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SERVICE MANUAL
Sony Corporation
Connect Company
Published by Sony Engineering Corporation
US Model
Canadian Model
ICD-SX25/SX25VTP
AEP Model
UK Model
E Model
Chinese Model
ICD-SX25
IC RECORDER
9-879-465-02
2005J16-1
© 2005.10
Ver. 1.1 2005.10
SPECIFICATIONS
ICD-SX25/SX25VTP
Recording media
Built-in flash memory 32 MB Stereo/
Monaural recording
Recording time
· ST: 1 hr. 25 min.
· STLP: 2 hr. 45 min.
· SP: 4 hr. 20 min.
· LP: 11 hr. 35 min.
Frequency range
· ST: 60 Hz - 13,500 Hz
· STLP: 60 Hz - 6,900 Hz
· SP: 60 Hz - 7,000 Hz
· LP: 80 Hz - 3,500 Hz
Speaker
Approx. 16 mm (21/32 in.) dia.
Power output
150 mW
Input/Output
· Microphone jack (minijack, stereo)
­ input for plug in power, minimum input level
0.6 mV, 3 kilohms or lower impedance microphone
· Headphones jack (minijack, stereo)
­ output for 8 - 300 ohms headphones
· USB connector
· DC IN 3V jack (For Korean and the People's
Republic of China models, this jack does not exist.)
Playback speed control
+100% to -50% (DPC)
Power requirements
Two LR03 (size AAA) alkaline batteries: 3 V DC
Dimensions (w/h/d) (not incl. projecting parts and controls)
28.0
× 120.0 × 13.8 mm (1 1/8 × 4 3/4 × 9/16 in.)
Mass (incl. batteries)
64 g (2.26 oz)
Supplied accessories
Stereo headphones
× 1
USB connecting cable
× 1
Application Software (CD-ROM)
× 1
LR03 (size AAA) alkaline batteries x 2*/ Carrying
pouch x 1* (*For the ICD-SX25 sold in the USA and
Canada only)
Your dealer may not handle some of the above listed optional accessories. Please
ask the dealer for detailed information.
Design and specifications are subject to change without notice.


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2
ICD-SX25/SX25VTP
TABLE OF CONTENTS
1.
GENERAL ................................................................... 3
2.
DISASSEMBLY
2-1.
Disassembly Flow ...........................................................
4
2-2.
Cover (jack) .....................................................................
4
2-3.
Case Block Assy ..............................................................
5
2-4.
AUDIO Board, Microphone Unit (MIC2/3) ....................
5
2-5.
Ornament Belt, SW Board ...............................................
6
2-6.
Cover (chassis) Block Assy .............................................
6
2-7.
MAIN Board, Liquid Crystal Display Panel ...................
7
3.
TEST MODE ............................................................... 8
4.
DIAGRAMS
4-1.
Block Diagrams ­ MAIN Section-1 ­ ............................ 12
4-2.
Block Diagrams ­ MAIN Section-2 ­ ............................ 13
4-3.
Block Diagrams ­ PANEL Section ­ ............................. 14
4-4.
Printed Wiring Board ­ MAIN Board ­ ......................... 15
4-5.
Schematic Diagram ­ MAIN Board (1/2) ­ ................... 16
4-6.
Schematic Diagram ­ MAIN Board (2/2) ­ ................... 17
4-7.
Printed Wiring Board ­ AUDIO Board ­ ....................... 18
4-8.
Schematic Diagram ­ AUDIO Board (1/2) ­ ................. 19
4-9.
Schematic Diagram ­ AUDIO Board (2/2) ­ ................. 20
4-10. Printed Wiring Board ­ SW Board ­ .............................. 21
4-11. Schematic Diagram ­ SW Board ­ ................................. 22
5.
EXPLODED VIEWS
5-1.
Case Block Assy .............................................................. 30
5-2.
Chassis Block Assy ......................................................... 31
6.
ELECTRICAL PARTS LIST .................................. 32
Flexible Circuit Board Repairing
· Keep the temperature of the soldering iron around 270 °C
during repairing.
· Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
· Be careful not to apply force on the conductor when soldering
or unsoldering.
Notes on chip component replacement
· Never reuse a disconnected chip component.
· Notice that the minus side of a tantalum capacitor may be
damaged by heat.
Replacement of IC6001 and IC7003 used in this set requires
a special tool.
·The voltage and waveform of CSP (chip size package) cannot
be measured, because its lead layout is different from that of
conventional IC.
·
Lead layouts
surface
Lead layout of
conventional IC
CSP (chip size package)
UNLEADED SOLDER
Boards requiring use of unleaded solder are printed with the lead-
free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with
the lead free mark due to their particular size)
: LEAD FREE MARK
Unleaded solder has the following characteristics.
· Unleaded solder melts at a temperature about 40 °C higher
than ordinary solder.
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
about 350
°C.
Caution: The printed pattern (copper foil) may peel away if
the heated tip is applied for too long, so be careful!
· Strong viscosity
Unleaded solder is more viscou-s (sticky, less prone to flow)
than ordinary solder so use caution not to let solder bridges
occur such as on IC pins, etc.
· Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder. Operating instructiondd


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3
ICD-SX25/SX25VTP
SECTION 1
GENERAL
This section is extracted
from instruction manual.
1 i
(headphones) jack (17, 19)
2
Built-in microphone (11, 13)
3
DIRECTNL (directional)
switch (13)
4
VOICE UP (Digital Voice
Up) switch (29)
5
DPC ON/OFF switch (30)
6
Display window (23)
7
ERASE button (36)
8
DIVIDE/
(bookmark)
button (32, 39)
9
A-B
(repeat)/PRIORITY
button (33, 43)
0
OPR (operation) indicator
(11, 19)
Refer to the pages indicated in parentheses for details.
Front
qa
z REC (record) /REC
PAUSE button (11, 34)
qs
x STOP button (12, 20)
qd
Jog lever
FOLDER/MENU/
.(review/fast backward)/
> (cue/fast forward)/
x· B (play/stop·enter)
qf
VOL (volume) +/­ buttons
(19)
Rear
qg
Base
qh
HOLD switch (28, 50)
qj
Speaker
qk
Battery compartment (6)
ql
Clip*
w; m
(microphone) jack (16)
wa
USB connector (55)
ws
DC IN 3V jack (6)
(For Korean and the People's
Republic of China models,
this jack does not exist.)
wd
Slit for a handstrap
*Notes
· To prevent the clip from
breaking, avoid hooking it on
thick fabric, such as a pocket
of a heavy coat.
·When bending down or
running with the unit clipped
on your pocket, be careful not
to drop the unit.
You need to set the clock to use the alarm function or record the date and
time.
Clock setting display appears when you insert batteries for the first time,
or when you insert batteries after the unit has been without batteries for a
certain period of time. In this case, proceed from step 4.
1 Turn the jog lever toward
MENU.
The menu mode will be displayed in
the display window.
2 Press the jog lever up or down
(>/.) to select "SET DATE".
3 Press the jog lever (x·B).
The date and time setting window is
displayed. The year digits will flash.
4 Set the date.
1
Press the jog lever up or down
(>/.) to select the digits of
the year.
Jog lever
Press the center
(x·B).
Press up (>).
Press down (.).
Turn toward MENU.
2
Press the jog lever (x·B).
The month digits will flash.
3
Set the month and day in
sequence, then press the jog lever
(x·B).
The hour digits will flash.
5 Set the time.
1
Press the jog lever up or down
(>/.) to select the digits of
the hour.
2
Press the jog lever (x·B).
The minute digits will flash.
3
Set the minute.
4
Press the jog lever (x·B).
The menu mode will be
displayed again.
Note
If you do not press the jog lever
(x·B) for more than one minute,
the clock setting mode is cancelled
and the window will return to
normal display.
6 Turn the jog lever toward
MENU.
The window will return to normal
display.
1
If the unit is left unused for more than 3
seconds in the stop mode after the clock
is set, the display will show the current
time (page 26).
v


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4
ICD-SX25/SX25VTP
Note: Follow the disassembly procedure in the numerical order given.
2-2. COVER (JACK)
SECTION 2
DISASSEMBLY
2-1. DISASSEMBLY FLOW
Note: Disassemble the unit in the order as shown below.
2-3.CASE BLOCK ASSY
(Page 5)
2-4.AUDIO BOARD,
MICROPHONE UNIT(MIC2/3)
(Page 5)
2-5.ORNAMENT BELT,
SW BOARD
(Page 6)
2-6.COVER (CHASSIS)
BLOCK ASSY
(Page 6)
2-7.MAIN BOARD,
LIQUID CRYSTAL DISPLAY
PANEL (Page 7)
2-2.COVER (JACK)
(Page 4)
SET
4
screw
6
screw
5
cover (jack)
3
lid (connecter)
2
screw (M1.4)
1
battery lid


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5
ICD-SX25/SX25VTP
2-3. CASE BLOCK ASSY
1
Slide the chassis from the case until the connector becomes visible.
3
Slide the chassis from the case completely and remove it.
Pass the flexible board through
the hole during assembling.
2
connector
11pin (CN7005)
2-4. AUDIO BOARD, MICROPHONE UNIT (MIC2/3)
7
Remove the microphone unit (MIC2/3)
from the groove.
5
Remove soldering at two positions of the speaker cable.
2
1
connector
(CN7201)
3
LCD holder
4
liquid crystal
display panel
three claws
6
connector
4pin (CN3001)
8
AUDIO board