Read Panasonic KX-TG7851RUH / KX-TG7851RUJ / KX-TG7851RUR / KX-TG7852RU1 / KX-TG7861RUH / KX-TG7861RUW / KX-TG7862RU2 / KX-TGA785RUB / KX-TGA785RUH / KX-TGA785RUJ / KX-TGA785RUR / KX-TGA785RUW Service Manual online
8
KX-TG7851RU/KX-TG7852RU/KX-TG7861RU/KX-TG7862RU/KX-TGA785RU
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
Resistor
R
3
71, R
3
72,
D
3
62
Charge
Detector
CHARGE(+)
CHARGE(-)
for KX-TG7861 only
Optional
IC
3
02
3
.0V
IC
3
0
2
3
.0
V
REGULA
T
O
R
R
E
G
U
L
A
T
O
R
Q
3
02
Q
Q
3
0
2
Q
3
01
Q
Q
3
0
1
2.4V
Reg.
1.8V
Reg.
3
.0 V
2.4 V
1.8 V
BBIC
IC611
IC501
KX-TG7851/TG7861 BLOCK DIA
GRAM (BASE UNIT)
MOD/DEMOD
Charge
Pump
DCDC
Converter
Reset
CP_VOUT2
XTAL
X501X
5
0
1
10.368
MHz
RX
n
RX
p
TX
p
TX
n
D
A802
ANT1
ANT2
ANT1
ANT2
ANT1
ANT2
L1
L2
DCP
DCM
FLASH MEMORY
IC601
QSPI
FLASH MEMORY
IC502
CP_VOUT1
3.0V
3.0V
RSTN
Pin 71
TAM-CSn
SPI-DI
SPI-DO
SPI-DO
SPICLK
QSPI-CS
QSPI-SCK
QSPI-IO 0-3
Q701, Q702
QSPI
Control
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