LG FFH-818-A Schematic

4

SERVICING PRECAUTIONS

NOTES REGARDING HANDLING OF THE PICK-UP

1. Notes for transport and storage

1) The pick-up should always be left in its conductive bag until immediately prior to use.

2) The pick-up should never be subjected to external pressure or impact.

2. Repair notes

1) The pick-up incorporates a strong magnet, and so should never be brought close to magnetic materials.

2) The pick-up should always be handled correctly and carefully, taking care to avoid external pressure and impact. If it is subjected to strong pressure or impact, the result may be an operational malfunction and/or damage to the printed-circuit board.

3) Each and every pick-up is already individually adjusted to a high degree of precision, and for that reason the adjustment point and installation screws should absolutely never be touched.

4) Laser beams may damage the eyes! Absolutely never permit laser beams to enter the eyes! Also NEVER switch ON the power to the laser output part (lens, etc.) of the pick-up if it is damaged.

5) Cleaning the lens surface If there is dust on the lens surface, the dust should be cleaned away by using an air bush (such as used for camera lens). The lens is held by a delicate spring. When cleaning the lens surface, therefore, a cotton swab should be used, taking care not to distort this.

6) Never attempt to disassemble the pick-up. Spring by excess pressure. If the lens is extremely dirty, apply isopropyl alcohol to the cotton swab. (Do not use any other liquid cleaners, because they will damage the lens.) Take care not to use too much of this alcohol on the swab, and do not allow the alcohol to get inside the pick-up.

Storage in conductive bag

Drop impact

NEVER look directly at the laser beam, and don

¡˙t let

contact fingers or other exposed skin.

Magnet

How to hold the pick-up

Pressure

Cotton swab

Conductive Sheet

5

NOTES REGARDING COMPACT DISC PLAYER REPAIRS

1. Preparations

1) Compact disc players incorporate a great many ICs as well as the pick-up (laser diode). These components are sensitive to, and easily affected by, static electricity. If such static electricity is high voltage, components can be damaged, and for that reason components should be handled with care.

2) The pick-up is composed of many optical components and other high-precision components. Care must be taken, therefore, to avoid repair or storage where the temperature of humidity is high, where strong magnetism is present, or where there is excessive dust.

2. Notes for repair

1) Before replacing a component part, first disconnect the power supply lead wire from the unit

2) All equipment, measuring instruments and tools must be grounded.

3) The workbench should be covered with a conductive sheet and grounded. When removing the laser pick-up from its conductive bag, do not place the pick-up on the bag. (This is because there is the possibility of damage by static electricity.)

4) To prevent AC leakage, the metal part of the soldering iron should be grounded.

5) Workers should be grounded by an armband (1MΩ)

6) Care should be taken not to permit the laser pick-up to come in contact with clothing, in order to prevent static electricity changes in the clothing to escape from the armband.

7) The laser beam from the pick-up should NEVER be directly facing the eyes or bare skin.

Armband

Conductive Sheet

Resistor (1 Mohm)

6

ESD PRECAUTIONS

Electrostatically Sensitive Devices (ESD)

Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive Devices (ESD). Examples of typical ESD devices are integrated circuits and some field-effect transistors and semiconductor chip components. The following techniques should be used to help reduce the incidence of component damage caused by static electricity.

1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any electrostatic charge on your body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging wrist strap device, which should be removed for potential shock reasons prior to applying power to the unit under test.

2. After removing an electrical assembly equipped with ESD devices, place the assembly on a conductive

surface such as aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly.

3. Use only a grounded-tip soldering iron to solder or unsolder ESD devices.

4. Use only an anti-static solder removal device. Some solder removal devices not classified as "anti-static" can

generate electrical charges sufficient to damage ESD devices.

5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ESD

devices.

6. Do not remove a replacement ESD device from its protective package until immediately before you are

ready to install it. (Most replacement ESD devices are packaged with leads electrically shorted together by conductive foam, aluminum foil or comparable conductive materials).

7. Immediately before removing the protective material from the leads of a replacement ESD device, touch the

protective material to the chassis or circuit assembly into which the device will by installed.

CAUTION : BE SURE NO POWER IS APPLIED TO THE CHASSIS OR CIRCUIT, AND OBSERVE ALL OTHER

SAFETY PRECAUTIONS.

8. Minimize bodily motions when handing unpackaged replacement ESD devices. (Otherwise harmless motion

such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity sufficient to damage an ESD device).

ADJUSTMENTS

This set has been aligned at the factory and normally will not require further adjustment. As a result, it is not recommended that any attempt is made to modificate any circuit. If any parts are replaced or if anyone tampers with the adjustment, realignment may be necessary.

IMPORTANT

1. Check Power-source voltage.

2. Set the function switch to band being aligned.

3. Turn volume control to minimum unless otherwise noted.

4. Connect low side of signal source and output indicator to chassis ground unless otherwise specified.

5. Keep the signal input as low as possible to avoid AGC and AC action.

TEST & ADJUSTMENT POINT

Figure 1. Main P.C. Board(FFH-717)

- 8 -

VR201

(Adjustment Point)

L203

(Rec Bias)

L105

(LW/SW USABLE

SENSITIVITY)

L016

(DC VOLTAGE)

L017 (MW USABLE SENSITIVITY)

TAPE DECK ADJUSTMENT

1. AZIMUTH ADJUSTMENT

Figure 3. Azimuth Adjustment Connection Diagram

CH1 CH2

Speaker Out

Playback Mode

Head

Test Tape MTT-114

L ch

R ch

GND

Dual-trace synchroscope

Electronic Voltmeter

L out

R out

Unit

Figure 2. Main P.C. Board(FFH-818)

Deck Mode Test Tape Test Point Adjustment Adjust for

A Deck Playback MTT-114 Speaker Out

DECK Screw

Maximum

Azimuth Screw

B Deck Playback MTT-114 Speaker Out Azimuth Screw Maximum

VR201

(Adjustment Point)

L203 (Rec Bias)

L105

(LW/SW USABLE

SENSITIVITY)

L016

(DC VOLTAGE)

L017

(MW USABLE SENSITIVITY)

- 9 -

- 10 -

3. RECORD BIAS ADJUSTMENT

Head

Unit

PN202

GND

Record/Playback head

Test Tape MTT-5511

Record/Playback and Pause Mode

Frequency Counter

Deck Mode Test Tape Test Point Adjustment Adjust for

Rec/Pause MTT-5511

ERASE HEAD

L203 85kHz±5kHz

WIRE(PN202)

Figure 5. Record Bias Adjustment Connection Diagram

4. TUNER ADJUSTMENT

Figure 6. Tuner(S curve) Adjustment Connection Diagram

Unit

Signal Generator

GND

Electronic OSCILLOSCOPE

FM Antenna Terminal

Speake

Item Test Point Adjustment Adjust for

DC Voltage Checker Pin L106 0V

50mV

MW Usable

Speaker Out L107 Maximum

Sensitivity

LW/SW Usable

Speaker Out L105 Maximum

Sensitivity

2. MOTOR SPEED ADJUSTMENT

Figure 4. Motor Speed Adjustment Connection Diagram

Head

Playback Mode

Unit

Speaker Out

GND

L out

R out

Record/Playback head

Test Tape MTT-111

Frequency Counter

Deck Mode Test Tape Test Point Adjustment Adjust for Remark

Normal Speed MTT-111 Speaker Out VR201 3kHz ± 1% A Deck

HI-Speed MTT-111 Speaker Out more than 5.4kHz HI-Speed Dubbing Mode

- 41 -

EXPLODED VIEW/PARTS LIST

CABINET

A05

A16

A14

A10

A11

A02

A03

A25

A01

A33

A17

A36

A19

A31

A23

A37

A04

A12

A13

A32

A20

A22

A39

A18

A34

A27

A26

A09

A08

A06

A21

A15

A07

A38

A35

A01 3720SCM038A(*) PANEL FRONT HZ

A02 3580SCA346A DOOR CST LEFT HZ

A01 3720SCM038A PANEL FRONT HZ

A02 3580SCA346A DOOR CST HZ

A03 3580SCA347A DOOR CST RIGHT HZ

A04 3580SCC878B DOOR CD HZ

A05 3550SC0008C COVER FRONT HZ

A06 4940SC0053A KNOB JOG HZ

A07 3680SC0004A LENS JOG HZ A08 3790SCM056C( *) WINDOW CST-L(FOR FFH-717) HZ

3790SCM056E(*) WINDOW CST-L(FOR FFH-818) HZ

A09 3790SCM057A WINDOW CST-R HZ

A10 3790SCM058A WINDOW AMP HZ

A11 3790SCM059A WIMDOW CD HZ

A12 4940SC0051A KNOB TUNING HZ

A13 4940SC0052B KNOB PLAY & FUNC HZ

A14 4940SC0055A KNOB VOL HZ

A15 3680SC0005A LENS SET HZ

A16 3508SB0001A DECORATION HI-TONE

A17 4901SK0001C DAMPER ASSY HZ

A18 3140S-P907A CHASSIS MAIN HZ

A19 3720S-0036D PANEL SIDE HZ

A20 3090S-0003F CABINET TOP HZ

A21 447-938K CUSHION CUSHION RUBBER(MTR-400/50) HZ

A22 3720SCM409A(*) PANEL BACK(FOR FFH-717) HZ

3720SCM043A(*) PANEL BACK(FOR FFH-818) HZ

A23 6410SCE200A POWER CORD CE-503PLUG CHAUS CE 2000M HZ

A24 632N218E COIL, ANTENNA KS951212-01 KWANGSUNG HZ

A25 442-577B SPRING SPRING CST-PACK(H=7.5)

A26 442-085A SPRING SPRING-DOOR

A27 384-535A GUIDE EJECT AY

A28 4930S-0536A HOLDER HOLDER GUIDE

A29 442-780A SPRING

A30 384-014A GUIDE EJECTOR

A31 265-013B FOOT RUBBER(NBR)

A32 246-444K DECORATION PLATE FFHKL588V SILVER HZ

A33 353-025T SCREW TAPTITE 3X10.5 FZMY HZ

A34 353-025C SCREW TAPTITE 3X10 FBK HZ

A35 1TRL0402418 BRAIZER HEAD TA D 4.0 L 8.0 MSWR3/FZY HZ

A36 6730S-G005B DECK MECHANISM ADR2400FF SAMSUNG HZ

A37 4405SCE002A MECHANISM ASSY CDM-H1303 SHIN HEUNG CD HZ

A38 4920S-E007A HEAT SINK MAIN HZ

A39 4810S-0901A BRACKET IC HZ

SS LL OOCCAA ..NNOO.. PPAARRTT NNOO..((GGSS)) DDEESSCCRRIIPPTTIIOONN SSPP EECCIIFFIICCAATT IIOONN VV CC

ƒUVC Shows the origin of local ports(HZ:LGEHZ) ƒU* : Refer to the SPPL (Service Parts Price List).

- 42 -

TAPE DECK MECHANISM:AUTO STOP DECK(OPTIONAL)

9

8

1

47

34

4

8

46

40

58

56

84

45

27

55

41

12

25

13

53

26

21

69

16

7

33

43

54

15

66

14

23

82

49

62

28

38

67

8

1

29

47

34

4

8

46

58

56

84

45

27

55

41

39

36

12

25

13

53

26

21

68

16

7

33

43

54

15

66

14

23

82

49

62

28

38

67

9

36

39

72

61

59

93

3

31

61

59

93

3

31

64

108

109

110

112

61

20

81

94

29

113

74

90

89

88

61

115

90

88

61

74

9

36

39

85

117

80

117

79

B

D

E

A

D

C

REF.NO. PART NAME PART NO. Q'TY

- DECK MECHANISM 6730S-G005B 1 CHASSIS MAIN NSP 2 2 BASE HEAD C NSP 0 3 BASE HEAD D NSP 2 4 PLATE SPRING NSP 2 5 BARK MOTOR 110 NSP 0 6 BARK MOTOR 128 NSP 0 7 PLATE PLYWHEEL F NSP 2 8 CHIP REEL NSP 4 9 BASE REEL NSP 4

10 BRACKET HEAD NSP 0 11 GEAR HEAD C NSP 0 12 GEAR CAM NSP 2 13 GEAR IDLER NSP 2 14 BUSH C NSP 2 15 PULLEY C NSP 2 16 PULLEY F/W F NSP 2 17 PULLER F/W R NSP 0 18 BRKT HEAD B NSP 0 19 GEAR HEAD B NSP 0 20 PULLEY M/T YDW NSP 1 21 LEVER BRAKE NSP 2 22 GEAR DIR NSP 0 23 ARM PINCH F 6768SCAS03A 2 24 ARM PINCH R NSP 0 25 ARM CAM LOCK NSP 2 26 ARM RF NSP 2 27 GEAR RF NSP 4 28 CAP C NSP 2 29 LEVER EJECT 6768SCDS03A 2 30 GUIDE MOTOR NSP 0 31 TAPE GUIDE NSP 2 32 LEVER AC NSP 0 33 W/S(2.3ƒN3.5ƒN0.25) NSP 2 34 W.S(1.8ƒN4ƒN0.5) NSP 2 35 W/S(1.6ƒN3.5ƒN0.5) NSP 0 36 W/S(3.6ƒN6ƒN0.5) NSP 4 37 W/S(6ƒN11ƒN0.25) NSP 0 38 W/S(1.2ƒN3.2ƒN0.25) NSP 2 39 W/S(4.6ƒN71ƒN0.13) NSP 4 40 SHAFT PINCH NSP 2 41 SHAFT IDLER NSP 2 42 PIN AZIMUTH NSP 0 43 SHAFT RF NSP 2 44 SHAFT F/W R NSP 0 45 SHAFT F/W F NSP 2 46 S/P B.T(F) NSP 2 47 S/P B.T(R) NSP 2 48 S/P LEVER AC NSP 0 49 S/P BASE HEAD NSP 2 50 S/P DIR NSP 0 51 S/P PINCH(F) 6768SCSS02A 0 52 S/P PINCH(R) NSP 0 53 S/P ARM CAM LOCK NSP 2 54 S/P C NSP 2 55 S/P ARM RF NSP 2 56 S/P P/R(F) NSP 2 57 S/P P/R(R) NSP 0 58 S/P PINCH 1-WAY NSP 2 59 S/P AZIMUTH NSP 2 60 (HEAD)PH M1 6ƒN8 NSP 0 61 (NORMAL)BH M2ƒN4 NSP 6

REF.NO. PART NAME PART NO. Q'TY

62 (MOTOR)PH M2 6ƒN5 NSP 0 63 (BAKT)Tapping M26ƒN4 NSP 0 64 S/C AZIMUTH(M2ƒN8) NSP 2 65 (AZIMUTH)M2ƒN5.7 NSP 0 66 FELT C NSP 2 67 BELT SUB(34.7) NSP 2 68 BELT 110 ¢¤“ 54.3 6768SCBS03B 1 69 BELT 110˘¤ “ 76.2 6768SCBS03C 1 70 BELT 128 ¢¤“ 54.3 NSP 0 71 BELT 128˘¤ “ 80.8 NSP 0 72 BELT SR ¢¤“ 66.3 NSP 0 73 BELT TR ¢¤“ 66.3 NSP 0 74 PCB CTRL SINGLE NSP 2 75 PCB CTRL DOUBLE NSP 0 76 CONN R/P(16P) NSP 0 77 CONN R/P(13P) NSP 0 78 CONN PB(10P) NSP 0 79 CONN HEAD(6P) NSP 1 80 CONN HEAD(3P) NSP 1 81 WIRE MOTOR(4P-80) NSP 1 82 ROLLER PINCH 6768SCRS01A 2 83 WEDGE NSP 2 84 SOLENOID(24) 6768SCVS02A 2 85 REFLECTOR NSP 2 86 METAL FG F(CAPS) NSP 2 87 METAL FG R(CAPS) NSP 0 88 PHOTO SENSOR NSP 2 89 SETECT(MXS00220) NSP 5 90 SWITCH MODE 6768SCTS01B 2 91 HEAD R/P NSP 0 92 HEAD P/B NSP 0 93 HEAD 1-WAY 6768SCHS01A 2 94 MOTOR(YD2BH) 6768SCQS01A 1 95 WIRE HEAD(BRN) NSP 0 96 WIRE HEAD(BLU) NSP 0 97 WIRE HEAD(GRN0 NSP 0 98 WIRE HEAD(ORA) NSP 0

99 WIRE HEAD(RED) NSP 0 100 WIRE HEAD(WHT) NSP 0 101 WIRE HEAD(YEL) NSP 0 102 103 104 DIODE NSP 2 105 RESISTOR NSP 2 106 SHAFT SUB NSP 0 107 M/T GUIDE NSP 0 108 HEAD ERASE 6768SCHS03A 1 109 (M/T)MACH M2.6 4 NSP 3 110 CUSHION MOTOR NSP 3 111 BRKT MOTOR D2 NSP 0 112 BRKT MOTOR D1 NSP 1 113 CONN R/P(12P) NSP 1 114 CONN R/P(11P) NSP 0 115 CONN PB(8P) NSP 1 116 PH M2 9(E-HEAD) NSP 1 117 PCB HEAD NSP 2

£ HEAD ASSY RP5 6768SCES03A

£ HEAD ASSY RP6 6768SCES03B

£ Pulley F/W F ASSY 6268SCJS02A

£ ARM Pinch F ASSY 6768SCAS01B

£ MOTOR ASSY 6768SCOS01A

NSP: Not Serviceable Part

- 43 -

TAPE DECK MECHANISM:AUTO REVERSE DECK(OPTIONAL)

7

1

43

47

37

21

52

31

4

7

42

46

51

73

41

24

50

38

74

30

8

40

14

9

22

10

48

23

18

64

13

6

30

39

49

12

61

11

20

37

44

32

57

25

35

62

8

72

7

1

26

43

31

4

7

42

53

51

71

73

40

24

50

38

8

9

22

10

48

23

18

63

13

6

30

39

49

12

61

11

20

37

44

25

35

62

8

72

66

65

77

76

75

59

54

79

2

28

71

26

17

80

68

29

19

60

15

56

16

3

58

5

27

88

89

A

D

C

F

E

G

D

B

REF.NO. PART NAME PART NO. Q'TY

- DECK MECHANISM 6730S-G005A 1 CHASSIS MAIN NSP 2 2 BASE HEAD C NSP 1 3 BASE HEAD D NSP 1 4 PLATE SPRING NSP 2 5 BRKT MOTOR 110 NSP 1 6 PLATE FLYWHEEL F NSP 2 7 CHIP REEL NSP 4 8 BASE REEL NSP 4 9 GEAR CAM NSP 2

10 GEAR IDLER NSP 2 11 BUSH C NSP 2 12 PULLEY C NSP 2 13 PULLEY F/W F NSP 2 14 PULLEY F/W R NSP 1 15 BRKT HEAD B NSP 1 16 GEAR HEAD B NSP 1 17 PULLEY M/T TDW NSP 1 18 LEVER BRAKE NSP 2 19 GEAR DIR NSP 1 20 ARM PINCH F 6768SCAS03A 2 21 ARM PINCH R 6768SCAS04A 1 22 ARM CAMLOCK NSP 2 23 ARM RF NSP 2 24 GEAR RF NSP 4 25 CAP C NSP 1 26 LEVER EJECT 6768SCDS03A 2 27 GUIDE MOTOR NSP 1 28 TAPE GUIDE NSP 1 29 LEVER AC NSP 1 30 W/S(2.3*3.5*0.25) NSP 3 31 W/S(1.8*4*0.5) NSP 2 32 W/S(1.6*3.5*0.5) NSP 1 33 W/S(3.6*6*0.5) NSP 4 34 W/S(6*11*0.25) NSP 4 35 W/S(1.2*3.2*0.25) NSP 2 36 W/S(4.6*7.1*0.13) NSP 4 37 SHAFT PINCH NSP 3 38 SHAFT IDLER NSP 2 39 SHAFT RF NSP 2 40 SHAFT F/W R NSP 1 41 SHAFT F/W F NSP 2 42 SPRING B/T(F) NSP 2 43 SPRING B/T(R) NSP 2 44 SPRING BASE HEAD NSP 2

44-1 SPRING LEVER AC NSP 1

45 SPRING DIR NSP 1 46 SPRING PINCH(F) 6768SCSS02A 1 47 SPRING PINCH(R) 6768SCSS03A 1 48 S/P ARM CAM LOCK NSP 2

REF.NO. PART NAME PART NO. Q'TY

49 SPRING C NSP 2 50 SPRING ARM RF NSP 2 51 SPRING P/RETURE(F) NSP 2 52 SPRING P/RETURN(R) NSP 1 53 SPRING PINCH 1-WAY NSP 1 54 SPRING AZIMUTH NSP 1 55 PH M1.6*8 NSP 2 56 BH M2*4 NSP 4 57 PH M2.6*5 NSP 2 58 TAPPING M2.6*4 NSP 4 59 AZIMUTH S/C 1-WAY NSP 1 60 AZIMUTH S/C M2*5.7 NSP 2 61 FELT C NSP 2 62 BELT SUB(PI33.1) NSP 2 63 BELT 110 ¢ NSP 1 64 BELT 110 ˘ NSP 1 65 PCB CONTROL DOUBL NSP 1 66 CONNECTOR(16P) NSP 1 67 CONNECTOR(6P) NSP 1 68 WIRE MOTOR(4P-80) NSP 1 69 ROLLER PINCH 6768SCRS01A 3

70 WEDGE( ”˛`˘ ) NSP 1 71 SOLENOID(24 OHM) 6768SCVS02A 2 72 REFLECTOR NSP 2 73 METAL FG F(CAPSTAN) NSP 2 74 METAL FG R(CAPSTAN) NSP 1 75 PHOTO SENSOR NSP 2 76 SWITCH DETECT NSP 6 77 SWITCH MODE 6768SCTS01B 2 78 HEAD R/P NSP 1 79 HEAD 1-WAY NSP 1 80 MOTOR(YD2BH) 6768SCQS01A 1 81 WIRE HEAD(BRN) NSP 1 82 WIRE HEAD(BLU) NSP 1 83 WIRE HEAD(GRN) NSP 1 84 WIRE HEAD(ORA) NSP 1 85 WIRE HEAD(RED) NSP 1 86 WIRE HEAD(WHT) NSP 1 87 WIRE HEAD(YEL) NSP 1 88 Head PCB NSP 1 89 CONN Head(3P) NSP 1

£ HEAD ASSY RP6 6768SCES03B £ BRK HEAD ASSY RP1 6768SCES04A £ ARM Pinch R ASSY 6768SCAS01A £ ARM Pinch F ASSY 6768SCAS01B £ Pulley F/W F ASSY 6268SCJS02A £ MOTOR BRKT ASSY 6768SCPS01A £ MOTOR ASSY 6768SCOS03A

NSP: Not Serviceable Part

- 44 -

EXPLODED VIEW/PARTS LIST

CD MECHANISM

4

36

38

35

34

25

24

20

21

20

18

19

28

23

22

37

33

32

31

30

27

29

4

26

10

9

8

7

6

3

5

2

1

12

13

14

15

16

17

22

11

REF.NO. PART NO. DESCRIPTION

- 4405SCE002A CD MECHANISM ASSÕY(CDM-H1303)

1 4680SBP001A MOTOR PULLEY ASSÕY

2 4400SB0001A BELT MAIN

3 4470SB0005A GEAR MAIN

4 88H-0004 SCREW(3X12X12)

5 4470SB0007A GEAR PU UP-A

6 4470SB0008A GEAR PU UP-B

7 4470SB0006A GEAR PU DOWN

8 4470SB0004A GEAR LOADING

9 4470SB0003A GEAR PULLEY

10 6871SB21RAD PCB ASSÕY CLOSE

11 353S353F SCREW D2.6 L4.0

12 4974SB0001A GUIDE CAM

13 4970SBN002A SPRING CAM

14 6871SC21RAD PCB ASSÕY OPEN

15 6871SD21RAD PCB ASSÕY CAM

16 88H-0004 SCREW(3X12X12)

17 3040SB0002A BASE MAIN

18 4405SCB001A MECHANISM ASSÕY(KSM-213CCM)

19 6756SBX001A SCREW(2.6X10X10)

20 4900SB0001A DAMPER RUBBER

21 3040SB0003A BASE PU(CDM-H1303)

22 88H-0002 SCREW(3X9X12)

23+24+25 4860SB0002A CLAMP ASSÕY

23 4860SB0001A CLAMP DISC

24 524-012A COVER CLAMP MAGNET

25 3550SB0001A COVER MAGNET

26 4471SB0001A GEAR CAM ASSÕY

27 353-025B SCREW D3.0 L8.0

28 88H-0003A SCREW(3X12X10)

29 4974SB0003A GUIDE WORM

30 6871SF21RAD PCB ASSÕY SENSOR

31 4371SB0002A SHAFT ASSÕY TRAY

32 4400SB0001B BELT TRAY

33 3390SB0001A TRAY LOADING

34 6870SE21RAB PCB ASSÕY TRAY

35 4680SBP002A MOTOR ASSÕY TRAY

36 3390SB0002A TRAY DISC

37 4470SB0010A GEAR TRAY A

38 4470SB0011A GEAR TRAY B

- 45 -

EXPLODED VIEW/PARTS LIST

OPTICAL PICK-UP CARRIAGE

REF.NO. PART NO DESCRIPTION Q'TY REMARK

4405SCB001A MECHANISM ASSEMBLY, KSM-213CCM 1 SP

1 88S-0099 TT CHASSIS ASSÕY 1 NSP

2 88S-0089 INSULATOR(S) 4 NSP

3 6756S-O001A MOTOR 1 NSP

4 88S-0088 SLIDE SHAFE(S) 1 NSP

5 6756S-G001A GEAR 1 SP

NSP: Not Serviceable Part

SP: Serviceable Part

REF.NO. PART NO DESCRIPTION Q'TY REMARK

6 88S-0101 +P 2 3 2 NSP 7 6756S-T001A SWITCH 1 SP

8 88S-0098 MOTOR BASE(6P) 1 NSP

9 6756S-X001A PICK-UP, KSS-213C 1 SP

10 88S-0100 CONNECTOR 6P 1 NSP

- 30 -

Pre Out

Ch2

3.3µF

1000µF

47µF

0.018µF

1000µF

3.3µF

47µF

1.2µF

100 µF

R . R

Vcc

1000 µF

47µF

0.018µF

10kΩ

150kΩ

1MΩ

2.2kΩ

Rec IN Ch2

Rec

IN

Rec IN Ch1

ALC

Rec Out Ch2

180kΩ

Gv

Gvo

180kΩ

1kΩ

100kΩ

100Ω

10kΩ

10Ω

300kΩ

9.1kΩ

100Ω

Pre IN Ch2/B

(Play Rec)

Pre IN Ch2/A

(Play only)

Pre IN Ch1/B

(Play Rec)

Pre Out

Ch1

Pre IN Ch1/A

Ch1/B

NF

Ch2/A

Ch1/A

Ch1/B

Gvo

Gv

Gvo

Gv

Vcc

M

N

NF

Ch1

Ch2

Gvc

GV

Ch2

ALC

GND

Rec

15

14

13

12

11

23

24

1

2

161718192122

IN

Vref1

Vref

Vref2

A/B

Metal Out

Pre Out

REC Out

Rec Out Ch1

Mix Out

GND1 M/N

6.8kΩ

A

B

1000pF

6.8kΩ

9.1kΩ

20

10 9876435

M/N

REC SW REC SWGND P/B SW P/B SWCONT GND GNDV

CC

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KA3082

KIA6289N

- 30 -

INTERNAL BLOCK DIAGRAM OF ICs

LA1837

- 31 -

KA8301

KIA7805 P/PI ~ KIA7824P/PI

DRIVER

PRE

LOGIC

2 3 4 5 6 7 8 9 101

GND

Vout1

Vz1VrFin

Rin

Vcc1

Vcc2

Vz2

Vout2

3

1

2

4

R

12

R

1

C

21

R

12

Q

1

Q

7

Q

13

Q

10

Q

6

Q

5

Q

4

Q

3

Q

11

Q

15

Q

14

Q

9

Q

8

Q

16

Q

17

Q

INPUT

OUTPUT

GND

2

Q

1

Z

18

R

8

R

9

R

13

R

11

R

17

R

5

R

6

R

1

R

2

R R

16

R

20

R

19

R

14

R

10

R

7

R

- 32 -

LC7273M

TDA7440D

+5V

VREF

CINFLOUTVREF

Vdda

Vssa

MPXIN

TEST

XIN XOUT

Vssd

Vddd

RDCL

RDDA

MODE

RST

RDS-ID READY

CLK(4.332MHz)

SMOOTHING

FILTER

OSC

PLL

(57kHz)

DATA

DECODER

RAM

(128bit)

RDS-ID

DETECT

CLOCK

RECOVERY

(1187.5Hz)

ANTIALIASING

FILTER

REFERENCE

VOLTAGE

57kHz

BPF

(SCF)

TEST

L-IN1

100K

4 8 9 18

27

21 22

20

26

24 25

LOUT

SCL SDA

DIG_GND

ROUT

V

S

AGND

R

B

R

B

14 15

10 11 19 12 13 23

5

G

6

7

3

2

INPUT MULTIPLEXER

+GAIN

MUXOUTR INR TREBLE(R) BIN(R) BOUT(R) CREF D98AU883

0/30dB

2dB STEP

MUXOUTL

VOLUME TREBLE

I CBUS DECODER + LATCHES

BASS

SPKR ATT

LEFT

VOLUME TREBLE BASS

SUPPLY

V

REF

SPKR ATT

RIGHT

INL TREBLE(L) BOUT(L)BIN(L)

1

28

L-IN2

L-IN3

L-IN4

R-IN1

R-IN2

R-IN3

R-IN4

2

- 33 -

STK411-220E

- 34 -

MSGEQ7

Audio

In

Anti-Alias

Filter

Clock

Oscillator

Output

Multiplexor

CKIN

Reset

63Hz

Bandpass

160Hz

Bandpass

400Hz

Bandpass

1kHz

Bandpass

2.5kHz

Bandpass

6.25kHz

Bandpass

16kHz

Bandpass

Peak

Detector

Peak

Detector

Peak

Detector

Peak

Detector

Peak

Detector

Peak

Detector

Peak

Detector

Strobe

DC Out

LC72131, 72131M

B01 B02 B03 B04 I01 I02

XIN

PD

AIN

AOUT

IFIN

XOUT

FMIN

AMIN

CE

DI

CL

D0

VDD

VSS

REFERENCE DIVIDER

PHASE DETECTOR CHARGE PUMP

UNLOCK DETECTOR

UNIVERSAL COUNTER

DATA SHIFT REGISTER

LATCH

12bits PROGRAMMABLE

DIVIDER

SWALLOW COUNTER

1/16. 1/17 4bits

POWER

ON

RESET

CCB

I/F

1

2