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Acer AL1716 AL1716W Service Guide - Page 19

Abnormal screen for VGA source, Troubleshooting continued - al1716w resolution

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18 ACER AL1716W Go to cover page 4.5 Abnormal screen for VGA source Check the R.G.B video signals from computer input on P302 of video connector 4. Troubleshooting (continued) Failure Point: NG 1. No R.G.B video signals output from host computer. Check the computer. 2. VGA video signal cable disconnected OK Check VGA R.G.B input video signals on I306 pin99, pin96, pin93 respectively that their level is 0.5Vp-p to 0.7Vp-p OK Check all LVDS signals being output to P306 from I306? OK Proceed 'Checking the resolution changed IC movement' section Failure Point: In the case of the RED signal. (Green and Blue signals are the same path, too.) 1. Video cable is failure. NG 2. l306 is damaged. 3. FB305, FB307, FB309, FB308, FB306, FB310, R310~R318, C317~C320, C324,C325 is Open 4. R313, R314, R315 is short. Failure Point: NG Printed wire is open between I306 and P306.

Section	Page
Cover Page	1
Important Safety Notice	2
1. Product Specification	3
1.1 Scope	3
1.2 General Requirements	3
1.3 Interface Connectors	4
1.4 Input Signals (Analog RGB Signal Input)	4
1.5 User Controls and Indicators	5
1.6 Monitor Modes and Timing Capability	6
1.7 Controller Requirements	7
1.8 DC - AC Inverter Requirements	7
1.9 Power Supply Requirements	7
1.10 Display Communications Channel	7
2. Flat Panel Specification	8
2.1 General Information	8
2.2 Panel Timings	8
2.3 Polarizer Hardness	8
2.4 Backlight Requirements	8
2.5 Defects	8
2.6 Optical Characteristics	9
2.7 Panel General Information	10
2.8 Back-Light Unit	12
2.9 Switching Characteristics for LVDS Receiver	12
3. Exploded Diagram	13
3.1 Packing Exploded Diagram	13
3.2 Product Exploded Diagram	14
4. Troubleshooting	14
4.1 Power board	15
4.2 Inverter circuit on power board	16
4.3 No.display of screen(Screen is black, color of LED is amber)	17
4.4 Nothing display on screen (screen is black, color of LED is blue)	18
4.5 Abnormal screen for VGA source	19
4.6 Abnormal OSM display adjust problem	20
4.7 Abnormal plug and play for VGA	21
4.8 Checking the control circuit of vertical sync pulse for VGA	22
4.9 Checking the resolution change IC movement	23
5. Spare Parts List	24
6. Schematics and Layouts	32
6.1 ACER_LCD_AL1716W_SCHEMATICS_POWER BOARD	32
6.2 ACER_LCD_AL1716W_SCHEMATICS_INTERFACE_TOP	33
6.3 ACER_LCD_AL1716W_SCHEMATICS_INTERFACE POWER	34
6.4 ACER_LCD_AL1716W_SCHEMATICS_INTERFACE BD_VGA & DDC INTERFACE	35
6.5 ACER_LCD_AL1716W_SCHEMATICS_INTERFACE BD_DVI & DDC INTERFACE	36
6.6 ACER_LCD_AL1716W_SCHEMATICS_INTERFACE BD_SCALER_GM5726H	37
6.7 ACER_LCD_AL1716W_SCHEMATICS_INTERFACE BD_KEY & PANEL INTERFACE	38
6.8 ACER_LCD_AL1716W_SCHEMATICS_INTERFACE BD_AUDIO	39
6.9 ACER_LCD_AL1716W_LAYOUTS_POWER BOARD	40
6.10 ACER_LCD_AL1716W_LAYOUTS_INTERFACE BOARD	41
7. Assembly and Disassembly Procedures	42
7.1 Assembly Procedures	42

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