Sony ICD-U50 Service Manual page 29

BLOCK DIAGRAM
IC101
MIC AMP
OUT 6
MIC 4
IN+
901
STBY 3
IN–
5
MIC CONTROL
SP901
(SPEAKER)
J101
i
S701
CONTROL
KEY
S703–705
FUNCTION
KEY
S702 (REC)
FUNCTION
KEY
ON
S707
DPC
OFF
ON
S706
HOLD
OFF
LCD
MODULE
BACK-
LIGHT
VDD
(REC)
(PLAY)
ICD-U50/U60/U70
IC701
SYSTEM CONTROLLER
89 MIP
56 AGPIO4
Q102
57
AGPIO5
1 SPOUTP
99 SPOUTN
97 HSSPOUTP
96 LOUTO
77 DGPIO11
Q101, 103, 104
27 BGPIO13
HP MUTE CONTROL
59
AGPIO7
61 AGPIO9
62
EGPIO7
64 EGPIO9
65
EGPIO10
AGPIO8
60
63
EGPIO8
66
EGPIO15
58 AGPIO6
D704 D703
D705
74 DGPIO14
76 DGPIO12
75 DGPIO13
VDD
/CS
32 EGPIO12
SCLK
33 EGPIO13
SDA
34 EGPIO11
A0
35 EGPIO7
/RES
16 RSTN
14 DCDCIN
VCC
D702
R
24 BGPIO2
G
23 BGPIO1
IC702
NAND FLASH MEMORY
BGPIO0 17 9 CE
18 17
BGPIO3 ALE
BGPIO4 19 16 CLE
BGPIO10 38 7 R/B
52 8
DRDN RE
DWRN 53 18 WE
29
I/O0
42
DGPIO7
32
41
49
DGPIO0 I/O7
44
DGPIO9 40
CGPIO3 29 VCC
–DATA
USBM 11
USBP 10 +DATA
GND
DGPIO15 73
REAL TIME CLOCK
DGPIO8 41 1 INT
AGPIO10 80 6 SCL
AGPIO11 81 5 SDA
AGPIO3 55 9 CLKOE
XIN 5
D501
X701
4.096MHz
XOUT 6
+2.1V
1
IC503
REG
CE
3
VOUT
1
IC502
REG
CE
3
VOUT
VCC+2.8V
DCIN1/1BAT 87
3 3
• Signal Path
IC703
IC504
DC-DC CONVERTER
LBI 1
7 OUT
SHDN 4
D504
4
VIN
IC501
BOOST CONVERTER
D502
VBAT 6
4 2
VIN VOUT
LBI 7
EN 1
IC505
LOW VOLTAGE
DETECTOR
2 VIN VOUT 1
CONTROLLER
IC506
HIGH VOLTAGE
DETECTOR
2 VIN VOUT 1
CONTROLLER
ICD-U50/U60/U70
: PB
: REC
DRY BATTERY
SIZE "AAA"
(IEC DESIGNATION LR03)
1PCS 1.5V
Q501
VOLTAGE
Q502
VOLTAGE