Akai LTA-16S5X3M User manual

LTA-16S5X3M

SERVICE MANUAL
Only For Professional Service Personnel Using
LTA-16S5X3M
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CONTENTS
CONTENTS
1
18
20
19
21
16
1. --------------------------------OPERATION PARTS 2
2. --------------------SYMPTOMS and CORRECTIONS 5
3. --------------------MANI BOARD FAULT JUDGMENT 6
4. -----------------------------SOFTWARE UPGRADE
5. ---
7.SPECIFICATIONS -----------------------------------
6. -----------------------MAIN ELECTRIC PARTS LIST
8.
SOFTWARE DATA'S RESTORATION AND ADJUSTMENT
ACCESSORIAL CIRCUITR DRAWING and CONFIGURATION DRAWING --

2
OPERATION PARTS
Top View of TV Set:
Rear View of TV Set
ITEM
1
5
2
4
FUNCTION DESCRIPTION
Press to select the input source.
Press to bring up the main menu to the
Press to increase or decrease the
Switch ON the LCD TV when at standby
TV/AV
STANDBY
MENU
3
Press to scan through channels.To scan
Quickly channels,press and hold down
-CH+
-VOLUME+
BUTTON NAME
Screen.
Either +/- button.
sound level.
Mode or vice versa
1.RF IN
2.HeadPhone OUT
3.PC Audio IN
4.AV-R
5.AV-L
6.AV
7.S-VIDEO IN
1 2 345678910
8.SCART
9.VGA IN
10.DC IN 12V
RF IN

3
OPERATION PARTS
Remote Control Unit
1.STANDBY
2.AUTO
3.0-9
4.-/--
5.
6.
7.
8.CH+ or CH-+ + --
9.VOL- or VOL+
10.DISPLAY
Press this button to switch on the TV when in standby mode or to enter
standby mode
Press to do auto configuration directly for PC-RGB.
Number selection.
To enter a program number for multipe program channel such as 2-1,etc.
Press to return to the previously viewed program.
Press these buttons to lower or raise the volume.
Press to display program or channel's information.
11.
14.LCD MENU
18.SMODE
17.EXIT
19.MUTE
20.ASPECT
21.NICAM
LCD TV Menu enter/exit.
15.PMODE Press to sycle through the diffrent picture mode.
Press this button to select the desire sound mode.
Exit menu operation.
Mute or restore sound
Press to select Picture Ratio.
UP/DOWN
Press these buttons to select channels in ascending or
descending order.
/
16.INPUT
Press to cycle through the input source to select TV、
AV、S-VIDEO、SCART、PC.
Multi-sound mode selection.
11
18
17
19
20
21
7
2
3
5
4
8
13
14
15
16
6
10
12
1
9
Press to select the favorite channels.
FAV
SLEEP Press to Set the sleeper timer for turning off into standby.
12.ENTER Confirmation key
/
13.LEFT/RIGHT

5
9
6
10
4
7
3
8
2
1
4
TELETEXT OPERATIONS
OPERATION PARTS
1.TEXT
2.HOLD
3.INDEX
4.SIZE
5.REVEAL
6.SUB.PG
7. PAGE UP
9.MIX
8.PAGE DN
10.CANCEL
Hold on or off for current page display.
Request the index page.
Change display size in teletext.
Reveal the teletext information.
Page up.
MIX the teletext and TV picture.
Page down.
Cancel teletext information.
Switch on or off the teletext mode.
Sub page.

5
Please make these simple checks as indicated (●) on the chart for the respective symptoms and their
possible remedies.
No picture, no sound
Poor sound, picture OK
Poor picture, sound OK
Weak picture
Blurred picture
Double image
Lines in picture
Distorted picture
Weak reception on some channels
Horizontal bars
Picture rolls vertically
Poor colour
No colour
Misoperation of Remote control
Remote control unit no operation
On Screen Display Control outside the screen
Symptoms
Possible Remedies
Try different channel, if OK, probably station trouble
Check aerial connections on back of set
Check aerial for broken wires
Re-orient aerial (if indoor type)
Probably local interference, such as an appliance
Adjust fine tuning control
Adjust brightness control
Adjust contrast control
Check if station is broadcasting colour
Adjust colour control
Check if system is correctly set
Check if on/off switch is "on"
Check batteries in remote control unit
SYMPTOMS and CORRECTIONS
SYMPTOMS and CORRECTIONS for TV SET

Power supply trouble
MANI BOARD FAULT JUDGMENT
6
Check F1(F1/3A) for12V
NY
Check if F1、E1are damaged? Turn on th eTV set .
Ch k E9 E10 5VC6 ff
f
3 3V
Y
Check thepowerModule rthe
power net following theF1.
hec 、 、 oo
o
rr
r
.、
E31.8V.
N
Check if the
pin3 ofU7、
U4are 5V? OK
N
Y
U5、
U7 aredamaged.
Check if thepin2 of U2、
U3、
U8is 12V?
YN
1. U2 、
U3、
U8aredamaged.
2.L1
、L11、L3 、
D5、
D6 are
damaged.
Check thecircuitfromthepin2
of U2、
U3、
U8 totheF1.
o
1.

MANI BOARD FAULT JUDGMENT
7
DisplAy（exceptional screen ）
Exceptional screen
Check if the cable is correct
and connected tightly
YN
Check if theLCD
panel is OK p
YN
Change thecable
forpanel
Change LCDso e of U12
Update
2.
3.Display T
T
r
r
ouble
ouble
（white screen）
White screen
Chkif h CN25i12 3
hec the pin 、2、3power
supply is normal?
YN
Check thepower supply Check if th
th
e
e
Voltage is wrong to panal
NY
The panel is damaged Check U12/ 7050 or
update software
circuit

MANI BOARD FAULT JUDGMENT
8
  

   

    
   
     


black

Black

screen
N
Y
Check

if
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normal
Check
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12V
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supply
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circuit
N
Change
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repair
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Check
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Y
inverter
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board
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Check
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if
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is
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N
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V?
Check
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supply
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
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Check
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R110、
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een
r
sc
（
ouble
TrayDispl
4.