LG FFH 5670AD SCHEMATIC

- 1-1 -

CONTENTS

SECTION 1. GENERAL

• SERVICING PRECAUTIONS

....................................................................................................................

1-2

• ESD PRECAUTIONS

.................................................................................................................................

1-4

• SPECIFICATIONS

.....................................................................................................................................

1-5

SECTION 2. ELECTRICAL

• ADJUSTMENTS

.........................................................................................................................................

2-1

• TROUBLESHOOTING

...............................................................................................................................

2-3

• WAVEFORMS OF MAJOR CHECK POINT

..............................................................................................

2-7

• BLOCK DIAGRAM

...................................................................................................................................

2-17

• SCHEMATIC DIAGRAMS

........................................................................................................................

2-19

• WIRING DIAGRAM

..................................................................................................................................

2-29

• PRINTED CIRCUIT DIARGAMS

..............................................................................................................

2-31

• INTERNAL BLOCK DIAGRAM OF IC’s

...................................................................................................

2-38

• REPAIRS REGARDING CD MECHANISM

.............................................................................................

2-45

SECTION 3. EXPLODED VIEWS

• CABINET AND MAIN FRAME SECTION

.................................................................................................

3-1

• TAPE DECK MECHANISM: AUTO STOP DECK(OPTIONAL)

..................................................................

3-3

• TAPE DECK MECHANISM: AUTO REVERSE DECK

................................................................................

3-5

• CD MECHANISM

........................................................................................................................................

3-7

SECTION 4. SPEAKER

..................................................................................................................

4-1

SECTION 5. REPLACEMENT PARTS LIST

..................................................................................

5-1

SECTION 1. GENERAL

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.

- 1-2 -

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

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.

CLEARING MALFUNCTION

You can reset your unit to initial status if malfunction occur(button malfunction, display, etc.).

Using a pointed good conductor(such as driver), simply short the RESET jump wire on the inside of the
volume knob for more than 3 seconds.

If you reset your unit, you must reenter all its settings(stations, clock, timer)

NOTE: 1. To operate the RESET jump wire, pull the volume rotary knob and release it.

2. If you wish to operate the RESET jump wire, it is necessary to unplug the power cord.

- 1-3 -

Armband

Conductive
Sheet

Resistor
(1 Mohm)

Resistor
(1 Mohm)

VOLUME KNOB

UP

DOWN

VOLUME

RESET TACT SWITCH

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.

- 1-4 -

- 1-5 -

NOTE : Specification are subject to change without notice in the course of product improvement.

SPECIFICATIONS



- 1-6 -

MEMO

- 2-1 -

TAPE DECK ADJUSTMENT

1. AZIMUTH ADJUSTMENT

Figure 1. 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

SECTION 2. ELECTRICAL

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.

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

2. MOTOR SPEED ADJUSTMENT

Figure 2. 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

- 2-2 -

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

60kHz±5kHz (Auto stop)

WIRE(PN202) 85kHz±5kHz(Auto Reverse)

Figure 3. Record Bias Adjustment Connection Diagram

4. TUNER ADJUSTMENT

Figure 4. Tuner(S curve) Adjustment Connection Diagram

Unit

Signal Generator

GND

Electronic
OSCILLOSCOPE

FM Antenna
Terminal

Speaker

Item Test Point Adjustment Adjust for

DC Voltage Checker IC Pin 26, 28 L106 0V±50mV

(FM)

- 2-3 -

TROUBLESHOOTING

Turn power on.

Is power on?

Does initial read work?

Does it play?

Does it output audio?

Check power supply circuit.
PN807 PIN5, 6.2V
PN807 PIN7, 5V
IC803 PIN 2, 3.3V

Check the connector

PN801, PN802, PN809

Check the tracking servo circuit.

Check the PN807 PIN1, 3

OK

YES

YES

YES

YES

YES

YES

NO

NONO

Check the DISK turns

Check the Laser

Check the focus circuit

Check the TRAKING circuit

NO

NO

- 2-4 -

Fails to initial read

A

B

2V

5V

0V

5V

0V

1V

0V

1.2V

0V

0.8V

NO NO

NO

NO

NO

NO

NO

NO

NO

NO

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

Disc motor turns

Does RF waveform appear?

IC801 Pin3

Check the Data transmission from

PN809 pin11 to CD DSP

Check the Data transmission from

PN809 pin13 to MICOM

Check the change of SLDO

Voltage(IC801 pin23)

Check the change of SL +,

SL - Voltage

(IC802 pin 18, 19)

Check the Voltage change of PN 809

PIN20(OPEN, CLOSE)

Defective connector

PN809

Defective connector

PN809, Defective

MICOM

Defective connector

PN809, Defective

IC801

Defective IC801

Defective IC802

Defective contact PN802

Defective PICK-UP

Does laser light?

focus coil drive wareform.

TRACKING ERROR wareform

Is rotation normal?

Defective IC801

Defective PICK-UP

Is there no dropout of RF signal?

Does FA+ waveform appear at

IC802 pin13?

Does TE waveform appear at

801 pin 15?

- 2-5 -

NO

NO

NO

NO

NO

NO

Laser does not light.

Is “3.5V” 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 R808

Is data transferred from
MICOM IC ?

Does voltage appear at IC
802 pin 17, 18?

Defective MICOM.

Defective MICOM.

Defective connector.

Defective IC 801, 802

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 2 of
PN802?

R808»1.0V

R808«1.0V

YES

YES

YES

YES

OPEN

CLOSE

YES

YES

YES

YES

YES

YES

70

- 2-6 -

B

NO

NO

NO

NO

NO

YES

YES

YES

YES

Laser lights

Does lens move up/down?

Check the signal of

FOCUS SEARCH

(IC801 Pin 21)

Chekc the signal of PN802

pin 13, 14

Does FE signal appear?

(IC801 pin 13)

Does DRF signal appear? (IC 801 pin67)

Defective IC801

Defective IC802

Open activator and/or connector

Defective IC801

Degraded laser diode

Defective PICK-UP

- 2-7 -

(CH1)

(CH2)

1. HF signal (RF signal ) waveform

(IC801 pin 3) during normal play

2. EFM signal (IC801 pin 3)waveform
during Normal Play

3. Focus coil drive waveform(IC802 pin13)

• When focus search failed or there is no disc on the tray

• Focus coil drive waveform(FDO: IC801 pin21) and
DRF(IC801 pin67) when focus search is accomplished

4. Tracking coil drive waveform and TE during track
traverse
(1) When time division is 20mS/Div.1V/Div.

(2) When time division 1mS/Div, 1V/Div

(During forward track traverse)

(3) When time division is 0.5nS/div.

(During backward Track Traverse)

5. Feed motor drive waveform(IC 802 pin18)
During normal play

CH1 : FOCUS COIL DRIVE

SIGNAL 2V/Div.

CH2 : DRF

CH1 : TRACKING COIL DRIVE

SIGNAL 2V/Div. (IC802 pin27)

CH2 : TRACKING ERROR(TE: IC801 pin15)

1V/Div.

(

(

(

CH2 : TRACKING COIL DRIVE (IC802 pin27)

SIGNAL 2V/Div.

CH2 : TRACKING ERROR (TE: IC801 pin15)

1V/Div.

(

CH1 : TRACKING COIL DRIVE (IC802 pin27)

CH2 : TRACKING ERROR (TE: IC801 pin15)

(

0.5V/Div.
500nS/Div.

(

1S/Div.
1V/Div.

(

1mS/Div.
1V/Div.

(

0.5V/Div.
5µS/Div.

(

2S/Div.

0.5V/Div.

OV

OV

OV
(CH1)

(CH2)

(CH1)

(CH2)

(CH2)

OV

OV

OV

OV

OV

OV

OV

OV

OV

WAVEFORMS OF MAJOR CHECK POINT

- 2-8 -

VKK PART

Does DC - 33V appear at

PN303 Pin .

OK

Dose -33V appear at

ZD702(-)

Check the Q702

TURN ON

Replace the Q702

Refer to power circuit

END

Check the -33V(LOW)

of C704(-)

Replace the D703,

D704

YES

YES

NO

NO

P-SENS PART

Does +5V appear at ZD705?

Check the pattern of

IC301 Pin .

Check the waveform

of D711(+).

Check the ZD703 or replace

Replace the D711

YES

YES

NO

NO

26

21

- 2-9 -

Power Circuit

Muting circuit (MUTE)

Check the Fuse

Check the DC output

of C784(+), C790(-)

Check the DC Input of IC702

Check the DC

output of IC704

Check the DC 12V

Output of IC703

Check the 5V of IC704

pin 2(CD FUNCTION)

END

Dose “High” appear at

Q214, Q215, Q714, Q715

check the “LOW” Q214, Q215,

Q714, Q715 “C”

Refer to “IC202 Troubleshooting”

(ONLY Q214/Q215)

MUTE

Replace the Fuse

Check the AC Output of

CN704 pin3, 5

Check the AC Output of

CN704 PIN 7, 10

Replace the IC703

Replace the D730

Replace the

D731, D709, D710

Check the D712, D713, D714

Check the “High” of

D711(+)

Check the “High” of D714(+)

Check the “High” of Q716 “E”

(ONLY Q714/Q715)

Replace the TR

Refer the Q716

Refer to “IC301

Troubleshooting”

Replace the IC704

Replace the Transformer

Replace the Transformer

Check the Voltage of

IC301 PIN82

Refer to “IC203

Troubleshoot”

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

- 2-10 -

Audio abnormal

SPK Relay Troubleshooting

Check the output of

IC706 Pin 9, 10

Refer to “IC701

Troubleshooting”

Refer to “Muting

Troubleshooting”

Check the power circuit

Refer to “SPK Relay

troubleshooting”

Refer to “power circuit”

Check “High” of Q709 “B”

Refer to “IC203

Troubleshooting”

Replace the RELAY(RY702)

Replace the Q709

Check the input of

IC705 IC707

Check the Input of IC707,

pin24, 25/IC705 pin 1, 7

Check the RY702

END

Check the 12V of D723(+)

Check the “Low” of Q709 “C”

Check the output

END

YES

YES

YES

YES

YES

YES

YES

YES

NO

NO

NO

NO

NO

NO

NO

NO

- 2-11 -

FUNCTION MODE Audio abnormal

TAPE

Check the signal input of IC707 pin 28, 37

Refer to “IC202 Troubleshooting”

AUX

Chekc the signal input of IC707, pin 29, 36

Check the signal input of JK102

Check the signal input of IC707 pin 31, 34

Refer to “CD Troubleshooting”

Check the signal input of IC707 pin 30, 35

Refer to “IC102 Troubleshooting”

CD

Tuner

- 2-12 -

Refer to “IC301

Troubleshooting”

IC301 Troubleshooting

IC203, IC302 Troubleshooting

Check the power supplying IC301 Pin 17, 46, 90?

Refer to “Power Circuit Troubleshooting”

Check the P-SENS

Replace the X301

Check the RESET circuit

Refer to “Power Circuit Troubleshooting”

Check the Data of IC301 Pin 3, 4, 5

(CD ➞ TAPE FUNCTION)

Replace the

IC501/IC302

Check the pattern

of (IC301, IC203, IC302)

Check the 5v of IC301 pin26

Check the oscillation of X301

When power supplying to IC301 pin17.

(Low ➞ High)

Replace the IC301

Check the power supplying to IC203/IC302 pin 16

Check the CLK Data of IC203/IC302 pin 2, 3

Check the CONTROLL function

END

YES

YES

YES

YES

YES

YES

YES

NO

NO

NO

NO

NO

NO

NO

- 2-13 -

IC601 Troubleshooting

Refer to “Power circuit Troubleshooting”

Refer to “FUNC Troubleshooting”

Refer to “SPK Relay”

Check the FUNC CLOCK DATA of pin 21, 22

Check the power of pin 39

Check the signal input

Check the Signal output of pin25, 24

OK

YES

YES

YES

YES

NO

NO

NO

FM (TUN101)

Check the 12V input of TUN101 B+ 6

Check the “High” Voltage of TUN101 VT 5

Check the OSC waveform of TUN101 Pin 8

Refer to “IC102 Troubleshooting”

Check the 12V of Q102 “E”

Refer to “Power

Circuit Trouble-

shooting”

Check the “GND” of IC103 Pin 7

Refer to “IC103

Troubleshooting”

Replace the Q102

Replace the TUN101

Replace the TUN101

YES

YES

YES

YES

YES

NO

NO

- 2-14 -

IC102 Troubleshooting

Is power supplied to pin8

Check the waveform of Pin 20, 21

Check the output of Pin 16, 17

END

Refer to “Power Circuit

Troubleshooting”

Check the FM(TUN101) & AM(L107)

Replace the IC102

Replace the IC102

Check the “Low” of Pin 13

Refer to “IC103

Troubleshooting”

YES

YES

YES

YES

NO

NO

NO

NO

NO

IC103 Troubleshooting

Check the power supplying to pin 17

Check the oscillation of X104

Check the waveform of CE, DI, DO, CLK

Is the normal ?

END

Refer to “Power Circuit

Troubleshooting”

Replace the X104

Check the line or refer to “IC 301
Troubleshooting”

CE: Chip Enable

DI: Data Input(from u-com)

DO: Data Output(to u-com)

CLK: Tuner mode clock

Replace the IC103

YES

YES

YES

YES

NO

NO

NO

NO

- 2-15 -

AM•COIL Troubleshooting

Check the “High” of L107 Pin 2

Refer to “IC103 Troubleshooting”

Replace the L107

Check the oscillation of L107 Pin 13

Refer to “IC102 Troubleshooting”

YES

YES

NO

NO

Play

Check the VCC supplying to IC202 pin 18

Refer to “Power Circuit Troubleshooting”

Check the Deck Mecha

Replace the Deck

Mecha.

Replace the IC202

Check the signal output of IC202 pin 5, 20

Check the Muting Circuit

YES

YES

YES

NO

NO

NO

YES

YES

NO

Dubbing(“NORMAL or REC “//“HIGH”)

Q209, 212 “OFF”//“ON” : R273, 223

“LOW”//“HIGH

Q253, 203 “ON”//“OFF” : R225, 275

“High”//”Low”

Refer to “IC203 Troubleshooting”

Refer to “REC Troubleshooting”

- 2-16 -

REC (Q252, Q202 ON / R273, R223 High)

Check signal supplied to IC202 pin 11, 14?

Check the output of IC202 Pin9, 16

Check the IC201 pin6 : 12V and pin 4 : High

Check the power or Refer to “IC203

Troubleshooting”

Check the power

supplying to C236(+)

Check the 0.6V of Q208

“B”

Check the “Low” of

Q208 “C”

Replace the Q207

END

Check the Vcc power of IC202 Pin18

Check the oscillation of L203 pin 2, 3

Replace the DECK

Check the “Low” of Q210,

Q211 “B”

Replace the Q210, Q211

Refer to “IC203

Troubleshooting”

Refer to “Power Circuit

Troubleshooting”

Refer to “IC203

trouleshooting”

Replace the Q208

Replace the L203

YES

YES

YES

YES

YES

YES

YES

YES

YES

NO

NO

NO

NO

NO

NO

NO

NO

NO

- 2-37 -

• Power P.C. BOARD

- 2-38 -

• CD MAIN P.C. BOARD

- 2-39 -

INTERNAL BLOCK DIAGRAM OF ICs

■ FAN8039BD3

5-CH Motor Diver

Description

The FAN8039BD3 is a monolithic integrated circuit suitable for a 5-CH motor driver which drives the
tracking actuator, focus actuator, sled motor, tray motor, spindle motor of the DVDP/CAR-CD systems.

28

2627

25 24 23 22

1 32 4 5 6 7

211920 18

17

16 15

8109

11

12

13 14

DO1-

DO

1+

IN1

REGVCC

REB

REO

RESX

GND1

FWD

IN2

DO2+

DO2-

GND2

REV

DO5+

DO 5-

DO3-

DO 3

+

IN3

CTL

VCC1

VCC

VREF

PS

IN4

DO 4+

DO4

-

GND3

TSD

10K

10K

10K

10K

2.5V

Regulator

Level
Shift

Level
Shift

COMP

2

2

2 2

2 2

FIN

(GND)

FIN

(GND)

Level
Shift

Level
Shift

10K

10K

Level
Shift

2

2

PS

RESX

FUNCTION

H

H

H

L

L

H

L

L

All Active

Reg. Only Deactive

Reg. Only Active

All Deactive

Pin Definitions

NO Symbol Description NO Symbol Description

1DO1-CH1 Drive Output (-) 15 GND2 Power Ground1 (CH 2,3,5)

2DO1+CH1 Drive Output (+) 16 DO5+ CH5 Drive Output (+)

3IN1 CH1 Drive Input 17 DO5- CH5 Drive Output(-)

4REGVCC Regulator Supply Voltage 18 DO3- CH3 Drive Output(-)

5REB Regulator Output 19 DO3+ CH3 Drive Output (+)

6REO Regulator Feedback Input 20 IN3 CH3 Drive Input

7RESX Regulator Reset 21 VCC1 Supply Voltage1(CH2,CH3,CH5)

8GND1 Signal Ground 22 PS Power Save

9CTL CH5 Motor Speed Control 23 VREF Bias Voltage

10 FWD CH5 Forward Input 24 VCC Supply Voltage(CH1,CH4)

11 REV CH5 Reverse Input 25 IN4 CH4 Drive Input

12 IN2 CH2 Drive Input 26 DO4+ CH4 Drive Output (+)

13 DO2+ CH2 Drive Output (+) 27 DO4- CH4 Drive Output (-)

14 DO2- CH2 Drive Output (-) 28 GND3 Power Ground2 (CH 1,4)

- 2-40 -

■ KA78R33

Low Dropout Voltage Regulator

Description

The KA78R33 is a low-dropout voltage regulator suitable for various electronic equipments. It provides
constant voltage power source with TO-220 4 lead full mold package. Dropout voltage of KA78R33 is
below 0.5V in full rated current(1A). This regulator has various function such as peak current protection,
thermal shut down, overvoltage protection and output disable function.

Internal Block Diagram

THERMAL SHUTDOWN

BANDGAP REFERENCE

OVERVOLTAGE
PROTECTION

SOA PROTECTION

SHORTCIRCUIT
PROTECTION

1

4

3

2

Vin

Vdis

Vo

GND

HIGH / LOW

OUTPUT
ON / OFF

Q1

R1

R2

-

+

­+

1.4V

-

CIRCUIT

■ LC72131

AM/FM PLL Frequency Synthesizer

- 2-41 -

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

Block Diagram

■ LA1837

Single-Chip Home stereo IC with Electronic Tuning Support

The LA1837 is a single-chip AM/FM IF and MPX IC that supports electronic tuning and was developed for
use in home stereo systems. It is optimal for use in automatic station selection systems that use the SD and
IF counting techniques.

Block Diagram

FM SD

ADJ

3 rd 5 th

DECODER

ANTI-BIRDIE

FM

- 2-42 -

■ KIA 78R12 PI

4 TERMINAL LOW DROP VOLTAGE REGULATOR

The KIA78RXX Series are Low Drop Voltage Regulator suitable for various electronic equipments. It
provides constant voltage power source with TO-220 4 termainal lead full molded PKG. The Regulator has
multi function such as over current protection, overheat protection and ON/OFF control.

- 2-43 -

■ KIA7805AP/API

THREE TERMINAL POSITIVE VOLTAGE REGULATORS 5V, 6V, 8V, 9V, 10V, 12, 15V, 18V, 24V.

EQUIVALENT CIRCUIT

Block Diagram

- 2-44 -

■ BA3126N

2-channel head switch for radio cassette recorders

- 2-45 -

Control circuit

12-bit shift register

Latch

Output buffer

(open drain)

1Vss

2DATA

3CLOCK

4Q0

5Q1

6 Q2

7Q3

8Q4

16 VDD

15 Q11

14 Q10

13 Q9

12 Q8

11 Q7

10 Q6

9 Q5

Pin No.

Pin name Function

BU2090/F/FS BU2092/F BU2092/FV

111Vss GND

222DATA Serial data input

333CLOCK Data shift clock input

-44LCK Data latch clock input

455Q0parallel data output

566Q1parallel data output

677Q2parallel data output

788Q3parallel data output

899Q4parallel data output

91010Q5parallel data output

10 11 11 Q6 parallel data output

--12 N.C. Not connected

--13 N.C. Not connected

11 12 14 Q7 parallel data output

12 13 15 Q8 parallel data output

13 14 16 Q9 parallel data output

14 15 17 Q10 parallel data output

15 16 18 Q11 parallel data output

-1719OEOutput Enable

16 18 20 V

DD Power supply

PIN DESCRIPTION

■ BU2090F

12-bit, Serial IN, Parallel OUT driver

Block diagram

- 2-46 -

REPAIRS REGARDING CD MECHANISM

IMPROVED METHOD - WHEN THE TRAY GEARS WERE DISTORTED

1. How to open the tray.
In case of not suppling power push two hooks (H) of the base, and them open the tray.

2. How to improve the distorted gears.

(1) Do the hole "C" of the cam gear to face forward the pick-up so the pick-up is down like figure.

(2) Do the hole "B" of main gear to face forward pick-up, too.

(3) Set the last part of main gear to point "A".

(4) Push the tray to end.

- 4-1 -

SECTION 4. SPEAKER SECTION

MODEL: FE-5670E

851

852

862

853

861

861

854

855

856

857

858

861

LOCA.NO. PART NO DESCRIPTION SPECIFICATION REMARKS

851 3720RMF022A PANEL,FRONT FRONT FE-5670E SILVER
852 6400RMEB01A SPEAKER,TWEETER FE-876E 06N39EHC0339A EAW 6OHM
853 6400RCEY01A SPEAKER,FULLRANGE 6400RCEY01A EAW 500 OHM 100 W
854 6400SCEJ02K SPEAKER,WOOFER 16LA0EHC1348G EAW WOOFER 5670E
856 4766RM0019B FELT FE-886E BLACK DUCT
857 3091RMW033A CABINET ASSEMBLY FE-5670E CABINET(195MM, PB12T)
858 6871RU9244A PWB(PCB) ASSEMBLY,SUBSET(AUDIO FE-5670E NETWORK ASSY
861 353M050C SCREW BH 3.5X16 FBK
862 353M025F SCREW TAPTITE, 3X8 FZMY

RUN DATE : 14.AUGUST.2002

- 4-2 -

MEMO

2-17 2-18

BLOCK DIAGRAM

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.

SCHEMATIC DIAGRAMS

• MAIN SCHEMATIC DIAGRAM

2-19 2-20

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.

2-21 2-22

• FRONT SCHEMATIC DIAGRAM

2-23 2-24

• TUNER/DECK SCHEMATIC DIAGRAM

2-25 2-26

• CDP SCHEMATIC DIAGRAM

2-27 2-28

WIRING DIAGRAM

NOTE: Warning

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

2-29 2-30

PRINTED CIRCUIT DIAGRAMS

• MAIN P.C. BOARD (SOLDER SIDE)

2-31 2-32

• MAIN P.C. BOARD (COMPONENT SIDE)

2-33 2-34

• FRONT P.C. BOARD(COMPONENT SIDE)

2-35 2-36

• FRONT P.C. BOARD(SOLDER SIDE)

SECTION 3. EXPLODED VIEWS

• CABINET AND MAIN FRAME SECTION

351

301

305

A47

302

303

306

354

458

451

354

458

A41

294

291

292

454

285

A43

A00

272

287

286

276

278

277

275

264

295

296

297

262

260

289

250

271

273

274

293

265

284

(Option)

A46

FAN

257

A26

456

NOTE) Refer to “SECTION 5 REPLACEMENT

PARTS LIST” in order to look for the
part number of each part.

3-1 3-2

3-3 3-4

• TAPE DECK MECHANISM: AUTO STOP DECK(OPTIONAL)

400

011

503

401

401

009

010

501

502

013

406

409

408

407

032

031

030

029

028

401

027

026

014

015

403

504

024

025

023

405

A01

402

022

016

017

018

019

020

021

505

007

008

003

004

005

001

002

404

400

400

006

LOCA. NO PART NO. SPECIFICATION

A00 6730R-G007A CWL44FF25 TOKYO PIGEON L-DOUBL

A01 6768R-UP01A 50-093-4249 PIGEON UNIT PCB AS

001 6768R-BP01B 02-084-4202 PIGEON BELT / FELT C

002 6768R-BP01A 02-084-4204 PIGEON BELT / FELT C

003 6768R-AP01D 50-239-4027 PIGEON ARM CWL44

004 6768R-AP01E 50-239-4026 PIGEON ARM CWL44

005 6768R-SP01E 01-082-4599 PIGEON SPRING CWL4

006 6768R-QP01A 50-093-4316 PIGEON MOTOR(ASSY)

007 6768R-GP01A 50-093-4063 PIGEON GEAR CWL44

008 6768R-SP01F 01-082-4598 PIGEON SPRING CWL4

009 6768R-MP01C 50-219-4014 PIGEON MOLD CWL44

010 6768R-SP01C 01-082-4652 PIGEON SPRING CWL4

011 6768R-SP01A 01-081-4601 PIGEON SPRING CWL4

013 6768R-SP01B 01-082-4651 PIGEON SPRING CWL4

014 6768R-SP01G 01-082-4597 PIGEON SPRING CWL4

015 6768R-AP01A 50-268-3016 PIGEON ARM CWL44

016 6768R-GP01C 50-093-4069 PIGEON GEAR CWL44

017 6768R-AP01C 50-239-4072 PIGEON ARM CWL44

018 6768R-GP01D 50-222-4007 PIGEON GEAR CWL44

019 6768R-SP01H 01-081-4657 PIGEON SPRING CWL4

020 6768R-BP01C 02-083-4188 PIGEON BELT / FELT C

021 6768R-LP01A 50-223-4254 PIGEON PULLEY / FLYW

022 6768R-VP01A 50-093-4125 PIGEON SOLENOID CW

023 6768R-GP01B 50-221-3009 PIGEON GEAR CWL44

024 6768R-AP01B 50-139-4292 PIGEON ARM CWL44

025 6768R-JP01B 50-093-3361 PIGEON PULLEY / FLYW

026 6768R-SP01D 01-080-4609 PIGEON SPRING CWL4

027 6768R-MP01B 50-093-3036 PIGEON MOLD CWL44

028 6768R-RP01A 22-027-41054 PIGEON ROLLER CWL

029 6768R-MP01A 50-219-4033 PIGEON MOLD CWL44

030 6768R-HP01A TC881CB067B PIGEON HEAD CWL44

031 6768R-SP01J 01-081-4605 PIGEON SPRING CWL4

032 6768R-HP01B TC231F PIGEON HEAD CWL44

033 6768R-JP01A 50-093-3360 PIGEON PULLEY / FLYW

400 6768R-CP01A GSE10A2003 PIGEON SCREW CWL44

401 6768R-CP01B GSE20A2005 PIGEON SCREW CWL44

402 6768R-CP01C GSE10A2004 PIGEON SCREW CWL44

403 6768R-CP01D GSL10A1704 PIGEON SCREW CWL44

404 6768R-CP01E GSP10A2603 PIGEON SCREW CWL44

405 6768R-CP01F GSP11A2012 PIGEON SCREW CWL44

406 6768R-CP01G GSE20A2004 PIGEON SCREW CWL44

407 6768R-CP01H GSL20A2005 PIGEON SCREW CWL44

408 6768R-CP01J 03-300-4127 PIGEON SCREW CWL44

409 6768R-CP01K GSL20A2008 PIGEON SCREW CWL44

501 6768R-WP01A GWM19S035035 PIGEON WASHER CWL

502 6768R-WP01B GWM17S050035S PIGEON WASHER CW

503 6768R-WP01C GWM40X075010 PIGEON WASHER CWL

504 6768R-WP01D GWP21X045020 PIGEON WASHER CWL

505 6768R-WP01E GWP12X030040S PIGEON WASHER CW

3-5 3-6

• TAPE DECK MECHANISM: AUTO REVERSE DECK

400

011

503

401

401

009

010

501

502

507

508

013

406

409

410

036

032

038

034

035

039

029

040

031

028

027

026

014

015

403

504

024

025

023

405

A01

402

022

016

017

018

019

020

021

505

007

008

003

004

005

001

002

404

400

400

506

037

006

LOCA. NO PART NO. SPECIFICATION

A00 6730R-G007B CDM-H1323 CD CHAN
A01 6768R-UP01A 50-093-4249 PCB AS
001 6768R-BP01B 02-084-4202 BELT/FELT
002 6768R-BP01A 02-084-4204 BELT/FELT

003 6768R-AP01D 50-239-4027 CWL44
004 6768R-AP01E 50-239-4026 ARM
005 6768R-SP01E 01-082-4654 SPRING
006 6768R-QP01A 50-093-4316 MOTOR
007 6768R-GP01A 50-093-4063 GEAR
008 6768R-SP01F 01-082-4598 SPRING
009 6768R-MP01C 50-219-4014 MOLD
010 6768R-SP01C 01-082-4652 SPRING
011 6768R-SP01A 01-081-4601 SPRING
013 6768R-SP01B 01-082-4651 SPRING
014 6768R-SP01G 01-082-4597 SPRING
015 6768R-AP01A 50-268-3016 ARM
016 6768R-GP01C 50-093-4069 GEAR
017 6768R-AP01C 50-239-4072 ARM
018 6768R-GP01D 50-222-4007 GEAR

019 6768R-SP01H 01-081-4657 SPRING
020 6768R-BP01C 02-083-4188 BELT/FELT
021 6768R-LP01A 50-223-4254 PULLEY
022 6768R-VP01A 50-093-4125 SOLENOID
023 6768R-GP01B 50-221-3009 GEAR
024 6768R-AP01B 50-139-4292 ARM
025 6768R-JP01B 50-093-3361 PULLEY
026 6768R-SP01D 01-080-4609 SPRING
027 6768R-DP01A 50-259-3342 LEVER
028 6768R-RP01A 22-027-41054 ROLLER
029 6768R-MP01A 50-219-4033 MOLD
031 6768R-SP01L 01-080-4649 SPRING
032 6768R-EP01A 50-093-4070 HEAD AY
033 6768R-JP01A 50-093-3360 PULLEY
034 6768R-SP01K 01-082-4650 SPRING
035 6768R-PP01A 50-119-4046 PRESS
036 6768R-PP01B 50-160-4108 PRESS
037 6768R-JP01C 50-093-3315 PULLEY
038 6768R-MP01D 50-219-4034 MOLD
040 6768R-SP01M 01-080-4607 SPRING
400 6768R-CP01A GSE10A2003 SCREW
401 6768R-CP01B GSE20A2005 SCREW
402 6768R-CP01C GSE10A2004 SCREW
403 6768R-CP01D GSL10A1704 SCREW
404 6768R-CP01E GSP10A2603 SCREW
405 6768R-CP01F GSP11A2012 SCREW
406 6768R-CP01G GSE20A2004 SCREW
409 6768R-CP01L GSD10A2018 SCREW
410 6768R-CP01M 03-300-4056 SCREW
501 6768R-WP01A GWM19S035035 WASHER
502 6768R-WP01B GWM17S050035S WASHER
503 6768R-WP01C GWM40X075010 WASHER
504 6768R-WP01D GWP21X045020 WASHER
505 6768R-WP01E GWP12X030040S WASHER
506 6768R-WP01H GWP23X040020 WASHER
507 6768R-WP01F GWN21X040040 WASHER
508 6768R-WP01G GWM19X055035S WASHER

3-7 3-8

• CD MECHANISM

416

151

152

155

184

185

184

A35

421

A30

421

168

417

417

153

159

A26

169

154

158

157

156

418

416

419

165

162

166

420

167

177

176

164

163

175

170

171

174

416

173

172

417

LOCA.NO. PART NO DESCRIPTION SPECIFICATION

A26 4405RBE003F MECHANISM ASSEMBLY CDM-H133 LGEHZ 3 CD CHANGER (S

A30 3041RB0002C BASE ASSEMBLY PU(SPRING DAMPER)

A35 6717RCA001A PICK UP ASSY KSM-213VSCM SONY FRONT LOADING

151 3390SB0002A TRAY DISC (CDM-H1303)

152 4470SB0011A GEAR TRAY B (CDM-H1303)

153 4470SB0010A GEAR TRAY A (CDM-H1303)

154 4400SB0001B BELT TRAY(CDM-H1303)

155 4680SBP002A MOTOR(MECH) ASSY TRAY

156 6871SF21RAD PWB(PCB) ASSY 3CH M/D SENSOR PWB ASSY

157 4974SB0003A GUIDE WORM (CDM-H1303)

158 4371SB0002A SHAFT ASSY TRAY (CDM-H1303)

159 3390SB0001A TRAY LOADING (CDM-H1303)

162 4400SB0001A BELT MAIN(CDM-H1303)

163 4470SB0003A GEAR PULLEY (CDM-H1303)

164 4470SB0004A GEAR LOADING (CDM-H1303)

165 6871SB21RAD PWB(PCB) ASSY 3CH M/D U/D/O/C PWB ASSY

166 4470SB0006A GEAR PU DOWN (CDM-H1303)

167 4470SB0008A GEAR PU UP-B (CDM-H1303)

168 4471SB0001A GEAR ASSY GEAR CAM ASSY

169 4860SB0002A CLAMP CLAMP ASSY

170 4974SB0001A GUIDE CAM (CDM-H1303)

171 4970SBN002A SPRING CAM (CDM-H1303)

172 3040SB0002A BASE MAIN(CDM-H1303)

173 6871SD21RAD PWB(PCB) ASSY 3CH M/D CAM PWB ASSY

174 6871SC21RAD PWB(PCB) ASSY 3CH M/D OPEN PWB ASSY

175 4680SBP001A MOTOR(MECH) PULLEY ASSY (CDM-H1303)

176 4470SB0007A GEAR PU UP-A (CDM-H1303)

177 4470SB0005A GEAR MAIN (CDM-H1303)

184 4900RB0001A DAMPER RUBBER 3CD CHANGER

185 3040SB0003A BASE PU(CDM-H1303)

186 4970RB0001A SPRING COIL 3 CD CHANGER

187 4970RB0001B SPRING COIL 50 3CD CHANGER

416 88H-0004 CD MECHA PARTS 3X12X12FNM

417 88H-0002 CD MECHA PARTS 3X9X12FZMY

418 353-025BAAA SCREW #NAME?

419 88H-0003 CD MECHA PARTS 3X12X10FZMY

420 353S353F SCREW #NAME?

421 6756SBX001A CD MECHANISM PARTS SCREW 2.6X10X10XFZMY CDM-H813