Main Section (2/4) (Pha-1A) - Sony PHA-1A Service Manual

3-4. SCHEMATIC DIAGRAM - MAIN Section (2/4) (PHA-1A) -
1 2
MAIN BOARD
A
B
>004S
PWR_CTRL
MAIN
(Page 12)
BOARD
(1/4)
>007S
C
PWR_CTRL
MAIN
(Page 14)
BOARD
(3/4)
VDDN50_VC
>008S
PGND
MAIN VDD50_VB
D
BOARD
VDDN50_VE
(3/4)
(Page 14) VDD50_VD
E
F
HP_XMUTE1
HP_XMUTE1
HP_XMUTE2
HP_XMUTE2
>002S DACOUT_LP
DACOUT_LP
DACOUT_LN
MAIN DACOUT_LN
BOARD DACOUT_RP
DACOUT_RP
(1/4)
DACOUT_RN
(Page 12) DACOUT_RN
G
>009S
V_OUT
MAIN
BOARD
H
(4/4)
(Page 15)
I
CN001
8P
JL031
VOUT 8
JL030
LIN 7
JL033
WR1
PWR_CTRL 6
JL032
LOUT 5
VOLUME
JL034
BOARD
GND 4
JL035
RIN 3
GND 2
J
JL036
ROUT 1
PHA-1A/1AEU
• See page 16 for IC Block Diagrams.
3 4 5 6
(2/4)
C8
R119 R219
100
R4 1k 1k
6.3V
1M
C021 C5
0.01 0.1
0
PWR_CTRL 5
R5
1k
GAIN_SW -2 -1
S001 C11
0.1
GAIN
NORMAL
C14
100
HIGH
6.3V
0 1
2
3
GND
5 4
V+
C19 C20
1 1
R104
3k
DACOUT_LN
R102
3k
DACOUT_LP
C1 C2 R101 C101
100 0.1 2.4k 470p
6.3V
C4 C3 R201 C201
100 0.1 2.4k 470p
6.3V
R202
3k
DACOUT_RP
R204
3k
DACOUT_RN
PWR_CTRL
R316
100k
7 8 9
IC201
GAIN CONTROL
IC201
TS12A12511DCNR
1 8
OPAMP_RIN
2 7 -4.9
V– OPAMP_ROUT
3 6 0 GAIN_SW
GND
4 5
V+ NC_5
IC101
GAIN CONTROL
OPAMP_LOUT -4.9
IC101
TS12A12511DCNR
OPAMP_LIN
8
7 -4.9 -4.9
V–
6 0
5
R115
NC_5
200k
C35 C17
1 1
R106
2.4k
C103 R107
R105 470p 100
150
OPAMP_LOUT
C102
R103
0.0039
150
C106
22
OPAMP_LIN
10V
HP_LIN
IC001
AUDIO AMP
IC002
IC001
LME49860MAX/NOPB
HEADPHONE AMP
TPA6120A2DWPR
R203
150
C202
0.0039 R205
150
C203
R206 470p
HP_RIN
2.4k
OPAMP_RIN
R207
100
OPAMP_ROUT
C206
22
10V
13 13
10 11 12
IC003
DC SERVO
IC003
LMP7708MAX/NOPB
1 8 5
V+
0 2 7 -4.9
0 3 6 0
4 5 0
V–
R215
200k
C207
1
C104
R141 R116 R117
1
200k 0 10
C050
R114
0.1
1k
6
R111 R113
C27
22k 150k D
0.1
C15
10 S G
R118 R112
16V
1
0 1k
C13
0.1
C16
10
16V
C052
0.1
IC002
C9
0.1
C26
10
16V
C7
0.1
C10
10
R218 R212
0 1k 16V
R211 R213 C208 R321
22k 150k R214 R217 1 100k
1k 10
R320
22k
R241 R216
C204
200k 0
1
6 4
D G S
SSM6N58NU, RSONYF
MUTING SWITCH
S G D
1 3
Note: The following parts on the MAIN board cannot replace with single.
PHA-1A/1AEU
Ver. 1.1
13 14 15
R318
100k
R319
22k
4
G S
Q002
SSM6N58NU, RSONYF
MUTING SWITCH
D
3
CN002
3P
WR2
CL301
1 LEFT
CL303
FB001
2 GND
CL302
3 RIGHT
FB002
FB003
0
Q001
When these parts are damaged, replace the complete mounted board.
IC001, IC002, IC003, IC101, IC201, Q001, Q002
16
HP JACK
BOARD