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(1)
(2)
(3)
(4)
C508
6.3V
10uF
R508
10
C503
K1.0
(5)
C594
NC
C526
K0.1
R505
NC
R506
NC
R507
NC
R509
100k
RX
TX
UART
R543
270k
(6)
C373
330u 6.3
C372
K1.0
(7)
(8)
(9)
(10)
(11)
*R436
1k
*R431
NC
*R433
1k
*C433
K6800P
*R434
R417
390
PDN
AVR, PDN_IC
IC371
NC
4
VSS
VOUT
5
NC L511
2.7V
2.7V
3.1V
DC/DC step-up circuit
3.0V
2.6~3.0V
IC372
L373
10uH
K
A
3
4
VBAT1 VBAT2
S
NC
2
5
F301
5.6n
G
D
1
6
VSS1
VSS2
BATTP
1
5
EXT
VOUT
2
BATTN
VDD
3
4
VSS
ON/*OFF
3.1V
IC373
Charging detection
KX-TG9331CT/KX-TG9332CT/KX-TG9333CT/KX-TG9334CT/KX-TGA931CT
Voice circuit
SPPP
L431
NC
L432
NC
*L434
*C435
10uF
RA403
3
2
4
1
68
*R435
NC
2.2k
C414
K6800P
RA401
3
2
4
1
1k
C415
RA402
K6800P
3
2
4
1
2.2k
IC374
2.0V_Reset
R374
220k
ONOFF
1
OUT
VSS
3
2
VDD
NC
2
VIN
1
R366
D361
R370
K
A
1.2
R368
10k
Q364
Q362
R369
C
B
B
33k
E
KX-TGA931 SCHEMATIC DIAGRAM (Handset_Main)
23
TEST SIGNAL
FREQUENCY: 1kHz
SPPN
SP phone RX
(MIC Mute: ON)
1
+
1.8Vp-p/8
2
-
(Vol. Max)
SP_PHONE
Headset TX
50mVp-p/600
*CN431
1
2
3
4
5
HEADSET_JACK
Headset RX
170mVp-p/150
(Vol. Max)
SPP
RECEIVER
Handset RX
(MIC Mute: ON)
1
+
2
590mVp-p/150
-
(Vol. Max)
SPM
MICM
MICM-1
MIC-TP
2
1
MIC
MIC-TP
MICP
MICP-1
Handset TX
88mVp-p/600
IN
SP phone TX
4
30mVp-p/600
IN
3
Charging control circuit
3.3k
L351
NC
Q361
R361
47k
L352
NC
R363
47k
C
Q531
C
R531
NC
B
E
E
NC: No Components
IN
CHG1
CHG2
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