LC-15B2EA (serv.man6). Chassis layout, block diagram and wiring diagram (p.18-23) - Sharp TV Service Manual (repair manual)

lc-15b2ea (serv.man6) service manual
Model
LC-15B2EA (serv.man6)
Pages
51
Size
4.89 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD / Chassis layout, block diagram and wiring diagram (p.18-23)
File
lc-15b2ea-sm6.pdf
Date

Read Sharp LC-15B2EA (serv.man6) Service Manual online

LC-15B2EA
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-15B2EA
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 WIRING DIAGRAM ........................ 22
»
DESCRIPTION OF SCHEMATIC DIAGRAM .. 24
»
SCHEMATIC DIAGRAM
Ë
RC/LED and OPERATION UNIT ............... 25
Page
Page
Ë
MAIN UNIT ................................................ 26
Ë
TUNER UNIT ............................................. 38
Ë
INVERTER UNIT ....................................... 46
»
PRINTED WIRING BOARD ASSEMBLIES ..... 47
»
PARTS LIST
Ë
ELECTRICAL PARTS ................................ 51
Ë
MAIN UNIT ................................................ 51
Ë
TUNER UNIT ............................................. 55
Ë
INVERTER UNIT ....................................... 59
Ë
RC/LED UNIT ............................................ 60
Ë
OPERATION UNIT ..................................... 60
Ë
CABINET AND MECHANICAL PARTS ..... 60
Ë
ACCESSORIES PARTS ............................ 62
Ë
PACKING PARTS ....................................... 62
»
PACKING OF THE SET ................................... 63
SHARP CORPORATION
LCD COLOUR TELEVISION
S42H2LC15B2EA
2
LC-15B2EA
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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, 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 thoroughly
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.
TO EXPOSED
METAL PARTS
CONNECT TO
KNOWN 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, 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.
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, 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 0.15µF 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.
CAUTION:  FOR CONTINUED PROTECTION
AGAINST A RISK OF FIRE REPLACE ONLY WITH
SAME TYPE F1(T1.25AL, 250V), F2(T1.25AL, 250V),
F6500 (T1.25AL, 250V) AND F6501 (T1.25AL, 250V)
FUSE.
DVM
AC SCALE
50k ohm
10W
0.15 
µ
F
TEST PROBE
3
LC-15B2EA
Specifications
Items
15" LCD COLOUR TV, Model: LC-15B2EA
LCD panel
15" Advanced Super View & BLACK TFT LCD
Number of dots
921,600 dots
Video colour system
PAL/SECAM/NTSC
TV
TV-Standard (CCIR)
B/G, I, D/K, L
Function
TV-Tuning System
Auto preset 200 ch.
STEREO/BILINGUAL
NICAM, IGR
AUTO PRESET
Yes
CATV
~Hyper Band
Brightness
430 cd/m
2
Lamp life
60,000 hours
Viewing angles
H: 170
°
 V: 170
°
Audio amplifier
2.1 W 
×
 2
Speakers
×
 7 cm Oval, 2 pcs.
Terminals
AV-IN 1
RGB
AV-IN 2
S-VIDEO, VIDEO, AUDIO
OUT
AUDIO
Antenna
DIN
Headphones
3.5 mm ø jack (Rear)
OSD language
English/German/French/Spanish/Italian/Swedish/Dutch
Power requirement
DC 12 V, AC 110 V – 240 V, 50/60 Hz
Weight
5.2 kg, incl. stand, excl. accessories
Accessories
Operation Manual, Remote Control, Batteries,
AC adapter, AC cord, Cable clamp
Specifications are subject to change without prior notice.
4
LC-15B2EA
Operation Manual
Ë
TV/VIDEOCH(    )/(    ), 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.
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 5
degrees forward or 10
degrees backward. The
TV set can also be
rotated 50 degrees
horizontally. Please adjust
the angle so that the TV
set can be watched most
comfortably.
Note:
Main unit (front view)
Terminals
L
R
AUDIO
 OUT
L
R
AUDIO O
UT
RGB
AV-IN 1
S-VIDEO
VIDEO
POWER
INPUT
DC12V
L
R
AUDIO
AV-IN 2
Antenna
AUDIO OUT (L)
AUDIO OUT (R)
Headphones
RGB
AV-IN 1
S-VIDEO
VIDEO
POWER
INPUT
DC12V
L
R
AUDIO
AV-IN 2
POWER
INPUT
DC12V
AV-IN 1
(21-pin Euro-SCART)
S-VIDEO
VIDEO
AUDIO (L)
AUDIO (R)
AV-IN 2
Rear view
Carrying handle
E
T
CH
TV/VIDEO
TEXT
REVEAL
HOLD
END
M
MENU
SOUND
SUBTIT
LE
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
The last Teletext page is 
displayed with the Reveal 
function activated. 
The Reveal function applies 
to this page only once.
Right / Left Selection
CH (    )/(    ) 
Display previous/
next page
(Teletext mode)
Remote control
Page of 51
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Here you can read online and download Sharp LC-15B2EA (serv.man6) Service Manual in PDF. LC-15B2EA (serv.man6) service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sharp LC-15B2EA (serv.man6) LCD. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.