AL1751 Service Guide
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... trademarks of LiteOn Technology Corp. Intel is a registered trademark of Intel Corporation. ACER AL1751 Service Manual Printed in this guide is ". Acer is a registered trademark of Acer Corporation. Acer Incorporated makes no representations or warranties, either expressed or implied, with respect to ...change without prior written permission of Intel Corporation. Disclaimer The information in the software. Any Acer Incorporated software described in Taiwan. All rights reserved. Pentium and Pentium II/III are trademarks and/or registered trademarks...
... trademarks of LiteOn Technology Corp. Intel is a registered trademark of Intel Corporation. ACER AL1751 Service Manual Printed in this guide is ". Acer is a registered trademark of Acer Corporation. Acer Incorporated makes no representations or warranties, either expressed or implied, with respect to ...change without prior written permission of Intel Corporation. Disclaimer The information in the software. Any Acer Incorporated software described in Taiwan. All rights reserved. Pentium and Pentium II/III are trademarks and/or registered trademarks...
AL1751 Service Guide
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... information relating to order FRU parts for whatever reason, a part number change is a registered trademark of their respective owners. For ACER-AUTHORIZED SERVICE PROVIDERS, your regional office MAY have a DIFFERENT part number code to extend the functionality of this manual: Screen messages... better fit local market requirements and enhance product competitiveness, your Acer office may have decided to those given in this generic service guide. add-on your regional Acer office to the BASIC CONFIGURATION decided for Acer's "global" product offering. If, for repair and service ...
... information relating to order FRU parts for whatever reason, a part number change is a registered trademark of their respective owners. For ACER-AUTHORIZED SERVICE PROVIDERS, your regional office MAY have a DIFFERENT part number code to extend the functionality of this manual: Screen messages... better fit local market requirements and enhance product competitiveness, your Acer office may have decided to those given in this generic service guide. add-on your regional Acer office to the BASIC CONFIGURATION decided for Acer's "global" product offering. If, for repair and service ...
AL1751 Service Guide
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These limits are present inside the monitor. Connect the equipment into an outlet on , the user is the responsibility of the user to correct such interference. The manufacturer is connected. 4. As an ENERGY STAR® Partner our company has determined that interference will not occur in order to comply with the limits for a Class B digital device, pursuant to Part 15 of the following measures: 1. This equipment generates, uses and can be used in a residential installation. If this product meets the ENERGY STAR® guidelines for any , must be determined by ...
These limits are present inside the monitor. Connect the equipment into an outlet on , the user is the responsibility of the user to correct such interference. The manufacturer is connected. 4. As an ENERGY STAR® Partner our company has determined that interference will not occur in order to comply with the limits for a Class B digital device, pursuant to Part 15 of the following measures: 1. This equipment generates, uses and can be used in a residential installation. If this product meets the ENERGY STAR® guidelines for any , must be determined by ...
AL1751 Service Guide
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Do not place the monitor in the back and bottom of the cabinet are provided for long periods of time. Overloading can injure a person and cause serious damage to qualified service personnel To ensure satisfactory operation, use the monitor only with the attached power adapter (output 12V DC) which have appropriate configured receptacles marked between 100 - 240V AC, Min. 3.5A. Never spill liquids on a bed, sofa, rug, or similar surface. Please refer all servicing to the appliance. near the equipment and shall be easily accessible. Do not place the monitor on the monitor...
Do not place the monitor in the back and bottom of the cabinet are provided for long periods of time. Overloading can injure a person and cause serious damage to qualified service personnel To ensure satisfactory operation, use the monitor only with the attached power adapter (output 12V DC) which have appropriate configured receptacles marked between 100 - 240V AC, Min. 3.5A. Never spill liquids on a bed, sofa, rug, or similar surface. Please refer all servicing to the appliance. near the equipment and shall be easily accessible. Do not place the monitor on the monitor...
AL1751 Service Guide
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You may include blemishes of 0.01% or less such as a missing pixel or a pixel lit all of the previous screen may flicker during initial use . Due to the nature of the LCD screen, an afterimage of the time. It may find slightly uneven brightness on the screen depending on again to the nature of 99.99% or more. Turn off the Power Switch for hours. Notes Due to make sure the flicker disappears. In this case, the screen is displayed for hours. 7 The LCD screen has effective pixels of the fluorescent light, the screen may remain after switching the image, when the same ...
You may include blemishes of 0.01% or less such as a missing pixel or a pixel lit all of the previous screen may flicker during initial use . Due to the nature of the LCD screen, an afterimage of the time. It may find slightly uneven brightness on the screen depending on again to the nature of 99.99% or more. Turn off the Power Switch for hours. Notes Due to make sure the flicker disappears. In this case, the screen is displayed for hours. 7 The LCD screen has effective pixels of the fluorescent light, the screen may remain after switching the image, when the same ...
AL1751 Service Guide
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Table Of Contents Chapter 1 Monitor Features Introduction Electrical Requirements LCD Monitor General Specification LCD Panel Specification Block Diagram Main Board Diagram Software Flow chart Main Board Layout Front Bezel Rear Bezel Adjusting the picture LOGO Chapter 2 Machine Disassembly Chapter 3 Troubleshooting Chapter 4 Connector Information Chapter 5 FRU (Field Replacement Unit) List Exploded Diagram Chapter 6 Schematic Diagram Top Power Input Scaler Panel interface Mpu Adapter Board Inverter Board 9 10 12 11 12 14 15 16 17 19 21 22 26 27 32 38 39 40 44 44 45 46...
Table Of Contents Chapter 1 Monitor Features Introduction Electrical Requirements LCD Monitor General Specification LCD Panel Specification Block Diagram Main Board Diagram Software Flow chart Main Board Layout Front Bezel Rear Bezel Adjusting the picture LOGO Chapter 2 Machine Disassembly Chapter 3 Troubleshooting Chapter 4 Connector Information Chapter 5 FRU (Field Replacement Unit) List Exploded Diagram Chapter 6 Schematic Diagram Top Power Input Scaler Panel interface Mpu Adapter Board Inverter Board 9 10 12 11 12 14 15 16 17 19 21 22 26 27 32 38 39 40 44 44 45 46...
AL1751 Service Guide
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... audio amplifier with no radiation. It is designed with the latest LCD technology to provide a performance oriented product with OSD control to drive a pair of AL1751 Panel Signal Interface Sync Type Color Temp User Adjust DDC Speaker Headphone Jack Microphone Jack USB Hub Tilt / Swivel 17" SEC LTM170EU-L21 D-SUB DVI...
... audio amplifier with no radiation. It is designed with the latest LCD technology to provide a performance oriented product with OSD control to drive a pair of AL1751 Panel Signal Interface Sync Type Color Temp User Adjust DDC Speaker Headphone Jack Microphone Jack USB Hub Tilt / Swivel 17" SEC LTM170EU-L21 D-SUB DVI...
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Electrical Requirements Standard Test Conditions All tests shall be distinguished. In the center (unless otherwise specified) 230V 5Ċ 20+5¥ 1280x1024, 60 Hz, all white Measurement systems The units of 32 linear distributed gray-scales (0j 700mv) can be performed under test. Ambient light : Dark room Viewing distance : 40 cm for LCD performance, 20 cm for LCD failures Warm up time All specifications : ģ30 minutes Fully functional : 5 seconds Measuring equipment : Chroma 7120 signal generator or equivalent, directly Connected to factory preset value, ...
Electrical Requirements Standard Test Conditions All tests shall be distinguished. In the center (unless otherwise specified) 230V 5Ċ 20+5¥ 1280x1024, 60 Hz, all white Measurement systems The units of 32 linear distributed gray-scales (0j 700mv) can be performed under test. Ambient light : Dark room Viewing distance : 40 cm for LCD performance, 20 cm for LCD failures Warm up time All specifications : ģ30 minutes Fully functional : 5 seconds Measuring equipment : Chroma 7120 signal generator or equivalent, directly Connected to factory preset value, ...
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Ver. Brightness Uniformity (9 Points) Symbol Condition C/R Tr TF YL θ=0, RX φ=0 Normal RY Viewing GX Angle GY BX BY WX WY θL θR CR10 φH φL BUNI MIN. 500 2.0 6.0 250 0.620 0.300 0.270 0.570 0.120 0.050 0.283 0.299 65 65 65 50 - MAX. - - - 0.680 0.360 0.330 0.630 0.180 0.110 0.343 0.359 - 25 UNIT msec cd/m2 Degrees % 12 LCD Panel Specification LCD Panel Model (SAMSUNG LTM170EU-L21) Display Type active matrix color TFT LCD Resolution 1280x1024 pixels Display Dot 1280x (RGB) x 1024 Display Area 337.92mm(H) x 270.336mm...
Ver. Brightness Uniformity (9 Points) Symbol Condition C/R Tr TF YL θ=0, RX φ=0 Normal RY Viewing GX Angle GY BX BY WX WY θL θR CR10 φH φL BUNI MIN. 500 2.0 6.0 250 0.620 0.300 0.270 0.570 0.120 0.050 0.283 0.299 65 65 65 50 - MAX. - - - 0.680 0.360 0.330 0.630 0.180 0.110 0.343 0.359 - 25 UNIT msec cd/m2 Degrees % 12 LCD Panel Specification LCD Panel Model (SAMSUNG LTM170EU-L21) Display Type active matrix color TFT LCD Resolution 1280x1024 pixels Display Dot 1280x (RGB) x 1024 Display Area 337.92mm(H) x 270.336mm...
AL1751 Service Guide
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CCFL Drive. The Inverter board will provide the 12V DC-power to inverter/power board and main board. Flat Panel and CCFL backlight Inverter board Adapter AC-IN 100V-240V Main Board (Include: Audio board, keyboard) RS232 Connector For white balance adjustment in factory mode HOST Computer Video signal, DDC 14 The adapter will drive the backlight of panel. Monitor Block Diagram The LCD MONITOR will contain a main board (include: keypad board and audio board), an inverter board, adapter which house the flat panel control logic, brightness control logic and DDC.
CCFL Drive. The Inverter board will provide the 12V DC-power to inverter/power board and main board. Flat Panel and CCFL backlight Inverter board Adapter AC-IN 100V-240V Main Board (Include: Audio board, keyboard) RS232 Connector For white balance adjustment in factory mode HOST Computer Video signal, DDC 14 The adapter will drive the backlight of panel. Monitor Block Diagram The LCD MONITOR will contain a main board (include: keypad board and audio board), an inverter board, adapter which house the flat panel control logic, brightness control logic and DDC.
AL1751 Service Guide
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And go into eeprom. Software Flow Chart 1 2 Y 3 N 4 5 N Y 6 7 N 8 Y 9 1) MCU initialize. 2) Is the eeprom blank? 3) Program the eeprom by default values. 4) Get the PWM value of back light. 12) Check the analog and digital port, are there any signals coming? 13) Does the scalar send out a interrupt request? 14) Wake up the scalar. 15) Are there any signals coming mode. 18) Process the OSD display. 19) Read the keyboard. Check the pin PANEL1 and PANEL2 to tell which panel to get with it to show the coming from eeprom. Turn on the LED and set it . 5) Is the power key ...
And go into eeprom. Software Flow Chart 1 2 Y 3 N 4 5 N Y 6 7 N 8 Y 9 1) MCU initialize. 2) Is the eeprom blank? 3) Program the eeprom by default values. 4) Get the PWM value of back light. 12) Check the analog and digital port, are there any signals coming? 13) Does the scalar send out a interrupt request? 14) Wake up the scalar. 15) Are there any signals coming mode. 18) Process the OSD display. 19) Read the keyboard. Check the pin PANEL1 and PANEL2 to tell which panel to get with it to show the coming from eeprom. Turn on the LED and set it . 5) Is the power key ...
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Location U301 U302 U401 U402 U403 U701 U702 CN301 CN302 CN402 CN601 CN602 CN603 CN701 CN702 U601 X401 X402 Part NO 56L1133 34 56L1133 34 56L 562 82 56L1125137SZB 56L1133 24 56L 563 11 56L 563 31 88L 35315F H 88L 35424F H 33L801724A H 33G3802 4H 88L 30214K 88L 30211K 88L 304 1C 33G3802 6H 56L 616 1 93L 22 53 93L 22 55 H Description M24C02-WMN6T SMT M24C02-WMN6T SMT TSU56AK PQFP-128 W78E65-40P AT24C16AN-10SI-2.7 SI-8050SD AZ1117D-1.8 D-SUB 15PIN DVID CONN. 24P FEMALE PIN HEADER 24P 2.0mm WAFER 4P RIGHT ANGLE PHONE JACK PHONE JACK power jack WAFER 6P RIGHT ANGLE PI TDA7496L BY ST CRYSTAL 14....
Location U301 U302 U401 U402 U403 U701 U702 CN301 CN302 CN402 CN601 CN602 CN603 CN701 CN702 U601 X401 X402 Part NO 56L1133 34 56L1133 34 56L 562 82 56L1125137SZB 56L1133 24 56L 563 11 56L 563 31 88L 35315F H 88L 35424F H 33L801724A H 33G3802 4H 88L 30214K 88L 30211K 88L 304 1C 33G3802 6H 56L 616 1 93L 22 53 93L 22 55 H Description M24C02-WMN6T SMT M24C02-WMN6T SMT TSU56AK PQFP-128 W78E65-40P AT24C16AN-10SI-2.7 SI-8050SD AZ1117D-1.8 D-SUB 15PIN DVID CONN. 24P FEMALE PIN HEADER 24P 2.0mm WAFER 4P RIGHT ANGLE PHONE JACK PHONE JACK power jack WAFER 6P RIGHT ANGLE PI TDA7496L BY ST CRYSTAL 14....
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This monitor will appear to be non-functional if there is no video input signal this monitor to conserve electrical energy by the Video Electronics Standards Association (VESA) and/or the United States Environmental Protection Agency (EPA) and The Swedish Confederation Employees (NUTEK). This monitor meets the Green monitor standards as set consisting of DDC used, communicate additional information about its display capabilities. This feature is designed to operate properly, there must be a video input signal. The display is a bidirectional data channel based on the I²C ...
This monitor will appear to be non-functional if there is no video input signal this monitor to conserve electrical energy by the Video Electronics Standards Association (VESA) and/or the United States Environmental Protection Agency (EPA) and The Swedish Confederation Employees (NUTEK). This monitor meets the Green monitor standards as set consisting of DDC used, communicate additional information about its display capabilities. This feature is designed to operate properly, there must be a video input signal. The display is a bidirectional data channel based on the I²C ...
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Remove the base stand (Fig 2) Fig 1 Fig2 3. Disassembly Procedure 1. Chapter 2 Machine Disassembly This chapter contains step-by-step procedures on how to release back cover. (Fig 1). 2. Remove two screws to assemble the monitor for maintenance. Remove the hinge cap. (Fig 4) 27 Remove four screws to release front bezel. (Fig 3) 4.
Remove the base stand (Fig 2) Fig 1 Fig2 3. Disassembly Procedure 1. Chapter 2 Machine Disassembly This chapter contains step-by-step procedures on how to release back cover. (Fig 1). 2. Remove two screws to assemble the monitor for maintenance. Remove the hinge cap. (Fig 4) 27 Remove four screws to release front bezel. (Fig 3) 4.
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Remove eleven screws to release top cover and bottom cover. (Fig 5) 6. Remove the main board. (Fig 6) 28 Fig 3 Fig 4 5.
Remove eleven screws to release top cover and bottom cover. (Fig 5) 6. Remove the main board. (Fig 6) 28 Fig 3 Fig 4 5.
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Fig 5 Fig 6 7.Remove six clamps to release shield and the main board. (Fig 7) 8.Remove the main frame. (Fig 8) 9.Remove the inverter board. (Fig 9) 29
Fig 5 Fig 6 7.Remove six clamps to release shield and the main board. (Fig 7) 8.Remove the main frame. (Fig 8) 9.Remove the inverter board. (Fig 9) 29
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Chapter 3 Troubleshooting This chapter provides troubleshooting information for the AL1751: 1. NG OK Replace U702 NG X402 oscillate waveform is normal NG Measure 12V input voltage OK NG Check the adapter section Measure U702 PIN2=5V? No power No power Press power key and look if the picture is normal NG Replace X402 OK Replace U402 NG Replace U401 32
Chapter 3 Troubleshooting This chapter provides troubleshooting information for the AL1751: 1. NG OK Replace U702 NG X402 oscillate waveform is normal NG Measure 12V input voltage OK NG Check the adapter section Measure U702 PIN2=5V? No power No power Press power key and look if the picture is normal NG Replace X402 OK Replace U402 NG Replace U401 32
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No picture (LED is orange) No picture NG Key is connected normally Replace U401 NG OK Replace U401 Input the sync signal of computer, or change the cable 33 2. OK X401 oscillate waveform is normal X402 oscillate waveform is normal NG Replace X402 OK Replace U402 OK NG Replace X401 NG Check if the sync signal from computer is output and video cable is under control?
No picture (LED is orange) No picture NG Key is connected normally Replace U401 NG OK Replace U401 Input the sync signal of computer, or change the cable 33 2. OK X401 oscillate waveform is normal X402 oscillate waveform is normal NG Replace X402 OK Replace U402 OK NG Replace X401 NG Check if the sync signal from computer is output and video cable is under control?