Read Sharp 28KF-84H (serv.man10) Service Manual online
40
28KF-84H
Page 41
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Schematic Diagram of Mother Board Unit (F7351N5)
Page 38
23
MSP3410G
1
24
6
3
-13V
8
22
10
17
+25V
9
QSOCZ2561CEZZ
21
1
+1
6
V
15
1
+3
.3
V
b
24
25
1
4
OU
T
R
-1
3
V
29
2
26
11
22
3
3
28
+1.
8
V
+5
V
4
OU
T
L
RH-I
X
1853B
MZZ
3
V
21
GN
D
2
-1
6
V
GN
D
18
QSOCZ2
5
6
1
CE
Z
Z
(Y
A
)
12
23
16
-1
6
V
2
35
7
(Y
B
)
20
2
-1
3
V
19
13
+12V
+5V
+
16V
14
25
5
3
EW
SC4INL
FI
IR
SC1OUTR
HEADL
SSC-DATA
SC4INR
LEDOPC
AGC SMPL
HEADL
OPC
SCL1
SC4INL
FB
MUTE
HEADR
PROT
SC2OUTR
SC2OUTL
SC4INR
LED
SC2INR
SDA1
RES
R IN
PROT
MUT
E
SCL1
G IN
B IN
KEY
SC2INL
RESINT
HEADR
SDA1
RES
SC1OUTL
.
.
.
.
.
.
.
D3
1
1
C8V2
EX05
5
0
B
M
D3
0
3
7V5
E
X
0549
R304
100
JF23
C3
8
7
100
n
F
C
1
044
1nF
C3
8
8
330
n
F
(FZ)
R3
4
6
1K5
R5
1
6
1K
(1%)
C3
1
0
100n
F
(25V)
C3
2
1
100nF
C3
313
1nF
HB
IC
301
T
D
A
7480
1 2 3
4 5
6 7 8
9 10
20 19 18
17 16
15 14 13
12 11
IC
3
0
2
T
D
A
7480
1 2 3
4 5
6 7 8
9 10
20 19 18
17 16
15 14 13
12 11
Q30
6
BC857B
VSBC857B
Q61
4
BC847B
VSBC847B
C3
7
3
100
n
F
(25V)
C503
100
p
F
R3
5
3
150
C
1
046
100pF
R5
0
2
4K7
(1%)
R5
1
0
8K2
C10
4
5
100pF
D3
0
4
7V5
E
X
0549
3
83
n
F
Q30
8
BC847B
VSBC847B
Q50
2
2SA1905Y
2SA1905Y
C505
100
n
F
(25V)
C3
5
8
100
n
F
(25V)
C3
5
6
330
n
F
(FZ)
C3
0
1
10
u
F
R3
0
2
100
C384 1nF
R3
3
0
10
Q3
0
7
BC847B
VSBC847B
R5
0
3
1K
(1%)
L315
3
.3uH
(C
F)
D305 7V5
E
X
0549
R339 220
R3
4
5
2K2
C3
7
2
0.47
u
F
.
.
.
.
.
R3
0
8
100
C3
5
1
220u
F
(25V)
R3
5
8
100K
C3
7
5
560
p
F
(HB)
C5
2
6
1000uF
(25V)
C3
0
3
10
u
F
(16V)
R7
3
8
150
(1/2W)
C3
8
5
220
n
F
L318
22uH
(CF)
L319
22uH
(CF)
R3
8
9
10K
R3
5
1
27K
C362
0.47uF
C3
0
5
1nF
HB
R3
6
2
22K
D3
0
6
DX00
4
5
R6
6
4
270
R5
5
5
4R7
(1/2W)
XZ0208
B
M
R3
6
0
10K
C369 100
p
F
L501 P
0
271
C5
0
2
100
n
F
(25V)
L351
3.
3
u
H
(C
F)
R5
5
3
1.2
(1/3W
)
XZ0101
B
M
C3
0
2
10
u
F
D3
1
0
1N4148
DX0551
R6
3
0
6K2
C10
3
1
330
u
F
(6.3V)
R3
5
6
10K
R518 1.5
(2W)
C5
0
8
560
p
F
(HB)
R501
150
2W
C3
6
0
560
p
F
(HB)
R3
1
1
100K
C3
1
7
330n
F
(FZ)
IC304
M5218L
VHIM521
8
L
+12V
8
OUT
L
7
-IN
L
6
+INL
5
GND
4
+INR
3
-IN
R
2
OUT
R
1
JF
4
0
R3
4
4
2K2
C378
220
u
F
(25V)
C3
1
1
10u
F
(16V)
R6
6
5
10K
R3
5
7
150
C5
0
4
220nF
(FZ)
R309
100
C3
6
6
100
n
F
(25V)
.
.
.
.
.
R5
1
1
150
(T
Q
)
R3
1
0
100K
R338 220
JF
1
1
0
C3
0
8
3.3
u
F
C3
2
0
10
u
F
(16V)
R3
7
5
12K
L316
3.3
u
H
(C
F
)
C3
5
0
100
n
F
(25V)
C3
5
2
100
n
F
(FZ)
C534 1nF
HB
D3
0
2
7V5
E
X
0549
R3
8
7
IC
303
64
NC
63
AVSS
62
AVSS
61
MO
N
O
60
NC
59
VR
E
F
T
O
P
58
S
C
1_I
N_R
57
SC
1
_
IN
_
L
56
ASG1
55
S
C
2_I
N_R
54
SC
2
_
IN
_
L
53
ASG2
52
S
C
3_I
N_R
51
SC
3
_
IN
_
L
50
ASG4
49
S
C
4_I
N_R
48
CAP
L_M
40
AHVSU
P
39
CAP
L_A
38
SC1
_O
UT
_L
37
SC
1_OUT
_R
36
VREF
1
35
SC2
_O
UT
_L
34
SC
2_OUT
_R
33
ASG3
32
NC
31
DACM_S
UB
30
NC
29
DACM
_L
28
DACM_R
27
VREF
2
26
DAC_L
25
DAC_R
24
I2S_DA_IN2
17
DVSS
16
DVSS
15
DVSUP
13
DVSUP
12
DVSUP
11
ADR_CL
10
ADR_WS
9
ADR_DA
8
I2S_DA_IN1
7
I2S_DA_OUT
6
I2S_WS
5
I2S_CL
4
I2C_DA
3
I2C_CL
2
1
YQ
L
OUT0
OUT1
_OU
T
UT
2+
+
SC
4
_
IN
_
L
47
NC
46
A
G
NDC
45
AHVSS
44
AHVSS
43
NC
42
NC
41
NC
18
NC
19
NC
20
RESETQ
21
NC
22
NC
23
DVSS
14
C3
7
0
330
n
F
(FZ)
C3
6
8
100
n
F
(25V)
C6
1
9
FB
5
0
1
LN0091GE
C3
5
3
100
n
F
(25V)
R3
0
1
100
R3
0
5
100K
D3
0
7
C8V2
EX05
5
0
B
M
R3
3
2
2K7
C3
8
9
330
n
F
(FZ)
C363
220
u
F
(25V)
.
.
.
.
.
R3
8
0
22K
R3
8
5
1M
Q50
5
BC857B
VSBC857B
C3
7
6
470n
F
(FZ)
R5
0
6
1K
R3
0
6
100K
R3
0
3
100
C3
8
6
220
n
F
C3
0
9
330
u
F
(10V)
C3
0
7
100
n
F
(25V)
D5
1
1
DX0551
C3
6
7
100
n
F
(25V)
D6
4
1
DX0551
L353
680K
P0195CE
R3
5
9
100K
C3
5
9
4.7
n
F
(HB)
C3
5
4
100
p
F
C313
47
n
F
(HD)
G
N
341
C3
8
2
100
n
F
D308
C8V2
EX05
5
0
B
M
C3
1
6
330n
F
(FZ)
C304
10
u
F
(16V)
R3
3
5
100K
R3
2
8
150
C377 1uF
D5
1
2
C33
EX05
6
4
(S
)
GN0
4
4
1
C
E
D508
DX004
5
C3
6
1
470
n
F
(FZ)
C3
7
4
4.7
n
F
(HB)
.
.
.
.
.
Q30
9
BC857B
VSBC857B
R3
5
5
27K
D7
2
3
C8V2
E
X
0550
R3
5
0
2K2
D6
4
2
C47
EX05
6
8
.
.
.
.
.
R3
0
7
4K7
R3
3
4
1K
R3
7
4
12K
C306 1nF
HB
C3
5
7
1nF
HB
Q30
5
BC847B
VSBC847B
C3
6
4
100n
F
(25V)
L352
680K
P0195CE
D5
0
7
C27
EX05
6
2
R505
220
Q50
3
N06-90L
TX0
2
3
9
L302 12
u
H
(D
F)
(SS)
GN3
4
1
C3
7
1
1nF
HB
IC
501
T
D
A
7
480L
IX
1
7
8
6
1
2 3 4
5 6
7 8 9
10
R3
8
2
22K
R3
5
2
12K
C3
1
2
10
u
F
(16V)
C6
2
6
L350
3.3
u
H
(CF)
R504
1K
C5
0
7
4.7
n
F
(HB)
C3
6
5
220u
F
(25V)
R3
3
7
10
(RA)
R3
3
6
100K
C10
4
3
1nF
C3
2
8
100
n
F
(25V)
R3
8
4
22K
C3
7
9
100n
F
(25V)
R6
2
9
470K
R3
91
100
R3
90
100
L303 12uH
(D
F)
R3
4
7
33K
F
B
305
0
FB
3
0
4
LN0091G
E
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