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Model
KX-TC2105RUB KX-TC2105RUS KX-TC2105RUT KX-TC2105RUW
Pages
63
Size
1.69 MB
Type
PDF
Document
Service Manual
Brand
Device
Telephone / TELEPHONE EQUIPMENT
File
kx-tc2105rub-kx-tc2105rus-kx-tc2105rut-kx-tc2105ru.pdf
Date
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Panasonic KX-TC2105RUB / KX-TC2105RUS / KX-TC2105RUT / KX-TC2105RUW Service Manual ▷ View online

12.3. Changing the Channel
29
KX-TC2105RUB / KX-TC2105R US / KX-TC2105R UT / KX-TC2105RUW
Handset:
transmitting (TX) ... 25 Pin
receiving (RX) ... 12 Pin
Base Unit:
transmitting (TX) ... 23 Pin
receiving (RX) ... 10 Pin
12.4. Ports for transmitting and receiving of data
12.5. Waveform of DATA used for cordless transmission and reception
The DATA which is transmitted from the Handset to the Base Unit is combination of DATA 0, DATA 1, DATA Delimit.
The DATA which is transmitted from the Base Unit to the Handset is combination of DATA 0, DATA 1, DATA Delimit.
12.5.1. Handset
12.5.2. Base Unit
     • 
• 
• 
• 
For example (one of part of data)
30
KX-TC2105RUB / KX-TC2105R US / KX-TC2105R UT / KX-TC2105RUW
13 BLOCK DIAGRAM (BASE UNIT)
RF IC
IC401
DUPLEXER
DPX401
RF AMP
Q401,T401
RX VCO
T404,C446
1st IF
Filter
1st Mixer 2nd Mixer
2nd IF
Filter
IF
Filter
DET
PRE AMP
EXPANDER
LINE AMP
DATA AMP
DATA Filter
Filter
1st Local
Crystal
PLL
Osc
TX PD
RX PD
MIC AMP
LIMITER
COMPRESSOR
RESET
POWER
DOWN
MODULATION
TX VCO
Q403,T402,
DV401
TX AMP
Q405,T403
RF DATA
RF CLOCK
RF EN
POWER DOWN
RESET
RX DATA
MCU
CPU
IC201
TEL LINE
AMP Q304
TEL LINE SW
Q301,Q302
Diode Bridge
D303-D306
TEL LINE
AMP Q305
TX DATA
Crystal
BELL DTC
Q309
DC 12V
Transistor
Q101,D103
DC9.1V
DC5V
LED201
Q201
Charge Control
Q102,Q103
+
-
Q104
Charge Detection
Charge Control
KX-TC2105  BLOCK DIAGRAM (BASE UNIT)
KX
-T
C210
5RUB
/
K
X
-T
C
2105R
US
/
K
X
-T
C
2105R
UT
/
K
X
-T
C
210
5RUW
31
14 CIRCUIT OPERATION (BASE UNIT)
14.1. Outline
Base unit consists of the following ICs as shown in BLOCK DIAGRAM (BASE UNIT) (P.31).
     • 
• 
• 
• 
CPU: IC201
     − 
− 
− 
− 
Controlling the whole system
     − 
− 
− 
− 
Forming/analyzing all data signals (ACK, CMD signal etc.)
     − 
− 
− 
− 
All interfaces (ex: LED, Detector Circuit (Charge/ Power Down))
     • 
• 
• 
• 
RF IC: IC401
     − 
− 
− 
− 
PLL Oscillator
     − 
− 
− 
− 
Detection
     − 
− 
− 
− 
Compress/ Expander
     − 
− 
− 
− 
1st/2nd mixer
     − 
− 
− 
− 
Amplifier for transmission and reception
     − 
− 
− 
− 
DC 5.5V regulator
     − 
− 
− 
− 
Reset Circuit
     • 
• 
• 
• 
Additionally,
     − 
− 
− 
− 
Power Supply Circuit
     − 
− 
− 
− 
Charge Circuit
     − 
− 
− 
− 
Telephone Line Interface Circuit
32
KX-TC2105RUB / KX-TC2105R US / KX-TC2105R UT / KX-TC2105RUW
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