Sharp HT-SL70 (serv.man3) Service Manual ▷ View online
HT-SL70
6 – 1
CHAPTER 6. CIRCUIT SCHEMATICS AND PARTS LAYOUT
[1] Notes On Schematic Diagram
[2] Types Of Transistor And LED
•
•
•
Resistor:
To differentiate the units of resistors, such symbol as
K and M are used: the symbol K means 1000 ohm
and the symbol M means 1000 kohm and the
resistor without any symbol is ohm-type resistor.
Besides, the one with “Fusible” is a fuse type.
To differentiate the units of resistors, such symbol as
K and M are used: the symbol K means 1000 ohm
and the symbol M means 1000 kohm and the
resistor without any symbol is ohm-type resistor.
Besides, the one with “Fusible” is a fuse type.
Capacitor:
To indicate the unit of capacitor, a symbol P is used:
this symbol P means pico-farad and the unit of the
capacitor without such a symbol is microfarad. As to
electrolytic capacitor, the expression “capacitance/
withstand voltage” is used.
(CH), (TH), (RH), (UJ): Temperature compensation
(ML): Mylar type
(P.P.): Polypropylene type
To indicate the unit of capacitor, a symbol P is used:
this symbol P means pico-farad and the unit of the
capacitor without such a symbol is microfarad. As to
electrolytic capacitor, the expression “capacitance/
withstand voltage” is used.
(CH), (TH), (RH), (UJ): Temperature compensation
(ML): Mylar type
(P.P.): Polypropylene type
Schematic diagram and Wiring Side of P.W.Board
for this model are subject to change for
improvement without prior notice.
for this model are subject to change for
improvement without prior notice.
•
•
The indicated voltage in each section is the one
measured by Digital Multimeter between such a
section and the chassis with no signal given.
measured by Digital Multimeter between such a
section and the chassis with no signal given.
Parts marked with “
” are important for
maintaining the safety of the set. Be sure to replace
these parts with specified ones for maintaining the
safety and performance of the set.
these parts with specified ones for maintaining the
safety and performance of the set.
1117Y33
(1) (2) (3)
(1)(2)(3)(4)(5)
TOP VIEW
TOP VIEW
NM3421
W
E
I
V
P
O
T
W
E
I
V
P
O
T
1N4004
TOP VIEW
DXA010
KRC104S
B
(3)
E
(1)
C
(2)
HT-SL70
6 – 2
[3] Schematic Diagram
Figure 6-1: MAIN SCHEMATIC DIAGRAM
MAIN PWB-A
TO HDMI
FR
OM
S
MP
S
PWB
FR
OM
S
MP
S
PWB
TO
S
UBW
OOFER
S
Y
S
TEM
TO
S
OUNDBAR
S
Y
S
TEM
TO LED
FOR
MICOM REFLASH
ONLY
AUDIO SIGNAL
7
8
9
10
11
12
A
B
C
D
E
F
G
H
1
2
3
4
5
6
HT-SL70
6 – 4
Figure 6-3: MCU SCHEMATIC DIAGRAM
CLOSE TO PAD
TXD
RXD
RXD
5V
OP0
GND
TXD
RXD
OP0
GND
TXD
RXD
FOR
FIRMWARE
FLASH ONLY
FIRMWARE
FLASH ONLY
XOM
XIM
EPF021A_P63
EPF021A_P62
EPF021A_OP0
EPF021A_P71
EPF021A_P70
EPF021A_P70
M33D
M33D
M33D
M33D
5V
M33D
M33D
5V
5V
M33D
M33D
M33D
M33D
M33D
M33D
M33D
M33D
CEC_P3V
M33D
CEC_INTb
HT1_CTLb
CEC_RSTb
CECRX_PRG
PRG_SCL
PRG_SDA
PRG_SDA
MCU_SCL
DN_SCL
DN_SDA
DN_SDA
CLK24M1
EP91A1K_RSTb
MCU_SDA
ADC0
ADC1
ADC1
EPF021A_OP0
EPF021A_P70
EPF021A_P71
EPF021A_P71
ARC_RX_EN
ARC_MODE
IIC_SCL
IIC_SDA
P1_PWR5V
ARC_TX_EN
RESET [3]
A_MUTE
HTPLG_A
HDMI_INT
R97
1K
R88
56
DSDA1
1
R103
10K
R144
10K
R142
10K
C81
15p
C81
15p
C78>
0.1u
R122
10K
ASCL1
1
C79
0.1u
R121
10K
R515
10K
R95
1K
R104
10K
R139
10K
R114
2K
R120
10K
R115
2K
C80
0.1u
R145
10K
R517
10K
R119
10K
RP3
8P4R-10K
8P4R-10K
1
2
3
4
5
6
7
8
R140
10K
MSDA1
1
R700
4K7
R90
10K
R96
1K
Y2
24MHz
Y2
24MHz
C76
15p
C76
15p
MSCL1
1
R137
10K
R116
2K
R127
10K
R113
2K
C77>
0.1u
R92
10K
TP3
TP3
1
R138
10K
R109
10K
R91
10M
R91
10M
R516
10K
ASDA1
1
R112
10K
RP4
8P4R-10K
8P4R-10K
1
2
3
4
5
6
7
8
R98
2K
R141
10K
R107
10K
D4
BAT54H
BAT54H
D4
BAT54H
BAT54H
2
1
R110
0
R100
1K
C82
0.1u
0.1u
J8
ICP
1
1
2
2
3
3
4
4
5
5
IC4
EPF021A/0.4mm
EPF021A/0.4mm
P52
21
P54
23
S
PI
_
D
O
46
X_
IN
41
P24
52
VD
D
A
12
P13
61
P70
62
P25
53
V
SS
40
X_
O
U
T
42
opm
0
16
P01
28
P
3
5
7
VD
D
8
P11
59
P12
60
P55
24
P0
6
33
P0
7
3
4
P6
0
3
5
P6
1
3
6
P6
2
3
7
P6
3
3
8
VD
D
3
9
P04
31
P05
32
P56
25
V
SS
44
S
PI
_
C
L
K
45
P57
26
P27
55
P4
1
1
P40
64
P71
63
P10
58
TIM1
57
TIM0
56
P
33
5
P
3
2
4
P
3
4
6
P
3
0
2
AD
C
0
11
AD
C
1
10
P03
30
P02
29
P00
27
R
S
Tb
15
DM
14
DP
1
3
GND
17
P53
22
V
SS
A
9
P
3
1
3
P26
54
P23
51
P22
50
P8
[1
]
48
P21
49
P51
20
P50
19
P8
[0
]
47
P7[4]/CIR
18
VD
D
4
3
R143
10K
DSCL1
1
R106
10K
R101
0
R94
1K
R102>
10K
R99
2K
7
8
9
10
11
12
A
B
C
D
E
F
G
H
1
2
3
4
5
6
MCU Section
HDMI PWB-C
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