Sharp TU-GAT Service Manual

TU-GAT

SERVICE MANUAL

S25E8TU-GAT//

LCD COLOUR TELEVISION

(AVC System)

MODEL

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.

OUTLINE

This model is based on the TU-GA1U-S and is changed some parts. This Service Manual covers the
modifications alone. For the other points, refer to the TU-GA1U-S Service Manual.

CONTENTS

» LIST OF CHANGED PARTS..........................................................................................................................2

» IMPORTANT SERVICE SAFETY PRECAUTION.......................................................................................3

» SPECIFICATIONS ......................................................................................................................................5

» PARTS LIST................................................................................................................................................6

» PACKING OF THE SET ............................................................................................................................10

TU-GAT

Page

SHARP CORPORATION

TU-GAT

LIST OF CHANGED PARTS

TU-GA1U-S → TU-GAT

Ref.No. Description TU-GA1U-S TU-GAT Note

PWB ASSEMBLIES

AV SUB Unit DUNTKC259FE05 
TMDS TX Unit DUNTKC261FE05 
PC CARD Unit DUNTKC266FE02 
DVI Unit DUNTKC267FE15 
CPU Unit DUNTKC427FE12 
FRONT Unit DUNTKC483DE02 
AUDIO-I/F Unit DUNTKC484DE02 
MAIN Unit DUNTKC619FE05 
AV Unit DUNTKC663FE01 
POWER Unit RDENCA064WJN1 
DC/DC CONVERTER Unit RDENCA074WJN1 
1BIT AMP. Unit B2SX4102BT 

CABINET AND MECHANICAL PARTS
Please refer to a Parts list. (Some Parts Changed)

PACKING PARTS AND ACCESSORIES
Please refer to a Parts list. (Some Parts Changed)

2

TU-GAT

2

2

2

2

IMPORTANT SERVICE SAFETY PRECA UTION

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:

WARNING

1. For continued safety, no modification of any circuit
should be attempted.

2. Disconnect AC power before servicing.

CAUTION: FOR CONTINUED
PROTECTION AGAINST A RISK OF
FIRE REPLACE ONLY WITH SAME

A V

TYPE FUSE.
F701 (2A, 250V), F702 (1A, 250V)

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 volt AC outlet.
» Using two clip leads, connect a 1.5k 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 A C 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 0.75 Vrms (this corresponds to 0.5
mA rms AC.) or more is excessive and indicates a
potential shock hazard which must be corrected
before returning the monitor to the owner.

DVM

AC SCALE

1.5k ohm
10W

0.15 µF

TEST PROBE

TO EXPOSED
METAL PARTS

CONNECT TO
KNOWN EARTH
GROUND

234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121

234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121

SAFETY NOTICE

Many electrical and mechanical parts in LCD color
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"

234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121

234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121

and shaded areas in the

Replacement Parts List

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.

3

and

TU-GAT

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:

L Fa

Indicates lead-free solder of tin, silver and copper.

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 ho w 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 y ou 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.

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

4

SPECIFICATIONS

TU-GAT

Item

Terminals

OSD language English/French/Spanish
Power Requirement

Power Consumption

Weight
Accessories Remote control unit ( × 1), System cable ( × 1), AC cord ( × 1),

Rear INPUT 1

INPUT 2
INPUT 4
INPUT 5 Audio in, DVI-I in
ANTENNA
Monitor Out S-VIDEO out, AV out

CENTER
CHANNEL
INPUT

Front

INPUT 3 S-VIDEO in, AV in
Headphones

TU-GAT (AVC System)

AV in, COMPONENT in
AV in, COMPONENT in
HDMI in

Ω Unbalance, F T

75

4 Ω 10W (L/R)SPEAKER-B

RCA pin

Ø 3.5mm jack

AC 110 V, 50/60 Hz
48W (0.4W Standby with AC 110 V)

14.8 lbs./6.7 kg (w/o stand), 15.2 lbs./6.9 kg (with stand)

"AAA" size battery ( × 2), AVC system stand unit ( × 1), RF cable ( × 1)

ype for VHF/UHF/CATV in

m 2, out m

1

Specifications are subject to change without prior notice.

5

TU-GAT

Ref. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code

PARTS LIST

PARTS REPLACEMENT

Replacement parts which have these special safety characteristics
identified in this manual; electrical components having such f eatures
are identified by å and shaded areas in the Replacement P arts Lists
and Schematic Diagrams. The use of a substitute replacement part
which dose no have the same safety characteristic as the factory
recommended replacement parts shown in this service manual may
create shock, fire or other hazards.

"HOW TO 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

★ MARK: SPARE PARTS-DELIVERY SECTION

Ref. No. Part No. ★ Description Code

PRINTED WIRING BOARD ASSEMBLIES

(NOT REPLACEMENT ITEM)

DUNTKC259FE05 – AV SUB Unit —
DUNTKC261FE05 – TMDS TX Unit —
DUNTKC266FE02 J PC CARD Unit BZ
DUNTKC267FE15 – DVI Unit —
DUNTKC427FE12 – CPU Unit —
DUNTKC483DE02 – FRONT Unit —
DUNTKC484DE02 – AUDIO-I/F Unit —
DUNTKC619FE05 J MAIN Unit CR
DUNTKC663FE01 – AV Unit —
RDENCA064WJN1 – POWER Unit —
RDENCA074WJN1 – DC/DC CONVERTER Unit —
B2SX4102BT J 1BIT AMP. Unit BL

6

TU-GAT

Ref. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code

26 NFANR0126CEZZ J Cooling Fan(L) AT

CABINET AND MECHANICAL PARTS

1 CANGTA128WJ03 J Rear Panel Ass’y AT
1-1
1-2 HiNDPB283WJSA J Indication Label AN
1-3 QEARZA020WJFW J Earth Spring, x2 AC

2 CCABAA469WJ02 J Chassis Frame Ass’y BB
2-1
2-2 LHLDW1121GEZZ J Wire Holder, x2 AB
2-3 LHLDWA023WJKZ J Wire Holder, x1 AC
2-4 LHLDWA032WJZZ J Wire Holder, x1 AD
2-5 QEARZA031WJFW J Earth Spring, x1 AF
2-6 XJPSN30P08XS0 J Screw, x2 AA

3 CCABBA334WJ17 J Bottom Cabinet Ass’y AY
3-1
3-2 GLEGGA034WJZZ J Rubber Leg, x4 AD
3-3 TLABMB494WJZZ J Model Label AE

4 CCABBA407WJ07 J Top Cabinet Ass’y AX
4-1
4-2 TCAUHA071WJZZ J Caution Label AE

5 CHLDZA240WJ01 J Fan Holder Ass’y AH
5-1
5-2 PSPAGA133WJZZ J Spacer, x4 AB

6 CHLDZA306WJ01 J Fan Holder Ass’y AH
6-1

7 CPNLCA122WJ06 J Front Panel Ass’y BF
7-1
7-2 GCOVAA638WJSB J B-CAS Card Cover AK
7-3 GDORFA091WJSA J Door AY
7-4 HDECQA333WJSA J LED Decoration Cover AF
7-5 HiNDPA758WJSB J PC CARD Indication Label AE
7-6 HiNDPA832WJSA J Terminal Indication Label AF
7-7 JBTN-A252WJKB J Power Button AH
7-8 LANGTA121WJFW J Hinge Angle, x2 AC
7-9 LHLDZ3057GEZZ J Magnet Catch, x2 AE
7-10 LHLDZA323WJSA J Hinge Fixed Holder, x3 AL
7-11 MHNG-1072CEZZ J Hinge, x3 AH
7-12 PSPAGA191WJZZ J Spacer, x2 AB
7-13 PSPAZ0457CESA J Spacer, x1 AA
7-15 XEBSN30P08000 J Screw, x6 AA

8 CSLDMA325WJ01 J Radiating Shield Ass’y AQ
8-1
8-2 PRDARA103WJFW J Heat Sink-A AG
8-3 PRDARA104WJFW J Heat Sink-B AF

Not Available

Not Available

Not Available

Not Available

Not Available

Not Available

PSPAGA133WJZZ J Spacer, x4 AB

Not Available

Not Available

– Rear Panel —

– Chassis Frame —

– Bottom Cabinet —

– Top Cabinet —

– Fan Holder —

– Fan Holder —

– Front Panel —

– Radiating Shield —

27 NSFTZ0134CEFW J Shaft Screw, x6 AD
28 PSLDMA303WJFW J Front Shield AL
29 PSLDMA324WJFW J TMDS Shield AG
30 PSLDMA342WJFW J PC Card Shield AF
31 PSLDMA425WJFW J RCA Shield AD
32 PSLDMA404WJFW J DVI Shield AF
33 DUNTKC259FE05 – AV SUB Unit —
34 DUNTKC261FE05 – TMDS TX Unit —
35 DUNTKC266FE02 J PC CARD Unit BZ
36 DUNTKC267FE05 – DVI Unit —
37 DUNTKC427FE02 – CPU Unit —
38 DUNTKC483DE02 – FRONT Unit —
39 DUNTKC484DE02 – AUDIO-I/F Unit —
40 DUNTKC619FE05 J MAIN Unit CR
41 DUNTKC663FE01 – AV Unit —
42 RDENCA064WJN1 – POWER Unit —
43 RDENCA074WJN1 – DC/DC CONVERTER Unit —
44 B2SX4102BT J 1BIT AMP. Unit BL
45 QCNW-C598WJPZ J Connecting Cord AQ
46 QCNW-C033WJQZ J Connecting Cord AF
47 QCNW-C036WJQZ J Connecting Cord AU
48 QCNW-C026WJQZ J Connecting Cord AH
49 QCNW-C030WJPZ J Connecting Cord AF
50 QCNW-C011WJPZ J Connecting Cord AS
51 QCNW-C014WJQZ J Connecting Cord AG
52 QCNW-C018WJPZ J Connecting Cord AR
53 QCNW-C023WJQZ J Connecting Cord AE
54 QCNW-C024WJQZ J Connecting Cord AK
55 QCNW-C025WJQZ J Connecting Cord AQ
56 QCNW-C031WJQZ J Connecting Cord AL
57 QCNW-C034WJQZ J Connecting Cord AG
58 QCNW-C035WJQZ J Connecting Cord AE
59 QCNW-C041WJQZ J Connecting Cord AN
60 QCNW-C523WJQZ J Connecting Cord AM
61 QCNW-C524WJQZ J Connecting Cord AN
62
63 QEARBA009WJFW J Earth Spring, x1 AG
64 QEARZ0056CEFW J Earth Spring, x4 AC
65 XBPSN30P06000 J Screw, x4 AA
66 XEBSN26P06000 J Screw, x1 AA
67 XEBSN30P08000 J Screw, x4 AA
68 XJPSN30P08XS0 J Screw, x70 AA
69 LANGTA110WJFW J TMDS PWB Angle AP
70 LHLDWA023WJKZ J Wire Holder, x1 AC
71 LHLDW1121GEZZ J Wire Holder, x1 AB
72 LANGTA116WJN1 J DVI PWB Angle AN
73 LHLDWA035WJZZ J Wire Holder, x1 AC
74 LANGTA109WJN1 J AV PWB Angle AP
75 LHLDFA021WJZZ J Wire Holder, x1 AC
76 LHLDW1090GEZZ J Wire Holder, x2 AB

Not Available

– Serial No. Label —

9 CANGTA118WJ01 J Tuner Angle Ass’y AQ
9-1
9-2 PSPAHA328WJZZ J Spacer AC
9-3 QEARZA058WJZZ J Gasket, x2 AH

10 GCOVAA624WJKB J Side Cover(L) AN
11 GCOVAA625WJKB J Side Cover(R) AN
12 GCOVAA678WJKA J SD Cover AE
14 LANGFA094WJFW J MAIN PWB Angle AL
15 LANGTA111WJN1 J CARD PWB Angle AQ
16 LBSHZA003WJZZ J Fan Bush, x8 AD
17 LHLDW1009CEZZ J Wire Holder, x1 AA
18 LHLDW1046CEZZ J Wire Holder, x1 AA
19 LHLDW1060CEZZ J Wire Holder, x1 AB
20 LHLDW1081GEZZ J Wire Holder, x2 AB
21 LHLDW1090GEZZ J Wire Holder, x1 AB
22 LHLDWA038WJZZ J Wire Holder, x1 AC
23 LX-BZ3434CEFN J Screw, x2 AB
24 LX-NZ3047GEZZ J Tuner Nut, x3 AA
25 NFANR0120CEZZ J Cooling Fan(S) AU

Not Available

– Tuner Angle —

7

TU-GAT

Ref. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code

CABINET AND MECHANICAL PARTS

M

3-3

68

4-1

4-2

23

1-1

1

1-3

N

M

N

O

58

O

L

50

D

G

F

A

16

m

6

6-2

a

2-5

r

62

6-1

68

2-1

46

E

19

G

F

20

8

2-2

2-3

10

68

65

68

27

g

48

60

64

68

M

41

U

68

74

m

61

e

f

H

I

j

5

68

68

66

67

24

1-2

K

a

V

J

g

68

W

A

Y

51

c

53

L

S

T

F

B

G

C

5-1

5-2

68

11

9

9-2

9-1

33

31

9-3

R

d

21

N

d

40

16

68

G

b

F

57

68

R

44

68

12

37

68

14

b

H

29

68

e

Q

Z

G

43

63

F

E

D

E

P

C

B

H

68

i

M

P

Z

Q

42

D

68

C

15

7

7-1

f

68

I

18

71

L

69

K

N

h

68

30

68

7-15

7-7

B

7-12

7-9

7-6

7-2

7-13

A

7-5

68

68

j

34

68

O

70

68

39

68

JU

68

54

H

I

H

22

7-4

I

c

JU

35

21

r

A

28

68

7-15

68

7-15

7-9
7-8
7-3

73

32

4

S

A

52

2-4

7-12

T

72

V

U

Y

Y

V

D

C

B

S

2

2-6

j

i

68

7-15

7-11

3-1

36

56

J

18

38

7-10

j

49

W

g

L

47

55

C

B

45

T

S

T

3-2

26

64

h

68

3

654321

8

TU-GAT

Ref. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code

SUPPLIED ACCESSORIES

X1 GDAi-A104WJSB J Stand(for AVC System) AX
X2 PSPAHA314WJZZ J Stand Spacer, x4 AC
X3 GLEGGA013WJZZ J Stand Cushion, x4 AC
X4 XBPSN50P16JS0 J Stand Screw, x2 AB

å X5 QACCZA047WJPZ J AC Cord AT

X6 QCNWGA061WJZZ J RF Cable AL
X7 QCNW-B856WJZZ J System Cable BE
X8 RRMCGA263WJSA J Remote Control Unit BC
X9 SPAKPA321WJZZ J Wrapping Paper for Stand AD
X10 SSAKAA028WJZZ J Polyethylene Bag for Screw AB
X11 SSAKA0170CEZZ J Polyethylene Bag for Cable AB
X12 TLABHA072WJZZ J Label AN

PACKING PARTS

(NOT REPLACEMENT ITEM)

S1 SPAKCB930WJZZ – Packing Case —
S2 SPAKFA421WJZZ – Packing Material —
S3 SPAKPA381WJZZ – Wrapping Paper —
S4 SPAKXA396WJZZ – Buffer Material —
S5 TLABK0001TAZZ – Carton Label —

SER VICE JIGS

(USE FOR SERVICING)

QCNW-C327WJQZ J Extension Cable, 10-pin AW

PC CARD-MAIN/AV(PC)

QCNW-C328WJQZ J Extension Cable, 7-pin AY

AV-AUDIO-I/F(SJ)

QCNW-C329WJQZ J Extension Cable, 15-pin AW

AV-1BIT AMP.(SA)

QCNW-C330WJQZ J Extension Cable, 8-pin AW

POWER-DC/DC(PI)

QCNW-C331WJQZ J Extension Cable, 7-pin AW

POWER-DC/DC(PJ)

QCNW-C332WJQZ J Extension Cable, 12-pin AY

AV-DC/DC(PA)

QCNW-C333WJQZ J Extension Cable, 4-pin BA

AUDIO-I/F-MAIN(SH)

QCNW-C334WJQZ J Extension Cable, 5-pin AU

TMDS-CPU(DU)

QCNW-C529WJQZ J Extension Cable, 5-pin AU

AV-TMDS(SF)

RUNTKA089WJZZ J Extension Cable, x2 CG

AV-AV SUB

Stand unit (for AVC System)

X1

X2

X3

X4

X5

X6

AC cord System cable

X7

RF cable

9

TU-GAT

Ref. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code

PACKING OF THE SET

★ S2

X8

X5

X1
X2
X3
X4

X6
X7
X9
X10
X11
X12

★ S3

★ S4

★ S5

★ S1

★ Not Replacement Item

10

TU-GAT

11

TU-GAT

COPYRIGHT © 2005 BY SHARP CORPORATION

ALL RIGHTS RESERVED.

No part of this publication may be reproduced,
stored in a retrieval system, or transmitted in
any form or by any means, electronic, mechanical,
photocopying, recording, or otherwise, without
prior written permission of the publisher.

TQ1880-S

Mar 2005 Printed in Japan

Design and Production Information

Design : Japan
Production : Japan

SY. KD

SHARP CORPORATION
AV Systems Group
Quality & Reliability Control Center
Yaita, Tochigi 329-2193, Japan