Nokia 445N Service Manual
Block diagram
38
445N
NOTE!
Safety components marked with
must be replaced with original
or approved components only.
All printed boards and the back
cover are also safety components.
Q101
T6.3A H 250V
SMD
ELECTROLYTIC
POLYCARBONATE
POLYESTHER
POLYPROPYLENE
CERAMIC
SMD
SMD 1W
0.25W
0.5W
1W
C102
4n7
400VAC
C101
470n
275V
C103
4n7
400VAC
R114
10k
D104
LL4148
R154
2k2
R116
6k81
C111
10n
63V
2W
3W etc.
0.25W NF
0.5W NF
FJ0801
3
2
R111
12k1
M101
D118
LL4148
T102
BC857B
4
1
R115
10k
M102
FJ1841
4
1
C119
10n
R110
100k
3
2
C112
4n7
R130
47k
C114
100p
R139
33k
1
1
2
3
C117
330p
R101
1M0
UC3843A
COMP
VFB
ISENSE
PGND
IC101
PTC102
18R
VREF
VCC
OUTPUT
GNDRT/CT
R134
100R
+T
C118
1n0
UC7123
1
R126
10R
C123
10u
50V
PTC101
18R
8
7
6
54
+T
R124
D105
1N5818
D102
LL4148
DZ101
18V
IC104
TOP223P
S
3
S
2
S
1
NTC101
4k7
S(HVRTN)
T105
BC807
5R
-T
C104
100n
250VAC
LL4148
C113
1u0
50V
R153
4k7
R109
100k
DRAINCONTROL
S(HVRTN)
S(HVRTN)
T104
BCR141W
UC7112
1
D119
R117
1k5
C115
10u
50V
54
6
7
8
C124
10n
PFC
1
2
3
4
5
6
Q104
D101
GBU4K
C105
330u
385V
C109
2n2
UC6879
1
500V
R118
33R
C116
100n
C110
100n
L108
6u8
3
C121
10u
50V
IRFIB6N60A
R119
R120
0R47
T103
BCR191
R127
1k00
D108
BYV26C
T101
2k2
R121
0R47
D106
BAV103
C137
630V
2
R122
0R47
R123
220R
D107
P6KE200A
D109
BAV103
543
22n
R113
47k
D103
BYV26C
DEMA
R104
10k0
R106
4R7
C120
10u
400V
1
2
RE101
QH0074
630V
R125
4R7
Q102
C108
22n
M104
FM3512
R128
470k
R137
4M7
321
654
C106
4n7
400VAC
C107
4n7
400VAC
R107
R108
470k
470k
13
9,8
6,5
215
7
4
32
PS2501-1L
4
32
4
32
PS2501-1L
IC102
PS2501-1L
IC106
M105
FM2578
9
7
10
6
IC103
19
14
18
21
17
20
16
C135
47p
1kV
R152
470R
1
1
1
5
BYV27-200
1
R129
470k
R138
4M7
POWER1
4
4
UC7123
1
UC7123
1
BYW98-200
F102
T3.15A
D110
RHRD460S
UC7123
1
RHRD460S
C136
100p
1k6V
D120
C122
680p
500V
D117
LL4148
POWER2
4
D115
LL4148
T111
BCR112W
D122
C129
2n2
500V
D114
D121
RHRD460S
R112
470R
D112
RHRD460S
C126
1000u
25V
D113
BYW98-200
H_FLY
2-4
UC7123
R131
220R
C145
1000u
25V
D116
1N4148
C151
10u
50V
C128
47u
200V
1
C125
2200u
16V
C131
1000u
16V
IC105
TL431
FJ0505
C127
100u
100V
L101
FJ0448
L103
FJ0448
L102
FJ0448
E101
MECH
R136
2k2
R151
470R
L106
FJ0505
L104
R147
220R
3
2
C132
100n
63V
1
R141
1k5
R140
1k0
160V
80V
-12V
6V
L107
R102
10k
15V
DEMA
4
C146
10u
50V
5V
T110
BCR141W
n.c.
R132
10k0
UC7111
1
GND
R142
1k0
FJ0448
R133
10k0
R103
220k
C134
n.c.
L105
R105
2k2
6V
D124
1N4002
T109
BC369
IC108
7812
OUTIN
REF
C147
1u0
50V
12V
15V
15V
DZ102
9V1
R155
1k5
C142
100n
R143
63V
10k
C141
1n0
1
3
IC107
TL431
2
R144
33k
R146
154k
R145
2k61
SUSPEND
R150
270R
4
5V
R148
220R
T108
BCR141W
R156
5V
R149
10k
T113
BC847B
Q103
1
2
3
10k
5V OUT
POWER_OFF
4
5V
UVLO
2,4
T112
BC847B
5V
C133
100u
25V
T106
BC857B
R135
1k0
D111
1N4148
RESET
4
ECN
445N28
445N
SMA251H
1
SB5249 01.00 Page 7
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