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(1)
PC1
Q1
R6
(2)
0
(3)
Q2
4
1
3
2
PC2
(4)
R131
(5)
(6)
(7)
(8)
(9)
(10)
(11)
(12)
(13)
R936
R937
(14)
8.2K
8.2K
(15)
(16)
(17)
R910
C905
1.5M
K0.01
(18)
(19)
(20)
(21)
(22)
(23)
(24)
R994
10K
R995
10K
R996
1K
(25)
(26)
(27)
(28)
(29)
For ROM-WRITE
GND
UTX
URX
JTIO
IC1
C4
8
1
50V1
OUT
VDD
R2
JP101
7
2
HFI
CONT
R4
18K
6 HFO
3
LFI
Q3
120K
R3
5
4
VSS
LFO
330K
R10
NC
10K
R130
C116
1K
NC
Q108
R121
Q106
C117
R123
10K
33
K0.01
D102
C120
J10P
D105
TX
- Audio
- Tone
R306
12
C417
K0.01
Handset/Headset TX
Q401
- Audio
C423
Handset/Headset RX
- Audio
- Tone
C1
D3
D4
250V1.0
D5
0
D6
CP1
D2
LED804
PC3
C112 NC
Q107
R117
Q105
Q110
6.8K
Q109
R106
47K
R305
0
D306
R303
12
C421
J100P
C418
C416
R412
R411
K0.1
68K
10K
K1000P
C420
R422
0
33
33
10V DC (OFF Hook)
0V DC (ON Hook)
CP2
R1
6.8K
LED ON SUB PCB
Q103
C101
K680P
Loop
current
D10
Q104
C102
K680P
Q101
Q102
R503
1M
180K
C503
R501
C501
K1500P/500V
K1000P
C504
R502
180K
C502
K1500P/500V
K1000P
R504
1M
RX (ON Hook)
4.0V
- Caller ID
DC
IC305
5
1
VOUT
VIN
2
VSS
4
3
NC
NC
4.0V
4.0V
IC304
DC
D304
5
1
VOUT
VIN
2
VSS
4
3
NC
NC
4.0V
+3.2V
R420
47K
R416
NC
C415
NC
Q402
K0.1
C428
10V22
KX-TS620BX SCHEMATIC DIAGRAM (MAIN)
KX-TS620BXB/KX-TS620BXW
Line Voltage
48V DC (ON Hook)
10V DC (OFF Hook)
TP102
D7
L3
L1
D8
33uH
D9
JJ101
1
TIP
L4
POS101
L2
2 RING
33uH
TEL
JP102
TP101
JJ102
2
TIP
1 RING
DATA
DC1
CN301
1
6.5V
IC303
2
GND
VOUT
VCC
DC2
5.0V
Q301
Handset
TP401
CN401
R419
1 MIC(+)
L307
22K
2 MIC(-)
L308
TP402
3 SP(+)
L309
4 SP(-)
L310
TP403
CN402
2
3
4
5
L303
1
0
Headset Jack
Headset
NC: No Components
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Troubleshooting
