Sony DSX-A55BT / DSX-A55BTE Service Manual ▷ View online
DSX-A55BT/A55BTE
17
SECTION 4
TEST MODE
SETTING THE TEST MODE
Setting method:
1. In the state of source off (the clock is displayed on the liquid
1. In the state of source off (the clock is displayed on the liquid
crystal display), enter the test mode by pressing the buttons on
the remote commander in order of the [4] t [5] t [1] (press
the remote commander in order of the [4] t [5] t [1] (press
only the [1] button for two seconds).
2. It is set to the test mode, and all segments of the liquid crystal
display light.
Releasing method:
Press the [SOURCE
Press the [SOURCE
OFF] button for 1 second.
MICROPHONE AUDIO LOOPBACK
To confi rm the state of the internal microphone used when a
handsfree function is used, the microphone audio is output from
the speaker.
The breakdown judgment of the microphone can be done without
connecting H/F with the cellular phone.
To confi rm the state of the internal microphone used when a
handsfree function is used, the microphone audio is output from
the speaker.
The breakdown judgment of the microphone can be done without
connecting H/F with the cellular phone.
Procedure:
1. Enter the test mode.
2. Press the [SOURCE
1. Enter the test mode.
2. Press the [SOURCE
OFF] button to select the Bluetooth
Phone function.
3. On/off of the microphone audio loopback function changes
whenever the [ALBUM v 2] button is pressed (“ALBM” is
displayed in the liquid crystal display).
displayed in the liquid crystal display).
LOOP BACK
ALBM
ON
Lit
OFF
None
DSX-A55BT/A55BTE
18
MEMO
DSX-A55BT/A55BTE
DSX-A55BT/A55BTE
19
19
SECTION 5
DIAGRAMS
5-1. BLOCK DIAGRAM - MAIN Section -
1
9
J301
CN102 (1/2)
69
1
UDP1
LFOUT
4
DACOUT_L
POWER AMP
IC304
12
5
IN_FL
FL+
FL–
FL+
3
FL–
9
RL+
7
RL–
11 IN_RL
2
LROUT
56
ATT
68 UDM1
3 LVRIN
13 L3_IN_P
3
2
1
D+
D–
VBUS
USB VBUS
CN201
14 L3_IN_N
X12OUT
9 L1_IN
11
54
20
L2_IN
45 HIT2_SDA
46 HIT2_SCL
47 HIT2_RESET
46 HIT2_SCL
47 HIT2_RESET
76 BT_RX (A50)
75 BT_TX (A50)
83 BT_CTS (A50)
82 BT_RTS (A50)
65 BT_MUTE (A50)
84 BT_RESET (A50)
85 BT_POWER (A50)
75 BT_TX (A50)
83 BT_CTS (A50)
82 BT_RTS (A50)
65 BT_MUTE (A50)
84 BT_RESET (A50)
85 BT_POWER (A50)
R-CH
R-CH
J304
J303
(ANTENNA IN)
AUX
TU252
TUX-DSP03 (TUNER UNIT)
RF_ANT_IN
AUDIO_OUT_L
AUDIO_OUT_R
BT BOARD
MIC+_IN
MIC_OUT
LCH_P
LCH_N
SDA
SCL
RSTN
R-CH
ANT601
MIC601
RCH_P
RCH_N
UART_TX
UART_RX
UART_RTS
UART_CTS
UART_CTS
MUTE
RESET
MODULE_PON
MIX AMP
IC602
SIFDO
SDI
53
22
SIFDI
SDO
52
21
SIFCK
SCK
55
19
SIFCE
CE
22
MUTE
16
AC_GND
4
STBY
56
17
BUSYB
BUSY
86
16
CMDERR
CMD_ERR
62
23
USBINS1
USB_IN
47
25
SMON1
WDT_MON
51
18
RESETB
SYSRST
LINE AMP
IC302
MUTING
Q305
MUTING
Q303
X201
12MHz
75
74 X12IN
CENTER VOLTAGE
GENERATOR
IC303
+8.5V
MUTING
CONTROL
Q109, 110
57
AMP_MUTE
26
BEEP
58
AMPSTB
R-CH
4
12
FR+
FR–
2
10
RL+
RL–
R-CH
R-CH
R-CH
3
11
RR+
RR–
R-CH
R
FRONT
AUDIO OUT
L
R
REAR
L
MUTING
SWITCH
SWITCH
Q304
: USB
: TUNER
: AUX
SIGNAL PATH
: AUDIO
: Bluetooth
: MIC
R-ch is omitted due to same as L-ch.
USB CONTROLLER, INPUT SELECTOR,
AUDIO DSP, ELECTRICAL VOLUME
IC201
SYSTEM CONTROLLER
IC101 (1/2)
DSX-A55BT/A55BTE
DSX-A55BT/A55BTE
20
20
5-2. BLOCK DIAGRAM - DISPLAY/POWER SUPPLY Section -
REGULATOR
IC401
DC/DC CONVERTER
IC501
5
8
VDD (BACKUP5V)
VCC
9
FL
T_USB
12
EN_USB
4
EN_SYS
8
SYNC
16
18
CN102 (2/2)
3
VIN
9
VCC1
13
AMP12V
+B
FU101
19
5
AMP-REM
3 AUDIO 8.5V
2 AUDIO_EN
2 AUDIO_EN
6
ANT-REM
7
ACC
SYSTEM CONTROLLER
IC101 (2/2)
J101
(REMOTE IN)
X101
32.768kHz
88 RCIN1
80 RE-IN1
79 RE-IN0
79 RE-IN0
1 NOSE_SW
9 XOUT
8 XIN
2 SIRCS
92 KEYIN1
93
93
87
KEYIN0
SYS_ON
95 RC_IN0
99 LCD_SO
100 LCD_CLK
98 LCD_CE
89
FLT_USB
81
BT_MIC_ON (A50)
74
AUDIO_EN
73
SYS_EN
10
RESET
90
KEYACK0
KEYACK1
KEY BOARD
LCD_DATA
LCD_CLK
LCD_CE
SIRCS
KEY_1
KEY_0
KEY_0
RE_1
RE_0
RE_0
PANEL_SW
+3.3V
REGULATOR
IC102
+3.3V
REGULATOR
IC601
RESET SIGNAL
GENERATOR
IC105
B+ SWITCH
Q102
SYS+3.3V
BT+3.3V
+5V
REGULATOR
IC603
TU+5V
59
ILL_ON
+9V
REGULATOR
IC402
ILL+9V
AUDIO+8.5V
15 REG 3.3V
10 REG_EN
10 REG_EN
72
AMP_REM
48
EN_USB
24
SYNC_OUT
51
EN_SYS
50
12 AMP_EN
2 LX
7
USBIN
5 USBOUT
VDD+3.3V
USB VBUS
ACC_IN 55
BU_IN 66
BU B+
BU+3.3V
D404
D107
D106
BATTERY
CHECK
Q103
ACCESSORY
CHECK
Q106
BACK UP
VOLTAGE DETECT
Q101, 104
X102
7.92MHz
X102
7.92MHz
11 OSCOUT
13 OSCIN
Abbreviation
: Saudi Arabia model
EA
(EXCEPT EA)
(EA)
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