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2008L04-1

© 

2008.12

Photo : ICD-SX68

Capacity (User available capacity)

ICD-SX68/SX68DR9: 512MB 
(approx. 483MB=507,346,944Byte)
ICD-SX78/SX78DR9: 1GB 
(approx. 975MB=1,022,590,976Byte)
ICD-SX88: 2GB 
(approx. 1.93GB=2,081,521,664Byte)
A part of the memory capacity is used as a 
management area.

Recording time

Frequency range

STHQ :  80 Hz - 20,000 Hz
ST :  80 Hz - 16,500 Hz
STLP :  80 Hz - 7,000 Hz
SP :  80 Hz - 6,000 Hz
LP :  80 Hz - 3,500 Hz

•

Bit rates and sampling frequencies for

Bit rate: 32 - 320 kbps, VBR
Sampling frequencies: 16/22.05/24/32/44.1/
48 kHz
Not all encoders are supported.

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

Headphone jack (minijack, stereo)

output for 8 - 300 ohms headphones

USB connector

Playback speed control

+200% to –75% (DPC)

Power requirements

Two NH-AAA rechargeable batteries: 2.4 V DC
Two LR03 (size AAA) alkaline batteries: 3.0 V DC

Operating temperature

5˚C - 35˚C (41˚F - 95˚F)

–

–

The maximum recording time of all the 
folders is as follows.

8 hr. 35 min.

22 hr. 50 min. 44 hr. 00 min.

69 hr. 40 min. 185 hr. 55 min.

17 hr. 25 min. 46 hr. 5 min.

88 hr. 45 min.

140 hr. 35 min. 374 hr. 55 min.

35 hr. 30 min. 93 hr. 55 min. 180 hr. 45 min.

286 hr. 10 min. 763 hr. 15 min.

(hr : hours/min. : minutes)

Dimensions (w/h/d) (not incl.
projecting parts and controls)(JEITA)*

30.8 × 119.3 × 14.9 mm (1 1/4 × 4 3/4 × 19/32 
in.)

Mass (JEITA)*

74 g (2.7 oz) including two NH-AAA
rechargeable batteries

* Measured value by the standard of JEITA

(Japan Electronics and Information
Technology Industries Association)

Supplied accessories

change without notice.

Rechargeable batteries (2)
Stereo headphones (1) (Except AEP)
USB connecting cable (1)
Application Software, Digital Voice
Editor (CD-ROM) (1)
Application Software, Dragon Naturally
Speaking (CD-ROM) 
(2) (SX68DR9: US/SX78DR9: E)
(3) (SX68DR9: Canadian)
(4) (SX78DR9: AEP)
Cradle (1) (SX68DE9/SX78DR9)
Stand (1) (AEP, E, Chinese, Korea)
Carrying pouch (1)

  ..................................................................   3

2-1.  Knob (HOLD), Speaker Assy (SP001) ...........................   6
2-2.  Chassis Assy, Case Assy .................................................   6
2-3.  Battery Case Lid .............................................................   7
2-4.  Cover (Chassis), MAIN Board .......................................   7
2-5. Chassis 

............................................................................   8

2-6.  SW Board, HPJACK Board ............................................   8
2-7.  MIC-A Assy, MIC-B Assy ..............................................   9
2-8.  Liquid Crystal Display Panel, AUDIO Board ................   9

TEST  MODE 

 ............................................................   10

4-1.  Block Diagram  - MAIN1 Section - ................................   13
4-2.  Block Diagram  - MAIN2 Section - ................................   14
4-3.  Printed Wiring Board  - AUDIO Board (Side A) - .........   15
4-4.  Printed Wiring Board  - AUDIO Board (Side B) - .........   16
4-5.  Schematic Diagram  - AUDIO Board (1/2) - ..................   17
4-6.  Schematic Diagram  - AUDIO Board (2/2) - ..................   18
4-7.  Printed Wiring Board  - MAIN Board (Side A) - ...........   19
4-8.  Printed Wiring Board  - MAIN Board (Side B) - ...........   20
4-9.  Schematic Diagram  - MAIN Board (1/5) - ....................   21
4-10.  Schematic Diagram  - MAIN Board (2/5) - ....................   22
4-11.  Schematic Diagram  - MAIN Board (3/5) - ....................   23
4-12.  Schematic Diagram  - MAIN Board (4/5) - ....................   24
4-13.  Schematic Diagram  - MAIN Board (5/5) - ....................   25
4-14.  Printed Wiring Boards  - HPJACK Board, SW Board - .   26
4-15.  Schematic Diagram  - HPJACK Board, SW Board - ......   27

5-1. Overall 

Assy 

....................................................................  38

5-2. Chassis 

Section 

...............................................................  39

  ..............................   40

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)

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 fl ow) 
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.

Notes on chip component replacement
• 

Never reuse a disconnected chip component.

• 

Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.

Flexible Circuit Board Repairing
• 

Keep the temperature of 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.

CAUTION
Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type.

GB

* Connect stereo ear receiver or stereo 

headphones supplied or not supplied to the 

i (headphone) jack. If unwanted noise is 
heard, wipe the headphones plug clean.

P Speaker
Q HOLD switch

**

R V-UP (Digital Voice Up) switch (37, 57)
S DPC switch (38, 51)
T DIRECTNL (directional) switch (24)
U

m

 (microphone) jack (31, 32)

V

(USB) connector (13, 64)

W Battery compartment (13)

** Slide the HOLD switch in the direction of 

the arrow to lock all the functions of all the 
buttons. During stop, “POWER SAVING…” 
will be displayed and the display will be 
turned off to prevent battery power from 
exhausting.

Refer to the pages indicated in 
parentheses for details.

1

i

 (headphone) jack* (21, 23, 34, 35, 

84)

2 Built-in microphones (stereo/

directional) (21, 25, 26)

3 Operation indicator (21, 25, 27, 29, 53)

4 Display window (10, 11)
5 DIVIDE/  (bookmark) button (31, 34, 

39)

6

 (folder)/MENU button

7

z

 (record/pause) button (21, 25, 26, 

27, 30)

8

x

 (stop) button (18, 22, 26, 28, 30, 34, 

41, 43, 46, 47)

9

>

 (cue/fast forward) button (35)

J

Nx

 (play/stop/enter) button 

K

.

 (review/fast backward) button 

(35)

L VOL (volume) +/– button (23, 34)
M

 (repeat) A-B/  (priority) button 

(34, 38, 46)

N ERASE button (43)
O Opning for a handstrap (A handstrap 

is not supplied.)

This section is extracted 
from instruction manual.

5 Remaining battery/Charging 

indicator
When dry batteries are used, the 
indicator shows the remaining 
battery power.
While charging the rechargeable 
batteries an animation appears.

6 Selected message number/Total 

number of messages in the folder

7 Priority marks

Appear(s) when a message is set with 
priority mark(s).

8 Bookmark indicator

Appears when a bookmark is set for 
a message.

9 Alarm indicator

Appears when the alarm is set for a 
message.

J

Displays the EFFECT setting in the 
menu.
BA1 :  The bass sound is reinforced.
BA2 :  The bass sound is further 
reinforced.

1Operation mode indicator

Displays the following, depending on 
the current operation mode

 : playback
 : stop

 : review/fast backward, 

cue/fast forward

 : going backward/forward 

continuously

2 Folder indicator
3 Elasped time/Remaining time 

indication/Recording date and time 
indication

4 Folder name/Message name/Artist 

name indication

K Recording mode indicator

Displays the recording mode set 
using the menu when the IC recorder 
is in the stop mode, and displays the 
current recording mode when the IC 
recorder is in the playback mode.
STHQ : Standard play stereo 
recording mode with high quality 
sound
ST : Standard play stereo recording 
mode
STLP : Long play stereo recording 
mode
SP : Standard play monaural 
recording mode
LP : Long play monaural recording 
mode
MP3 : MP3 mode (during playback 
only)

L Microphone sensitivity indicator

Displays the current microphone 
sensitivity.

 (high) : To record at a meeting or 

in a quiet/spacious place.

 (low) : To record for dictation or in 

a noisy place.
MAN (manual) : To record with 
microphone sensitivity set manually.

M Remaining recording time indication

N Operation mode indicator

Displays the following, depending 
on the current operation of the IC 
recorder.

 : recording
 : recording standby/recording 

pause

 : recording with the VOR 

function

 : recording pause with the 

VOR function

O Recording level meter

P Microphone sensitivity indicator

Displays the current microphone 
sensitivity when recording with AGC 
(Automatic Gain Control).

 (high) :  To record at a meeting or 

in a quiet/spacious place.

 (low) :  To record for dictation or in 

a noisy place.
Displays the recording level during 
manual recording.

Q Elapsed recording time indication
R Alarm indicator
S Recording mode indicator

Displays the recording mode (STHQ, 
ST, STLP, SP, and LP) set in the menu.

T LIM (limiter) indicator

Displays the LIMITER setting in the 
menu.
When “REC LEVEL” is set to “AUTO-
AGC,” “---” is displayed.

U Remaining recording time indication
V Remaining battery/Charging 

indicator

W LCF (Low Cut Filter) indicator

Displays the LCF setting in the menu.

1

Press and hold 

/MENU.

The menu mode will be displayed in 
the display window.

2

Press 

.

 or 

>

 to select “DETAIL 

MENU” and press 

Nx

.

3

Press 

.

 or 

>

 to select “DATE & 

TIME” and press 

Nx

.

.

>

Nx

When you selected “AUTO,”  the clock is 
automatically adjusted using the clock 
in the computer connected to the IC 
recorder and on which the supplied 
Digital Voice Editor software is started.
When you select “MANUAL,” proceed 
to the next steps.

x

.

/

>

Nx

/MENU

You need to set the clock to use the 
alarm function or record the date and 
time.
Clock setting display appears when you 

you insert batteries after the IC recorder 
has been without batteries for a certain 
period of time. In this case, proceed from 
step 4.

.

>

Nx

.

>

Nx

“EXECUTING….” appears and the clock 
is set.

x

If you do not press 

Nx

 within one minute 

of entering the clock setting data, the clock 
setting mode is cancelled and the window 
will return to the normal display.

P