ACER AL1716x Service Manual

Acer AL1716x

Service Guide

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Copyright

Copyright © 2005 by Acer Incorporated. All rights reserved. No part of this publication may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language or computer language, I any form or by any means, electronic, mechanical, magnetic, optical, chemical, manual or otherwise, without the prior written permission of Acer Incorporated.

Disclaimer

The information in this guide is subject to change without notice. Acer Incorporated makes no representations or warranties, either expressed or implied, with respect to the contents hereof and specifically disclaims any warranties of merchantability or fitness for any particular purpose. Any Acer Incorporated software described in this manual is sold or licensed “as is”. Should the programs prove defective following their purchase, the buyer (and not Acer Incorporated, its distributor, or its dealer) assumes the entire cost of all necessary servicing, repair, and any incidental or consequential damages reulting 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 respective holders.

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Conventions

The following conventions are used in this manual

Screen Messages	Denotes actual messages that appear on
	screen.
NOTE	Give bits and pieces of additional
	information related to the current topic.
WARNING	Alerts you to any damage that might result
	from doing or not doing specific actions.
CAUTION	Gives precautionary measures to avoid
	possible hardware or software
	problems.
IMPORTANT	Reminds you to do specific actions relevant
	to the accomplishments of procedures.

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Preface

Before using this information and the product it supports, please read the following general information.

1.This Service Guide provides you with all technical information relating to the BASIC CONFIGURATION decided for Acer’s “global” product offering. To better fit local market requirements and enhance product competitiveness, your regional office MAY have decided to extend the functionality of a machine (e.g. add-on card, modem, or extra memory capability). These LOCALIZED FEATURES will NOT be covered in this generic service guide. In such cased, please contact your regional offices or the responsible personnel/channel to provide you with further technical details.

2.Please not WHEN ORDER FRU PARTS, that you should check the most up-to-date information available on your regional web or channel. If, for whatever reason, a part number change is made, it will not be noted in the printed Service Guide. For ACER-AUTHORIZED SERVICE PROVIEDERS, your Acer office may have a DIFFERENT part number code to those given in the FRU list of this printed Service Guide. You MUST use the list provided by your regional Acer office to order FRU parts for repair and service of customer machines.

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WARNING (FOR FCC CERTIFIED MODELS)

NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference 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 reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

1.Reorient or relocate the receiving antenna.

2.Increase the separation between the equipment and receiver.

3.Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

4.Consult the dealer or an experienced radio/TV technician for help.

Notice:

1.The changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.

2.Shielded interface cables and AC power cord, if any, must be used in order to comply with the emission limits.

3.The manufacturer is not responsible for any radio or TV interference caused by unauthorized modification to this equipment. It is the responsibility of the user to correct such interference. As an ENERGY STAR Partner our company has determined that this product meets the ENERGY STAR guidelines for energy efficiency.

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WARNING:

To prevent fire or shock hazard, do not expose the monitor to rain or moisture. Dangerously high voltages are present inside the monitor. Do not open the cabinet. Refer servicing to qualified personnel only

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PRECAUTIONS

Do not use the monitor near water, e.g. near a bathtub, washbowl, kitchen sink, laundry tub, swimming pool or in a wet basement.

Do not place the monitor on an unstable trolley, stand, or table. If the monitor falls, it can injure a person and cause serious damage to the appliance. User only a trolley or stand recommended by the manufacturer or sold with the monitor. If you mount the monitor on a wall or shelf, use a mounting kit approved by the manufacturer and following the kit instructions.

Slots and openings in the back and bottom of the cabinet are provide for ventilation. To ensure reliable operation of the monitor and to protect it from overheating, be sure these openings are not blocked or covered. Do not place the monitor on a bed, sofa, rug, or similar surface. Do not place the monitor near or over a radiator or heat register. Do not place the monitor in a bookcase or cabinet unless proper ventilation is provided.

The monitor should be operated only from the type of power source indicated on the label. If you are not sure of the type of power supplied to your home, consult your dealer or local power company.

The monitor is equipped with a three-pronged grounded plug, a plug with a third (grounding) pin. This plug will fit only into a grounded power outlet as a safety feature. If your outlet does not accommodate the three-wire plug, have an electrician install the correct outlet, or use an adapter to ground the appliance safely. Do not defeat the safety purpose of the grounded plug.

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.

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 attempt to service the monitor yourself; opening or removing covers can expose you to dangerous voltages and other hazards. Please refer all servicing to qualified service personnel.

To ensure satisfactory operation, use the monitor only with UL listed computers which have appropriate configured receptacles marked between 100-240V AC, Min. 3.5A.

The wall socket shall be installed near the equipment and shall be easily accessible.

SPECIAL NOTES ON LCD MONITORS

The following symptoms are normal with LCD monitor and do not indicated a problem.

NOTES

Due to the nature of the fluorescent light, the screen may flicker during initial use. Turn off the Power Switch and then turn it on again to make sure the flicker disappears.

You may find slightly uneven brightness on the screen depending on the desktop pattern you use.

The LCD screen has effective pixels of 99.99% or more. It may include blemishes of 0.01% or less such as a missing pixel or a pixel lit all of the time.

Due to the nature of the LCD screen, an afterimage of the previous screen may remain after switching the image, when

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the same image is displayed for hours. In this case, the screen is recovered slowly by changing the image or turning off

the Power Switch for hours.

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Table of Contents

Chapter 1 Monitor Features

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Monitor Features……………………………………………………………………

Factory Preset Timing Table……………………………………………………..

Monitor Block Diagram……………………………………………………………

Interface Board Diagram………………………………………………………….

Software Flow Chart……………………………………………………………….

Interface Board PCB Layout……………………………………………………..

Front Bezel………………………………………………………………………….

Rear Cover………………………………………………………………………….

Chapter 2 Operating Instruction

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Front Bezel Control……………………………………………………………….. Adjusting the Monitor…………………………………………………………….. How to Optimize the DOS-Mode…………………………………………………

Chapter 3 Machine Assembly	27
Chapter 4 Troubleshooting	31

Common Acknowledge……………………………………………………………

Interface Board Troubleshooting………………………………………………..

QPI PCBA Troubleshooting……………………………………………………….

Chapter 5	Connector Information	40
VGA Connector Pin Assignment…………………………………………………
Chapter 6	FRU (Field Replaceable Unit)	42
Exploded Diagram…………………………………………………………………..
Part List……………………………………………………………………………….
Chapter 7	Schematic Diagram	43

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MONITOR FEATURES

		Driving System	TFT Color LCD
	LCD Panel	Size	17”
		Pixel pitch	0.264mm (H) x 0.264mm (V)
			140 (H), 130 (V)
		Viewable angle
			300cd/m2 (typ.)
		Brightness
		Contrast Ratio	500:1 (typ.)
		Response Time	12ms (typ.)
	Signal	Video	RGB Analog Interface (Analog only model)
		Separate Sync.	H/V TTL
		H-Frequency	31.5KHz to 60.241KHz
		V-Frequency	56Hz to 75Hz
	Display Color		6bits+FRC
	Dot Clock		80MHz
	Max. Resolution		1024 x 768 @75Hz
	Plug & Play		VESA DDC 1/2B
	EPA ENGERGY STAR	ON MODE	< 35W
		OFF MODE	<5W
	Input Connector		D-Sub 15pin
			Three-Pronged Pin
	Input Video Signal		Analog: 0.7Vp-p (Standard), 75 OHM,
			Positive (Analog-Only Model)
	Maximum Screen Size	Horizontal	338 mm
		Vertical	270 mm
	Power Source		100~240VAC, 50~60Hz
			Operating Temp: 5 to 35
	Environmental Considerations
			Storage Temp: -20 to 60
			Operating Humidity: 5% to 95%
	Weight (Net)		4.3Kg
	Dimension		343.4 (W) x 351.4 (H) x 159.8 (D) mm

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External Controls	Switch	Power Switch	Menu
		>
		< Auto
	Function	Contrast/Brightness Phase/Clock H. Position/ V. Position
		Color (Warm, Cool, User) Language OSD (H. Position, V.
		Position, Timeout)	Auto Config Information
		Reset
		Exit
Regulatory Compliance		UL, CSA, TUS+GS, CG, PSB, B-MARK, PSE, Ergo, FCC, BSMI,
		VCCI, C-Tick, TCO99, CCC, WHQL

FACTORY PRESET TIMING TABLE

Standard	Resolution	Horizontal Frequency (KHz)		Vertical Frequency (Hz)
VGA	640 x 480	31.469	60.000
	640 x 480	37.861	72.809
	640 x 480	37.500	75.000
SVGA	800 x 600	35.156	56.250
	800 x 600	37.879	60.317
	800 x 600	48.077	72.188
	800 x 600	46.875	75.000
XGA	1024 x 768	48.363	60.004
	1024 x 768	56.476	70.069
	1024 x 768	60.023	75.029
SXGA	1280 x 1024	63.981	60.020
	1280 x 1024	79.976	75.025
IBM	640 x 350	31.469	70.087
	720 x 400	31.470	70.080
MAC	832 x 624	49.725	74.551

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	1024 x 768	48.780	60.001
	1024 x 768	60.241	74.927

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Monitor Block Diagram

The LCD monitor contains 4 parts:

1.interface board: Deal with VGA input signal and output the signal to panel.

2.Power/inverter board: Provide power to interface board and panel

3.Keypad board: For user to control the LCD monitor.

4.Flat panel:

Flat panel (LVDS interface) and CCFL
Inverter/Power BD	Interface Board (VGA input)
(Including AC/DC
Power Supply and
Inverter)
	Keypad BD
AC input	Host computer
Range 90V~264V	(VGA signal input and DDC)

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MAIN BOARD DIAGRAM

Interface Board

Red			A/D	To
Green			&
				LCD
Blue			Scaling
				module
			&
Vsync
			OSD
Hsync
SCL		MCU		EEPROM
SDA
	DDC

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Software Flow Chart

ACER 17” flow chart item description:

1.MCU initialize.

2.Is the EEProm blank?

3.Program the EEProm by default values.

4.Get the user value and mode setting from EEProm.

5.Are the factory key pressed?

6.Enter factory mode.

7.Check the analog port, are there any signal coming?

8.Display “No Signal” message.

9.Enter sleep mode.

10.Wake up the scalar.

11.Program the scalar to be able to show the coming mode.

12.Turn on the LED and set it to green color.

13.Process the OSD display

14.Read the keyboard. Is any key pressed?

(1)
(2)
No
(4)
(5)
No
(7)
Y
(10)
(11)
(12)
(13)
(14)
No

Y (3)

Y	(6)
No	(8)
	(9)

Y

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