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SERVICE MANUAL
IC RECORDER
US Model
Canadian Model
AEP Model
E Model
ICD-37/57/67
Tourist Model
ICD-57/67
SPECIFICATIONS
ICD-37/57/67
Photo: ICD-37
Recording media
Built-in flash memory, Monaural recording
Recording time
ICD-37: 45 minutes
ICD-57: 90 minutes
ICD-67: 180 minutes
Frequency response
280 Hz - 2 800 Hz
Speaker
approx. 3.6 cm (1 7/16 in.) dia.
Power output
80 mW
Output
Earphone jack (mini jack) for 8 - 300
earphone
Playback speed control
FAST: +50%
SLOW: ­25%
Power requirements
One LR03 (size AAA) alkaline battery: 1.5 V DC
Dimensions (w/h/d) (not incl. projecting parts and controls)
58.0
× 83.5 × 14.2 mm (2 3/8 × 3 3/8 × 9/16 in.)
Mass (incl. battery)
ICD-37: 56 g (1.98 oz)
ICD-57/67: 57 g (2.01 oz)
Supplied accessories
LR03 (size AAA) alkaline battery
× 1
(tourist model and ICD-57/67 for U.S.A. only)
Handstrap (attached to the unit)
× 1
(ICD-57/67 only)
Design and specifications are subject to change without notice.
Features
· 45 minutes (ICD-37)/90 minutes (ICD-57)/180 minutes (ICD-67)
recording time
This unit is useful for recording messages or appointments.
· Organizing message files
You can choose among 3 different files to record and store your
messages.
You can easily move messages from one file to another (see page 18).
Up to 99 messages can be recorded in each file.
· Alarm function
You can start playing back a desired message with an alarm on a desired
date and time (see page 21). You can use this function to remind you of
the time of the meeting, etc.
· Playback speed control
You can play back messages rapidly (+50%) or slowly (­25%) (see page
19). This is useful when playing back a long recording. The sound pitch
will be automatically adjusted when you change the playback speed.
· Adding a recording to previously recorded message
You can add a recording to the message being played back to count as
one message (see page 20).
Ver 1.0 2000. 03


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­ 2 ­
TABLE OF CONTENTS
1.
SERVICING NOTES ............................................... 2
2.
GENERAL ................................................................... 3
3.
DISASSEMBLY ......................................................... 4
4.
TEST MODE .............................................................. 6
5.
DIAGRAMS
5-1. Block Diagram ................................................................
7
5-2. Printed Wiring Board ......................................................
9
5-3. Schematic Diagram ......................................................... 11
5-4. IC Pin Function Description ........................................... 17
6.
EXPLODED VIEW ................................................... 20
7.
ELECTRICAL PARTS LIST ............................... 21
CAUTION ON REPLACING FLASH MEMORY
The BAD-BLOCK check* must be executed, when the flash
memory (IC702) in this set was replaced.
The set will not operation normally, unless this check is finished.
* The BAD-BLOCK check detects an area (bad-block) in the flash
memory where data validity cannot be guaranteed, and saves this
information in the TOC-AREA so that a bad-block is not used.
BAD-BLOCK check Procedure:
1. Apply 1.5 V from regulated power supply to the battery termi-
nals.
2. Once the power is supplied, the check starts and then proceeds
for approx. 25 (ICD-37)/45 (ICD-57)/87 (ICD-67) seconds.
(Be sure to keep applying the power and pin yj or TP13 (green)/
Pin yh or TP14 (red) signal "H" during the check)
* Green/red LED of [OPR] indicator don't light up, therefore
it cannot be seen visually. Check the signal of pin yh , yj or
TP13, 14.
3. When the check completes, the result is shown as follows.
OK: Pin yh or TP14 signal "L" (Pin yj or TP13 Signal "H")
NG: Pin yj or TP13 signal "H" (Pin yh or TP14 signal "L")
4. In case of OK, press the [STOP] button.
Note:
· In case of NG, check system controller IC (IC701), flash memory IC
(IC702) and the peripheral circuit. (Particularly, check carefully the sol-
dering of the flash memory)
· After finishing the BAD-BLOCK check, assemble the set, load the dry
battery, and confirm if the set operates normally.
SECTION 1
SERVICING NOTES
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 the soldering iron around 270 °C dur-
ing 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.


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­ 3 ­
SECTION 2
GENERAL
This section is extracted from
instruction manual.
32
Index to Parts and Controls
Refer to the pages indicated in parentheses for details.
Main unit
9
q;
qa
qs
qd
qf
qg
qh
1
2
3
4
5
6
7
8
1
VOL (volume) control (14)
2
FILE button (10, 13, 18)
3
MIC (built-in microphone)
(10)
4
Nx
PLAY/STOP (play/
stop·enter) button (8, 14, 15)
5
­./>+ (fast forward/
fast backward·selection of
menu mode) button (13, 15)
6
STOP button (11)
7
HOLD switch (25)
8
PLAY SPEED selector (19)
9
MENU button (8, 21, 34)
0
Display window (33)
qa
OPR (operation) indicator
(10, 14)
qs
ERASE button (16)
qd
REC (record) START/STOP
button (10)
qf
Speaker
qg
EAR (earphone) jack (15)
qh
Hand strap (supplied to
ICD-57/67 only)
33
Additional
Informatio
n
Display window
5
1
2
3
4
6
7
8
9
1
Total number of messages in
a file (13)
Mode indication of the
menu(21, 26 - 28) (On, OFF,
etc.)
2
File indication (10, 13)
3
Current message number (10,
13)
4
Remaining recording time
indication (10)
Recording date indication
(14)
Current time/day indication
(8)
Menu indication (8, 21, 26 -
28, 34) (ALARM, etc.)
Messages (ERASE, SCAN,
etc.)
5
Alarm indicator (23)
6
Battery exhausted indicator
(7)
7
Repeat play indicator (15)
8
REMAIN indication (10)
9
REC DATE indication (14)
8
Clock setting display appears when you insert battery for the first time, or
when you insert battery after the unit has been without battery for a
certain period of time. In this case, proceed from Step 2.
Display the clock setting display.
Set the date.
Step 2: Setting the Clock
1
Press MENU to enter
the menu mode.*
2
Press ­. once to display
"SET DATE".
3
Press NxPLAY/STOP.
The year digits will flash.
2
Press NxPLAY/STOP.
The month
digits will flash.
3
Set the month and day in
sequence, then press
Nx
PLAY/STOP.
The hour
digits will
flash.
1
Press ­. or >+ to select the digits of the year.
1
2
* The "ALARM" display may
appear instead of the "BEEP"
display (see page 34).
9
Getting
Started
Set the time.
Exit from the menu mode.
Press MENU.
3
2
Press NxPLAY/STOP.
The minute digits will flash.
3
Set the minute.
4
Press NxPLAY/STOP at the
time signal.
The display will return to
"SET DATE".
4
1
Press ­. or >+ to select the digits of the hour.


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­ 4 ­
LID, BATTERY CASE
CASE (FRONT) SECTION, CASE (REAR) SECTION
Note: Follow the disassembly procedure in the numerical order given.
SECTION 3
DISASSEMBLY
· This set can be disassembled in the order shown below.
Set
Lid, Battery Case
Case (Front) Section
Case (Rear) Section
Main Board
3
lid, battery case
2
boss
2
boss
1
2
claw
2
three claws
2
three claws
4
case (front) section
3
Remove the two solders
speaker lead (SP101).
1
screw
5
case (rear) section
3
#
speaker (SP101)


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­ 5 ­
MAIN BOARD
1
two screws
(M1.7
× 4)
2
bracket
(jack)
3
Remove the MAIN board to
direction of the arrow.
INSTALLATION "MAIN BOARD", "MICROPHONE, ELECTRIC CONDENSER" (MIC101)
knob (MODE)
knob (HOLD)
S711
S712
microphone, electric condenser
(MIC101)
Note: On installation MAIN board adjust the S711, S712
and knob (HOLD, MODE).
two leads
microphone,
electric condenser
(MIC101)
Install two leads the electric condenser microphone
(MIC101) in the figure.