Sony ICD-57 User manual

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: 0 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 Ω 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 × ⁄16 in.)
Mass (incl. battery) ICD-37: 56 g (1. 8 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 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
1 ). 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

– 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 1.5V 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.

– 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
1VOL (volume) control (14)
2FILE utton (10, 13, 18)
3MIC ( uilt-in microphone)
(10)
4NxPLAY/STOP (play/
stop•enter) utton (8, 14, 15)
5–./>+ (fast forward/
fast ackward•selection of
menu mode) utton (13, 15)
6STOP utton (11)
7HOLD switch (25)
8PLAY SPEED selector (19)
9MENU utton (8, 21, 34)
0Display window (33)
qa OPR (operation) indicator
(10, 14)
qs ERASE utton (16)
qd REC (record) START/STOP
utton (10)
qf Speaker
qg EAR (earphone) jack (15)
qh Hand strap (supplied to
ICD-57/67 only)
33
AdditionalInformation
Display window
51
2
3
4
6
7
8
9
1Total num er of messages in
a file (13)
Mode indication of the
menu(21, 26 - 28) (On, OFF,
etc.)
2File indication (10, 13)
3Current message num er (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 attery for the first time, or
when you insert attery after the unit has een without attery 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.

– 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 Boar
d
3lid, battery case
2boss
2boss
1
2claw
2three claws
2three claws
4case (front) section
3Remove the two solders
speaker lead (SP101).
1screw
5case (rear) section
3
#
speaker (SP101)

–5 –
MAIN BOARD
1two screws
(M1.7 ×4)
2bracket
(jack)
3Remove 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 condense
r
(MIC101)
Install two leads the electric condenser microphone
(MIC101) in the figure.

– 6 –
SECTION 4
TEST MODE
[Setting Method ofTest 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) –
TP701
Short :Test mode
Open : Normal mode
)(
[Releasing Method ofTest Mode]
Turn off the power. Then,open the solder bridge on TP701 (TEST)
on the MAIN board.
[Operation of Setting onTest 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.
1. Audio test
• A howling occurs with “5P DSP LOOP” displayed on the LCD,
if the [REC START/STOP] key is pressed.
• The mute turns on, if [ +] key is pressed.
• The mute turns off, if [-- ] key is pressed.
• The microphone sensitivity becomes high, if the [HOLD] switch
turned off.
• The microphone sensitivity becomes low, 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
• Odd segment of LCD light up as shown below, if the [ERASE]
key is pressed.
LCD display
4. Beep sound check
• A beep (2.4 kHz) is kept sounding, if the [MENU] key is pressed.
• 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.
>
.
Nx
D
Y
S
D
M
M
M
REC DATE
SP
LP
REMAIN

ICD-37/57/67
– 7 – – 8 –
SECTION 5
DIAGRAMS
5-1. BLOCK DIAGRAM
18 13 40
9
11
12
7
42
43
37
14
16
19
18
29
28
36
2
72 73 72 41 8 2
32
16
74
85
65
89
88
9
8
1 6
7
2
3
4
87
82
79
80
70
77
75
76
71 21
67
66
15
68
22
63
69
84
100
3 6
4
5
414354042432
1371920171011146
1 2 86 4 3 64
TI– L. P. F
MIC
H. P. F A/D
CONVERTER
AGC
IC107
MIC AMP
IC103
TRANSMIT
SHIFT
REGISTER
RESET
SWITCH
Q111
MIC SENSE
SWITCH
Q103
SEQUENCE
AND
CONTROL
ADPCM
IC101 (1/2)
MIC101
DT
BCLKR
MCLK
BCLKT
FSR
FST
DIGITAL SIGNAL
PROCESSOR
IC104 (1/2)
DIGITAL SIGNAL
PROCESSOR
IC104 (2/2)
ADPCM
IC101 (2/2)
SYSTEM CONTROLLER
IC701
SDI
SCLK
SLDA
MDISD0
SSN
SCK
IOPD0
IOPD1
DAV
RDY
RSTB
REAL TIME CLOCK
IC703
DSPSI
DSPSSN
DSPSCK
DSPFRM
DSPSTP
DSPDAV
DSPRDY
DSPRST
DSPSO
BEEP
LMUTE
DSPSI SDO
X701
32.768kHz
OSCIN
SOCOUT
32KOUT INTR
CE
SCLK
SO
SI
RTCINT
RTCCE
RTCCLK
RTCDI
RTCDO
32 – 6123 – 26
S0 – S29COM0 – COM3
LEDPB
LEDREC
ND701
LIQUID
CRYSTAL
DISPLAY
XTALA
LINE MUTING
Q105
D/A
CONVERTER
POWER AMP
IC102, Q108, 109
LED DRIVE
Q506 (1/2)
LED DRIVE
Q506 (2/2)
B+ SWITCH
Q106, 107
RECEIVE
SHIFT
REGISTER
DR RO–
OPR
L. P. F
D504
VOL
RV101
EAR
J101
+
SP101
(SPEAKER)
•SIGNAL PATH
: PLAY
: REC
18 – 21, 24 – 27
91 – 98
FMIO0 – FMIO7
I/O0 – I/O7
FLASH MEMORY
16BIT: ICD-37
32BIT: ICD-57
64BIT: ICD-67
IC702
R/B CE WP GND RE WE ALE CLE
XFMBSY
WAKEUP KEY1 KEY0 XHOLD SPDSW XTEST
XFMCE
XFMWP
XFMSE
XFMRE
XFMWE
XFMALE XFMCLE
MICSEL
X702
5MHz
XT1
X2
X1
DSPMCK Q0CLKIN
AMPPOW
PLLCRL
APOWER
CE
DIVIDER
IC106
GRN
(PLAY)
RED
(REC)
1.5V
(POWER AMP (IC102) B+)
3.3V
ADPCM (IC101), DSP (IC104),
DIVEDER (IC106), LED B+
3.3V
MIC AMP (IC103),
AGC (IC107) B+
3.3V
SYSTEM CONTROLLER (IC701), FLASH
MEMORY (IC702), REAL TIME CLOCK (IC703) B+
+3.3V
REGULATOR
IC503
+3.3V
REGULATOR
IC506
DC/DC
CONVERTER
IC502, Q502
DC/DC
CONVERTER
IC501
DC/DC CONVERTER
CONTROL
Q507
VOLTAGE
DETECT
IC504
RESET SIGNAL
GENERATOR
IC505
POWER
SWITCHING
Q508
BATT B+
DRY BATTERY
SIZE "AAA"
(IEC DESIGNATION R03)
1PC. 1.5V
BATT B+
XSPOWER
XRESET
BATT
PLAY SPEED>HOLD
MENU
FILE
ERASE
TP701
(TEST)
S712
FAST
NORMAL
SLOW
S711
OFF
HOLD
WAKE UP CONTROL
SWITCH
Q701 – 703
S701 – 705 S707 – 709
S707
STOP
(SELECT)
– .
> +
S701
REC
START/STOP
PLAY/STOP
Nx
(EXECUTE)
S702
S703
S704
S705
S708
S709
05

ICD-37/57/67
–9 ––10 –
5-2. PRINTED WIRING BOARD
• Semiconductor
Location
Ref. No. Location
D501 E-2
D502 D-2
D504 C-4
D701 E-3
IC101 B-4
IC102 F-3
IC103 C-9
IC104 B-3
IC106 C-3
IC107 B-2
IC501 F-2
IC502 E-2
IC503 E-2
IC504 D-3
IC505 F-3
IC506 D-2
IC701 D-8
IC702 F-8
IC703 E-4
Q103 B-9
Q105 F-2
Q106 F-2
Q107 F-9
Q108 F-3
Q109 G-2
Q111 B-8
Q502 D-2
Q506 D-4
Q507 D-3
Q508 F-9
Q701 F-2
Q702 F-2
Q703 F-2
Note on Printed Wiring Board:
•X: parts extracted from the component side.
•Y: parts extracted from the conductor side.
•f: internal component.
•b: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
Caution:
Pattern face side: Partsonthe pattern facesideseenfrom
(Side B) the pattern face are indicated.
Parts face side: Parts on the parts face side seen from
(Side A) the parts face are indicated.
A
B
C
D
E
F
12345678910
G
•Main board is four layer printed board.
However, the patterns of layers 2 and 3 have not been in-
cluded in this diagrams.

ICD-37/57/67
– 11 – – 12 – – 13 –
5-3. SCHEMATIC DIAGRAM • See page 14 for Waveforms. •See page 15 for IC Block Diagrams.
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ωand 1/4W or less unless otherwise
specified.
• % : indicates tolerance.
•f: internal component.
•C: panel designation.
•U: B+ Line.
• Powervoltage is dc1.5 V andfedwith regulateddcpower
supply from battery terminal.
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark : PLAY
( ) : REC
∗: Impossible to measure
• Voltages aretakenwithaVOM(Input impedance10MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F: PLAY
L: REC

–14 ––15 ––16 –
•Waveforms
1IC101 7(FSR), qf (FST)
IC104 rd (SLDA)
1 V/DIV, 50 µs/DIV
•IC Block Diagrams
IC101 MC145481SDR2
+
–
813
1
2
20
0.886 V
REF
H. P. F.
SEQUENCE
AND
CONTROL
SHARED
DAC
DAC ADC
RECEIVE SHIFT
REGISTER
TRANSMIT SHIFT
REGISTER
VAG REF
RO–
4
PO–
3
PI
6
VDD
5
PO+
DR
9
BCLKR
10
PDI
7
FSR
DT
12 BCLKT
11 MCLK
14 FST
15 VSS
16 MU/A
VAG
19 TI+
18 TI–
17 TG
1
VDD
VSS
CUT OFF
FREQUENCY: 200 Hz
L. P. F.
CUT OFF
FREQUENCY: 3.4 kHz
L. P. F.
CUT OFF
FREQUENCY: 3.4 kHz
–
+
–1
IC102 NJM2076M (TE2)
INVA IN
NON INVB IN
BASE B
BASE A
A OUT
VSS
B OUT
2
VDD 3
1
4
7
6
5
8
POWER
AMP
POWER
AMP
IC106 XC25BS5001MR
3
4
1
2
6
Q1
VDD
CLKIN
CE
Q0
5VSS
1
2
1
4
11 BIT PLL
(×N)
IC107 AN6123MS-TXL
GM
5
DET
3
IN
4
GND
2
DET
1
VCC
DET
IC501 XC6372C331PR
IC502 XC6372D351PR
NC
VOUT
CE
VSS
LX
2
1
3
4
5
VLX
LIMITER
PWM/PFM
CONTROL
OSC 100kHz
BUFFER
PHASE
COMPARATOR
REFERENCE
VOLTAGE
CHIP
ENABLE
SLOW
START
+
–
VDD
IC503, 506 XC62GR3312MR
+
–
3OUTPUT
CONTROL
REFERENCE
VOLTAGE
4
1
2 5
CURRENT
LIMIT
VSS
VIN
CE
NC
VOUT
IC703 RS5C348A-E2
VDD
VDD
OSCIN
OSCOUT
CE
/INTR
32KOUT
SCLK
SO
SI
VSS
32 kHz
OUTPUT
CONTROL COMPARATOR
W
COMPARATOR
D
ADDRESS
REGISTER
I/O
CONTROL
ADDRESS
DECODER
SHIFT
REGISTER
INTERRUPT
CONTROL
OSC
DETECT
VOLTAGE
DETECT
ALARM W REGISTER
(WEEK, MIN, HOUR)
ALARM D REGISTER
(MIN, HOUR)
DIV OSC
DIVIDER
CORRECTION
9
10
8
7
6
2
3
4
5
1
TIMER COUNTER
SEC, MIN, HOUR, WEEK,
DAY, MONTH, YEAR
3.4 Vp-p
150 µs
2IC101 9(BCLKR), qa (MCLK),
qs (BCLKT), IC104 rs (SCLK)
1 V/DIV, 200 ns/DIV
3IC104 es (XTALA), IC106 6(Q0)
1 V/DIV, 100 ns/DIV
4IC106 3(CLKIN), IC701 qg (DSPMCK)
1 V/DIV, 20 µs/DIV
5IC701 ul (X2)
2 V/DIV, 100 ns/DIV
6IC701 is (XT1), IC703 1(32KOUT)
1 V/DIV, 10 µs/DIV
7IC701 ij (RTCINT),IC703 6(INTR)
2 V/DIV, 200 ms/DIV
8IC703 8(OSCOUT)
200 mV/DIV, 10 µs/DIV
9IC501 4(LX)
1 V/DIV, 5 µs/DIV
0IC502 4(LX)
2 V/DIV, 5 µs/DIV
qa Q502 (Base)
200 mV/DIV, 5 µs/DIV
qs Q502 (Collector)
1 V/DIV, 5 µs/DIV
3.4 Vp-p
565 ns
4.6 Vp-p
282 ns
73.5 µs
3.4 Vp-p
3.6 Vp-p
200 ns
2.5Vp-p
30.6 µs
4.3 Vp-p
500 ms
1.1 Vp-p
30.6 µs
4.3 Vp-p
9.9 µs
3.6 Vp-p
11.2 µs
0.9 Vp-p
11.1 µs
4.6 Vp-p
3.6 µs