The angle between front bezel and LCD unit in bottom side should not large than 1.0mm. The distance of the LCD display unit from left side to right should not large than 4.0mm. - 23 - - Acer AL1912 | AL1912 Service Guide - Page 24
Tilt Base Rotation Tilt up 15 ± 2°/ down 5 ±2° Plastic Material For TCO99 Front Bezel PC+ABS Back Cover PC+ABS The Others ABS 94HB For MPRII Front Bezel ABS 94V-0 Back Cover ABS 94V-0 The Others ABS 94HB GAP Spec. Gap between panel with bezel is 0 mm < gap < 1.2 mm - 24 - - Acer AL1912 | AL1912 Service Guide - Page 25
POWER/Inverter Board Description This specification defined the performance and characteristic of power/inverter board. It supplies the following outputs : 1). 5Vdc: Logic power. 2). 5Vaudio: Audio power. 3). 15Vinv: Inverter power. Features Input Voltage: 100 ~ 240 ±10％Vac Input current: 1.2Amax. - Acer AL1912 | AL1912 Service Guide - Page 26
2.Inverter-side connecter : SM02B-BHSS-1-TB(JST) for AL1912 m PIN NO. 1 2 / SM02(8.0)B-BHS-1(JST) for AR599 or equivalent. Function Cth Ctl Comment VBLH(High voltage) VBLL(Low voltage) Electrical Specification: AC-DC Electrical specification Input Specification No Item 1 Input Voltage - Acer AL1912 | AL1912 Service Guide - Page 27
AC-DC Output Specification Tolerance Output Current Output Voltage --- MIN MAX +5Vdc +5 /-3 % 0. Regulation --- output @50% duty of 1MHz (min.) 0.6A 1% 3% ±5% Over / Under Shoot @ Power line on/off --- ±5% *+5Vdc load regulation test: the +15Vinv loading at 2.0A *+15Vinv load - Acer AL1912 | AL1912 Service Guide - Page 28
Inverter Electrical Specification: For Fujitsu FLC488SC8V-10 (AL1912 m) Condition Min. Input Voltage --- --- Input Current --- --- Backlight ON/OFF Control ON OFF Brightness Adjust Min. Luminance / Max. --- Luminance Output Voltage Vin=15V, Iout=6.5mA --- Brightness lamp current - Acer AL1912 | AL1912 Service Guide - Page 29
Ground 13 H-Sync. 6 Red Ground 14 V-Sync. 7 Green Ground 15 Serial Clock for DDC 8 Blue Ground - Audio : Monitor rear side : -PC I/P for PC : 3.5mm Stereo female Monitor Control Keys KEY : Power , Menu , Adjust +/- , Vol +/-, Auto Position Of Controls Position of all switches - Acer AL1912 | AL1912 Service Guide - Page 30
OFF switch, push to ON and push to OFF. (Toggle switch) 2. Power LED will be blue when monitor is on; be amber when in power saving mode. 3. Menu. 4. Adjust increase (Function select). Adjust decrease (Function select). 5. Auto adjustment Buttons. Note: 1. Press button 4 (plus +) or (minus -) at the - Acer AL1912 | AL1912 Service Guide - Page 31
the horizontal position of the 0-100 Do Auto Config picture. V. Position Adjust the verticalposition of the 0-100 Do Auto Config picture. Warm N/A Recall Warm Color Temperature N/A The Color from EEPROM. Temperature will be Cool N/A Recall Cool Color Temperature from N/A set to Cool - Acer AL1912 | AL1912 Service Guide - Page 32
100 OSD. Adjust the OSD timeout. 10-120 Auto Adjust the H/V Position, Focus N/A and Clock of picture. Show the resolution, H/V frequency N/A and input port of current iput timing. Clear each old status of N/A Auto-configuration and set the color temperature to Cool. Exit OSD N/A 100 100 - Acer AL1912 | AL1912 Service Guide - Page 33
: Item Auto Config Please Wait Input Not Supported Cable Not Connected No Signal Description When User Press Hot-Key "Auto", will show this message, and the monitor do the auto config function. When the Hsync Frequency, Vsync Frequency or Resolution is out of the monitor support range, will show - Acer AL1912 | AL1912 Service Guide - Page 34
LOGO: When the monitor is power on, the LOGO will be showed in the center. Item of Factory menu Vendor may customize design and add adjustment items Factory menu as far as all required items are included. 1) Bright Adjust Brightness and Contrast value to Max. 2) Auto Balance Adjust each R, G, B - Acer AL1912 | AL1912 Service Guide - Page 35
this monitor, following a time-out period, will automatically switch to an OFF mode. This reduces the monitor's internal power supply consumption. After the video input signal is restored, full power is restored and the display is automatically redrawn. The appearance is similar to a "Screen Saver - Acer AL1912 | AL1912 Service Guide - Page 36
follow "Microsoft Windows Color Quality Specification for Liquid Crystal Display OEM's". (http://www.microsoft.com/hwdev/tech/color/ColorTest.asp) Audio Technical specification (For AL1912 m only) General Description: Output power Total harmonic distortion Input signal sensitivity Input impedance - Acer AL1912 | AL1912 Service Guide - Page 37
ratio Total harmonic distortion Cross talk Output Watt. Volume Control Audio Input Freq. Spec. Comment Min. Typ. Max. - 0.5Vm - s - - - 0.5W Volume Max.,load 4 Ω - - - Analog Speakers Maximum power Impedance Frequency response range Total harmonic distortion : 2 W per speaker(max) : - Acer AL1912 | AL1912 Service Guide - Page 38
Chapter 3 Machine Disassembly and Replacement Disassembly Procedure Disassemble the base 1. Remove the neck cover. 2. Remove the four screws to release the hinge. 3. Remove the base Disassemble the chassis 1. Remove the four screws to release the back cover. 2. Remove the two screws to release the - Acer AL1912 | AL1912 Service Guide - Page 39
release the main board. Disassemble the power board 1. Disassemble two voltage lines from power board. 2. Remove the one screw to release line from Chassis. 3. Remove the three screws from Chassis. 4. Remove the two screws to release power board from Chassis. 5. Then take the power board from the - Acer AL1912 | AL1912 Service Guide - Page 40
Disassemble the speakers 1. Remove the two screws to release line and VK board from bezel. 2. Remove the two screws to release line and chassis from bezel. 3. Remove the four screws from bezel. 40 - Acer AL1912 | AL1912 Service Guide - Page 41
Troubleshooting Main Procedure Chapter 4 41 - Acer AL1912 | AL1912 Service Guide - Page 42
Power Circuit and Backlights Troubleshooting 42 - Acer AL1912 | AL1912 Service Guide - Page 43
Performance Troubleshooting 43 - Acer AL1912 | AL1912 Service Guide - Page 44
Function Troubleshooting 44 - Acer AL1912 | AL1912 Service Guide - Page 45
Connector Analog Video input Connector: 15pins mini D-Sub Table 2.4.5. Pin assignment for D-sub connector Chapter 5 Separate Sync 5 10 15 PIN NO. 1 1 RED VIDEO 2 GREEN VIDEO 6 3 BLUE VIDEO 11 4 GROUND 5 GROUND 6 RED GROUND 7 GREEN GROUND 8 BLUE GROUND 9 PC5V (+5V DDC) 10 - Acer AL1912 | AL1912 Service Guide - Page 46
will not be noted in the printed Service Guide. For ACER-AUTHORIZED CERVICE 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 local FRU list provided by your regional Acer office to order FRU parts repair - Acer AL1912 | AL1912 Service Guide - Page 47
Model: AL1912 47 - Acer AL1912 | AL1912 Service Guide - Page 48
Model:AL1912 m 48 - Acer AL1912 | AL1912 Service Guide - Page 49
Part list No. 1 Photo 2 3 4 6 7 8 Part Name Hinge Cover Base Assy Part No. FAAR7721000 FAAR9913A00 Rear Cover FAAR9912000 Base Neck Main Shield FAAR9913000 FAAR7713000 ECAR9914A00 MB 49 DA2P577V012 - Acer AL1912 | AL1912 Service Guide - Page 50
9 Power Board to MB cable 599: 453AAP30021 598: 453AAP30031 10 Inverter Board 599: 453AAP30021 598: 453AAP30031 11 Front Bezel FAAR9911A00 12 Keyboard to MB Cable 599: DCO20162300 598: DCO20162500 13 Speaker-R CG10021V900 14 Speaker-L CG19921V910 15 Frame ECAR9915A00 16 LCD (R) - Acer AL1912 | AL1912 Service Guide - Page 51
17 Panel to MB cable DC020162600 18 Function Board 599: 454AAPE0001 598: 454AAP30011 51 - Acer AL1912 | AL1912 Service Guide - Page 52
Schematic Diagram Chapter 7 52 - Acer AL1912 | AL1912 Service Guide - Page 53
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