AL1916p Service Guide
Page 21
Power board (include: AC/DC,inverter) - 21 - The Adapter 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. MONITOR BLOCK DIAGRAM The LCD monitor will provide thr 12V DC-power to inverter/ power board. The inverter board will drive the backlight of panel and the DC-DC conversion.
Power board (include: AC/DC,inverter) - 21 - The Adapter 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. MONITOR BLOCK DIAGRAM The LCD monitor will provide thr 12V DC-power to inverter/ power board. The inverter board will drive the backlight of panel and the DC-DC conversion.
AL1916p Service Guide
Page 36
... cap. --- 3% 2.Band width is within 20MHz 50~100% or 100~50% Dynamic Load load change of Over / Under @ Power line on/off --- ±5% --- Luminance / Max. --- Backlight ON/OFF Control ON OFF Brightness Adjust Min. Luminance Output Voltage Vin=15V, Iout=7.5mA Brightness lamp current in 7.5mA 250 Output Current(Each Vbri...
... cap. --- 3% 2.Band width is within 20MHz 50~100% or 100~50% Dynamic Load load change of Over / Under @ Power line on/off --- ±5% --- Luminance / Max. --- Backlight ON/OFF Control ON OFF Brightness Adjust Min. Luminance Output Voltage Vin=15V, Iout=7.5mA Brightness lamp current in 7.5mA 250 Output Current(Each Vbri...
AL1916p Service Guide
Page 40
Recall Cool Color Temperature from EEPROM. Adjustment Range 0-100 Brightness Backlight Adjustment 0-100 Focus Clock H. Adjust the verticalposition of the 0-100 picture. Position V. Recall Warm Color Temperature N/A from N/A EEPROM. Adjust the horizontal position of the 0-100 ...
Recall Cool Color Temperature from EEPROM. Adjustment Range 0-100 Brightness Backlight Adjustment 0-100 Focus Clock H. Adjust the verticalposition of the 0-100 picture. Position V. Recall Warm Color Temperature N/A from N/A EEPROM. Adjust the horizontal position of the 0-100 ...
AL1916v Service Guide
Page 12
CCFL Drive. Monitor Block Diagram The LCD MONITOR will drive the backlight of panel. The Inverter board will contain a main board, a power board, keypad board and audio board which house the flat panel control logic, brightness control logic and DDC. Flat Panel and CCFL backlight Power Board (Inverter, adapter Board) AC-IN 100V-240V Main Board Audio board Keyboard RS232 Connector For white balance adjustment in factory mode HOST Computer Video signal, DDC 11
CCFL Drive. Monitor Block Diagram The LCD MONITOR will drive the backlight of panel. The Inverter board will contain a main board, a power board, keypad board and audio board which house the flat panel control logic, brightness control logic and DDC. Flat Panel and CCFL backlight Power Board (Inverter, adapter Board) AC-IN 100V-240V Main Board Audio board Keyboard RS232 Connector For white balance adjustment in factory mode HOST Computer Video signal, DDC 11
AL1916v Service Guide
Page 22
... of the OSD. Set OSD display language to Simplified Chinese. V. User / Red Red Gain from Digital-register. Set OSD display language to Traditional Chinese. H. b. H. Brightness Backlight Adjustment Focus Adjust Picture Phase to reduce Horizontal-Line noise Clock Adjust picture Clock to Spain. Position Adjust the horizontal position of the picture. Set...
... of the OSD. Set OSD display language to Simplified Chinese. V. User / Red Red Gain from Digital-register. Set OSD display language to Traditional Chinese. H. b. H. Brightness Backlight Adjustment Focus Adjust Picture Phase to reduce Horizontal-Line noise Clock Adjust picture Clock to Spain. Position Adjust the horizontal position of the picture. Set...
AL1916v Service Guide
Page 37
No Backlight Check C201 (+) =12V NG OK Change F902 Check Q203/D201 Check ON/OFF signal NG OK Check U201 pin9=12V ? NG CheckQ205/Q207/Q203/Q201or OK /Q206/Q208/Q204/D202 Check the resonant wave of pin2 & pin5 for PT201/ PT202 OK NG Check Q206/Q207/C211 Check the output of square wave at short time. Check Interface board NG OK Check the pin1 of U201 have saw tooth wave Change Q201 or Q202 NG Change U201 OK Check D201 (-) has the output of PT201/PT202 NG OK Check connecter & lamp Change PT201/PT202 36
No Backlight Check C201 (+) =12V NG OK Change F902 Check Q203/D201 Check ON/OFF signal NG OK Check U201 pin9=12V ? NG CheckQ205/Q207/Q203/Q201or OK /Q206/Q208/Q204/D202 Check the resonant wave of pin2 & pin5 for PT201/ PT202 OK NG Check Q206/Q207/C211 Check the output of square wave at short time. Check Interface board NG OK Check the pin1 of U201 have saw tooth wave Change Q201 or Q202 NG Change U201 OK Check D201 (-) has the output of PT201/PT202 NG OK Check connecter & lamp Change PT201/PT202 36
AL1916W Service Guide
Page 12
... should be stabilized at given temperature for 30 minutes in a windless room. In order to stabilize the luminance, the measurement should be executed after lighting Backlight for 30 minutes to avoid abrupt temperature change during measuring.
... should be stabilized at given temperature for 30 minutes in a windless room. In order to stabilize the luminance, the measurement should be executed after lighting Backlight for 30 minutes to avoid abrupt temperature change during measuring.
AL1916W Service Guide
Page 21
Remove 2 pieces of Backlight wires. Remove 2 pieces of Backlight wires. Loose and remove 2 screws Loose and remove 2 screws Remove the PCBA Cover Completed Loose and remove 4 screws Remove Lips Board 21
Remove 2 pieces of Backlight wires. Remove 2 pieces of Backlight wires. Loose and remove 2 screws Loose and remove 2 screws Remove the PCBA Cover Completed Loose and remove 4 screws Remove Lips Board 21
AL1916W Service Guide
Page 22
Take OSD PCBA apart 22 Completed Remove 2 pieces of FFC from AD PCBA and Backlight Loose and remove 4 screws Remove FFC Remove AD PCBA Completed Separate OSD PCBA.
Take OSD PCBA apart 22 Completed Remove 2 pieces of FFC from AD PCBA and Backlight Loose and remove 4 screws Remove FFC Remove AD PCBA Completed Separate OSD PCBA.
AL1916W Service Guide
Page 23
3.2 Assembly Procedures Place OSD PCBA. Push OSD PCBA Place LCD module Insert new AD PCBA Insert a piece of FFC to AD PCBA Fasten 4 fixed screws of AD PCBA Insert 2 pieces of FFC to AD PCBA and Backlight Completed 23
3.2 Assembly Procedures Place OSD PCBA. Push OSD PCBA Place LCD module Insert new AD PCBA Insert a piece of FFC to AD PCBA Fasten 4 fixed screws of AD PCBA Insert 2 pieces of FFC to AD PCBA and Backlight Completed 23
AL1916W Service Guide
Page 24
Insert 2 pieces of Backlight wires. Insert new Lips Board Fasten 4 fixed screws of Lips Board Completed Join the PCBA Cover Fasten 2 screws Fasten 2 screws Insert 2 pieces of Backlight wires. 24
Insert 2 pieces of Backlight wires. Insert new Lips Board Fasten 4 fixed screws of Lips Board Completed Join the PCBA Cover Fasten 2 screws Fasten 2 screws Insert 2 pieces of Backlight wires. 24
AL1916W Service Guide
Page 32
Connector Information 5.1 Function Block Diagram Chapter 5 Audio In D-sub Analog Video DC -19V OSD Key Pad/Audio AMP Speakers Main Board DC/DC DC-19V Inverter 3.3V Signal LCD Module Backlight 32
Connector Information 5.1 Function Block Diagram Chapter 5 Audio In D-sub Analog Video DC -19V OSD Key Pad/Audio AMP Speakers Main Board DC/DC DC-19V Inverter 3.3V Signal LCD Module Backlight 32
AL1916W Service Guide
Page 37
Item 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Parts Name BEZEL ASSY MATEL FRAME FRONT TFT PANEL ASSY BACKLIGHT UNIT MYLAR COVER PCBAX SCREW M3*4L POWER PCB ASSY AD PCB ASSY SCREW M3*4L SCREW M4*10L COVER AD SCREW M3*4L STAND OFF SUPPORT FLATE SCREW M3*4L OSD FFC OSD PCB ASSY REAR ASSY SCREW M3*10L SCREW D3*8L STAND ASSY SCREW M4*15L COVER HINGE SEAT ASSY Q'ty 1 1 1 1 1 3 1 1 7 1 1 2 4 1 4 1 1 1 4 1 1 4 1 1 37
Item 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Parts Name BEZEL ASSY MATEL FRAME FRONT TFT PANEL ASSY BACKLIGHT UNIT MYLAR COVER PCBAX SCREW M3*4L POWER PCB ASSY AD PCB ASSY SCREW M3*4L SCREW M4*10L COVER AD SCREW M3*4L STAND OFF SUPPORT FLATE SCREW M3*4L OSD FFC OSD PCB ASSY REAR ASSY SCREW M3*10L SCREW D3*8L STAND ASSY SCREW M4*15L COVER HINGE SEAT ASSY Q'ty 1 1 1 1 1 3 1 1 7 1 1 2 4 1 4 1 1 1 4 1 1 4 1 1 37