Read Panasonic KX-TG6621RUB / KX-TG6621RUM / KX-TG6621UAB / KX-TG6621UAM / KX-TG6621CAB / KX-TG6621CAM / KX-TG6622CAB / KX-TGA661RUB / KX-TGA661RUM Service Manual online
7
KX-TG6621RU/KX-TG6621UA/KX-TG6621CA/KX-TG6622CA/KX-TGA661RU
4 Technical Descriptions
4.1.
Block Diagram (Base Unit)
Analog
F
ront
End
T
o
TEL_LINE
Br
idge
Rect
D D
3
Hook Switch
Q
3
,Q4,Q
Q
Q
3
,Q
4
,Q
5
A
udio
Bell/Caller ID
Interf
ace
CPU
25
27
19
21
2
3
24
18
BELL
HOOK
Off-Hook Line
V
oltage
17
A/D
D/A
ADPCM
Codec Filter
DSP
Speech Encoding
Speech Decoding
BMC
Burst Encoding
Burst Decoding
RF
PLL
5
2
77
9
10
EEPR
OM
SCL
SD
A
55
7
3
74
T
o
A
C
Adaptor
T
o
HANDSET
Limit
Resistor
Charge
Detector
P
o
w
er F
ailer Mode
P
o
w
er Supply SW
Q
3
51,IC
3
51
CHARGE(+)
CHARGE(-)
Optional
Optional
DC/DC con
v
e
rt
o
D
C
/D
C
c
o
n
v
e
rt
o
r
IC2,L
3
,C
3
6,Q60
IC
2
,L
3
,C
3
6
,Q
6
0
2
Q
9
Q
8
2.4V
Reg.
1.8V
Reg.
2.85 V
2.4 V
1.8 V
BBIC
IC401
IC7
KX-TG6621/TG6622 BLOCK DIA
GRAM
(BASE UNIT)
MOD/DEMOD
Charge
Pump
DCDC
Con
v
e
rt
er
54
XT
AL
X
1
10.
3
68
MHz
RX
n
RX
p
TX
p
TX
n
TX
on
RX
on
D801
6
72
ANT1
ANT2
ANT1
ANT2
ANT1
ANT2
78
80
L1
L2
DCP
DCM
3
FLASH MEMOR
Y
IC421
QSPI
FLASH MEMOR
Y
IC4
3
1
53
3
.0V
3
.0V
70
71
71
72
69
69
T AM-CSn
SPI-DI
SPI-DO
SPI-DO
SPICLK
QSPI-CS
DC-SENSE
DC-CTRL
QSPI-SCK
QSPI-IO 0-3
119, 120,
123, 126
Q22,Q2
3
R55,R56,
D22
CD_I
120
125
125
QSPI
Control
108
107
109
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