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Acer AL1922r Service Guide
1
Service Guide Version and Revision
No. 1 Version 1.0 Release Date Jun.- 15- 2005 Revision Initial release
2
Copyright
Copyright © 2003 LiteOn Technology Corp. All rights reserved. This manual may not, in whole or in part, be copied, photocopied, reproduced, translated, or converted to any electronic machine readable form without prior written permission of LiteOn Technology Corp. ACER AL1922r Service Manual. Printed in Fujian.
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. 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.
Acer is a registered trademark of Acer Corporation. Intel is a registered trademark of Intel Corporation. Pentium and Pentium II/III are trademarks of Intel Corporation. Other brand and product names are trademarks and/or registered trademarks of their respective holders.
Trademarks
LiteOn is a registered trademark of LiteOn Technology Corp. All other trademarks are property of their respective owners.
Conventions
The following conventions are used in this manual: Screen messages NOTE WARNING CAUTION IMPORTANT Denotes actual messages that appear on screen. Gives bits and pieces of additional information related to the current topic. Alerts you to any damage that might result from doing or not doing specific actions. Gives precautionary measures to avoid possible hardware or software problems. Remind you to do specific actions relevant to the accomplishment of procedures.
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Preface
Before using this information and the product it supports, please read the following general information. 1. This Service Guide provides you with all technical information relating to the BASIC CONFIGURATION decided for Acer's "global" product offering. To better fit local market requirements and enhance product competitiveness, your regional office MAY have decided to extend the functionality of a machine (e.g.add-on card, modem, or extra memory capability). These LOCALIZED FEATURES will NOT be covered in this generic service guide. In such cases, please contact your regional offices or the responsible personnel/channel to provide you with further technical details. 2. Please note WHEN ORDERING FRU PARTS, that you should check the most up-to-date information available on your regional web or channel. If, for whatever reason, a part number change is made, 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 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. 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. 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 equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: 1. Reorient or relocate the receiving antenna. 2. Increase the separation between the equipment and receiver. 3. Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. 4. Consult the dealer or an experienced radio/TV technician for help.
Notice:
1. The changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. 2. Shielded interface cables and AC power cord, if any, must be used in order to comply with the emission limits. 3. The manufacturer is not responsible for any radio or TV interference caused by unauthorized modification to this equipment. It is the responsibility of the user to correct such interference. As ENERGY STAR® Partner our company has determined that this product meets the ENERGY STAR® guidelines for energy efficiency.
Warning:
To prevent fire or shock hazard, do not expose the monitor to rain or moisture. Dangerously high voltages are present inside the monitor. Do not open the cabinet. Refer servicing to qualified personnel only.
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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. Use only a trolley or stand recommended by the manufacturer or sold with the monitor. If you mount the monitor on a wall or shelf, use a mounting kit approved by the manufacturer and follow the kit instructions. Slots and openings in the back and bottom of the cabinet are provided for ventilation. To ensure reliable operation of the monitor and to protect it from overheating, be sure these openings are not blocked or covered. Do not place the monitor on a bed, sofa, rug, or similar surface. Do not place the monitor near or over a radiator or heat register. Do not place the monitor in a bookcase or cabinet unless proper ventilation is provided. The monitor should be operated only from the type of power source indicated on the label. 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 not accommodate the three-wire plug, have an electrician install the correct outlet, or use an adapter to ground the appliance safely. Do not defeat the safety purpose of the grounded plug. Unplug the unit during a lightning storm or when it will not be used for long periods of time. This will protect the monitor from damage due to power surges. Do not overload power strips and extension cords. Overloading can result in fire or electric shock. 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. Do not attempt to service the monitor yourself; opening or removing covers can expose you to dangerous voltages and other hazards. Please refer all servicing to qualified service personnel To ensure satisfactory operation, use the monitor only with UL listed computers which have appropriate configured receptacles marked between 100 - 240V AC, Min. 3.5A. The wall socket shall be installed near the equipment and shall be easily accessible. For use only with the attached power adapter (output 12V DC), which has UL, CSA listed license
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. The LCD screen has effective pixels of 99.99% or more. It may include blemishes of 0.01% or less such as a missing pixel or a pixel lit all of the time. Due to the nature of the LCD screen, an afterimage of the previous screen may remain after switching the image, when the same image is displayed for hours. In this case, the screen is recovered slowly by changing the image or turning off the Power Switch for hours.
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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 Chapter 2 Operating Instructions External Controls Front Panel Controls Adjusting the picture Hot-Key Menu OSD Message LOGO Chapter 3 Chapter 4 Chapter 5 Chapter 6 Machine Disassembly Troubleshooting Connector Information FRU (Field Replacement Unit) List Exploded Diagram Chapter 7 Schematic Diagram For AU Panel Analog and Digital Input TSU56AK Power Supply Panel interface Audio Power Board (adapter +inverter) ............................................. ............................................. ............................................. ............................................. ............................................. ............................................. ............................................. ............................................. ............................................. ............................................. ............................................. ............................................. ............................................. ............................................. ............................................. ............................................. ............................................. ............................................. ............................................. ............................................. ............................................. ............................................. ............................................. ............................................. ............................................. ............................................. ............................................. ............................................. ............................................. ............................................. ............................................. 7-19 7 8 9 10 12 13 14 15 17 18 19 20-26 20 21 22 25 25 26 27-34 35-41 42 43-46 44 47-54 47 48 49 50 51 52
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Monitor Features
Introduction
Scope
Chapter 1
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 24 pin DVI 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.
Description
The LCD monitor is designed with the latest LCD technology to provide a performance oriented product with no radiation. 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 AL1922r
AU 19" V5 PANEL (For AU panel) LTM190EX-L01 (For SEC panel) D-SUB Signal Interface DVI Sync Type Color Temp User Adjust DDC Speaker Headphone Jack Microphone Jack USB Hub Tilt / Swivel Height Adjust Separate / Compatible Support DDC2B 1W + 1W (Rated power) No No Not support Yes Yes
Panel
7
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 >30 minutes 5 seconds Chroma 7120 signal generator or equivalent, directly Connected to the monitor under test. Minolta CA100 photometer, or equivalent Control settings User brightness control User contrast control Blue/white balance control Power input Ambient temperature Analog input mode Set to Factory preset value (cut off raster) Set to factory preset value, which allows that the brightest two of 32 linear distributed gray-scales (0 700mv) can be distinguished. In the center (unless otherwise specified) 100 V ~ 240 V 20+5 1280 x1024
Dark room 1 cd/m² 40 cm for LCD performance, 20 cm for LCD failures
Measurement systems The units of measure stated in this document are listed below: 1 gamma = 1 nano tesla 1 tesla = 10,000 gauss cm = in x 2.54 lb = kg x 2.2 degrees F = [°C x 1.8] + 32 degrees C = [°F - 32]/1.8 u' = 4x/(-2x + 12y + 3) v' = 9y/(-2x + 12y + 3) x = (27u'/4)/[(9u'/2) - 12v' + 9] y = (3v')/[(9u'/2) - 12v' + 9] nits = cd/(m2) = Ft-L x 3.426 lux = foot-candle x 10.76
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LCD Monitor General Specification
19 " active matrix color TFT LCD Panel type 19"AU V5 PANEL (For AU Panel) LTM190EX-L01 (For SEC panel) Display size 376.32mm (H) × 301.06mm(V) VGA 640X480 (60/75 Hz) SVGA 800X600 (60/75 Hz) Display mode XGA 1024X768 (60/70/75 Hz) SXGA 1280 × 1024 (60/75 Hz) Pixel pitch Display dot Pixel clock Contrast ratio 0.294mm(H) × 0.294mm(V) 1280 x (RGB) × 1024 135MHz 550:1(For AU Panel) 700:1(For SEC panel) 270 cd/m2 (For AU Panel) Brightness Response time (Tr/Tf) Display color Viewing angle Pc interface 300 cd/m2 (For SEC panel) 8ms (Typ, on/off) 16.2M(RGB 8 bit Data) H: 140 / V: 135 (typ) (For AU Panel) H: 150 / V: 135 (typ) (For SEC Panel) RGB Analog Interface Digital interface (Only Dual-Input Model) Signal connector D-Sub 15pin DVI-D 24pin (Only Dual-Input Model) Interface frequency Horizontal Frequency 30KHz ----80KHz Vertical Frequency Plug & play Power Input voltage Total output power VESA DDC2B 47-63HZ, 100 VAC to 240VAC ±10% 60-Watt max. 55Hz ------75Hz
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LCD Panel Specification
LCD Panel Model (AU M190EN04 V5)
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) 50kHz(typ) 7.0 mArms (typ) 2700g (typ)
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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) 7.5 mArms (typ) 2250g (typ)
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Supported Timing
VESA MODES Horizontal Nominal Mode Resolution Frequency +/- 0.5kHz 640x480@60Hz VGA 640x480@72Hz 640x480@75Hz 800x600@56Hz SVGA 800x600@60Hz 800x600@72Hz 800x600@75Hz 1024x768@60Hz XGA 1024x768@70Hz 1024x768@75Hz 1152x864@75Hz SXGA 1280x1024@60Hz 1280x1024@75Hz 31.469 37.861 37.500 35.156 37.879 48.077 46.875 48.363 56.476 60.023 67.5KHz 63.981 79.976 Horizontal DOS DOS XGA VGA SVGA 720x400@70Hz 640x350@70Hz 1024x768@72Hz 640x480@67Hz 832x624@75Hz 1024x768@60Hz 1024x768@75Hz 31.469 31.469 57.515 35.000 49.725 48.780 60.241 N P P N N N N Sync Polarity N N N N/P P P P N N P P P P Vertical Nominal Freq. +/- 1 Hz 59.940 72.809 75.00 56.250 60.317 72.188 75.000 60.004 70.069 75.029 75 60.020 75.025 Vertical 70.087 70.087 72.1 66.667 74.551 60.001 74.927 P N P N N N N 28.322 25.175 75.000 30.240 57.2832 64.000 80.000 Nominal Sync Polarity N N N N/P P P P N N P P P P Pixel Clock (MHz) 25.175 31.500 31.500 36.000 40.000 50.000 49.500 65.000 75.000 78.750 108.000 108.000 135.000
IBM MODES
MAC MODES
XGA
.
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.
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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..
CCFL Drive.
Flat Panel and CCFL backlight
Power Board (Inverter adapter Board)
Main Board
RS232 Connector For white balance adjustment in factory mode
Audio board AC-IN 100V-240V
Keyboard
HOST Computer
Video signal, DDC
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Main Board Diagram
EEPROM 24C16 LCD Interface
MCU Scaler TSU56AK LF (Include: ADC, OSD etc)
Crystal 14.318MHZ
OSD Control Interface (Keypad) DVI Connector D-SUB Connector
EEPROM 24C02
EEPROM 24C02
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Software Flow Chart
1
Y 2 N 3
4
N 5 Y 6
N 7 Y 8
9
10 Y N 12 Y 14
N
11
13 Y
N
N 15 Y 17 16
18
N
19 Y
15
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. 9) Save the power key status into EEPROM. Turn on the LED and set it to green color. Scalar initializes. 10) In standby mode? 11) Update the lifetime of back light. 12) Check the analog port, are there any signals coming? 13) Does the scalar send out an interrupt request? 14) Wake up the scalar. 15) Are there any signals coming from analog port? 16) Display "No connection Check Signal Cable" message. And go into standby mode after the message disappears. 17) Program the scalar to be able to show the coming mode. 18) Process the OSD display. 19) Read the keyboard. Is the power key pressed?
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Main Board Layout
LABEL U201 U202 U401 U601 CN201 CN301 CN302 CN503 X401 X601 56G 563 31 56G 563 7 56G 562 82
PART NO.
DESCRIPTION AI1117D-1.8-EI AIC1084-33PM TSU56AK-LF W78E65-40 WAFER 2*6P 2.0MM R/A D-SUB 15PIN DVI CONN 24P WAFER CRYSTAL 14.318MHZ 20MHZ
56L1125137SZ7 33G8027 12 88G 35315F HS 88G 35424F HS 33G802724B H 93G 22 53 93G 22 55 H
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Front Bezel
Item 1. 2. 3. 4. 5. >/Volume
Description
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Rear Bezel
Item 1. 2. 3. 4.
Description D-SUB CABLE DVI CABLE AUDIO CABLE AC POWER CORD
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Operating Instructions
Chapter 2
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. · 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.
External Controls
Item 1. 2. 3. 4. 5. >/Volume
Description
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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. · /Volume: Activates the volume control when the OSD is OFF or navigate through adjustment icons when OSD is ON or adjust a function when function is activated.
·
·
/Auto Adjust button / Exit: 1. When OSD menu is in active status, this button will act as EXIT-KEY (EXIT OSD menu). 2.When OSD menu is in off status, press this button for 2 seconds to activate the Auto Adjustment function. The Auto Adjustment function is used to set the HPos, VPos, Clock and Focus.
· Power Indicator: Blue --Power On mode. Orange -- Power saving. Light blue -- Off mode. NOTES Notes · Do not install the monitor in a location near heat sources such as radiators or air ducts, or in a place subject to direct sunlight, or excessive dust or mechanical vibration or shock. · Save the original shipping carton and packing materials, as they will come in handy if you ever have to ship your monitor. · For maximum protection, repackage your monitor as it was originally packed at the factory. · To keep the monitor looking new, periodically clean it with a soft cloth. Stubborn stains may be removed with a 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.
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Adjusting the Picture
a. How to Adjust a Setting
1. 2. 3. 4. 5. Press the MENU-button to activate the OSD window. Press to select the desired function. Press the MENU-button to select the function that you want to adjust. Press < or >to change the settings of the current function. To exit and save, select the exit function. If you want to adjust any other function, repeat steps 2-4.
Dual-Input Model, Analog Signal Input
Dual - Input Model, Digital Signal Input
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b. The Description For Control Function
Main Menu Icon Sub Menu Icon Adjusts the contrast
Sub Menu Item Contrast Brightness Focus Clock H. Position V. Position Warm Cool User / Red User/ Green User / Blue English Deutsch Français Español Italiano H. Position V. Position OSD Timeout
Description between the foreground and
background of the screen image. Adjusts the background brightness of the screen image. Adjust picture Focus (available in Analog mode only). Adjust picture Clock (available in Analog mode only) Adjust picture Focus (available in Analog mode only). Adjust picture Clock (available in Analog mode only) N/A N/A Set the color temperate to warm white. Set the color temperate to cool white.
Adjusts Red/Green/Blue intensity.
N/A N/A N/A N/A N/A N/A N/A N/A
Set OSD display language to English. Set OSD display language to Traditional Chinese. Set OSD display language to German. Set OSD display language to French. Set OSD display language to Spain. Set OSD display language to Italian. Set OSD display language to Simplified Chinese. Set OSD display language to Japanese. Adjust the horizontal position of the OSD. Adjust the vertical position of the OSD. Adjust the OSD timeout.
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Main Menu Icon
Sub Menu Item Analog
Sub Menu Icon N/A
Description Select input signal from analog (D-Sub)
(Dual-Input Model)
Digital
N/A
Select input signal from digital (DVI)
Information
N/A
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.
Reset
N/A
Exit
N/A
Save user adjustment and OSD disappear.
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Hot-Key Menu
a. Outline
b. The Description For Hot-Key Function
Item Volume Operation When the OSD is closed, press Left or Right button will be Volume Hot-Key Function Icon Description Volume of Audio adjustment. The Audio will be Mute when volume=0
OSD Message
a. Outline
b. The Description For OSD Message
Item Auto Config Please Wait Input Not Supported Cable Not Connected monitor do the auto config function. 2. When Digital signal input, without this OSD Message. When the Hsync Frequency, Vsync Frequency or Resolution is out of the monitor support range, will show this message. This message will be flying. 1. Analog-Only Model: When the video cable is not connected, will show this message. This message will be flying. 2. Dual-Input Model: Dual-Input Model without this OSD Message. 1. Analog-Only Model: When the video cable is connected, but there is no active signal input, No Signal will show this message, then enter power saving. 2. Dual-Input Model: When the video cable is not connected, or the video cable is connected but there is no active signal input, will show this message, then enter power saving. Description 1. When Analog signal input, if User Press Hot-Key "Auto", will show this message, and the
25
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. The communication channel is defined in two levels, DDC1 and DDC2B. The DDC1 is a unidirectional data channel from the display to the host that continuously transmits EDID information. The DDC2B is a bi-directional data channel based on the I²C protocol. The host can request EDID information over the DDC2B channel. This monitor will appear to be non-functional if there is no 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 as set by the Video Electronics Standards Association (VESA) and/or the United States Environmental Protection Agency (EPA) and The Swedish Confederation Employees (NUTEK). This feature is designed to conserve electrical energy by reducing power consumption when there is no video-input signal present. When there is no video input signal 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" feature except the display is completely off. Pressing a key on the keyboard, or clicking the mouse restores the display. Using The Right Power Cord The accessory power cord for the Northern American region is the wallet plug with NEMA 5-15 style and is UL listed and CSA labeled. The voltage rating for the power cord shall be 125 volts AC. Supplied with units intended for connection to power outlet of personal computer: Please use a cord set consisting of a minimum No. 18 AWG, type SJT or SVT three conductors flexible cord. One end terminates with a grounding type attachment plug, rated 10A, 250V, CEE-22 male configuration. The other end terminates with a molded-on type connector body, rated 10A, 250V, having standard CEE-22 female configuration. Please note that power supply cord needs to use VDE 0602, 0625, 0821 approval power cord in European counties.
26
Machine Disassembly
Disassembly Procedure
Chapter 3
This chapter contains step-by-step procedures on how to assemble the monitor for maintenance.
Disassemble the base
1. Remove four screws to release stand base. (Fig 1) 2. Remove the hinge. (Fig 2)
Fig 1
Fig 2
27
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. Remove four screws to release speakers (right and left). (Fig 7)
Fig 3
Fig 4
28
Fig 5
Fig 6
Fig 7
29
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
30
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
31
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 32
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
33
Disassemble the panel
1. Remove four screws (right and left) to release metal frame. (Fig 16)
Fig16
34
Troubleshooting
This chapter provides troubleshooting information for the AL1922r:
Chapter 4
1. No power
No power
Press power key and look if the picture is normal NG Please reinsert and make sure the AC of 100-240 is normal NG Reinsert or check the power section
OK
Measure U201 PIN2=2.5V U202 PIN2=3.3V NG Measure CN201 PIN5/6=12V? Measure CN201 PIN9/10=5V?
OK
X401 oscillate waveforms are normal NG OK Check power section
Replace U201, U202
OK
Replace U401 NG
Replace X401
35
2. No picture (LED is orange)
No picture
Measure U201 PIN2=2.5V U202 PIN2=3.3V
OK
NG
Replace U201, U202
X401 oscillate waveforms are normal
OK
NG
Replace X401
Check if the sync signal from computer is output and video cable is connected normally
NG OK
Input the sync signal of computer, or change the cable
Replace U401
36
3. Panel Power Circuit
Measure Q402 base is high level? Measure U201 PIN2=2.5V U202 PIN2=3.3V Check Q203 and Q204 are broken or CN503 solder?
OK
NG
OK
NG
Replace U201, U202
X401 oscillate waveforms are NG Check Correspondent component. OK normal
OK
Replace PANEL
NG
Replace X401
Replace U401
37
4.Keypad Board
OSD is unstable or not working
NG Is Keypad board connecting normally? Connect Keypad Board
OK NG Is Button Switch normally? OK NG Is Keypad board normally? OK Check main board Replace Keypad Board Replace Button Switch
38
5. PWPC
No Power
No power
Check AC line volt 110V or 220V
OK
NG
Check AC line
Check the voltage of C905(+)
OK
NG
Check F901, bridge rectified circuit
Check start voltage for the pin3 of IC901
OK
NG
Check R906, R907,IC901
Check the auxiliary voltage is between 10V-16V
OK
NG
Check IC901,T901 Check ZD901, D903
Check D910, D911, IC902
39
No Backlight
Check C201 (+) =12V Change F902 Check D201/Q209/Q210/ D202/Q211/Q212
OK
NG
Check ON/OFF signal
OK
NG
Check Interface board
Check U201 pin9=12V ? NG
OK
Change Q201 or Q202
Check the pin1 of U201 have saw tooth wave
OK
NG
Change U201
Check D201 (-), D202 (-) has the output of square wave at short time.
OK
NG
CheckQ205/Q207/Q203/D201or /Q206/Q208/Q204/D202
Check the resonant wave of pin2 & pin5 for PT201/ PT202
OK
NG
Check Q209/Q210/C213 or Q211/Q212/C214
Check the output of PT201/PT202 NG
OK
Change PT201/PT202
Check connecter & lamp
40
6.No Audio
Mute and volume setting is ok?
NG Reset mute and OK volume
Check power supply of U201 is 12 V?
NG Check connecting is ok? OK NG Check input signal of U201is ok? Reconnect
NG Check correspondent OK component
Replace U201
NG
Replace speaker
41
Connector Information
The following figure shows the connector locations on the monitor board:
Chapter 5
1 6 11
5 10 15
15 Pin Color Display Signal Cable (D-sub)
PIN NO. 1. 2. 3. 4. 5. 6. 7. 8. Red
DESCRIPTION
PI N NO. 9. 10. 11. 12. 13. 14. 15. +5V
DESCRIPTION
Green Blue Monitor Ground DDC-Return R-Ground G-Ground B-Ground
Logic Ground Monitor Ground DDC-Serial Data H-Sync V-Sync DDC-Serial Clock
24 Pin Color Display Signal Cable (DVI) PIN NO. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. DESCRIPTION TMDS Data2TMDS Data2+ TMDS Data 2/4 Shield TMDS Data4TMDS Data4+ DDC Clock DDC Data Analogue Vertical Sync TMDS Data1TMDS Data1+ TMDS Data 1/3 Shield TMDS Data3PI N NO. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. +5V Power Ground (Return for +5V Hsync, Vsync) Hot Plug Detect TMDS Data0TMDS Data0+ TMDS Data 0/5 Shield TMDS Data5TMDS Data5+ DDC Clock Shield TMDS Clock+ DDC TMDS ClockDESCRIPTION TMDS Data3+
42
FRU (Field Replaceable Unit) List
chapter whenever ordering for parts to repair or for RMA (Return Merchandise Authorization).
Chapter 6
This chapter gives you the FRU (Field Replaceable Unit) listing in global configurations of AL1922r.Refer to this
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/). For whatever reasons a part number change is made, 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 from 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 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.
43
Exploded Diagram (Model: AL1922r)
44
Part List
Item Picture Description Part No.
1.
Hinge cover
34G1343 FV B
2.
Stand base
34G1342 FV B
3.
Front cover
34G1335BGE B
4.
Rear cover
34G1336AFV 2B
5.
Shield
85G 666 1
6.
Metal frame
15G8021 5
7.
Panel
750LLU90N45/750LLS90EX1
8.
Audio board
AUPC980AE
45
9.
Power board
PWPC1942AUA9
10.
Main board
CBPC980KS2AE
11.
Key board
KEPC980KA8
12.
Speakers
78G 332 1 L / 78G 332 1 R
46
Schematic Diagram
For AU panel Analog and Digital Input
11 12 13 14 15 D323 TZMC5V6-GS08 TZMC5V6-GS08 D322 CN301 DB15 1 6 2 7 3 8 4 9 5 10 RXD TXD 6 6 FB301 FB302 FB303 PC5V VGA_CON 0£[ 1/16W 0£[ 1/16W 0£[ 1/16W R326 75£[ 1/16W R327 75£[ 1/16W R325 75£[ 1/16W C301 NC C302 NC C303 NC R305 R306 R307 3 3 D301 BAV99 D302 BAV99 3 D303 BAV99 VCC5V R308 10K£[ 1/16W R309 HSI VSI FB304 R312 150 OHM 100£[ 1/16W R310 R311 100£[ 1/16W 1K£[ 1/16W 1K£[ 1/16W VCC5V 3 2 1 2 1 2 1 VCC5V 100£[ 1/16W C308 0.047uF 100£[ 1/16W C309 0.047uF 100£[ 1/16W C310 0.047uF GNDR GNDG GNDB 4 4 4 R301 R302 R303 R304 100£[ 1/16W C304 0.047uF 100£[ 1/16W C305 0.047uF 100£[ 1/16W C306 0.047uF 470£[ 1/16W C307 0.001uF RIN GIN BIN SOG 4 4 4 4
Chapter 7
ST_DET1 6 HSYNC VSYNC 4 4
PC5V 2 D304 BAV70
D319 TZMC5V6-GS08
D320 TZMC5V6-GS08
R313 2.2K£[ 1/16W
C311 33pF
R314 10K£[ 1/16W
C312 220pF
D317 TZMC5V6-GS08 R317 10K£[ 1/16W
R318 10K£[ 1/16W 8 7 6 5
1
U301 VCC WP SCL SDA A0 A1 A2 GND 1 2 3 4
C313 0.1uF
CLK_DDC DAT_DDC CN302 R G B RGB GND HSYNC VSYNC SYNC GND DDC SCL DDC SDA +5V HPD 1/3shield 2/4shield 0/5shield clk shield DAT0+ DAT0DAT1+ DAT1DAT2+ DAT2DAT3+ DAT3DAT4+ DAT4DAT5+ DAT5clk+ clkJACK 25 26 27 29 28 8 15 6 7 14 16 11 3 19 22 18 17 10 9 2 1 13 12 5 4 21 20 23 24 3 3 3 3 3 3 3 D306 BAV99 D307 BAV99 D308 BAV99 D309 BAV99 D310 BAV99 D311 BAV99 D312 BAV99 3 D313 BAV99 D321 TZMC5V6-GS08 D318 TZMC5V6-GS08 6 6
R315 R316
100£[ 1/16W 100£[ 1/16W
M24C02WMN6 DDC_DAT DDC_CLK VCC5V 3 DVI5V 2 D305 CLK_DDC2 DAT_DDC2 R319 R320 100£[ 1/16W 100£[ 1/16W DVI5V BAV70 R321 10K£[ 1/16W R322 D314 LL5232B 5.6V 5% D315 LL5232B 5.6V 5% D316 LL5232B 5.6V 5% C314 0.1uF B+ BG+ GR+ R4 4 4 4 4 4 100£[ 1/16W 1 R323 10K£[ 1/16W R324 10K£[ 1/16W 8 7 6 5 ST_DET2 6
U302 VCC WP SCL SDA A0 A1 A2 GND 1 2 3 4
C315 0.1uF
M24C02WMN6
CLK+ CLK-
4 4
VCC5V 2 1 2 1 2 1 2 1 2 1 2 1 2 1 2 1
47
TSU56AK
VCC3.3 FB401 2 VCC3.3 600 OHM C405 10uF/16V VAD VPLL VDVI VDPLL VPO VDD C406C407C408C409C410C411C412C413 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 11 21 84 94 104 114 126 18 87 97 117 C415C416C417C418 0.1uF 0.1uF 0.1uF 0.1uF + VPO 2 VCC2.5 VCC2.5 FB402 600 OHM C414 10uF/16V + VDD
55 65
35
45 51
U401
AVDD_PLL
AVDD AVDD
53
VDDP VDDP VDDP VDDP VDDP VDDP VDDP
AVDD_MPLL
AVDD_DVI AVDD_DVI
VDDC VDDC VDDC VDDC
3 3 3 3 3 3 3 3 3
RIN GNDR GIN GNDG SOG BIN GNDB HSYNC VSYNC
63 62 60 59 61 58 57 37 38 29 28
RIN0 RIN0M GIN0 GIN0M SOGIN0 BIN0 BIN0M HSYNC0 VSYNC0 DDC1_CLK/GPO8 DDC1_DAT/GPO7
LVA3P LVA3M LVACKP LVACKM LVA2P LVA2M LVA1P LVA1M LVA0P LVA0M
102 103 106 107 108 109 110 111 112 113
PA0 PA1 PA2 PA3 PA4 PA5 PA6 PA7 PA8 PA9 PA[0..9] PA[0..9] 5 2 VAA1
VAA1 FB403 600 OHM C419 10uF/16V
VAD
+ C420C421 0.1uF 0.1uF
3 3 3 3 3 3 3 3 VDVI
R+ RG+ GB+ BCLK+ CLKR403 390£[ 1/16W
40 41 43 44 46 47 49 50 52
R+ RG+ GB+ BCK+ CKREXT
66 C401 0.1uF 67
NC/LVB3P NC/LVB3M NC/LVBCKP NC/LVBCKM NC/LVB2P NC/LVB2M NC/LVB1P NC/LVB1M NC/LVB0P NC/LVB0M
118 119 120 121 122 123 124 125 128 1
PB0 PB1 PB2 PB3 PB4 PB5 PB6 PB7 PB8 PB9
PB[0..9]
PB[0..9]
5
VAA2 2 VAA2
FB404 600 OHM C422 10uF/16V
VPLL
REFP REFM
TSU56AK
+ C423 0.1uF
6 CSZ 6 SCL 6 SDA 6 HWRESET 6 INT
69 71 70 32 72
CSZ SCL SDA HWRESETZ INT
VAA3 VCC5V 2 R407 R405 R404 R406 VAA3
FB405 600 OHM C424 10uF/16V
VDVI
+ C425C426 0.1uF 0.1uF
2 6
AdjBACKLITE Volume C402 22pF X401 14.318MHz
73 74 33
PWM0 PWM1 XIN ADO/NC AD1/NC AD2/NC AD3/NC BUS TYPE/NC
10K£[ 1/16W 10K£[ 1/16W 10K£[ 1/16W 10K£[ 1/16W VCC3.3 30 77 78 31 6 R401 NC AVSS_PLL AVSS_DVI AVSS_DVI AVSS_DVI 19 GNDC 86 GNDC 96 116 GNDC GNDC GNDP GNDP GNDP GNDP GNDP GNDP GNDP
AD0 AD1 AD2 AD3
6 6 6 6
R402 100£[ 1/16W 2 VAA4 VAA4 FB406 600 OHM C427 10uF/16V + C428 0.1uF VDPLL
34 C403 22pF C404 0.1uF 3 2
XOUT BYPASS AVSS_LPLL
AVSS AVSS AVSS
AVSS_MPLL
R401 Direct Bus 3-WIRE NC 4.7K
R402 4.7K NC
10 20 85 95 105 115 127
68 56 64
36
54
39 42 48
48
Power Supply
VCC5V VCC5V+
D202 VCC12V VCC12V CN201 GND GND VCC12V GND VCC5V GND 1 3 5 7 9 11 2 4 6 8 10 12 ON_OFF DIM VCC12V GND VCC5V GND R201 4.7K£[ 1/16W C210 VCC5V+ VCC5V VCC5V VCPU VCPU 6 C201 0.1uF 3,4,6 2 3 D201 SS14 R212 4.7K£[ 1/16W 1 Q201 PMBS3904 0.1uF onBACKLITE 6 6 R202 10K£[ 1/16W GS1D 3
SOT-252
U201 RT9164 VI GND VO 2 C211 47uF/16V 1 + C212 0.1uF VCC2.5 4 VCC2.5
C B E
CONN
FB201 600 OHM
VCC5V C202 + R203 1K£[ 1/16W 220uF/25V VCC3.3 R204 10K£[ 1/16W Q202 PMBS3904 C206 1uF/25V 3 C203 0.1uF + 220uF/25V C204 C205 0.1uF
Brightness
3
4
AdjBACKLITE
R205 4.7K£[ 1/16W 1
VCC5V+
VCC3.3
4
TO-263
U202 AIC1084-33M VIN ADJ VOUT 2 C215 47uF/16V C216 0.1uF VAA3 VAA3 VAA4 VAA4 4 4 VAA2 VAA2 4 1 C214 0.1uF VAA1 VAA1 + 4
C B E
2
NEW Circuit
VCC5V VCC5V VLCD VLCD 5 VCC5V R208 10K£[ 1/16W R209 R216 R207 6 onPanel_5V/3.3V 4.7K£[ 1/16W C207 0.1uF 2 4.7K£[ 1/16W 1 3 R215 100K£[ 1/16W Q204 PMBS3904 0.068uF + C208 100uF/16V R211 10K£[ 1/16W C217 Q203 AO3401 0£[ 1/16W R210 NC R213 NC VCC3.3 VCC12V R206 10K£[ 1/16W
R214 delete
49
Panel interface
4 PA[0..9] PA[0..9] PA0 PA1 PA2 PA3 PA4 PA5 PA6 PA7 PB[0..9] PA8 PA9 PB0 PB1 PB2 PB3 PB4 PB5 PB6 PB7 PB8 PB9 LVA3P LVA3M LVACKP LVACKM LVA2P LVA2M LVA1P LVA1M LVA0P LVA0M LVB3P LVB3M LVBCKP LVBCKM LVB2P LVB2M LVB1P LVB1M LVB0P LVB0M CN503 LVB0M LVB1M LVB2M LVBCKM LVB3M LVA0M LVA1M LVA2M LVACKM LVA3M RXO0RXO1RXO2RXOCRXO3RXE0RXE1RXE2RXECRXE31 3 5 7 9 11 13 15 17 19 21 23 2 4 6 8 10 12 14 16 18 20 22 24 RXO0+ RXO1+ RXO2+ RXOC+ RXO3+ RXE0+ RXE1+ RXE2+ RXEC+ RXE3+ LVB0P LVB1P LVB2P LVBCKP LVB3P LVA0P LVA1P LVA2P LVACKP LVA3P
4
PB[0..9]
CONN VLCD VLCD 2
R502 0£[ 1/16W
C509 + 47uF/16V
C510 0.1uF
C511 0.1uF
50
Audio
OUT_LOUT_R
+12V 12V CN202 WAFER 2*7P 2.54mm MUTE 13 11 9 7 5 3 1 14 12 10 8 6 4 2
+ C201 470uF/16V
+ C202 470uF/16V C203 0.1uF
VOLUME
STANDBY
GND CN204 1 2 3 33L8022-3A-H FEMALE 220K£[ R201 10K£[ 10K£[
16
15
8
U201 TDA7496L
GND C205 CN203 4 3 2 1 WAFER 4P2.0 R/A R207 1K£[ R208 1K£[ GND C215 100 pF
VS
C204 0.47uF 4 C206 0.47uF 9 6 11 12 INL INR
NC
VS
OUTL OUTR SVR VAROUT_R VAROUT_L
17 470uF/16V 14 10 7 5 C207 470uF/16V + + C214 100 pF GND GND
R203
R212
VOLUME STBY MUTE
5.6K£[
5.6K£[
C211 100 pF
C212 100 pF + C209 + C210 1.0uF 1.0uF C213 0.1uF
GND GND GND GND GND GND GND
GND
R210
R211
C208 470uF/16V
GND
GND
51
1 2 3 13 18 19 20
GND
+
Power board (adapter + inverter)
52
53
54