Sharp QTCD-141-H, QTCD-161-H, QTCD-162-H Service manual

QT-CD141H/161H/162H

SERVICE MANUAL

No. S5932QTCD161H

QT-CD141H(SL)
QT-CD161H(S)
QT-CD162H(S)

Illustration: QT-CD162H

• In the interests of user-safety the set should be restored to its
original condition and only parts identical to those specified should
be used.

• Note for users in U.K.
Recording and playback of any material may require consent
which SHARP is unable to give. Please refer particularly to the
provisions of Copyright Act 1956, the Dramatic and Musical
Performers Protection Act 1956, the Performers Protection Acts
1963 and 1972 and to any subsequent statutory enactments and
orders.

CONTENTS

SAFETY PRECATION FOR SERVICE MANUAL.............................................................................................................. 2

IMPORTANT SERVICE NOTES (161H FOR U.K. ONLY) ................................................................................................ 3

SPECIFICATIONS ............................................................................................................................................................. 3

NAMES OF PARTS ........................................................................................................................................................... 4

REMOTE CONTROL ..........................................................................................................................................................4

DISASSEMBLY.................................................................................................................................................................. 5

REMOVING AND REINSTALLING THE MAIN PARTS..................................................................................................... 6

ADJUSTMENT ................................................................................................................................................................... 7

NOTES ON SCHEMATIC DIAGRAM .............................................................................................................................. 10

TYPES OF TRANSISTOR ............................................................................................................................................... 10

BLOCK DIAGRAM ........................................................................................................................................................... 11

SCHEMATIC DIAGRAM/WIRING SIDE OF P.W.BOARD............................................................................................... 14

VOLTAGE ........................................................................................................................................................................ 24

WAVEFORMS OF CD CIRCUIT...................................................................................................................................... 25

TROUBLESHOOTING (CD SECTION) ........................................................................................................................... 26

FUNCTION TABLE OF IC................................................................................................................................................ 30

PARTS GUIDE/EXPLODED VIEW
PACKING METHOD (161H FOR U.K. ONLY)

Page

DIFFERENCE BETWEEN QT-CD161H AND QT-CD141H AND QT-CD162H

SECTION

REMOTE CONTROL
SURROUND

SHARP CORPORATION

QT-CD161H

QT-CD141H

– 1 –

QT-CD162H

This document has been published to be used
for after sales service only.
The contents are subject to change without notice.

QT-CD141H/161H/162H

SAFETY PRECATION FOR

SERVICE MANUAL

Precaution to be taken when replacing and servicing the
Laser Pickup.

The ael (ACCESSIBLE EMMISSION LEVEL) of the laser
power output is less than class 1 but the laser component is
capable of emitting radiation exceeding the limit for class 1.
Therefore it is important that the following precautions are
observer during servicing to protect your eyes against exposure
to the laser beam.

(1) When the cabinet is removed, the power is turned on

without a compact disc in position and the pick-up is on the
outer edge the laser will light for several seconds to detect
a disc. Do not look into the pick-up lens.

(2) The laser power output of the pick-up unit and replacement

service parts are all factory pre-set before shipment.
Do not attempt to re-adjust the laser pick-up unit during

replacement or servicing.

(3) Under no circumstances stare into the pick-up lens at any

time.

(4) CAUTION-USE of controls or adjustments, or pereformance

of procedures other than those specified herein may result
in hazardous radiation exposure.

Laser Diode Properties

Material: GaAIAs
Wavelength: 780 nm
Emission Duration: continuous
Laser Output: max. 0.6 mW

(161H Except for U.K./141H/162H)

LASER KLASSE 1
LUOKAN 1 LASERLAITE
KLASS 1 LASERAPPARAT

(161H For U.K.)

CAUTION-INVISIBLE LASER RADIATION WHEN OPEN. DO NOT STARE INTO
BEAM OR VIEW DIRECTLY WITH OPTICAL INSTRUMENTS.

VARNING-OSYNLIG LASERSTRALNING NAR DENNA DEL AR OPPNAD. STIRRA
EJ IN I STRALEN OCH BETRAKTA EJ STRALEN MED OPTISKA INSTRUMENT.

ADVERSEL-USYNLIG LASERSTRALING VED ABNING. SE IKKE IND I
STRALEN-HELLER IKKE MED OPTISKE INSTRUMENTER.

VARO! AVATTAESSA OLET ALTTIINA NAKYMATON LASERSATEILYLLE.
ALA TUIJOTA SATEESEEN ALAKA KATSO SITA OPTISEN LAITTEEN LAPI.

VARNING-OSYNLIG LASERSTRALNING NAR DENNA DEL AR OPPNAD.
STIRRA EJ IN I STRALEN OCH BETRAKTA EJ STRALEN GENOM OPTISKT
INSTRUMENT.

ADVERSEL-USYNLIG LASERSTRALING NAR DEKSEL APNES. STIRR IKKE
INN I STRALEN ELLER SE DIREKTE MED OPTISKE INSTRUMENTER.

VAROITUS! LAITTEEN KéYTTéMINEN
MUULLA KUIN TéSSé
KéYTTôOHJEESSA MAINITULLA
TAVALLA SAATTAA ALTISTAA
KéYTTéJéN TURVALLISUUSLUOKAN 1
YLITTéVéLLE NéKYMéTTôMéLLE
LASERSéTEILYLLE.

– 2 –

VARNING - OM APPARATEN ANVéNDS
Pè ANNAT SéTT éN I DENNA
BRUKSANVISNING SPECIFICERAS. KAN
ANVéNDAREN UTSéTTAS FôR OSYNLIG
LASERSTRèLNING, SOM ôVERSKRIDER

QT-CD141H/161H/162H

FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER
TO THE OPERATION MANUAL.

Before returning the unit to the customer after completion of a repair or adjustment it is necessary for the following withstand voltage
test to be applied to ensure the unit is safe for the
Setting of Withstanding Voltage Tester and set.

Set name
Withstanding Voltage Tester
Test voltage

Set time
Set current (Cutoff current)

Unit
Judgment

OK: The “GOOD” lamp lights.
NG: The “NG” lamp lights and the buzzor sounds.

Set value

4,240 VPEAK
3,000 VRMS

6 secs
4 mA

customer to use.

AC

WITHSTANDING

VOLTAGE TESTER

OUT

SHORT-CIRCUT
AC POWER
SUPPLY CORD

PROBE

UNIT

CONNECT THE PROBE
TO GND OF BATTERY
SPRING

SPECIFICATIONS

IMPORTANT SERVICE NOTES (161H FOR U.K. ONLY)

General

Power source: AC 230 - 240V, 50 Hz

DC 12 V [ "D" size (UM/SUM-1,
R20 or HP-2) battery x 8]
DC 3 V ["AA" size (UM/SUM-3, R6
or HP-7) battery x 2 for tuner
memory]

Power consumption: 11 W
Output power: PMPO; 28 W (total)
(161H Except forU.K. MPO; 8.4 W (4.2 W + 4.2 W)
/141H/162H) (AC operation, DIN 45 324)

RMS; 4.6 W (2.3 W + 2.3 W)
(DC operation, DIN 45 324)

Output power: MPO; 8.4 W (4.2 W + 4.2 W)
(161H For U.K.) (AC operation 10% T.H.D.)

RMS; 4.6 W (2.3 W + 2.3 W)
(DC operation, 10 % T.H.D.)

Speakers: 10 cm (4") full-range speaker x 2
Output terminal: Headphones; 16-50 ohms

(recommended; 32 ohms)

Dimensions: Width; 480 mm (18-15/16")

Height; 153 mm (6-1/16")
Depth; 254 mm (10")

Weight: 3.2 kg (7.1 Ibs.) without batteries

Radio

Frequency range: FM; 87.5 - 108 MHz

AM; 526.5 - 1,606.5 kHz

Tape recorder

Frequency response: 50 - 14,000 Hz (Normal tape)
Signal/noise ratio: 50 dB
Wow and flitter: 0.3 % (DIN 45 511)
(161H Except for U.K./Australia/New Zealand/141H/162H)
Wow and flitter: 0.25 % (WRMS)
(161H For U.K./Australia/New Zealand)
Motor: DC 12 V electric governor
Bias system: AC bias
Erase system: Magnet erase

Compact disc player

Disc: Compact disc
Signal readout: Non-contact, 3-beam semi-

conductor laser pickup

Audio channels: 2
Quantization: 16-bit linear quantization
Filter: 4-tims oversampling digital filter
D/A converter: 1-bit D/A converter
Wow and flutter: Unmeasurable

(less than 0.001% W. peak)

Specifications for this model are subject to change without
prior notice.

– 3 –

QT-CD141H/161H/162H

1. (TAPE) Record Button

2. (TAPE) Play Button

3. (TAPE) Rewind Button

4. (TAPE) Fast Forward Button

5. (TAPE) Stop/Eject Button

6. (TAPE) Pause Button

7. Cassette Compartment

8. CD Compartment

9. CD Eject Button

10. (CD) Pause Button
(TUNER) Band Selector Button

11. Preset Memory Button

12. (CD) Stop Button
(TUNER) Tuning Down Button

13. (CD) Play/Repeat Button
(TUNER) Tuning Up Button

14. (CD) Track Up/Cue Button
(TUNER) Preset Up Button

15. (CD) Track Down/Review Button
(TUNER) Preset Down Button

16. Stand-by, On/Function Switch

17. Extra Bass Switch

18. Surround Switch (162H ONLY)

19. Volume Control

20. (CD) Play Indicator

21. (CD) Repeat Indicator

22. (CD) Pause Indicator

23. Memory Indicator

24. (TUNER) FM Stereo MOde Indicator

25. (TUNER) FM Stereo Indicator

26. Battery Compartment

27. FM Telescopic Rod Aerial

28. Headphone Socket

29. AC Power Input Socket

NAMES OF P ARTS

123

10

11
12

16 18 19

17

4

56

20 21

26 27

78

9

22

28

23

24

29

13
14

15

25

Remote control (161H/162H ONLY)

30. (CD) Track Down/Review Button
(TUNER) Preset Down Button

31. (CD) Pause Button
(TUNER) Band Selector Button

32. (CD) Play/Repeat Button
(TUNER) Tuning Up Button

33. (CD) Track Up/Cue Button
(TUNER) Preset Up Button

34. (CD) Stop Button
(TUNER) Tuning Down Button

REMOTE CONTROL (161H/162H ONLY)

Notes:

Replace the batteries if the operating distance is
reduced or if the operation becomes erratic.
Periodically clean the transmitter LED on the
remote control and the sensor on the main unit
with a soft cloth.
Exposing the sensor on the main unit to strong
light may interfere with operation. Change the
lighting or the direction of the unit.
Keep the remote control away from moisture,
excessive heat, shock, and vibrations.

30

31

Illustration: QT-CD162H

Remote Sensor

15

15

32
33

34

0.2 m - 6 m
(8" - 20')

Illustration: QT-CD162H

– 4 –

DISASSEMBLY

(B2)x2
ø3x10mm

(A2)x1

(B3)x1

Front Cabinet

Top Cabinet

(B1)x1

Main PWB

(B2)x1

ø3x10mm

Caution on Disassembly

Follow the below-mentioned notes when disassembling the
unit and reassembling it, to keep it safe and ensure excellent
performance:

1. Take cassette tape and compact disc out of the unit.

2. Be sure to remove the power supply plug from the wall
outlet before starting to disassemble the unit.

3. Take off nylon bands or wire holders where they need to
be removed when disassembling the unit. After servicing
the unit, be sure to rearrange the leads where they were
before disassembling.

4. Take sufficient care on static electricity of integrated
circuits and other circuits when servicing.

QT-CD141H/161H/162H

Front Cabinet

(A1)x6
ø3x20mm

STEP REMOVAL PROCEDURE FIGURE

1 Rear Cabinet 1. Screw .................(A1) x10 5-1

2. Socket .................. (A2) x1 5-2

2 Top Cabinet 1. Knob..................... (B1) x1 5-2

(with CD Mechanism/

Tape Mechanism/ 3. Socket .................. (B3) x1

Main PWB)

3 Main PWB/ 1. Screw ................... (C1) x9 5-3,6-1

Switch PWB/ 2. Socket .................. (C2) x4 5-3,6-1

Headphones PWB 3. Soldering.............. (C3) x3 5-3

4 Surround PWB 1. Screw ...................(D1) x2 5-3

(162H Only)

5 Tape Mechanism 1. Screw ................... (E1) x4 6-1

6 CD Mechanism 1. Screw ................... (F1) x3 6-1

7 Terminal PWB 1. Screw ...................(G1) x5 6-2

8 Battery PWB 1. Hook ..................... (H1) x2 6-3

2. Screw ................... (B2) x3

2. Hook.....................(G2) x1

(A1)x3
ø3x12mm

Rear Cabinet

(A1)x1
ø3x12mm

Figure 5-1

Figure 5-2

162H ONLY

(C1)x2
ø3x10mm

Headphones
PWB

– 5 –

(C1)x6
ø3x10mm

(C3)x3

(C2)x1

(C2)x2

Figure 5-3

(D1)x2
ø3x10mm

Top Cabinet

SURROUND
PWB

Switch
PWB

Main PWB

QT-CD141H/161H/162H

Driver

Push

(G2)x1

(E1)x4
ø3x10mm

(F1)x3
ø2.5x10mm

Tape
Mechanism

Pull

Top Cabinet

(H1)x1

CD Mechanism

Figure 6-1

Rear Cabinet

Battery PWB

(C2)x1

Pull

(C1)x1
ø2.5x8mm

(H1)x1

Rear Cabinet

(G1)x2
ø3x12mm

(G1)x1
ø3x10mm

Terminal PWB

(G1)x2
ø3x10mm

Figure 6-2

Figure 6-3

REMOVING AND REINSTALLING THE MAIN P ARTS

CD MECHANISM SECTION

Perform steps 1, 2, 3 and 5 of the disassembly method to
remove the CD mechanism.

How to remove the pickup (See Fig. 6-4.)

1. Remove the screws (A1) x 2 pcs., to remove the shaft (A2)
x1 pcs.

2. Remove the stop washer (A3) x1 pcs., to remove the gear
(A4) x 1 pcs.

3. Remove the pickup.

– 6 –

Shaft
(A2) x1

(A1) x2
ø2.6 x6mm

Pickup

CD
Mechanism

Stop
Washer
(A3) x1

Gear
(A4) x1

Figure 6-4

ADJUSTMENT

MECHANISM SECTION

• Driving Force Check

Torque Meter

PLAY: TW-2412 Over 120 g

• Torque Check

Torque Meter

Play: TW-2111 25 to 65 g.cm
Fast Forward: TW-2231 60 to 130 g.cm
Rewind: TW-2231 60 to 130 g.cm

• Head Azimuth

Torque Meter

MTT-114 Output: Speaker Terminal

(CNP201 Load resistance: 8 ohms)

• Tape Speed

Test

Tape

MTT-111 Variable 3,000 ± 90 Hz Output: Speaker

Adjusting

Point

Resistor in Teaminal
motor(M601) (CNP201 Load

Specified

TAPE SECTION

Position of each switch or control

Volume control Max
Function switch Tape/Power Off
X-BASS On
Surround (162H ONLY) On

• Bias Oscillation

Adjustment Point

L301 82 kHz ± 6 kHz Pin 2 of CNP201

• Playback Amplifier Sensitivity Check

Test Tape

MTT-118 1.8 V ± 3 dB Speaker Terminal

L3

AM BAR

ANTENNA

Specified Value

AM TRACKING

fL fH

FM RF

TC1

R7

FM IF

L1

T1

1

IC1

Specified Value

– 6 kHz

COVERAGE

TP1

L2

Specified Value

Specified Value

Specified Value

Instrument

Value

Instrument Connection

(CNP201 Load resistance: 8 ohms)

FM ROD ANTENNA

AM BAND

Connection

resistance: 8 ohms)

Instrument

Connection

MAIN PWB

T2

FM DET.

L4

FM BAND

COVERAGE

1

AM IF

TP2

13

19

17

21

IC2

T3

VR1

VCO

R29

QT-CD141H/161H/162H

TUNER SECTION

fL: Low-range frequency
fH: High-renge frequency

• FM RF

Signal generator: 1 kHz, 75 kHz dev., FM modulated

Test Stage

Band — 87.50 MHz (fL): L2 *1
Coverage 2.0 ± 0.1 V

RF 98.00 MHz 98.00MHz L1 *2

Frequency

(10~30 dB)

*1. Input: Antenna, Output: TP1
*2. Input: Antenna, Output: Speaker Terminal

• Detection

Signal generator: 10.7 MHz, FM sweep generator

Test

Stage

IF 10.7 MHz 98.00 MHz T1 (Turn Input: Pin 1 of

Frequency

• AM IF/RF

Signal generator: 400 Hz, 30%, AM modulated

Test Stage

IF 450 kHz 1,620 kHz T3 *1

Band — 522 kHz (fL): L4 *3

Coverage
Tracking 600 kHz 600 kHz (fL): L3 *2

Frequency Frequency

1,400 kHz 1,400 kHz (fH):TC1

*1. Input: Antenna, Output: Pin19 of IC2
*2. Input: Antenna, Output: Speaker Terminal
*3. Input: Input is not connected, Output: TP1

• VCO Frequency

Adjusting Point

VR1 76 kHz ± 200 Hz Pin 13, pin 21 and

Note:

After preparing the test circuit shown in Fig. 7-1, connect the
Pin 13, Pin 21 and ground of the IC2 with the test circuit, and
measure the value. At this time, apply a standard unmodulated
signal input and adjust the VCO.

Pin 13 of IC2 Pin 21 of IC2

G

Figure 7-1 VCO FREQUENCY TEST CIRCUIT

D

S

Frequency

Display

Frequency

Display

Display

Specified

Value

Setting/

Adjusting

Setting/

Adjusting

Parts

the core of IC1
T1 fully Output: TP2
counter­clockwise.

Setting/

Adjusting

1.35 ± 0.05 V

FET : 2SK19 or 2SK54

10 kohm

Instrument

Connection

Parts

Instrument

Connection

Instrument

Connection

Parts

Instrument

Connection

ground of IC2

TO FREQUENCY
COUNTER

Figure 7-2 ADJUSTMENT POINTS

– 7 –

QT-CD141H/161H/162H

TURNING ON THE TEST MODE

The types of test mode for this microcomputer and specific test mode turning-on procedure are as follows. Only the unit key is used.
The remote control key is not valid. The power must be turned on while two keys are held down.
(1) CD test mode function

The power is turned while the (PRESET ) and STOP (TUNING ) keys are held down.

(2) Tuner test mode function

The power is turned on while the (PRESET ) and PAUSE (BAND) keys are held down.

(3) LCD test mode function

The power is turned on while the (PRESET ) and MEMORY keys are held down.

CD TEST MODE

When the CD test mode is turned on, the CD pickup is moved to the innermost periphery, and the following indication appears.
The operation of CD test mode is as follows.

Indication

(1) The CD pickup is moved with the unit UP key and DOWN key.

UP key: The pickup is slid to the outer periphery.
DOWN key: The pickup is slid to the inner periphery. However, when it reaches the innermost periphery, it does not move further
inward.

(2) When the PLAY key is pressed in stop state, "the laser diode turns on if CD lid is closed" .
Indication

(3) When the PLAY key is pressed in laser ON state, playback is started from the current position of pickup.
Indication

(4) When the STOP key is pressed during playback, the laser goes out and playback is stopped, and the process returns to step

(1). (The pickup position does not change.)

(5) When the MEMORY key is pressed during playback, tracking servo ON/OFF is performed. (Even if the playback is stopped

in servo OFF state, the servo is turned on when the playback is restored.)

Indication

Others

While the CD lid is open (LID-SW = "H"), the test mode is turned on but the operations of step (2) and subsequent steps are not
performed. The operation of step (1) is performed.

The current playback track No. and time are indicated.

The current pickup position and time are indicated. (When the
pickup is moved with the UP/DOWN key, the time at that point
is indicated.)

Contents of error display

Error display

Er 01
Er 02

when TOC information cannot be read normally.
When a PU-IN SW detection error occurs.

Contents of an error

TUNER TEST MODE

The tuner test mode is intended to store the measurement frequency for adjustment and inspection in the preset memory CH
without frequency adjustment in the case of tuner adjustment in the production line.
When the power is turned on while the PRESET (DOWN) key and BAND (PAUSE) key are held down together, the frequency
for adjustment measurement of destination (specified according to AREA terminal) is preset-stored in the preset memory CH. (The
frequency to be preset-stored for specific destination is as shown in the next page.)

– 8 –

QT-CD141H/161H/162H

In the tuner test mode the band is FM, and the mode is FM STEREO in case of start-up.
As with the ordinary mode, when the PRESET key is pressed for 1ch of preset memory CH, maximum CH is set. When the

PRESET key is pressed for maximum CH of preset memory CH, 1ch is set.
The BAND key is valid. As in the ordinary mode, the band/FM MONO/STEREO mode can be switched.
To exit from the tuner test mode, turn off the power to the microcomputer.
Indication

Preset frequencies for various destinations (random preset memory)

BAND (CH) U.S.A. EUROPE GENERAL 1 GENERAL 2

1 FM 87.5M FM 87.50M FM 87.50M FM 87.5M
2 FM 108.0M FM 108.00M FM 108.00M FM 108.0M
3 FM 98.0M FM 98.00M FM 98.00M FM 98.0M
4 FM 90.0M FM 90.00M FM 90.00M FM 90.0M
5 FM 106.0M FM 106.00M FM 106.00M FM 106.0M
6 AM 530K AM 522K AM 531K AM530K
7 AM1720K AM1620K AM1602K AM1620K
8 AM 990K AM 990K AM 990K AM 990K
9 AM600K AM 603K AM 603K AM 600K
10 AM 1400K AM 1404K AM 1404K AM 1404K
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30

Note:
The unit shown in table is Hz. K is x1000. M is x1,000,000.
The slash indicates that data are not stored in the memory.
FM is stereo mode.

The indication is the same as that of ordinary operation. However,
when the test mode is turned on, the indication shown left lights
for one second.

LCD TEST MODE

When the LCD test mode is turned on, all the segments of LCD light.
Indication

– 9 –

QT-CD141H/161H/162H

NOTES ON SCHEMA TIC DIAGRAM

• Resistor:
To differentiate the units of resistors, the symbol as K and M
are used: the symbol K means 1000 ohm and the symbol M
means 1000 kohm and the resistor without any symbol is an
ohm resistor. The resistor designated "Fusible" is a fuse type
resistor

• Capacitor:
To indicate the unit of capacitor, a symbol P is used: this
symbol P means micro-micro-farad and the unit of the capacitor
without such a symbol is microfarad. As to electrolytic capacitor,
the expression “capacitance/withstand voltage” is used.
(CH), (TH), (RH), (UJ): Temperature compensation
(ML): Mylar type
(P.P.): Polypropylene type

• The indicated voltage in each section is the one measured by
Digital Multimeter between such a section and the chassis
with no signal given.

REF. NO DESCRIPTION POSITION

SW102 RECORD/PLAYBACK PLYBACK—RECORD
SW201 FUNCTION/POWER TAPE—TUNER—CD/

OFF—ON
SW202 X-BASS OFF—ON
SW203 SURROUND(162H ONLY) OFF—ON
SW501 TUNER UP OFF—ON
SW502 TUNER DOWN OFF—ON

1. Tuner
( ): AM mode
Marking except for ( ): FM mode

2. CD
( ): Play mode
Marking except for ( ): Stop state

3. Deck section
( ): Record mode
Marking except for ( ): Playback mode
Display / Control section:
( ): Active state
Marking except for ( ): CD Function mode at stop state

• Schematic diagram and Wiring Side of P.W.Board for this
model are subject to change for improvement without prior
notice.

• Parts marked with “ ” ( ) are important for

maintaining the safety of the set. Be sure to replace these
parts with specified ones for maintaining the safety and
performance of the set.

REF. NO

SW503 BAND OFF—ON
SW504 MEMORY OFF—ON
SW505 PRESET DOWN OFF—ON
SW506 PRESET UP OFF—ON
SW507 CD LID OPEN/CLOSE OFF—ON
SW601 TAPE MAIN OFF—ON
SW702 PICKUP IN OFF —ON

DESCRIPTION

POSITION

FRONT

VIEW

E C B
(S)(G)(D)
(1) (2) (3)

KTA1266 GR
KTA1273 Y
KTC3194 Y
KTC3199 GR
KTC8050 D
KRA102 M
KRA109 M
KRC104 M
KRC107 M

Figure 10 TYPES OF TRANSISTOR

– 10 –

TO

MAIN

SECTION

+7.4V

(CD)

QT-CD141H/161H//162H

+5V

LASER

DRIVER

+5V

Q801

XL801

16.93MHz

23

6

45

62

64

51 37

62

634364

XVDD
VDD

VVDD

LC78622E

SERVO/SIGNAL

XIN

XOUT

LDD
VCC1

CONTROL

EFMO

104412

9

IC801

F

E

FIN1

FIN2

123

4

46

LCHO

IC802

V/P

CLV+

CLV–

13

43

44

SLI

14

15

SLC

HFL

16

CV+

EFMIN

LA9240M

SERVO AMP.

3955385433

TES

TOFF

18 19

17

~

3240

JP–

SL–

31

30

32

11

8
4
2

53

56
57
58

RES. CQCK. COIN

SQOUT. RWC. WRQ

61

1

JP–

JP+

TGL

20

54

DRF

53

CE

52

DAT

51

CL

50

CLK

49

DEF

29

SLD

SLEQ

28
27

SPO

FD

16

TO

SL+

15

CL, DAT, SELIAL CONTROL

CONSTANT

VOLTAGE

Q804

REGULATOR

+5V

+7.4V

30

1

978

IC803

LA6541

FOCUS/TRACKING

3

/SPIN/SLIDE

13
29
28

18

25

DRIVER

20

26

5

21

6

22

24

102511

PICKUP UNIT

FOCUS COIL

TRACKING COIL

Figure 11 BLOCK DIAGRAM (1/3)

– 11 –

TO MAIN

SECTION

M

M701

SPINDLE

MOTOR

M

M702

SLED

MOTOR

TO MAIN

SECTION

QT-CD141H/161H/162H

J201

HEADPHONES

LA4597

POWER AMP.

IC201

KIA4558S

SURROUND

FROM TUNER

SECTION

IC2-9,10PIN

IC202

VOLUME

AMP.

FUNCTION
SW201-A,B

SW202

A,B

X-BASS

RADIO

POWER/

SPEAKERS

SP501

L-CH

12

L

2

8

LR

6

VR201

A,B

TAPE

SP502

R-CH

10

R

6

2

4

SW203

SURROUND

REC

REC/P.B

SW102

Q201
Q202
Q251

A,B

A,F

11

8

5

5
37

STANBY

VOLTAGE

REGULATOR

162H

ONLY

REC

P. B

1

L

12

R

+B1

SW201-C

3

IC203

KIA7808P

1

6

POWER/

FUNCTION

2

+B2

8

SO601

+B

AM / FM

SELECT

SW201-D

POWER/

FUNCTION

AC INPUT

AC 230-240V

50Hz

T601

F651

FM +B

T1.25A L 250V

POWER

TRANSFORMER

RECTIFIER

D651~D654

M601

TAPE

MOTOR

+B1

SW201-G

REC/P.B

DC12V

BATTERY

["D" SIZE (UM/SUM-1,

R20 or HP-2)BATTERYx8]

TUNER

+B

BACK UP

+B

SW601

MAIN

DC3V

BATTERY

["AA" SIZE (UM/SUM-3,

FOR TUNER MEMORY]

R6 or HP-7)BATTERYx2

CD

FROM

CD/DISPLAY

SECTION

AMP.

IC101

BA331IL

R

9

REC

EQULIZER

REC/P.B

SW102

C,E

P.B

REC

SW102

REC/P.B

P.B

L-CH

REC/P.B

HEAD

L

5

P.B

Figure 12 BLOCK DIAGRAM (2/3)

– 12 –

B.D

R-CH

Q351
L301

SW102-H

REC/P.B

ERASE

HEAD

BIAS
OSC.