Sony DSX-A55BT / DSX-A55BTE Service Manual ▷ View online
DSX-A55BT/A55BTE
DSX-A55BT/A55BTE
25
25
5-6. SCHEMATIC DIAGRAM - MAIN Section (2/3) -
• See page 21 for Waveforms. • See page 27 for IC Block Diagrams. • See page 29 for IC Pin Function Description.
Note 3: When the complete BT board is replaced, it is necessary to confi rm
operation. Refer to “BLUETOOTH FUNCTION CHECKING
METHOD USING A CELLULAR PHONE” on page 5.
METHOD USING A CELLULAR PHONE” on page 5.
Note 2: When the BT board is defective, exchange
the complete mounted board.
Note 4: When IC101 on the MAIN board is replaced, the destination setting
is necessary. Refer to “NOTE OF REPLACING THE COMPLETE
MAIN BOARD OR SYSTEM CONTROLLER (IC101)” on page 4.
MAIN BOARD OR SYSTEM CONTROLLER (IC101)” on page 4.
Note 1: When the KEY board is defective, exchange the
FRONT PANEL ASSY (Ref. No. FP1).
MAIN
(3/3)
BOARD
3
MAIN
(1/3)
BOARD
2
IC B/D
2
3
IC B/D
4
(0) [0]
(0) [3.3]
(0) [3.3]
(8.5) [8.5]
3.3
0
0
0
0
(3.3) [3.3]
3.2
3.3
3.3
3.3
3.3
3.3
3.3
(3.3) [3.3]
3.3
3.3
3.3
2.5
2.3
3.2
0
0
0
0
3.2
3.2
0
1
0
0
3.2
0.1
0
0
1.5
3.2
3.3
3.2
3.2
3.2
1.6
1.5
1.4
0
0
3.2
(3.3) [3.3]
0
0
0
3.2
3.3
3.3
3.3
3.3
3.3
3.3
3.3
3.3
0
0
(3.3) [3.3]
(3.2) [3.2]
(0) [3.3]
(0) [0]
(0) [0]
3.2
3.3
0
3.2
3.2
10.2
5.1
14.3
3.3
5.1
1
1
5.1
5.8
1.5
3.3
0
1
3.3
5.8
39k
R505
0.01
C509
16V
100
C517
100k
R506
0.1
C516
1
C502
C606
0.01
C607
1
C605
1
C603
0.1
J101
JL101
10k
R143
32.768KHz
X101
4
3
1
2
IC105
VOUT
Vdd
NC
VSS
CL014
CL013
CL012
CL011
3.3k
R133
3.3k
R130
CL015
CL016
CL017
CL018
CL019
CL020
CL021
CL022
CL023
CL024
C608
0.1
R513
470
22
C511
10
C508
100
R501
82k
R507
MM1836A33NRE
IC601
1
CONT
2
GND
3
NOISE
4
VOUT
5
VIN
R602
4.7k
25V
47
C518
470
R502
0.01
C513
680p
C510
R516
470
220k
R504
R503
10k
1k
R173
18p
C157
22p
C158
R612
0
E
10uH
L501
47uH
L502
R115
100k
100
R214
220k
R177
10M
R176
10
C504
10
C505
220k
R303
2.2
C514
0.01
C515
8.2k
R509
FB101
FB102
FB103
47k
R222
0
R803
0
R804
10
C160
DB2441600L
D501
82k
R508
DZ2J068M0L
D601
IC501
OZ539IGN-A1-0-TR
1 BST
2 LX
3 VIN
4 EN_SYS
5 USB_OUT
6 FB_US
7 USB_IN
8 SYNC
9
FLT_USB
10
ISET_USB
11
VIC_USB
12
EN_USB
13
SS_SYS
14
GNDA
15
RT
16
VREF
LTA014EUBFS8TL
Q102
IC101
R5F3650KCDZ93FB
1
NOSE_SW
2
SIRCS
3
NC
4
NC
5
NC
6
BYTE
7
CNVSS
8
XIN
9
XOUT
10
RESET
11
OSCOUT
12
VSS
13
OSCIN
14
VCC1
15
NMI
16
CMD_ERR
17
BUSY
18
SYSRST
19
CE
20
SDI
21
SCK
22
SDO
23
USB_IN
24
SYNC_OUT
25
WDT_MON
26
BEEP
27
NC
28
NC
29
FW_TXD
30
FW_RXD
31
FW_CLK
32
FW_BUSY
33
NC
34
NC
35
NC
36
NC
37
NC
38
NC
39
EPM
40
DEBUG_1
41
DEBUG_2
42
DEBUG_3
43
DEBUG_4
44
CE
45
HIT2_SDA
46
HIT2_SCL
47
HIT2_RESET
48
EN_USB
49
NC
50
FLT_USB
51
EN_SYS
52
IPOD
53
NC
54
TELA
TT
55
ACC_IN
56
AT
T
57
AMP_MUTE
58
AMPSTB
59
ILL_ON
60
VCC2
61
NC
62
VSS
63
NC
64
NC
65
BT_MUTE(A50)
66
BU_IN
67
NC
68
NC
69
NC
70
NC
71
NC
72
AMP_REM
73
SYS_EN
74
AUDIO_EN
75
BT_TX(A50)
76
BT_RX(A50)
77 NC
78 NC
79 RE-IN0
80 RE-IN1
81 BT_MIC_ON(A50)
82 BT_RTS(A50)
83 BT_CTS(A50)
84 BT_RESET(A50)
85 BT_POWER(A50)
86 NC
87 SYS_ON
88 RCIN1
89 KEYACK0
90 KEYACK1
91 NC
92 KEYIN1
93 KEYIN0
94 AVSS
95 RC_IN0
96 AVRH
97 AVDD
98 LCD_CE
99 LCD_SO
100
LCD_CLK
C604
1000p
RB751V40,1
15
D1
15
CN103
15P
3
RE_1
2
GND
10
LCD_CLK
13
GND
7
SIRCS
4
RE_0
14
NC
11
ILL
1
GND
8
LCD_DATA
5
KEY_1
15
GND
12
PANEL_SW
9
LCD_CE
6
KEY_0
R156
100
R153
100
R158
100
R154
100
R155
100
100
R159
100
R161
100
R160
R165
100
0.01
C144
0.01
C143
R149
100k
1k
R167
470
R157
1k
R162
100
R195
100
R189
100
R193
100k
R183
100
R190
100
R187
1k
R200
100
R197
100
R390
100
R186
100
R191
100
R169
100k
R172
100k
R168
100k
R175
1k
R132
1k
R131
100
R185
R138
100k
10k
R140
10k
R139
1000p
C149
1000p
C151
0.01
C152
1000p
C150
100k
R184
C155
0.1
100k
R101
100
R206
100
R204
100
R207
100
R209
100k
R212
100
R208
10k
R216
100k
R213
100
R211
100
R210
100
R215
100k
R221
100k
R220
100k
R219
100
R203
R152
100
100
R174
100
R171
R179
100
100k
R194
100k
R202
100k
R198
0.01
C252
0.01
C161
C136
0.1
16V
C609
10
C601
0.1
R601
0
R603
2.2k
C602
4.7
47k
R335
FL
T_USB
EN_USB
EN_SYS
BT_LCH_P
BT_LCH_N
BT_RCH_N
BT_RCH_P
BT_RTS
BT_CTS
BT_TX
BT_RX
BT_MUTE
BT_RTS
BT_RESET
AMP_REM
AUDIO_EN
SDO
SCK
CE
HIT2_RST
FLT_USB
EN_USB
P
ANEL_DET
RE_1
RE_0
KEY_0
LCD_SO
LCD_CLK
SDI
USB_IN
LCD_SO
LCD_CLK
BT_RX
BT_MIC_ON
BT_MIC_ON
BT_POWER
BUSY
WDT_MON
BT_RESET
KEY_1
KEY_1
SIRCS
LCD_CE
SYS_EN
CMD_ERR
BT_POWER
RE_0
HIT2_SCL
SYSRST
SYNC
RE_1
KEY_0
BT_CTS
EN_SYS
LCD_CE
PANEL_DET
SYNC
JL102
JL103
JL104
JL105
JL106
JL107
JL108
SIRCS
BT_TX
HIT2_SDA
FW_BUSY
FW_TXD
FW_RXD
CNVSS
FW_CLK
BT_MUTE
BUIN
ACC_IN
CN101
8P
3
RE_1
2
CLK
7
FLASH_W
4
TXD (UCOM–›JIG)
1
RESET
8
GND
5
RXD (JIG–›UCOM)
6
BU3.3V
FW_CLK
FW_TXD
CNVSS
FW_BUSY
FW_RXD
IC101
SYSTEM CONTROLLER
RESET SIGNAL
IC105
IC501
DC/DC CONVERTER
IC601
+3.3V REGULATOR
MAIN BOARD (2/3)
10
11
12
13
14
15
16
17
18
19
20
21
24
26
22
23
25
17
15
12
LCH_P
13
LCH_N
14
18
MIC_OUT
RCH_N
16
MIC-_IN
11
AU_GND
MIC+_IN
RCH_P
DGND
10
3
8
2
7
9
5
1
4
6
UART_TX
DGND
MODULE_PON
UART_RX
UART_CTS
MUTE
3.3
UART_RTS
RESET
BT
BOARD
MIC601
ANT601
KEY
BOARD
(REMOTE IN)
15
6
12
J
17
3
G
K
13
4
F
5
2
7
C
H
I
11
14
16
E
9
L
B
8
A
10
D
1
GENERATOR
B+ SWITCH
(NC)
PST8628UL
X102 7.92MHz
X102 7.92MHz
1M
R181
*
*R180
R180
0 (EXCEPT EA)
100 (EA)
39p
C159
39p
C162
(EA)
(EXCEPT EA)
(Page 24)
(Page 26)
DSX-A55BT/A55BTE
DSX-A55BT/A55BTE
26
26
5-7. SCHEMATIC DIAGRAM - MAIN Section (3/3) -
• See page 27 for IC Block Diagrams.
(2/3)
BOARD
MAIN
3
(1/3)
BOARD
MAIN
1
IC B/D
IC B/D
IC B/D
IC B/D
3.3
8.5
5
14.3
3.3
0
5
14.3
3.3
12.2
3.3
9
3
14.3
5
0
0.6
0
3.2
6.8
0
6.8
0
5
3.3
0
14
14
14
0
3.7
0
7.2
3.3
14.3
3.6
3.6
3.6
3.6
3.6
3.6
7.2
7.2
7.2
7.2
7.2
7.2
7.2
14.3
3.7
GN1G
D402
GN1G
D403
GN1G
D401
R106
1k
2SC4154TP-1EF
Q104
1k
R107
R105
220k
0.01
C110
25V
47
C105
22
R118
GN1G
D404
GN1G
D405
MM1836A33NRE
IC102
1
CONT
2
GND
3
NOISE
4
VOUT
5
VIN
10
C403
C407
10
10
C408
10k
R404
10k
R403
2SC3052EF-T1-LEF
Q106
DA2J10100L
D1
16
150
R336
16V
10
C319
6.3V
1000
C106
C119
1
C404
1
1
C409
1
C332
0
R337
100
R356
1
C340
10
C410
1
C406
140uH
L401
LV56831P-E
IC401
1
NC
2
AUDIO_EN
3
AUDIO 8.5V
4
NC
5
VDD(BACKUP5V)
6
IKVDD
7
NC
8
VCC
9
VCC1
10
REG_EN
11
IKREG
12
AMP_EN
13
AMP12V
14
GND
15
REG 3.3V
S-1142B90I-E6T1U
IC402
1
VOUT
2
VSS
3
ON/OFF
4
NC
5
VSS
6
VIN
0.47
C102
0.47
C101
0.22
C330
0.22
C318
0.22
C412
100k
R405
16V
220
C411
16V
C122
100
DZ2J075M0L
D106
Z2J18000L
D107
Z2J18000L
D114
CN102
16P
1
FL+
2
RL+
3
RR+
4
FR+
5
AMP-REM
6
ANT-REM
7
ACC
8
GND
9
FL–
10
RL–
11
RR–
12
FR–
16
+B
13
TEL-ATT
14
ILL
15
TEST
17
+B
18
+B
19
+B
LTC044EUBFS8TL
Q101
LTC014YUBFS8TL
Q110
LTC014EUBFS8TL
Q103
LTA014EUBFS8TL
Q109
LTC014EUBFS8TL
Q304
C401
16V
3300
PURE5001H-4WX
IC304
1
TA
B
2
PW_GND2(FL)
3
FL–
4
STBY
5
FL+
6
VCC2
7
RL–
8
PW_GND1(RL)
9
RL+
10
RIPPLE
11
IN_RL
12
IN_FL
13
PRE_GND(BEEP?)
14
IN_FR
15
IN_RR
16
AC_GND
17
RR+
18
PW_GND3(RR)
19
RR–
20
VCC1
21
FR+
22
MUTE
23
FR–
24
PW_GND4(FR)
25
HSD
1
C320
1
C321
1
C322
1
C323
1
C324
1
C325
1
C326
1
C327
1
C328
1
C349
1
C350
220
R322
220
R324
220
R325
220
R323
10k
R117
10k
R114
10k
R334
47k
R111
47k
R116
4.7k
R112
47p
C329
10k
R407
BUIN
AMP_REM
AUDIO_EN
SYS_EN
ACC_IN
POWER AMP
IC304
1
2
3
4
5
6
9
8
7
16
12
18
10
11
14
13
15
20
19
17
(3/3)
MAIN BOARD
IC402
+9V REGULATOR
IC401
REGULATOR
IC102
+3.3V REGULATOR
32V
FU101
10A
MUTING SWITCH
Q109, 110
MUTING CONTROL
BATTERY CHECK
ACCESSORY CHECK
Q101, 104
BACK UP
VOLTAGE DETECT
15
6
12
J
17
3
G
13
4
F
5
2
7
C
H
I
11
14
16
E
9
B
8
A
10
D
1
(E, MX, AR, IND)
PW1
PW1
(AR, RU)
(E, EA, MX, IND)
TO
CN102
FR+
FR+
MAX 0.3A
RR–
5
ACC
BATT
2
16
8
2
3
RL+
FL+
FL–
FR–
2
1
BATT
15
7
7
4
RR+
1
FL+
12
3
RL–
GND
RL–
1
3
RL+
13
ANT REM
6
11
6
6
ACC
7
FR–
RR+
GND
8
FL–
ANT REM
9
10
4
4
RR–
14
5
8
5
AMP REM
TO
CN102
FRONT LCH (+)
12
REAR LCH (+)
3
7
6
GND
2
BATT
15
REM OUT
MAX 0.4A
10
8
FRONT RCH (+)
1
11
REAR RCH (–)
REAR RCH (+)
FRONT LCH (–)
4
5
16
9
REAR LCH (–)
14
ACC
13
FRONT RCH (–)
(Page 24)
(Page 25)
Ver. 1.1
DSX-A55BT/A55BTE
27
• IC Block Diagrams
– MAIN Board –
IC102, 601 MM1836A33NRE
VOUT
4
CONT 1
GND 2
NC 3
VIN
5
+
–
VOLTAGE
REFERENCE
REGULATOR
CURRENT
LIMIT
THERMAL
SHUTDOWN
BIAS
IC304 PURE5001H-4WX
TAB
1
PW-GND2
2
OUT2–
3
ST-BY
4
OUT2+
5
VCC2
6
OUT1–
7
PW-GND1
8
OUT1+
9
SVR
10
IN1
11
AC-GND
16
OUT3+
17
PW-GND3
18
OUT3–
19
VCC1
20
OUT4+
21
MUTE
22
OUT4–
23
PW-GND4
24
HSD
25
IN3
15
IN4
14
S-GND
13
IN2
12
HIGH SIDE
DRIVER
IC401 LV56831P-E
NC
1
NC
4
NC
7
VCC
8
VCC1
9
AUDIO_EN
2
REG_EN
10
IKREG
11
AMP_EN
12
AMP
13
GND
14
AUDIO
3
+
–
VDD
5
IKVDD
6
REG
15
+
–
+
–
+
–
START
UP
VREF
OVER VOLTAGE
PROTECTION
THERMAL
SHUTDOWN
OUTPUT
CONTROL
DSX-A55BT/A55BTE
28
IC402 S-1142B90I-E6T1U
VOUT 1
ON/OFF 3
VIN
6
NC
4
VSS
5
VSS 2
+
–
–
OVERCURRENT
PROTECTOR
THERMAL
SHUTDOWN
REFERENCE
VOLTAGE
ON/OFF
CONTROL
IC501 OZ539IGN-A1-0-TR
BST 1
LX 2
FLT_USB
9
VIN 3
EN_SYS 4
USBOUT 5
ISET_USB
10
RT
15
VREF
16
FB_USB 6
USBIN
2V
UVLS
7
SYNC 8
GNDA
14
VIC_USB
11
SS_SYS
13
EN_USB
12
HDR
+
OSCILLATOR
REFERENCE
GENERATOR
OVER CURRENT
PROTECTION
VS
SEL
Q
S
R
R
ADJUSTMENT
GENERATOR
CHARGE
PUMP
OVER-CURRENT
LIMIT
USB FAULT
PROTECITON
VOUT_SYS (USBIN)
FAULT PROTECTION
+
–
+
–
+
–
+
–
–
IC603 NJM2884U2-05 (TE2)
5
VIN
4
VOUT
2
GND
3
N.C.
1
CONTROL
BANDGAP
REFERENCE
THERMAL
PROTECTION
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