Read Panasonic KX-TG8551UAB / KX-TG8561UAB / KX-TG8561UAR / KX-TGA855RUB / KX-TGA855RUR Service Manual online
8
KX-TG8551UAB/KX-TG8561UAB/KX-TG8561UARKX-TGA855RUB/KX-TGA855RUR
4 Technical Descriptions
4.1.
Block Diagram (Base Unit)
Analog
Front
End
To TEL_LINE
Bridge
Rect D101
Hook Switch
Q141, Q142, Q161
Audio
Bell/Caller ID
Interface
CPU
MICn
LSRp
RINGn
CIDINp
CIDINn
CIDOUT
RINGOUT
BELL
HOOK
CHARGE_DET
Off-Hook Line Voltage
P
ARADET
A/D
D/A
ADPCM
Codec Filter
DSP
Speech Encoding
Speech Decoding
BMC
Burst Encoding
Burst Decoding
RF
PLL
XT
AL2
XT
AL1
EEPROM
SCL
SDA
To AC Adaptor
To HANDSET
Limit
Re
s
is
tor
R
3
71, R
3
72,
D
3
62
Charge
Detector
Power Failer Mode
Power Supply SW
Q351,IC351
CHARGE(+)
CHARGE(-)
Optional
for KX-TG8561 only
Optional
DC/DC con
v
e
rt
o
D
C
/D
C
c
o
n
v
e
rt
o
r
IC
3
02,L
3
01,
IC
3
0
2
,L
3
0
1
,
C
3
42,Q
3
10
C
3
4
2
,Q
3
1
0
Q
3
02
Q
Q
3
0
2
Q
3
01
Q
Q
3
0
1
2.4V
Reg.
1.8V
Reg.
2.85 V
2.4 V
1.8 V
BBIC
IC611
IC501
KX-TG8551/TG8561 BLOCK DIA
GRAM (BASE UNIT)
MOD/DEMOD
Charge
Pump
DCDC
Converter
Re
s
et
CP_VO
YT2
XTAL
X501X
5
0
1
10.368
MHz
RX
n
RX
p
TX
p
TX
n
TX
on
RX
on
D801
ANT1
ANT2
ANT1
ANT2
ANT1
ANT2
L1
L2
DCP
DCM
FLASH MEMORY
IC601
QSPI
FLASH MEMORY
IC502
CP_VO
YT1
3.0V
3.0V
RSTN
pin 62:
TG855x
pin 77:
TG856x
TAM-CSn
SPI-DI
SPI-DO
SPI-DO
SPICLK
QSPI-CS
DC-SENSE
DC-CTRL
QSPI-SCK
QSPI-IO 0-3
Q701, Q702
CD_I
QSPI
Control
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