Read Sharp ER-A280 / ER-A280N / ER-A280F (serv.man5) Service Manual online
ER-A280F/A280N (V)
CIRCUIT DIAGRAM & PWB LAYOUT
8 – 12
■
PO
WER (FOR LOGIC)
12/12
C
D
B
A
C
D
B
A
876
5
4
321
8
76
5
4
321
VCC5
24V
VLED
VCC3
3.6VB
VCC3
3.6VB
VCC3
VDD3
VBAT1
[1]
BAT_AD
[1]
VBAT2
[1]
3.3V Battery BackUpped
5.0V
Littel 372
VBAT1 = max 3.00v ( at Li-ION =8.4v)
= th 2.140v ( at Li-ION =6.0v)
3.3V
R245
10K
CN16
5267-02A(BLUE)
1
1
2
2
R238
10K/F
C183
1000pF
C183
1000pF
R234
24.3k/F
C179
0.33uF
C179
0.33uF
R243
4.7K
R229
00
Q23
2SK3541
Q23
2SK3541
D
G
S
C181
0.33uF
C181
0.33uF
C186
220pF
C186
220pF
C172
1uF
Q21
2SA1036K
C
E
B
D29
1SS3551SS355
A
C
D32
1SS355
A
C
R237
68
ZD4
PTZ6.2B
A
C
ZD5
PTZ4.3B
A
C
Q22
2SK3541
D
G
S
IC23
BA33DD0WHFP
CTRL
1
VCC
2
GND
3
VOUT
4
NC
5
TAB
6
C169
4.7uF/50V
CERAMIC
IC22
SC4525A
SW
1
VIN
2
ROSC
3
GND
4
SS/EN
5
COMP
6
FB
7
BST
8
R231
(NU)
C170
0.33uF
+
C165
330uF/10V SKV(8x10.5),470uF/
16V MVL(10x10.3)
+
1
2
R244
(1M)
R244
(1M)
RB060L-40
D35
RB520G-30
A
C
D34
A
C
C184
1000pF
C184
1000pF
C166
(NU)
C177
0.001uF
R235
3K/F
F8
T1.6A/250V SEMKO
D33
RSX501LA-20
D33
RSX501LA-20
A
C
R236
22
R242
10K
R248
1ohm
R248
1ohm
D31
RSX501LA-20
A
C
IC25
XC6108C30BMR
IC25
XC6108C30BMR
3
VIN
VSS
2
VOUT
1
CD
5
VSEN
4
TP155
R241
10K/F
R233
18.2k
C164
0.1uF
R232
10K
R232
10K
TP86
C178
0.1uF
+
C180
47uF/6.3V SKV(5x5.5)/MVL(5x5.7)
+
C180
47uF/6.3V SKV(5x5.5)/MVL(5x5.7)
1
2
R247
100K
R247
100K
C182
0.1uF
C182
0.1uF
R246
1M
R246
1M
C176
22uF/10V
CERAMIC
C175
10pF
+
C173
(10uF/10V, OS SVP(4.0x5.4))
+
1
2
R240
10
+
C171
+
47uF/6.3V SKV(5x5.5)/MVL(5x5.7)
1
2
R228
(NU)
IC24
R1154H028B-T1-F
IC24
R1154H028B-T1-F
1
VOUT
GND
2
CE
3
NC
4
VDD
5
L6
5.2uH (DR74-5R2)
D30
RB060L40
D30
A
C
R239
47K
R230
12K/F
C174
0.010uF
TP154
+
C168
220uF/35V SKV(10x10.5)/
MVL(10x10)
+
1
2
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