Acer AL1914 AL1914 Service Guide
Acer AL1914 Manual
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- Acer AL1914 | AL1914 Service Guide - Page 1
Acer AL1914 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 AL1914 | AL1914 Service Guide - Page 2
, manual or otherwise, without the prior written permission of Acer Incorporated. Disclaimer The information in this guide is subject to change without notice. Acer Incorporated makes no representations or warranties, either expresses or implied, with respect to the contents hereof and specifically - Acer AL1914 | AL1914 Service Guide - Page 3
to avoid possible hardware or software problems. Important Reminds you to do specific actions relevant to the accomplishment of procedures. Preface Before using this information and the product it supports, please read the following general information. 1. this Service Guide provides you with all - Acer AL1914 | AL1914 Service Guide - Page 4
digital device, pursuant to Part 15 of the FCC with the instructions, may cause off and on, the user is encouraged to try an outlet on a circuit different from that to which monitor to rain or moisture. Dangerously high voltages are present inside the monitor. Do not open the cabinet. Refer servicing - Acer AL1914 | AL1914 Service Guide - Page 5
power strips and extension cords. Overloading can result in fire or electric shock. z Never push any object into the slot on the monitor cabinet. It could short circuit parts causing a fire or electric shock. Never spill liquids on the monitor. z Do not attempt to service the monitor yourself - Acer AL1914 | AL1914 Service Guide - Page 6
are normal with LCD monitor and do not indicate a problem. NOTES z 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. z You may find slightly uneven brightness in the screen - Acer AL1914 | AL1914 Service Guide - Page 7
...23 BLOCK DIAGRAM ...24 MONITOR BOARD LAYOUT ...27 SOFTWARE FLOW CHART ...29 GENERAL INSTRUCTIONS ...30 SYSTEM INSTALLATION ...31 POWER/INVERTOR BOARD ...36 ELECTRICAL SPECIFICATION...37 INVERTER ELECTRICAL SPECIFICATION ...39 SAFETY ...41 Chapter 2 Operating Instruction 43 CONTROLS ...43 MAIN - Acer AL1914 | AL1914 Service Guide - Page 8
Comparison Chart of AL1914 AL1914 Normal 19" panel LG LM190E03-B4 Panel LG LM190E03-B4N9 Samsung LTM190EX-L01 AU M190EN04 V5 Signal Interface Sync Type for analog input Sync Type for DVI input DSUB or DSUB + DVI Separate / compatible T.M.D.S. Color Temp user adjust Support DDC DDC2B - Acer AL1914 | AL1914 Service Guide - Page 9
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 CA100 photometer, or equivalent Control settings User brightness control - Acer AL1914 | AL1914 Service Guide - Page 10
lux = foot-candle x 10.76 LCD monitor General specification Panel Type: 19 " active matrix color TFT LCD 1). LG LM190E03-B4 2). LG LM190E03- 1024 × 768 (60/70/75 Hz) SXGA 1280 × 1024 (60/70/75 Hz) standard resolution 0.294mm(H) × 0.294mm(V) 1280 x (RGB) × 1024 25.2 - 135.0MHz LG: 500:1 - Acer AL1914 | AL1914 Service Guide - Page 11
Luminance Uniformity: LG AU LG Samsung AU L / R ≧ 70 / ≧ 70 U / D ≧ 75 / ≧ 60 < 1.3 (max) < 25 % (max) >70% (min) Samsung - 11 - - Acer AL1914 | AL1914 Service Guide - Page 12
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(standard VGA video) 24 pin DVI-D. 3.5 mm stereo audio jack (Audio) Audio power: 0.5Wrms + 0.5Wrms (300Hz - 10kHz (S.P.L. - 10 dB)) Front control: power on/off with LED select adjustment (+,-) Interface frequency Horizontal Frequency 24KHz --80KHz Vertical Frequency 49Hz ------75Hz - 13 - - Acer AL1914 | AL1914 Service Guide - Page 14
Plug & play: Power Input voltage: Total output power: Support VESA DDC2B functions Single phase, 50/60HZ, 100 VAC to 240VAC ±10% 60 Watt max. LCD Panel Specification LCD Panel Model (LG) • Display Type • Resolution • Display Dot • Display Area • Pixel Pitch • Display Color • Lamp Voltage • Lamp - Acer AL1914 | AL1914 Service Guide - Page 15
Voltage • Lamp Current • Weight Optical Specifications active matrix color TFT LCD 1280x1024 pixels 1280x (RGB) x 1024 376.32mm(H) x 301.056mm(V) 0.294mm(H) x 0.294mm(V) 16.7M 650 Vrms (typ) 7.0 mArms (typ) 2250g (Max) LCD Panel Model (AU) • Display Type • Resolution • Display Dot • Display Area - Acer AL1914 | AL1914 Service Guide - Page 16
• Pixel Pitch • Display Color • Lamp Voltage • Lamp Current Weight Optical Specifications 0.294mm(H) x 0.294mm(V) 16.2M(RGB 6bit data + FRC data) 700 Vrms (typ) 7.0 mArms (typ) 2700g (Max) - 16 - - Acer AL1914 | AL1914 Service Guide - Page 17
Panel Relative Humidity LG Samsung - 17 - - Acer AL1914 | AL1914 Service Guide - Page 18
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 AL1914 | AL1914 Service Guide - Page 19
Supported Timing TIMING FH(KHZ) FV(HZ) 640x350 VGA-350 640x400 NEC PC9801 640x400 VGA-GRAPH 640x400 NEC PC9821 640X480 VESA-PAL 640x480 VGA-480 640x480 112 71.664 36 144 75 29 176 78.75 28 176 80 29 192 80 32 200 94.499 44 256 108.00 32 - 19 - - Acer AL1914 | AL1914 Service Guide - Page 20
1280x960 60.00 + 1800 1280 112 96 312 108.00 (60Hz) 60.00 + 1000 960 3 1 36 1280x960 70.00 + 1800 1280 112 96 312 126.00 (70Hz) 70.00 + 1000 960 3 1 36 1280x960 75.00 + 1800 1280 112 96 312 135.00 (75Hz) 75.00 + 1000 960 3 1 36 1280x1024 64 + - Acer AL1914 | AL1914 Service Guide - Page 21
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 Connector Analog Video input Connector: 15pins mini D-Sub Table 2.4.5. Pin - Acer AL1914 | AL1914 Service Guide - Page 22
of plastic parts: Blue (PC99) 1 6 11 D-sub connector Digital Video Input Connector : DVI - D (T.B.D) Table 2.4.6 Pin assignment for DVI - D Connector: Pin - Assignment of DVI -D connector : 1 TX2- 9 TX1- 17 TX0- 2 TX2+ 10 TX1+ 18 TX0+ 3 Shield (TX2 / TX4) 11 Shield (TX1 / TX3) 19 Shield - Acer AL1914 | AL1914 Service Guide - Page 23
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 AL1914 | AL1914 Service Guide - Page 24
BLOCK DIAGRAM System Block Diagram 1. - 24 - - Acer AL1914 | AL1914 Service Guide - Page 25
2. - 25 - - Acer AL1914 | AL1914 Service Guide - Page 26
3. - 26 - - Acer AL1914 | AL1914 Service Guide - Page 27
Monitor board layout 1. LABEL U1 U2 U3 U4 U5 U6 U7 U8 U9 U10 Component 24LC21A 24LC21A TSU56AJ or TSU16AJ MX10E8050IAQC MAX810 24LC16B APM4461 APL1085-33CE APL1117-1. - Acer AL1914 | AL1914 Service Guide - Page 28
2. LABEL U3 U4 U5 U6 U10 U13 U14 U501 Component SN74LVC14 NT68F633 24LC16B NT68521 APL1085-33CE APL1117-2.5 SI9435 LM4838 LABEL CN1 CN3 CN9 CN301 CN302 J1 Component D-SVB 15 PIN E&T 96113-0803 E&T 4500-10 E&T 96113-1103 E&T 4500-03 P-TWO AFN300-N2G1Z - 28 - - Acer AL1914 | AL1914 Service Guide - Page 29
Software flow chart - 29 - - Acer AL1914 | AL1914 Service Guide - Page 30
General 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. z The power cord should be connected. z Connect the video cable from - Acer AL1914 | AL1914 Service Guide - Page 31
to the VGA port on your PC. z Make sure connections are secure. Connecting the AC Power z Connect the power cord to the LCD Monitor. z Connect the power cord to an AC power source. Connecting the Audio Cable (For AL1914) z Connect the audio cable to the " LINE OUT " jack on your PC's audio card or - Acer AL1914 | AL1914 Service Guide - Page 32
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 - 32 - - Acer AL1914 | AL1914 Service Guide - Page 33
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 - 33 - - Acer AL1914 | AL1914 Service Guide - Page 34
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. - 34 - - Acer AL1914 | AL1914 Service Guide - Page 35
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 - 35 - - Acer AL1914 | AL1914 Service Guide - Page 36
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 AL1914 | AL1914 Service Guide - Page 37
2.Inverter-side connecter : ACES 87210-0236 2P P3.5 PIN NO. 1 2 Function Cth Ctl Comment VBLH(High voltage) VBLL(Low voltage) Electrical Specification: AC-DC Electrical specification Input Specification No Item 1 Input Voltage Condition ----- 2 Input Frequency ----- 3 Input Current 4 - Acer AL1914 | AL1914 Service Guide - Page 38
AC-DC Output Specification Tolerance Output Current 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 Protection function 1) SCP: Short circuit protection must be acted on both outputs 2) OPP: Should - Acer AL1914 | AL1914 Service Guide - Page 39
Inverter Electrical Specification: For LG 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 675 Brightness lamp current in 6.5mA 200 Typ. 15 1.5 - Acer AL1914 | AL1914 Service Guide - Page 40
15V --- 40 --- ----50000 --- 60 KHz --- 1650 Vrms 1 --- S ±0.3 --- mA 80 --- % --- --- Hr For AU Input Voltage Input Current Backlight ON/OFF Control Brightness Adjust Output Voltage Brightness Condition ----ON OFF Min. Luminance / Max. Luminance Vin=15V, Iout=7.0mA lamp current - Acer AL1914 | AL1914 Service Guide - Page 41
SAFETY Leakage Current: 0.25mA @ 100Vac Insulation Resistance: more than 3M ohms while withstanding a voltage of 500Vac Hi-Pot: 3Kvac with using 3mA cut off current - 41 - - Acer AL1914 | AL1914 Service Guide - Page 42
DDC 5 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 - Acer AL1914 | AL1914 Service Guide - Page 43
Chapter 2 Operating Instructions CONTROLS Control panel (monitor front panel) 1. Power ON/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 - Acer AL1914 | AL1914 Service Guide - Page 44
Icon Contrast Contrast from Digital-register. Adjustment Range 0-100 Brightness Backlight Adjustment 0-100 Focus Clock H. Position V. Position Warm N/A Cool N/A User / Red Adjust Picture Phase to reduce 0-100 Horizontal-Line noise Adjust picture Clock to reduce 0-100 Vertical - Acer AL1914 | AL1914 Service Guide - Page 45
-120 Auto Config N/A Auto Adjust the H/V Position, Focus N/A and Clock of picture. N/A Source Change Analog and Digital source change.(option) N/A The Language will be set to English. 50 50 10 N/A N/A Information N/A Show the resolution, H/V frequency N/A N/A and input port of current iput - Acer AL1914 | AL1914 Service Guide - Page 46
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 this - Acer AL1914 | AL1914 Service Guide - Page 47
: 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 contrast - Acer AL1914 | AL1914 Service Guide - Page 48
VIDEO INPUT SIGNAL. IN ORDER FOR THIS MONITOR TO OPERATE PROPERLY, THERE MUST BE A VIDEO INPUT SIGNAL. This monitor meets the Green monitor standards mode. This reduces the monitor's internal power supply consumption. After the video input signal is restored, full power is restored and the display - Acer AL1914 | AL1914 Service Guide - Page 49
0X A.2.6.1 requirement User should follow "Microsoft Windows Color Quality Specification for Liquid Crystal Display OEM's". (http://www.microsoft.com/hwdev/tech/color/ColorTest.asp) Audio Technical specification General Description: Output power Total harmonic distortion Input signal sensitivity - Acer AL1914 | AL1914 Service Guide - Page 50
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 AL1914 | AL1914 Service Guide - Page 51
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 EMI cover from chassis. 3. Remove the two - Acer AL1914 | AL1914 Service Guide - Page 52
the one screw to release line from Chassis. 6. Remove the three screws from Chassis and 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 - Acer AL1914 | AL1914 Service Guide - Page 53
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. 53 - Acer AL1914 | AL1914 Service Guide - Page 54
Troubleshooting Main Procedure Chapter 4 54 - Acer AL1914 | AL1914 Service Guide - Page 55
Power Circuit and Backlights Troubleshooting 55 - Acer AL1914 | AL1914 Service Guide - Page 56
Performance Troubleshooting 56 - Acer AL1914 | AL1914 Service Guide - Page 57
Function Troubleshooting 57 - Acer AL1914 | AL1914 Service Guide - Page 58
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 AL1914 | AL1914 Service Guide - Page 59
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 and service of customer - Acer AL1914 | AL1914 Service Guide - Page 60
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Part list No. 1 2 Photo Part Name Hinge Cover Part No. FAAR7721000 Base Assy FAAR9913A00 3 Rear Cover FAAR9912000 4 Base FAAR9913000 6 Neck FAAR7713000 7 Main Shield ECAR9914A00 DA2R877V01A 8 MB Or DA2R577V012 62 - Acer AL1914 | AL1914 Service Guide - Page 63
9 Power Board to MB cable LG/AU: 453AAP300B1 Samsung: 453AAP300A1 LG/AU: 10 Inverter Board 453AAP300B1 Samsung: 453AAP300A1 11 Front Bezel FAAR9911A00 12 Keyboard to MB Cable DCO20162300 13 Speaker-R CG10021V900 14 Speaker-L CG19921V910 15 Frame ECAR9915A00 AC6VG190000 16 LCD - Acer AL1914 | AL1914 Service Guide - Page 64
17 Panel to MB cable NBX30001040 NBX30001330 18 Function Board 454AAPE0001 64 - Acer AL1914 | AL1914 Service Guide - Page 65
Schematic Diagram Chapter 7 65 - Acer AL1914 | AL1914 Service Guide - Page 66
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