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31

Troubleshooting

This chapter provides troubleshooting information for the B203H:

1. No Power

Chapter 4

No power

Press power key and look if the
picture is normal

Please reinsert and make sure the
AC of 100-240 is normal

Reinsert or check the
power section

Check if X401 oscillate waveforms are
normal

Measure U703 Pin2=3.3V,

Check U703, C706 and C707

http://www.wjel.net

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Summary of Contents for B203H

Page 1: ...1 Acer B203H Service Guide h t t p w w w w j e l n e t ...

Page 2: ...2 Service Guide Version and Revision Version Release Date Revision History TPV model TARSNDD8WDAYDN A00 Sep 22 2008 Initial Release TARSNDD8WDAYHN h t t p w w w w j e l n e t ...

Page 3: ...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 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 respectiv...

Page 4: ... 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...

Page 5: ...unded plug z 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 z Do not overload 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 sp...

Page 6: ...Board Layout 18 Installation 19 Screen Position Adjustment 20 Chapter 2 Operating Instructions 22 External Controls 22 Front Panel Controls 22 eColor Management OSD 23 How to Adjust a Setting 24 How To Optimize The DOS Mode 27 Chapter 3 Machine Disassembly 28 Chapter 4 Troubleshooting 31 Chapter 5 Connector Information 37 Chapter 6 FRU Field Replacement Unit List 38 Exploded Diagram 38 Chapter 7 S...

Page 7: ...rmance 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 B203H Panel LTM200KT01 SEC KR Signal Interface D Sub 15pin DVI 24pin Sync Type Separate Compatible Color T...

Page 8: ...that the brightest two of 32 linear distributed gray scales 0 700mv can be distinguished Picture position and size Factory preset value Viewing angle 90 H and V AC Supply voltage 220V 5 50 3Hz Ambient temperature 20 5 Humidity 50 10 Display mode 1600 x 900 60 Hz all white e color mode Set to User mode Measurement systems The units of measure stated in this document are listed below 1 gamma 1 nano ...

Page 9: ...60Hz ON Mode 48W EPA ENERGY STAR OFF Mode 1W Contrast control Set to factory preset value which allows that the brightest two of 32 linear distributed gray scales 0 700mv can be distinguished Power Source 100 V 240 V 50 3Hz 60 3Hz Environmental Considerations Operating Temp 0 to 40 C Storage Temp 30 to 65 C Operating Humidity 0 to 90 Storage Humidity 0 to 90 Peak surge current 55A peak at 240 VAC ...

Page 10: ...10 LCD Panel Specification General Specifications Block Diagram TFT LCD Module h t t p w w w w j e l n e t ...

Page 11: ...11 Back light Unit Electrical Characteristics h t t p w w w w j e l n e t ...

Page 12: ...12 Optical Specifications h t t p w w w w j e l n e t ...

Page 13: ...13 Support Timing h t t p w w w w j e l n e t ...

Page 14: ...a main board a power board and a key board which house the flat panel control logic brightness control logic and DDC The power board will provide AC to DC Inverter voltage to drive the backlight of panel and the main board chips each voltage B203H Audio board Inverter Board include adapter Flat Panel and CCFL backlight Main Board Key board D SUB Signal CCFL Drive AC IN 100V 240V Inverter Board inc...

Page 15: ...0A 100SCE U402 Panel Interface CN301 Crystal 12MHz X401 Keypad Interface CN402 Scalar IC NT68667FG Include MCU ADC OSD U401 D Sub Connector CN101 H sync V sync RGB DVI Connector CN102 D Data D Clock EEPROM M24C16 U403 h t t p w w w w j e l n e t ...

Page 16: ...16 Software Flow Chart N Y 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 h t t p w w w w j e l n e t ...

Page 17: ...en 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 ...

Page 18: ... 4 U703 IC AP1117D33L 13 TO252 3L DIODES CN701 WAFER 9P RIGHT ANELE PITCH U103 IC AZC099 04S SOT23 6L CN301 CONNECTOR U104 IC AZC099 04S SOT23 6L X401 CRYSTAL 12MHz HC 49US ARG6 120 U402 IC PM25LV010A 100SCE SOIC 8 CN101 D SUB 15PIN U403 M24C16 WMN6TP CN102 DVI 24PIN CONN F h t t p w w w w j e l n e t ...

Page 19: ...19 Installation To install the monitor on your host system please follow the steps below Steps h t t p w w w w j e l n e t ...

Page 20: ...20 Screen Position Adjustment h t t p w w w w j e l n e t ...

Page 21: ...21 h t t p w w w w j e l n e t ...

Page 22: ...wering 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 to select scenario mode 4 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 Adjust...

Page 23: ...23 eColor Management OSD h t t p w w w w j e l n e t ...

Page 24: ...24 How to Adjust a Setting h t t p w w w w j e l n e t ...

Page 25: ...25 Adjusting the picture h t t p w w w w j e l n e t ...

Page 26: ...26 h t t p w w w w j e l n e t ...

Page 27: ...input signals 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 mo...

Page 28: ...bly This chapter contains step by step procedures on how to disassemble the monitor for maintenance Disassembly Procedure 1 Remove the hinge assembly 2 Remove the back cover and bezel Chapter 3 h t t p w w w w j e l n e t ...

Page 29: ...29 3 Remove the lamp connectors and remove the screws to remove the panel Put attention to the LVDS cable 4 Remove the screws to remove the main board and power board h t t p w w w w j e l n e t ...

Page 30: ...30 FOR THE V203H AUDIO MODLE 5 The panel h t t p w w w w j e l n e t ...

Page 31: ...r Press power key and look if the picture is normal Please reinsert and make sure the AC of 100 240 is normal Reinsert or check the power section Check if X401 oscillate waveforms are normal Measure U703 Pin2 3 3V OK OK NG NG NG Check U703 C706 and C707 Replace U401 Replace X401 NG OK h t t p w w w w j e l n e t ...

Page 32: ... Replace X401 Measure U703 Pin2 3 3V Check Correspondent component Replace U401 X401 oscillate waveform is normal Check U703 C706 and C707 OK OK OK OK OK NG NG NG NG Check reset circuit of U401 is normal Check HS VS from CN101 is normal Replace X401 Check Correspondent component NG NG OK h t t p w w w w j e l n e t ...

Page 33: ...el X401 oscillate waveform is normal Check CN301is solder and Q302 Q301 is OK Check Correspondent component Replace PANEL Check Correspondent component Replace U401 OK OK OK Replace X401 OK NG NG NG NG Check reset circuit of U401 is normal h t t p w w w w j e l n e t ...

Page 34: ...table or not working Is Key Pad Board connecting normally Connect Key Board Is Button Switch normally Replace Button Switch Y NG NG Is Key Pad Board normally Replace Key Board Y NG Y Check Main Board h t t p w w w w j e l n e t ...

Page 35: ...ltage of C905 Check start voltage for the pin8 of IC901 Check R904 R932 R933 and Change IC901 NG Check the auxiliary voltage is bigger than 10V and smaller than 20V NG NG NG Check Q901 IC903 D905 D906 D907 ZD921 ZD922 Check IC901 pin6 PWM wave Check IC901 NG OK NG OK OK OK OK Check AC line volt 110V or 220V Check AC input h t t p w w w w j e l n e t ...

Page 36: ...nterface board Check IC801 PIN12 12V Change Q808 Check Q802 Q803 PIN5 6 7 8 have the output of square wave at short time Check the output of T801 T802 Change T801 T802 Check connecter lamp OK OK OK NG OK NG NG NG OK NG OK Check the PWM wave from the pin9 10 of IC801 Change IC801 NG h t t p w w w w j e l n e t ...

Page 37: ...37 Connector Information Chapter 5 h t t p w w w w j e l n e t ...

Page 38: ...e 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 ...

Page 39: ... MAINFRAME S3 SCREW 5 SHIELD S4 SCREW 42 D020523 6 REAR COVER B203H DVI S5 SCREW 10 COVER HINGE B203H 1 BEZEL L201WA 8ACER1 P1 10 COVER HINGE 2 POWER LENS 11 HINGE ASSEMBLY 3 KEY BUTTON S1 SCREW 42 D020523 4 MAINFRAME S2 SCREW 5 SHIELD S3 SCREW 6 REAR COVER B203H DVI S5 SCREW h t t p w w w w j e l n e t ...

Page 40: ...40 Part List Above picture show the description of the following component Item Picture Description 1 Main Frame 2 Bezel 3 Panel h t t p w w w w j e l n e t ...

Page 41: ...41 4 Power Board 5 Main Board 6 Audio Board B203H AUDIO h t t p w w w w j e l n e t ...

Page 42: ...42 Schematic Diagram Main Board Chapter 7 h t t p w w w w j e l n e t ...

Page 43: ...43 h t t p w w w w j e l n e t ...

Page 44: ...44 h t t p w w w w j e l n e t ...

Page 45: ...45 h t t p w w w w j e l n e t ...

Page 46: ...46 Power board h t t p w w w w j e l n e t ...

Page 47: ...47 h t t p w w w w j e l n e t ...

Page 48: ...48 Audio board for B203H AUDIO h t t p w w w w j e l n e t ...

Page 49: ...DC1 LED C005 NC AUTO LED_RED POWER_Key ZD002 UDZSNP5 6B 1 2 MENU 0 V C001 NC C002 NC POWER_Key LBADC2 VOL LBADC2 MENU CONNECTOR GND VOL AUTO R003 1K 1 16W 5 LED_BLUE CN001 CONN 1 2 3 4 5 6 C007 NC SW001 JB41 03521 1 2 3 4 5 6 7 8 9 10 11 12 LED_BLUE ZD001 UDZSNP5 6B 1 2 add ZD001 and ZD002 for ESD solution R001 2K OHM 1 16W VOL VOL h t t p w w w w j e l n e t ...

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