Sharp LLT1520, LLT1620-E-P Schematic

q

SERVICE MANUAL

CODE : 00ZLLT1620ESE

LCD MONITOR

LL-T1520-E
LL-T1520-P
LL-T1620-E

MODEL

CONTENTS

CHAPTER 1. OUTLINE OF THE PRODUCT, NOMENCLATURE AND FUNCTION . . . 1 – 1

CHAPTER 2. CONNECTION, ADJUSTMENT, OPERATION, AND FUNCTIONS . . . . . 2 – 1

CHAPTER 3. DISASSEMBLY AND ASSEMBLY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 – 1

CHAPTER 4. TROUBLE SHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 – 1

CHAPTER 5. BLOCK DIAGRAM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 – 1

CHAPTER 6. CIRCUIT DIAGRAM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 – 1

CHAPTER 7. PARTS LAYOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 – 1

LL-T1620-P

Product Name Model Name Color

LL-T1520-E LL-T1520-H Gray
LL-T1520-P LL-T1520-B Black
LL-T1620-E LL-T1620-H Gray
LL-T1620-P LL-T1620-B Black

Parts marked with "!" are important for maintaining the safety of the set. Be sure to replace these parts with specified
ones for maintaining the safety and performance of the set.

This document has been published to be used

SHARP CORPORATION

for after sales servic e only.
The contents are subject to change without notice.

PC-UM10M

CHAPTER 1. OUTLINE OF THE PRODUCT, NOMENCLATURE AND FUNCTION

1. SPECIFICATIONS

LL-T1520 LL-T1620

LCD panel Diagonal 38cm Diagonal 40cm

Advanced Super-V and Anti-GlareLow Reflection TFT LCD module
Resolution (max.) XGA, 1,024 x 768 pixel SXGA, 1,280 x 1,024 pixel
Displayable colors (max.) Approx. 16.77 million color (8 bit)
Brightness (max.) 250 cd/m
Dot pitch 0.297(H) x 0.297 (V)mm 0.248(H) x 0.248 (V)mm
Contrast ratio 400 : 1
Angle of visibility Left-right 170°; Up-down 170°
Screen display size Horizontal 304.1 x Vertical 228.1 mm Horizontal 317.4 x Vertical 253.9 mm
Video signal Analog:Analog RGB (0.7 Vp-p) [75Ω]

Digital: DVI standard 1.0 compatible
Sync signal H/V separate Sync (TTL level: +/-), Sync on Green, Composite Sync (TTL level:+/-)
Expansion compensation Digital screening

(Enlargement VGA/SVGA etc. to full screen size. )
Plug & Play VESA DDC1/DDC2B compatible
Power management VESA DPMS, DVI DMPM
Speaker output 1W + 1W
Input signal terminal Mini D-sub 15 pin (3 row), DVI-I 29 pin
Audio input terminal Mini stereo jack
Headphone terminal Mini stereo jack
Screen tilt Upward approx.0° -30°; downward approx.0° - 5°
Screen swivel Approx.90° from left through right
Power supply AC100 - 240V, 50/60Hz
Temperature of

operating environment
Power consumption Maximum 36W (Standby state: 3W) Maximum 42W (Standby state: 3W)
Dimensions 337(W) x 185(D) x 355(H) mm 352(W) x 185(D) x 370(H) mm
Weight Approx. 4.9kg

5 - 35°C

(approx. 3.3kg excluding stand)

2

300 cd/m

Digital screening
(Enlargement VGA/SVGA/XGA etc. to full screen size. )

Approx. 5.3kg
(approx. 3.7kg excluding stand)

2

■

■ DIMENSIONS (Units: mm)

■ ■

337

270

61

LL-T1520

355

238

185

Cable

Analog signal cable: Approx. 2.0m
Audio cable: Approx. 2.0m
Digital signal cable, NL-C01E (purchased separately): Approx. 2.0m
Analog signal cable, NL-C02E (purchased separately): Approx. 2.0m

LL-T1520-H/B LL-T1620-H/B OUTLINE OF THE PRODUCT, NOMENCLATURE AND FUNCTION

1 – 1

370

298

352

LL-T1620

238

64

185

PC-UM10M

Relevant signal timings

Display mode

VESA

US text
Power

Macintosh
series

Sun Ultra
series

640 x 480

800 x 600

1024 x 768

1152 x 864
1280 x 960

1280 x 1024

720 x 400
640 x 480

832 x 624
1024 x 768
1152 x 870

1280 x 1024

1024 x 768

1152 x 900

1280 x 1024

Hsync

31.5kHz

37.9kHz

37.5kHz

35.1kHz

37.9kHz

48.1kHz

46.9kHz

48.4kHz

56.5kHz

60.0kHz

67.5kHz

60.0kHz

64.0kHz

80.0kHz

31.5kHz

35.0kHz

49.7kHz

60.2kHz

68.7kHz

64.0kHz

80.0kHz

48.3kHz

53.6kHz

56.6kHz

61.8kHz

71.7kHz

Vsync

60Hz 25.175MHz
72Hz 31.5MHz
75Hz 31.5MHz
56Hz 36.0MHz
60Hz 40.0MHz
72Hz 50.0MHz
75Hz 49.5MHz
60Hz 65.0MHz
70Hz 75.0MHz
75Hz 78.75MHz
75Hz 108.0MHz
60Hz 108.0MHz
60Hz 108.0MHz
75Hz 135.0MHz
70Hz 28.3MHz

66.7Hz 30.2MHz

74.6Hz 57.3MHz
75Hz 80.0MHz
75Hz 100.0MHz
60Hz 108.0MHz
75Hz 135.0MHz
60Hz 64.13MHz
66Hz 70.4MHz
70Hz 74.25MHz
66Hz 94.88MHz

67.2Hz 117.01MHz

Dot frequency LL-T1520 LL-T1620

ANALOG DIGITAL ANALOG DIGITAL

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--||

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--|-

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|-|-

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--|-

--|-

--|-

--|-

--|-

--|-

--|-

--|-

• Recommended resolution for LL-T1520 is 1024 x 768.

• Recommended resolution for LL-T1620 is 1280 x 1024.

• All are compliant only with non-interlaced.

• The monitor can be connected to the following computers that have a
DVI standard output terminal (DVI-D24 pin or DVI-I29 pin) for digital
connection. (Note that the display may not appear correctly, depend­ing on the connected computer.)

-- LL-T1520: Computers capable of XGA output

-- LL-T1620: Computers capable of SXGA output

• Frequencies for Power Macintosh and the Sun Ultra series are refer­ence values. To connect, another adapter (commercially available)
may be required.

• If the monitor is receiving timing signals that are not compatible, [OUT
OF TIMING] will appear. Follow your computer's instruction manual
to set the timing so that it is compatible with the monitor.

• If the monitor is not receiving any signal (synch signal), [NO SIGNAL]
will appear.

The analog RGB input connector pin

(Mini D-sub connector with 15 pins)

No. Function

1 Red video signal input
2 Green video signal input
3 Blue video signal input
4GND
5GND
6 For red video signal GND
7 For green video signal GND
8 For blue video signal GND

No.

9
10
11
12
13
14
15

Function
DDC/+5V
GND
N.C.
DDC data
For Hsync signal input
For Vsync signal input
DDC clock

LL-T1520-H/B LL-T1620-H/B OUTLINE OF THE PRODUCT, NOMENCLATURE AND FUNCTION

1 – 2

PC-UM10M

The DVI-I input connector pin

(DVI-I connector with 29 pins)

C1 C2

C3 C4 C5

No. Function No. Function

1

TMDS data 2-

2

TMDS data 2+

3

TMDS data 2/4 shield

4

N.C.

5

N.C.

6

DDC clock

7

DDC data

8

Analogue vertically
synchronised signal

9

TMDS data 1-

10

TMDS data 1+

11

TMDS data 1/3 shield

12

N.C.

13

N.C.

14

+5V

15

GND

16

Hot plug detection

17

TMDS data 0-

18

TMDS data 0+

19

TMDS data 0/5 shield

20

N.C.

21

N.C.

22

TMDS clock shield

23

TMDS clock +

24

TMDS clock -

C1

Analogue red image signal

C2

Analogue green image signal

C3

Analogue blue image signal

C4

Analogue horizontally synchro­nised signal

C5

Analogue GND

PRODUCT DESCRIPTION

1. INPUT button: To switch between the signal’s input terminals.
(Analogue RGB input terminal i DVI-I input termi-
nal)

2. MENU button: This button is used to pop-up, select and close the
OSD (On Screen Display) M enu.

3. SELECT button: This button is used to select menu options when
the OSD Menu i s displayed.

4. e d buttons: When the OSD Me nu is displayed:
These buttons are used to increa se or decre ase

the value of a selected option.

Power management

The monitor is based on the VESA DPMS*1 and the DVI DMPM*2 stan­dards.
To activate the monitor's Power Management function, both the video
card and the computer must conform to the VESA DPMS standard and
the DVI DMPM standard.

*1 DPMS: Display Power Managem ent Signalling

DPMS mode Screen

ON

STANDBY
SUSPEND Yes No

OFF No No

*2 DMPM: Digital Monitor Power Management

DPMS mode Screen Power consumption

ON Display on LL-T1520: 36W

OFF Display off LL-T1520: 3W

Display on

Display off

Power

consumption

LL-T1520: 36W
LL-T1620: 42W

LL-T1520: 3W
LL-T1620: 3W

LL-T1620: 42W

H-sync V-sync

Yes Yes

No Yes

LL-T1620: 3W

DDC (Plug & Play)

When the OSD Menu is not displayed:
These buttons are used to adjust backlight bright-

ness and speaker volume.

5. Power button

6. Power LED: This LED is lit green when in use and orange when
in power-saving mode.

7. Speakers Audio entering via the monitor and the external
device connected to the monitor can be heard.

Adjusting the tilt and the swivel of monitor

Lightly holding both sides of the monitor, adjust it to a suitable viewing
angle.

Note: When adjusting the screen tilt and swivel, pressure from hands

on the LCD panel could cause damage.

approx.30˚

approx.5˚

approx.45˚

approx.45˚

This monitor supports the VESA DDC (Display Data Channel) standard.
DDC is a signal standard for carrying out Plug & Play functions on the
monitor or PC. It transfers information such as degree of resolution
between the monitor and PC. You can use this function if your PC is
DDC compliant and if it is set so that it can detect the Plug & Play mon­itor.
There are many varieties of DDC due to the differences between sys­tems. This monitor works with DDC1 and DDC2B.

LL-T1520-H/B LL-T1620-H/B OUTLINE OF THE PRODUCT, NOMENCLATURE AND FUNCTION

1 – 3

PC-UM10M

.

8. DVI-I input terminal: T h e com pu ter’ s d igita l RGB out pu t ter mi nal or a nal ogue RGB
output terminal can be connected here.

• The monitor can be connected to the following computers
that have a DVI standard output terminal (DVI-D24 pin or
DVI-I29 pin) for digital connection. (Note that the display may
not appear correctly, depending on the connected com­puter.)

-- LL-T1520: Computers capable of XGA output

-- LL-T1620: Computers capable of SXGA output

• Separately sold cables are necessary for connection.

To connect to a digital RGB output terminal:

-- Digital signal cabl e (model name: NL-C01E)
To connect to an analog RGB output terminal:

-- Analog signal cable (model name: NL-C02E)

9. Analog RGB input
terminal:

The analog signal cable is connected here.The analog signal
cable included should be used.

10. Audio input terminal: A computer's audio output terminal can be connected here .

The audio cable included should be used.

11. Security lock anchor: By connecting a security lock (commercially available) to the

security lock anchor, the monitor is fixed so that it cannot be
transported.

The security slot works in conjunction with Kensin gton Micro
Saver Security Systems.

12. Power terminal:

13. Headphone terminal: Headphones (commercially avai lable) can be connected here.

14. Main power switch

15. Ventilation openings:

Note: Never block the ventilation open ings as this may l ead to

overheating inside the monitor and result in malfunction.

LL-T1520-H/B LL-T1620-H/B OUTLINE OF THE PRODUCT, NOMENCLATURE AND FUNCTION

1 – 4

PC-UM10M

CHAPTER 2. CONNECTION, ADJUSTMENT, OPERATION, AND FUNCTIONS

1. CONNECTING THE MONITOR AND TURNING THE MONITOR ON AND OFF

Caution: • When connecting, ensure that both the monitor and com-

puter are switched off.

• Be careful not to overly bend the cable or add extension
cords as this could lead to malfunction.

Cable storage

If necessary, excess cable can be housed in the stand.

1. Remove the cover.
Gently pull the top of the cover towards yourself.

CONNECTING THE MONITOR TO A COMPUTER

Connecting using accessory analog signal cable

Connect the accessory analog signal cable to the analog RGB input ter­minal of the display, and the analog RGB output terminal of the com­puter.

Analog RGB input
terminal

2. Run cable along the back of the stand.

3. Refit the cover.
Be careful not to pinch the cable.

Analog signal cable

• Paying attention to connector direction, firmly insert the signal
cable to terminal, and then tighten the screws at both sides.

If connecting to a D-sub 15 pin 2 row Apple P ower Macintosh, attach a
Macintosh conversion adapter (commercially available) to the analog
signal cable.

Macintosh conversion adapter

Analog RGB output terminal

Connecting using a separately sold display cable

The separately sold display cable enables connection between the DVI­I input terminal on the display and the digital or analog RGB output ter­minal of the computer.

When connecting to a digital RGB output terminal:

• Use a digital signal cable (model name: NL-C01E)

• The monitor can be connected to the following computers that have a
DVI standard output terminal (DVI-D24 pin or DVI-I29 pin) for digital
connection. (Note that the display may not appear correctly, depend­ing on the connected computer.)

-- LL-T1520: Computers capable of XGA output

-- LL-T1620: Computers capable of SXGA output

When connecting to an analog RGB output terminal:

• Use an analog signal cable (model name: NL-C02E).

• If the cover is hard to refit, do not force it.
Check whether cables are trapped.

LL-T1520-H/B LL-T1620-H/B CONNECTION, ADJUSTMENT, OPERATION, AND FUNCTIONS

2 – 1

DVI-I input terminal

Display cable
(to be purchased separately)

RGB output terminal

PC-UM10M

• Paying attention to connector direction, firmly insert the signal
cable to terminal, and then tighten the screws at both sides.

Set the monitor as follows when establishing a digital connection with a
Power Mac using an ADC-DVI adapter made by Belkin. (Operation has
been checked with the Power Mac G4 M7627J/A)

• Perform settings with the Power Mac power supply off.

• The setup screen automatically disappears approximately 30 sec­onds after the last command.

1. After connecting the power cord, turn on the monitor’s main power.

2. Press the e button and d button simultaneously, and while doing
this press the POWER button (i.e. turn the power on).

MAC DIGITAL

INPUT-2

OFF

ON

OK [ MENU ]

3. Set to “ON” with the e d buttons.

• Do not set to [ON] if you are not using a Belkin ADC-DVI adapter, as
this may result in incorrect display.

4. Press the MENU button.
This completes setting.

CONNECT THE ACCESSORY AUDIO CABLE

When the accessory audio cable is connected to the audio output termi­nal of the computer, the sound of the connected computer is output
from the display speakers. You can also use the headphone jack of the
display.

CONNECTING THE MONITOR TO A POWER SOURCE

Power terminal

AC outlet

Power cord

TURNING THE POWER ON

1. Turn on the main power of the monitor.

Main power switch

Audio input
terminal

Audio cable

Audio output terminal

• If you plan to use a commercially available cable, obtain one with no
resistance.

CONNECTION OF HEADPHONES
(COMMERCIALLY AVAILABLE)

Headphones (commercially available) can be connected.

Headphone
terminal

Headphones

• When switching the main power switch on and off, always wait
for an interval of at least 5 seconds. Rapid switching may result
in malfunction.

2. Press the monitor’s POWER button.
The power LED will light up orange.

3. Turn on the computer.

Turn on the computer

Press power button

power supply.

When a signal is input from the computer, the power LED lights up
green, and the screen is displayed (After power is turned on, it may
take a little time until the screen is displayed.)

• If the input terminal to which the computer is connected has not
been selected, the screen will not be displayed. If necessary,
perform input terminal switching.

Notes: (when using an analog signal)

• If using the monito r for the first time or after having changed the sys­tem settings during use, perform an automatic screen adjustment.

Note: When the headphones are co nnected, no sound can be heard

from the monitor speakers.

LL-T1520-H/B LL-T1620-H/B CONNECTION, ADJUSTMENT, OPERATION, AND FUNCTIONS

• When connecting to a notebook, if the notebook computer’s screen is
set so that it is displaying at the same time, the MS-DOS screen may
not be able to display properly. In this case, change the settings so
that only the monitor is displaying.

2 – 2

PC-UM10M

CHANGING BETWEEN INPUT TERMINALS

Use the INPUT button to switch between signal input terminals.

Analog RGB input terminal

INPUT-1

<ANALOG>

DVI-I input terminal

(digital)

INPUT-2

<DIGITAL>

INPUT

DVI-I input terminal

(analog)

INPUT-2

<ANALOG>

TURNING THE POWER OFF

1. Turn the computer off.

2. Press the monitor’s POWER button.
The Power LED will disappear.

Turn on the
computer off

If the monitor will not be used for a long time, turn off the main power
switch of the monitor, and remove the power plug from the outlet.

2. INSTRUCTIONS FOR ATTACHING A VESA COMPLIANT ARM

An arm or stand based on the VESA standard (comme rcially available)
can be attached to the monitor.

Procurement of the arm or stand is at the customer’s discretion.

Arms or stands able to be used

Attachments must satisfy the following.

• Compatible with the VESA standard

• Ha ve a gap of 75 mm x 75 mm between the screw holes on the sec­tion to be attached

• Not be likely to fall off or break off after being attached to the monitor.

Notes: • The stand is specially made for use with this monitor. Once

having removed the stand, never attempt to attach it to
another device.

• Once having removed the screws, store them together with
the stand and if the stand is ever re-attached be sure to use
the original screws. Using different screws could lead to a
malfunction.

6. Attach the arm to the monitor with the four screws.

Press power button

How to attach the arm or stand

• Be careful not to overly bend the cable or add extension cords as this
could lead to malfunction.

• While following these instructions, please also refer to the installation
instructions in the operation manual included with the arm or stand.

1. Turn off the monitor’s power and unplug AC plug from AC outlet.

2. Remove the cable.

3. Spread out a soft cloth on a suitable horizontal surface.

4. Being careful not to damage the monitor, gently lay the monitor on it
display-side down.

5 Remove the four screws and then remove the stand from the moni-

tor.

Note: The screws used to attach the arm should be M4 screws with a

length of 6 mm ~ 8 mm protruding from the surface to be
attached. Using different screws could lead to malfunction or may
lead to the monitor falling off, internal damaged, personal injury.

6 ~ 8 mm

Screw used to attach arm
Arm

Part of monitor to which
arm is attached

LL-T1520-H/B LL-T1620-H/B CONNECTION, ADJUSTMENT, OPERATION, AND FUNCTIONS

2 – 3

3. ADJUSTMENT

3-1. ADJUSTMENT METHOD

1) Resetting all adjustment values

+

MENU

Press the above two buttons at same time, and while turn the power on.

2) ADJUSTMENT menu reset

MENU

3) Adjustment lock function

MENU

While pressing the MENU button, turn the power on.

4) Adjusting the Backlight or Volume

5) Screen adjustment

MENU

ADJUSTMENT AUTO

(for ANALOG)

GAIN

MENU

CONTROL
(For ANALOG)

COLOR

MENU

CONTROL

MENU

MODE SELECT

SELECT

+

Power ON

Power ON

Press the two buttons at same time.

OSD H-POSITION

BRIGHT

SELECT

SELECT
SELECT
SELECT
SELECT

SELECT
SELECT

SELECT

SELECT

SELECT

buttons

VOLUME

CLOCK
PHASE
H-POS
V-POS

AUTO
BLACK LEVEL

buttons

buttons
buttons
buttons
buttons

buttons
buttons

CONTRAST

COLOR MODE (sRGB, STD, VIVID)

buttons

WHITE BALANCE WHITE BALANCE

COOL STD

HUE

SATURATION

buttons

buttons

buttons

WARM USER

SELECT
SELECT
SELECT

R-CONTRAST
G-CONTRAST
B-CONTRAST

PC-UM10M

buttons

buttons
buttons
buttons

SELECT

SELECT

MENU

SELECT

SELECT

END

6) Version display (for service)

Power ON

MENU

Display the software version.
With the version displayed, no button operations are valid.

< VERSION & CHECK SUM >

VERSION : 1.04 (20020411)
CHECK SUM : OK A02D

HS

OSD V-POSITION
SCALING
400 LINES

LANGUAGE

buttons

buttons

buttons

button

SELECT

(English, German, French, Dutch,
Spanish, Italian, Swedish, Japanese)

7) Test 1 (for service)
DIAG TOOL MENU

AGING TEST 1
AGING TEST 1

SET••• [MENU]

SELECT

Power ON

SELECT

Blue

H

H

White H Black

MENU

3

Green H Red H Dark blue H Dark green H Dark red

8) Test 2 (for service)

H

Green

H

Red
Flicker pattern

Blue

H

Checker pattern

When the test is terminate, Power off

H

MENU

White

H

H

Black

H

Gray scale

LL-T1520-H/B LL-T1620-H/B CONNECTION, ADJUSTMENT, OPERATION, AND FUNCTIONS

2 – 4

3. ADJUSTMENT

3-1. ADJUSTMENT METHOD

1) Resetting all adjustment values

+

MENU

Press the above two buttons at same time, and while turn the power on.

2) ADJUSTMENT menu reset

MENU

3) Adjustment lock function

MENU

While pressing the MENU button, turn the power on.

4) Adjusting the Backlight or Volume

5) Screen adjustment

MENU

ADJUSTMENT AUTO

(for ANALOG)

GAIN

MENU

CONTROL
(For ANALOG)

COLOR

MENU

CONTROL

MENU

MODE SELECT

SELECT

+

Power ON

Power ON

Press the two buttons at same time.

OSD H-POSITION

BRIGHT

SELECT

SELECT
SELECT
SELECT
SELECT

SELECT
SELECT

SELECT

SELECT

SELECT

buttons

VOLUME

CLOCK
PHASE
H-POS
V-POS

AUTO
BLACK LEVEL

buttons

buttons
buttons
buttons
buttons

buttons
buttons

CONTRAST

COLOR MODE (sRGB, STD, VIVID)

buttons

WHITE BALANCE WHITE BALANCE

COOL STD

HUE

SATURATION

buttons

buttons

buttons

WARM USER

SELECT
SELECT
SELECT

R-CONTRAST
G-CONTRAST
B-CONTRAST

PC-UM10M

buttons

buttons
buttons
buttons

SELECT

SELECT

MENU

SELECT

SELECT

END

6) Version display (for service)
Power ON

MENU

Display the software version.
With the version displayed, no button operations are valid.

< VERSION & CHECK SUM >

VERSION : 1.04 (20020411)
CHECK SUM : OK A02D

HS

OSD V-POSITION
SCALING
400 LINES

LANGUAGE

buttons

buttons

buttons

button

SELECT

(English, German, French, Dutch,
Spanish, Italian, Swedish, Japanese)

7) Test 1 (for service)
DIAG TOOL MENU

AGING TEST 1
AGING TEST 1

SET••• [MENU]

SELECT

Power ON

SELECT

Blue

H

H

White H Black

MENU

3

Green H Red H Dark blue H Dark green H Dark red

8) Test 2 (for service)

H

Green

H

Red
Flicker pattern

Blue

H

Checker pattern

When the test is terminate, Power off

H

MENU

White

H

H

Black

H

Gray scale

LL-T1520-H/B LL-T1620-H/B CONNECTION, ADJUSTMENT, OPERATION, AND FUNCTIONS

2 – 4