Panasonic KX-TG8227UAB / KX-TG8227UAR / KX-TG8227UAW / KX-TGA820RUB / KX-TGA820RUR / KX-TGA820RUW / KX-TGA820UAB / KX-TGA820UAR / KX-TGA820UAW Service Manual ▷ View online
73
KX-TG8227UAB/KX-TG8227UAR/KX-TG8227UAW/KX-TGA820RUB/KX-TGA820RUR/KX-TGA820RUW/KX-TGA820UAB/KX-TGA820UAR/KX-TGA820UAW
Charge Current
Bell signal
RX_AF
TX_AF
Caller ID,
Bell Signal
Bell Signal
Loop Current
0 V
0.65 V
TX DATA
RX DATA
300 mV p-p
1.8 V
2.5 V
3.3 V
L2R
J1
NC
J2
NC
L1
33u
L2
33u
680p
C9
680p
C10
D3
4
1
3
2
*R123
NC
100k
R14
2.7k
R15
LINE_DC
SA1
CLK
R1
10k
1.5n
C3
1M
R4
C5
1n
1.5n
C4
1M
R6
R5
180k
C6
1n
*R7
5.6M
100k
R8
+2.5V
*R9
5.6M
100k
R10
1
*INT1/P11
2
VDDIO1
3
VDD1
4
VSS1
5
SDA1/P25
6
SCL1/P24
7
*INT5/VDDE/P15
8
*INT2/P12
9
AVD
10
AVS
11
CAP
12
Xtal1
13
VSSRF
14
RFCLKp
15
RSSI/RFCLKm
16
VDDRF
17
RFCLKd
18
TDO
19
RDI
20
SK
21
PD1/SIO
22
LE
23
P31/PD1
24
P32/PD2
25
P33/PD3
26
P34/PD4
27
TDOD/P35/PD5
28
P36/PD6
29
VSS2
30
VDDIO2
31
VDD2
32
PCM_FSC/*INT0/P10
33
P00/UTX
34
P01/URX
35
P02/JTIO
36
P03/SDA2
37
P04/SCL2
38
P05/SPICLK/PCM_CLK
39
P06/SPIDO/PCM_DOUT
40
P07/SPIDI/PCM_DIN
41
VSS3
42
VDD3
43
P23/ADC1
44
P17/CHARGE/INT7
45
*RST
46
VBAT1
47
LDO1_CTRL
48
LDO2_CTRL
49
LDO1_
Sense
50
AVS2
51
AVD2
52
*CIDIN
53
*LSR/REF
54
LSRp/REF
55
RINGING
56
*MIC/CIDOUT
57
VREFm
58
AGND
59
MICp
60
CIDINp
61
P14/*INT4
62
P13/*INT3
63
ADC2
64
ADC0
J101
J104
J103
J102
R76
1
k
R813.3k
100n
C56
+1.8V
15
R72
VDD1
+2.5V
VDD2
VDD3
+3.3V
120
R38
200
R39
4
Fin
1
ADJ/GND
3
Input
2
Output
+8.0V
DCM
1k
R79
1k
R80
L2T
L1T
L1R
CN2
2
1
NC
C30
1u
C70
SA2
NC
3.3M
R73
C2
NC
100
R75
TP23
10k
R74
TP9
TP_RLY1
L1T/TP_RLY2
L2T/TP_RLY3
L2T/TP_RLY3
L1R/TP_RLY4
TP_RLY5
10k
R77
10k
R78
C37
NC
3.3k
R71
3.3k
R117
1k
R33
0
R97
R3
180k
*C12
1u
C31
J11
NC
NC
SA11
2
1
NC
SA12
2
1
NC
D2
A K
*D5
A
K
*D6
A K
D21
N
C
A K
R126
NC
NC
NC
R128
+2.5V
10k
R129
1k
R130
TP16
TP15
330u
C36
6.3
C32
100u
16
16
10u
C71
10u
C64
16
NC
SW1
1 2
R138
NC
0
R140
NC
C7
NC
C8
NC
R139
NC
PCM_FSC
PCM_CLK
PCM_DOUT
PCM_DIN
DCP
10k
R16
2.2k
*R17
100k
R32
100k
R34
1k
R35
220p
C52
220p
C53
0
L22
C1
10p
C48
NC
C54
10n
C55
C57
NC
C59
C60
C61
C65
C73
C74
C75
C68
NC
C69
10p
C136
10p
C137
220n
C72
C156
NC
1n
C157
1n
C96
X1
1
3
2
L9
390
C67
TP16-sub
TP15-sub
3.9
R55
3.9
R56
3.3
R57
CHARGE
US1
*R124
10
*R13
680
*R12
10k
*R36
150k
Q8
Q9
B
E
C
R148 NC
12
R133
C62
22p
RH1
P1
0
3
F1
C63
10p
C164
10p
C165
Q3
Q1
NC
D23
D26
NC
A K
NC
D24
A K
NC
D25
A K
D1
D4
D12
NC
D15
D22
*Q2
Q4
Q22
NC
Q23
NC
D16
NC
CN1
1
2
3
4
2
3
4
5
R2
NC
*C166
1u
TAM_CSn
TAMIC_CSn
SPIDI
SPIDO
SPICLK
TAMIC_CSn
ROW0
RESET
LE
SIO
SK
RDI
TDO
RFCLK
LOW_RAD
TAM_CLK
ROW1
ROW2
KEY0
KEY1
WP
ROW0
Charge +
Charge -
DC_IN
GND
JTAG
RX
TX
for NL
for JT
for TG7200/8200
for BR
for BR
IC1
IC7
BBIC
(1)
(2)
(3)
(4)
(5)
(8)
(9)
(11)
(10)
(6)
(7)
NC: No Components
KX-TG8227UA
SCHEMATIC DIAGRAM (Base Unit_Main)
74
KX-TG8227UAB/KX-TG8227UAR/KX-TG8227UAW/KX-TGA820RUB/KX-TGA820RUR/KX-TGA820RUW/KX-TGA820UAB/KX-TGA820UAR/KX-TGA820UAW
12.3. Schematic Diagram (Base Unit_Operation)
C
C
LED2
1
2
LED1
1
2
SKIP
1
2
VOL_UP
1
2
STOP
1
2
ANS_ON
1
2
ERASE
1
2
REPEAT
1
2
VOL_DOWN
1
2
LOCATOR
1
2
PLAY1
1
2
PLAY
1
2
CN10-10
CN10-9
CN10-8
CN10-7
CN10-6
CN10-5
CN10-4
CN10-3
CN10-2
CN10-1
ANSWER ON
PLAY
KX-
TG8227
SCHEMATIC DIAGRAM (Base Unit_Operation)
75
KX-TG8227UAB/KX-TG8227UAR/KX-TG8227UAW/KX-TGA820RUB/KX-TGA820RUR/KX-TGA820RUW/KX-TGA820UAB/KX-TGA820UAR/KX-TGA820UAW
Memo
76
KX-TG8227UAB/KX-TG8227UAR/KX-TG8227UAW/KX-TGA820RUB/KX-TGA820RUR/KX-TGA820RUW/KX-TGA820UAB/KX-TGA820UAR/KX-TGA820UAW
12.4. Schematic Diagram (Handset)
J1
J2
5.6n
F1
4
3
30u
C1
47u
L1
D1
1 2
6.3
330u
C2
100m
R45
Q1
1
3
2
100m
R1
68
R2
Q3
1
3
2
Q2
1
3
2
BATTERY
+4.2V
VDD3
+2.5V
+1.8V
VDD2
VDD1
L4
NC
D7
1 2
10k
R6
220k
R7
+2.5V
+1.8V
UTX
URX
GND
+2.5V
+4.2V
POWER
TP20
TP21
BAT
47
R71
1u
C29
+4.2V
BATTERY
+1.8V
C9
NC
LED1
LED-
J3
J4
VDD4
470
R5
100
R13
10k
R65
3.3k
R15
D8
2
1
Q7
B
C
E
1u
C15
C4
NC
+2.5V
100
R103
R96
N
C
100
R104
R104
C28
NC
100
R105
R97
NC
100
R106
R98
NC
R99
NC
100
R107
L7
Q12
B
C
E
Q5
B
C
E
59
LDO1_CTRL
61
P16/PON/
INT6
63
LDO1_sense
65
AVD2
67
LSRp/REF
69
VREFm
71
AGND
73
VREFp
4
VSS1
75
P14/*INT4
6
LED2/PWM1/P21
77
P22/CLK100
8
LED_BIAS/P36/PD6
79
ADC3
10
SCL1/P24
12
*INT2/P12
14
AVS
16
Xtal1
18
RFCLKp
20
VDDRF
22
TDO
24
SK
26
LE
28
P32/PD2
30
PAOUTm
32
PAOUTp
34
P33/PD3
36
TDOD/P35/PD5
38
VDDIO2
40
PCM_FSC/*INT0/P10
42
P01/URX
44
P03/SDA2
46
P05/SPICLK/PCM_CLK
48
P07/SPIDI/PCM_DIN
50
VDD3
52
P17/CHARGE/INT7
54
DC_STAB
56
DC_CTRL
58
VBAT1
60
LDO2_CTRL
62
P26/STOP_CHARGE
64
AVS2
66
*LSR/REF
68
*MIC
70
VBUF
72
MICp
1
*INT1/P11
3
VDD1
74
P30
5
LED1/PWM0/P20
76
P13/*INT3
7
LED3
78
AVS_sense
9
SDA1/P25
80
ADC0
11
*INT5/VDDE/P15
13
AVD
15
CAP
17
VSSRF
19
RSSI/RFCLKm
21
RFCLKd
2
VDDIO1
23
RDI
25
PD1/SIO
27
P31/PD1
29
VSSPA1
31
VDDPA
33
VSSPA2
35
P34/PD4
37
VSS2
39
VDD2
41
P00/UTX
43
P02/JTIO
45
P04/SCL2
47
P06/SPIDO/PCM_DOUT
49
VSS3
51
P23/ADC1
53
*RST
55
DC_I
57
DC_Sense
Q9
B
C
E
0
R152
NC
R153
+3.3V
D2
1 2
+3.3V
R167
NC
0
R168
SW1
1
2
36
5
4
7
8
INT
1 2
R
1 2
SHARP
1
2
0
1 2
AST
1 2
9
1
2
8
1
2
7
1
2
6
1
2
5
1
2
4
1
2
3
1
2
2
1
2
1
1
2
CANCEL
1 2
SP
1 2
S1
1 2
TALK
1 2
SOFT_C
1 2
SOFT_A
1 2
CN3
1
CN3
2
CN3
3
CN3
4
CN3
5
CN3
11
CN3
10
CN3
9
CN3
8
CN3
7
CN3
6
CN3
12
CN3
13
Q4
B
C
E
5.6k
R46
5.6k
R47
0
R
175
0
R
176
100
R95
NC
1k
R66
2.2u
C5
2.2u
C10
JTAG
CL1
CL2
R19
NC
+2.5V
39k
R11
1k
R62
0
R182
1k
R61
10k
R64
C161
NC
100n
C26
10k
R183
C3
C6
C8
220n
C23
NC
NC
C36
1n
C18
C96
NC
C97
NC
C19
C20
C21
0.1u
C22
C24
C25
C30
C84
0.1u
C119
C121
100p
C35
100p
C103
100p
C104
100p
C105
100p
C106
100p
C107
C38
C27
C34
C39
C120
100
R63
560
RA3
1
23
3
3
3
4
560
RA4
1
2
4
560
RA5
1
2
4
560
RA6
1
2
4
C7 12p
X1
1
3
2
LED11
A
K
LED10
A
K
LED8
A
K
LED6
A
K
LED7
A
K
LED5
A
K
LED9
A
K
LED4
A
K
L24
NC
4.7
R12
0
R195
1n
C168
0
R196
DC_I
AVS_sense
ADC3
URX
JTAG
ROW0
COL5
COL4
COL3
COL2
COL1
LE
SIO
SK
RDI
TD0
ADC3
AVS_sense
ROW3
ROW2
ROW1
KEY_LED
ROW1
ROW3
CHARGE
ROW2
RESET
RFCLK
LDO1_CTRL
LDO2_CTRL
URX
DC_CTRL
LCD_BACK
STOP_CHARGE
MIDI_SDA
MIDI_SCL
MIDI_SCL
COL0
KEY_LED
MIDI_IRQ
UTX
JTAG
LCD_BACK
LCD_CD
LCD_CSB
COL0
COL5
COL4
COL3
COL2
ROW0
COL1
LCD_CSB
LCD_SCL
LCD_CD
LCD_SDA
LCD_RESET
STOP_CHARGE
HEADSET_DET
UTX
MIDI_CS
LCD_RESET
LCD_SCL
LCD_SDA
R168 : NC
except RU/UA
R167 : NC
R168 :
R168 :
0
R167 :
0
for RU/UA
right
Left
Push
up
down
IC1
BBIC
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(16)
(10)
(11)
(12)
(13)
(14)
(15)
NC: No Components
1s
(When on charge)
Charge Current
TX DATA
RX DATA
384kHz
(Talk Mode)
3.3V
Backlight On 4.0V
Backlight Off 3.5V
Backlight Off 3.5V
2.5V
1.8V
0.65V
0V
300mVp-p
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