LC-15B2E (serv.man2). Technical Manual (tentative) — Sharp TV Service Manual (repair manual)

Model
LC-15B2E (serv.man2)
Pages
32
Size
225.07 KB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD / Technical Manual (tentative)
File
lc-15b2e-sm2.pdf
Date

View Sharp LC-15B2E (serv.man2) Service Manual online

1
LC-13B2H/M
LC-15B2H/M
LC-20B2H/M
TECHNICAL MANUAL
MODELS
LC-13B2H/M
LC-15B2H/M
LC-20B2H/M
CONTENTS
1. SPECIFICATIONS OF PRODUCT ............................................................................................................... 2
2. GENERAL DESCRIPTION OF PRODUCT ................................................................................................. 3
3. GENERAL DESCRIPTION OF FUNCTIONS OF CIRCUITS IN EACH UNIT ............................................. 5
3-1.
Tuner circuit ....................................................................................................................................... 7
3-2.
Audio signal processing circuit .......................................................................................................... 8
3-3.
Video signal processing circuit........................................................................................................... 8
3-4.
Component signal processing circuit ............................................................................................... 10
3-5.
LCD controller circuit ....................................................................................................................... 10
3-6.
Gray level circuit .............................................................................................................................. 11
3-7.
Power supply circuit ......................................................................................................................... 12
3-8.
Inverter circuit .................................................................................................................................. 13
3-9.
Lamp error detection circuit ............................................................................................................. 13
4. TERMINAL NAME AND SHORT DESCRIPTION OF ICS ........................................................................ 14
5. DESCRIPTION OF ADJUSTING PROCEDURE ....................................................................................... 26
Page
SHARP CORPORATION
LCD COLOR TELEVISION
TENTATIVE
2
LC-13B2H/M
LC-15B2H/M
LC-20B2H/M
1. SPECIFICATIONS OF PRODUCT
IItem
                Model
LC-13B2H/M
LC-15B2H/M
LC-20B2H/M
LCD panel
13" TFT LCD
15" TFT LCD
20" TFT LCD
Number of dots
921,600 dots VGA
Viewing angles
H: 160
°
 V: 160
°
Video systems
Auto color mode
Yes
Yes
No
Color systems
N358, N443, PAL, PAL-M, PAL-N, SECAM, PAL-60
TV function
Destination
Hong Kong/Singapore/Oceania
TV Standard (CCIR) PAL-B/G/I/D/K/M/N, SECAM-B/G/D/K, NTSC-M
TV Tuning System Auto preset tuning
Stereo
NICAM/IGR
CATV
~ Hyper Band
4-LINE COMB FILTER
Yes
Yes
Yes
Brightness
430 cd/m
2
Lamp life
60,000 hours
Audio amplifier
2.1 W x 2
2.5W x 2
Speakers
4 x 7 cm Oval, x 2pcs.
5cm x 2pcs.
Terminals
AV1
AV-IN1, S-VIDEO-IN
AV2
AV-IN2/AV-OUT
COMPONENT
COMPONENT-IN(Y, Pb, Pr), AUDIO-IN (L, R)
Antenna
DIN-Type
Headphone
Mini-jack for stereo (3.5ø)
DC
EIAJ-Type4
Horn Type
OSD language
English / Chinese / Arabic
Power supply
DC input
DC12V
DC13V
AC input
AC 110-240 V, 50/60Hz (with AC adapter)
Weight (w/o accessories)
3.9kg
4.6kg
8.2kg
Size (cm)
W42.9 x H33.3 x D17.8
W48.4 x H37.1 x D19.8
W62.6 x H47.5 x D22.9
Accessories
Remote control, Batteries (2pcs.), Antenna cable, AC adapter, AC cord,
Cable clamps (2pcs.), Operation manual
Environmental conditions
Temperature
0 ~ 40 
°
C
Relative humidity
35 ~ 75 %
Design and specifications are subject to change without notice
3
LC-13B2H/M
LC-15B2H/M
LC-20B2H/M
2. GENERAL DESCRIPTION OF PRODUCT
The low-reflection black TFT liquid crystal used in the liquid crystal display provides high-contrast images
even in a bright room.  The newly developed high-efficiency backlight enables high-luminance display, leading
to higher image quality.  In addition, the full-range front double speaker realizes high sound quality such as
clear tones and powerful bass.
The life of the lamp used is as long as 60,000 hours.  Environment-conscious designs (recycling, material
selection, etc.) and energy-saving designs have been incorporated in this product.  In place of the conven-
tional mechanical appearance design of LCD televisions, this product realizes a decorative appearance de-
sign with the integral-type carrying handle, emphasized speaker section, etc.
(1) High-quality image
A high-definition TFT LCD panel of 921,600 dots (Vertical 480 x Horizontal 640 x 3) is employed.
The low-reflection black TFT liquid crystal that restrains outside light reflection improves the contrast in a bright
room.  In addition, a viewing angle of 160 deg.(vertical and horizontal) has been realized by employing the "Super
VA (Viewing Angle) (note)" technology.
Note: In this optical technology, the contrast of a liquid crystal display that varies when seen obliquely is improved
by using an optical compensating film between the TFT board and deflection plate, which does not affect the
image quality seen from the front.
(2) High luminance
The brand-new backlight system provides for the industry’s highest brightness as high as 430 cd/cm
2
. This system
is backed by some outstanding features. The lamp has been optimized in shape and inner diameter to improve the
efficiency in the lamp’s lighting efficiency and the incidence to the photoconductive plate. What’s more, the optical
sheet is made of new material and simply constructed, whereas the reflection mechanism is based on a new
technology.
(3) High sound quality
The 5-cm speaker unit employing a newly developed injection damper (note) that enables large power input in
spite of the small bore diameter and the closed type enclosure make it possible to reproduce bass of 100 Hz.  In
addition, 7-point equalizing realizes broadband and well-balanced frequency characteristics and provides high
sound quality corresponding to the appearance design. (LC-20B2H/M)
Note: While fabric and corrugation dampers have been conventionally used to absorb the vibration of a voice coil,
this product employs a butterfly-shaped damper made from special resin.
(4) Appearance design
The thin, lightweight and space-saving design has realized a depth of about 6 cm for 20" screen and a weight that
is about one third that of a cathode ray tube television. (Table 1)
The integral-type carrying handle realizes "Home mobile audiovisual device" that is easy to carry.  The product’s
appearance design that symbolizes the television of the 21st century can achieve harmony with any interior de-
signs and realizes the organic form in which one can feel familiarity and attachment.
Table-1
Power consumption
Depth
Weight
(W)
(mm)
(kg)
LCD television
LC-20B2H/M
43
*62.5
About 8.2
Cathode ray tube television 21C-FA1
99
489
About 26.6
LCD television
LC-15B2H/M
28
*58
About 4.6
Cathode ray tube television 15C-FM1
64
400
About 12.5
LCD television
LC-13B2H/M
25
*57
About 3.8
Cathode ray tube television 14C-GM1
57
360
About 8.7
(
*
:Only main body, except the stand)
4
LC-13B2H/M
LC-15B2H/M
LC-20B2H/M
(5) Environmentally sensitive technology
The power consumption of 20' LC-20B2H/M is as low as 43.
It means energy saving of about 57% as compared with our cathode ray tube television of the same screen size.
The life of the backlight is 60,000 hours (it is judged to be dead when the brightness is reduced by half), which
means that it can be used for about 10 years even if the TV is on for 16 hours per day.
The adoption of halogen material, the unification of fire retardant grade, the adoption of a stand 30% of which is
made from reworked material, the abolition of foam polystyrene and the construction design taking disassembling
into account have greatly reduced the load on the environment.
(6) Operability
The connection terminal is covered and the cable clamp can be attached to the foot of the stand, which are to make
the cable wiring not attract attention.
The adoption of a new design in the remote control makes it easy to hold it.  The frequently used volume/channel
select keys having the same image as the buttons located in the top portion of the main body also raised visibility.
Page of 32

Download Sharp LC-15B2E (serv.man2) Service Manual (Repair Manual)

Here you can view online or download Sharp LC-15B2E (serv.man2) Service Manual in pdf. This Service Manual can help you recover, restore, fix, disassemble and repair Sharp LC-15B2E (serv.man2) LCD. Information contained in Sharp LC-15B2E (serv.man2) service manual (repair manual) typically includes:

  • Disassembly, troubleshooting, programming, maintenance, remote, adjustment, installation and setup instructions.
  • Schematics, wiring and block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Parts list (bill of materials).