Sony ICDST-25 Service manual

ICD-ST25

SERVICE MANUAL

Ver 1.0 2004.03

SPECIFICATIONS

Recording media Built-in flash memory 32MB,

Recording time See page 11. Frequency range • ST: 80 Hz - 13,500 Hz

Speaker Approx. 28 mm (1 Power output 300 mW Input/Output • Microphone jack (minijack, stereo)

Playback speed control +100% to -50% (DPC) Power requirements Two LR03 (size AAA) alkaline batteries: 3 V DC Dimensions (w/h/d)

Mass (incl. batteries) 75 g (2.65 oz) Supplied accessories Stereo Ear Receiver × 1

Design and specifications are subject to change without notice.

Stereo/Monaural recording

• SP: 80 Hz - 7,000 Hz

• LP: 80 Hz - 3,500 Hz

– 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 ear receiver

–

• USB connector

•

DC IN 3V jack (excluding the Korean and the People’s Republic of China models)

(not incl. projecting parts and controls)

41.5 × 103.6 × 13.3 mm (1 11/16 × 4 1/8 × 17/

USB Connecting cable × 1 Application Software (CD-ROM) × 1 Carring Case x 1 LR03 (size AAA) alkaline batteries × 2*

*For the United States model only

/8 in.) dia.

US Model

Canadian Model

AEP Model

UK Model

Korea Model

Tourist Model

in.)

9-877-590-01

IC RECORDER

Sony Corporation

Personal Audio Company Published by Sony Engineering Corporation

ICD-ST25

1. GENERAL ·········································································· 3

2. DISASSEMBLY

2-1. Case Block Assy ··························································· 4 2-2. F-SW Board ·································································· 5 2-3. MAIN Board ································································· 5 2-4. S-SW Board, Microphone Block Assy ························· 6 2-5. Microphone Unit··························································· 7 2-6. The Cautions At The Time Of A Microphone

Block Assy··································································· 8

3. TEST MODE······································································ 9

4. DIAGRAMS

4-1. Block Diagrams

– MAIN Section -1 – ·················································· 13 – MAIN Section -2 – ·················································· 14

– PANEL/POWER Section –······································ 15 4-2. Printed Wiring Board – MAIN Board (Side A) – ······· 16 4-3. Printed Wiring Board – MAIN Board (Side B) – ······· 17 4-4. Printed Wiring Board – F-SW Board –······················· 18 4-5. Printed Wiring Board – S-SW Board –······················· 19 4-6. Schematic Diagram – MAIN Board (1/5) – ··············· 20 4-7. Schematic Diagram – MAIN Board (2/5) – ··············· 21 4-8. Schematic Diagram – MAIN Board (3/5) – ··············· 22 4-9. Schematic Diagram – MAIN Board (4/5) – ··············· 23 4-10. Schematic Diagram – MAIN Board (5/5) – ··············· 24 4-11. IC Pin Function Descriptions······································ 29

5. EXPLODED VIEWS

5-1. Upper Lid Block ························································· 34 5-2. Case Block ·································································· 35

6. ELECTRICAL PARTS LIST······································· 36

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 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 con ventional IC.

• Lead layouts

surface

Lead layout of

conventional IC

Unleaded solder

Boards requiring use of unleaded solder are printed with the leadfree 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 viscous (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.

CSP (chip size package)

Index to Parts and Controls

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.

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.

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 27).

Refer to the pages indicated in parentheses for details.

Front

SECTION 1

GENERAL

Rear

ICD-ST25

This section is extracted from instruction manual.

1 Built-in microphone (12, 14) 2 Built-in microphone (12, 14) 3 OPR (operation) indicator

(12, 20)

4 DIRECTNL (directional)

switch (14)

5 ERASE button (37) 6 A-B

button (34, 44)

7 DIVIDE/

button (33, 40)

8 Display window (24) 9 DPC ON/OFF switch (31)

Step 2: Setting the Clock

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.

Turn the jog lever toward MENU.

The menu mode will be displayed in the display window.

Press the jog lever up or down (>/.) to select “SET DATE”.

(repeat)/PRIORITY

(bookmark)

Jog lever

Press down (.).

0 Speaker

K zREC (record) /REC

PAUSE button (12, 35)

L xSTOP button (13, 21) M Jog lever

FOLDER/MENU/

.(review/fast backward)/ > (cue/fast forward)/ x• B (play/stop•enter)

N VOICE UP (Digital Voice

Up) switch (30)

O VOL (volume) +/– buttons

(20)

Press up (>).

Turn toward MENU.

Press the center (x•B).

qh USB connector (56) qj m (microphone) jack (17) qk i (headphones) jack (18, 20) ql HOLD switch (29, 51) w;

DC IN 3V jack (6)

For Korean and the People’s

( Republic of China Models, this jack does not exist.)

Battery compartment (6)

Press the jog lever (x•B).

The date and time setting window is displayed. The year digits will flash.

Set the date.

1 Press the jog lever up or down

>/.

( the year.

) to select the digits of

ICD-ST25

Note : Disassemble the unit in the order as shown below.

SET

2-1. CASE BLOCK ASSY (Page 4)

SECTION 2

DISASSEMBLY

2-3. MAIN BOARD (Page 5)

2-4. S-SW BOARD, MICROPHONE BLOCK ASSY (Page 6)

2-5. MICROPHONE UNIT (Page 7)

Note : Follow the disassembly procedure in the numerical order given.

2-1. CASE BLOCK ASSY

two screws

(+B 1.7

2-2. F-SW BOARD (Page 5)

two claws

claw

Remove two solders

of the MAIN board.

two claws

claw

case block assy

claw

flexible board

2-2. F-SW BOARD

two screws

(1.7 × 2.5)

speaker (2.8cm)(SP3001)

tapping screw

(1.7 × 2.5)

F-SW boar

ICD-ST25

2-3. MAIN BOARD

MAIN board

upper lid block assy

flexible board of

microphone unit

flexible board

case assy

claw

ICD-ST25

2-4. S-SW BOARD, MICROPHONE BLOCK ASSY

ornament (L)

S-SW board

button (5D)

microphone block assy

tapping pan screw

(M1.4

ornament (R) block ass

lid (connector)

2-5. MICROPHONE UNIT

Microphone part is turned in the direction of arrow A,

and it removes in the direction of arrow

screw hole part

microphone cushion

microphone cover

microphone uni

microphone case

ICD-ST25

adhesive sheet

Microphone unit flexible

board is removed.

pan

tapping screw

(M1.4

click plate

pan

(M1.4

microphone base

tapping screw

4.5)

ICD-ST25

2-6. THE CAUTIONS AT THE TIME OF A MICROPHONE BLOCK ASSY

microphone unit

flexible board

microphone base

It inserts in a microphone base.

screw hole part

It turns in the direction of an arrow.

click plate

microphone cover

pan

tapping screw

(M1.4

microphone cushion

microphone unit

microphone case

4.5)

pan

tapping screw

(M1.4

microphone base

SECTION 3

DSP STEREO through mode / MIC : L / MUTE : ON / VOL-LEVEL : 12

t "L / on / 12 / DSP ST"

DSP MONO through mode / MIC : H / MUTE : OFF / VOL-LEVEL : 23

t "H / oF / 23 / DSP MO"

1k sine wave output mode / MUTE : ON / VOL-LEVEL : 06 t "on / 06 / SIN"

DSP MO SIN DSP ST

AU IO DSP ST

DSP MO

DSP ST

SIN

(select), (set)

x x x

x B

TEST MODE

ICD-ST25

[Setting Method of the Test Mode]

To enter the test mode, turn on the HOLD . switch while pressing the x key and VOL+ key at the same time with the power on.

[Exiting Method of the Test Mode]

Exit the test mode by turning off the power.

[Initial Status of the Test Mode]

When the test mode is set, the LCD display appears as shown below .

LCD display (Example)

101

01ST25

69 101 01 ST25

Iris(DSP) version : 69 SakuraR(CPU) version : 1.01 LPEC ST version : 01 Model code : ST25

[Flow Chart of the Test Mode]

START

TEST MODE

RST

KEY

COUNT

USB

LED

BATTKEY

AU IO

LCD

SLEEP

BEEP

RTC

Initial status of test mode

Model code, LPEC ST,

F/W version display

[Operation in the Test Mode]

After entering the test mode, you can move within the test menu by pressing the . / > key. You can move to the submenu by pressing the x•B key. Then each test mode can be executed.

1. LCD test

• LCD is tested of all light-on and all light-off.

x B x B

LCD

ALL

LCD

OFF LCD CHK LCD ALL LCD

CBA

STSP

★ ★

★

888888

D E

REC

888

MM DS

(select), (set)

(LCD off)

x x x

CHK

START

CHK

END

2. Audio test

Perform the through-playback and sine wave output.

• Contents of the submenu DSP ST: DSP STEREO through mode DSP MO: DSP MONO through mode SIN: 1 kHz sine wave output mode

• Select the microphone sensitivity with the A-B HtLtHtLtHt

...

switch.

•The VOR detection operation can be checked by the LED. Sound: The red LED is turned on. No sound: The red LED is

turned off.

• MUTE can be set to “ON” or “OFF” with the ERASE key.

•The sound volume can be adjusted with the VOL+ key or

VOL- key during the audio test except the MUTE mode.

• In the directional microphone selection, ON/OFF of the

DIRECTNL switch is performed with the DIVIDE key. DIRECTNL switch ON : The green LED is turned on.

OFF : The green LED is turned off.

• In the audio test mode the operation is performed according to

JACK detection.

•The microphone sensitivity, sound volume and MUTE (on/off)

are displayed on the LCD.

•The microphone sensitivity selection and the VOR test are

effective in the through-playback mode.

•The directional microphone selection is effective in the DSP

MONO through mode.

Turn off the power (Extract the batteries or DC jack)

END

TEST MODE

ICD-ST25

LED

x B

USB

OFF

VBUS

LINK

HOLD.

Suspend mode

cut Vbuscut Vbus

Vbus

x B

RST

KEY

PUSH INIT

ALL

All keys are entered

In the case that the initialization and reset operation end correctly.

(blinking)

x B

3. Sleep test

•Pressing the x•B key causes the set to enter the sleep state.

•When the HOLD . switch is ON, the LCD is turned off. When OFF, the LCD is turned on.

•Press any keys to exit the sleep state.

x B

(with HOLD.

OFF status)

SLEEP

x B

(with HOLD.

ON status)

SOON

INSLEEP

(LCD OFF)

any keys any keys

4. Beep test

• Beep sound of 1.3 kHz or 2 kHz is output.

x B

BEEP 1.3K

2.0K

1.3K

: :

(select), (set)

x B

1.3K 2.0K

x x

7. Battery remaining power and DC IN test

•The detected A/D value (hexadecimal) of the battery remaining power is displayed. When DC jack is inserted, the battery mark on the LCD is turned off.

DC jack

x B

BATTBATT BATTBATT

is inserted

DC jack is extracted

8. LED test

• LEDs (OPR: red and green, BL: green) are all turned on.

9. USB test

• When the menu starts the USB self-check, either presence or absence of the Vbus is judged. (Vbus is present: “ON VBUS”, Vbus is absent: “OFF VBUS”)

•The USB driver always works re gardless of presence or absence of the USB signal only when Vbus is available during the USB test. At this time, turning on HOLD . causes the set to mov e to the suspend state. Turning of f the Vb us causes the set to return to the test menu.

• In the menumode if the Vbus is supplied, any key will not w ork. Therefore the Vbus will be supplied after surely pressing the x•B key.

5. RTC test

•Perform the function test of the RTC and EEPROM. (1) RTC EEPROM test

Confirmation of writing, reading (verifying) and erasing of arbitrary data with the specified registers.

(2) RTC clock function test

Confirmation that RTC updates the time to the microcomputer at one second interval.

• OK, NG judgement is performed to the test result. When NG, it is displayed which device RTC or EEPROM becomes NG.

(All OK : "RTC OK" / RTC NG : "RTC BAD" / EEPROM NG : "EEP BAD")

x B

RTC

6. Key entry test

•When the any key is pressed, the entry ke y and the A/D converted

value (hexadecimal) of the three channel keys are displayed.

•When the x key is pressed, the A/D value of the ke y is displayed

while the key is depressed. When the key is released, the screen returns to the test menu.

x B

oFFFF

KEYiFFKEY

10. Menu reset

•Pressing the x•B key causes the set to enter the menu

initialization standby state.

•When the following keys are all entered, the EEPROM initialization (returning setting in the menu and user name to default value) and formatting process (deleting all message files in the flash memory) are executed. At the same time, the W ak eUp signal is checked, too.

Check keys: VOL- , VOL+ , A-B , ERASE ,

DIVIDE , DPC ON , DPC OFF , . ,

x•B , > , FOLDER , MENU , x ,

z REC , HOLD

OFF ,

DIRECTNL ON

ON , HOLD

, and DIRECTNL

OFF, VOICE UP ON, VOICE UP OFF

• If all tests end in success, “-ALLOK-” is displayed. If initialization in the EEPROM is NG, “INIT. NG” appears.

•Turn off the power to exit the test mode.

11. Key durable test

•Pressing the x•B key makes the count to "------" and sets test

standby status. Once more pressing the x•B key mak es the count to "000000" and sets the key durable test. In this mode any key input and slide switch operation are counted and the number is displayed. Turn off the power to exit this mode.

any keys or slide switches operation

x B x B

KEY

COUNT

KEY

------

KEY

000000

Key durable test

KEY

000001

ICD-ST25

SECTION 4

DIAGRAMS

Note on Schematic Diagrams:

• All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or less are not indicated except for electrolytics and tantalums.

• All resistors are in Ω and 1/ specified.

•

• C : panel designation.

• A : B+ Line.

•Power voltage is dc 3V and fed with regulated dc power

•Voltages and waveforms are dc with respect to ground

•Voltages are taken with a VOM (Input impedance 10 MΩ).

•Wav eforms are taken with a oscilloscope.

• Circled numbers refer to waveforms.

• Signal path.

✩Replacement of IC6001 used in this set requires a spe-

• The voltage and waveform of CSP (chip size package)

: internal component.

supply from DC IN jack (J5001). under no-signal (detuned) conditions.

no mark : PB []: REC

Voltage variations may be noted due to normal production tolerances.

F : PB L : REC

cial tool. cannot be measured, because its lead layout is different

from that of conventional IC.

: Impossible to measure

∗

W or less unless otherwise

Note on Printed Wiring Boards:

• Y : parts extracted from the conductor side.

• b : Pattern from the side which enables seeing.

The other layers’ patterns are not indicated.

Caution: Pattern face side: Parts on the pattern face side seen from (SIDE B) the pattern face are indicated. Parts face side: Parts on the parts face side seen from (SIDE A) the parts face are indicated.

• MAIN board is multi-layer printed board. However, the patterns of intermediate-layer have not been included in the diagram.

✩Replacement of IC6001 used in this set requires a spe-

cial tool.

• Lead layouts

surface

Lead layout of

conventional IC

CSP (chip size package)

• WA VEFORMS

IC6003 3 (XXT)

88.5 ns

1 V/DIV, 40 ns/DIV

IC6003 1 (FOUT)

1 V/DIV, 40 ns/DIV

88.5 ns

3.3 Vp-p

4.1 Vp-p

IC3004 6 (MCLK)

1 V/DIV, 40 ns/DIV

IC7003 <z/, (XTAL)

1 V/DIV, 100 ns/DIV

88.5 ns

244 ns

4.1 Vp-p

3.4 Vp-p

IC8001 qd (X OUT)

(When the USB is connected)

8.33 ns

1 V/DIV, 40 ns/DIV

IC7004 5 (FOUT)

1 V/DIV, 10 µs/DIV

3.7 Vp-p

3.2 Vp-p

30.5 ns

4-1. BLOCK DIAGRAMS – MAIN SECTION -1 –

MIC1

(ZOOM)

MIC2

(L-CH)

MIC3

(R-CH)

J3001

PLUG IN POWER

Q3002

Q3004

IC3002

MIC AMP

IN+

REG

OUT

STBY

ICD-ST25

MICVCC

INTINL

INTINR

EXTINR

EXTINL

CTL1

IC3001

MIC AMP

OUTL

OUTR

INT/EXT

VCC

IC3004

ADC, DAC, HEADPHONE AMP

AINR2

STDO

BICK

LRCK

SDTI

AINL2

Q3001

Q5008

B+ SWITCH

AVDD

AINL1

AINR1

STDO

BCLK

LRCK

XRST

J3002

SP3001

(SPEAKER)

POWER AMP

VO1

VO2

D902

(OPR)

(REC/PB)

XBATTEN

IC3003

XSHUT-

DOWN

-IN

RED(REC)

GREEN(PB)

SI/PO DRIVER

MONOMIC

SPAMP

XREDLED

XGRLED

XBATTEN

CLK

DATA

IC7001

XADAPDN

XDSPRST

Q3003 MUTE

HPMUTE

XSTMIC

XLIGHT1

XLIGHT2

MCLK

CDTI

CCLK

MIN

CSN

IC6003

CLOCK GEN

FOUT

XXT XCONT

HPR

HPL

MOUT

PDN

X6001

11.2896MHz 5

D7002

(LCD PANEL LIGHT)

D7003

3 4

MCLK

IC7004

REAL TIME CLOCK

CLK

XIRQ

FOUT

Signal path

: PB

: REC

HPJACK

115

SPICLK

SPIDATA

IC7003 (1/3)

CPU

XMICJACK

DSPSYSCLK

102

XADACS

BEEP

100

AUSCK

AUSOT

10112116

AUSIN

RTCCS

X0A32K

111

XRTCINTR

1313

+ 29 hidden pages

Sony ICDST-25 Service manual

TABLE OF CONTENTS

GENERAL

DISASSEMBLY

2-1. CASE BLOCK ASSY

2-2. F-SW BOARD

2-3. MAIN BOARD

2-4. S-SW BOARD, MICROPHONE BLOCK ASSY

2-5. MICROPHONE UNIT

2-6. THE CAUTIONS AT THE TIME OF A MICROPHONE BLOCK ASSY

TEST MODE

DIAGRAMS

4-1. BLOCK DIAGRAMS – MAIN SECTION -1 –