Panasonic KX-TS2382UAB / KX-TS2382UAW Service Manual ▷ View online
7
KX-TS2382UAB/KX-TS2382UAW
4 Technical Descriptions
4.1.
Block Diagram
D1
0
1
T
R
IC
1
MI
C
O
N
R
in
g
er
i
n
d
ic
at
io
n
L
E
D
LE
D
1
Li
ne
ON
/O
F
F
H
and
se
t
R
e
ce
iv
in
g
Am
p
Si
de
to
ne
Br
id
ge
(2
AP)
D1
0
6
D201
C1
R1
Vo
l
Ring
o
u
t
R
ingd
e
t
Vd
d
Vs
s
XO
U
XI
N
X1
Handset
KX-TS2382 BLOCK DIA
GRAM
SP
MIC
Q101, Q103
Q107
Q301, Q306, Q308
Q401
Q303, Q304, Q305
Buzz
er
Handset
Sending
Amp
Handset
V
o
lume
Control
D6
D102
D4
Ring detect
circuit
Ringer Out
ON-OFF
circuit
OFF HOOK
OFF HOOK
Keyboard
Switch
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KX-TS2382UAB/KX-TS2382UAW
4.2.
Circuit Operation
4.2.1.
Power supply circuit
The set is powered from the line, 48V/24V.
• Off hook
LINE
→ Q101 → Q107 → R119 → D106 → D201 → D203 → Vdd (pin7 of IC1)
• On hook
LINE
→ R101 → R102 → D101 → SW1(pin 5-6) → R13 → D102 → D6 → Vdd (pin7 of IC1)
4.2.2.
Bell Ringer Circuit
When the bell signal is input from LINE to T/R (when the telephone rings), the signal is detected and output by micon to the
buzzer via the following path :
buzzer via the following path :
• Bell Detection circuit
T / R
→ C1 → D2 → R2 → D8 → Q1 → RINGDET (pin 27 of IC1)
• Bell Output circuit
Pin 15 of IC1
→ Q2 → Q3 → R9 → SW2/3 → Buzzer
4.2.3.
Telephone Line Interface
4.2.3.1.
Circuit operation
• On hook
Q101 is OFF, on-hook condition where DC loop is disconnected and voice signal flow is cut.
• Off hook
During Off-Hook, pin 4_6 of SW1. Q101 is ON, providing an off-hook condition (active DC current flow through the circuit) and
the following is the signal flow :
T
the following is the signal flow :
T
→ POS101 → L101 → D101(+) → Q101 → Q107 → R119 → D106 → D101(-) → L102 → R
• Receiving signal flows:
LINE
→ Q101 → C114 → C301 → R301 → Q301 → C305 → R307 → C306 → Q306 → C310 → R315 → Q308 → C315 →
R318
→ SP (handset)
• Transmission signal flows:
MIC (handset)
→ C402 → VR401 → R405 → C405 → Q401 → R409 → C410 → Q107 → Q101 → LINE
• Pulse Dial
A pulse signal switches repeatedly between high and low logic is output from IC1 (pin 11), on and off the line loop, generating the
pulse dial signal.
pulse dial signal.
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KX-TS2382UAB/KX-TS2382UAW
5 Location of Controls and Components
Refer to the Operating Instructions.
Note:
You can download and refer to the Operating Instructions (Instruction book) on TSN Server.
6 Installation Instructions
Refer to the Operating Instructions.
Note:
You can download and refer to the Operating Instructions (Instruction book) on TSN Server.
7 Operating Instructions
Refer to the Operating Instructions.
Note:
You can download and refer to the Operating Instructions (Instruction book) on TSN Server.
7.1.
For Service Hint
7.1.1.
To Release the Establishment of Dial Lock
If the current password is forgotten, follow this procedure, you will be able to establish a new password.
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KX-TS2382UAB/KX-TS2382UAW
8 Troubleshooting Guide
8.1.
Service Hints
8.2.
Pulse Dialing Problems
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