Sony ICD-80 Service Manual

ICD-80

SERVICE MANUAL

Ver 1.0 1998. 07

SPECIFICATIONS

US Model

MICROFILM

IC RECORDER

SECTION 1

SERVICING NOTES

TABLE OF CONTENTS

1. SERVICING NOTES............................................... 2

2. GENERAL ................................................................... 3

3. DISASSEMBLY ......................................................... 4

4. DIAGRAMS

4-1. Block Diagram ................................................................ 5

4-2. Schematic Diagram ......................................................... 8

4-3. Printed Wiring Board ...................................................... 11

4-4. IC Pin Function Description ........................................... 16

5. EXPLODED VIEW................................................... 19

6. ELECTRICAL PARTS LIST ............................... 20

CAUTION ON REPLACING FLASH MEMORY

The BAD-BLOCK check* must be executed, when the flash
memory in this set was replaced.
The set will not operate normally, unless this check is finished.

* T he 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 3.0 V from re gulated power supply to the battery termi­nals.
(The battery lid open/close detection switch S701 may be kept
off)

2. Red LED and green LED light up.

3. As “Push St & Er” is displayed on the LCD, press the STOP
(S703) button and the ERASE (S702) button simultaneously.
(BAD-BLOCK check will start)

4. “Bad Check” is displayed on the LCD. (Check will last for
about 90 sec, and keep applying regulated power supply dur­ing checking)

5. Backlight turns on (B AD-BLOCK check finished successfully)
(*)
Red and green LEDs turn off. “Good OK!” is displayed on
the LCD.
(*): In case of NG, “Bad Memory” is displayed on the LCD.

6. Press the RESET (S501) button.

Note:

• In case of NG, check the System Control IC, Memory IC, and

their peripheral circuits. (Particularly, check carefully the sol­dering of the flash memory)

• After finishing the BAD-BLOCK check, assemble the set, load

the battery, and confirm if the set operates normally.

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.

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.

– 2 –

SECTION 2

GENERAL

This section is extracted from
instruction manual.

– 3 –

SECTION 3

d

DISASSEMBLY

Note: Follow the disassembly procedure in the numerical order given.

BATTERY CASE LID, MAIN BOARD

1

battery case lid

A

2

tapping screw
(B1.7)

Pull the battery case lid towar
direction A, remove it.

7

case block assy

4

MAIN board

6

switch unit

5

two screws
(M1.7

×

2.5)

– 4 –

3

upper lid block assy

4-1. BLOCK DIAGRAM

MIC101

MIC

J101

MIC

PLUG IN POWER

MIC SENSE

SWITCH

Q103

SECTION 4

DIAGRAMS

ADPCM

IC101 (1/2)

AIN1 GSX1

12 13

AGC CIRCUIT

D101, D102,
IC103, Q104

ICD-80

• SIGNAL PATH

SYSTEM CONTROLLER

IC701

AIN2

14

L.P.F.

GSX2

15

BCLKA28BCLKB

27

A/D

CONVETER

XSYNC25RSYNC
26

DECIMETER

TIMING

GENERATOR

RESET
1

PDN
21

B.P.F.

MCK

24

COMPRESSOR

DECODER

ADPCM

IS

5

PIA IS69POA IR

68

12PO MUTE
51PO PAMP

ADPCM

IC101 (2/2)

IR

4

ADPCM

DECODER

EXPANDER

L.P.F.

INTER-

POLATOR

D/A

CONVETER

L.P.F.

VFRO

: PLAY

SP101

RV101

VOL

16

TONE

CONTROL

LINE

MUTING

Q105

+

POWER

AMP

IC105

STANDBY

SWITCH

Q106

(SPEAKER)

J102

@

(EARPHONE)

: REC

DATA0 (COM0)
DATA1 (COM1)
DATA2 (COM2)
DATA3 (COM3)

DATA4 (REQUEST)

DATA5 (SCLK)

DATA6 (C/D)

DATA7 (TEST)

STATUS4 (SDATAO)

STATUS5 (SDATAI)

STATUS6 (OPT)

STATUS7 (ACK)

GND (WAV LINK)

CN703

DIGITAL I/O

1
2
3
4
5
6
7

8

9

10

11

12

13

DATA0
DATA1
DATA2
DATA3

LEVEL SHIFT

Q704 (1/2)

LEVEL SHIFT

Q704 (2/2)

Q705

CLOCK SWITCH

IC705

6 5

1 2

– 5 –

PO BEEP

PO PMUT

PI POTA
PI POTB

KEY A/D

PI WAKE

PI ERS

53

1

FLASH MEMORY

IC702

ALE

I/O0 – I/O7

18 – 21, 24 – 27

84 – 91

PO0 – PO7

PO LIGH

POL REC

POL PLY

30

27

26

80
81

63

KEY

78

8

WAKE-UP

Q701 – 703

S702

ERASE

CLE

2

3

93

94

POR ALE

POR CLE

BACK LIGHT

LED DRIVE

Q503

LED DRIVE

Q551

WEREWP

42

95496

POR WE

SE

40

98

SE

POR RE

S703
STOP

S705

REC

5

43

99

6

WP

CE

R/B

41

7

POR CE

PIR R/B

SWITCH UNIT

= – + +

(PUSH: PLAY/STOP)

(BACK LIGHT)

(PLAY: GREEN)

(REC: RED)

ROTARY

ENCODER

D503

S704

9 HOLD

OPR

FILE
PRIORITY
MENU

– 6 –

X702

6.912MHz

X703

3 POA PDN
4

POA RES

PI VOR

10

5 PO MIC

PO LPC

58

PO SPC

57

OSCO

24

OSCI

23

XO

21

XI

20

POS LE

46
44

POS DAT

45

POS CLK
PO XSDW

65

XSYNC

76

POA CLK

67

PO WLOK

33

PI COM0

39
40 PI COM1

PI COM2

41

PI COM3

42
77

PI REQ
PI C/D

50

PI TEST

48

POD DAT

72

PO OPT

32

PO ACK

31

PI WLNK

38

POD SCK

70

POD STB

71

PO LCDV

60

PO LCDR

52

VOR

DETECTOR

IC104

1

VDD

VDD2

CLOCK GENERATOR

IC704

OUT

4

2 1

D701

XT

XT

INH

1

4

CLOCK SWITCH

IC703

VREF

VLCD

REFERENCE

2

6

X701

32.768kHz

DATA0
DATA1
DATA2
DATA3

VOLTAGE

SWITCH

Q706

10.368MHz

1296 DIVIDER

DATA

LATCH

IC107

IC102

3
7

BP701

IC106

OUT

13

CLK

9

DATA

DATA

10

11

SCK

LCD MODULE

IN

CE

STB

GAIN DOWN MUTING

PI HOLD

9

OFF

ON

S701

BATTERY LID

OPEN/CLOSE DETECT

Q107

PO BOP79PI OPEN

56

PO BACK

14

PI DET3

11

PO BOT

13

PO REGU

15

S501

RESET

MIC CIRCUIT B+

RST

82

RESET SIGNAL

GENERATOR

IC502

REGULATOR

Q101, 102

+3.3V

BACK UP B+

VOLTAGE

DETECTOR

– 7 –

BACK UP B+

REGULATOR

IC503

+3.3V
IC501

B+

SWITCH

Q501

+2.1V

LED B+

D501

BT501

BACK UP

CONTROL

SWITCH

Q552

+2.1V

REGULATOR

IC551

DC/DC

CONVERTER

IC504

POWER AMP

(IC105) B+

DC/DC CONVERTER

CONTROL

IC505, Q502

DRY BATTERY

SIZE “AAA”

(IEC DESIGNATION R03)

2PCS. 3V