Chapter 6. Circuit Schematics And Parts Layout; Control Pwb Circuit - Sharp FO IS125N - B/W Laser - All-in-One Service Manual

FO-IS125N
CHAPTER 6.
FO-IS125N
CIRCUIT SCHEMATICS AND PARTS LAYOUT

[1] Control PWB circuit

1. Main Control Block (1a/12)
A
Main Control Block (1/2)
(2-6D) SDRD[15:0]
6
5
4
(2-4H) SDRCLK
(2-4H) SDRUDQM
SDRLDQM
(2-4D)
(2-4H) SDRCLKE
(2-4D) nSDRWE
(2-4D) nSDRCAS
(2-4D) nSDRRAS
(2-4D) SDRBA0
(2-4D) SDRBA1
(2-6D)
SDRA[12:0]
3
VBAT
2
(1-3G) VCTRL
2SA2059
1
A
B
SDRD0
SDRD1
SDRD2
SDRD3
SDRD4
SDRD5
SDRD6
SDRD7
BR102
SDRD15 1 8
SDRD14 2 7
SDRD13 3 6
SDRD12 BR104 4 5
SDRD11 1 8
SDRD10 2 7 100x4
SDRD9 3 6
SDRD8
4 5
100x4
BR107
1 8
2 7
3 6
4 5 BR109
1 8
100x4 2 7
3 6
4 5
100x4
BR110
SDRA0 1 8
SDRA1 2 7
SDRA2 3 6
SDRA3 4 5
SDRA12
100x4
BR111
SDRA11 1 8
SDRA10 2 7
SDRA9 3 6
SDRA8 4 5 BR112
SDRA7 1 8
SDRA6
100x4 2 7
SDRA5 3 6
SDRA4 4 5
100x4
8p
C121
C122
1u (1608)
X100
32.768KHz
DG
R113
0
DG
C126
10p
nRESET
<BAT RESET-2>
TP109
TP111
+3.3V
C138
N.M. (2012)
B
DG
VCORE PLLVDD
Q100
TP113
1 2
L101
0 (1608)
C142 C143
10u (2012) 1000p
DG DG
B
Service Manual
C
8 7 6
BR100
100x4
1 2 3 4
DG
+3.3V
VCORE
133
DQ[14]
134
DQ[13]
135
DQ[12]
136
DQ[11]
137
DQ[10]
C109 138
VDDO
0.1u 139
VSS
C110 140
VDD
0.1u 141
DQ[9]
142
DQ[8]
143
DQM[1]
144
DQM[0]
R104 100
145
SDRAM_CLK
C113
146
VDD
0.1u 147
VSS
148
CKE
149
WEn
150
CASn
151
RASn
152
BA[0]
153
BA[1]
C115 154
VDD
0.1u 155
VSS
C116 156
VDDO
0.1u 157
ADDR[0]
158
ADDR[1]
159
ADDR[2]
160
ADDR[3]
R106 100 161
ADDR[12]
162
ADDR[11]
163
ADDR[10]
C118 164
VDD
0.1u 165
VSS
C120 166
VDDO
0.1u 167
ADDR[9]
168
ADDR[8]
169
ADDR[7]
170
ADDR[6]
171
ADDR[5]
172
ADDR[4]
173
RTC_VDDO
174
RTC_VSS
175
RTC_XIN
176
RTC_XOUT
+3.3V
R116 2.2K
R115
0
TP107
K A
VBAT
D100 PLLVDD
0 (RB751S-40)
R117
100K
<BAT RESET-1>
TP110
TP112
C134
10u (2012)
DG DG
R119 1M
R124
R125
2 1
C139 X101
18p 24MHz C140
DG C141
N.M.
DG
C
6 – 1
D
BR101
100x4
5 8 7 6 5
1 2 3 4
IC100
CX95410-12Z
FAX ENGINE
1.2K
0
DG
22p
D
R1
C100
470p
C
0
AK
AK