Samsung SGH-P400 Service Manual page 19

SG H- P400 F low Chart of Troubleshooting
VCCD
U400
R401
12
10 1
NO2 V+
AOUTAP
9 2
COM2 NO1
SPK1P
8 3
IN2 COM1
7 4
NC2 IN1
YMU_SPK1P
6 5
GND NC1
C409
R407
1UF
10K
MICI N
R409
MICOUT
56K
C410
VCCA
NC
R411
680
C416
C415
33UF
NC
R412
2.2K
C417
R413
AUXI N
10K
1UF
R415
56K
AUXOUT
C418
NC
VCCA
R418
18K
Q400
2
R420
10K
R400
100K
R402
12
AOUTAN
SPK1N
AUDIO_AMP_EN
YMU_SPK1N
C400
100NF
MAIN_MI C
C420
C411
8PF
33PF
R410
2.2K
VCCD
R419
1K
EAR_SWITCH
3
1
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25 24 23 22 21 20
26
D1
D(1)
27
D(0)
D0
28
CP_WEN
/WR
29
U401
/CS
YMU_EN
30
A0
A(0)
31
/RD
CP_OEN
32
IOVDD
C405
NC
1 2 3 4 5 6
C407
220PF
CLK13M_YMU
YMU_LED
YMU_IR Q
RST
AOUTBN
JACK_IN
AOUTBP
C4018 C4019
1NF 1NF
3- 8
19 18 17
VBAT
16
15
SPVDD
14 R403
EQ3
R404
120K
13
82K
EQ2
C401
R405
33K
12 120PF
C403
EQ1
22NF
11
C421
HPOUT- R
R421
C404
4.7NF
56K
10 4.7UF
HPOUT-L/MONO
6.3V
7 8 9
C408
100NF
VCCD
C412
4.7UF
6.3V
C413 C414
1NF 100NF
CN401
EAR_SPK_N
6
EAR_MIC_N
5
JACK_I N
4
3
EAR_SPK_ P
2
EAR_MIC_P
1
R414 0
R416
C4020
NC
150PF
C419 150PF
R417 NC
C402
100NF