Sony TCM-40DV, Service Manual

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– 18 –

– 19 –

– 20 –

• IC Block Diagrams

IC101

LA4168ML-TE-L

+

–

+

–

+

–

+ 
–

21

22

23

24

25

26

27

28

29

30

2

3

5

4

6

7

8

9

10

1

11

12

13

14

15

16

17

18

19

20

300k

EQ

MIC 

2.2k

30k

2k

PAUSE    

POWER

MIC
VCC

Vref

R/P

R, F

GVN

VOX

SPEED

ALC

VOX

20k

REC

1

2

PRE GND

EQ IN

MIC IN

Vref OUT

MIC VCC

R, F OUT

LED DRIV

E

R/P SW

PAUSE

P/R MUTE

GVN CONT

GVN Vref

 Vs

GVN GND

GVN OUT

PRE NF

PRE OUT

REC IN

REC OUT

ALC CONT

VOX CONT

VOX DELAY

GNV SPEED UP

AUT STOP CONT

AUT STOP IN

PWR IN

PWR OUT1

PWR GND

PWR OUT2

Vcc

IC501

MM1251BFBE

BOOSTER

CIRCUIT

NC

CT

GND

OUT

NC

VCC

VS

HYS

2

1

3

4

6

7

8

5

+
–

+

–

IC601

LB1877V-TLM

COMPARATOR

S/S

VREF

IN+

WB

VB

UB

PRE DRIVER

SOFT SWITCH

WAVEFORM DETECT

COMMUNICATION

STARTING LOGIC

OSC

CIRCUIT

STARTING

DETECT

CURRENT
CONTROL

REFERENCE

VOLTAGE

POWER
SUPPLY

BIAS

SPEED CONTROL

REFERENCE VOLTAGE

OUTPUT

BIAS

DIRECTION

CONTROL

SPEED

CONTROL

13

VSP

14

OUT

15

FC

16

LB

17

VCC

18

DR

19

UOUT

20

12

11

4

WOUT

2

PGND

3

VOUT

1

5

6

OSC

7

COM

8

GND

9

R1 10

+

–

(2)

MECHANISM  DECK  SECTION-1
(MT-40-118)

SECTION  7

EXPLODED  VIEWS

• Items marked “*” are not stocked since they

are seldom required for routine service. Some
delay should be anticipated when ordering
these items.

• The mechanical parts with no reference num-

ber in the exploded views are not supplied.

• Accessories and packing materials are given

in the last of the electrical parts list.

NOTE:

• -XX and -X mean standardized parts, so they

may have some difference from the original
one.

• Color Indication of Appearance Parts

Example:
KNOB, BALANCE (WHITE) . . . (RED)

↑

↑

Parts Color Cabinet's Color

Ref. No.

Part No.

Description

Remark

Ref. No.

Part No.

Description

Remark

1

3-318-382-31 SCREW (1.7), TAPPING

2

3-345-648-51 SCREW (M1.4), TOOTHED LOCK

*

3

A-3021-227-A MAIN BOARD, COMPLETE

4

3-008-612-01 TERMINAL, PLUS

5

3-924-750-01 TERMINAL, MINUS

6

3-924-744-01 SPRING (CLAW DETECTION), TENSION

7

3-018-311-01 CLAW, ERASING PREVENTION

8

3-018-310-11 BUTTON (PAUSE)

9

4-969-980-21 SCREW (IB LOCK)

10

3-578-101-41 PLATE, ORNAMENTAL

11

3-018-307-62 CABINET (FRONT)

12

A-3021-225-A LED BOARD, COMPLETE

13

3-936-424-01 SPRING, CASSETTE

14

4-017-441-01 CUSHION (B)

*

15

3-924-757-01 BRACKET (SPEAKER)

16

3-924-761-01 STRAP

17

3-018-309-11 LID, BATTERY CASE

18

3-018-308-51 CABINET (REAR)

19

3-018-312-01 FOOT (A)

20

3-334-565-11 SCREW (B1.7X10), TAPPING

21

3-023-856-01 FOOT (B)

22

3-907-531-01 SCREW

23

3-831-441-99 SPACER, KNOB

24

X-3377-425-1 LID SUB ASSY, CASSETTE (including MIC101)

25

3-026-183-01 CUSHION (BATTEY CASE LID)

26

3-318-382-04 SCREW (1.7), TAPPING

27

1-672-147-11 CONNECTION FLEXIBLE BOARD

SP901

1-505-838-11 SPEAKER (3.6cm)

Ref. No.

Part No.

Description

Remark

Ref. No.

Part No.

Description

Remark

51

X-3370-386-1 PINCH ROLLER ASSY

52

3-925-146-01 BUTTON (FF) (

)

)

53

3-925-147-01 BUTTON (REW) (

0

)

54

3-925-148-01 BUTTON (PLAY) (

(

)

55

3-925-145-11 BUTTON (REC) (

r

)

56

3-936-409-01 BUTTON (STOP) (

p

)

57

1-548-582-11 COUNTER, TAPE (SMALL TYPE)

58

3-924-625-01 LEVER (HEAD)

59

3-924-645-01 BRACKET (HEAD)

60

3-924-685-01 SPRING (AZIMUTH), COMPRESSION

61

3-704-197-31 SCREW (IB LOCK)

62

3-375-135-01 SCREW (1.4), SPECIAL

63

3-376-177-01 SCREW (M1.4X3.8)

64

3-925-107-01 SPRING (IDLER), COMPRESSION

65

3-924-637-01 GEAR (FF)

66

3-924-673-01 GEAR (S REEL)

67

3-924-674-01 SPRING (B. T), COMPRESSION

68

3-924-641-01 GEAR (T REEL)

69

3-936-582-03 SPRING (GROUND), TORSION

70

3-924-681-01 BELT (CAPSTAN)

71

1-649-600-11 MOTOR FLEXIBLE BOARD

72

3-376-407-01 SCREW (M1.4) (MOTOR)

73

3-034-903-01 SPRING (POWER TENSION), TENSION

74

3-348-160-11 SCREW (M1.4X1.6), PRECISION PAN

75

3-018-522-01 COUNTER, BRACKET

76

3-924-675-01 PULLEY (COUNTER)

77

3-924-683-01 BELT (COUNTER)

78

3-376-407-01 SCREW (M1.4)

80

3-561-685-01 SHEET (C), INSULATING

81

4-969-980-21 SCREW (IB LOCK)

HRP901 1-500-073-51 HEAD, MAGNETIC (RECORD/PLAYBACK)

M901

1-698-875-11 MOTOR, DC (CAPSTAN/REEL) (WITH PULLEY)

(1)

CABINET  SECTION

3

23

23

23

2

1

4

5

22

21

20

19

18

17

16

1

14

13

15

23

SP901

24

(including MIC101)

9

7

6

11

10

8

12

23

26

27

25

MT-40-118

63

62

61

60

59

58

74

64

65

66

67

69

68

M901

70

81

73

77

76

52

53

54

55

56

75

78

51

HRP901

57

72

71