Sony ICD-SX25 / ICD-SX25VTP Service Manual ▷ View online
21
21
ICD-SX25/SX25VTP
ICD-SX25/SX25VTP
4-10. PRINTED WIRING BOARD – SW BOARD – •
:Uses unleaded solder.
B
AUDIO BOARD
CN7005
(Page 18)
1-860-642-
11
(11)
1-860-642-
11
(11)
SW BOARD
(SIDE A)
SW BOARD
(SIDE B)
DPC
OFF
ON
OFF
VOICE UP
ON
OFF
DIRECTNL
ON
FOLDER/MENU/
.
.
/>/x•B
x
STOP
z
REC/REC PAUSE
VOL
22
22
ICD-SX25/SX25VTP
ICD-SX25/SX25VTP
4-11. SCHEMATIC DIAGRAM – SW BOARD –
(Page 20)
ET7001
S906
VOICE UP
S907
DIRECTNL
S908
DPC
R908
R909
R907
C902
S905
C901
R904
R905
R903
R902
R901
S901
S902
VOL
S903
S904
z
REC/REC PAUSE
x
STOP
CN7006
22k
33k
1k
4700p
4700p
33k
22k
4.7k
3.3k
2.2k
11P
FOLDER/MENU
.
.
/>/x•B
23
ICD-SX25/SX25VTP
• IC Block Diagrams
– AUDIO Board –
IC1001, 2001, 3002 NJM2781RB1
1
2
3
4
8
7
6
5
REG
GND
V+
OUT
IN-
NOISE
REG
STBY
IN+
IC3003 MM3111AWLE
1
2
3
4
8
7
6
5
BIAS
VDD/2
AV=-1
VO2
GND
VDD
VO1
XSHUTDOWN
BYPASS
+IN
-IN
IC3004 AK4566VN-L
7
8
14
13
12
11
10
9
28
22
23
24
25
26
27
5
6
4
3
2
1
15
17
16
18
19
20
21
AUDIO I/F
CONTROLLER
CONTROL
REGISTER
PDN
CSN
CCLK
HP AMP
MOUT
CDTI
LRCK
MCLK
BICK
SDTI
SDTO
DVDD
DVSS
HVSS
HVDD
HPR
AINL1
AINR1
AINL2
AINR2
A
VDD
A
VSS
VCOM
VREF
LIN
RIN
MIN
MOUT
MUTET
HPL
IPGA & ADC
DAC
ADC
DAC
HPF
DATT
VCOM
VREF
BOOST
IPGA
AINL1
AINL2
AINR1
AINR2
1/2
1/2
1/2
3-STATE
BUFFER
1
3
2
6
4
5
FOUT
VDD
XXT
VSS
XT
XCONT
RF
CG
CD
A
B
C
D
IC6003 NJU6366AF1 (TE1)
24
ICD-SX25/SX25VTP
– MAIN Board –
IC5003 XC9502B092AR
1
2
3
4
RAMP WAVE
GENERATOR1
RAMP WAVE
GENERATOR2
EXT1
VDD
FB1
PWM1
5
10
9
8
7
6
EN1
EXT2
GND
FB2
PWM2
EN2
EN1 TO
INTERNAL CIRCUIT
VREF1=0.9V
WITH SOFT START1,
EN1
VREF1=0.9V
WITH SOFT START2,
EN2
PWM/PFM
CONTROLLER1
PWM/PFM
CONTROLLER2
OSC
GENERATOR
EN2 TO
INTERNAL CIRCUIT
PWM
COMPARATOR1
PWM
COMPARATOR2
ERROR AMP1
ERROR AMP2
IC7001 BU2090FS-E2
1 2
3
5 6 7 8
10
16 15 14 13 12 11
CONTROL
CIRCUIT
12 BIT
SHIFT
REGISTER
12 BIT
STORAGE
REGISTER
VDD
HPMUTE
XLIGHT2
MONOMIC
XBATTEN
XDSPRST
XFLMPWR
9
XADAPDN
SPAMP
XSTMIC
XREDLED
XGRLED
4
XLIGHT1
CLK
DATA
VSS
OUTPUT
BUFFER
(OPEN DRAIN)
IC7004 RX-4591CF
1
2
3
4
VDD
FOE
XIRQ
T1
5
10
9
8
7
6
FOUT
CE
CLK
DO
DI
CE
CLK
DO
DI
CE
CLK
DO
DI
GND
FOUT
CONTROLLER
DIVIDER
OSC
32.768kHz
INTERRUPTS
CONTROLLER
BUS
INTERFACE
CIRCUIT
CONTROL
REGISTER
AND
SYSTEM
CONTROLLER
TIMER
REGISTER
CLOCK
AND
CALENDAR
ARARM
REGISTER
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