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  • KX-TG7227UAJ, KX-TG7227UAM, KX-TG7227UAS, KX-TG7227UAT, KX-TG7228UAS, KX-TG7228UAT, KX-TGA721RUM, KX-TGA721RUS, KX-TGA721RUT, KX-TGA721UAJ, KX-TGA721UAM, KX-TGA721UAS, KX-TGA721UAT

KX-TG7227UAJ, KX-TG7227UAM, KX-TG7227UAS, KX-TG7227UAT, KX-TG7228UAS, KX-TG7228UAT, KX-TGA721RUM, KX-TGA721RUS, KX-TGA721RUT, KX-TGA721UAJ, KX-TGA721UAM, KX-TGA721UAS, KX-TGA721UAT - Panasonic Telephone Service Manual (repair manual). Page 11

Read Panasonic KX-TG7227UAJ / KX-TG7227UAM / KX-TG7227UAS / KX-TG7227UAT / KX-TG7228UAS / KX-TG7228UAT / KX-TGA721RUM / KX-TGA721RUS / KX-TGA721RUT / KX-TGA721UAJ / KX-TGA721UAM / KX-TGA721UAS / KX-TGA721UAT Service Manual online

11
KX-TG7227UA/KX-TG7228UA/KX-TGA721RU/KX-TGA721UA
4.3.
Block Diagram (Handset)
SPEAKER
RECEIVER
MIC
CHARGE
CIRCUIT
Q4,Q5,Q9
R7
R7
CHARGE
CONTACTS
CHARGE(+)
CHARGE(-)
CHARGE
CHARGE DETECT
EEPROM
SCL
SDA
SWITCHED
SUPPLY
    Q1
Q1
BATTERY
TERMINAL
D7
VBAT1
DC/DC-SWITCH
J1
J2
2.5V
Q3
1.8V
Q2
4.0 V
2.5 V
1.8 V
LCD
RS
RESET
CS
SI
 SCL
CPU
Analog
Front
End
D/A
A/D
30
32
66
67
72
62
52
45
44
 58
56
  59 
 60
6
  9
10
77
ADPCM
Codec
Filter
DSP
Speech
Decoding
Speech
Encoding
BMC
Burst
Decoding
Burst
Encoding
RF
Interface
RF
Module
IC4
23
22
RXDA
TXDA
26
25
24
SYDA
SYEN
SYCL
16
17
XTAL
X1
10.368
MHz
BATTERY
61
ON SWITCH
KEYPAD
ROWS
COLUMNS
1,12,40,76
27,28,34,35,36,74
BBIC
IC1
IC3
 11
LCD-BACK  LIGHT
 7
KX-TGA721  BLOCK DIAGRAM (HANDSET)
KEY-BACK  LIGHT
 75
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