Brother International FAX-1010 Service Manual - Page 39

Circuit, Diagram, U.S.A., versions

Get Brother International FAX-1010 PDF manuals and user guides View all Brother International FAX-1010 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 39 highlights

3.3 NCU PCB The NCU PCB switches the communications line to telephone or built-in MODEM, under the control of the main PCB. JI 2 - Al A2 .tan, enx 13!2P111 L3 L4 -i> JS 11 LO 0200X. ::5R200P.X. L DI 199120 R3 1000 20 O ,=02 22 ,__,CC OBI S1YB4D or ::AIE 0 R20 100o 7I!;627 039'2'6'39 gS9 400V CIO .474 250V .^1 Ri, w C1 C3 CG222 EC2.2P V+ 7Rx :20 O i1,tJ,.ee22a 10K 2D RIO 20K ZD2 202. DX2 CII T" , PCS P9252E Tr P32D 215 7' rr T'l OA ISV 50V SRC , IDK OI rscaoo3 R23 150 ,0V 013 PC1 PS2501 T L;;2I PS;;21 JI.J2 13 TOP VIEW TOP VIEW 4 PLUG SIDE PLUG 91 DE R27 ION SDV SOV 7. WC $91,g74AA3,,,IME TA LL I 2ED POLYESTER F I LN CAP AC I TORT 6. PC'724 x2.74.43,f,t IP OLY EST ER F I LII CAP AC I TORT 5. CC ,t5Z7P3Vi,,,fe ER AM IC CAPACITOR) 4. EC ,IWYfrtfALUNINUM ELECTROLYTIC CAPACITOR) 5. COMPONCH , , on rAnen.nc,,, na , , 0 De MOU. , 00. 3. f )A,BAA*M3A. 2. UNLESS OTHERWISE SPECIFIER.THE VOLTAGE RESISTANCE OF CAPACITORS IS 25V OR 50V. 2. it;t,3,..U .Y./MPEA25VRA5OVFX.4. I• UNLESS OTHERWISE SPECIFIER.POWER CONSUMPTION OF RESISTORS IS I/4W• 1•32;i,l6B,BRIVIA1/4WE2A. ° 10 • • vO 014 GC104 25V ,,,,, !SY v0 0 V NCU PCB Circuit Diagram (U.S.A. versions) O Surge absorbers ® Line relay (CML relay) ® Line transformer ® Circuit related to the line transformer ® High-impedance transformer circuit ® Calling signal detector C) Loop current detector ® Dial pulse generator ® Telephone circuit C) Reference voltage generation circuit for the operational amplifiers in ® and ® O Noise filters (provided on the FAX1570MC/MFC1870MC/1970MC) III -27

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
  • 115
  • 116
  • 117
  • 118
  • 119
  • 120
  • 121
  • 122
  • 123
  • 124
  • 125
  • 126
  • 127
  • 128
  • 129
  • 130
  • 131
  • 132
  • 133
  • 134
  • 135
  • 136
  • 137
  • 138
  • 139
  • 140
  • 141
  • 142
  • 143
  • 144
  • 145
  • 146
  • 147
  • 148
  • 149
  • 150
  • 151
  • 152
  • 153
  • 154
  • 155
  • 156
  • 157
  • 158
  • 159
  • 160
  • 161
  • 162
  • 163
  • 164
  • 165
  • 166
  • 167
  • 168
  • 169
  • 170
  • 171
  • 172
  • 173
  • 174
  • 175
  • 176
  • 177
  • 178
  • 179
  • 180
  • 181
  • 182
  • 183
  • 184
  • 185
  • 186
  • 187
  • 188
  • 189
  • 190
  • 191
  • 192
  • 193
  • 194
  • 195
  • 196
  • 197
  • 198
  • 199
  • 200
  • 201
  • 202
  • 203
  • 204
  • 205
  • 206
  • 207
  • 208
  • 209
  • 210
  • 211
  • 212
  • 213
  • 214
  • 215
  • 216
3.3
NCU
PCB
The
NCU
PCB
switches
the
communications
line
to
telephone
or
built-in
MODEM,
under
the
control
of
the
main
PCB.
DI
199120
JI
-i>
2
—
Al
A2
13!2P111
JS
11
LO
R3
1000
20
O
,=02
,__,CC
22
.tan,
enx
L3
L4
OBI
S1YB4D
or
::AIE
0
R20
100o
7I!;627
0
3
9
'
2
'
6
'
39
C1
g
S9
400V
CIO
Ri,
.474
w
250V
.^1
215
PCS
7
'
P9252E
Tr
rr
P32D
10K
C3
CG222
EC2.2P
V+
:20
it,.
7R
O
x
1,
,
J
ee22a
2D
RIO
20K
ZD2
CII
202.
DX2
T"
,
PC1
PS2501
L;;
T
2I
PS;;21
°
L
0200X.
::5R200P.X.
T
l
'
OA
ISV
50V
SRC
,
IDK
R27
ION
SDV
OI
rscaoo3
R23
150
,0V
013
SOV
7.
WC
$91,g74AA3,,,
IME
TA
LL
I
2ED
POLYESTER
F
I
LN
CAP
AC
I
TORT
6.
PC
'724
x2.7
4.43,f,t
IP
OLY
EST
ER
F
I
LII
CAP
AC
I
TORT
5.
CC
,
t5Z7P3Vi
,
,,
fe
ER
AM
IC
CAPACITOR)
4.
EC
,
IWYfrtfALUNINUM
ELECTROLYTIC
CAPACITOR)
5. COMPONCH
, ,
on
rAnen.nc,,,
na
,
,0
De
MOU.
,
00.
3.
f
)A,BAA*M3A.
2.
UNLESS
OTHERWISE
SPECIFIER.THE
VOLTAGE
RESISTANCE
OF
CAPACITORS
IS
25V
OR
50V.
2.
it;t,3,..U
.
Y./MPEA25VRA5OVFX.4.
I•
UNLESS
OTHERWISE
SPECIFIER.POWER
CONSUMPTION
OF
RESISTORS
IS
I/4W•
1•32;i,l6B,BRIVIA1/4WE2A.
JI.J2
13
TOP
VIEW
TOP
VIEW
4
PLUG
PLUG
SIDE
91
DE
014
GC104
25V
10
•
•
vO
,,,,,
!SY
v0
0
V
NCU
PCB
Circuit
Diagram
(U.S.A.
versions)
O
Surge
absorbers
®
Line
relay
(CML
relay)
®
Line
transformer
®
Circuit
related
to
the
line
transformer
®
High
-impedance
transformer
circuit
®
Calling
signal
detector
C)
Loop
current
detector
®
Dial
pulse
generator
®
Telephone
circuit
C)
Reference
voltage
generation
circuit
for
the
operational
amplifiers
in
®
and
®
O
Noise
filters
(provided
on
the
FAX1570MC/MFC1870MC/1970MC)
III
-27