Akai LM-H17CLSA Service Manual

Service Manual

AKAI

17” Wide Screen

LCD Multi-Media Display

L

L

M--

M

H

H

1

1

7

7

C

C

L

L

S

S

A

A

Table of Contents

1. Safety and Precautions …………………………………………………………1

2. Specifications.........................................................………………………………3

2.1 Specification.........................................……………………….…..3

2.2 PC I/P Preset Timing Table.....................................................…..4

3. Connection & Applications……………………..............................................…..5

4. Controls Location ..........................................................................……………….7

5. Remote Control..............................................................................………………..8

6. Disassembly Instructions.......................…………………………….……..……..11

7. Block Diagram....................................................………………………………….15

8. Troubleshooting……………...............................................………………………16

8.1 Symptom Codes ( for call center use). .............…………….…16

8.2 Flow Chart ( for service center use) ……….………....……….19

9. Electronic Circuit Description.....................................………………………..…24

10. Circuit Diagram...................................................…………………………..…….29

10.1 Main & Tuner Board......................…………………….……..29

10.2 Key & LED Board ......................……………………….…….40

11. PCB Layout...................................................…………………………………..…41

11.1 Main & Tuner PCB.......……………………………..………..41

11.2 Key & LED PCB…………………………………….……..….43

12. Electrical Parts List.....................................………………………………….…..44

13. Mechanical Disassembly....….............................................……………….……..51

14. Mechanical Parts List................................................……………………………52

1. Safety and Precautions

CAUTION

* The service of this LCD-TV must be carried out by qualified persons only.
* Do not change any module unless the set is switched off.

CLEANING：Always disconnect unit from mains supply before attempting to clean it.

Use soft cloth moistened with soapy water, wipe gently. Do not use
solvents of abrasive materials.

SOME DO’S AND DON’T’S ON THE SAFE USE OF EQUIPMENT

This equipment has been designed and manufactured to meet European
safety standards but like any electrical equipment, care must be taken if
you are to obtain the best results and safety is to be assured.

Do read the operating instructions before you attempt to use the equipment.

Do ensure that all electrical connections (Including the mains plug, extension leads

and interconnections between pieces of equipment) are properly made in accordance
with the manufacturer’s instructions. Switch off and withdraw the mains plug when
making or changing connections.

Do use only the power supply (AC adapter ) and power cord provided.

Do consult your dealer if you are ever in doubt of the installation, operating, or safety

of your equipment.

Don’t exert pressure on the LCD TV . This could break the panel .

Don’t continue to operate the equipment if you are in any doubt about it working

normally, or if it is damaged in any way. Switch off, withdraw the mains plug and
consult your dealer.

Don’t remove any fixed covers as this may expose dangerous voltages.

Don’t leave equipment switched on when it is unattended unless it is specifically

stated that it is designed for unattended operation or has a standby mode. Switch off
using the switch on the equipment and make sure that everyone knows how to do this.
Special arrangements may need to be made for infirm or handicapped people.

-1-

Don’t listen to headphones at high volume, as such use can permanently damage
your hearing.

Don’t obstruct the ventilation of the equipment, for example, with curtains or soft
furnishings. Overheating will cause damage and shorten the life of the equipment.

Don’t allow electrical equipment to be exposed to rain or moisture.

Above all

─ Never let anyone push anything into holes, slots or any other opening as this could

result in a fatal electric shock.

─ Never guess or take chances with electrical equipment of any kind.
─ It is better to be safe than sorry!

WARNING：TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT

EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE. DANGEROUS
HIGH VOLTAGES ARE PRESENT INSIDE THE ENCLOSURE. DO
NOT OPEN THE CABINET. REFER SERVICING TO QUALIFIED
PERSONNEL ONLY.

-2-

2.1 Specification :

ITEMS SPECIFICATION

Screen size 17” Wide TFT-LCD Panel (Fujitsu)

Aspect Ratio

Resolution 1280 x 768 (Wide-XGA)

Display

TV Function

Video I/O

PC I/P

Audio O/P

Other Functions

Power

Panel Tilt

Weight (net)

Accessories

Contrast Ratio 400 : 1 (Typical)

Brightness 400 cd/m² (Typical)

Viewing Angle 160° (Hor.) / 160° (Vert.)

Response Time : Ton / Toff 15ms / 10ms

OSD Language English, French, German, Spanish, Italian

TV Standard (CCIR) B/G, D/K, I and L/L’ (Multi-Europe)

Color System PAL / SECAM

Sound System NICAM / A2 (IGR)

Teletext 10 Pages (FLOF / TOP )

Color System PAL / SECAM / NTSC

AV1 (In / Out) 21-pin SCART (RGB / Video) x 1

AV2 (In)

AV3 (Out) Video (Composite) TV only x 1

Signal I/P Analog : D-Sub 15 pin (detachable cable)

PnP compatibility DDC / 2B

I/P Frequency

Recommended Analog: 1024x768 (60Hz)

DTV ready (via D-sub 15pin) DTV System : 625p

Audio O/P: L/R

PIP under PC mode Yes

A.P.S. , Child-Lock Yes

VESA Panel Wall Mounting Holes 100mm x 100mm

Power Supply

Power Consumption < 60W

Forwards/ Backwards /Rotation -5°/ +15° / ±180°

6.5 Kg (Without Accessories)

Remote Control, Batteries x 2 , AC adapter, AC cord, 15 Pin D-Sub Signal Cable ,

Cable Clamps , Operation Manual .

2. Specifications

16：9

Video (Composite) x 1

S-Video x 1

Component (YPbPr, YCbCr) x 1

( DTV system : 625p)

Analog: F

F

Speaker (Built-in) : 3.5W+3.5W (rms)

Headphone Mini-jack for stereo (3.5 mm)

Line Out (RCA L/R)

DC 12V / 5A (external AC adapter)

AC 100V~240V, 50/60Hz

-3-

H: 31kHz to 60kHz

v: 56Hz to 75Hz

Audio

L/R x 1

2.2 PC I/P Preset Timing Table :

Analog Input

Mode No.

1

2

3

4

5

6

7

8

Mode Name

Resolution

VGA 70Hz

640x350

VGA 60Hz

640x480

VGA 72Hz

640x480

VGA 75Hz

640x480

SVGA 56Hz

800x600

SVGA 60Hz

800x600

SVGA 72Hz

800x600

SVGA 75Hz

800x600

H.Freq. (kHz)
V.Freq. (Hz)

31.469

70.087

31.469

59.941

37.861

72.81

37.5

75.0

35.16

56.25

37.876

60.317

48.077

72.118

46.875

75.0

H. Polarity
V. Polarity

+

-

-

-

-

-

-

-

+

+

+

+

+

+

+

+

Pixel
CLK

(MHZ)

25.175

25.175

31.5

31.5

36.0

40.0

50.0

49.5

9

XGA 60Hz

1024x768

XGA 70Hz

10

1024x768

XGA 75Hz

11

1024x768

MAC VGA

12

640x480

MAC VGA

13

832x624

US TEXT

14

720x400

WXGA 60Hz

15

1280x768

48.363

60.004

56.476

70.069

60.023

75.029

35.0

66.667

49.725

74.550

31.469

70.087

47.733

60.042

-4-

-

65.0

-

-

75.0

-

+

78.75

+

-

30.24

-

-

57.283

-

-

28.322

+

­80

-

3. Connection ＆ Applications

-5-

(for TV only)

NOTE:

z Audio out : The level of audio output cannot be changed using the volume , treble , and bass

controls on your TV . These connectors should be used with an external audio amplifier
that can be used to control the volume.

z VCR Recording: The main display must set to TV mode in order to use the audio and video output to

record a program using a VCR .

z PIP sound : When using the PIP feature in PC mode , to hear the Sub display sound you must set

the sound source to “Sub” .

-6-

4. Controls Location

r

p

The buttons control your TV’s basic features, including the on-screen menu. To use the more
advanced features, you must use the remote control.

POWER: turn on or turn off the LCD TV.
SOURCE: set up the input source (PC, TV, SCART Video/ SCART RGB ,

Video, S-Video, Component)

MENU: display the main menu.
CHANNEL (down/up): change channels.
VOLUME (-/+): turn up or turn down the volume.
ASPECT RATIO: set up the ratio of display (Normal, Panscan, Zoom or Full.)

ASPECT RATIO VOLUME(-/+ ) CHANNEL(down/up) MENU SOURCE POWER

Speake

Remote sensor window

Aim the remote control
towards this region on the
TV.

S

Power indicator

A green indicator lights when the power is on
and a red indicator lights when in the standby
mode (the indicator will not light when the main
power is off).

-7-

eaker

5. Remote Control

The remote control pad works almost same as ordinary TV remote control that includes the
basic function needed while viewing a live video.

DISPLAY : Display the current source or program digits .

-8-

Summary of Control Buttons

Selecting the Signal Source

TV

PC

SCART

VIDEO/S-V

COMPONENT

DISPLAY

Menu Setting

MENU/ENTER

UP/DOWN

VOL- / VOL+

EXIT

Changing Channels

P- / P+

0 ~ 9
DISPLAY
RTN

Sound Control

VOL+ / VOL-

MUTE

SOUND

Teletext Control

TELETEXT

INDEX

HOLD

UPDATE

Switch to the TV mode.

Switch to the PC mode.

Switch to the Video mode or RGB mode from SCART.

Switch to the Video mode from RCA socket or S-Video mode.

Switch to the Component mode (YPbPr or YCbCr).

Display the current source.

Display the main on-screen menu or enter the next menu.

Press to select the item you want to adjust in the OSD menu.

Press to decrease or increase the value in the OSD control bar.

Exit from the menu.

Press P- or P+ to change Programs in TV mode or Teletext page in
TELETEXT mode.
To select programs directly in TV mode.
Display the current program digits.
Press to return to the previous program.

Press to turn up or turn down the volume.

Press to switch the sound on or off.

Press to choose Stereo, Bilingual and Monaural broadcasts.

Press to show the Teletext Service. Press again to return to TV Viewing.

Press “ INDEX“ button to show the list of teletext contents.

Press “ HOLD“ button to stop the automatic page change.

Press “ UPDATE“ button to switch to TV while waiting for the next text page.

-9-

RTN

REVEAL

EXPAND

SUB-PAGE/TIME

Press “REVEAL“ button to display concealed information, such as

solutions of riddles or a quiz.

Press “EXPAND“ button to enlarge the top half or bottom half of the

Teletext page.

Press “SUB-PAGE/TIME“ button to access to the sub-page you

required.

Press to return to the previous viewed Teletext page.

PIP Control

ON / OFF

PIP Source

SIZE

POSITION

NOTE : When you set Main-display at 1280x768/1024x768 resolution of PC mode and Sub-display
YPbPr, the screen will appear “Not Available“. You should reduce the PC resolution to 800 X

Other Function

600 or 640 X 480. The PIP function will then work.

RESET

ARC

APC

SLEEP

SUB-PAGE/TIME

Press to watch one of the video sources on Sub-display, whilst in
PC mode. Press again to turn off the Sub-display.

Press to select the PIP window input source as :
Press ▲ button : TV→ SCART Video→SCART RGB→ Video→

Press ▼ button : Component→ S-Video → Video→ SCART RGB

To make the PIP window double, large or small.

Press to move the PIP window to: Top Left → Top Right→
Bottom Right → Bottom Left → Repeat.

S-Video→ Component

→SCART Video→ TV

Reset to the original factory settings, such as theBrightness/Contrast/
Color Temp.

Set the picture window to Normal(4:3) → Panscan→ Zoom→ Full
(16:9)

To select Clear,Dark, or Nomal mode for picture control.

Press to select a preset time interval for automatic power off .

Press “Sub-Page/Time“ to display the digital clock in TV mode.

.

-10-

6. Disassembly Instructions

1) Face down the LCD-TV :

Face down the LCD-TV on a smooth plane with a soft material to protect
the panel faceplate .

2) Tuner Board Removal :

Note: If only repair the Tuner Board , needn’t disassemble the

Swivel Base and Back Cover .

2.1 Press the hook on the left side of Tuner Cover , and push toward the

right direction. ( Indicated as “B” )

2.2 Remove the Tuner Cover by sliding.

2.3 Loosen 3 screws on the Tuner Board. ( Indicated as “G” )

2.4 Lift up the Tuner Board, and pull out the 15-pin cable.

Then the Tuner Board could be taken apart from the LCD-TV.

-11-

3) Swivel Base Removal :

3.1 Loosen 2 screws and remove Neck Cover . (Indicated as “A” )

3.2 Loosen 4 screws from Neck Bracket and remove the Swivel Base .
(Indicated as “C” )

4) Back Cover Removal :

4.1 Remove the Tuner Cover by pressing and sliding . (Indicated as “B”)

4.2 Loosen 6 screws from the Back Cover . (Indicated as “E” and “D”)

4.3 Lift up Back Cover and pull out the cable from the key board on the top of the panel .

-12-

5) Right & Left Side Covers Removal :

5.1 Loosen 4 screws from Right & Left Side Covers . (Indicated as “F ”)

5.2 Loosen 2 screws from the 15 pin D-Sub connector on the right side of the panel.

(Indicated as “F’ ”)

5.3 Loosen 3 screws from the Tuner Board . (Indicated as “G ”)

5.4 Lift up the Tuner Board, and pull out the 15-pin cable .
.

F’

-13-

6) Metallic Shield Removal :

6.1 Loosen 8 screws from Metallic Shield of Main-PCB . (Indicated as “H”)

6.2 Remove Metallic Shield of Main-PCB from Main Bracket and then the
Main Board shows up.

I

7) MCU Removal (if need ) :

7.1 Clamp up the MCU by using an MCU clamp. (Indicated as “ I ”)

7.2 Put in new MCU and push fasten .

-14-

pply

Scart-Video

Scart-RGB

Component

AC Input
100~240V
50 / 60Hz

7. Block Diagram

Vid eo

S-Video

UT01

TV – Tuner

FQ1216 MK3

Video

Interlace

Progressive

PC VGA

Remote Control

Power

Su

SIF
Mono TV

I030

P15V330

+12

+ 12V
+ 8V
+ 5V
+ 2.5V
+ 3.3V

Video/S-V/ Component Audio

I029

TT Decorder

SAA5264PS

I018

Decorder

SAA7118E

I006

ADC

AD9883-110

I001

ADC

-

LED & IR Pad

Key Pad

EEPROM: 24C16

I013

4:1 Audio Processor

Scart Audio

MSP3410G

PC Audio

8 bit

24 bit Port B

24 bit Port A

-15-

I009

I019

Scale
TP6760

I012

MCU

SM59264C40

(SyncMOS)

r

I010

Audio Amp.

BA5417

TTL

16:9

INVERTER

3.5W + 3.5W
Speaker

Headphone Jack

Line-out (RCA)
Scart Audio Out

17”LCD

Panel