Acer AL532SG Schematic

AL532

Service Manual

TABLE OF CONTENTS

SERVICE WARNING

A. IMPORTANT SAFETY INSTRUCTION

B. SPECIFICATIONS

C. TIMING CHART

D. CONTROL LOCATION

E. CONDUCTION VIEW

F. ADJUSTMENT PROCEDURE

G. TROUBLE SHOOTING HINTS

H. REPLACEMENT PARTS LIST

I. BLOCK DIAGRAM

J. SCHEMATIC DIAGRAM

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WARNING

To prevent from fire or shock hazard,do not expose monitor to any rain or any form of water.High voltage is
inside the monitor so please do not remove the back cover of the cabinet if you are not a qualified monitor
engineer.Contact the local dealer or the nearest Acer branch office if you need help.

A. IMPORTANT SAFETY INSTRUCTION

Prior to using this service manual,please ensure that you have carefully followed all the procedures outlined in
the user's manual for this product.

1. Read all of these instructions.

2. Save these instructions.

3. Follow all warnings and instructions a marked on the product.

4. Unplug this product from the wall outlet before cleaning.Do not use liquid cleaners or aerosol

cleaners, use a damp cloth for cleaning.

5. Do not use this product near water.

6. Do not place this product on an unstable cart,stand or tablle.The product may fall,causing serious

damage to the product.

7. Slots and openings in the cabinet and the back or bottom are provided for ventilation,to ensure
reliable operation of the product and to protect it from overheating,those openings must not be
blocked or covered.The openings should never be blocked by placing the product on a bed,sofa, rug,
or other similar surface.This product should not be placed in a built-in installation less proper
ventilation is provided.

8. This products should be operated from the type of power source indicated on the marketin label.
If you are not sure of the type of power available, consult your dealer or local power company

9. This product is equipped with a 3-wire grounding type plug,a plug having a third (grounding)
pin.This plug will only fit into a grounding-type power outlet.This is a safety feature,if you are
unable to insert the plug into the outlet,contact your electrician to replace your obsolete outlet.Do
not defeat the purpose of the grounding-type plug.

10. Do not allow anything to rest on the power cord.Do not locate this product where persons will walk
on the cord.

11. If an extension cord is used with this product,make sure that the total of the ampere ratings on the
product plugged into the extension cord to the waplugged into outlet does not exceed 15 ampere.

12. Never push objects of any kind into this product through cabinet slots as they may touch dangerous
voltage points or short out parts that could result in a risk of fire or electric shock.Never spill liquid
of any kind on the product.

13. Do not attempt to service this product yourself,as opening or removing covers may expose you to
dangerous voltage points or other risks.Refer all servicing to service personnel.

14. Unplug this product from the wall outlet and refer servicing to qualified service personnel under the
following conditions.

a. When the power cord or plug is damaged or frayed.
b. If liquid has been spilled into the product.
c. If the product has been exposed to rain or water.
d. If the product does not operate normally,when the operating instructions are followed.Adjust

only those controls that are covered by the operating instructions since improper adjustment of
other controls may result in damage and will often require extension work by a qualified
technician to restore the product to normal operation.

e. If the product has been dropped or the cabinet has been damaged.

f.

If the product exhibits a distinct change in performance,indicating a need for service.

B. SPECIFICATIONS

Maximum Resolution

1.

Recommend Resolution

2.

Synchronization Range

3.

Horizontal
Vertical

Active Display Area

4.

Dot Pitch

5.

Support display colors

6.

Contrast Ratio (Typical)

7.

Luminance of White

8.

Bandwidth

9.

User Control

10.

OSD Function

11.

View Angle

12.

Horizontal
Vertical

Power Source

13.

Power Consumption

14.

Connection Type

15.

Input Signal

16.

Video
Sync.

Color Temperature

17.

Dimension (WxHxD)

18.

Monitor Weight

19.

Base Operation

20.

Tilt

Power Saving

21.

ON
STAND BY
OFF

Signal Connector Pin Assignment

22.

Pin No.

1. Red 9. 5V

2. Green 10. Sync. Ground

3. Blue 11. Ground

4. Ground 12. SDA (For DDC)

5. Self Test 13. Horizontal Sync.

6. Red Ground 14. Vertical Sync.

7. Green Ground 15. SCL (For DDC)

8. Blue Ground
Audio signal

23.

1024 x 768 @ 75Hz
1024 x 768 @ 60Hz

31 – 60 KHz
56– 75 Hz

304.1mm (H) x 228.1mm (V)

0.297(H) x 0.297(V) mm

16.7M color
500
300cd/m²
80MHz
4 Key Switch
Brightness, Conrast, H-Position, V-Position, H-Size, Phase,
Color Select, Auto, Reset, Language, OSD Adjust, Exit

140 Degrees
120 Degrees
100 – 240 Vac 60 / 50 Hz
36W (max.)
15 Pin D Type

Analog R.G.B. , 0.7Vp-p / 75 Ohms
TTL level,positive or negative polarity

Cool / Warm
418mm x 421mm x 188mm

3.3 Kg

0 / + 15 degree

＜ 36W
＜ 5W
＜ 5W

3.5Φ stereo phone jack
Input Sensitivity : 200mV
2+2W 8Ω Speaker

DC

C.TIMING CHART

Video

Back porch Active display Front porch

Sync.

Sync-width
Total

Preset

Modes

VGA

720X400

VGA

640X480

VESA

640X480

VESA

640X480

VESA

800X600

VESA

800X600

Pixel clock

H-Frequency

(KHz)

H-Total (µ

H-Active Display (µs)

H-Blanking (µs)

Front Porch (µs)

H-Sync-width (µs)

H-Back Porch (µs)

V-Frequency

V-Total
(ms)

V-Active Display (ms)

28.325 25.175 31.500 31.500 36.000 40.000

31.472 31.469 37.861 37.500 35.156 37.879

31.774 31.778 26.413 26.667 28.444 26.400

s)

25.419 25.422 20.317 20.317 22.222 20.000

6.355 6.356 6.095 6.349 6.222 6.400

0.635 0.636 0.762 0.508 0.667 1.000

3.813 3.813 1.270 2.032 2.000 3.200

1.906 1.907 4.063 3.810 3.556 2.200

70.1 59.94 72.81 75.0 56.25 60.3

14.267 16.683 13.735 13.333 17.778 16.579

12.710 15.253 12.678 12.800 17.067 15.840

V-Blanking (ms)

V-Front Porch (ms)

V-Sync-width (ms)

V-Back Porch (ms)

H/V Sync. Polarity

Interlace

1.557 1.430 1.057 0.533 0.711 0.739

0.413 0.318 0.238 0.027 0.028 0.026

0.064 0.064 0.079 0.080 0.057 0.106

1.080 1.049 0.740 0.427 0.626 0.607

－ ＋ － － － － － － ＋ ＋ ＋ ＋

NONE NONE NONE NONE NONE NONE

Preset

Modes

VESA

800X600

VESA

800X600

VESA

1024X768

VESA

1024X768

VESA

1024X768

Pixel clock (MHz)

H-Frequency (KHz)

H-Total (µs)

H-Active Display (µs)

H-Blanking (µs)

Front Porch (µs)

H-Sync-width (µs)

H-Back Porch (µs)

V-Frequency (Hz)

V-Total (ms)

V-Active Display (ms)

V-Blanking (ms)

50.000 49.500 65.000 75.000 78.750

48.077 46.875 48.363 56.476 60.023

20.800 21.333 20.677 17.707 16.660

16.000 16.162 15.754 13.563 13.003

4.800 5.172 4.923 4.053 3.657

1.120 0.323 0.369 0.320 0.203

2.400 1.616 2.092 1.813 1.219

1.280 3.232 2.462 1.920 2.235

72.2 75.0 60.0 70.1 75.0

13.853 13.333 16.666 14.272 13.328

12.480 12.800 15.880 13.599 12.795

1.373 0.533 0.786 0.673 0.533

V-Front Porch (ms)

V-Sync-width (ms)

V-Back Porch (ms)

H/V Sync. Polarity

Interlace

0.770 0.021 0.062 0.053 0.017

0.125 0.064 0.124 0.106 0.050

0.478 0.448 0.600 0.513 0.466

＋ ＋ ＋ ＋ － － － － ＋ ＋

NONE NONE NONE NONE NONE

D. CONTROL LOCATION

Font control panel

1. Menu Button

2. Select Button

3. Auto Button

4. Power Button

5. LED (Power Display)

Rear panel

1. VGA Signal Cable

2. Power jack

3. Line in jack

E. CONDUCTION VIEW

MAIN BOARD (Component Side)

MAIN BOARD (Solid Side)

CONTROL BOARD (Component Side)

CONTROL BOARD (Solid Side)