Sharp AQUOS LC-37HV4E User manual

LC-37HV4EB, AN-37U4-B
AN-37L4-T, AN37W4K
SERVICE MANUAL
LCD COLOURTELEVISION
MODELS
In the interests of user-safety (Required by safety regulations in some countries) the set should be re-
stored to its original condition and only parts identical to those specified should be used.
CONTENTS
Page
»IMPORTANT SERVICE SAFETY PRECAUTION ...............................................................................................2
»SPECIFICATIONS..........................................................................................................................................4
»OPERATION MANUAL ..................................................................................................................................5
»DIMENSIONS ................................................................................................................................................7
»PARTS LIST ...................................................................................................................................................8
»PACKING OFTHE 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
1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121
1
23456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012
1
1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121
1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121
1
23456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012
1
1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121
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, wattage, 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
SAMETYPE FUSE.
AVC 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 RETURNINGTHE 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 AC 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 having with 5000 ohm per volt,
or higher, sensitivity or measure the AC voltage 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
ËService work should be performed only by qualified service technicians who are thor-
oughly 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, remove 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 alloyed 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
LFa

4
LC-37HV4EB, AN-37U4-B
AN-37L4-T, AN37W4K
SPECIFICATIONS
Item 37 LCD COLOURTV,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,
R1), 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/m2
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
2Attaching 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 theFrames onto the Rear of theCustomized 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 LCDTV 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
Top frame
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
2Attaching 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

7
LC-37HV4EB, AN-37U4-B
AN-37L4-T, AN37W4K
Unit:mm
Display
DIMENSIONS

8
Ref. No. Part No. ★Description Code Ref. No. Part No. ★Description Code
LC-37HV4EB, AN-37U4-B
AN-37L4-T, AN37W4K
1 CANGTA037WJ05 J Rear Panel Ass’y
1-1 Not Available – Rear Panel —
1-2 HiNDPA780WJSA J Indication Label AP
2 CCABAA289WJ01 J Chassis Flame Ass’y BB
2-1 Not Available – Chassis Flame —
2-2 Not Available – Stand Angle —
2-3 LHLDW1021GE00 J Wire Holder, x2 AB
2-4 LHLDW1139CEZZ J Wire Holder, x1 AA
2-5 PZETZA008WJZZ J Insulating Sheet AK
2-6 QEARZA020WJFW J Earth Spring, x2 AC
2-7 XJPSN30P08XS0 J Screw, x2 AA
3 CCABBA111WJ05 J Bottom Cabinet Ass’y BD
3-1 Not Available – Bottom Cabinet —
3-2 GLEGGA012WJZZ J Leg, x4 AD
4 CCABBA170WJ02 J Top Cabinet Ass’y AY
4-1 Not Available – Top Cabinet —
4-2 TCAUHA049WJZZ J Caution Label AD
5 CANGTA023WJ01 J PC I/F Bottom Shield Ass’y AQ
5-1 Not Available – PC I/F Bottom Shield —
5-2 LHLDW1021GE00 J Wire Holder, x1 AB
5-3 PFLT-A004WJZZ J Spacer, x1 AE
6 CPNLCA066WJ02 J Front Panel Ass’y BH
6-1 Not Available – Front Panel —
6-2 GCOVAA288WJSB J Door Cover AX
6-3 GDORFA018WJSB J Door AN
6-4 HBDGBA013WJSC J Badge, "SHARP" AP
6-5 HDECQA166WJSA J LED Cover AF
6-6 HiNDPA290WJSB J Indication Label AH
6-7 JBTN-2074CEKB J Power Button AG
6-8 LANGF9552CESA J Angle, for Door AC
6-9 LANGTA024WJFW J Angle, for Damper AE
6-10 LANGTA047WJFW J Angle AC
6-11 LHLDZ3040GEZZ J Magnet Holder AD
6-12 LHLDZA138WJZZ J Button Holder AE
6-13 LX-BZ3434CEFN J Screw, x2 AB
6-14 MSPRC0210CEFW J Spring, for Power Button AB
6-15 PCOVPA014WJSB J Door Cover AK
6-16 PDMPFA001WJZZ J Damper AG
6-17 PSPAZ0457CESA J Spacer, for Door, x2 AA
6-18 XBPSN20P05000 J Screw, x2 AA
6-19 XEBSN30P08000 J Screw, x4 AA
PARTS LIST
PARTS REPLACEMENT
Replacement parts which have these special safety characteristics
identified in this manual: electrical components having such fea-
tures are identified by "å" in the Replacement Parts Lists.
The use of a substitute replacement part which does not have the
same safety characteristics as the factory recommended replace-
ment parts shown in this service manual may create shock, fire or
other hazards.
"HOWTO ORDER REPLACEMENT PARTS"
To have your order filled promptly and correctly, please furnish the
following informations.
1. MODEL NUMBER 2. REF. NO.
3. PART NO. 4. DESCRIPTION
5. CODE 6. QUANTITY
★ MARK : SPARE PARTS-DELIVERY SECTION
CABINET AND MECHANICAL PARTS
(AVC System)
Ref. No. Part No. ★Description Code
7 CSLDMA157WJ01 J PC I/F Top Shield Ass’y
7-1 Not Available – PC I/FTop Shield —
7-2 PSPAKA019WJZZ J Spacer AF
8 GCOVAA243WJSB J Side Cover(L) AP
9 GCOVAA244WJSB J Side Cover(R) AN
10 LANGTA022WJFW J PWB Angle, for MAIN Unit AN
11 LANGTA028WJFW J Inlet Angle AH
12 LANGTA039WJFW J PWB Angle, for AV Unit AP
13 LHLDW1009CEZZ J Wire Holder, x1 AA
14 LHLDW1033CEKZ J Wire Holder, x1 AA
15 LHLDW1060CEZZ J Wire Holder, x2 AB
16 LHLDW1121GEZZ J Wire Holder, x1 AB
17 LHLDZ2156CEN2 J Fan Holder AH
18 LX-BZ3434CEFN J Screw, x2 AB
19 NFANR0120CEZZ J Cooling Fan AU
20 NSFTZ0134CEFW J Shaft Screw, x8 AD
21 PSLDM4715CEFW J Earth Shield AD
22 PSLDMA144WJFW J Front Shield AQ
23 PSPAZA121WJKZ J Radiating Sheet AT
24 PSPAZA122WJKZ J Radiating Sheet AK
25 DUNTKB401FE03 – MAIN Unit —
26 DUNTKB493FE03 – POWER Unit —
27 DUNTKB592FE01 – AV Unit —
28 DUNTKB593DE21 – FRONT Unit —
29 DUNTKB594DE21 – SR Unit —
30 CPCi-A005WJ11 – PC I/F Unit —
31 QCNW-A847WJZZ J Connecting Cord(Main-AV) AD
32 QCNW-A848WJZZ J Connecting Cord AD
(Main-PC I/F)
33 QCNW-A849WJZZ J Connecting Cord AC
(Main-PC I/F)
34 QCNW-A833WJZZ J Connecting Cord(Front-AV) AE
35 QCNW-A838WJZZ J Connecting Cord AK
(Front-PC I/F)
36 QCNW-A828WJZZ J Connecting Cord(AV-SR) AK
37 QCNW-A844WJZZ J Connecting Cord AM
(PC I/F-SR)
38 QCNW-A825WJZZ J Connecting Cord AK
(Main-Power)
39 QCNW-A826WJZZ J Connecting Cord AG
(Main-Power)
40 QCNW-A846WJZZ J Connecting Cord AH
(Power-PC I/F)
41 QCNW-A822WJZZ J Connecting Cord(Main-AV) AF
42 QCNW-A823WJZZ J Connecting Cord(Main-AV) AM
43 QCNW-A824WJZZ J Connecting Cord(Main-AV) AQ
44 QEARZ0056CEFW J Earth Angle, x4 AC
45 QEARZ0057CEFW J Earth Angle, x1 AB
46 CEARZA023WJ01 J Earth Angle, x1 AL
47 CEARZA024WJ01 J Earth Angle, x1 AM
48 Not Available – Serial No. Label —
49 XBBSN30P06000 J Screw, x2 AA
50 XBPSN30P06000 J Screw, x6 AA
51 XEBS930P08000 J Screw, x6 AA
52 XJPSN30P08XS0 J Screw, x38 AA
53 XJPS930P08XS0 J Screw, x15

9
LC-37HV4EB, AN-37U4-B
AN-37L4-T, AN37W4K
654321
A
B
C
D
E
F
G
H
CABINET AND MECHANICAL PARTS (AVC System)
15
47
1-1
1-2
1
8
52
2-3 2-5
2-6
44
44
2-3
2-4
2-1
2-7
2-2
52
53
19
3
6
27 20 18
48
50
50
9
53
4
2145
52
28
46
17
53
6-19
3-2
3-1
53
6-9
6-16
6-18
6-19
6-10
6-12 6-19
6-5
53
6-1
6-4
6-14
6-7
6-8
6-6
6-3
6-11
6-17
6-13
6-15
6-2
12
36
52
5-2
5-1
5-3
29
5
35 52
33
32
40
30
52
7-2
23 24
7-1
52
7
41
38
16
31
10
52
52
25
42
52
53
4-1
4-2
53
53
43
37
49
11
52
39
14
26
34
52
53
52
22
20
52
51
AB
AD
AE
AA
AF
C
DC
BA
AB
L
L
AD
E
D
E
J
HK
ML
J
F
EAE
K
AA
L
BAM
H
F
E
AF

10
LC-37HV4EB, AN-37U4-B
AN-37L4-T, AN37W4K
654321
A
B
C
D
E
F
G
H
CABINET AND MECHANICAL PARTS (Display)
3-1
60
3
1
5
62
37
3-5 3-3 3-6
5-5
5-21 5-22
5-18 5-19
5-19 5-20
5-27 5-24
5-14 5-15 5-13
5-12
5-27
5-26
5-6
5-6
5-25
5-18
5-24
3-4
1-2
1-6
1-1
1-8
1-4
1-7
1-3
1-6
5-23
5-16
5-1
1-7
3-7
3-2
5-4
5-3
5-5
5-11
5-10
5-2
2-7
8
54
9
57
55
56
63
65
5-8
5-9
2-3
2-8
2-8
2-2
2-1
5-9
5-8
5-25
5-26
2-5
2-4
68 44
42
51
38
43
2-6
4-6
4-2
4-3
4-5
4-1
4-4
66
17
13
4
29
66
68
7
7-2
7-1
64
47
48
41
24 25
68
46
28
18
59
11
19
34
66 45
67
64
35
23
40
14
2-9
5-7
1-5
5-17
5-17
5-17
5-17
5-17
12
16
27 2
10
68 66
68
66
68
50
6
32
6-2
6-1
33
68
36 61
23
39
30
49
13
31
15
67
53
26
4-7
4-8 4-9
4-12
4-10
4-13
4-11
A
A
22
20
69
21
20
69