Sharp ER-A450T Service Manual - Page 44
Circuit Diagram &, Pwb Layout
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8 7 6 5 4 CHAPTER 8. CIRCUIT DIAGRAM & PWB LAYOUT 1. MAIN PWB CIRCUIT DIAGRAM POWER SUPPLY(MAIN PWB) D +24V F1 HEAT SINK Q23 C4153 L1 CN8 +24V GND 1 2 PS CN FROM PS PWB C FUSE UL. CSA 1A/125V C266 100uF 50V C84 0.1uF 50V IC6 6 1 5 7 2 8 3 4 KA34063 C85 220P R111 10 220uH D6 SFPL52V 3 2 R112 3.6KF R113 1KF C80 1000uF 16V ZD2 PTZ6.2A D5 1SR154-400 D4 1SR154-400 R121 180 R120 150 C81 330uF/16V BT1 BATTERY 1 1/12 D VCH +5V VDD C82 330uF/16V C +24V +5V B D7 1SS353 +24V R114 8.2KG R117 2.7K R119 2.7K 8 IC7B 5 7 6 R118 4 R115 56K 15KG BA10393F 8 3 IC7A C83 1u/50V 1 2 /P0FF 3-8C BA10393F 4 A 9.1KG R116 ZD1 UDZ5.1B C87 1000P 8 7 6 5 4 C86 0.1uF/50V VBT CN9 2 1 BT CN B A 3 2 1
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CHAPTER 8. CIRCUIT DIAGRAM &
PWB LAYOUT
1. MAIN PWB CIRCUIT DIAGRAM
POWER SUPPLY(MAIN PWB)
VCH
+5V
VDD
R112
3.6KF
D4
1SR154-400
D5
1SR154-400
ZD2
PTZ6.2A
C80
1000uF
16V
R121
180
L1
220uH
R111
10
D6
SFPL52V
Q23
C4153
HEAT SINK
1
2
4
3
5
6
7
8
IC6
KA34063
C266
100uF
50V
1
2
CN8
PS CN
+24V
F1
FUSE
UL. CSA
1A/125V
FROM PS PWB
+24V
GND
C85
220P
C84
0.1uF
50V
VBT
BT1
BATTERY
R113
1KF
C86
0.1uF/50V
R120
150
C81
330uF/16V
C82
330uF/16V
2
1
CN9
BT CN
+5V
/P0FF
R118
56K
+24V
D7
1SS353
R119
2.7K
3
2
1
8
4
IC7A
BA10393F
5
6
7
8
4
IC7B
BA10393F
+24V
<P-OFF CIRCUIT>
C83
1u/50V
R117
2.7K
R114
8.2KG
R115
15KG
R116
9.1KG
ZD1
UDZ5.1B
3-8C
C87
1000P