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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 ............................... 21CAUTION 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 ΛC 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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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
1VOL (volume) control (14)
2FILE button (10, 13, 18)
3MIC (built-in microphone)
(10)
4NxPLAY/STOP (play/
stop-enter) button (8, 14, 15)
5-./>+ (fast forward/
fast backward-selection of
menu mode) button (13, 15)
6STOP button (11)
7HOLD switch (25)
8PLAY SPEED selector (19)9MENU button (8, 21, 34)
0Display window (33)
qaOPR (operation) indicator
(10, 14)
qsERASE button (16)
qdREC (record) START/STOP
button (10)
qfSpeaker
qgEAR (earphone) jack (15)
qhHand strap (supplied to
ICD-57/67 only)
33
Additional Information
Display window
5 1
2
3
46
7
8
9
1Total number of messages in
a file (13)
Mode indication of the
menu(21, 26 - 28) (On, OFF,
etc.)
2File indication (10, 13)
3Current message number (10,
13)
4Remaining 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.)5Alarm indicator (23)
6Battery exhausted indicator
(7)
7Repeat play indicator (15)
8REMAIN indication (10)
9REC 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
1Press MENU to enter
the menu mode.*2Press -. once to display
SET DATE.
3Press NxPLAY/STOP.
The year digits will flash.
2Press NxPLAY/STOP.
The month
digits will flash.
3Set the month and day in
sequence, then press
NxPLAY/STOP.
The hour
digits will
flash.
1Press -. 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
2Press NxPLAY/STOP.
The minute digits will flash.3Set the minute.
4Press NxPLAY/STOP at the
time signal.
The display will return to
SET DATE.
4
1Press -. or >+ to select the digits of the hour.
