AOC Envision LE19W037 User manual

18.518.5
″″
&21.5&21.5
″″
&23.6&23.6
″″
LCD LCD
TV TV
AOC AOC
LE19W037&LE22(24)LE19W037&LE22(24)
H037H037
11
ServiceService
ServiceService
ServiceService
Horizontal FrequencyHorizontal Frequency
31~60 KHz31~60 KHz
TABLE OF CONTENTSTABLE OF CONTENTS
DescriptionDescription
Page Page
Description Description
PagePage
SAFETY NOTICESAFETY NOTICE
ANY PERANY PER
SON SON
AA
TTEMPTINTTEMPTIN
G TO SEG TO SE
RVICE RVICE
THIS CHASSTHIS CHASS
IS MUST FIS MUST F
AMILIARIZE HAMILIARIZE H
IMSELF WITH IMSELF WITH
THE CHASSTHE CHASS
ISIS
AND BE AND BE
AWAW
ARE OF THARE OF TH
E NECESSE NECESS
ARY SARY S
AFETY PRAFETY PR
ECAUTIONS ECAUTIONS
TO BE USTO BE US
ED WHEN SED WHEN S
ERVICINGERVICING
ELECTRONIC EQUIPMENT CONTAINING HIGH VOLTAGES.ELECTRONIC EQUIPMENT CONTAINING HIGH VOLTAGES.
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICINGCAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING
6.2 Power Board………………..…….…….………......346.2 Power Board………………..…….…….………......34
6.3 LED Board……...…………..…….…….………......446.3 LED Board……...…………..…….…….………......44
6.4 Key 6.4 Key
Board………………Board………………
………..……..……….......45………..……..……….......45
6.5 IR 6.5 IR
Board………………Board………………
………….……..……….......45………….……..……….......45
7. Adjustment……..………………………….................467. Adjustment……..………………………….................46
8. Block Diagram.……...............................................478. Block Diagram.……...............................................47
9. 9.
Schematic Diagram…..…………....…………Schematic Diagram…..…………....…………
……...49……...49
9.1 Main Board…………………………………...…......499.1 Main Board…………………………………...…......49
9.2 Power Board…………..….….……...………….......589.2 Power Board…………..….….……...………….......58
9.3 LED 9.3 LED
Board………….……..….…Board………….……..….…
…...………….......66…...………….......66
9.4 Key 9.4 Key
Board………………Board………………
.……….…………….........68.……….…………….........68
9.5 IR 9.5 IR
Board……...………….……Board……...………….……
….…………….........69….…………….........69
10. Exploded View……………………………….…....7010. Exploded View……………………………….…....70
11. BOM List……..……….………………….…………..7411. BOM List……..……….………………….…………..74
Table of Contents.......……....................................….......1Table of Contents.......……....................................….......1
Important Safety Notice.......................................…….....2Important Safety Notice.......................................…….....2
Revision Revision
List…………………List…………………
…………………………………………
………....3………....3
1. 1.
General General
SpeSpe
cification..............................……...….......5cification..............................……...….......5
2. 2.
Operating Instructions………………...…….…Operating Instructions………………...…….…
…….......6…….......6
2.1 The Use 2.1 The Use
of Remote Control…….…..……….…….......6of Remote Control…….…..……….…….......6
2.2 To Use the 2.2 To Use the
Menus….....………………Menus….....………………
….…..…….......7….…..…….......7
2.3 How 2.3 How
to Connect……..……………….…….……to Connect……..……………….…….……
….....17….....17
2.4 Front Panel Control 2.4 Front Panel Control
Knobs…….…………Knobs…….…………
.……….....19.……….....19
3. Input/Output Specification…………....................…....203. Input/Output Specification…………....................…....20
4. Mechanical I4. Mechanical I
nstructions…………nstructions…………
………….................22………….................22
5. Repair Flow Chart 5. Repair Flow Chart
………………………………………………
.…….…….....25.…….…….....25
6. PCB 6. PCB
Layout ………………..…………………....….......32Layout ………………..…………………....….......32
6.1 6.1
Main Board…………..………………...…….…Main Board…………..………………...…….…
….......32….......32

22
Important Safety NoticeImportant Safety Notice
Proper service and repair is important to the Proper service and repair is important to the
safe, reliable operation of all AOC Company Equipment. The servicesafe, reliable operation of all AOC Company Equipment. The service
procedures recommended by AOC and described in this service manual are effective methods of procedures recommended by AOC and described in this service manual are effective methods of
performing serviceperforming service
operations. Some of these service operations require the use of toperations. Some of these service operations require the use of t
ools specially designed for the purpose. Theools specially designed for the purpose. The
special tools should be used special tools should be used
when and as when and as
recommenderecommende
d.d.
It is It is
important to note that important to note that
this manual contains various CAUTIONS and NOTICES which should be carefully read inthis manual contains various CAUTIONS and NOTICES which should be carefully read in
order to minimize the risk of personal injury to service personnel. The possibility exists that improper serviceorder to minimize the risk of personal injury to service personnel. The possibility exists that improper service
methods may damage the equipment. It is methods may damage the equipment. It is
also important to understand that these CAUTIONS and NOTICES AREalso important to understand that these CAUTIONS and NOTICES ARE
NOT EXHAUSNOT EXHAUS
TIVE. AOC could not possibly know, evaluate and advise the service trade TIVE. AOC could not possibly know, evaluate and advise the service trade
of all conceivable ways inof all conceivable ways in
which service might be done or which service might be done or
of the possible hazardous consequences of each way. Consequentlyof the possible hazardous consequences of each way. Consequently
, AOC has not, AOC has not
undertaken any such broad evaluation. Accordingly, a servicer who uses a service procedure or tool which is notundertaken any such broad evaluation. Accordingly, a servicer who uses a service procedure or tool which is not
recommended by AOC must first satisfy himself thoroughly that neither his safety nor the safe operation of therecommended by AOC must first satisfy himself thoroughly that neither his safety nor the safe operation of the
equipment will be jeopardized by the service equipment will be jeopardized by the service
method selected.method selected.
Hereafter throughout this manual, AOC CompanHereafter throughout this manual, AOC Compan
y will be y will be
referred to as AOC.referred to as AOC.
WARNINGWARNING
Use of substitute replacement parts, which do not have the same, specified safety characteristics might createUse of substitute replacement parts, which do not have the same, specified safety characteristics might create
shock, fire, or other shock, fire, or other
hazards.hazards.
Under no circumstances should the original design be modified or altered without written permission from AOC.Under no circumstances should the original design be modified or altered without written permission from AOC.
AOC assumes AOC assumes
no liabilityno liability
, express or impli, express or impli
ed, arising out of any unauthed, arising out of any unauth
orized modificaorized modifica
tion of design.tion of design.
Servicer assumes all liability.Servicer assumes all liability.
FOR PRODUCTS CONTAINING LASER:FOR PRODUCTS CONTAINING LASER:
DANGER-Invisible laser radiations when open AVOID DIRECT EXPOSURE TO BEAM.DANGER-Invisible laser radiations when open AVOID DIRECT EXPOSURE TO BEAM.
CAUTION-Use of controls or adjustments or performance of procedures other than those specified herein mayCAUTION-Use of controls or adjustments or performance of procedures other than those specified herein may
result in hazardous radiation exposure.result in hazardous radiation exposure.
CAUTION -The use of CAUTION -The use of
optical instruments with this product will increase eye optical instruments with this product will increase eye
hazard.hazard.
TO ENSURE THE CONTINUED RELIABILITY OF THIS PRODUCT, USE ONLY ORIGINAL MANUFACTURER'STO ENSURE THE CONTINUED RELIABILITY OF THIS PRODUCT, USE ONLY ORIGINAL MANUFACTURER'S
REPLACEMENT PARTS, WHICH ARE LISTED WITH THEIR PART NUMBERS IN THE PARTS LIST SECTION OFREPLACEMENT PARTS, WHICH ARE LISTED WITH THEIR PART NUMBERS IN THE PARTS LIST SECTION OF
THIS SERVICE MANUAL.THIS SERVICE MANUAL.
Take care during handling the LCD module with backlight unitTake care during handling the LCD module with backlight unit
-Must mount the module using mounting holes arranged in four corners.-Must mount the module using mounting holes arranged in four corners.
-Do not press on the -Do not press on the
panel, edge of the frame strongly or panel, edge of the frame strongly or
electric shock as this will result in damage to the electric shock as this will result in damage to the
screen.screen.
-Do not scratch or press on -Do not scratch or press on
the panel with any sharp objects, such as pencil or pen the panel with any sharp objects, such as pencil or pen
as this may result in damage toas this may result in damage to
the panel.the panel.
-Protect the module from the ESD as it -Protect the module from the ESD as it
may damage the electronic circuit (C-MOS).may damage the electronic circuit (C-MOS).
-Make certain that treatment -Make certain that treatment
person’s body is grounded through wristband.person’s body is grounded through wristband.
-Do not leave the module in high temperature and in areas of -Do not leave the module in high temperature and in areas of
high humidity for a long time.high humidity for a long time.
-Avoid contact with water as it may a short -Avoid contact with water as it may a short
circuit within the module.circuit within the module.
-If the surface of -If the surface of
panel becomes dirtypanel becomes dirty
, please wipe it off with a soft , please wipe it off with a soft
material. (Cleaning with a dirty or rough cloth maymaterial. (Cleaning with a dirty or rough cloth may
damage the panel.)damage the panel.)

33
Revision ListRevision List
Version Version
Release Release
Date Date
Revision Revision
InstructInstruct
ionsions
CustomerCustomer
ModelModel
TPV ModelTPV Model
A00 A00
Jun.7,2010 Jun.7,2010
Initial ReleaseInitial Release
LE19W037LE19W037
E19A2ANSWEE7NNE19A2ANSWEE7NN
E19A2ANSWEE6NNE19A2ANSWEE6NN
LE22H037LE22H037
E22A2ANSWEE6NNE22A2ANSWEE6NN
E22A2ANSWEE7NNE22A2ANSWEE7NN
LE24H037LE24H037
E2CA6ANSWEE7NNE2CA6ANSWEE7NN
E2CA6ANSWEE6NNE2CA6ANSWEE6NN
A01 A01
Aug.12,2010Aug.12,2010
Add new ModAdd new Mod
el el
LE19W037 LE19W037
E19AAANSE19AAANS
WEB16NWEB16N
Add new power boAdd new power bo
ard ard
LE22H037 LE22H037
E22AGANSE22AGANS
WEB16NWEB16N
A02 A02
Dec.07,2010Dec.07,2010
Add new ModAdd new Mod
els els
LE19W037LE19W037
E19A7ANSWEE6NNE19A7ANSWEE6NN
E19A7ANSWEE7NNE19A7ANSWEE7NN
Add new power boaAdd new power boa
rdrd
715G4147P01H21002S&715G4147P01H21002S&
715G3798T02000004S715G3798T02000004S
Update are as below:Update are as below:
LayoutLayout
Schematic DiagramSchematic Diagram
BOM ListBOM List
LE22H037LE22H037
E22A7ANSWEE6NNE22A7ANSWEE6NN
E22A7ANSWEE7NNE22A7ANSWEE7NN
A03 A03
Jan.18,201Jan.18,201
1 1
Add new ModAdd new Mod
els els
LE24H037LE24H037
E2CA6ANSWEACNNE2CA6ANSWEACNN
E2CA6ANSWEAENNE2CA6ANSWEAENN
A04 A04
MayMay
.13,201.13,201
11
Add new LED boAdd new LED bo
ardard
715G4614T01000004S715G4614T01000004S
Update are as below:Update are as below:
PCB LayoutPCB Layout
Schematic DiagramSchematic Diagram
BOM ListBOM List
LE19W037LE19W037
E19A2ANSWEAENNE19A2ANSWEAENN
E19A2ANSWEACNNE19A2ANSWEACNN
E19A2ANSWEE9NNE19A2ANSWEE9NN
LE22H037LE22H037
E22A2ANSWEAENNE22A2ANSWEAENN
E22A2ANSWEACNNE22A2ANSWEACNN
E22A2ANSWEE9NNE22A2ANSWEE9NN
Add new power&LAdd new power&L
ED boardED board
715G4147P01H21002S&715G4147P01H21002S&
715G3798T02000004S&715G3798T02000004S&
715G4614T01000004S715G4614T01000004S
Update are as below:Update are as below:
Repair Flow ChartRepair Flow Chart
PCB LayoutPCB Layout
Schematic DiagramSchematic Diagram
BOM ListBOM List
LE24H037 E2CA6ANSWEE9NNLE24H037 E2CA6ANSWEE9NN
A05 A05
Aug.31,201Aug.31,201
11
Add new inverter boaAdd new inverter boa
rdrd
715G3798T02000004S715G3798T02000004S
Update are as below:Update are as below:
BOM ListBOM List
LE19W037LE19W037
E19A7ANSWEE65NE19A7ANSWEE65N
Add new ModeAdd new Mode
l l
E19A2ANSWE19A2ANSW
EAE5NEAE5N

4
A05
Aug.31,201
1
Add new Mod
els
LE19W037
E19B2ANSWEE8NN
E19B2ANSWEE7NN
E19B2ANSWEE9NN
Add new Mod
els
LE22H037
E22B2ANSWEE8NN
E22B2ANSWEE7NN
E22B2ANSWEE9NN
Add new power boa
rd
715G4313P02000003
Update are as below:
Repair Flow Chart
PCB Layout
Schematic Diagram
BOM List
LE24H037
E2CB6ANSWEE7NN
E2CB6ANSWEE8NN
E2CB6ANSWEE9NN
A06
Oct.8,201
1
Add new Mode
l
LE19W037
E19B2ANK
WEM55N
A07
Dec.5,201
1
Add new Mod
el
LE24H037
E2CA6ANS
WEE8NN

5
1. General Specification
* Entrada de S-Video
Puede conectar la TV a una fuente de
video de alta resolución (grabadora de videocasete Super VHS, reproductor
de discos láser y
sistema de entretenimiento hogareño con DVD) para obtener
una máxima satisfacción de
visualización.
Nota:
_ Los diseños y las es
pecificaciones e
stán sujetos a cambio
s sin aviso previo.
_ Este modelo podría s
er no compatible co
n las funciones y/o espe
cificaciones que
se agreguen en el futuro.

6
2. Operating Instructions
2.1 The Use of Remote Control

15

16

17
2.3 How to Connect

28
4. Sin Imagen
Revise señal L/P si
está
disponible
Reemplace main board
Reemplace power board
Panel Vcc = 5V?
Reemplace the Panel
Sin imagen (LED verde)
Reemplace main board
Revise si la luz del panel está
encendida= “On”
Revise cable LVDS
Vuelva a insertar o
Reemplace el cable LVDS
Reemplace main board
Reemplace Panel
No
Si
Si
No
Si
No
No
Si
Si
No
Si
No
Salida de Power board
＝
16V/12 V
？
Revise si el TV funciona,
si enciende/apaga
vía control remoto y botón de
power
.

29
5. Problema de Sonido
Sin sonido o sonido
anormal
Revise si TV está mudo (muted), ajuste el volume o
entre al modo menú para
reinicio?
Vuelva a insertar el cable de
audio o cambie
la norma del TV
Reemplace cable
Reemplace parlante
Reemplace main board
No
Si
Revise el cable entre los
parlantes y main
board si están OK
Revise los valores de Resistencia en el parlante que
se encuentran en
las especificaciones (Nota: El valor está marcado en
el parlante)
Revise la conexión de la fuente de audio y si
norma de
TV es correcto (NTSC-PAL N/M/ISTB)
Si
No
No
Si
No
Entre al modo menú de
fábrica para reinicar
No

30
6. Control Remoto - mal funcionamiento
Control remoto - mal
funcionamiento
Reemplace batería
Reemplace el control remoto
¿Es anormal la IR board?
Si
No
Reemplace IR board
Reemplace main board
No
Si
No
Si
Use otros controles remotos,
¿funciona?
Revise la
batería del con
trol remoto
si está
bien colocada o no tiene energía

3333

3434
6.2 Power Board6.2 Power Board
LE19W037 715G3762P01W30002SLE19W037 715G3762P01W30002S

3535

36

37
LE22H037/LE24H037 715G3895P01L30002H

38

39

47
8. Block Diagram
Himax M2D U405
Himax M2D U405
Himax M2D U405
Himax M2D U405
CN301
HDMI
CN104
YPbPr
HDMI_RXA0,A1,A2,CLK
Himax M2D
HDMI/ADC
AINA2,AINB2,AINC2,SOG2
CN107
AV&S-VID
EO
RX0,RX1,RX2,RXCLK
CVBS
Y,Pb,Pr
Y/C
CN102
VGA
AINB4,AINC4
AINA5
HSYNC,VSYNC
AINA1,AINB1,AINC1
R,B,G,H,V
CN105
SCART
SC_R,SC_G,SC_B
CN101
AV1
CVBS
AINC3,AINB3,AIND1
AINA3
EU/CH Option
AIN0_FAD,AIN1_FAD
FB_BLANK,STATUS
HDMI EDID(U301)
SDA,SCL
TU201
Tuner
OR
TU202
Tuner
AIND4
CVBS
Himax M2D
MCU
ADCINN,ADCINP
IF
 U201
SAWFILTER
RF/IF Tuner Option
B
A
C
K
B
A
C
K
S
I
D
E
SCL,SDA
B
A
C
K
B
A
C
K
B
A
C
K
U404
EEPROM
24C32
ADC KEY
IR
RS232
RS232
Hotel Pin
P0,P1
IR_DAT
PC Audio
Himax M2D
Audio
RS232
RAIN0,LAIN0
AV&S-Vi
deo
Audio(C
N107)
CN103
AV1&SCA
RT Opti
on
Audio
(CN104&CN105)
B
A
C
K
B
A
C
K
RAIN1,LAIN1
RAIN2,LAIN2
S
I
D
E
SIF
Tuner
U603
AMP TDA7
297
MUX_AUL
/R
COM1_AUL/R
MONO_AUD
U601
Switch 4052
YPbPr
Audio
CN603
Connector
CN601
Earphone
U604
APA2176A
U402
SPI EEROM
B
A
C
K
CN404
CN407
CN408
LVDS I/O
Himax M2D
TTL/LVDS/RSD
S
LVDS BUS
PANEL
AV Audi
o Line
Out
SCART Audio
(Option)
(CN106&CN105)
SCR_AUOUT_L/R
LVDS BUS
B
A
C
K
AV Line
Out
SCART CVBS Out
(Option)
(CN106)
CVBS_O
B
A
C
K
Backlight
On/Off,Brightness