Akai LTA-16S01P Schematic

LTA-16S01P

LEA-16S02P

LTA-19S01P

LEA-19S02P LTA-22S01P

LTA-24S01P

LTA-16S01P

LEA-16S02P

LTA-19S01P LEA-19S02P LTA-22S01P

LTA-24S01P

OPERATION PART S

Remote Control

1.STANDBY

2.MUTE

3.0-9

4.SWAP

5.ASPECT

17 16

11 12

LCD MENU

8.ENTER

10.VOL+ or VOL

11.

CH+ or CH-

12.SLEEP

13.PMODE

Press this button to switch on the TV when in standby mode or to enter standby mode

Mute or restore sound

Number selection.

Press to return to the previously viewed program.

Press to select Picture Ratio.

Menu enter/exit.

UP/DOWN

Confirmation key

LEFT/RIGHT

Press these buttons to lower or raise the volume.

Press these buttons to select channels in ascending or Descending order.

Press

Set

the Sleeper timer

turning off into standby.

for

Press to select different picture mode.

14.SMODE

15.INPUT

16.FAV

17.NICAM

18.PC AUTO

Press to select the different sound mode.

Press to cycle through the input source to select ATV,

HDMI,SCART,YPBPR,AV,VGA.

Press to select the favorite channels.

Multi-sound mode selection.

Press to do auto configuration directly for VGA Input.

SYMPTOMS and CORRECTIONS

SYMPTOMS and CORRECTIONS for TV SET

Please make these simple checks as indicated (●) on the chart for the respective symptoms and their possible remedies.

Possible Remedies

Symptoms

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

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

ǃ Power supply Trouble

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ǃ Display Trouble ˄([FHSWLRQDOVFUHHQ˅

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Exceptional screen

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FKLS

Change LCD

Check if the cable for panel is correct and

Connected tightly

Y N

Check if the

LCD panel is OK

Check if the output circuit jack is

normal

Check the circuit of U14 Repair the damage

circuit

Change the cable for

Panel connector

ǃ Display Trouble ˄white screen˅

White screen

Check the power supply for

panel

Check the switch signal for Q8/AO3401’s

G-pole voltage (3.3V~0V or 5V~0)

Check CN17 or change

Check the circuit of U14 pins

Or if the I/O of U14 is damage

ǃ Display Trouble ˄black screen˅

Change the LCD panel

Or the cable to panel

Black screen

The voltage of BLON Signal in

5V ? (on CN3)

Check the output signal of U14

Change U14

Is inverter power is normal?

Check and repair power supply

Check the circuit from BLON pin to U14

Check if inverter power

or U14 I/O damage (pin 67)

Is damage

ǃ$XGLR7URXEOH˄QRVRXQG˅

No Sound

Check if have audio signal

input

Check the set of volume, Mute is normal

Check external

Audio equipment

Rest it

Check external

speaker

Does Q28 has damage

And repair D47 or R257

Check signal output on pin no. 4 & 6 of U1

Is normal

Check power supply (>11V)on pin no. 7 of

Check the voltage (>9.2V) on pin no.8

Of U21

Check the signal output on pin 50 &51 of U14

Does it has signal input on U14

U21/TDA1517P

Check the circuit from U14 to U21

Repair the U21 power supply

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

TV cannot scan any channel/

picture

Check if the RF cable do have signael

Check the pin no. 7 of T1 is 5V

repair external RF equipment

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

Check the pin no. 8 of T1 has signal

Check the network from pin no.8

of T1 to U14 /TSUMV26KE

or network between U14

and TV pins or 33v Boost Circuit

TV no sound but pictures

Check the pin no. 4 & 5 of T1 has date of

Check pin no. 2 of T1 has voltage

(1.8 ~4.3V)

T1 damage

Repair this circuit

Check I2C net

(Circuit from pin

no.68 to pin no.69 of

SUMV26KE or from

pin4 to pin5 of T1)

Repair this

pin power

net

Ref to the repair process of

“No. 5 – Audio trouble (no sound)

Is the same on PC ?

Check the pin no. 1 & 2 of SAW1/AF389A2D has signal ?

1. SAW1 damage

2. The circuit from SAW1 to U14 is not in normal

3. U14 damage

Check the network

from the pin no. 1&2 to the

tuner

ǃFunction Trouble˄PC˅

Under PC channel

Picture is not in center

Do “Auto adust

“process

the DDC settings

color fade

Check the R.G.B input

signal for U14

Reset

Check

R.G.B circuit

Image Stabilization

Check if VS,HS signal is

ruled and stable

OSD settings do

not match,

reset the OSD or

input mode

not support

Check the circuit

of VS, HS

No signal

Check the circuit of VS, HS

ǃFunction Trouble˄SCART , HDMI,S-VIDEO,CVBS˅

SCART RGB .SCART Video. HDMI,S-VIDEO,CVBS

HDMI,S-VIDEO

Have no signal

1. HDMI terminal pad contact is badly

2 .System DDC settings

is wrong and reset it

3.U14 damage

Color fade

Check the input of R.G.B.

System settings is wrong

and reset it

Of U14

Check the wire from CVBS

terminal to signal source

1.Check the R.G.B circuit

2.Check U14 or the circuit of U14

CVBS has no signal

Check the signal input

of CN9 is normal

Whether the pin no.18

of U14 has input?

The soft of U14 is

not normal

Or U14 damage

Check the circuit

between

U14

and CN9

1. Hardware connection:

1.1 Connect the USB ISP tool to of PC, then driver.

1.2 For board upgrade, Connect the USB ISP tool and

CN18 cable as

1.3 For CBU upgrade, Connect

the

USB ISP tool to board plug the VGA main board.

USB

of main board with 4pin

below

with

picture.

4pin cable, then

board to

port

install

blue

VGA

Note: Please use the VGA

upg

rade method generally.

Please check carefully the

connection of TXD

and RXD board and

between upgrade

VGA board.

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