Acer AM501 Schematic

AM 501

Service Guide 15-inch CRT Monitor

REGULATION COMPLIANCE

This monitor comply to the most current revisions of following regulations:

UL 1950

CSA C22.2 No. 950

EN 60 950

ZH 1/618

ISO 9241-3

ISO 9241-8

21 CFR 1002.10

and 1002.12

47 CFR, Chapter 1, Subpart A, part 15, Subpart B

EN 55 022

Standard for safety of Information Technology Equipment including Electrical Business Equipment.

Safety of Information Technology Equipment including Electrical Business Equipment.

Safety regulation for display work places in the office sector.

Ergonomic requirements for office work with visual display terminals ( VDTz )-Part3 : visual display requirements.

Ergonomic requirements for office work with visual display terminals (VDTS)-part 8: requirements for displayed colors.

Guide for compliance with television receiver reporting and testing program requirements.

A digital device that is marketed for use in a residential environment not withstanding use in commercial, business and industrial environments

Specification for limits and methods of measurement of radio interference characteristics of information technology equipment.

MPR 1990:8

MPR 1990:10

EMC Directive

( 89/336/EEC )

LVD Directive

( 73/ 23/ EEC )

Test methods for visual display units.

User's handbook for evaluating visual display units.

Council directive of 3 May 1989 on the approximation of the laws of Member States relating to electromagnetic Compatibility.

Council directive of 19 February 1973 on the harmonization of the laws of Member States relating to electrical equipment designed for use within certain voltage limits.

2.2 Connecting the Monitor and Stand

Align the stand’s four tabs with the slots on the bottom of the monitor.

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 Insert the tabs into the slots.

Slide the stand towards the front of the monitor.

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Special protection on control knobs and LED indicator needs to be taken care while you place the CRT

NOTE:

side of side of monitor downwards. Such concern will escape the permanent damage occurred on

encoder and LED lens from excessive pressure.

Figure 1: Monitor and Stand Connection

2.3 Choosing A Workstation

When choosing an appropriate workspace, keep these few things in mind:

A sturdy, level surface.

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An electrical wall outlet and a telephone wall jack near the computer.

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At least 3-inch clearance at the back of the computer to allow for the required airflow.

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Do not place near a window. Exposing the Monitor to direct sunlight for extended periods may

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damage the unit.

You may want to use a desk lamp to adjust the ambient lighting for your viewing comfort.

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A viewing filter is recommended to reduce eye stress and fatigue.

Figure 2: The Workstation (This bevel is representative)

2.4 The AC Connection

Locate the AC port on the rear of the monitor.

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Plug the female end of the AC cord into the AC port.

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Plug the male end into the power supply.

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Figure 3: Connecting the Power Cord

2.5 The Signal Cable Connection

Locate the ON/OFF power switch. See Figure 4.

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Make sure that the Monitor power switch is in the OFF position. The OFF position is indicated with a

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circular icon.

Figure 4: ON/OFF Power Switch

 Locate the VGA port on the rear of the PC. The signal cable has a standard 15-pin mini D-sub (VGA)

connector. If you are having trouble locating the VGA port, please refer to the documentation, which

came with your PC.

Connect the Signal cable to the PC’s VGA port.

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Figure 5: Connecting the Signal Cable

2.6 Monitor Tilt and swivel Adjustments

The monitor is capable of both tilt and swivel adjustments.

Figure 6: Tilt Adjustment

With the tilt feature, the monitor is capable of vertical adjustments of +15° to -5°.

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The swivel feature allows for horizontal monitor adjustments of +45° to -45°.

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Figure 7: Swivel Adjustment

3.0 FRONT CONTROLS

3.1 USER CONTROLS

Figure 8: User Controls (This begel is representative)

1 Power Switch

Turns the monitor on and

off

Light Suspend

Flash Sleep

3 Reset

5 Select button

Resets default values.

For selecting functions.

2 Power LED Indicator

Green States

4 Adjustments

6 Function LED Indicator

1) When the highest or lowest possible setting for a particular

display control has been reached, its corresponding LED will

flash.

Light

For adjusting the display in the selected

function.

Standby

Status

2) When the 2nd LED’s light is on, follow the 2nd function’s

indication.

3) When the input timing is not the preset timing, the recall

function will not function.

3.2 OSD Icon Summary

Icon Function Function Description

Brightness

Contrast

H. Size

H. Position

V. Position

Pincushion

Trapezoid

V. Si z e

Adjusts display brightness

Adjusts display contrast

Increases and decreases screen width

Shifts display image right or left

Increase and decrease screen height

Shifts display image up or down

Adjusts concave and convex portion of pincushion effect

Adjusts the top and bottom display widths

4.0 SPECIFICATION

4.1 CRT Description

This display unit shall employ a CRT complying with the following specification:

Size: 15 inches diagonal

Deflection angle: 90 degrees diagonal

Electron gun: In-line type

Focusing method: Electrostatic

Focus lens: Bipotential

Convergence method: Magnetic

Surround type: Black matrix

Array: Dot trios

Trio spacing: 0.28 mm dot pitch

Phosphor type: P22 or equivalent

Phosphor persistence: Medium-short

Light transmission: 57% approx.

Anti reflection: Anti-glare treatment

(45÷65 gloss)

4.2 Interface Signals

This color display shall have an analog video interface and shall be capable to operate with multiple horizontal and vertical frequencies. Moreover it shall be capable to support compatible DDC1and DDC2B signals.

4.2.1 Sync Input

Separate, composite TTL compatible

Polarity Positive or negative

4.2.2 Interface Frequency

Table 1:Interface Frequency

Horizontal line frequency (KHZ)±500HZ

31.649 59.94

46.875 75

48.363 60

Vertical frame frequency (HZ) ±3HZ

53.674 85.061

4.2.3 Input Timing Limits

The monitor will accept all timings within the limits of table 2

Table 2: Input Timings Limits

Parameter Horizontal Vertical

Frequency (30 to 54) KHz (50 to 120)Hz

2.5µs

Blanking

Back Porch

Front Porch

Sync Pulse

≧

1.0µs

≧

back Porch

≦

0.7µs

≧

0.4ms

≧

0.1ms

≧

Back Porch

≦

<0.3ms

>0.03ms

4.3 Preset Timing

M454 U-P Default Timing

Table 3

sweep F D C B A

MODE H Pixes

V Lines

d: dot d: display b: backporch p: pulse f: front

VGA60 640

VESA75 800

VESA60 1024

VESA85 800

480

600

768

600

Fd(MHz)

Polar(H/V)

25.175 N/N

49.5 P/P

N/N

56.25 P/P

Fh(KHz)

Fv(Hz)

31.469

59.94

46.875 75

48.363 60

53.674

85.061

Th(us)

Tv(ms)

31.777

16.683

21.333

13.333

20.677

16.667

18.631

11. 7 56

Td(us)

Td(ms)

25.422

15.253

16.162

12.8

15.754

15.88

14.222

11. 179

Tb(us)

Tb(ms)

1.907

1.049

3.232

0.448

2.462

0.6

2.702

0.503

Tp(us)

Tp(ms)

3.813

0.064

1.616

0.064

2.092

0.124

1.138

0.056

Tf(us)

Tf(ms)

0.635

0.317

0.323

0.021

0.369

0.063

0.569

0.018

4.4 Brightness and Contrast

Definitions:

Active area

black to any other color. Its dimensions, in terms of timing correspond to the "active area "times described in table 3

Raster area

Border

Brightness

Contrast

of the displayed images, and shall not have any visible effect on the raster luminance.

Both controls shall not affect the border. Inside this zone the raster shall be always under the minimum perceptible level and no evidence of retracing(images or distortion)shall be visible on the screen at any setting of the luminance controls. The user controls shall operate as described on table 4. This check must be performed under a diffused illumination of 10 lux and on 48k mode (Horizontal frequency).

Table 4

Patterns Setting of user Controls Luminance Limits

This zone can be lighted when the background color is changed from

Under certain conditions (see table 4) this zone must be visible when no video input is applied. Width and height of the raster area must be larger than the corresponding dimensions of the active area.

Comprising any area of the screen outside the raster area.

This control is mainly intended as a raster luminance adjustment.

This control shall vary the gain of the video amplifier, thus adjusting the contrast

Brightness Contrast Raster Area White Area

A Min Any Not Visible *

A Max Min 0.3 ~ 3.0 FL *

B Max Max * 60 FL<=

C Max Max *

B Min Max Not Visible Visible

B Min Min Not Visible Not Visible

Legend:

*Don't Care

A Black screen @0 mV video level.

x 2 ?white box, @700mV video level.

B 2

C Full white screen, 100% of the data area @700mV video level

>29FL

4.5 Power inlet

Power shall be applied to the display device through a standard three wire receptacle NEMA A/5261 or equivalent.

4.6 Power cord

The power cord supplied with the monitor must conform to the International Standards described on part

8.0 and shall have physical and electrical characteristics such that to comply with any other specification item. The power cord shall be of removable type.

4.7 Signal cable

Signals shall be applied to the display device through a shielded cable, which must be intended as part of monitor. This cable shall be of a suitable type in order to comply with any specific item, and shall be terminated in a 15 pin D-Shell male connector type AMP 211350-1 or equivalent, with pin assignment as follows:

15 pin mini D-sub

1 Red video input

2 Green video input

3 Blue video input

4 Identify output

5 Ground

6 Red video ground

7 Green video input

8 Blue video ground

9 Not connected

10 Logic ground

11 Identify output

12 SDA (DDC1 or DDC2B)

13 Horizontal sync.

14 Vertical sync. (VCLK)

15 SCL (DDC2B)

4.8 Internal connectors

All internal connectors for the interconnection of sub assemblies must be distinct in their physical characteristics or polarization so as to prevent any misconnection which may cause permanent damage to the display.

4.9 Power Requirements

The display device shall maintain the specified performances in the range described below:

Frequency: 50/60Hz

Voltage: 90 to 264 Vac RMS

The following consumption requirements shall be met:

Power consumption: 75W for MPRII & VLMF Yoke

70W for NORMAL Yoke

Current consumption: 1.2 Aac RMS

Current and power consumption are the maximum values allowed in the voltage ranges describe

Note:

above.

3Hz

4.9.1 Power Management

Table 5: Power Management

NO STATE STATE POWER SAVING

HORIZONTAL VERTICA VIDEO

1 ON PLUSES PLUSES ACTIVE NONE

STAND-BY NO PLUSES PLUSES BLANKED <15W@90~240VAC

SUSPEND PLUSES NO PLUSES BLANKED <15W@90~240VAC

OFF NO PLUSES NO PLUSES BLANKED <5W@90~240VAC

The states of power saving function shall be display by LED indication.

4.10 Visual Characteristics

All factory preset resolutions must guarantee the right display dimension and centering. Other resolutions can be adjusted correctly with the external controls as per section 2.5. In all resolution must be possible to adjust the monitor in full screen (overscan mode) by external controls. The viewing eye angle while performing any dimensional measurement is parallel to the axis of the picture tube.

4.10.1 Test Conditions

Resolution: any of preset modes

Input level: 700 mV

Pattern: crosshatch after setting full white pattern with

20FL luminance.(Except otherwise indicated)

Brightness control: cutoff position

Contrast control: position after setting full white pattern with 20FL luminance.

Unless otherwise specified, the display shall meet the requirements of this section under any combination of the following operating ranges:

Image duty cycle: 10% to 90%

Input power: As per section 3.1

Operating temperature: As per section 6.2

Humidity: As per section 6.2

Magnetic field: Horizontal=0 Gauss

Vertical=0.4 Gauss

4.10.2 Display Dimensions

The dimensions of the data area for all presetting mode listed in part 2.3.1,measured along the horizontal and vertical axes of the screen, shall be as follows:

Horizontal=260± 2.5mm

Vertical=195± 2mm

The external control ranges of the data area, shall be as follows:

Maximum horizontal size: overscan the screen Minimum horizontal size:

Maximum vertical size: overscan the screen Minimum vertical size: 175.5mm

250mm

≦

4.10.3 Picture Size Variation

The change in display size shall be less than 3mm in width or 2mm in height at full white pattern.(250x188mm

)

Brightness change from 5FL to 25FL

Temperature change in 25°C±10°C

4.10.4 Display Centering

Figure 9. Describes the pattern for this test. Basically a single pixel white line around the perimeter of the data area composes it, with marks for the horizontal ad vertical axes. The background is black. The maximum variation of the display centering shall be such that the following relationship shall be met:

a | L - R | ≦ 2.5mm | U - D | ≦2mm

Figure 9: Display Centering

The external control ranges of display position for all modes listed in part 2.3.1 shall be as follows:

Horizontal position: total control range≧ 40mm

Vertical position: total control range≧ 25mm

4.10.5 Tilt

The maximum variation of the display rotation (tilt) shall be such that the following relationship shall be met:

θ≦0.5 degree

Figure 10: Tilt

4.10.6 Geometric Distortions

1. Pincushion

Pincushion(top) d1≦1.5mm

Pincushion(bottom) d2≦1.5mm

Pincushion(leftside) a1≦1.5mm

Pincushion(rightside) a2≦1.5mm

"S" distortion ≦0.5mm

2. Barrel

barrel(top) c1≦1.5mm

barrel(bottom) c2≦1.5mm

barrel(leftside) b1≦1.0mm

barrel(rightside) b2≦1.0mm

3. Trapezoid & Parallelogram distortion

2.0mm

≦

2.5mm

Figure 11

XXX+

−

4.10.7 Geometric Distortion By Luminance

The test pattern is composed of two white areas and a black area, the three areas are equivalents. The input signal level is 700 mV with brightness control at cut-off and contrast control at maximum(see Figure 12). The distortion introduced by dynamic High Voltage variation, due to different brightness level on the screen, are admitted with following limits:

|AC - BD| or |A'C'-B' D'|≦2.0mm

Figure 12

4.10.8 Linearity

The linearity of an image displayed on the CRT must meet the following requirements, with reference to figure 13 for both X and Y axis. The measured value of linearity shall be less than 6% when calculated using all lattices and shall be less than 4% when calculated using adjacent lattices.

X1 X2 X3 X4 X5 X6 X7 X8

Figure 13:Linearity

minmax

−

minmax

Where: X max and X min are belong to the set Xi,i=1......8

X max, X min, be Calculated Same Line

Y max, Y min, be Calculated Same Row

Y max and Y min are belong to the set Yi,i=1....8

4.10.9 Misconvergence

The display must conform to all the following requirements: Maximum convergence error.

Area Horizental Direction Vert. Direction

Center field of 195mm diameter

0.30mm 0.30mm

Square field of 260 x 195 mm

0.40mm 0.40mm

Table 6 : Misconvergence

The maximum convergence error shall be measured for a white spot or line, and represents the maximum distance between the energy centers of any two primary colors. The central area is defined as the area within a circle centered on the CRT faceplate having a diameter equal to the display vertical dimension.

Figure 14

4.10.10 Image Stability (Jitter)

Not perceivable Jitter will be present on the display, when displaying a cross-hatch pattern, at a distance of 500 mm from the screen. In any case it is not admitted a measured Jitter value greater than one dot (both on X axis or on Y axis).

4.10.11White Color Adjustment

The chromaticity coordinates of the white color shall be verified with standard full white screen @700 mV input level with brightness control at cut-off and contrast control adjusted to 25FL nits of luminance on the center of the screen. The 1931 CIE chromaticity diagram (x, y) coordinates for the screen center shall be:

x = 0.281± 0.030

y = 0.311± 0.030

4.10.12 White Color Uniformity

With a standard full white screen as described in section 4.11, the color coordinates measured at any point of the screen shall be:

x = Xref

y = Yref± 0.030

0.030

4.10.13 White Color Tracking

Contrast Control Tracking Error

After performing the standard setting as described in section 4.11, the contrast control shall be moved within 30FL (max) and 7FL (min) of screen luminance or to the mechanical stop if the lower limit cannot be reached. The white color coordinates in the center of the CRT when displaying the standard pattern at all the allowed setting of the contrast control shall be:

x = Xref

y = Yref

Brightness Control Tracking Error

The initial setting shall be as follows:

Pattern: white raster Input level: 700mV Brightness control: maximum Contrast control: adjust to 100 nit of screen luminance in the center of the CRT

The brightness control shall be moved within 30FL (max) and 7FL (min) of screen luminance or to the mechanical stop if the these limits cannot be reached. The white color coordinates in the center of the CRT at all the allowed settings of the brightness control shall be:

0.035

x = Xref

y = Yref

0.035

4.10.14 Luminance Uniformity

The variation in average display luminance between any area(with dimension approximate 2 cm of diameter)on standard flat white screen, must be less than 35% of the luminance of the brightest area with brightness control at cut-off and contrast control adjusted to 80 nits of luminance on the center of screen.

4.10.15 Focus

When external contrast control is adjusted for 20?1FL light output with a flat white field pattern, then switch to a character pattern filled with "H" characters, the characters shall be readable and distinguishable.

4.10.16Moire

While displaying a white raster, no Moire effect shall be visible at any luminance setting 15FL.

4.10.17 Purity

Conspicuous miss-landing shall not be visible within display area. at distance of 60cm from CRT surface at 20FL white luminance.

4.11 Functional Performance

4.11.1 Acoustical noise:

The acoustical noise shall be less than 50dB when operating in normal condition, mode change or power on/off.

4.11.2 Turn off:

Set unit at 20FL of full white screen, then turn off unit, image should disappear smoothly, no persistent spot and flash.

4.11.3 High voltage discharge:

The arcing due to monitor high voltage discharge shall not cause any damage to devices connected to the monitor.

4.11.4 Tapping test:

No objectionable intermittence or noise occur while tapping top, left right, rear side of enclosure by a rubber hammer.

4.12 Environment Requirements

4.12.1 Non-adjusting operation

25℃ ± 10℃

4.12.2 Operating

Temperature 0°C to +40°C Relative Humidity 10% to 90%

Altitude Sea level to 8,000ft

4.12.3 Storage of shipment

Temperature -20°C to + 60°C Relative Humidity 10% to 90%

Altitude Sea level to 40,000ft

TEST PROCEDURUE:

Put in temperature chamber under 60°C Time: 24 hours

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Back to room temperature Time: 4 hours

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Put in temperature chamber under -20°C Time: 24 hours

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Back to room temperature Time: 4 hours

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The process repeat 2 times.

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4.13 Reliability Requirements

4.13.1 Mean Time Before Failure ( MTBF )

30,000 hours with 90% confidence level.(CRT less)

4.13.2 Reference Document

MIL-STD-105D MIL-HDBK-217E

4.13.3 Electro-Static Discharge ( ESD )

Contact discharge:

Apply 6KV,the set must be auto-recovery Apply 4KV,the display pattern doesn’t appear noise

Air discharge:

Apply 8KV,be disallow components damage or EEPROM data loss Apply 6KV,the display pattern does not appear noise.

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