Sharp Ll-t1520-e User manual

qSERVICE MANUAL

CONTENTS

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.

SHARP CORPORATION This document has been published to be used

for after sales service only.

The contents are subject to change withoutnotice.

CODE : 00ZLLT1620ESE

LCD MONITOR

LL-T1520-E

LL-T1520-P

LL-T1620-E

MODEL 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

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

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CHAPTER 1. OUTLINE OF THE PRODUCT, NOMENCLATURE AND FUNCTION

1. SPECIFICATIONS

■

■■

■ DIMENSIONS (Units: mm)

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 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/m2300 cd/m2

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. ) Digital screening

(Enlargement VGA/SVGA/XGA 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 5 - 35°C

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

(approx. 3.3kg excluding stand) Approx. 5.3kg

(approx. 3.7kg excluding stand)

352

185

370 298

238

LL-T1620

337

185

355 270

238

LL-T1520

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Relevant signal timings

• 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, depend-

ing 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 refer-

ence 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

Display mode Hsync

Vsync

Dot frequency LL-T1520 LL-T1620

ANALOG DIGITAL ANALOG DIGITAL

VESA

640 x 480

31.5kHz

60Hz 25.175MHz

||||

37.9kHz

72Hz 31.5MHz

||||

37.5kHz

75Hz 31.5MHz

||||

800 x 600

35.1kHz

56Hz 36.0MHz

|-|-

37.9kHz

60Hz 40.0MHz

||||

48.1kHz

72Hz 50.0MHz

||||

46.9kHz

75Hz 49.5MHz

||||

1024 x 768

48.4kHz

60Hz 65.0MHz

||||

56.5kHz

70Hz 75.0MHz

||||

60.0kHz

75Hz 78.75MHz

||||

1152 x 864

67.5kHz

75Hz 108.0MHz

--||

1280 x 960

60.0kHz

60Hz 108.0MHz

--||

1280 x 1024

64.0kHz

60Hz 108.0MHz

--||

80.0kHz

75Hz 135.0MHz

--|-

US text

720 x 400

31.5kHz

70Hz 28.3MHz

||||

Power

Macintosh

series

640 x 480

35.0kHz

66.7Hz 30.2MHz

|-|-

832 x 624

49.7kHz

74.6Hz 57.3MHz

|-|-

1024 x 768

60.2kHz

75Hz 80.0MHz

|-|-

1152 x 870

68.7kHz

75Hz 100.0MHz

--|-

1280 x 1024

64.0kHz

60Hz 108.0MHz

--|-

80.0kHz

75Hz 135.0MHz

--|-

Sun Ultra

series

1024 x 768

48.3kHz

60Hz 64.13MHz

--|-

53.6kHz

66Hz 70.4MHz

--|-

56.6kHz

70Hz 74.25MHz

--|-

1152 x 900

61.8kHz

66Hz 94.88MHz

--|-

1280 x 1024

71.7kHz

67.2Hz 117.01MHz

--|-

No. Function

No.

Function

1 Red video signal input

DDC/+5V

2 Green video signal input

GND

3 Blue video signal input

N.C.

4GND

DDC data

5GND

For Hsync signal input

6 For red video signal GND

For Vsync signal input

7 For green video signal GND

DDC clock

8 For blue video signal GND

(Mini D-sub connector with 15 pins)

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The DVI-I input connector pin

Power management

The monitor is based on the VESA DPMS*1and the DVI DMPM*2stan-

dards.

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 Management Signalling

*2 DMPM: Digital Monitor Power Management

DDC (Plug & Play)

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 mon-

itor.

There are many varieties of DDC due to the differences between sys-

tems. This monitor works with DDC1 and DDC2B.

PRODUCT DESCRIPTION

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.

No. Function No. Function

TMDS data 2-

Hot plug detection

TMDS data 2+

TMDS data 0-

TMDS data 2/4 shield

TMDS data 0+

N.C.

TMDS data 0/5 shield

N.C.

DDC clock

N.C.

DDC data

TMDS clock shield

Analogue vertically

synchronised signal

TMDS clock +

TMDS data 1-

TMDS clock -

TMDS data 1+

Analogue red image signal

TMDS data 1/3 shield

Analogue green image signal

N.C.

Analogue blue image signal

N.C.

Analogue horizontally synchro-

nised signal

+5V

Analogue GND

GND

DPMS mode Screen Power

consumption H-sync V-sync

Display on

LL-T1520: 36W

LL-T1620: 42W Yes Yes

STANDBY

Display off

LL-T1520: 3W

LL-T1620: 3W

No Yes

SUSPEND Yes No

OFF No No

DPMS mode Screen Power consumption

ON Display on LL-T1520: 36W

LL-T1620: 42W

OFF Display off LL-T1520: 3W

LL-T1620: 3W

C1 C2

C3 C4 C5

(DVI-I connector with 29 pins)

1. INPUT button: To switch between the signal’s input terminals.

(Analogue RGB input terminal iDVI-I input termi-

nal)

2. MENU button: This button is used to pop-up, select and close the

OSD (On Screen Display) Menu.

3. SELECT button: This button is used to select menu options when

the OSD Menu is displayed.

4. e d buttons: When the OSD Menu is displayed:

These buttons are used to increase or decrease

the value of a selected option.

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.

approx.30˚

approx.45˚

approx.5˚

approx.45˚

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8. DVI-I input terminal: The computer’s digital RGB output terminal or analogue 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 com-

puter.)

-- 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 cable (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 Kensington Micro

Saver Security Systems.

12. Power terminal:

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

14. Main power switch

15. Ventilation openings:

Note: Never block the ventilation openings as this may lead to

overheating inside the monitor and result in malfunction.

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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.

2. Run cable along the back of the stand.

3. Refit the cover.

Be careful not to pinch the cable.

• If the cover is hard to refit, do not force it.

Check whether cables are trapped.

CONNECTING THE MONITOR TO A COMPUTER

Connecting using accessory analog signal cable

Connect the accessory analog signal cable to the analog RGB input ter-

minal of the display, and the analog RGB output terminal of the com-

puter.

• 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 Power Macintosh, attach a

Macintosh conversion adapter (commercially available) to the analog

signal cable.

Connecting using a separately sold display cable

The separately sold display cable enables connection between the DVI-

I input terminal on the display and the digital or analog RGB output ter-

minal 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, depend-

ing 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).

Analog signal cable

Analog RGB input

terminal

Analog RGB output terminal

Macintosh conversion adapter

DVI-I input terminal

RGB output terminal

Display cable

(to be purchased separately)

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• 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 sec-

onds after the last command.

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

2. Press the ebutton and dbutton simultaneously, and while doing

this press the POWER button (i.e. turn the power on).

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 termi-

nal 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.

• 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.

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

from the monitor speakers.

CONNECTING THE MONITOR TO A POWER SOURCE

TURNING THE POWER ON

1. Turn on the main power of the monitor.

• 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.

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 monitor for the first time or after having changed the sys-

tem settings during use, perform an automatic screen adjustment.

• 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.

MAC DIGITAL

INPUT-2

OK [ MENU ]

OFF

Audio cable Audio output terminal

Audio input

terminal

Headphones

Headphone

terminal

Power cord

AC outlet

Power terminal

Main power switch

Turn on the computer

power supply.

Press power button

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CHANGING BETWEEN INPUT TERMINALS

Use the INPUT button to switch between signal input terminals.

TURNING THE POWER OFF

1. Turn the computer off.

2. Press the monitor’s POWER button.

The Power LED will disappear.

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 (commercially 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

• Have a gap of 75 mm x 75 mm between the screw holes on the sec-

tion to be attached

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

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.

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.

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.

INPUT-1

INPUT

INPUT-2

INPUT-2

Analog RGB input terminal

DVI-I input terminal

(digital) DVI-I input terminal

(analog)

Press power button

Turn on the

computer off

6 ~ 8 mm

Screw used to attach arm

Arm

Part of monitor to which

arm is attached

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3. ADJUSTMENT

3-1. ADJUSTMENT METHOD

6) Version display (for service)

Power ON

Display the software version.

With the version displayed, no button operations are valid.

7) Test 1 (for service)

Power ON

Blue

Green

Red

Dark blue

Dark green

Dark red

White

Black

8) Test 2 (for service)

Red

Green

Blue

White

Black

Flicker pattern

Checker pattern

Gray scale

When the test is terminate, Power off

4) Adjusting the Backlight or Volume

1) Resetting all adjustment values

Power ON

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

2) ADJUSTMENT menu reset Press the two buttons at same time.

3) Adjustment lock function

While pressing the MENU button, turn the power on.

5) Screen adjustment

MENU ADJUSTMENT AUTO

SELECT CLOCK

SELECT PHASE

SELECT H-POS

SELECT V-POS

SELECT

HUE

SELECT

SATURATION

MENU GAIN

CONTROL

(For ANALOG)

AUTO

SELECT BLACK LEVEL

SELECT CONTRAST

COLOR

CONTROL

COLOR MODE (sRGB, STD, VIVID)

COOL STD

WHITE BALANCE WHITE BALANCE

WARM USER

SELECT R-CONTRAST

SELECT

G-CONTRAST

B-CONTRAST

MENU MODE SELECT

400 LINES

SCALING

SELECT

(for ANALOG) buttons

buttons

END

SELECT VOLUME

BRIGHT

buttons

OSD V-POSITION

SELECT

buttons

OSD H-POSITION buttons

buttons

SELECT LANGUAGE (English, German, French, Dutch,

Spanish, Italian, Swedish, Japanese)

button SELECT

< VERSION & CHECK SUM >

VERSION : 1.04 (20020411)

CHECK SUM : OK A02D

MENU DIAG TOOL MENU

AGING TEST 1

SET••• [MENU]

SELECT

SELECT MENU

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3. ADJUSTMENT

3-1. ADJUSTMENT METHOD

6) Version display (for service)

Power ON

Display the software version.

With the version displayed, no button operations are valid.

7) Test 1 (for service)

Power ON

Blue

Green

Red

Dark blue

Dark green

Dark red

White

Black

8) Test 2 (for service)

Red

Green

Blue

White

Black

Flicker pattern

Checker pattern

Gray scale

When the test is terminate, Power off

4) Adjusting the Backlight or Volume

1) Resetting all adjustment values

Power ON

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

2) ADJUSTMENT menu reset Press the two buttons at same time.

3) Adjustment lock function

While pressing the MENU button, turn the power on.

5) Screen adjustment

MENU ADJUSTMENT AUTO

SELECT CLOCK

SELECT PHASE

SELECT H-POS

SELECT V-POS

SELECT

HUE

SELECT

SATURATION

MENU GAIN

CONTROL

(For ANALOG)

AUTO

SELECT BLACK LEVEL

SELECT CONTRAST

COLOR

CONTROL

COLOR MODE (sRGB, STD, VIVID)

COOL STD

WHITE BALANCE WHITE BALANCE

WARM USER

SELECT R-CONTRAST

SELECT

G-CONTRAST

B-CONTRAST

MENU MODE SELECT

400 LINES

SCALING

SELECT

(for ANALOG) buttons

buttons

END

SELECT VOLUME

BRIGHT

buttons

OSD V-POSITION

SELECT

buttons

OSD H-POSITION buttons

buttons

SELECT LANGUAGE (English, German, French, Dutch,

Spanish, Italian, Swedish, Japanese)

button SELECT

< VERSION & CHECK SUM >

VERSION : 1.04 (20020411)

CHECK SUM : OK A02D

MENU DIAG TOOL MENU

AGING TEST 1

SET••• [MENU]

SELECT

SELECT MENU

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LL-T1520-H/B LL-T1620-H/B DISASSEMBLY AND ASSEMBLY

3 – 1

CHAPTER 3. DISASSEMBLY AND ASSEMBLY

[Note for works]

For disassembly and assembly procedures of the parts which are not

described in this section, refer to the Parts Guide.

For assembly, reverse the disassembly procedures.

Use an earth band for disassembly and assembly works.

*DISASSEMBLY FLOW CHART

1. Separation of the display section and the stand section

1. Remove four screws 1and separate the stand section 2and

the display section 3.

2. Display cover disassembly

1. Remove seven screws 1, and remove the display cover 2.

2-1. Power PWB, Sound PWB, Main PWB disassembly

1. Remove the P/S SW cover 1and the HH jack cover 2.

2. Remove eight screws 3, and remove the shield plate 4.

3. Remove the connector 5and four screws 6, and remove the

power PWB 7.

4. Remove the connector 8and two screws 9, and remove the

sound PWB F.

5. Remove the connector G(LL-T1520(7 positions) LL-T1620(six

positions)) and seven screws H.

6. Remove four hex screws I, and remove the main PWB K

from the connector angle J.

[Note for assembly]

When assembling the P/S SW cover 1and the HH jack cover 2, be

sure to engage the pawls securely.

When connecting connector A to the main PWB, place the connector

A with the character surface upward.

1. Separation of the display

section and the stand sec-

tion 33. Separation of stand base

section from stand arm

section disassembly

2. Display cover disassembly 3-1. Stand arm section disas-

sembly

2-1. Power PWB, Sound PWB,

Main PWB disassembly 3-2. Hinge section disassembly

2-2. Separation of the LCD sec-

tion and the display mask

section

3-3. Stand base section disas-

sembly

2-3. Inverter PWB and LCD unit

disassembly

2-4. Key PWB disassembly

LL-T1520H/B

457

810

12 13

11 11

LL-T1620H/B

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3 – 2

2-2. Separation of the LCD section and the display mask

section

1. Remove three screws 1, and separate the LCD section 2

from the display mask section 3.

2-3-1. Inverter PWB and LCD unit disassembly

(LL-T1520H/B)

1. Remove three screws 1and two screws 2, and remove the

LCD base angle 3.

2. Remove two connector disconnection prevention sheets 4,

and remove the connector 5at 5 positions.

3. Remove four screws 6, and remove the inverter PWB 7.

4. Remove two screws 8, and remove the LCD angle 9.

5. Remove the connector Fat two positions from the LCD unit G.

2-3-2. Inverter PWB and LCD unit disassembly

(LL-T1620H/B)

1. Remove three screws 1and two screws 2, and remove the

LCD base angle 3.

2. Remove two connector disconnection prevention sheets 4,

and remove the connector 5at 5 positions.

3. Remove four screws 6, and remove the inverter PWB 7.

4. Remove two screws 8, and remove the LCD angle 9.

5. Remove the connector Ffrom the LCD unit G

2-4. Key PWB disassembly

1. Remove four screws 1, and remove the Speaker unit 2.

2. Remove nine screws 3, and remove the Key SW angle 4.

3. Remove the connector 6from the key PWB 5.

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3. Separation of stand base section from stand arm section

disassembly

1. Remove four screws 1, and separate the stand base section

2from the stand arm section 3.

3-1. Stand arm section disassembly

1. Remove the cable cover 1.

2. Remove four screws 2, and remove the base arm cover B 3.

3. Remove the base arm cover F 4.

4. Remove three screws 5and three washers 6, and remove the

base arm install angle 7.

5. Remove two screws 8and two washers 9, and remove the

hinge section F.

3-2. Hinge section disassembly

1. Remove screw 1, and remove the Hinge cover C 2.

2. Remove screw 3, and remove the Hinge cover B 4.

3. Remove the screw 5, and remove the Hinge cover A 6 from

the hinge unit 7.

3-3. Stand base section disassembly

1. Remove five rubber seat 1.

2. Remove seven screws 2, and remove the stand base plate A

3. Remove the stand base plate B 4from the stand cover 5.

PC-UM10M

LL-T1520-H/B LL-T1620-H/B TROUBLE SHOOTING

4 – 1

CHAPTER 4. TROUBLE SHOOTING

First of all, check to confirm that all the accessory cables below are

properly connected.

Also check to confirm that the PC's video mode is set to match the sig-

nal timing supported by this machine.

*Accessory cables

• Exclusive-use AC cable

• Exclusive-use analog signal cable (RGB cable)

• Exclusive-use digital signal cable (DVI-D cable)

The display does not work (with analog signal input, RGB cable)

(Yes)

When the power button is pressed, does the

LED turn green ?

Is the input signal port connected to the analog

signal cable ?

Is the level of IC13-85P changed by turning

ON/OFF the power button ?

Press the INPUT key to select the suitable

input signal port.

(Yes)

(No)

(Yes)

(No)

(Yes)

(No)

(Yes)

(No)

(Yes)

(No)

(Yes)

(No)

Perform 1

Is the display normal in each video mode ?

Does B/L light up ?

No abnormality

Check the AC cable connection.

Check the power unit switch.

Check IP3 and IC24 peripheral circuit.

Check IP2 and IC25 peripheral circuits.

Check IC10 and IC20 peripheral circuits.

Check X1 and peripheral circuits.

Check IC23 and peripheral circuits.

Check IC30 peripheral circuits.

Check XPON signal and CN7 peripheral

circuits.

Check EDSDA signal, EDSCL signal, IC13

and IC21 peripheral circuits.

Check the analog signal cable and CN2

peripheral circuits and IC5 peripheral circuits.

Check the power unit and the power cable.

Is the power unit switch ON ?

Is the AC cable connected to the power unit ?

Is DC+12V supplied to CN16-1P ?

Is IP2 at DC+5V ? (LL-T1520H/B only)

Is FB30 at DC+3.3V ?

Is RESET signal delivered from IC23 ?

Is X1 oscillating ?

Are FB20 and FB29 at DC+2.5V ?

Is IP3 at DC+5V ? (LL-T1620H/B only)

(Yes)

(No)

(Yes)

(No)

Check Q6 Q7, and peripheral circuits.

Check IC13 and IC17 peripheral circuits.

Are the addresses and data signal of IC13 and

IC17 correct ?

Check the SW PWB , the SW cable, and their

connection.

Are signals of R112 and R113 normal ?

Is the signal at IC13 39 40pin normal ?

Are signals of R19 and R71 normal ?

Perform 2

Perform 3

PC-UM10M

LL-T1520-H/B LL-T1620-H/B TROUBLE SHOOTING

4 – 2

(No)

(Yes)

(No)

(Yes)

Check the power unit, the power cable, their

connection, the DC+12V power line, and IP1.

Is CN10-6P at DC+1.0V or below when the

brightness is maximum ?

Is the inverter PWB normal ?

Check the lamp in the LCD module.

Replace the inverter PWB unit.

(No)

(Yes)

(No)Is FB23 at DC+12V ?

Is CN10-5P at H level (DC+3.3V) ?

Check IC16 peripheral circuits.

Check BLON signal and CN10 peripheral

circuits.

(No)

(Yes)

(No)

(Yes) Check the analog signal cable, CN2

peripheral, and IC peripheral circuits.

Is CN12-1P at DC+12V ? (LL-T1620H/B only) Check IP4 and IC25 peripheral circuits.

(Yes)

(No)Is CN9-39P at DC+5V ? (LL-T1520H/B only) Check IP2 and IC25 peripheral circuits.

(No)Are signals at IC13-17, 24, 40P normal ?

Are signals at R19 and R71 normal ?

Check CN2, IC5, and IC13 peripheral circuits.

(Yes)

(No)Is the signal between IC13 and CN9,C11 normal ?

(LL-T1520H/B only) Check IC13, CN9, and 11 peripheral circuits.

(Yes)

(No)

Is the signal between IC13 and IC27 normal ?

(LL-T1620H/B only) Check IC13 and IC27 peripheral circuits.

(Yes)

(No)

Is the signal between IC27 and CN12 normal ?

(LL-T1620H/B only) Check IC27 and CN12K peripheral circuits.

(Yes)

(No)Are the cables of the LCD unit normal ? Check the cables and related parts.

(Yes)

Replace the LCD unit.

PC-UM10M

LL-T1520-H/B LL-T1620-H/B BLOCK DIAGRM

5 – 1

KEY board

LEDKey

CCFT

BUFF

RGB

REG

+5V

3.3V

2.5V

I2C

3.3V

Selector

USB

USB AC100~220V

LCD 5V

USB 5V

Back Light Unit

CCFT

Address

RGB

H/V

HSBC only

T1620 only

T1520 only

HSBC Common

RGB

H/V

DDC

DVI-I

DDC

Graphic

Engine

Sage

(S9330-100)

(T1620 S9330-135)

H/V H/V

RGB

EEPROM

(Analog

DDC) +5V

Selector

EEPROM

(Digital

DDC) +5V

EEPROM

(Analog

DDC) +5V

Main

Board

AUDIO

IN AUDIO

AMP

+12V

USB 5V

REG

LCD 12V

ROM8Mbit

(Flash)

HVC

373

EEPROM

(USER) 3.3V

Display Data

2.5V

3.3V

Power

supply

unit

(NEW)

SPEAKER OUT

HEAD PHONE

Inverter

unit

T1620

LCD-U

T1520/HSBC

LCD-U

LVDS

Back Light UnitBack Light Unit

TFT LCD Unit

(16"S XGA)

TFT LCD Unit

(16"S XGA)

REG

Back Light Unit

TFT LCD Unit

(15" XGA)

TFT LCD Unit

(15" XGA)

CHAPTER 5. BLOCK DIAGRM

PC-UM10M

LL-T1520-H/B LL-T1620-H/B CIRCUIT DIAGRAM

6 – 1

87654321

12345678

(1) MAIN PWB

1/6

ANALOG I/F

INPUT2

INPUT1

INPUT2 (DVI)

INPUT1 (RGB)

A SEL

(3216)

ABIN2

AGIN2

ARIN2

AGREEN- 5

ARED+ 5

ABLUE- 5

ABLUE+ 5

AGREEN+ 5

ARED- 5

AVSYNC 5

AVIN2

AHIN2

A SEL 5

AHSYNC 5

SDA 3

SCL 3

VPEN5

4,5

TXD 4,5

VPEN5 5

LEDR1 5LEDR5

3.3V

DDC5V

A2.5V

DDC5V

3.3V

R57

10K

D15

R73

560

TP215

R51

C59

0.1u

R79

10k

TP9

TP6

TP218

IC7

SN74LV4053A

2Y1

2Y0

3Y1

3-COM

3Y0

INH

GND

VCC

2-COM

1-COM

1Y1

1Y0

CN2

CON 15P DISPIN

RIN

GIN

BIN

GND

DETECT

GND

RGSA

GHS

GVSI

RGSL

R103

3.9k

TP11

R105

TP175

R75

C27

1u (2125)

C10

0.1u

R91

10k

TP216

TP156

C33

1u (2125)

R38

IC5

BA7657F

12 13

RIN1

HDET

GIN1

GND

BIN1

GND

RIN2

GND

GIN2

GND

BIN2

VIN1 VIN2

VOUT

BOUT

CTL

CSOUT

CV_IN

GOUT

VCC

ROUT

HOUT

HIN2

HIN1

TP224

TP10

R50

100

IC11F

74LVC14

13 12

R92

100k

TP157

R52

R43

IC11C

74LVC14

5 6

R104

7.5k

R125

R31

C61

10u

R81

TP217

TP227

TP180

R41

IC11B

74LVC14

3 4

IC11D

74LVC14

9 8

TP177

TP160

R42

R72

4.7k

IC11E

74LVC14

11 10

TP174

R67

100

RB715F

1 2

TP219

R80

TP12

TP225

TP178

R93

200

R19

R37

R30

100

C7 0.01u(B)

R29

TP176

TP181

R71

C29 0.01u(B)

C9 0.01u(B)

TP151

TP221 TP13

R56

C16

1u (2125)

C34 10uB(3216)

C36 10uB(3216)

R77

10k

TP179

C35 0.01u(B)

C164

0.1u

TP183

C2412 2

1 3

R39

TP154

TP211

R69

TP222

C8 10uB(3216)

C60

0.1u

R21

10K

TP226

R17

R20

10K

C148

0.1u

C6 10uB(3216)

TP182

R54

TP185

R47

10K

R78

10k

TP228

DTC114EUA

R76

10k

TP155

TP4

TP184

D18

C68

2.2u

C70

0.1u

R134

IC11A

74LVC14

1 2

IC18

74LVC157A

8 9

SELECT

GND 3Y

XST

VCC

C63

39p

R33

TP213

IC6

BR24C21

8NC

GNDSDA

SCL

VCLK

VCC

TP223

TP5

C15

22p

C21

0.1u

R106

C5 0.01u(B)

C26

22p

C2412

1 3

47u/16V

C62

39p

DTC114EUA

3 2

TP214

R94

200 R109

D17

C22 0.01u(B)

C4 10uB(3216)

D14

C32

22p

TP220

TP173

C28 10uB(3216)

RXD

180k 180k

[CTL]

H : IN1

L : IN2

XVPEN

CHAPTER 6. CIRCUIT DIAGRAM LL-T1620H/B

PC-UM10M

LL-T1520-H/B LL-T1620-H/B CIRCUIT DIAGRAM

6 – 2

876543

12345678

2/6

(1) MAIN PWB

DIGITAL EDID

ANALOG EDID

DVI SEL

DIGITAL

VDD

ANALOG

DIGITAL

DIGITAL I/F

RX2- 5

RX0- 5

RX0+ 5

RX2+ 5

RX1+ 5

RX1- 5

ARIN 1

AGIN 1

ABIN 1

AVIN 1

AHIN 1

DVI SEL 5

RXC- 5

RXC+ 5

3.3V

R45

10k

R168

R46 22

TP229

TP187

R14 22

R12

10k

R64

10k

TP190

TP231

10K

R65

10k

10K

R66

10k

ZD2

TP233

TP191

CN1

TMDS

A GND

TX2-

TX2+

GND

TX4-

TX4+

DCLK

DDATA

A V

TX1-

TX1+

GND

TX3-

TX3+

VDD

GND

HPDETECT

TX0-

TX0+

GND

TX5-

TX5+

GND

TXC+

TXC-

A R

A G

A B

A H

ZD1

R44

10k

R26

100

R6 200

RB715F

1 2

TP152

TP234

IC9

BR24C01

8NC

GNDSDA

SCL

VCLK

VCC

FB3 NU

TP193

IC4C

74LVC14

5 6 TP232R15 200

TP195

IC2

SN74LV4053A

2Y1

2Y0

3Y1

3-COM

3Y0

INH

GND

VCC

2-COM

1-COM

1Y1

1Y0

C30

0.1u

IC4B

74LVC14

3 4

TP230

IC4D

74LVC14

9 8

R35

C31

0.1u

R36

TP188

TP8

C18

0.1u

39p

IC4E

74LVC14

11 10

TP235

TP189

39p

IC4F

74LVC14

13 12

R96

10k

FB2 NU

IC4A

74LVC14

1 2

DTC114EUA

3 2

R16

10k

FB1 NU

R27

100

4.7k

C44

0.1u

TP153

R162

100K

IC3

BR24C21

8NC

GNDSDA

SCL

VCLK

VCC

IC1

TC7SH32FU

5INB

INA

GNDOUT

VCC

10K

R10

TP186

TP7

PC-UM10M

LL-T1520-H/B LL-T1620-H/B CIRCUIT DIAGRAM

6 – 3

876543

12345678

3/6

(1) MAIN PWB

R/F : Input Clock Triggering Edge Select

( H - Rising, L - Falling )

16Kbit

RS : LVDS swing range select

( H - Normal, L - Reduced )

RESET VALUE : L

SDA

SCL

SDA

SCL

DBO2

DGE7

DRE7

DGO7

DBO0

DRO0

DGE6

DRE6

DBO0

DRE1

DRO4

DBO4

DGO4

DGE6

DGO3

DGO7

DRO3

DRE3

DGE4

DGE5

DRO2

DBO2

DRO5

DRE3

DRO6

DRE5

DGO0

DGE0

DBO7

DGE0

DGO2

DBO7

DGE3

DRE4

DRO7

DGO6

DBO1

DRE0

DRE2

DRE7

DRO7

DRO2

DGO5

DBO6

DGO5

DGO4

DGE7

DRE6

DBO6

DGO1

DGO6

DBO5

DGE5

DRO1

DBO1

DRO6

DBO3

DGE4

DGO3

DRE4

DBO3

DGO0

DRO4

DGE3

DRE0

DGE1

DGO1

DGO2

DBO4

DGE2

DRO5

DRE5

DBO5

DRO3

DRO1

DRE2

DGE2

DGE1

DBE4

DBE0

DBE6

DBE7

DBE2

DBE7

DBE3

DBE6

DBE5

DBE1

DBE0

DBE2

DBE1

DBE3

DBO[7..0]5

EDSCL5

DRO[7..0]5

DEN5

BLON5

DCLK5

DGO[7..0]5

DVSYNC5

DRE[7..0]5

DHSYNC5

XLVDS_PD5

EDSDA5

VOLUME4

DBE[7..0]5

DGE[7..0]5

AUSEL4

EDSEL5

5VSCL 3

5VSDA 3

SCL 1

5VSDA3

5VSCL3

SDA 1

STBY4

V12.5

LCD5V

12V

3.3V

+5V

V3.3 V3.3

3.3V

C146

FL11

C126

0.1u

IP1

S2.3

TP245

TP148

FL5

FL7

FL9

IC27

100

B24

B25

VCC

GND

B26

B27

HSYNC

VSYNC

CLKIN

R/F

TEST1

TEST2

MODE1

MODE0

6/8

XPDWN

TEST3

TEST4

TEST5

PLL_GND

PLL_VCC

PLL_GND

LVDS GND

TD2+

TD2-

TCLK2+

TCLK2-

TC2+

TC2-

LVDS VCC

TB2+

TB2-

TA2+

TA2-

LVDS GND

TD1+

TD1-

TCLK1+

TCLK1-

TC1+

TC1-

LVDS VCC

TB1+

TB1-

TA1+

TA1-

LVDS GND

R10

R11

R12

R13

VCC

GND

R14

R15

R16

R17

G10

G11

G12

G13

G14

G15

G16

G17

B10

B11

VCC

GND

B12

B13

B14

B15

B16

B17

R20

R21

R22

R23

R24

R25

R26

R27

VCC

GND

G20

G21

G22

G23

G24

G25

G26

G27

B20

B21

B22

B23

R70

TP246

FL3

R131

Q12

FB21

ACB2012M-600

TP149 FB22

FBM2125HM330-T

R123

4.7k

R133

R122

4.7k

C113

0.1u

R130

C111

R158

20K

R132

TP150

TP3

BR34 NU

1 8

2 7

3 6

4 5

TP237

R159

20K

TP243

CN11

LCD36P

GND

BO7

BO6

BO5

BO4

GND

BO3

BO2

BO1

BO0

GND

GO7

GO6

GO5

GO4

GND

GO3

GO2

GO1

GO0

GND

RO7

RO6

RO5

RO4

GND

RO3

RO2

RO1

RO0

GND

BR33 NU

1 8

2 7

3 6

4 5

Q13

2 1

BR29

1 4

2 3

C160

CN9

LCD40P

GND

DCLK

GND

VSYNC

HSYNC

GND

BE7

BE6

BE5

BE4

GND

BE3

BE2

BE1

BE0

GND

GE7

GE6

GE5

GE4

GND

GE3

GE2

GE1

GE0

GND

RE7

RE6

RE5

RE4

GND

RE3

RE2

RE1

RE0

VLCD

GND

C87

33u/16V

C134

BR32 NU

1 8

2 7

3 6

4 5

FL1

ACA3216M300

C88

0.1u

TP244

C150

82u/16V

FB16 BK2125LL560

BR31 NU

1 8

2 7

3 6

4 5

FB28

FBM2125HM330-T

BR30 NU

1 8

2 7

3 6

4 5

C130

Q11

TP242

R137

IC21

SN74LV4053A

2Y1

2Y0

3Y1

3-COM

3Y0

INH

GND

VCC

2-COM

1-COM

1Y1

1Y0

FB31

R13

IC16

M62334FP

8AO1

AO2

AO3

AO4

SDA

SCL

GND

VCC

FL10

FL12

CN12

VCC

GND

SELLVDS

BLON

DGND

RBIN3+

RBIN3-

RBCLKIN+

RBCLKIN-

RBIN2+

RBIN2-

RBIN1+

RBIN1-

RBIN0+

RBIN0-

RAIN3+

RAIN3-

RACLKIN+

RACLKIN-

RAIN2+

RAIN2-

RAIN1+

RAIN1-

RAIN0+

RAIN0-

LVDSGND

FL4

R136

4.7k

C159

FL6

FL8

FB17

ACB2012M-600

R18

C129

TP1

FL2

FB23

FBM2125HM330-T

R84

TP2

C135

R83 NU

C158

C162

0.1u

R138

IC19

HN58X2416

8NC

GNDSDA

SCL

VCC

R82 NU

TP238

R107

R95

100

TP236

TP239

R135

TP241

CN10

GND

+12V

GND

VON

VBR

TP240

R139

D19

1 2

R140 0

+C161

C136

LCD & LVDS

THC63LVD823

BK2125LL560

ACA3216M300

PC-UM10M

LL-T1520-H/B LL-T1620-H/B CIRCUIT DIAGRAM

6 – 4

876543

12345678

4/6

(1) MAIN PWB

(3216)

Power & Connector

A[18:0]5

D[7:0]5

LCDON 5

LEDR11

LEDY5

STBY 3

VOLUME3

AUSEL3

XPON5

>5 <5 SELECT5

INPUT5MENU5

NU15NU25

3.3V

V12.5 12V

3.3V

USB5V

LCD5V

12V

3.3V

D23 DAN202U

1 2

TP255

FB30

FBM2125HM330-T

C145

47u/25V

DTA114EUA

TP287

CN14

R128 1-F

Q10

DTC114EUA

C117

100u/25V

C147

0.1u

TP272

C141

82u/16V

R154

330K

+C137

470u/25V

TP258

C152

1600P

TP281

TP290

R124 300k

C149

47000p

TP161

FB32 FBMJ4516HS111

C116

470u/16V

C144

1000p TP280

CN8

LGY6506

GND

S L

S R

R IN

R OUT

L IN

L OUT

D26

TP261

C115

0.1u

TP291

R63 BK2125HS102

22uH

IC25

MD14ZIN

1617

32 S/S

F/B OCL-

OCL+

GND

R/C

VCC

N/C

VBOOT

VGL

N/C

VOUT

N/C

P.GNDN/C

VDD

N/C

VGH

N/C

GND

3.3/5V

VREF

N/C

AOUT

N/C

AMP-

CN6

GND

TP247

C131

0.1u

C139

0.1u

R127

10k

TP282

C140

1u (2125)

C155

100u/25V

D27

DAN217U

2 3

R143

4.7k

TP264

D20

D1FS4A

TP286

IP5

C114

470u/16V

C153

0.01u

TP292

D28

DAN217U

2 3

R129 1-F

TP276

IC201

TDA7496L

10 11

GND

INL

VAROUT_L

VOLUME

VARPUT_R

INR

SVR STBY

MUTE

GND

OUTR

OUTL

GND

TP288

D29

DAN217U

2 3

R62 BK2125HS102

IC22

uPC2933

4GND

OUTIN

GND

R120

200K

C128 100u/16V

TP248

TP251

R121

R141

D31

DAN217U

2 3

IP4

S1.0

R148

C138

R155

D32

DAN217U

2 3

R61 BK2125HS102

IP2

S1.8

CN5

GND

SEL

C154

220u/25V

TP249

D30

DAN217U

2 3

TP254

TP293

C42

0.33u

TP273

TP277

TP158

TP14

R60 HS2125HS102

FB33 FBMJ4516HS111

ZD3

CN7

KEY 9P

LEDY

LEDR

XPON

SELECT

INPUT

GND

BR11

10k*4

1 8

2 7

3 6

4 5

TP279

C133

100u/16V

C132

D22 DAN202U

1 2

C43

0.33u

TP294

TP257

TP274

R112

360

R59 BK2125HS102

C127

1u (2125)

IP3

R86 1k

R157

13k-F

R142

0 (2125)

IC23

4 1

NC OUT

CD VDD

GND

IC26

PQ20VZ1U

ON/OFF

GND

VOUTVIN

TP275

TP260

ZD4

PTZ13B

TP208

DTA114EUA

R85 1k

TP278

2SJ208

C124 470u/16V

BR38

10k*4

R88 1k

IC24 NU

1SW

VOS

GND

ON/OFF

VIN

BR37

10k*4

R87 1k

TP263

TP159

R156

1.5k-F

TP283

TP209

C157

100u/25V

D21

R25 BK2125HS102

R147

R113

360

TP289

L2 NU

TP210

TP266

C156

0.1u

TP284

C142

0.01u

C151

C143

0.01u

CN16

P/S

12V

GND

R23 BK2125HS102

TP285

TP252

C112

2200P

TP269

BR12

10k*4

1 8

2 7

3 6

4 5

R24 BK2125HS102

A16

A15

A1 D4

A17

A10

A14

A13

A12

A11

A18

XMRD5

1,5 INTR5

XMCS5

TXD1,5

XMWR5

3.3V

GND

D10

D11

D12

D13

D14

D15

XCS15

XCS14

R153 NU

CN15

GND

A10

A11

A12

A13

A14

A15

A16

A17

A18

A19

A20

A21

A22

VDD

XOE

XRESET

GND

CN13

GND

+5V

V3.3

BOOT

XMWR

BHE

RRST

NMI

RXD

TXD

GND

R145

10K

R151 NU

BR35

1 8

2 7

3 6

4 5

R152 NU

R146

R144

10k

BR36

1 8

2 7

3 6

4 5

10k

RXD

XRESET

S-80940SN

2SJ208

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