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+5V (
R31 ) NC (
R33 ) NC ) R37 NC C34 ) NC (
(1)
FAX TX Signal FAX RX Signal
+2.0V R10 120K C8 J68p R2 10K C7 R5 0 D1 C4 +24VA L7 BEAD
C30 R27 NC ( NC ( ) )
( )
Q4 NC 4
(
PC1 NC
(
C E
A K
)
(2)
+2V
Z0.1u
IC3-1
8 1 4 2 3 D10p C13
R13 91K
C17 K0.022u
AG
(3)
300:600 D2 C31 5.6V D3 5.6V K0.01u 6 3 2 T1 1 1 T2 2 3
L9 0 390 1/4W K0.1u C27 R28
(4) (5)
50V4.7u +12V 4.7V L3 BEAD
AG
L4 BEAD R11 ( NC
AG
R18 91K
C21 K0.022u L8 0
(
5 4
)
(6) (7)
150K C28 R29 R14 ) NC 0
C9 )
C18
R23
NC
K0.047u
(
3.6K
0
C14
R15
)
(
1.8K
AG
Q5
AG
K0.01u
AG
3.9K
C19
R24
(8) BELL DETECT
C24 Immunity countermeasure part +5V C11 R25
J120p 330K 50V4.7u C29
5V 0V
(9)
+24V CN1 +24V 1 AG 2 +5V 3
AG
L2 0
R16 D10p C22 6 7 5
K0.082u 24K
IC3-2
C12 R17 R22 C26
FAX TX +12V
PAPER 4 LINETX 5 TONE1 6 RLY 7 CPC 8 JAM 9 P_SHORT 10 BELL 11 HOOK 12 LINERX 13 MONRX 14 H/STX_MUTE 15 H/SRX 16 L1 BEAD K0.1u 62K 39K K0.022u
(10)
(11)
(12)
PEPAR SW NO PAPER: 5V PAPER: 0V
+5V R6 4.7K R3 100 C2 K0.01u
+5V R12
JAM SW NO PAPER: 5V PAPER: 0V
Q2
2V
R32 6.8K R38 )
(13)
NC ( NC
AG
2 4
SW1
1 3
4.7K R7 100 C5 K0.01u
AG AG
2 4
SW3
1 3
R30
12K Q3 R34 2.2K
Q6
HOOK SW ON-HOOK: 5V OFF-HOOK: 0V
( )
R40 0 R46
AG
AG
+5V +24VA +5V +2.0V R4 4.7K R1 100 C1 K0.01u ) C16 NC R20 220K SW2 4 3 1 2 ) 10K R8 +12V C10 ) L5 NC 0 C15 L6 0
AG
+24V
(14)
) NC ( NC
AG
Q1 R26 10K R35 10K C25 ) D15 NC
AG
Q7
AG
( )
6.3V47u R9
16V10u C20
(
Z0.1u R21
220K
NC C6
AG
AG AG AG AG
(
10K
C3
(
Z0.1u
(
+5V R59 1K
(1)
R53 33 1/2W 12K C PC3 P627 E D6 50V 10uF C39 R43
2 A K 1
D7
3 4
FAX TX Signal FAX RX Signal
(2)
R39 ( ) NC Q8
C49 R48 6.8K 680p C50 680p ( NC R52 50V 2.2uF JJ2 0 ZNR1 C56 ( NC R68 +5V 22 1/4W 5 R67 2.2K R47 47K 1/2W C48 PC4 NC ( ) 120V RLY1-1 4 3 2 1 L20 L32 F1 BEAD 3 SA1 350V L33 BEAD ) NC L34 0 SA2 3000V L26 BEAD CN5 1 b1 TH1 NC ( ) POS1 CN4 1a 2b 0 L19 )
(3) (4) (5)
( )
NC 4 JJ3 0 L21
(6) (7)
+5V
R44 24K
(
4 3
AG
1 2
)
L27 BEAD
(8)
C PC2 E KA D4 5.6V
AG
AK
250V 0.33u
D5 5.6V
R57 22K 1/2W
2 a1
(9)
CPC DETECT
C38 R49 J18p 750K +5V L12 0 ) 8 2 3 C43 ( 5V 0V +2.0V R60 0 R61 C74 ( K0.012u R84 1M Q11 NC R80 NC ) R82 ) DA1 1A NC 2K 1K2A +24V T3 NC 1 5 4 2 3 R83 ( NC )
R45 2.2K
C37 Z0.1u
4
IC2-1
L13 0
AG
AG
(11)
10K
K0.1u
D14
(12)
C41 6.3V47u J180p R54 430K L10 R36 C32 K0.1u R51 2.2K R73 1.5K C62 R70 330 L18 0
AG
+5V
Q10
IC2-2
7
6 5
C45 D10p
R63
3.3K C53
K0.1u
AG
(13)
L28 L29 L22 BEAD
0 0 CN3 1 HSMIC2 HSSP+ 3 HSSP4 HSMIC+
BEAD 51K
R64 +2.0V 430K C46 ( ) NC R56 L14 0
3.3K C52
K0.1u +5V C61
FLT3 NC 8 1 7 6 5 2 3 4
K0.01u C63
1.5K
R66 22
L15 0
K0.01u R71
L24 BEAD L25 BEAD L23 BEAD
AG
L11
C40 K0.1u
C65
D12
12K
C51 K4700p
AG
C58 16V10u
AG
R55 330
AG
AG
2.5V
D13
0
K0.01u
(14)
R58
47K
Q9
C55
R65
6.3V47u C57 ( ) NC
L17 0
R79
0
L30 0 L31 0
KX-FT902FX-B : ANALOG BOARD (PCB2)
1
2 RLY1-2
R81
C76
AG
AG
( )
(10)
1
NC
10K
( )
(