Akai LM-H17CLSA User manual

Service Manual
AKAI
17” Wide Screen
LCD Multi-Media Display
L
LM M- -H H1 17 7C CL LS SA 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.
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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.
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2. Specifications
2.1 Specification :
ITEMS SPECIFICATION
Screen size 17” Wide TFT-LCD Panel (Fujitsu)
Aspect Ratio 16：9
Resolution 1280 x 768 (Wide-XGA)
Contrast Ratio 400 : 1 (Typical)
Brightness 400 cd/m² (Typical)
Viewing Angle 160° (Hor.) / 160° (Vert.)
Response Time : Ton / Toff 15ms / 10ms
Display
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)
TV Function
Teletext 10 Pages (FLOF / TOP )
Color System PAL / SECAM / NTSC
AV1 (In / Out) 21-pin SCART (RGB / Video) x 1
Video (Composite) x 1
S-Video x1
AV2 (In)
Component (YPbPr, YCbCr) x 1
( DTV system : 625p)
Audio
L/R x 1
Video I/O
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 Analog: FH: 31kHz to 60kHz
F
v: 56Hz to 75Hz
Recommended Analog: 1024x768 (60Hz)
PC I/P
DTV ready (via D-sub 15pin) DTV System : 625p
Speaker (Built-in) : 3.5W+3.5W (rms)
Headphone Mini-jack for stereo (3.5 mm)
Audio O/P Audio O/P: L/R
Line Out (RCA L/R)
PIP under PC mode Yes
A.P.S. , Child-Lock Yes
Other Functions
VESA Panel Wall Mounting Holes 100mm x 100mm
Power Supply DC 12V / 5A (external AC adapter)
AC 100V~240V, 50/60Hz
Power
Power Consumption < 60W
Panel Tilt Forwards/ Backwards /Rotation -5°/ +15° / ±180°
Weight (net) 6.5 Kg (Without Accessories)
Accessories Remote Control, Batteries x 2 , AC adapter, AC cord, 15 Pin D-Sub Signal Cable ,
Cable Clamps , Operation Manual .
-3-

2.2 PC I/P Preset Timing Table :
Analog Input
Mode No. Mode Name
Resolution
H.Freq. (kHz)
V.Freq. (Hz)
H. Polarity
V. Polarity
Pixel
CLK
(MHZ)
1 VGA 70Hz
640x350
31.469
70.087
+
- 25.175
2 VGA 60Hz
640x480
31.469
59.941
-
- 25.175
3 VGA 72Hz
640x480
37.861
72.81
-
- 31.5
4 VGA 75Hz
640x480
37.5
75.0
-
- 31.5
5 SVGA 56Hz
800x600
35.16
56.25
+
+ 36.0
6 SVGA 60Hz
800x600
37.876
60.317
+
+ 40.0
7 SVGA 72Hz
800x600
48.077
72.118
+
+ 50.0
8 SVGA 75Hz
800x600
46.875
75.0
+
+ 49.5
9 XGA 60Hz
1024x768
48.363
60.004
-
- 65.0
10 XGA 70Hz
1024x768
56.476
70.069
-
- 75.0
11 XGA 75Hz
1024x768
60.023
75.029
+
+ 78.75
12 MAC VGA
640x480
35.0
66.667
-
- 30.24
13 MAC VGA
832x624
49.725
74.550
-
- 57.283
14 US TEXT
720x400
31.469
70.087
-
+ 28.322
15 WXGA 60Hz
1280x768
47.733
60.042
-
- 80
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3. Connection ＆Applications
-5-

NOTE:
zAudio 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.
zVCR 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 .
zPIP sound : When using the PIP feature in PC mode , to hear the Sub display sound you must set
the sound source to “Sub” .
-6-
(for TV only)

4. Controls Location
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: setuptheinputsource(PC,TV,SCARTVideo/SCARTRGB,
Video, S-Video, Component)
MENU: displaythemainmenu.
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.)
-7-
ASPECT RATIO VOLUME(-/+ ) CHANNEL(down/up) MENU SOURCE POWER
S
p
eake
r
S
p
eaker
Remote sensor window
Aim the remote control
towards this region on the
TV.
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).

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
-9-
Selectin
g
the Si
g
nal Source
TV
PC
SCART
VIDEO/S-V
COMPONENT
DISPLAY
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.
Menu Setting
MENU/ENTER
UP/DOWN
VOL- / VOL+
EXIT
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.
Changing Channels
P- / P+
0 ~ 9
DISPLAY
RTN
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.
Sound Control
VOL+ / VOL-
MUTE
SOUND
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.
Teletext Control
TELETEXT
INDEX
HOLD
UPDATE
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.

.
-10-
REVEAL
EXPAND
SUB-PAGE/TIME
RTN
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
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→
S-Video→Component
Press ▼button : Component→S-Video →Video→SCART RGB
→SCART Video→TV
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.
Other Function
RESET
ARC
APC
SLEEP
SUB-PAGE/TIME
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.
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
600 or 640 X 480. The PIP function will then work.

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
rightdirection. (Indicatedas“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.
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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 .
(Indicatedas“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’ ”)
5.3Loosen3screwsfromtheTunerBoard. (Indicatedas“G ”)
5.4 Lift up the Tuner Board, and pull out the 15-pin cable .
.
-13-
F’

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.
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-
I

-15-
3.5W + 3.5W
Speaker
Headphone Jack
Line-out (RCA)
Scart Audio Out
7. Block Diagram
AC Input
100~240V
50 / 60Hz + 12V
+ 8V
+ 5V
+ 2.5V
+ 3.3V
PC VGA I001
ADC
AD9883
-
140
I019
Scaler
TP6760
17”LCD
Panel
16:9
I012
MCU
SM59264C40
(SyncMOS)
Ke
y
Pad
INVERTER
I013
EEPROM: 24C16
Power
Su
pp
l
y
LED & IR Pad
Remote Control
8 bit
I006
ADC
AD9883-110
24 bit Port B
24 bit Port A
TTL
I009
4:1 Audio Processor
MSP3410G
I010
Audio Amp.
BA5417
Scart Audio
Video/S-V/ Component Audio
PC Audio
Mono TV
UT01
TV – Tuner
FQ1216 MK3
SIF
I029
TT Decorder
SAA5264PS
Interlace
I030
P15V330
Component
Scart-Video
Video
S-Video
Scart-RGB
Progressive
+12
Video
I018
Decorder
SAA7118E

8. Troubleshooting
8.1 Symptom Codes : ( for Call Center use )
CODE SYMPTOM COUNTERMEASURES
NP1 No Picture and No Sound
in TV mode.
•Make sure the Power cord and Aerial Cable are
properly connected .
•Make sure the batteries in remote control are not flat.
•Press the POWER button to switch the TV on.
•Switch to TV source by pressing “TV” button.
•Run “Automatic Search ” by operating the remote
control.
NP2 No Picture and No Sound
in video mode.
•Check the connection between the optional video
equipment and the TV.
•Press SCART , Video/S-V or COMPONENT button
on the remote control to select the right video
equipment.
No picture and and no Sound
NP3 TV is automatically turned
off.
•Check if the “SLEEP” timer is activated .
•Press the POWER button to turn on the TV once
again.
PP1 Double Images /Ghosts If the TV suffers interference from signals reflecting from
mountains or buildings , double-pictures or Ghosts will
occur.
•Adjust the aerial’s location and direction
•Replace it with one with better directionality.
•Turn off or disconnect the booster if it is in use , as
the booster may be inappropriate.
PP2 Snowy picture and noisy
Sound
If snow totally blocks out the picture , there may be a
problem with the Aerial or Aerial Cable .
•Have the TV and aerial been connected properly ?
Has the aerial cable been damaged ?
•Is the aerial pointing in the right direction ?
•Is the aerial itself faulty ?
•Try using a booster , as signal transmission may be
low.
PP3 Distorted picture and
noisy sound
•Turn off or disconnected the booster if it is in use , as
broadcast signals may be too strong.
Poor Picture
PP4 Dotted Lines / Stripes
in the picture.
If the TV or aerial suffers interference from other
equipment , stripes or noise may appear in the picture.
•Keep the TV away from noise sources such as
personal computer , amplifier , cars, motorcycles or
hair-dryers.
•If the aerial suffers interference from a radio tower or
high-voltage wire , contact the local dealer.
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CODE SYMPTOM COUNTERMEASURES
PP5 Stripe noise . •Check the coaxial cable connected with the TV is not
oxidized
•Do not use 300 ohm twin lead cables as interference
may occur
•It is recommended to use a 75 ohm coaxial cable (not
supplied) to get premium quality picture.
•Keep the aerial cable away from other connecting
cables.
Poor Picture
PP6 No color, too light or too
dark
•Adjust the picture settings — APC, Brightness,
Contrast, Saturation , Color Temp.
•Press “RESET ” button on remote control .
NS1 Good picture, no sound •Make sure the headphone is not connected.
•Check audio connections between Equipment &
LCD-TV.
•Press MUTE or VOL + to cancel the muting.
NS2 Noisy noise •Make sure that the aerial connected is 75 ohm coaxial
cable (not supplied) , not 300 ohm twin lead cables .
•Keep the aerial cable away from other connecting
cables.
•Press SOUND to select “Mono” which will reduce
the noise
•Adjust BASS or TREBLE properly in OSD.
NS3 No sound in TV mode If the Country setting for the TV is incorrect , it may
prevent the sound from being issued
•Select the Country where you are located in OSD
Menu.
•If the country is not listed in OSD , select “Other
Country” .
No Sound or Noisy Sound
NS4 Good picture, but noisy
sound or no sound in TV
mode.
•If the sound of “all the channels” is noisy , run
A.P.S. again by selecting Automatic Search in OSD.
•If the sound of “some channels” is noisy or no
sound , select Manual Search and select an
appropriate TV system in OSD such as B/G , D/K ,
I , L/L’ ; then , store it.
( If the sound system setting for a TV channel is
incorrect , it may prevent the sound from being issued .)
PC1 PC display is Not Full
Screen
•Select Auto Image Adjust in OSD menu to optimize
the image .
•If executing Auto Image Adjust still can not achieve
full screen display, adjust V.Position and H.Position
in PC mode
PC
PC2 Horizontal Noise or Color
pattern is not uniform
•Select Auto Image Adjust in OSD menu to optimize
the image .
•If still no good , adjust H. Phase in OSD menu
-17-

CODE SYMPTOM COUNTERMEASURES
PC3 “Out of Range”message •Maximum PC resolution supported is 1024x768 /
1280 x 768, so the screen will appear “Out of range”
at higher resolution.
•Reduce the resolution to 1024x 768/ 1280x 768 from
PC .
PC4 No Sound •Make sure PC audio Input is well connected.
PC5 “Not Available” message
on PIP
•If Main-Display is PC and Sub-display is
Component , resolution of the PC should be reduced
to 800 x 600 or lower ;then , the PIP will work well.
PC
PC6 After “No Signal ” has
appeared on PC mode for
a while, the view
disappears and the “ LED
Indicator” turns from
Green to”Red” .
•Press any key on keyboard or move the mouse to
activate the PC , because the PC may go to power
saving status.
•Check if the D-sub connector (Cable) is disconnected
or loose .
RC1 Remote Control does not
work
•Make sure the batteries in remote control are not flat
•Check the polarity of the batteries
•Use the remote control in the front of the TV or from
less than seven meters away.
•make sure the Remote Sensor Window is not under
strong lighting.
Remote Control
RC2 Can not change channels
with the remote control
•Press TV button to switch to TV mode.
•Make sure the TV is not in Teletext mode.
•
Picture Halt / Abnormal
PH1 Picture suddenly Stops
Responding or abnormal.
•Press RESET button on remote control .
•Unplug and then plug the Power Cord of the TV
from the AC outlet (or the Adapter from the TV).
•If the picture still no good , execute “Initial
EEPROM”.
Press POWER key to turn off the TV . Press“CH∇” key
on the top of LCD TV ( don’t release ) ; then, press
POWER button on remote control until “Initial
EEPROM” appears on the screen .
(Note : Remind user that every setting will be return to
factory preset mode including Child Lock , PIN No. ,
Programs …)
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