LG FFH-818 Schematic

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Page 1

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

Page 2

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)

Page 3

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).

Page 4

- 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

Rec IN Ch1

ALC

Rec Out Ch2

180kΩ

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

Ch2/A

Ch1/A

Ch1/B

Gvo

Vcc

Ch1

Ch2

Gvc

Ch2

ALC

GND

Rec

161718192122

Vref1

Vref

Vref2

A/B

Metal Out

Pre Out

REC Out

Rec Out Ch1

Mix Out

GND1 M/N

6.8kΩ

1000pF

6.8kΩ

9.1kΩ

10 9876435

M/N

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

123456789

KA3082

KIA6289N

- 30 -

INTERNAL BLOCK DIAGRAM OF ICs

LA1837

Page 5

- 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

INPUT

OUTPUT

GND

1

R R

Page 6

- 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

21 22

24 25

LOUT

SCL SDA

DIG_GND

ROUT

AGND

14 15

10 11 19 12 13 23

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

REF

SPKR ATT

RIGHT

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

L-IN2

L-IN3

L-IN4

R-IN1

R-IN2

R-IN3

R-IN4

Page 7

- 33 -

STK411-220E

Page 8

- 34 -

MSGEQ7

Audio

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

AIN

AOUT

IFIN

XOUT

FMIN

AMIN

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

RESET

CCB

I/F

Page 9

- 35 -

KA3010

PIN DESCRIPTION

28 27

26 25 24 23 22

T S D

REGULATOR

MUTE

LEVEL

SHIFT

LEVEL

SHIFT

100K

50K

10K

10K 10K

10K

BUY

LEVEL

SHIFT

LEVEL

SHIFT

1 2 3 4 5 6 7

8 9 10 11 12 13 14

21 20 19 18 17 16 15

Pin No. Symbol I/O Description

1 DO1.1 O DRIVE OUTPUT

2 DO1.2 O DRIVE OUTPUT

3 DI1.1 I DRIVE INPUT

4 DI1.2 I DRIVE INPUT

5 REG REGULATOR

6 REO O REGULATOR OUTPUT

7 MUTE MUTE

8 GND1 GROUND

9 DI2.1 I DRIVE INPUT

10 DI2.2 I DRIVE INPUT

11 DO2.1 O DRIVE OUTPUT

12 DO2.2 O DRIVE OUTPUT

13 GND2 GROUND

14 OPOUT O OPAMP OUTPUT

15 OPIN (-) I OPAMP OUTPUT (-)

16 OPIN (+) I OPAMP INPUT (+)

17 DO3.1 O DRIVE OUTPUT

18 DO3.2 O DRIVE OUTPUT

19 DI3.1 I DRIVE INPUT

20 DI3.2 I DRIVE INPUT

21 VCC1 SUPPLY VOLTAGE

22 VCC2 SUPPLY VOLTAGE

23 VREF 2.5V BIAS VOLTAGE

24 DI4.1 I DRIVE INPUT

25 DI4.2 I DRIVE INPUT

26 DO4.1 O DRIVE OUTPUT

27 DO4.2 O DRIVE OUTPUT

28 GND3 GROUND

Page 10

- 36 -

KB9223

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

RF-

RFO

PD1

PD2

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

15 16 13 14 19 17 12 11 9 10

FOK

MCP

MIRROR

FSET

SMEF

SMON

FS1 to FS4

TM1 to TM6

BAL1 to BAL5

PS1 to PS4

GA1 to GA5

SMPD

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 DESCRIPTION

Pin No. System 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 VCC 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 channl1 14 CH1I The input pin for post filter channel1 15 GC1O Amplifier output pin for gain and low pass filtering of DAC output CH1

Page 11

- 37 -

Pin No. System Description

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 kick 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 frequency 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 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 not 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 amplifier (F signal) 68 E The negative input pin of E I/V amplifier (E signal) 69 PD The input pin for APC 70 LD The output pin for APC 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 RF part

Page 12

- 38 -

KS9286

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

73 75

76 70

616263

69 68

12 14

77 67 60 24

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

PIN DESCRIPTION

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 48bit/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)

Page 13

- 39 -

Pin No. Symbol IO Description

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) 36 MLT I Latch Signal Input from Micom (Scmit Trigger) 37 MDAT I Signal data input from Micom (Scmit Trigger) 38 MCK I Signal clock Input from Micom (Scmit 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 C2FL I/O C2 decoder flag (RA5, H : When one 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 onncerflow for ±4 frame jitter margin (RA9) 57 C4M I/O Only monitoring signal (4.2336M .. 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 Selection1 (H: 33.8688MHz, L: 16.9344MHz) 62 TEST0 I TEST input terminal (GND connection) 63 CDROM I Mode Selection2 (H: CD-ROM, 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

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)

Page 14

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)

Page 15

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 -

Page 16

- 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

Page 17

- 11 -

TROUBLESHOOTING

Turn power on.

Is power on?

Does initial read work?

Does it play?

Does it output audio?

Check power supply circuit.

(Check PN 807)

Check laser circuit.

Check focus circuit.

Check disc.

Check tracking servo circuit.

Check audio circuit.

YES

Page 18

1.3V

- 12 -

Fails to initial read

YES

NO NO NONO

Does laser light?

Disc motor turns.

Does RF waveform appear?

TP 801(RF)

Does tracking servo work? Lower envelope of TP801(RF) waveform is flat.

Does signal appear at TP801(TEO)?

Does signal appear at IC 803 Pin and Pin ?

Does GFS (IC802 pin ) show as below?

Is rotation normal?

Is there no dropout of RF signal?

Does TE2 signal appear at pin of IC801?

Defective IC 801, pick up and/or open wire.

Detective pattern.

Defective IC 801 and/or IC 803

Defective pick-up and/or connector.

Defective IC 801.

Scratch in disc initial read area.

Defective pick-up adjustment focus offset.

Page 19

A

- 13 -

Laser does not light.

Is Ò3.5VÓ applied to pin of IC 801?

Is power supplied to laser Q801?

(Q 801 collector: about 1.8V)

Does laser current flow?

1.0V across R801

Is data transferred from MICOM IC ?

Does voltage appear at IC 803 pin , ?

Defective MICOM.

Defective connector.

Defective IC 801, 803

Defective slide motor and/or connector.

Defective LMT SW and/or connector.

Defective Q 801 and/or laser.

Defective laser and/or connector.

Did pickup return to

innermost circular?

Does it stop at inner pick circular after shift?

Is defect output from LM SW applied to pin of

PN803?

R801 1.0V

YES

OPEN

YES

Page 20

- 14 -

Does lens move up/down?

Does IC 801 out focus search signal?

IC 801 pin (FEO)

Is focus search signal applied to pin , of CN801?

Laser lights.

Confirm

initial

read with

disc

Defective IC801

Defective IC803

Defective IC 801.

Open activator and/or connector.

Open connector and/or defective IC 801.

Incorrect turntable height. Degraded laser diode.

Does TP 801 RF signal appear even in low level?

Is laser output adjustment correct?

Does FOK(focus ok) signal appear?

YES

TP801 (RF)

IC801 pin (FOK)

Page 21

FER

ISTAT(SENSE)

Start mode

- 15 -

Does FE1 signal appear? IC 801 pin

Does FZC signal (focus zero cross signal) appear at pin of IC 801, ISTAT (SENSE) terminal?

Does SMON signal appear at pin of IC 802?

Does SMPO signal appear at pin of IC 802?

Is drive voltage applied to disk motor?

Defective IC 801.

Open pick diode

Defective IC 801.

Defective Pattern between IC 801 and IC 802.

Defective IC 801, 803 and/or peripheral circuit.

Defective disk motor and/or insulation.

(Focus servo turns ON by FZC signal of FOK mod.)

YES

Page 22

- 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 SSPPEECC IIFFIICCAATT IIOONN VV CC

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

Page 23

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TAPE DECK MECHANISM:AUTO STOP DECK(OPTIONAL)

108

109

110

112

113

115

117

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

Page 24

- 43 -

TAPE DECK MECHANISM:AUTO REVERSE DECK(OPTIONAL)

89

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

Page 25

- 44 -

EXPLODED VIEW/PARTS LIST

CD MECHANISM

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

Page 26

- 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

Page 27

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