DOWNLOAD Sharp LC-20B2EA (serv.man2) Service Manual ↓ Size: 926.74 KB | Pages: 5 in PDF or view online for FREE

Model
LC-20B2EA (serv.man2)
Pages
5 Few pages! See other manuals at the bottom of the first or last page.
Size
926.74 KB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD / Contents, safety, specification, operation and dimensions (p.1-5)
File
lc-20b2ea-sm2.pdf
Date

Sharp LC-20B2EA (serv.man2) Service Manual ▷ View online

1
LC-20B2EA
SERVICE MANUAL
In the interests of user-safety (Required by safety regulations in some countries) the set should be restored
to its original condition and only parts identical to those specified should be used.
MODEL
LC-20B2EA
CONTENTS
»
IMPORTANT SERVICE SAFETY
PRECAUTION .................................................... 2
»
SPECIFICATIONS ............................................. 3
»
OPERATION MANUAL ...................................... 4
»
DIMENSIONS .................................................... 5
»
REMOVING OF MAJOR PARTS ....................... 6
»
ADJUSTING PROCEDURE OF
EACH SECTION ................................................ 9
»
TROUBLE SHOOTING TABLE ........................ 12
»
CHASSIS LAYOUT .......................................... 18
»
BLOCK DIAGRAM ........................................... 20
»
OVERALL SCHEMATIC DIAGRAM ................. 22
»
DESCRIPTION OF SCHEMATIC DIAGRAM .. 24
»
SCHEMATIC DIAGRAM
Ë
R/C RECEIVER and OPERATION Unit ..... 25
Ë
MAIN Unit .................................................. 26
Page
Page
Ë
TERMINAL Unit ......................................... 38
Ë
INVERTER-A Unit ...................................... 46
Ë
INVERTER-B Unit ...................................... 47
»
PRINTED WIRING BOARD ASSEMBLIES ..... 48
»
PARTS LIST
Ë
ELECTRICAL PARTS ................................ 52
Ë
MAIN UNIT ................................................ 52
Ë
TERMINAL UNIT ....................................... 56
Ë
R/C RECEIVER UNIT ................................ 60
Ë
OPERATION UNIT ..................................... 61
Ë
INVERTER-A UNIT .................................... 61
Ë
INVERTER-B UNIT .................................... 61
Ë
CABINET PARTS LOCATION .................... 62
Ë
ACCESSORIES PARTS ............................ 62
Ë
PACKING PARTS ....................................... 62
Ë
CABINET AND MECHANICAL PARTS ..... 63
»
PACKING OF THE SET ................................... 65
SHARP CORPORATION
LCD COLOUR TELEVISION
S42I4LC20B2EA
2
LC-20B2EA
Specifications
C AU T I O N :  F O R   C O N T I N U E D
PROTECTION AGAINST A RISK OF
FIRE REPLACE ONLY WITH SAME
TYPE FUSE. F3701 (2.0A, 125V),
F3702 (1.6A, 125V), F6700 (1.0A,
125V), F6701 (1.0A, 125V), F6702
(1.0A, 125V), F6703 (1.0A, 125V) ,
F6704 (1.0A, 125V)
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SAFETY NOTICE
Many electrical and mechanical parts in LCD television
have special safety-related characteristics.
These characteristics are often not evident from visual
inspection, nor can protection afforded by them be
necessarily increased by using replacement components
rated for higher voltage, wattage and etc.
Replacement parts which have these special safety
characteristics are identified in this manual; electrical
components having such features are identified by “ 
å
IMPORTANT SERVICE SAFETY PRECAUTION
Ë
Service work should be perfomed only by qualified service technicians who are thor-
oughly familiar with all safety checks and the servicing guidelines which follow:
and shaded areas in the 
Replacement Parts Lists and
Schematic Diagrams.
For continued protection, replacement parts must be
identical to those used in the original circuit.
The use of a substitute replacement parts which do not
have the same safety characteristics as the factory
recommended replacement parts shown in this service
manual, may create shock, fire or other hazards.
WARNING
1. For continued safety, no modification of any circuit
should be attempted.
2. Disconnect AC power before servicing.
BEFORE RETURNING THE RECEIVER
(Fire & Shock Hazard)
Before returning the receiver to the user, perform
the following safety checks:
1. Inspect all lead dress to make certain that leads are
not pinched, and check that hardware is not lodged
between the chassis and other metal parts in the
receiver.
2. Inspect all protective devices such as non-metallic
control knobs, insulation materials, cabinet backs,
adjustment and compartment covers or shields,
isolation resistor-capacitor networks, mechanical
insulators and etc.
3. To be sure that no shock hazard exists, check for
leakage current in the following manner.
Plug the AC cord directly into a 110~240 volt AC outlet,
and connect the DC power cable into the receiver's
DC jack. (Do not use an isolation transformer for this
test).
Using two clip leads, connect a 50k ohm, 10 watt resistor
paralleled by a 0.15
µ
F capacitor in series with all
exposed metal cabinet parts and a known earth ground,
such as electrical conduit or electrical ground connected
to an earth ground.
Use an AC voltmeter having with 5000 ohm per volt, or
higher, sensitivity or measure the AC voltage drop
across the resisor.
Connect the resistor connection to all exposed metal
parts having a return to the chassis (antenna, metal
cabinet, screw heads, knobs and control shafts,
escutcheon and etc.) and measure the AC voltage drop
across the resistor.
All checks must be repeated with the AC cord plug
connection reversed. (If necessary, a nonpolarized
adaptor plug must be used only for the purpose of
completing these checks.)
Any reading of 0.75V peak (this corresponds to 0.5
milliamp. peak AC.) or more is excessive and indicates
a potential shock hazard which must be corrected
before returning the monitor to the owner.
TO EXPOSED
METAL PARTS
CONNECT TO
KNOWN EARTH
GROUND
DVM
AC SCALE
50k ohm
10W
0.15 
µ
F
TEST PROBE
A     V
3
LC-20B2EA
 
-
SPECIFICATIONS
4
LC-20B2EA
CH
MENU
TV/VIDEO
Volume (
)/(+)
CH (
)/(
)
MENU
TV/VIDEO
 
 (MAIN POWER)
Speaker
POWER/STANDBY 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).
Speaker
Remote sensor window
(The actual location is not visible.)
Remote sensor indicator
A red indicator blinks when the TV set
receives the remote control signal.
Upper control panel
To change the vertical
angle of the LCD TV set,
tilt the screen up to 10
degrees forward or 20
degrees backward. The
TV set can also be
rotated 90 degrees
horizontally. Please adjust
the angle so that the TV
set can be watched most
comfortably.
Note:
)/(
), and 
Volume ( 
)/(+)
 on the main unit have the same functions as the same buttons on the
remote control. Fundamentally, this operation manual provides a description based on operation using the remote
control.
-
TV/VIDEO, CH(
-
L
R
A
U
DIO
 OU
T
A
V
-IN 1
RGB
A
V
-IN 2
S-VIDEO
VIDEO
L
R
A
UDIO
PO
WER
INPUT DC13V
L
R
A
UD
IO
 OU
T
A
V
-IN 1
RGB
A
V
-IN 2
S-VIDEO
VIDEO
L
R
A
UDIO
PO
WER
INPUT
DC13V
Carrying handle
POWER INPUT DC13V
AV-IN 1
(21pin Euro-SCART)
S-VIDEO
VIDEO
AUDIO (L
)
AUDIO (R)
AV-IN 2
Antenna
AUDIO OUT (L)
AUDIO OUT (R)
Headphones
Rear view
Remote Control
E
T
CH
TV/VIDEO
TEXT
REVEAL
HOLD
END
M
MENU
SOUND
SUBTITLE
OK
(Power)
OK, Programme Table
SUBTITLE
Displays the Teletext
Subtitle directly.
HOLD
Temporarily holds
the current Teletext page.
Mute
Yellow, 
Timer function Menu
Green, Sound Menu
Cyan, Status Display
Turns on the status display
when the menu is not
displayed.
TV/VIDEO
Channel Select
MENU
Volume (+)/(-)
Flashback
Returns to the
previous channel.
Red, Picture Menu
Upwards
/Downwards 
Selection, zoom display 
function
(Teletext mode)
END
TEXT
SOUND
Switches the
   sound mode.
REVEAL
Displa
ys hidden 
inf
or
mation such as 
solutions to r
iddles and 
puzzles
.
Right 
/ Left Selection
CH (    
)/(    
Displays previous/
next page
(Teletext mode)
OPERATION MANUAL
Page of 5
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Sharp LC-20B2EA (serv.man2) Service Manual ▷ Download

  • DOWNLOAD Sharp LC-20B2EA (serv.man2) Service Manual ↓ Size: 926.74 KB | Pages: 5 in PDF or view online for FREE
  • Here you can View online or download the Service Manual for the Sharp LC-20B2EA (serv.man2) in PDF for free, which will help you to disassemble, recover, fix and repair Sharp LC-20B2EA (serv.man2) LCD. Information contained in Sharp LC-20B2EA (serv.man2) Service Manual (repair manual) includes:
  • Disassembly, troubleshooting, maintenance, adjustment, installation and setup instructions.
  • Schematics, Circuit, Wiring and Block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Exploded View and Parts List.