Read Sharp AR-235 (serv.man5) Service Manual online
AR-235/275 CIRCUIT DIAGRAM - 25
To debag
A19
A18
A17
A16
A15
A14
A13
A12
A11
A10
A9
A8
A7
A6
A5
A4
A3
A2
A1
Txd1
/Remote
Rxd1
D2
D12
D4
D11
D8
D13
D3
D0
D13
D6
D15
D5
D11
D14
D15
D3
D1
D8
D2
D9
D7
D12
D9
D10
D0
D14
D7
D1
D4
D5
D10
D6
12
12
12
1
2
1
2
1
2
12
18
27
36
45
1
8
27
36
45
18
27
36
45
18
27
36
45
1
8
2
7
3
6
4
5
1
8
2
7
3
6
4
5
1
8
2
7
3
6
4
5
1
8
2
7
3
6
4
5
1
8
2
7
3
6
4
5
1
8
2
7
3
6
4
5
1
8
2
7
3
6
4
5
18
27
36
45
1
8
2
7
3
6
4
5
18
27
36
45
1
2
3
4
5
1
8
2
7
3
6
4
5
1
8
2
7
3
6
4
5
1
8
2
7
3
6
4
5
1
8
2
7
3
6
4
5
12
12
12
1
8
2
7
3
6
4
5
1
2
1
2
Xin
1
Xout
2
S1
3
LF
4
VSS
5
FSOUT
6
S0
7
VDD
8
1
8
2
7
3
6
4
5
1
8
2
7
3
6
4
5
1
2
3
1
2
3
P67
33
A16
24
A8
15
TXD0
59
A0
6
D8
49
D0
40
P66
34
A17
25
A9
16
A1
7
PF7
88
PF6
90
RD
91
A10
17
A18
26
A2
8
IRQ1
37
D9
50
CS1
1
A3
9
D1
41
CS0
2
TXD1
60
A11
18
A19
27
A4
11
LWR
93
A12
20
A5
12
A20
29
TXD2
97
A6
13
IRQ0
38
D2
42
A7
14
D10
51
RXD0
61
A13
21
PA5
30
Vref
104
D3
43
A14
22
PF2
94
D11
52
A15
23
PF1
95
D4
45
RXD1
62
D5
46
P51
98
PA6
31
D12
54
PA7
32
D6
47
SCK2
101
P53
102
P34
63
D7
48
PF0
96
D13
55
P40
105
P41
106
P42
107
P43
108
P45
110
D14
56
DA0
111
D15
57
P47
112
HWR
92
P35
64
P17
115
P16
116
P15
117
P14
118
CS4
66
P61
69
P62
70
P63
71
P27
72
P26
73
P25
74
P24
75
P23
76
P22
77
P21
78
P20
79
WDTOVF
80
P13
119
P12
120
RES
81
NMI
82
STBY
83
XTAL
85
EXTAL
86
P11
121
TIOCA0
122
MD0
123
MD1
124
MD2
125
PG0
126
CS3
127
CS2
128
P44
109
AVss
113
AVcc
103
D7
1SS133
D6
1SS133
D5
1SS133
D8
1SS133
D9
1SS133
D10
1SS133
D1
1SS133
BR5
33X4
BR6
33X4
BR8
33X4
BR7
33X4
R5
0
X1
AT-51(19.6608MHz)
R19
0
R20
1k
C4
18p
R22
10k
R24
10k
R25
10k
BR14
33X4
BR15
33X4
BR17
33X4
BR20
10kX4
BR19
10kX4
BR18
10kX4
BR21
10kX4
BR2
0X4
BR1
10kX4
BR9
33X4
C3
18p
C23
1000p(NP)
ZD1
UDZ3.9B(NP)
ZD2
UDZ3.9B(NP)
C24
1000p(NP)
CN8
S5B-PH-K-S(NP)
R33
10k
ZD3
UDZ3.9B(NP)
R32
10k
BR3
10kX4
C21
0.1u
C19
0.1u
C20
0.1u
C18
0.1u
C17
0.1u
C16
0.1u
C15
0.1u
R4
10k
C6
NP
R27
10k
R14
10k
C14
0.1u
C7
NP
R28
10k
BR10
10kX4
BR11
10kX4
BR4
10kX4
D3
1SS133
D4
1SS133
D2
1SS133
R10
20k
R6
20k
R11
20k
R8
20k
R7
20k
R9
20k
R12
20k
R26
10k
BR16
33X4
R17
10k
R3
10k
R2
1k
R1
10k
BZ1
PKM13EPY-4000
R21
0(NP)
C5
0.1u(NP)
IC2
FS781(NP)
R23
3.3k(NP)
C1
0.01u(NP)
R18
22(NP)
C2
NP
R16
10k
R15
10k
C22
10u/25V
+
R13
10k
BR12
10kX4
BR13
10kX4
R30
0
IC3A
74LCX32
R31
0
R29
10k
C8
0.1u
R79
0
C13
NP
C11
NP
C10
NP
C12
NP
C9
0.1u
Q1
2SA-1162
R97
10k
NF1
ZJSR5101-223(NP)
IC1
H8S/2320
R106
0(NP)
ZD6
HZU3.3B2
R105
330
C74
4.7u/35V
VDD
VDD
VDD
CPU_VDD
VDD
VDD
VDD
VDD
VDD
CPU_VDD
VDD
VDD
VDD
VDD
VDD
VDD
VDD
VCC
SCAN1
SCAN2
SCAN3
SCAN7
SCAN8
SCAN9
SCAN0
/LEDENABLE
LEDSI
A[19..1]
/CS3
/CS2
/CS1
/CS0
RY/BY
BLY
/LWR
/HWR
/RD
/START
/BUSY
SENSE0
SCAN5
SCAN6
SCAN4
BLO
SENSE1
SENSE5
SENSE3
SENSE4
SENSE2
BLG
/LCDRES
/LED2
/LED0
/LED4
/LED5
/LED6
/LED1
/LED3
/WR
RS
/RESET
/FAXSW
FAXOPD
D[15..8]
D[15..0]
/CS4
/OPURESET
/LEDLATCH
/OPUCRDY
OPUSTS
/OPUSRDY
OPUCMD
LEDCLK
SENSE6
LCDCONT
A
A
B
B
C
C
D
D
E
E
4
4
3
3
2
2
1
1
LCD BACK LIGHT PWB
3. LCD BACK LIGHT PWB
1/4
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