Sharp LC-70LE741E (serv.man2) Service Manual ▷ View online
LC-60/70LE740E/RU,741E/S,743E,60LE840E/RU,841E/S,843E,80LE645E/RU,646E/S,648E
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LCD control Unit (Side-B)
LC-60/70LE740E/RU,741E/S,743E,60LE840E/RU,841E/S,843E,80LE645E/RU,646E/S,648E
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LCD control Unit
(Chip Parts Side-B)
LC-60/70LE740E/RU,741E/S,743E,60LE840E/RU,841E/S,843E,80LE645E/RU,646E/S,648E
2 – 1
LC60LE740E
Service Manual
CHAPTER 2.
SCHEMATIC DIAGRAM
[1] DESCRIPTION OF SCHEMATIC DIAGRAM
1. VOLTAGE MEASUREMENT CONDITION:
1) The voltages at test points are measured on exclusive AC adaptor and the stable supply voltage of AC 220-240 V. Signals are fed by a color bar signal generator for servicing purpose and the above voltages are measured with a 20k ohm/V tester.
2. INDICATION OF RESISTOR & CAPACITOR:
RESISTOR
1) The unit of resistance "
Ω" is omitted.
(K=k
Ω=1000Ω, M=MΩ).
2) All resistors are ± 5%, unless otherwise noted.
(K= ± 10%, F= ± 1%, D= ± 0.5%)
3) All resistors are 1/16W, unless otherwise noted.
CAPACITOR
1) All capacitors are
µF, unless otherwise noted.
(P=pF=
µµF).
2) All capacitors are 50V, unless otherwise noted.
CAUTION:
This circuit diagram is original one, therefore there may be a slight
difference from yours.
This circuit diagram is original one, therefore there may be a slight
difference from yours.
SAFETY NOTES:
1) DISCONNECT THE AC PLUG FROM THE AC OUTLET
1) DISCONNECT THE AC PLUG FROM THE AC OUTLET
BEFORE REPLACING PARTS.
2) SEMICONDUCTOR HEAT SINKS SHOULD BE REGARDED AS
POTENTIAL SHOCK HAZARDS WHEN THE CHASSIS IS
OPERATING.
OPERATING.
IMPORTANT SAFETY NOTICE:
PARTS MARKED WITH "
PARTS MARKED WITH "
" (
) ARE IMPORTANT
FOR MAINTAINING THE SAFETY OF THE SET. BE SURE TO
REPLACE THESE PARTS WITH SPECIFIED ONES FOR MAIN-
TAINING THE SAFETY AND PERFORMANCE OF THE SET.
REPLACE THESE PARTS WITH SPECIFIED ONES FOR MAIN-
TAINING THE SAFETY AND PERFORMANCE OF THE SET.
AVIS DE SECURITE IMPORTANT:
LES PIECES MARQUEES "
" (
) SONT IMPOR-
TANTES POUR MAINTENIR LA SECURITE DE L'APPAREIL.
NE REMPLACER CES PIEDES QUE PAR DES PIECES DONT LE
NUMERO EST SPECIFIE POUR MAINTENIR LA SECURITE ET
PROTEGER LE BON FONCTIONNEMENT DE L'APPAREIL.
NE REMPLACER CES PIEDES QUE PAR DES PIECES DONT LE
NUMERO EST SPECIFIE POUR MAINTENIR LA SECURITE ET
PROTEGER LE BON FONCTIONNEMENT DE L'APPAREIL.
LC-60/70LE740E/RU,741E/S,743E,60LE840E/RU,841E/S,843E,80LE645E/RU,646E/S,648E
2 – 2
[2] SCHEMATIC DIAGRAM
1. MAIN Unit (DKEYDF733FM62/63/64)
1
2
3
10
9
7
6
5
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A
B
C
D
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17
NAIN Unit-1 (DKEYDF733FM62/64)
T S_ TU OU T_ S Y NC
L NB _S HO RT
S 2_ D 2
S 2_ D 5
S 2_ D 6
S 2_ D 3
S 2_ S Y NC
S 2_ D 1
S 2_ VA L
S 2_ CL K
S 2_ D 0
S 2_ D 7
T S_ TU OU T_ D 7
T S_ TU OU T_ D 6
T S_ TU OU T_ D 5
T S_ TU OU T_ D 4
T S_ TU OU T_ D 3
T S_ TU OU T_ D 2
T S_ TU OU T_ D 1
T S_ TU OU T_ D 0
T S_ TU OU T_ CL K
T S_ TU OU T_ VA L
N _T UN _R ST
N _T UN _R ST
S AT _S CL
S AT _S DA
N _T UN _S AT _R ST
T UN _ A IF +/C V BS
T UN _ A IF -/S IF
S 2_ D 4
S2
_
C
L
K
S2
_
S
Y
N
C
S2
_
V
A
L
S2
_
D
0
S2
_
D
1
S2
_
D
2
S2
_
D
3
S2
_
D
4
S2
_
D
5
S2
_
D
6
S2
_
D
7
IF_ _ AG C
N _T UN _S AT _R ST
D _ IF +
N IM_T S S YN C
N IM_T SD AT A
N IM_T SC LK
T U_ S C L
T U_ S D A
T U_ S IF
IF_ _ AG C
IF_ _ _ AG C
T U_ AIF+/C VB S
T UN _ A IF +/C V BS
D _ IF -
D _ IF +
D _ _ IF +
N _T UN _R ST
TU
/S
A
T
_
S
C
L
T2
_
T
S
_C
LK
T2
_
T
S
_
D
1
T2
_
T
S
_
D
3
T2
_
T
S
_
D
5
T2
_
T
S
_
D
7
N_
T
U
N_
R
E
S
ET
T2
_
T
S
_E
R
R
T2
_
T
S
_
D
6
T2
_
T
S
_
D
4
T2
_
T
S
_
D
2
T2
_
T
S
_
D
0
T2
_
T
S
_V
A
L
_H
S
S
TU
/S
A
T
_
S
D
A
S 2_ TS _ D 7
S 2_ TS _ D 6
S 2_ TS _ D 5
S 2_ TS _ D 4
S 2_ TS _ D 3
S 2_ TS _ D 2
S 2_ TS _ D 1
S 2_ TS _ D 0
S 2_ TS _C LK
S 2_ TS _V AL _H S S
S 2_ TS _S YN C_ HS S
L B+3. 3V
LB
+
3
.3
V
LN
B
L NB
T U_ S C LK
T
2_
T
S_
SY
N
C
_
H
SS
S AT _S CL K
S AT _S DA TA
DI
S
EQ
C
_O
U
T
SA
T
_SD
A
T
A
S2
_
T
S_
E
R
R
S2
_
T
S_
V
A
L
_H
S
S
S2
_
T
S
_
D
0
S2
_
T
S
_
D
2
S2
_
T
S
_
D
4
S2
_
T
S
_
D
6
S2
_
T
S
_
D
5
S2
_
T
S
_
D
7
LN
B
_C
TR
L_
1
S2
_
R
ESE
T
DI
S
EQ
C
_I
N
SA
T
_SC
L
K
S2
_
T
S_
SY
N
C
_
H
SS
S2
_
T
S_
C
LK
S2
_
T
S
_
D
1
S2
_
T
S
_
D
3
TU
_
S
C
LK
TU
_
S
D
A
TA
N_
T
U
_
R
E
S
ET
TU
_
G
A
IN
_S
W
IF
___A
G
C
D__I
F
+
D__I
F
-
TU
_
A
IF
+
/C
V
B
S
TU
_
A
IF
-/
S
IF
T U_ AIF-/S IF
D _ _ IF -
T U_ S D AT A
U R +13V
S AT +1.2V
SA
T
+1
.2
V
S AT +3.3V
SA
T
+3
.3
V
T UN E R _C VB S_ BY PA S S
S AT _S DA
L NB _C TR L_ 0
L NB _C TR L_ _ 0
L NB _C TR L_ 1
L NB _C TR L_ _ 1
D IS EQ C_ IN
D IS EQ C_ OU T
D _ IF -
LN
B
_C
TR
L_
0
T UN E R _C VB S
T U_ CV BS
S AT _S CL
IF+3. 3V
IF
+
3
.3
V
IF
+
1
.8
V
IF+1. 8V
N _T U_ R E S ET
S 2_ R E S ET
N _T UN _R E S ET
N IM_T SV AL
D +3.3V
T U_ S C L
T U_ S D A
T
S
_
T
UO
UT
_
D
7
T
S
_
T
UO
UT
_
D
3
T
S
_
T
UO
UT
_
D
4
T
S
_
T
UO
UT
_
D
1
T
S
_
T
UO
UT
_
D
2
T
S
_
T
UO
UT
_
C
L
K
T
S
_
T
UO
UT
_
D
0
T
S
_
T
UO
UT
_
S
Y
N
C
T
S
_
T
UO
UT
_
V
A
L
T
S
_
T
UO
UT
_
D
6
T
S
_
T
UO
UT
_
D
5
AT
+
5
V
A T+5V
D +5.6V
010
D +3.3V
010
*C 1106
33P
*C 1108
33P
*C 1105
1000P
*Q 1103
R T1N141U
C 1110
0.01u
25V
25V
*C 1153
0.01u
25V
*R 1119
10
*C 1145
10u
16V
K ZA237WJ
*R 1112
10K
*R 1121
390
*R 1117
10K
*R 1118
10K
*C 1141
10u
16V
K ZA237WJ
*Q 1106
IS A1530AC
*C 1138
0.1u
K
10V
*R 1113
10K
D +5V
010
T UN E R _C VB S_ BY PA S S
002
T UN E R _C VB S
004
S IF
004
A NT +5V_ S W
007
L NB _S HO RT
007
S AT _S CL
011
S AT _S DA
011
N _T UN _R ST
004
T S_ TU OU T_ D 0
011
T S_ TU OU T_ VA L
011
T S_ TU OU T_ S Y NC
011
T S_ TU OU T_ CL K
011
*R 1135
0
*C 1161
0.1u
10V
K
T S_ TU OU T_ D 4
011
T S_ TU OU T_ D 5
011
T S_ TU OU T_ D 3
011
T S_ TU OU T_ D 1
011
T S_ TU OU T_ D 6
011
T S_ TU OU T_ D 7
011
T S_ TU OU T_ D 2
011
*C 1173
10u
16V
K ZA237WJ
*R 1144
100
*R 1143
100
*F B 1103
A192WJ
T L1106
*T L1111
*T L1105
T L1108
*T L1113
T L1103
T L1109
*T L1114
*T L1104
*T L1110
*T L1146
*T L1137
*T L1134
*T L1143
*T L1140
*T L1149
*T L1147
*T L1138
*T L1132
*T L1135
*T L1144
*T L1141
*T L1148
*T L1139
*T L1133
*T L1136
*T L1145
*T L1142
*T L1112
T L1107
*T L1151
*T L1152
T L1101
*R 1131
100
*R 1129
100
*R 1133
3.3
1/4W
T Q
*R 1122
10K
*R 1128
100
*C 1116
0.22u
25V
K ZA709WJ QZ
*C 1115
10u
25V
25V
K ZA383WJ
*D1102
1S R 154
1S R 154
V HD
*C 1107
68u
25V
A S H
*C 1117
0.22u
25V
K ZA709WJ QZ
22uH
*L 1101
C IL
P B016WJ QZ
*F B 1101
A192WJ
A192WJ
*L 1102
220uH
P B227WJ QZ
*C 1113
0.22u
25V
K ZA709WJ QZ
*R 1108
0
*D1103
R B156L40
V HD
*C 1104
1u
25V
K ZA621WJ QZ
*R 1111
10K
*R 1134
15
C Z
*C 1111
68u
25V
A S H
*D1101
R B156L40
V HD
*D1104
R B156L40
V HD
*R 1105
2.2K
*C 1120
0.01u
C ZB
25V
*C 1101
8200P
25V
*C 1102
0.01u
25V
*C 1119
10u
25V
K ZA383WJ
*C 1114
1u
25V
K ZA621WJ QZ
*R 1126
15K
*R 1127
0
IXC 563WJ QZ
LN BH23P P R
I2
C
a
dr
e
s
s
:1
6
H
1
D E T IN
2
V CT RL
3
N C
4
N C
5
N C
6
L X
7
P -G ND
8
S DA
9
S CL
10
AD D R
11
D S Q O UT
12
D S Q IN
13
E X TM
14
T T X
15
B YP
16
V C C -L
17
V CC
18
A -G ND
19
V oR X
20
V oT X
21
N C
22
V UP
23
IS E L
24
N C
*R 1110
2.2K
2.2K
*R 1120
10K
U R +13V
010
*R 1138
22
V RK
1
2
3
4
5
6
7
8
*R 1136
22
V RK
1
2
3
4
5
6
7
8
*R 1137
22
V RK
1
2
3
4
5
6
7
8
T U_ S D A
011
T U_ S C L
011
R 1101
1K
*R 1109
0
*R 1132
0
C PU _A TV _IFP
004
C PU _A TV _IFN
004
*R 1150
0
*R 1149
0
*R 1151
10K
*C 1123
0.047u
N _T UN _S AT _R ST
004
*C 1125
0.047u
0.047u
10V
*R 1159
10K
D VB _IF_ AG C
011
*R 1157
0
*R 1155
0
D VB _IFP
011
D VB _IFN
011
*R 1154
0
T UN _G AIN_ S W
004
N IM_T SD AT A
004
N IM_T SV AL
004
N IM_T SS YN C
004
N IM_T SC LK
004
M+1.8V
010
S CL 0_400k
006
T P1112
S DA 0_400k
006
T P1110
T P1111
N IM_R ST
004
S 172B12E
1
V out
2
G ND
3
O N
4
N C
5
G ND
6
V in
*R 1162
0
10uH
*L 1104
C EM
*C 1112
10u
16V
16V
K ZA237WJ
*C 1128
10u
16V
K ZA237WJ
*C 1127
10u
16V
K ZA237WJ
10uH
L1107
C EM
10uH
*L 1103
C EM
*C 1130
10u
16V
16V
K ZA237WJ
*C 1129
10u
16V
16V
K ZA237WJ
*R 1177
100
*Q 1102
2S C 3928AR
*R 1176
330
330
*C 1178
0.01u
25V
25V
*C 1181
0.01u
0.01u
25V
*C 1182
0.01u
25V
*R 1179
0
*R 1178
0
*R 1184
10K
*R 1181
2.2K
*R 1182
2.2K
*R 1183
22K
*R 1180
150K
*C 1183
0.01u
25V
*R 1185
0
V RK
1
2
3
4
5
6
7
8
*R 1186
0
V RK
1
2
3
4
5
6
7
8
*R 1187
0
V RK
1
2
3
4
5
6
7
8
*R 1191
0
*C 1184
0.01u
25V
C 1185
0.01u
25V
0.01u
25V
*D1105
R B156L40
V HD
*R 1195
100K
*C 1189
0.1u
C YB
*F B 1104
A192WJ
*R 1196
2.2K
*R 1197
2.2K
*C 1190
0.01u
25V
*R 1201
0
*R 1202
0
*Q 1108
2S C 3928AR
*C 1188
1000P
*R 1142
10
2
13
4
*T L1154
*R 1203
0
*R 1204
0
*R 1205
0
*R 1206
0
*R 1207
0
*T U1102
W A029WJ QZ
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
NC
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
57
58
S 132B50M
1
V in
2
G ND
3
O N
4
N .C
5
V out
*R 1210
0
S 170B18U
1
O N
2
G ND
3
N .C
4
V in
5
V out
R 1211
2.2
T WF
1/2W
C 1195
4.7u
10V
10V
K ZA761WJ QZ
C 1196
4.7u
10V
K ZA761WJ QZ
4.7u
10V
K ZA761WJ QZ
C 1124
0.1u
*R 1212
0
*C 1200
33P
*C 1201
33P
*C 1133
0.1u
10V
*IC 1105
*IC 1102
E U
S 2-NIM/T _C-HN IM
*IC 1104
IC1109
DUN TK F733WE 62/64
3.3
0
2.6
3.2
9.0
3.8
3.2
9.0
3.8
MAIN1(T UN ER )
N e a r Tuner
N e a r Tuner
T O MAIN11(DE MOD_C I)
T O MAIN 4(CP U)
T O MAIN10(P OW ER )
T O MAIN 4(CP U)
T O MAIN 2(TAR MIN AL )
T O MAIN11(DE MOD_ CI)
T O MAIN11(DE MOD_ CI)
T O MAIN 4(CP U)
T O MAIN 6(FL AS H)
T O MAIN 7(UC OM)
T O MAIN 9(AU DIO AMP)
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