Sony ICD-37, ICD-57, ICD-67 Service manual
ICD-37/57/67
SERVICE MANUAL
Ver 1.0 2000. 03
Photo: ICD-37
SPECIFICATIONS
Recording media Built-in flash memory, Monaural recording
Recording time ICD-37: 45 minutes
Frequency response 280 Hz - 2 800 Hz
Speaker approx. 3.6 cm (1
Power output 80 mW
Output Earphone jack (mini jack) for 8 - 300 Ω earphone
Playback speed control FAST: +50%
Power requirements One LR03 (size AAA) alkaline battery: 1.5 V DC
Dimensions (w/h/d) (not incl. projecting parts and controls)
Mass (incl. battery) ICD-37: 56 g (1.98 oz)
Supplied accessories LR03 (size AAA) alkaline battery × 1
Design and specifications are subject to change without notice.
ICD-57: 90 minutes
ICD-67: 180 minutes
7
⁄16 in.) dia.
SLOW: –25%
3
3
58.0 × 83.5 × 14.2 mm (2
ICD-57/67: 57 g (2.01 oz)
(tourist model and ICD-57/67 for U.S.A. only)
Handstrap (attached to the unit) × 1
(ICD-57/67 only)
9
⁄
8
× 3
⁄
8
×
⁄16 in.)
US Model
Canadian Model
AEP Model
E Model
ICD-37/57/67
Tourist Model
ICD-57/67
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).
IC RECORDER
SECTION 1
SERVICING NOTES
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 re gulated power supply to the battery terminals.
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
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
Note:
• In case of NG, check system controller IC (IC701), flash memory IC
(IC702) and the peripheral circuit. (Particularly , check carefully the soldering of the flash memory)
• After finishing the BAD-BLOCK check, assemble the set, load the dry
battery, and confirm if the set operates normally.
[OPR] indicator don't light up, therefore
[STOP] button.
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.
Flexible Circuit Board Repairing
• Keep the temperature of the 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.
– 2 –
Index to Parts and Controls
Refer to the pages indicated in parentheses for details.
Main unit
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 NxPLAY/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)
9
q;
qa
qs
qd
qf
qg
qh
SECTION 2
GENERAL
Display window
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.)
2
3
4
This section is extracted from
instruction manual.
51
6
7
8
9
5 Alarm indicator (23)
6 Battery exhausted indicator
(7)
7 Repeat play indicator (15)
8 REMAIN indication (10)
9 REC DATE indication (14)
Additional Information
32
Step 2: Setting the Clock
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.
1
1 Press MENU to enter
the menu mode.*
* The “ALARM” display may
appear instead of the “BEEP”
display (see page 34).
Set the date.
2
1 Press –. or >+ to select the digits of the year.
2 Press –. once to display
“SET DATE”.
3 Press NxPLAY/STOP.
The year digits will flash.
Set the time.
3
1 Press –. or >+ to select the digits of the hour.
3 Set the minute.
2 Press NxPLAY/STOP.
The minute digits will flash.
4 Press NxPLAY/STOP at the
time signal.
The display will return to
“SET DATE”.
Exit from the menu mode.
4
Press MENU.
33
Getting Started
2 Press NxPLAY/STOP.
The month
digits will flash.
8
3 Set the month and day in
sequence, then press
NxPLAY/STOP.
The hour
digits will
flash.
9
– 3 –
• This set can be disassembled in the order shown below.
d
SECTION 3
DISASSEMBLY
Set
Note: Follow the disassembly procedure in the numerical order given.
Lid, Battery Case Case (Front) Section
Case (Rear) Section Main Boar
LID, BATTERY CASE
3 lid, battery case
2 boss
2 boss
1
CASE (FRONT) SECTION, CASE (REAR) SECTION
2 claw
speaker (SP101)
#
3
3 Remove the two solders
speaker lead (SP101).
1 screw
5 case (rear) section
2 three claws
2 three claws
4 case (front) section
– 4 –
MAIN BOARD
r
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)
Note: On installation MAIN board adjust the S711, S712
and knob (HOLD, MODE).
microphone, electric condenser
(MIC101)
S712
S711
knob (HOLD)
Install two leads the electric condenser microphone
(MIC101) in the figure.
two leads
microphone,
electric condense
(MIC101)
knob (MODE)
– 5 –
SECTION 4
TEST MODE
[Setting Method of Test mode]
Short TP701 (TEST) on the MAIN board with a solder bridge
(connect pin yf of IC701 to the ground). Then, turn on the power.
– MAIN BOARD (Side A) –
1. Audio test
• A howling occurs with “5P DSP LOOP” displayed on the LCD,
if the [REC START/STOP] key is pressed.
>
Nx
[ +] key is pressed.
.
[-- ] key is pressed.
• The mute turns on, if
• The mute turns off, if
• The microphone sensitivity becomes high, if the [HOLD] switch
turned off.
• The microphone sensitivity becomes lo w, if the [HOLD] switch
turned on.
2. Sleep/Wake up test
• Pressing the [ ] key causes the set to enter sleep state.
• Pressing another key causes the set to release sleep state.
3. LCD check
• LCD light up all, if the [STOP] key is pressed.
• Even segment of LCD light up as shown below, if the [FILE]
key is pressed.
LCD display
REC DATE
M
D
M
Y
S
M
D
Short : Test mode
Open : Normal mode
[Releasing Method of Test Mode]
Turn of f the power . Then, open the solder bridge on TP701 (TEST)
on the MAIN board.
TP701
)(
• Odd segment of LCD light up as shown below , if the [ERASE]
key is pressed.
LCD display
SP
LP
REMAIN
4. Beep sound check
• A beep (2.4 kHz) is kept sounding, if the
• A beep stop sounding, if another key is pressed.
5. Power supply check
• The battery is on the O.K. level when the [OPR] LED lights in
green only, or it is off.
• The battery is on the mark lighting level when the [OPR] LED
lights in green and blinks in red repeatedly.
• The battery is on the inactive level when the [OPR] LED blinks
in red only.
[MENU] key is pressed.
[Operation of Setting on Test Mode]
When the test mode is set, the LCD displays “TEST” and [OPR]
LED lights in green.
Note: The [OPR] LED turn off, if a key operated.
– 6 –
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