Panasonic KX-TG3531BXS Service Manual page 89

(1)
(2)
R525 1k
(3)
(4)
(5)
C508
6.3V
R508
C503
(6)
C594
C526
K0.1
(7)
(8)
(9)
(10)
EEPROM
Writing
protection TR
R543
E
B
C
Q543
(11)
(12)
(13)
(14)
(15)
(16)
(17)
R431 10k
10uF
R433
R417
10
K1.0
PDN
NC
R505 NC
R506 NC
R507 NC
R509 100k
RX
TX
UART
DSP regulator
3.6~4.2 V
IC371
3.0 V
3.0V_REG
3 2
VIN
VOUT
VSS
1
VBAT2 VBAT1
270k
BATTP
BATTM
KX-TG3531BXS/KX-TG3531BXB/KX-TG3532BXS/TG3532BXB/KX-TGA351S/KX-TGA351B
Headset detection TR
Q431
C
B
E
C435
10uF
6.3V
R435
NC
C433 K6800P
1k
R434 2.2k
390
RA401
3 2
4 1
1k
RA402
3 2
4 1
2.2k
Reset circuit
Q521
C R522 C522
B
22k K0.1
E
Charging control circuit
R366 3.3k
D361
R370 1.2
2 1
Q361
R361 47k
VSS2 VSS1
Q363
C
C
B
B
E
E
Q362
KX-TGA351 SCHEMATIC DIAGRAM (Handset)
89
TEST SIGNAL
FREQUENCY: 1kHz
Voice circuit
Rear speaker
C427 D10P
L427 NC
+
-
L426 NC
CN431
L431 NC
1
L432
2
3
4
5
L434
HEADSET_JACK
SPP
Handset receiver
RA403
+
2 3
-
1 4
68
SPM
MICM
C414
6800P
2
MIC
1
C415
6800P
Microphone
MICP
IC521
1 4
OUT
VSS
2 3
VDD
NC
3.2V_Reset
L351 NC
L352 NC
R363 47k
C
R531 NC
B
E
Q531
Charging detection circuit
NC: No Components
SP phone TX
-43 dBm/600 IN
30 mVp-p
SP phone RX
(MIC Mute: ON)
1.8 Vp-p/8
(Vol. Max)
Headset TX
IN
-37 dBm/600
50 mVp-p
Headset jack
Headset RX
170 mVp-p/150
(Vol. Max)
Handset RX
(MIC Mute: ON)
590 mVp-p/150
(Vol. Max)
Handset TX
-33 dBm/600 IN
88 mVp-p
CHG1
CHG2