LG FFH 175 Schematic

- 2 -

CONTENTS

MICRO COMPONENT SYSTEM

1. SERVICING PRECAUTIONS 3

2. ESD PRECAUTIONS 5

3. SPECIFICATIONS 6

4. ADJUSTMENTS 8

5. MAJOR WAVEFORM 11

6. TROUBLESHOOTING GUIDE 14

7. BLOCK DIAGRAM 19

8. SCHEMATIC DIAGRAM 20~23

• FRONT & KEY CIRCUIT 20

• AMP & DECK CIRCUIT 21

• TUNER CIRCUIT 22

• CDP CIRCUIT 23

9. WIRING DIAGRAM 24

10. PCB LAYOUTS 25~26

• MAIN P.C.BOARD 25

• CDP P.C. BOARD 26

11. INTERNAL BLOCK DIAGRAM OF ICs 27

12. EXPLODED VIEW/PARTS LIST 38~40

• CABINET 38

• TAPE DECK MECHANISM: AUTO STOP DECK 39

13. REPLACEMENT PARTS LIST 41~52

SPEAKER SYSTEM

1. SPECIFICATION 53

2. SCHEMATIC DIAGRAM 53

3. EXPLODED VIEW/PARTS LIST 54

- 3 -

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

Pressure

Cotton swab

Conductive Sheet

- 4 -

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)

Resistor
(1 Mohm)

- 5 -

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).

[CAUTION. GRAPHIC SYMBOLS]

THE LIGHTNING FLASH WITH APROWHEAD SYMBOL. WITHIN AN EQUILATERAL
TRIANGLE, IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE
OF UNINSULATED “DANGEROUS VOLTAGE” THAT MAY BE OF SUFFICIENT
MAGNITUDE TO CONSTITUTE A RISK OF ELECTRIC SHOCK.

THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO
ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY
INFORMATION IN SERVICE LITERATURE.

- 8 -

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.

ADJUSTMENT & TEST POINT

Figure 1. Main P.C. Board

L140
(RECORD BIAS
ADJUSTMENT)

L21
(FM IF
ADJUSTMENT)

- 9 -

TAPE DECK ADJUSTMENT

1. AZIMUTH ADJUSTMENT

Figure 3. Azimuth Adjustment Connection Diagram

2. RECORD BIAS ADJUSTMENT

Figure 4. Record Bias Adjustment Connection Diagram

TUNER ADJUSTMENT

Figure 2. Tuner(S curve) Adjustment Connection Diagram

CH1 CH2

Speaker
Terminal

Playback Mode

Head

Test Tape
MTT-114

L ch

R ch

GND

Dual-trace
synchroscope

Electronic
Voltmeter

L out

R out

Unit

Unit

26

,

28 PIN

Signal Generator

GND

Electronic
OSCILLOSCOPE

FM Antenna
Terminal

Deck Mode Test Tape Test Point Adjustment Adjust for Remark

Playback MTT-114

Speaker

Head Screw R/L Maximum

Forward:Righthand Side Screw

Terminal Reverse:Lefthand Side Screw

Item Test Point Adjustment Adjust for

DC Voltage IC10 26, 28 pin L21 0V

±50mV

Deck Mode Test Tape Test Point Adjustment Adjust for

Rec/Pause MTT-5511 Erase Head Wire L140 83kHz±5kHz

Head

Test Tape
MTT-5511

Record/Playback
Head

Record/Playback
and Pause Mode

Unit

Erase Head Wire

GND

Frequency Counter

- 10 -

CDP ADJUSTMENTS

• When change the pick-up must be confirm as follow

1. TRACKING BALANCE CONFIRMATION

1) Connect the oscilloscope to TEO and REF.(IC501 pin 54 and 71)

2) Access from 1st selection to last section of test disc (YEDS-18)

3) Confirm the normal state of tracking error signal (T.B deviation : less than ±3%)

2. RF WAVEFORM CONFIRMATION

1) Connect the oscilloscope to RF and REF.(IC501 pin 74 and 71)

2) Put a test disc (SONY YEDS-18) into unit and playback the 18th selection of the test disc.

3) Confirm the normal state of RF waveform.

4) Confirm the less than 30nS of Jitter Meter reading.

OV(DC Mode) T.B deviation(%)

= X %

A

B

A=B

A+B

A-B

2

100

3T, 4T 5T,6T 11T

EYE-PATTERN EYE-PATTERN

OK NG

- 11 -

• Connection : 1. IC501 pin 54.(TEO)

2. IC501 pin 50

• Inspection : Check tracking servo

circuit.(RWD)

• Connection : 1. IC501 pin 54 .(TEO)

2. IC501 pin 50

• Inspection : Check tracking servo

circuit.(RWD)

FOCUS GAIN TRACKING GAIN

• Connection : 3. IC502 pin 1 and 2 .

• Test disc : YEDS-43

• Inspection : Confirm focus servo circuit.

• Connection : 3. IC502 pin 26 and 27 .

• Test disc: YEDS-43

• Inspection : Confirm TRACK servo circuit.

TRACKING ERROR(REW) TRACKING ERROR(FWD)

MAJOR WAVEFORM

∆V1=0.00V TRIG 1=1.0V
∆V2=0.00V

DLY>=0.85ms

1V 1V PEAKDET 1ms 1ms

SAVE

∆T=0.00ms

∆V1=0.00V TRIG 2=1.0V
∆V2=0.00V SREF 2 A

DLY>=0.85ms

1V 1V PEAKDET 1ms 1ms

∆T=0.00ms

∆V1=0.000V TRIG 1=0.09V

DLY>=4.25ms

0.5V PEAKDET 5ms 5ms

SAVE

∆T=0.00ms

∆V1=0.0% TRIG 1=-82%

DLY>=0.170s

>1V PEAKDET 0.2s 50ms

SAVE

∆T=0.000s

1

2

3

4

1

2

- 12 -

TRACKING COIL DRIVE E.F. BALANCE

• Connection : 1. IC501 pin 54 . (TEO)

2. IC501 pin 50

• Inspection : - Confirm tracking servo circuit.

- Check IC501 (Cold solder joint
or short circuit)

• Connection : 1. IC501 pin 54 .

• Inspection : Confirm tacking servo balance

deviation rate

READING

• Connection : 7. IC501 pin

48 .

8. IC501 pin

40 (FOK)

• Inspection : Check IC502 pin 4 to IC501 PIN

48 (Pattern defective)

∆V1=0.00V TRIG 1=-0.1V
∆V2=0.00V

DLY>=0.425s

1V 2V PEAKDET 0.5s 50ms

SAVE

∆T=0.000s

∆V1=3.96V TRIG 1=1.1V

DLY>=1.70ms

1V PEAKDET 2ms 2ms

SAVE

∆T=0.00ms

∆V1=0.00V TRIG 1=0.2V
∆V2=0.00V

DLY>=0.425s

2V 5V PEAKDET 0.5s 50ms

SAVE

∆T=0.000s

1

1

2

7

8

- 13 -

• Connection : 9. IC502 pin 17 and 18

• Inspection : - Check IC501 pin 43 to IC502

pin 20 (Pattern defective)

- Check voltage. (IC502 pin 20 )

• Connection : 10. IC501 pin 74 .

• Inspection : Check objective Lens of Pickup

clear or not

• Connection : 11. IC502 pin 1 and 2 .

• Inspection : - Is focus search signal output to

IC501 pin 48 ?

• Connection : 12. IC501 pin 33 .

• Inspection : Check IC503 and surrounding

circuit (Cold solder joint or short
circuit)

TRIG 1=1.1V

∆V2=0.000V

DLY>=0.085s

0.5V PEAKDET 0.1s 50ms

SAVE

∆T=0.000s

TRIG 1=24%

DLY>=0.670ms

50mV 0.5ms 0.5ms

∆V1=0.00V TRIG 1=0.3V

DLY>=0.085s

2V PEAKDET 1s 50ms

SAVESREF 3 A

∆T=0.00s

>2V

9

11

12

10

- 14 -

TROUBLESHOOTING GUIDE

CD PART

Is the function selector in the CD position?

Is power turned ON?

Does initial reading occur?

Can disc be played?

Is audio output supplied?

OK

END

• Check power supply circuitry.

• Check laser circuitry.

• Check focusing circuitry.

• Check disc.

• Check tracking servo circuitry.

• Check Audio circuitry.

YES

YES

YES

YES

YES

NO

NO

NO

NO

- 15 -

1-1.8V

2.5V

1. If initial reading is not carried out (with disc)

YES

YES

YES

YES

YES

YES

YES

YES

YES

NO

NO NO

NO NO

NO

NO

NO

NO

NO

NO

Is IC601 pin 22 output
waveform normal?

Door open

(3.2V~5V)

Door close(1.9V~2.5V)

Does laser light?

• Leaf SW contact defective.

• Connector defective.

• Pattern short.

Does disc motor rotate?

Is HF
waveform
output?
IC501 pin 74

Is tracking servo
operating?

Is the lower
envelope of HF
(RF) waveform
flat?

Is signal output
at IC501 pin
50?

Is signal output at tracking
output IC502 pin 26, 27?

Does IC503 pin 25 (LKFS) as
figure?

Is retation normal?

Is there any irregularity in
frequency?

Is HF signal normal without
dropout?

Is TER signal
output, at
IC501 pin
54?

• IC501
defective.

• Connector
defective.

• Pick up
defective.

• Pattern
defective.

• IC502 or pattern

defective.

• Pick up
defective.

• Connector
defective.

• IC501 or IC503

defective.

• PLL CIRCUIT

defective.

• Disc initial reading
damaged or
defective.

• CLV
SERVO(R530,
C535, C536, R531)
circuit defective.

- 16 -

A

NO

NO

NO

NO

NO

NO

NO

NO

NO

When laser does not light

Is below signal “H” at IC501 pin
38 (RESET)?

Has Laser Power source returned to
the Q501?

(Q501 Collector Voltage about 1.8V)

Does generate about 3.3V at IC501
pin 70 (LD)?

Flow Laser Current?

Both voltage of 507 is about 1.0V?

Are data transferred from
IC601?

IC601 pin 95 : XLT

pin 94 : XRST
pin 98

: DATA

pin 97: CLK

Is below signal output at
IC502 pin 17, 18?

• IC601 defective.

• IC501 defective.

•

Surrounding Circuitry defective.

• Connector defective.

• Pick-up defective.

• IC501, 502 defective.

• Slide motor defective.

• Connector defective.

• IC505 defective.

• LMT SW defective.

• Connector defective.

• IC502 defective.

•

Q501 defective, connector defective.

• Laser defective.

• Laser defective.

•

Connector defective. short etc.

Has Pick-up returned to the
innermost position?

Does pick-up stop after
having moved to the
innermost position?

Are detect output input at
IC601 pin 22?

R507»1.0V

R507«1.0V

YES

YES

YES

YES

(2.5V)

OPEN

CLOSE
(1.95V)

YES

YES

YES

YES

YES

YES

[

- 17 -

B

C

Amplitude 0.5~1.5v

IC501 Pin

74

HF

FOK

IC501 Pin

40

Do lenses move up and down?

Is signal output at focus
search terminal?

IC 501 pin 48 (FEO)

Is signal output at IC502
pin 1 , 2 ?

When laser light

• IC501 defective.

• C527 defective.

• IC 502 defective.

• IC501 defective.

• Pattern defective.

• Actuator short.

• Connector short.

• Connector short.

• IC501 defective.

• Pick-up defective.

• Turntable height error

• Laser diode degraded.

Is IC501 pin 74 (HF) signal waveform
output?

The waveform of IC501 pin 74 (HF) is
below figure?

Is Fok signal intput to IC601 pin 99 ?

Is Fok signal output?
(HF and REF) 0.4 over OK.

YES

YES

YES

YES

YES

YES

YES

NO

NO

NO

NO

NO

NO

NO

- 18 -

FER

SENSE

(ISTAT)

C

at Start

Is FER signal output? IC501 Pin 59?

Is FZC signal output at IC501 Pin 31
(SENS)?

Is Mon signal output by
IC503 Pin 73?

Is MDP signal output by
IC503 Pin 75?

Has voltage at disc motor?

(IC502 pin 11, 12 )

• IC501 defective.

• Pick up defective.

• Connector defective.

• IC501 defective.

• Pattern defective between.

• IC503 Pin 27,36,37,38 and IC601.

• IC501, 502 defective.

• Surrounding circuity defective.

• Disc Motor defective.

• Connector defective.

When Fok focus
Servo Conform by
FZC signal

NO

NO

NO

NO

YES

YES

YES

YES

YES

- 28 -

■ 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

C B

I/F

1

2

2

■ TDA7440D

L-IN1

100K

100K

100K

100K

100K

100K

100K

100K

48918

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

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

- 29 -

■ KB9223(IC501)

OVERVIEW

The KB9223 is a 1-chip BICMOS intergrated circuit to perform the
function of RF AMP and Servo signal processor for compact disc
player application. It consist of blocks for RF signal processing,
focus, tracking, sled and spindle servo. Also this IC has adjustment
free function and embeded opamp for audio post filter.

FEATURES

• RF amplifier & RF equalizer

• Focus error amplifier & servo control

• Tracking error amplifier & servo control

• Mirror & Defect detector circuit

• Focus OK detrector circuit

• APC(Auto Laser Power Control) circuit for constant laser power

• FE bias & focus servo offset adjustment free

• EF balance & tracking error gain adjustment free

• Embeded audio post filter

• The circuit for Interruption countermeasure

• Double speed play available

• Operating voitage range 3.4V~5.5V

PIN CONFIGURATION

#1

ORDERING INFORMATION

APPLICATIONS

• CD PLAYER

• Video-CD

RELATED PRODUCT

• KS9286 Data Processor

• KS9284 Data Processor

• KS9258D/KA9259D Motor Driver

Device Package Tempe. Range

KB9223 80-QFP-1420C -20~+70˚C

80-QFP-1420C

51

52

53

54

55

56

57

58

59

60

61

62

63

64

TE2

65

PD1

66

PD2

67

F

68

E

69

PD

70

LD

71

VR

72

AVCC

73

RF-

74

RFO

75

IRF

76

ARF

77

RF1

78

CAGC

79

EI

80

AVEE

1

DVEE

MCP

2

TG2

FEBIAS

FRSH

DCB

3

4

TGU

DCC2

5

FE1

FDFCT

FSET

DCC1

6

AVCC

7

TDFET

VCCP

8

9

FE2

TE1

LPFT

DVCC

KB9223

CH21

GC20

GC21

12

11

10

CH20

13

TZC

CH10

14

43

44

45

46

47

48

49

50

ATSC

CH1I

15

TEO

CH10

16

TE-

CH1I

17

FEO

RRC

18

FE-

VSSP

19

SPDL-

SPDLD

ISET

MUTEI

20

21

SL-

VREG

22

SLO

WDCH

42

SL+

SMDP

23

41

SSTOP

SMON

24

FOK

MIRROR

RESET

MLT

MDATA

MCK

AVEE

EFM

ASY

ISTAT

TRCNT

LOCK

FGD

FS3

FLB

SMEF

40

39

38

37

36

35

34

33

32

31

30

29

28

27

26

25

- 30 -

Pin No.

Symbol Description

1 MCP Capacitor connection pin for mirror hold

2 DCB Capacitor connection pin for defect Bottom hold

3 FRSH Capacitor connection pin for time constant to generate focus search waveform

4 DCC2 The input pin through capacitor of defect bottom hold output

5 DCC1 The output pin of defect bottom hold

6 FSET The peak frequency setting pin for focus, tracking servo and cut off frequency of CLV LPF

7 VDDA Analog ACC for servo part

8 VCCP VCC for post filter

9 GC2I Amplifier negative input pin for gain and low pass filtering of DAC output CH2

10 GC2O Amplifier output pin for gain and low pass filtering of DAC output CH2

11 CH2I The input pin for post filter channel2

12 CH2O The output pin for post filter channel2

13 CH1O The output pin for post filter channel1

14 CH1I The input pin for post filter channel1

15 GC1O Amplifier output pin for gain and low pass filtering of DAC output CH1

16 GC1I Amplifier negative input pin for gain and low pass filtering of DAC output CH1

17 RRC The pin for noise reduction of post filter bias

18 VSSP VSS for post filter

19 MUTEI The input pin for post filter muting control

20 ISET The input pin for current setting of focus search, track jump and sled okick voltage

21 VREG The output pin of regulator

22 WDCK The clock input pin for auto sequence

23 SMDP The input pin of CLV control output pin SMDP of DSP

24 SMON The input pin for spindle servo ON through SMON of DSP

25 SMEF The input pin of provide for an external LPF time constant

26 FLB Capacitor connection pin to perform rising low bandwidth of focus loop

27 FS3 The pin for high freqency gain change of focus loop with internal FS3 switch

28 FGD Reducing high freqency gain with capacitor between FS3 pin

29 LOCK Sled runaway prevention pin

30 TRCNT Track count output pin

31 ISTAT Internal status output pin

32 ASY The input pin for asymmetry control

33 EFM EFM comparator output pin

34 VSSA Analog VSS for servo part

35 MCK Micom clock input pin

PIN DESCRIPTION

- 31 -

Pin No.

Symbol Description

36 MDATA Micom data input pin

37 MLT Micom data latch input pin

38 RESET Reset input pin

39 MIRROR The mirror output for test

40 FOK The output pin of focus OK comparator

41 SSTOP The pin for detection whether pick_up position is innermost or ton

42 SL+ The noninverting input pin of sled servo amplifier

43 SLO The output pin of sled servo amplifier

44 SL- The inverting input pin of sled servo amplifier

45 SPDL- The noninverting input pin of spindle servo amplifier

46 SPDLO The output pin of spindle servo amplifier

47 FE- The inverting input pin of focus servo amplifier

48 FEO The output pin of focus servo amplifier

49 TE- The inverting input pin of tracking servo amplifier

50 TEO The output pin of tracking servo amplifier

51 ATSC The input pin for Anti-shock detection

52 TZC The comaparator input pin for tracking zero crossing detection

53 TE2 Tracking servo input pin

54 TE1 Tracking error amplifier output pin

55 LPFT The input pin of tracking error low pass filtering signal

56 DVDD The power supply pin for logic circuit

57 TDFCT The capacitor connection pin for tracking defect compensation

58 FE2 Focus servo input pin

59 FE1 Focus error amplifier output pin

60 FDFCT The capacitor connection pin for focus defect compensation

61 TGU The capacitor connection pin for high frequency tracking gain switch

62 TG2 The pin for high frequency gain change of tracking servo loop with internal TG2 switch

63 FEBIAS Focus error bias voltage control pin

64 DVEE The DVEE pin for logic circuit

65 PD1 The negative input pin of RF I/V amplifier1 (A+C signal)

66 PD2 The negative input pin of RF I/V amplifier2 (B+D signal)

67 F The negative input pin of F I/V amplifier1 (F signal

68 E The negative input pin of E I/V amplifier1 (E signal)

69 PD The input pin for APC

70 LD The output pin for APC

PIN DESCRIPTION (Continued)

- 32 -

BLOCK DIAGRAM

MICOM TO SERVO CONTROL

AUTO SEQUENCER

FOK DETECTION
CIRCUIT

MIRROR DETECTION
CIRCUIT

Spindle Servo LPF
(Double Speed)

Sled Servo Amplifier
& Sled Kick GEN.

Tracking Phase
Compensation Block
& Jump Pulse GEN.

Focus Phase
Compensation
& Offset cancel circuit

Micom Data

Interface Logic

RF Amp

73

74

65

66

63

67

68

79

69

70

71

78

76

75

32

33

77

2

4

RF-

RFO

PD1

PD2

F

E

EI

PD

LD

VR

ARF

IRF

ASY

EFM

RFI

DCB

DCC1

GC1O

MLT

TZC

FE2

FLB

FGD

FS3

TE1

FE1

GC1I

CH1O

CH1I

MUTEI

RRC

CH2O

CH2I

GC2I

GC2O

5

15 16 13 14 19 17 12 11 9 10

40

1

39

6

25

24

23

45

46

42

44

43

61

62

55

53

50

49

57

48

47

60

FOK

MCP

MIRROR

FSET

SMEF

SMON

FS1 to
FS4

TM1 to
TM6

BAL1 to
BAL5

PS1 to
PS4

GA1 to
GA5

SMDP

SPDL-

SPDLO

SL+

SL-

SLO

TGU

TG2

LPFT

TE2

TEO

TE-

TDFCT

FEO

FE-

FDFCT

327282658525135363738312930225459

APC Amp

Center Voltage Amp.

Focus Error Amp
FE-BIAS Adjustment

Tracking Error Amp
E/F Balance & Gain
Control

RF Level AGC
&
Equalizer

EFM
Comparator

Defect Detection
CircuitT

ADJUSTMENT-FREE CONTROL

Built-in Post Filter Amp(L&R)

LDON

Pin No.

Symbol Description

71 VR The output pin of (AVEE+AVCC)/2 voltage

72 VCC VCC for RF part

73 RF- RF summing amplifier inverting input pin

74 RFO RF summing amplifier output pin

75 IRF The input pin for AGC

76 ARF The output pin for AGC

77 RFI The input pin for EFM comparating

78 CAGC The capacitor connection pin for AGC

79 EI Feedback input pin of E I/V amplifier for EF Balance control

80 GND GND for part

PIN DESCRIPTION (Continued)

- 33 -

■ LA1837

- 34 -

■ KB9286

DIGITAL SIGNAL PROCESSOR

The KS9286 is a CMOS integrated circuit designed for the Digital
Audio Signal Processor for Compact Disc Player. It is a monolithic
IC that builts-in 16 bit Digital Analog Convertor, ESP interface and
Digital De-emphasis additional conventional DSP function.

FEATURES

• EFM data demodulation

• Frame sync datection/protection/insertion

• Powerful error correction (C1 : 2error, C2 : 4erasure)

• Interpolation

• 8fs digital filter (51th+13th+9th)

• Subcode data serial output

• CLV servo controller

• Micom interface

• Digital audio output

• Digital de-emphasis

• ESP interface

• Built-in 16K SRAM

• Built-in Digital PLL

• Double speed play available

• Built-in 16 bit D/A converter

• VDD = 3.4 ~ 5.5V

PIN CONFIGURATION

DB6

40

DB7

39

DB8

38

MCK

37

MDAT

36

MLT

35

MUTE

34

DVDD1

33

SDAT

32

SBCK

31

SQOK

30

SQDT

29

SQCK

28

/ESP

27

S0S1

26

LKFS

25

SMEF

65

TEST1

66

EFMI

67

ADATAI

68

/ISTAT

69

TRCNT

70

LOCK

71

PBFR

72

SMEF

73

SMON

74

DVDD2

75

SMDP

76

SMSD

77

BCKI

78

TESTV

79

DSPEED

80

LRCHI

41

DB5

42

DB4

43

DB3

44

DB2

45

DB1

46

C1F1

47

C1F2

48

C2F1

49

C2F2

50

C2FL

51

/PBCK

52

DVSS2

53

FSDW

54

ULKFS

55

/JIT

56

C4M

57

C16M

58

/WE

59

/CS

60

XTALSEL

61

TEST0

62

CDROM

63

SRAM

64

EMPH

24

VREFH2

23

VREFH1

22

AVSS2

21

LCHOUT

20

RCHOUT.

19

AVDD2

18

VREFL2

17

VREFL2

16

C2PO

15

BCKO

14

DVSS1

13

ADATAO

12

LRCHO

11

WDCHO

10

XOUT

9

XIN

8

DATX

7

AVSS1

6

CNTVOL

5

DPFOUT

4

DPFIN

3

DPDO

2

AVDD1

1

KS9286

ORDERING INFORMATION

#1

Device Package Tempe. Range

KB9286 80-QFP-1420C -20~+75˚C

80-QFP-1420C

- 35 -

PIN NO

SYMBOL IO DESCRIPTION

1 AVDD1 - Analog VCC1

2 DPDO O Charge pump output for Digital PLL

3 DPFIN I Filter input for Digital PLL

4 DPFOUT O Filter output for Digital PLL

5 CNTVOL I VCO control voltage for Digital PLL

6 AVSS1 - Analog Ground1

7 DATX O Digital Audio output data

8 XIN I X’tal oscillator input

9 XOUT O X’tal oscillator output

10 WDCHO O Word clock output of 48 bit/Slot (88.2KHz)

11 LRCHO O Channel clock output of 48 bit/Slot (44.1KHz), 88.2KHz when ESP ON

12 ADATAO O Serial audio data output of 48 bit/Slot(MSB first), double speed output when ESP ON

13 DVSS1 - Digital Ground1

14 BCKO O Audio data bit clock output of 48 bit/Slot (2.1168MHz), 4.2336MHz when ESP ON

15 C2PO O C2 Pointer for output audio data

16 VREFL2 I Input terminal2 of reference voltage “L” (Floating)

17 VREFL1 I Input terminal1 of reference voltage “L” (GND connection)

18 AVDD2 - Analog VCC2

19 RCHOUT O Right-Channel audio output through D/A converter

20 LCHOUT O Left-Channel audio output through D/A converter

21 AVSS2 - Analog ground2

22 VREFH1 I Input terminal1 of reference voltage “H” (VDD connection)

23 VREFH2 I Input terminal2 of reference voltage “H” (Floating)

24 EMPH O Emphasis/Non-Emphasis output, H:Emphasis ON, L:Emphasis OFF

25 LKFS O The Lock Status output of frame sync

26 S0S1 O Output of subcode sync signal (S0+S1)

27 RESET I System reset at “L”

28 /ESP I ESP function ON/OFF control (“L”:ESP function ON, “H”:ESP function OFF)

29 SQCK I Clock for output Subcode-Q data

30 SQDT O Serial output of Subcode-Q data

31 SQOK O The CRC (Cycle Redundancy Check) check result signal output of Subcode-Q

32 SBCK I Clock for output subcode data

33 SDAT O Subcode serial data output

34 DVDD1 - Digital VDD1

35 MUTE I Mute control input (“H”: Mute ON)

PIN DESCRIPTION

- 36 -

PIN NO

SYMBOL IO DESCRIPTION

36 MLT I Latch Signal Input from Micom (Schmit Trigger)

37 MDAT I Serial data input from Micom (Schmit Trigger)

38 MCK I Serial clock input from Micom (Schmit Trigger)

39 DB8 I/O SRAM data I/O port 8 (MSB)

40 DB7 I/O SRAM data I/O port 7

41 DB6 I/O SRAM data I/O port 6

42 DB5 I/O SRAM data I/O port 5

43 DB4 I/O SRAM data I/O port 4

44 DB3 I/O SRAM data I/O port 3

45 DB2 I/O SRAM data I/O port 2

46 DB1 I/O SRAM data I/O port 1 (LSB)

47 C1F1 I/O Monitoring output for C1 error correction (RA1)

48 C1F2 I/O Monitoring output for C1 error correction (RA2)

49 C2F1 I/O Monitoring output for C2 error correction (RA3)

50 C2F2 I/O Monitoring output for C2 error correction (RA4)

51 C2FL1 I/O C2 decoder flag (RA5, “H”:When the processing C2 code is impossible correction

status.)

52 /PBCK I/O Output of VCO/2 (4.3218MHz) (RA6)

53 DVSS2 I/O Digital ground 2

54 FSDW I/O Window or unprotected frame sync (RA7)

55 ULKFS I/O Frame sync protection state (RA8)

56 /JIT I/O Display of either RAM overflow or underflow for ±4 frame jitter margin (RA9)

57 C4M I/O Only monitoring signal (4.2336MHz) (RA10)

58 C16M I/O 16.9344MHz signal output (RA11)

59 /WE I/O Terminal for test

60 /CS I/O Terminal for test

61 XTALSEL I Mode Selection 1 (H: 33.8688MHz, L: 16.9344MHz)

62 TEST0 I TEST input terminal (GND connection)

63 CDROM I Mode Selection2 (H: CDROM, L: CDP)

64 SRAM I TEST input terminal (GND connection)

65 TEST1 I TEST input terminal (GND connection)

66 EFMI I EFM signal input

67 ADATAI I Serial audio data input of 48 bit/Slot (MSB first)

68 /ISTAT O The internal status output

69 TRCNT I Tracking counter input signal

PIN DESCRIPTION (continued)

- 37 -

PIN NO

SYMBOL IO DESCRIPTION

70 LOCK O Output signal of LKFS condition sampled PBFR/16 (if LKFS is “H”, LOCK is “H”, if

LKFS is sampled “L” at least 8 times by PBFR/16, LOCK is “L”.)

71 PBFR O Write frame clock (Lock: 7.35KHz)

72 SMEF O LPF time constant control of the spindle servo error signal

73 SMON O ON/OFF control signal for spindle servo

74 DVDD2 - Digital VDD2

75 SMDP O Spindle Motor drive (Rough control in the SPEED mode, Phase control in the PHASE

mode)

76 SMSD O Spindle Motor drive (Velocity control in the PHASE mode)

77 BCKI I Audio data bit clock input of 48 bit/Slot (2.1168MHz)

78 TESTV I TEST input terminal (GND connection)

79 DSPEED I TEST input terminal (VDD connection)

80 LRCHI I Channel clock input of 48 bit/Slot (44.1KHz)

PIN DESCRIPTION (continued)

BLOCK DIAGRAM

SUBCODE
SYNC
DETECTOR

SUBCODE
OUTPUT

EFM
DEMODULATOR

8BIT DATA BUS

ADDRESS
GENERATOR

EFM
PHASE
DETECTOR

DIGITAL
PLL

DIGITAL
CLV
SERVO

CPU
INTERFACE

MODE
SELECTOR

DIGITAL
OUTPUT

D/A
CONVERTER

DIGITAL
FILTER
& DE-EMPH

INTERPOLATOR

ECC

16K
SRAM

TRACK
COUNTER

23BIT
SHIFT
REGISTER

FRAME SYNC
DETECTOR
PROTECTOR
INSERTOR

X-TAL
TIMING
GENERATOR

SUBCODE-Q
REGISTER

SQDT

30

29

11

66

5

3

4

2

72

73
75

76
70

9

8

37

38

36

616263

65

7

19

20

33

32

26

69
68

12
14

77
67
60
24

17

22

SDAT

SBCK

S0S1

LRCHO
ADATAO
BCKO

BCKI
ADATAI
LRCHI
EMPH

VREFL1

VREFH1

EFMI

CNTVOL

DPFIN

DPFOUT

DPDO

SMEF

SMON

SMDP
SMSD

LOCK

XOUT

LCHOUT

RCHOUT

DATX

TEST1

TEST0

XTALSEL

CDROM

XIN

MDAT

MCK

MLT

TRCNT

/ISTAT

SQCK

BLOCK DIAGRAM

- 19 -

SCHEMATIC DIAGRAMS

• FRONT & KEY CIRCUIT

- 20 -

NOTES : 1. Resistance values are indicted in ohms unless otherwise specified (K=1,000, M=1,000,000).

2. Capacitance values are shown in microfarads unless otherwise (P=MICRO-MICRO FARADS).

3. Schematic diagram for this model are subject to change for improvement without prior notice.

• TUNER CIRCUIT

- 22 -

NOTES : 1. Resistance values are indicted in ohms unless otherwise specified (K=1,000, M=1,000,000).

2. Capacitance values are shown in microfarads unless otherwise (P=MICRO-MICRO FARADS).

3. Schematic diagram for this model are subject to change for improvement without prior notice.

• CDP CIRCUIT

NOTES : 1. Resistance values are indicted in ohms unless otherwise specified (K=1,000, M=1,000,000).

2. Capacitance values are shown in microfarads unless otherwise (P=MICRO-MICRO FARADS).

3. Schematic diagram for this model are subject to change for improvement without prior notice.

- 23 -

PCB LAYOUTS

• MAIN P.C BOARD

- 25 -

• CDP P.C BOARD

28 27

26 25 24 23 22

T S D

REGULATOR

MUTE

LEVEL

SHIFT

LEVEL

SHIFT

100K

50K

50K

10K

10K

10K 10K

10K

BUY

BUY

BUY

LEVEL

SHIFT

LEVEL

SHIFT

1234567

8 9 10 11 12 13 14

21 20 19 18 17 16 15

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

RR

16

R

20

R

19

R

14

R

10

R

7

R

AMP 1

IN1

REGULATED
VOLTAGE
CIRCUIT

Vcc

OUT1

OUT2

GND

IN2

8

5

1

2

3

4

6

7

AMP 2

INTERNAL BLOCK DIAGRAM OF ICs

■ KA3010D

■ KIA7805 P/PI ~ KIA7824P/PI ■ KIA6225S

- 26 - - 27 -

A26

181

181

G018

458

303

351

305

459

459

G034

284

286

285

290

264

A47

454

454

454

301

302

454

418

282

450

261

262

266

353

263

A43

A46

454

454

267

250

260

284

454

454

454

265

287

278

279

A00

258

285

EXPLODED VIEW/PARTS LIST

• CABINET

- 38 -

• TAPE DECK MECHANISM: AUTO STOP DECK

04

07

011

018

014

022

026

028

036

038

038

032

01

- 39 - - 40 -

WIRING DIAGRAM

- 24 -

• AMP & DECK CIRCUIT

NOTE: Warning

Parts that are shaded are critical With respect
to risk of fire or electrical shock.

NOTE:

1. Shaded(■) parts are critical for safety.Replace only

with specified part number.

2. Voltages are DC-measured with a digital voltmefer
during Play mode.

- 21 -

NOTES : 1. Resistance values are indicted in ohms unless otherwise specified (K=1,000, M=1,000,000).

2. Capacitance values are shown in microfarads unless otherwise (P=MICRO-MICRO FARADS).

3. Schematic diagram for this model are subject to change for improvement without prior notice.

- 53 -

SPEAKER SYSTEM

MODEL: FE-175E

SPECIFICATION

•

TYPE : BASS REFLEX 1 WAY 1 SPEAKER SYSTEM

•

SPEAKER SYSTEM :

WOOTER 100mm(4

”)

• FREQUENCY RESPONSE : 90Hz~20.000Hz

• IMPEDANCE : 4Ω

• S.P.L. : 86dB/W(1m)

• RATED INPUT POWER : 5W

• MAX. INPUT POWER : 10W

• DIMENSION NET : 148(W) x 240(H) x 183(D)mm

• WEIGHT NET : 1.52kg

SCHEMATIC DIAGRAM

IN

WF

- 54 -

EXPLODED VIEW/PARTS LIST