Read Panasonic KX-TCA285RU Service Manual online
53
KX-TCA285RU
KX-TCA285
58 MAIN BOARD No.1 2/2
(1)
(2)
(3)
(4)
(3)
(4)
(5)(6)
(8)
(7)
(9)
(10)
(11)
(12)
(14)
(14)
(15)
(16)
(16)
(17)
(13)
13.824MHz
TX_RF
RX_RF
TX_RF
TX_RF
RX_RF
RX_RF
SP-phone_RX
Handset_RX
SP-phone_TX
Handset_TX
6
5
8
7
CHG_DET
VIB_CTRL
C326
NC
C313
10p
D301
NC
D300
NC
GND
C328
1000P
GND GND
GND GND
C327
NC
C314
NC
SP-PHONE_SPEAKER
+
-
C321
L302
C316
1000p
C320
470P
C322 1000P
1000P
L303
L300
C16
NC
GND
GND
VBAT_3.0V
VBAT_3.0V
GNDA
GNDA
GNDA
GNDA1 GNDA1 GNDA1
GNDA1
GNDA
GNDA
GNDA
GNDA
GNDA
GNDA
GNDA
SPP
SPM
MIC+
MIC-
GNDA
GND
GND
GND
GND
GND
L305
L304
L301
C325
GNDA
VCCA
HEADSET_DET
VCCA
C17
NC
R14
R301
390
R305
R304
R302
0.039u
(1608)
3.3k
R303
2.2k
R317 10
R314
100
D304
4.3V
4.3V
D305
D302
4.3V D303
4.3V
R308
R309
100k
100k
C315
10u (1608)
C18
1u
CN301
1
4
2
3
5
C311
NC
C49
10p
GND
GND
GND
GND
GND
C48
10p
ANT_TP1
1 2
GND
GND
GND
GND
LNA_INN
GND
GND
RX_SW
GND
GND
C44 0.2p
LNA_INP
BAL_OUT1
ANT1
C50
10p
ANT_TP2
1
2
ANT2
BAL_OUT2
GND
GND
GND
VCC_PA
C36
10p
TX_SW
REV-
REV+
C312
NC
RA301
120p
1
2
3
4
R306
C310
22u (2125)
GND
C51
10p
L40
NC
GND
C319
NC
C318
NC
1.5p
C43
NC
C31
1.5p
L32 1.5n
D51
D50
GND
GND
CL1
CL2
CL3
ZA2
1
4
ZA3
1
2
3
2
3
4
C331
R316 0
R320
NC
1k
2.2k
2.2k
0
X1
13.824M
1
2
4
4
3
MIC
AP1
1
2
C52
3p
GND
GND
L38
L42 0
L33
10p
C47
4.7n
4.7n
C41
5p
C54
2.2p
L21
C53
1.5p
L34
5.1n
C34
1.8p
C35
1.8p
C37
1.5p
C32
0.5p
C30
0.5p
R321
C55
NC
L30 4.7n
L31 6.8n
C42
3p
L36
7.5n
C45
0.8p
C46 10p
180n
180n
10p
C324
C323
1.5p
1.5p
C317
47u
L35 2.7n
L39
1.2p
C33
1.2p
C
E
B
A
D
F
MIC POWER
RECEIVER+
RECEIVER-
HEADSET_DET
Headset_MIC+
Speakerphone_SP+
Speakerphone_SP-
MIC+
MIC-
Headset_RECEIVER
GAP
GAP
Receiver
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