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2

• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be

damaged by heat.

z

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 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.

...................................................................

3

2-1.

Case (Front) Assy ............................................................

4

2-2.

SWITCH Board, MAIN Board .......................................

5

2-3.

AUDIO Board ..................................................................

5

.......................................................

6

4-1.

Block Diagram ................................................................ 11

4-2.

Printed Wiring Board  – AUDIO Section – ..................... 12

4-3.

Schematic Diagram  – AUDIO Section – ........................ 13

4-4.

Printed Wiring Board  – MAIN Section – ....................... 14

4-5.

Printed Wiring Board  – SWITCH Section – .................. 15

4-6.

Schematic Diagram  – MAIN Section – .......................... 16

5-1.

MAIN Board Section ....................................................... 20

5-2.

Case (Rear) Section ......................................................... 21

.................................. 22

3

This section is extracted
from instruction manual.

Index to Parts and Controls

MIC (built-in microphone)

Display window

MENU

DISPLAY

zX REC (record) /PAUSE

Nx PLAY/STOP (ENTER)

– . (review/fast backward) /

> + (cue/fast forward)  (SELECT)

Speaker

Hook for handstrap
(not supplied)

MIC SENS
(microphone
sensitivity)

Battery
compartment

Folder indication

Alarm indicator

Repeat play indicator

Selected message

number

REC DATE (recorded

date) indication

REMAIN indicator

MIC jack  (PLUG  IN POWER)

EAR (earphone)  jack

OPR (operation)  indicator

ERASE

FOLDER

VOL (volume)  +/–

DIVIDE

HOLD

x STOP

Remaining memory
indicator

Remaining battery
indicator

Recording mode
indication

REC (recording)
indicator

Number of messages
in a  folder/Menu
indication/Counter
/Remaining time
indication /
Recording date
indication /Current
time indication /
Messages

4

• This set can be disassembled in the order shown below.

Follow the disassembly procedure in the numerical order given.

2-1. CASE (FRONT) ASSY

(Page 4)

2-2. SWITCH BOARD,

MAIN BOARD
(Page 5)

SET

2-3. AUDIO BOARD

(Page 5)

2

 screw

3

 screw

4

 claw

5

 two claws

7

 case (front) assy 

6

 two claws

1

 battery case lid

5

1

 CN705

2

 SWITCH board

4

 MAIN board 

S701

3

 CN701

5

 claw

6

9

8

7

 claw

 S702

3

 screw

2

 cushion (battery case lid)

1

 battery case lid

0

 AUDIO board 

4

 speaker (2cm)