Acer AL1922 r Service Manual Download Page 38 | Manualshive

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38

4.Keypad Board

OK

OK

OSD is unstable or not working

Is Keypad board connecting normally?

Is Button Switch normally?

Is Keypad board normally?

Check main board

Connect Keypad Board

Replace Button Switch

Replace Keypad Board

OK

NG

NG

NG

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Summary of Contents for AL1922 r

Page 1: ...1 Acer AL1922r Service Guide ...

Page 2: ...2 Service Guide Version and Revision No Version Release Date Revision 1 1 0 Jun 15 2005 Initial release ...

Page 3: ...r 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 resp...

Page 4: ...rference 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 recept...

Page 5: ...uring 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 ...

Page 6: ...ezel 19 Chapter 2 Operating Instructions 20 26 External Controls 20 Front Panel Controls 21 Adjusting the picture 22 Hot Key Menu 25 OSD Message 25 LOGO 26 Chapter 3 Machine Disassembly 27 34 Chapter 4 Troubleshooting 35 41 Chapter 5 Connector Information 42 Chapter 6 FRU Field Replacement Unit List 43 46 Exploded Diagram 44 Chapter 7 Schematic Diagram 47 54 For AU Panel Analog and Digital Input 4...

Page 7: ...tor 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 Panel AU 19 V5 PANEL For AU panel...

Page 8: ...gs User brightness control Set to Factory preset value cut off raster User contrast control Set to factory preset value which allows that the brightest two of 32 linear distributed gray scales 0 700mv can be distinguished Blue white balance control In the center unless otherwise specified Power input 100 V 240 V Ambient temperature 20 5 Analog input mode 1280 x1024 Measurement systems The units of...

Page 9: ...atio 550 1 For AU Panel 700 1 For SEC panel Brightness 270 cd m2 For AU Panel 300 cd m2 For SEC panel Response time Tr Tf 8ms Typ on off Display color 16 2M RGB 8 bit Data Viewing angle H 140 V 135 typ For AU Panel H 150 V 135 typ For SEC Panel Pc interface RGB Analog Interface Digital interface Only Dual Input Model Signal connector D Sub 15pin DVI D 24pin Only Dual Input Model Interface frequenc...

Page 10: ...e matrix color TFT LCD Resolution 1280x1024 pixels Display Dot 1280x RGB x 1024 Display Area 376 32mm H x 301 06mm V Pixel Pitch 0 294mm H x 0 294mm V Display Color 16 2M true Lamp Frequency 50kHz typ Lamp Current 7 0 mArms typ Weight 2700g typ Optical Specifications Ta 25 2 C ...

Page 11: ...lor TFT LCD Resolution 1280x1024 pixels Display Dot 1280x RGB x 1024 Display Area 376 32mm H x 301 06mm V Pixel Pitch 0 294mm H x 0 294mm V Display Color 16 2M true Lamp Frequency 60kHz max Lamp Current 7 5 mArms typ Weight 2250g typ Optical Specifications Ta 25 2 C ...

Page 12: ...750 1152x864 75Hz 67 5KHz P 75 P 108 000 1280x1024 60Hz 63 981 P 60 020 P 108 000 SXGA 1280x1024 75Hz 79 976 P 75 025 P 135 000 IBM MODES Horizontal Vertical DOS 720x400 70Hz 31 469 N 70 087 P 28 322 DOS 640x350 70Hz 31 469 P 70 087 N 25 175 XGA 1024x768 72Hz 57 515 P 72 1 P 75 000 MAC MODES VGA 640x480 67Hz 35 000 N 66 667 N 30 240 SVGA 832x624 75Hz 49 725 N 74 551 N 57 2832 1024x768 60Hz 48 780 ...

Page 13: ...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 Video signal DDC Power Board Inverter adapter Board Flat Panel and CCFL backlight Main Board Keyboard RS232 Connector For white balance adjustment in factory mode HOST Computer CCFL Drive AC IN 100V 240V Audio board ...

Page 14: ...14 Main Board Diagram LCD Interface Scaler TSU56AK LF Include ADC OSD etc MCU OSD Control Interface Keypad DVI Connector D SUB Connector EEPROM 24C02 EEPROM 24C02 Crystal 14 318MHZ EEPROM 24C16 ...

Page 15: ...15 Software Flow Chart 1 2 N Y 5 Y N 10 Y N 12 Y N 7 Y N 6 4 3 8 9 14 11 13 Y N 15 Y N 16 17 19 Y N 18 ...

Page 16: ... 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 ...

Page 17: ... 8 EI U202 56G 563 7 AIC1084 33PM U401 56G 562 82 TSU56AK LF U601 56L1125137SZ7 W78E65 40 CN201 33G8027 12 WAFER 2 6P 2 0MM R A CN301 88G 35315F HS D SUB 15PIN CN302 88G 35424F HS DVI CONN 24P CN503 33G802724B H WAFER X401 93G 22 53 CRYSTAL 14 318MHZ X601 93G 22 55 H 20MHZ ...

Page 18: ...18 Front Bezel Item Description 1 Volume 2 Volume 3 POWER KEY 4 MENU ENTER 5 Auto Adjust Key Exit ...

Page 19: ...19 Rear Bezel Item Description 1 D SUB CABLE 2 DVI CABLE 3 AUDIO CABLE 4 AC POWER CORD ...

Page 20: ...ese 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 Description 1 Volume 2 Volume 3 POWER KEY 4 MENU ENTER 5 Auto Adjust Key Exit Chapter 2 ...

Page 21: ...r 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...

Page 22: ...he desired function 3 Press the MENU button to select the function that you want to adjust 4 Press or to change the settings of the current function 5 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 ...

Page 23: ...arm N A Set the color temperate to warm white Cool N A Set the color temperate to cool white User Red User Green User Blue Adjusts Red Green Blue intensity English N A Set OSD display language to English 繁體中文 N A Set OSD display language to Traditional Chinese Deutsch N A Set OSD display language to German Français N A Set OSD display language to French Español N A Set OSD display language to Spai...

Page 24: ... 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 Reset N A Clear each old status of Auto configuration and set the color temperature to Cool Exit N A Save user adjustment and OSD disappear ...

Page 25: ... without this OSD Message Input Not Supported When the Hsync Frequency Vsync Frequency or Resolution is out of the monitor support range will show this message This message will be flying Cable Not Connected 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 No Signal 1 Analog Onl...

Page 26: ...TEK 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 autom...

Page 27: ...s chapter contains step by step procedures on how to assemble the monitor for maintenance Disassembly Procedure Disassemble the base 1 Remove four screws to release stand base Fig 1 2 Remove the hinge Fig 2 Chapter 3 Fig 1 Fig 2 ...

Page 28: ...ont 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 ...

Page 29: ...29 Fig 5 Fig 6 Fig 7 ...

Page 30: ...30 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 ...

Page 31: ...31 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 ...

Page 32: ...emble 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 ...

Page 33: ...33 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 ...

Page 34: ...34 Disassemble the panel 1 Remove four screws right and left to release metal frame Fig 16 Fig16 ...

Page 35: ...d look if the picture is normal Please reinsert and make sure the AC of 100 240 is normal Measure U201 PIN2 2 5V U202 PIN2 3 3V Reinsert or check the power section X401 oscillate waveforms are normal Measure CN201 PIN5 6 12V Measure CN201 PIN9 10 5V OK OK NG NG NG Replace U401 Replace X401 OK NG Check power section Replace U201 U202 NG ...

Page 36: ...re U201 PIN2 2 5V U202 PIN2 3 3V Replace U201 U202 X401 oscillate waveforms are normal Replace X401 Check if the sync signal from computer is output and video cable is connected normally Input the sync signal of computer or change the cable Replace U401 NG OK ...

Page 37: ...re Q402 base is high level Check Q203 and Q204 are broken or CN503 solder Check Correspondent component OK OK OK OK NG NG NG NG Measure U201 PIN2 2 5V U202 PIN2 3 3V Replace U201 U202 X401 oscillate waveforms are normal Replace X401 Replace U401 ...

Page 38: ...d OK OK OSD is unstable or not working Is Keypad board connecting normally Is Button Switch normally Is Keypad board normally Check main board Connect Keypad Board Replace Button Switch Replace Keypad Board OK NG NG NG ...

Page 39: ... line Check the voltage of C905 Check F901 bridge rectified circuit Check start voltage for the pin3 of IC901 Check R906 R907 IC901 Check the auxiliary voltage is between 10V 16V Check IC901 T901 Check ZD901 D903 OK Check D910 D911 IC902 OK NG No power NG NG OK NG ...

Page 40: ...ge Q201 or Q202 Check the pin1 of U201 have saw tooth wave NG OK Change U201 Check D201 D202 has the output of square wave at short time NG OK CheckQ205 Q207 Q203 D201or Q206 Q208 Q204 D202 Check the resonant wave of pin2 pin5 for PT201 PT202 NG Check the output of PT201 PT202 Check Q209 Q210 C213 or Q211 Q212 C214 Check connecter lamp OK NG Change PT201 PT202 OK ...

Page 41: ...er supply of U201 is 12 V Check connecting is ok Reconnect Mute and volume setting is ok Reset mute and volume Check input signal of U201is ok Check correspondent component Replace U201 Replace speaker OK OK OK NG NG NG NG NG ...

Page 42: ...c 7 G Ground 15 DDC Serial Clock 8 B Ground 24 Pin Color Display Signal Cable DVI PIN NO DESCRIPTION PI N NO DESCRIPTION 1 TMDS Data2 13 TMDS Data3 2 TMDS Data2 14 5V Power 3 TMDS Data 2 4 Shield 15 Ground Return for 5V Hsync Vsync 4 TMDS Data4 16 Hot Plug Detect 5 TMDS Data4 17 TMDS Data0 6 DDC Clock 18 TMDS Data0 7 DDC Data 19 TMDS Data 0 5 Shield 8 Analogue Vertical Sync 20 TMDS Data5 9 TMDS Da...

Page 43: ...hatever 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...

Page 44: ...44 Exploded Diagram Model AL1922r ...

Page 45: ... 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 ...

Page 46: ...46 9 Power board PWPC1942AUA9 10 Main board CBPC980KS2AE 11 Key board KEPC980KA8 12 Speakers 78G 332 1 L 78G 332 1 R ...

Page 47: ...LK 4 G 4 R302 100 1 16W R309 100 1 16W FB302 0 1 16W HSI D307 BAV99 3 1 2 RXD 6 VCC5V R315 100 1 16W D320 TZMC5V6 GS08 D323 TZMC5V6 GS08 D321 TZMC5V6 GS08 VCC5V FB304 150 OHM DVI5V VCC5V U301 M24C02WMN6 1 2 3 4 5 6 7 8 A0 A1 A2 GND SDA SCL WP VCC B 4 DAT_DDC2 R326 75 1 16W VSYNC 4 R317 10K 1 16W R301 100 1 16W SOG 4 D319 TZMC5V6 GS08 CLK_DDC2 DAT_DDC D312 BAV99 3 1 2 C307 0 001uF G 4 C311 33pF CN3...

Page 48: ...AVDD_MPLL AVDD_DVI BYPASS AVDD_DVI VDDP VDDP VDDP VDDP VDDP VDDP VDDP VDDC VDDC VDDC VDDC AVSS_DVI AVSS AVSS_MPLL AVSS_LPLL AVSS_PLL AVSS_DVI GNDP GNDP GNDP GNDP GNDP GNDP GNDC GNDC GNDC GNDP GNDC XIN XOUT LVA2P LVA2M LVA1P LVA1M LVA0P LVA0M NC LVB3P NC LVB3M NC LVBCKP NC LVBCKM NC LVB2P NC LVB2M NC LVB1P NC LVB1M NC LVB0P NC LVB0M DDC1_CLK GPO8 DDC1_DAT GPO7 ADO NC AD3 NC AVDD_PLL AVDD AVSS AVSS_...

Page 49: ...VCC5V VAA3 4 C204 220uF 25V C210 0 1uF R210 NC R216 4 7K 1 16W R213 NC Brightness VAA3 VCC5V VCC5V 3 4 6 Q203 AO3401 Q202 PMBS3904 3 2 1 R201 4 7K 1 16W VCC5V VCC2 5 4 VCC5V VCC3 3 R205 4 7K 1 16W C211 47uF 16V VCC12V R215 100K 1 16W C202 220uF 25V CN201 CONN 2 4 6 8 10 12 1 3 5 7 9 11 VAA1 4 TO 263 VAA2 VAA1 VCC2 5 VCC5V C215 47uF 16V DIM VCC3 3 VCC5V VCC12V onBACKLITE 6 C207 0 1uF VCC5V NEW Circ...

Page 50: ...0 9 4 PB9 C511 0 1uF PB2 LVB1P LVB0P LVACKP LVB2M PB4 PB0 RXO0 RXO1 LVB3M RXE1 PA 0 9 4 PA5 LVB0P LVBCKM LVB2P LVACKP RXEC LVA0M PA6 PA7 PB3 RXE3 PB6 C509 47uF 16V PA 0 9 LVB1M VLCD 2 LVA3M LVA1P CN503 CONN 2 4 6 8 10 12 14 16 18 20 22 24 1 3 5 7 9 11 13 15 17 19 21 23 LVB2M LVA1M LVB3P RXE0 LVA0P PA9 PA3 LVB3P R502 0 1 16W LVA0P LVA3P PA0 LVA2M RXE0 RXE2 LVB1P PA1 LVA2P C510 0 1uF RXO3 RXO0 LVA2P...

Page 51: ...V R211 5 6K OUT_R 12V 12V C205 470uF 16V GND R212 220K CN203 WAFER 4P2 0 R A 1 2 3 4 R207 1K C208 470uF 16V R201 10K U201 TDA7496L 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 GND GND GND INL VAROUT_L VOLUME VAROUT_R NC INR SVR STBY MUTE GND OUTR VS VS OUTL GND GND GND GND C212 100 pF C211 100 pF C204 0 47uF C206 0 47uF GND R210 5 6K R203 10K C214 100 pF VOLUME MUTE GND C215 100 pF GND C201 ...

Page 52: ...52 Power board adapter inverter ...

Page 53: ...53 ...

Page 54: ...54 ...

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