Sharp LC-37HV4E, AN-37U4-BAN-37L4-TAN-37W4K, AN-37U4-B, AN-37W4K, AN-37L4-T Service Manual
LC-37HV4EB, AN-37U4-B
AN-37L4-T, AN37W4K
SERVICE MANUAL
LCD COLOUR TELEVISION
MODELS
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.
CONTENTS
Page
» IMPORTANT SERVICE SAFETY PRECA UTION ...............................................................................................2
» SPECIFICATIONS..........................................................................................................................................4
» OPERATION MANUAL ..................................................................................................................................5
» DIMENSIONS ................................................................................................................................................7
» PARTS LIST ...................................................................................................................................................8
» PACKING OF THE SET ...............................................................................................................................16
OUTLINE
LC-37HV4EB model made a colour tone change based on LC-37HV4E.
This service manual has indicated only the change part from LC-37HV4E and the customized frame (AN-37U4-B/
L4-T/W4K).
For servicing, refer to the LC-37HV4E Service Manual (S33Y3LC37HV4E).
SHARP CORPORATION
Caution;It is recommended that the gloves supplied are worn when mounting the customized frame to
prevent fingerprints. As the gloves are slippery, carry out this operation with care.
Customized Frame
LC-37HV4EB
AN-37U4-B
AN-37L4-T
AN-37W4K
SY3L7LC37H4EB
2
LC-37HV4EB, AN-37U4-B
AN-37L4-T, AN37W4K
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1
SAFETY NOTICE
Many electrical and mechanical parts in LCD colour
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 , w attage , etc.
Replacement parts which have these special safety
characteristics are identified in this manual; electrical
components having such features are identified by “ å”
and shaded areas in the
Replacement Parts List
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.
CAUTION: FOR CONTINUED PROTECTION
AGAINST A RISK OF FIRE REPLACE ONLY WITH
SAME TYPE FUSE.
A VC SIDE: F701 (T2A, 250V)
LCD SIDE: F7501, F7502, F7503, F7504, F7551,
F7552, F7553, F7611, F7612, F7613, F7614, F7641,
F7642, F7643 (T1AL, 250V), F2701, F2702 (T2.5AH,
250V)
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, 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 220~240 volt A C outlet.
» 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.
» Use an AC voltmeter ha ving with 5000 ohm per v olt,
or higher, sensitivity or measure the A C v oltage drop
across the resistor.
» 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 35V peak (this corresponds to 0.7
mA. 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
IMPORTANT SERVICE SAFETY PRECAUTION
Ë
Service work should be performed only by qualified service technicians who are thoroughly familiar with all safety checks and the servicing guidelines which follow:
DVM
AC SCALE
50k ohm
10W
0.15 µF
TEST PROBE
3
LC-37HV4EB, AN-37U4-B
AN-37L4-T, AN37W4K
Precautions for using lead-free solder
1 Employing lead-free solder
"PWBs" of this model employs lead-free solder. The LF symbol indicates lead-free solder, and is attached on the
PWBs and service manuals. The alphabetical character following LF shows the type of lead-free solder.
Example:
2 Using lead-free wire solder
When fixing the PWB soldered with the lead-free solder, apply lead-free wire solder. Repairing with conventional
lead wire solder may cause damage or accident due to cracks.
As the melting point of lead-free solder (Sn-Ag-Cu) is higher than the lead wire solder by 40°C, we recommend
you to use a dedicated soldering bit, if you are not familiar with how to obtain lead-free wire solder or soldering bit,
contact our service station or service branch in your area.
3 Soldering
As the melting point of lead-free solder (Sn-Ag-Cu) is about 220°C which is higher than the conventional lead
solder by 40°C, and as it has poor solder wettability, you may be apt to keep the soldering bit in contact with the
PWB for extended period of time. However, Since the land may be peeled off or the maximum heat-resistance
temperature of parts may be exceeded, remov e the bit from the PWB as soon as you confirm the steady soldering
condition.
Lead-free solder contains more tin, and the end of the soldering bit may be easily corroded. Make sure to turn on
and off the power of the bit as required.
If a different type of solder stays on the tip of the soldering bit, it is allo y ed with lead-free solder. Clean the bit after
every use of it.
When the tip of the soldering bit is blackened during use, file it with steel wool or fine sandpaper.
Be careful when replacing parts with polarity indication on the PWB silk.
Indicates lead-free solder of tin, silver and copper.
Lead-free wire solder for servicing
Part No, ★ Description Code
ZHNDAi123250E J φ0.3mm 250g(1roll) BL
ZHNDAi126500E J φ0.6mm 500g(1roll) BK
ZHNDAi12801KE J φ1.0mm 1kg(1roll) BM
L Fa
4
LC-37HV4EB, AN-37U4-B
AN-37L4-T, AN37W4K
SPECIFICATIONS
Item 37 LCD COLOUR TV, Model:LC-37HV4EB
Video Colour System PAL/SECAM/NTSC 3.58/NTSC 4.43/PAL 60
TV
Function
B/G, D/K, I, L/L’
VHF/UHF
E2–E69ch, F2–F10ch, I21–I69ch, IR A–IR Jch
CATV
Hyper-band, S1–S41ch
TV-Tuning System
Auto Preset 99 ch, Auto Label, Auto Sort
STEREO/BILINGAL NICAM/IGR
Terminals SCART (AV in, RGB in, TV out)
INPUT 2
SCART (AV in/out, S-VIDEO in, AV Link)
INPUT 3
SCART (AV in/out, S-VIDEO in, RGB in), Component
ANTENNA 75
Din Type
INPUT 4 S-VIDEO, AV in
PC
15 Pin mini D-Sub, Audio in (Ø 3.5mm jack)
OSD language
English/German/French/Italian/Spanish/Dutch/Swedish/Portuguese/Greek/
Finnish/Russian/Turkish
Power Requirement
AC 220–240 V, 50/60 Hz
Power
Consumption
32 W (0.7W Standby)
Weight
5.4 kg (w/o stand), 5.5 kg (with stand)
Accessories
Operation manual, Remote control unit (
1), System cable ( 1), AC cord
(
2), LR6 (“AA” size) Alkaline battery ( 2), Stand unit ( 1), Speaker (L 1,
R
1), Speaker screw ( 4), Cable clamp (Large 1, Small 2)
TV-standard (CCIR)
Receiving
Channel
Rear INPUT 1
Front
LCD panel 37 Advanced Super View & BLACK TFT LCD
Number of dots 3,147,264 dots (1366 768 3 dots)
Brightness 430 cd/m
2
Backlight 60,000 hours (at Manual 0 position)
Viewing angles H : 170° V : 170°
Audio amplifier 10W
2
Speakers Ø 8 cm 2pcs
AVC
System
AV OUTPUT Audio (Variable, Fixed), S-VIDEO out, AV out
Headphones
Ø 3.5mm jack
AVC System
Display
AVC System
Display
138 W (0.9W Standby) (Method IEC60107)
16.5 kg (Display only), 19.9 kg (with Display and speakers), 24.0 kg (with
Display, speakers and stand)
DC OUTPUT DC6.5V 7W MAX
Specifications are subject to change without prior notice.
5
LC-37HV4EB, AN-37U4-B
AN-37L4-T, AN37W4K
OPERATION MANUAL
Confirming the Accessories1
2
Attaching the Fittings to the Customized Frame
2
Attach the fittings to the upper screw
holes on the rear of the customized frame
with the screws (Use the
driver)
Diagram showing both
fittings attached
1
Accessories for mounting
Fittings (× 2)
Top frame ( × 1)
Bottom frame (× 1)
Left and right frames
(× 1 each)
Screws ( × 18)
Corner decorations
( × 4)
Customized frame
2
Tools for mounting
Screw driver (m1)
• It is recommended that
the gloves supplied are
worn when mounting
the customized frame to
prevent fingerprints. As
the gloves are slippery ,
carry out this operation
with care.
Caution
Screw holes for
attachment
• Wear the gloves
supplied when
assembling the
frame to protect
it from soiling
and damage.
Caution
Upper rear of the
customized frame
Screw holes for
attachment
Fitting
Screw
FittingScrew
Fitting
Fitting
Gloves (m2)
Attaching the Customized Frame to the Unit3
Hook the fittings onto the upper rim of the unit
1
2
Attaching the Frames onto the Rear of the Customized Frame
4
Diagram showing the attached
top frame
12
Attaching the top frame (long frame with two indentations on its rear)
Diagram showing the customized frame attached to the unit
2
Attach so that the LCD TV
itself fits into the lateral
grooves on the rear of the
customized frame.
• This is to be carried out
after the speakers have
been attached to the unit.
Top frame
Continued on the next page
Align the indentations on the rear
of the frame with the fittings
Caution
Screw
Topframe
Screw
Attach this area
first without fail
Screw
Indentation
Screw
Indentation
6
LC-37HV4EB, AN-37U4-B
AN-37L4-T, AN37W4K
Attaching the left and right frames (short frames)
Attaching the bottom frame
Diagram showing the attached
left and right frames
34
Diagram showing the attached
bottom frame
56
2
Attaching the Corner Decorations onto the Frame
5
Diagram showing the attached
corner decoration
•Attach the other corners in the same
way
2
Attach so that the projecting part
on the rear of the corner
decoration fits into the slot on
the frame
1
Attach the
right frame
in the same
way
Attach this area
first without fail
Left frame
Screw
Left
frame
Top frame
Right
frame
Screw
Bottom
frame
Attach this area
first without fail
Left
frame
Bottom
frame
Top frame
Right
frame
Left frame
Top frame
Slot
Corner
decoration
Screw
Screw
Screw
Screw Screw
Continued on the next page
Completed Diagram6
Front
Back
• The display cannot be tilted after the customized
frame has been fitted. Be careful not to damage
the unit itself by trying to move it.
Caution
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