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” .
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(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 .
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