AKAI LEA-19S02P Service manual

LEA-19S02P

17

20

21

22

OPERATION PART S

Top View of TV Set:

Rear View of TV Set

TV/AV

MENU

VOL

VOL

CH

CH

ITEM

1

2

3

4

5

BUTTON NAME

MENU

TV/AV

-VOLUME+

-CH+

FUNCTION DESCRIPTION

Press to bring up the main menu to the

Press to select the input source.

Press to increase or decrease the

Press to scan through channels.to scan

Quickly channels,press and hold down

screen.

sound level.

Either +/- button.

Switch ON the LCD TV when at standby
Mode or vice versa

1.DC IN 12V

2.HDMI IN

3.VGA IN

4.PC Audio IN

5.SCART

6.HeadPhone OUT

7.Y IN

8.Pb/Cb IN

9.Pr/Cr IN

10.Video IN

11.Right channel Audio input

12.Left channel Audio input

13.RF IN

RF IN

13

L

12

11

R

V

10

IN

PR

9

PB

8

7

Y

DC12V
IN

1234

HDMI
IN

VGA
IN

PC AUDIO

IN

SCART

5

EARPHONE

OUT

6

2

OPERATION PART S

Remote Control

1

15

2

13

14

3

4

1.STANDBY

2.MUTE

3.0-9

4.SWAP

5.ASPECT

6

8

9

10

17
16

5

7

11
12

18

LCD MENU

6.

/

7.

8.ENTER

9.

/

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.

to

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.

3

OPERATION PART S

TELETEXT OPERATIONS

1.TEXT

2.HOLD

3.SIZE

4.INDEX

7

8

9

2
1

4

3
5
6

5. SUBPAGE

6.REVEAL

7.COLOR

8.

9.

Switch on or off the teletext mode.

Hold on or off for current page display.

Change display size in teletext.

Request the index page.

Sub page.

Reveal the teletext information.

These keys are effective in teletext Signa,please follow the prompts.

Page up.

Page down

4

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

correctly set

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 on/off switch is "on"

Check if system is

Check batteries in remote control unit

5

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Change LCD

Check if the cable for panel is correct and

Connected tightly

Y N

Check if the

LCD panel is OK

NY

Check if the output circuit jack is

normal

Y

Check the circuit of U14 Repair the damage

circuit

N

Change the cable for

Panel connector

ǃ Display Trouble ˄white screen˅

White screen

Check the power supply for

panel

NY

Check the switch signal for Q8/AO3401’s

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

Check CN17 or change

Q8

Check the circuit of U14 pins

Or if the I/O of U14 is damage

ǃ Display Trouble ˄black screen˅

NY

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

Y

Change U14

N

Is inverter power is normal?

NY

Check and repair power supply

Y

N

Check the circuit from BLON pin to U14

Check if inverter power

or U14 I/O damage (pin 67)

Is damage

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N

No Sound

Check if have audio signal

input

Y

Check the set of volume, Mute is normal

Check external

Audio equipment

Rest it

N

Check external

Y

speaker

Does Q28 has damage

And repair D47 or R257

Y

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

Is normal

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

Y

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

N

U21/TDA1517P

N

YN

YN

Check the circuit from U14 to U21

Repair the U21 power supply