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Acer AL1716 AL1716W Service Guide - Page 23

Checking the resolution change IC movement, Troubleshooting continued

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22 ACER AL1716W Go to cover page 4. Troubleshooting (continued) 4.9 Checking the resolution change IC movement 1. Check +3V3 supplied on I306 pin2, pin25, pin53, pin47, pin74, pin82, pin91, pin92, pin101. pin110, pin116 2. Check +3V3 supplied on I309 pin8. NG Proceed 'Checking the DC/DC converter circuit' section OK 1. Check +1V8 supplied on I306 pin55, pin87, pin17, pin118, pin70, pin78, pin104, pin106. 2. Check +1V8 supply on I305 pin46, pin53, pin86, and pin122. NG Proceed 'Checking the DC/DC converter circuit' section OK Check X301 14.318MHz clock input to I306 pin108 and pin109 at TTL level OK Check I306 pin111 RSTB signal is high level at normal operation. OK 1.Check I309 pin8, pin3, pin5, pin6. 2.Check I308 pin5, pin6, pin7, pin8. Failure Point: 1. Printed wire broke between X301 and I306 pin108 NG and pin109 2. C362 or C373 may be short or open. 3. X301 is damaged. Failure Point: 1. Printed wire broke between I306 pin111 and I307 NG pin2. 2. C375 is short. 3. I307 or I306, Q305 is damaged. 4. R349, R348 is open. Failure Point: 1. Printed wire broke between I309 pin5, pin6 and NG I306 pin61, pin62. 2. I306, I309 is defected. 3. R362,R364,R365,R366,R359,R360 or R361 is open. OK Failure Point: I306 is defected.

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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