Sony DSX-A35U / DSX-A35UE Service Manual ▷ View online
DSX-A35U/A35UE
21
• IC Block Diagrams
– MAIN Board –
IC102 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-A35U/A35UE
22
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
DSX-A35U/A35UE
23
• IC Pin Function Description
MAIN BOARD IC101 R5F3650KCDZ94FB (SYSTEM CONTROLLER)
Pin No.
Pin Name
I/O
Description
1
NOSE_SW
I
Front panel remove/attach detection signal input terminal “L”: front panel is attached
2
SIRCS
I
Remote control signal input from the front panel block
3 to 5
NC
-
Not used
6
BYTE
I
External data bus width selection signal input terminal
7
CNVSS
I
Processor mode selection signal input terminal
8
XIN
I
Sub system clock input terminal (32.768 kHz)
9
XOUT
O
Sub system clock output terminal (32.768 kHz)
10
RESET
I
System reset signal input from the reset signal generator “L”: reset
For several hundreds msec. after the power supply rises, “L” is input, then it change to “H”
For several hundreds msec. after the power supply rises, “L” is input, then it change to “H”
11
OSCOUT
O
Main system clock output terminal (7.92 MHz)
12
VSS
-
Ground terminal
13
OSCIN
I
Main system clock input terminal (7.92 MHz)
14
VCC1
-
Power supply terminal (+3.3V)
15
NMI
I
Non-maskable interrupt signal input terminal Fixed at “H” in this unit
16
CMD_ERR
I
Command error signal input from the audio DSP “H”: error
17
BUSY
I
Busy signal input from the audio DSP “L”: busy
18
SYSRST
O
Reset signal output to the audio DSP “L”: reset
19
CE
O
Chip enable signal output to the audio DSP
20
SDI
I
Serial data input from the audio DSP
21
SCK
O
Serial data transfer clock signal output to the audio DSP
22
SDO
O
Serial data output to the audio DSP
23
USB_IN
I
USB device detection signal input from the audio DSP “L”: USB device is connected
24
SYNC_OUT
O
Frequency control signal output to the DC/DC converter
25
WDT_MON
I
Watch-dog timer status monitor input from the audio DSP
26
BEEP
O
Beep sound output to the power amplifi er
27, 28
NC
-
Not used
29
FW_TXD
O
Serial data output terminal for fl ash writing
30
FW_RXD
I
Serial data input terminal for fl ash writing
31
FW_CLK
I
Serial data transfer clock signal input terminal for fl ash writing
32
FW_BUSY
O
Busy signal output terminal for fl ash writing
33 to 38
NC
-
Not used
39
EPM
O
EPM signal output terminal Fixed at “L” in this unit
40 to 43
DEBUG_1 to
DEBUG_4
O
Debug terminal Not used
44
CE
O
Chip enable signal output terminal Fixed at “H” in this unit
45
HIT2_SDA
I/O
Two-way serial data bus with the tuner unit
46
HIT2_SCL
O
Serial data transfer clock signal output to the tuner unit
47
HIT2_RESET
O
Reset signal output to the tuner unit “L”: reset
48
EN_USB
O
USB power on/off control signal output to the DC/DC converter “H”: power on
49
NC
-
Not used
50
FLT_USB
I
USB power fault status signal input from the DC/DC converter
51
EN_SYS
O
VBUS power on/off control signal output to the DC/DC converter “H”: power on
52
IPOD
O
Not used
53
NC
-
Not used
54
TELATT
I
Telephone attenuator detection signal input terminal Fixed at “L” in this unit
55
ACC_IN
I
Accessory power detection signal input terminal
56
ATT
O
Audio muting on/off control signal output terminal “H”: muting on
57
AMP_MUTE
O
Amplifi er muting on/off control signal output to the power amplifi er “H”: muting on
58
AMPSTB
O
Standby signal output to the power amplifi er “L”: standby
59
ILL_ON
O
Power on/off control signal output terminal for illumination LED “H”: power on
60
VCC2
-
Power supply terminal (+3.3V)
61
NC
-
Not used
62
VSS
-
Ground terminal
63, 64
NC
-
Not used
65
BT_MUTE (A50)
I
Muting on/off control signal input from the Bluetooth section Not used
66
BU_IN
I
Back-up power detection signal input terminal
67 to 71
NC
-
Not used
DSX-A35U/A35UE
24
Pin No.
Pin Name
I/O
Description
72
AMP_REM
O
Amplifi er remote output on/off control signal output terminal “H”: output on
73
SYS_EN
O
System power on/off control signal output terminal “H”: power on
74
AUDIO_EN
O
Power supply on/off control signal output terminal for audio section “H”: power on
75
BT_TX (A50)
O
Serial data output to the Bluetooth section Not used
76
BT_RX (A50)
I
Serial data input from the Bluetooth section Not used
77, 78
NC
-
Not used
79
RE-IN0
I
Jog dial pulse signal input from the rotary encoder (A phase input)
80
RE-IN1
I
Jog dial pulse signal input from the rotary encoder (B phase input)
81
BT_MIC_ON (A50)
O
Power supply on/off control signal output terminal for microphone signal Not used
82
BT_RTS (A50)
O
Return to send signal output to the Bluetooth section Not used
83
BT_CTS (A50)
I
Clear to send signal input from the Bluetooth section Not used
84
BT_RESET (A50)
O
Reset signal output to the Bluetooth section Not used
85
BT_POWER (A50)
O
Power supply on/off control signal output to the Bluetooth section Not used
86
NC
-
Not used
87
SYS_ON
O
System power on/off control signal output terminal “L”: power on
88
RCIN1
I
Rotary commander shift key input terminal
89
KEYACK0
I
Key acknowledge signal (wake up signal) input from the rotary commander
90
KEYACK1
I
Key acknowledge signal (wake up signal) input from the front panel block
91
NC
-
Not used
92, 93
KEYIN1, KEYIN0
I
Front panel key input terminal
94
AVSS
-
Ground terminal (for A/D converter)
95
RC_IN0
I
Rotary commander key input terminal
96
AVRH
-
Reference voltage terminal (+3.3V) (for A/D converter)
97
AVDD
-
Power supply terminal (+3.3V) (for A/D converter)
98
LCD_CE
O
Chip enable signal output to the front panel block
99
LCD_SO
O
Serial data output to the front panel block
100
LCD_CLK
O
Serial data transfer clock signal output to the front panel block
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