Sharp QT-CD210C, QT-CD210 User Manual

Illustration: QT-CD210

QT-CD210/C

SERVICE MANUAL

No. SY964QTCD210/

QT-CD210(BL)
QT-CD210(S)
QT-CD210(WH)
QT-CD210C(S)

• 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.

CONTENTS

Page

IMPORTANT SERVICE NOTES (FOR QT-CD210 ONLY) ............................................................................................... 2

SPECIFICATIONS ............................................................................................................................................................. 2

NAMES OF PARTS ........................................................................................................................................................... 3

FITTING OF DIAL POINTER ............................................................................................................................................. 3

DISASSEMBLY.................................................................................................................................................................. 4

REMOVING AND REINSTALLING THE MAIN PARTS..................................................................................................... 4

ADJUSTMENT ................................................................................................................................................................... 6

SCHEMATIC DIAGRAM .................................................................................................................................................... 8

WIRING SIDE OF P.W.BOARD....................................................................................................................................... 10

NOTES ON SCHEMATIC DIAGRAM .............................................................................................................................. 12

TYPES OF TRANSISTOR ............................................................................................................................................... 12

WAVEFORMS OF CD CIRCUIT...................................................................................................................................... 13

TROUBLESHOOTING (CD SECTION) ........................................................................................................................... 14

FUNCTION TABLE OF IC................................................................................................................................................ 18

PARTS GUIDE/EXPLODED VIEW
PACKING OF THE SET (FOR QT-CD210 ONLY)

SHARP CORPORATION

– 1 –

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

QT-CD210/C

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

IMPORTANT SERVICE NOTES (FOR QT-CD210 ONLY)

BEFORE RETURNING THE AUDIO PRODUCT

(Fire & Shock Hazard)
Before returning the audio product to the user, perform the
following safety checks.

1. Inspect all lead dress to make certain that leads are not
pinched or that hardware is not lodged between the chassis
and other metal parts in the audio product.

2. Inspect all protective devices such as insulating materials,
cabinet, terminal board, adjustment and compartment
covers or shields, mechanical insulators etc.

3. To be sure that no shock hazard exists, check for leakage
current in the following manner.

* Plug the AC line cord directly into a 120 volt AC outlet.
* Using two clip leads, connect a 1.5k ohm, 10 watt resistor

paralleled by a 0.15µF capacitor in series with all exposed
metal cabinet parts and a known earth ground, such as
conduit or electrical ground connected to earth ground.

* Use a VTVM or VOM with 1000 ohm per volt, or higher,

sensitivity to measure the AC voltage drop across the
resistor (See diagram).

* Connect the resistor connection to all exposed metal parts

having a return path to the chassis (antenna, metal cabinet,
screw heads, knobs and control shafts, escutcheon, etc.)
and measure the AC voltage drop across the resistor.

VTVM

AC SCALE

1.5k ohms
10W

0.15 µ F

TO EXPOSED
METAL PARTS

All check must be repeated with the AC line cord plug connection
reversed.
Any reading of 0.3 volt RMS (this corresponds to 0.2 milliamp.
AC.) or more is excessive and indicates a potential shock
hazard which must be corrected before returning the audio
product to the owner.

TEST PROBE

CONNECT TO
KNOWN EARTH
GROUND

SPECIFICATIONS

● General
Power source: AC 120 V, 60 Hz

DC 9 V [ "D" size (UM/SUM-1, R20
or HP-2) battery × 6]

Power
consumption: 12 W

(For QT-CD210)

Output power: FTC; 2.0 W min. RMS per channel

into 4 ohms from 150 Hz to 20
kHz, with no more than 10 % total
harmonic distortion.
RMS; 2.3 W/CH
(DC operation, 10 % T.H.D.)

Speakers: 4" (10 cm) full-range speaker x 2
Dimensions: Width; 15-3/4" (400 mm)

Height; 6-1/4" (158 mm)
Depth; 8-3/8" (212 mm)

Weight: 6.0 lbs. (2.7 kg) without batteries

(For QT-CD210C)

Output power: RMS; 2.3 W/CH

(DC operation, 10 % T.H.D.)

Speakers: 10 cm (4") full-range speaker x 2
Dimensions: Width; 400 mm (15-3/4")

Height; 158 mm (6-1/4")
Depth; 212 mm (8-3/8")

Weight: 2.7 kg (6.0 lbs.) without batteries

● Compact disc player
Type: Compact disc

Signal
readout:

Non-contact, 3-beam semi­conductor laser pickup

Audio
channels: 2
Filter: 8-times oversampling digital filter
D/A
converter: 1-bit D/A converter
Wow and
flutter:

Unmeasurable
(less than 0.001% W. peak)

● Radio
Frequency
range:

FM; 87.6 - 108 MHz
AM; 530 - 1,720 kHz

● Tape recorder
Frequency

response: 50 - 14,000 Hz (Normal tape)
Signal/noise
ratio: 50 dB
Wow and
flutter: 0.25 % (WRMS)
Motor: DC 9 V electric governor
Bias system: AC bias
Erase
system: Magnet erase

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

– 2 –

11.

(TAPE) Record Button

12.

(TAPE) Play Button

13.

(TAPE) Rewind Button

14.

(TAPE) Fast Forward Button

15.

(TAPE) Stop/Eject Button

16.

(TAPE) Pause Button

17.

Cassette Compartment

18.

CD Compartment

19.

Tuning Control

10.

(CD) Stop Button

11.

(CD) Track Down/Review Button

12.

Volume Control

13.

Function Selector/Power Switch

14.

(CD) Track Up/Cue Button

15.

(CD) Play/Pause Button

16.

(CD) Play Indicator

17.

(CD) Pause Indicator

18.

Battery Compartment

19.

FM Telescopic Rod Aerial

20.

AC Power Input Socket

NAMES OF P ARTS

123

10

11

16
17

12

456

13 14

18 19 20

QT-CD210/C

78

9

15

FITTING OF DIAL POINTER

Setting method of the dial pointer

1. Remove the front cabinet. (Refer to Fig.4-1 on page 4,
"Disassembly method".)

2. Remove the dial pointer.

3. Insert the dial pointer from A of the top cabinet so that it

engages with the drum gear.

4. Fully turn the drum in the opposite direction of B and set

it to the FL marks.

5. Reassemble the front cabinet.

FL Mark

Carved Seal

Top Cabinet

Dial Pointer

Dial Pointer

Dial
Pointer

Drum

Drum

Top Cabinet

Tuning
Knob

A

B

Main
PWB

Mark

Figure 3-1

FH

FL

Drum

Top Cabinet

Main
PWB

Variable Capacitor

Figure 3-2

– 3 –

QT-CD210/C

DISASSEMBLY

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.

STEP REMOVAL PROCEDURE FIGURE

1 Top Cabinet/ 1. Screw ................... (A1) x7 4-1

Front Cabinet 2. Socket .................. (A2) x1

2 Power PWB 1. Screw ................... (B1) x2 4-2

2. Hook..................... (B2) x2

3. Socket .................. (B3) x1

4. Hook..................... (B4) x2

3 Main PWB/ 1. Socket ..................(C1) x1 4-2

CD Control PWB 2. Screw ................... (C2) x7

(Note) 3. Screw ...................(C3) x1

4. Solder................... (C4) x3

5. Socket ..................(C5) x3 4-3

6. Screw ...................(C6) x2

4 CD Mechanism 1. Screw ................... (D1) x3 4-3

5 Tape Mechanism 1. Screw ................... (E1) x4 4-3

Main PWB

(B4)x2

(B2)x2

Power PWB

(D1)x3
ø2.5x10mm

Washer

(C5)x1

(C2)x7
ø3x12mm

Power
Transformer

CD Mechanism

(B1)x2
ø3x12mm

Figure 4-2

(C5)x2

Top Cabinet

AC Socket

(C3)x1
ø2.5x8mm

CD Lid
Switch

(B3)x1

(C1)x1

(E1)x4
ø3x10mm

(C4)x3

Top Cabinet

(A1)x4
ø3x12mm

Front Cabinet

Main
PWB

(A2)x1

(A1)x3
ø3x12mm

REMOVING AND REINSTALLING THE MAIN PARTS

CD MECHANISM SECTION

Perform steps 1 to 4 of the disassembly method to remove the
CD mechanism.

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

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

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

3. Remove the pickup.

Note : (Figure 4-3 and Figure 4-4)

After removing the connector for the optical pickup from the

connector, wrap the conductive aluminium foil around the
front end of connector to protect the optical pickup from
electrostatic damage.

(C6)x2
ø3x8mm

(A1) x2

ø2.6 x6mm

Pickup

Shaft
(A2) x1

CD Control
PWB

Figure 4-3Figure 4-1

Gear
(A4) x1

Figure 4-4

Tape
Mechanism

Top Cabinet

CD
Mechanism

Stop
Washer
(A3) x1

– 4 –

QT-CD210/C

TAPE MECHANISM SECTION

Perform steps 1 to 5 of the disassembly method to remove the
tape mechanism. (See page 4.)

How to remove the record / playback and erase
heads (See Fig. 5-1.)

1. Remove the screws (A1) x 2 pcs., to remove the record/
playback head.

2. Remove the hooks (A2) x 2 pcs., toward the center position

as shown in Fig. 5-1. and then extract the erase head
upward.

Note:

After replacing the heads and performing the azimuth
adjustment, be sure to apply screwlock.

How to remove the pinch roller (See Fig. 5-2.)

1. Carefully bend the pinch roller pawl in the direction of the

arrow <A>, and remove the pinch roller (B1) upwards.

Hook
(A2)x2

Erase Head

Pinch Roller
(B1)x1

(A1) x1
ø2x7mm

(A1) x1
ø2x3mm

Record/Playback
Head

Figure 5-1

<A>

Pinch Roller
Pawl

Figure 5-2

How to remove the belts (See Fig. 5-3.)

1. Remove the main belt (C1) x 1 pc., from the motor pulley.

2. Remove the FF/REW belt (C2) x 1 pc., from the REW/FF

roller.

3. Put on the belts in the reverse order of removal.

Note:

When putting on the belt, ascertain that the belt is not twisted,
and clean it.

How to remove the motor
(See Figs. 5-4.)

1. Remove the mainbelt.

2. Remove the screw (D1) x 1 pc., to remove the motor mount.

3. Remove the screws (D2) x 2 pcs., to remove the motor.

Note:

When mounting the motor, pay attention to the motor mounting
angle.

How to remove the flywheel (See Fig. 5-5.)

1. Remove the belt.

2. Remove the stop washer (E1) x 1 pc., with a small precision

screwdriver to extract the flywheel from the capstan metal.

Note:

When the stop washer is deformed or damaged, replace it
with a new one.

Flywheel

FF/REW Belt
(C2)x1

Motor

Motor Mount

(E1) x 1
Stop Washer

Main Belt
(C1)x1

Washer

Flywheel

Figure 5-3

(D2)x2
Special
Screw

(D1)x1
Special
Screw

Figure 5-4

Motor

REW/FF
Clutch Ass'y

Motor
Mount

Motor

How to reinstall the parts

Install each part in the reverse order of the removal with care.

Figure 5-5

– 5 –

QT-CD210/C

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: 4 ohms)

• Tape Speed

Test

Tape

Adjusting

Point

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

resistor in Teaminal
motor. (M601) (CNP201 Load

Specified

Specified Value

Specified Value

Specified Value

Value

Instrument

Connection

resistance: 4 ohms)

• AM IF/RF

Test Stage

Specified

Value/Adjusting

Point

AM IF T3 Input: Antenna

AM fL: L4 Input: Antenna
Band Coverage fH: TC4 Output: Speaker
AM Tracking fL: 600 kHz: L3 Terminal (CNP201

fH: 1,400 kHz: TC3 Load resistance: 4

2

3

4

CNP101

IC101

SW102

11

12

2

L301

BIAS OSC.

1

CNP602

Instrument

Connection

Output: Pin 18 of IC1

ohms)

1

1

CNP201

123

TAPE SECTION

Position of each switch or control

Volume control Max
Function switch Tape/Power Off

• Bias Oscillation

Adjustment Point

Specified Value

L301 82 kHz ± 6 kHz Pin 1 of CNP101

Instrument

Connection

• Playback Amplifier Sensitivity Check

Test Tape

Specified Value

MTT-118 1.1 V ± 3 dB Speaker Terminal

Instrument Connection

(Load resistance: 4 ohms)

TUNER SECTION

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

• FM IF/RF

Test Stage Specified

Value/Adjusting

Point

FM Detection T2

FM fL: L2
Band Coverage fH: TC2

FM Tracking fL: 88.0 MHz: L1

fH: 108.0 MHz: TC1

Instrument

Connection

Input: Pin 1 of IC1
Output: Pin 18 of IC1

Iuput: Antenna
Output: Speaker
Terminal (CNP201
Load resistance: 4
ohms)

FM ROD
ATENNA

MAIN PWB

FM
DETECTION

L3
AM BAR
ANTENNA

T2

12

IC1

13

L4

AM BAND
COVERAGE

IC803

T3

18

L2

fL

AM IF

1

24

fH

FM BAND
COVERAGE

fL

TC2

TC4

TC1

TC3

VR201

SW201

fH

fH

FM
TRACKING

fL

L1

fH

AM
TRACKING

fL

– 6 –

Figure 6 ADJUSTMENT POINTS

CD SECTION

Since this CD system incorporates the following automatic
adjustment function, when the pickup is replaced, it is not
necessary to reajust it.
Since this CD unit does not need adjustment, the combination
of PWB and laser pickup unit is not restricted.

TEST MODE

QT-CD210/C

Start
Note

Operation

LCD MODE

Start

Display

While holding down the "PLAY" button, move the FUNCTION/POWER switch to "CD".

1. When the CD LID switch is in the OFF position, (CD LID is open) the unit will be able to enter the test mode.
However, can use the "UP/CUE" and "DOWN/REVIEW" button only.

2. You can only move the pickup.

3. The LCD display should be the same as it is for normal CD operations.
The use of the "UP/CUE" button will move the pickup to the outermost position.

1

The use of the "DOWN/REVIEW" button will move the pickup to the innermost position.
When the "PLAY" button is pressed, the laser will be lit. If the laser is lit and the "PLAY" button is pressed again,

2

play back will start from the current pickup position . In the playback operation, the "STOP" button is pressed,
the laser will be geve out and the playback is stopped.

After connecting of the 10kΩ resistor between IC802 27 pin and GND and holding down the "PLAY" button, move
the FUNCTION/POWER switch to "CD".

– 7 –

QT-CD210/C

C856

0.001

C832
47/16

C22

0.1/50

L801

0.82µH

D801
1N4004

L4

AM OSC.

Q803
KRC107 M
SWITCHING

R850

1.5K

Q802
KTA1273 Y
SWITCHING

C806
330/16

C805

0.022

C21
2P(CH)

R3

220K

C13

220/10

R126
100

C122

0.01

R10

2.2K

R11

2.2K

COR1
CORE

SW201-C

SW201-B

C1

0.022

C20

0.047

C2
18P
(CH)

T3

CF3
460KHz

C14

0.022

IC1
TA2111N

9

8

7

6

5

43

2

1

T2

F1

FM BAND

PASS FILTER

D1

1N4148

R2

2.7K

C4
4P(CH)

C3
22P(UJ)

L2

VC3

CNP101

BI802

BI801

C817

100/10

D2

1N4148

R6
100

C854

0.0068

C807

0.047

R456
15K

R455
15K

R457
1K

R458
1K

R7
120

R853

2.2K

R852

2.2K

R110
120

D101

1N4148

R123

3.3K

R124

3.3K

R851

2.2K

C816

0.022

IC801

TA2109F

24

23

22

21
20
19
18
17
16
15

14
13

12

11

10

9

8

7

6

5

4

3

2

1

C814

0.047

C813
47/16

C106

0.0027

R106
10K

R114

8.2K

R105
10K

C107

820P

C114
47/16

D102

1N4148

C118
10/16

R102
150

C109
270P

R109
120

C115

0.018(ML)

R116

3.9K

R115

3.9K

C111
330P

R108
1K

C105

0.0027

R122

1.8K

R802

2.2K

C815
47/16

BI803

R107
1K

R120

3.3K

C110
270P

C113
47/16

C802

0.022

C804
2P
(CH)

R811
22K

R5

3.3K

C6
330P

CF1

10.7MHz

C11

0.47/50

C15
10P
(CH)

R1

330

C12

4.7/50

C17

1/50

C19

0.015
(ML)

C16

1/50

C18

0.015(ML)

R9

10K

C10
1/50

C7

2.2/50

C9

0.1/50

C8

0.1/50

R4

2.2K

R8

10K

R820
47K

R833

3.3K

C841

0.047

C833

0.033(ML)

C838

0.047(ML)

R830

10K

C839

0.047(ML)

R831

3.3K

C835
470P

C834
470P

R827
15K

C82

0.0

C836

0.047(ML)

C

0.

C825
47/16

C826
47P

C837

0.047(ML)

R828
10K

C829

0.0047

C828

0.0027

C830

0.01(ML)

C123
220/10

C822

0.047

Q801
KTA1266 GR
SWITCHING

C818
56P

C821
100/10

R803
82K

C117
10/16

IC101

BA3311L

9

8

7

6

5

4

3

2

1

C108
820P

R121

1.8K

C116

0.018(ML)

R801
22

C863
47/16

C842

0.047

C843
47/16

IC803
LA6541D

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

R804
68K

C819

0.1(ML)

R117

3.9K

R113

8.2K

C820

0.1(ML)

R806

2.7K

R805
39K

R807
1K

L301

BIAS OSC.

C351

0.0022
(ML)

R35
150

C121

0.01

C120

47/16

C119

2.2/50

R125
680K

C112
330P

R101
150

R118

3.9K

R351
100

C354

0.022

C352
100/10

R119

3.3K

R104

12K

R103
12K

C801

0.01

SW102-A

SW102-F

SW102-E

SW102-B

SW102-C

SW102-H

SW102-G

SW102-D

NC

NC

NC

NC

NC

CNS101

FM

AM

4

3

R-CH

L-CH

TRO

FOO

DMO

FMO

VCC

VREF

CD

RES

REG IN

REG OUT

VIN4

VIN3

VIN

GND

GND

GND

GND

GND

GND

VG4

VG3

VG2

VO4-

VO4+

VO3-

VO3+

VO2+

VO2-

VO1-

VO1+

VG1

VIN1

MT

VCC

AM OSC.

FM ANT

ST

LED

TUN

LED

AM RF
IN

FM RF

OUT

RF

GND

L3

AM BAR ANTENNA

LPF1

AM/FM

LPF2

VCO

GND

AM IF

IN

FM IF

IN

AM

AGC

AM LOW

CUT

CNS802

CNS801

CNS803

R-CH(CD)

L-CH(CD)

GND(AUDIO)

RF

VCC

FM

OSC

AM

OSC

VCC

FM

AFC

DET

MPX IN

CNP803

FM ROD
ANTENNA

ALC T

FILTER

VCC

GND

NF1

NF2

IN2

IN1

OUT2

OUT1

R

P

R

R

P

R

P

P

P

R

R

R

R

L-CH

R-CH

PRE AMP

ERASE HEAD

TAPE

AM
FM
CD

CD

TAPE

FM OSC.

AM ANT

FM OSC.

AM IF

L-CH

R-CH

FM RF

IN

MIX

OUT

FM

DET

P

+

+

-

-

SP+
SP­SL+
SL-

PU-IN

LD

K
E

E

K

LD

VR

PD

G

B

B

A
F

F

C

TR+

TR-

FO+

FO-

R­R+
F+
F-

2200P

2200P

PICK-UP UNIT

CD MOTOR PWB-B

M701
SLED

MOTOR

M702

SPINDLE

MOTOR

FC-

FC+

TR-

TR+

GND
PD
VR
LD

GND

K

F

B

E
A

VCC

FNI
FPI
TPI
TNI
MDI
LDO

SEL
TEB
2VRO
TEN

TEO

RFN

GND

RFO

AGCI
RFGC
RFGO

RFIS

RFRP

VRO

FEN

FEO

SBAD

MON

1M

1M

SLT-

SLT+

FM-

FM+

DM-

DM+

6

4 3
2
1

13

17
16
15
14

12

8

9
10
11

2

1

3

16

2

4

5

3

16 17 18

4

4

5

654

1

5
4
3
2

6
5

5
6
7
8

1
2
3
4

987

3

2

1

2

1

3
4

3

2

1

2

1

3

3

2

1

M

3

1

19

20 21

5

1
2
3
4

4
3
2
1

M

1

463

2
1

1
2
3

22

23

24

2

3

4

5

6

1

5

1

2

3

4

2

8

7

6

4

13

14

15

12

11

10

2

5
6
7
8

3

4

5

6

1

2

SW702
PICKUP IN

A

NC

NC

NC

NC

NC

NC

1

2

3

L1
FM IF

16

17

18

19

20

2122232425

2627282930

1

2 3

10 11

12

13

14

15

16

17

18

1920

21222324

11 12

10

P

P

NC

VC1

VC2

VC4

TC3

TC4

TC2

TC1

NC

NC

NC

IC801

SERVO PRE AMP.

TA2109F

IC803

FOCUS/

TRACKING/

SPIN/

SLED DRIVER

LA6541D

IC1

FM/AM IF MPX.

TA2111N

FM IF

AM IF

SW102
RECORD/PLAYBACK

SW102
RECORD/
PLAYBACK

IC101
REC./
P.B. EQUALIZER AMP.
BA3311L

SW201
FUNCTION
SELECTOR

MAIN PWB-A1

RECORD/
PLAYBACK HEAD

TAPE

SW102
RECORD/
PLAYBACK

SW10
RECO
PLAY

FM DETECTION

9

8

7

6

5

4

3

2

1

12

11

10

PIN
NO.

VOLTAGE

IC1

0.82V(0V)
0V(0V)

0.35V(1.03V)

3.81V(3.82V)
0V(0.13V)

3.92V(3.86V)

3.39V(3.18V)

3.92V(3.86V)
0V(0V)
0V(0.14V)

0.32V(0.32V)

3.14V(3.29V)

21

20

19

18

17

16

15

14

13

24

23

22

PIN
NO.

VOLTAGE

1.22V(1.22V)

1.22V(1.22V)

3.20V(3.14V)

3.14V(3.92V)

0.7V(0.70V)

1.08V(1.01V)

0.4V(1.02V)

3.92V(3.85V)

3.92V(3.86V)

3.92V(3.86V)

3.92V(3.86V)

3.92V(3.82V)
( ): AM

9

8

7

6

5

4

3

2

1

12

11

10

PIN
NO.

VOLTAGE

IC801

4.84V

2.04V

2.04V

2.12V(0V)

2.11V(0V)

0.18V(0V)

2.84V(0V)

2.41V(0V)

2.05V

4.08V

2.05V

2.08V

21

20

19

18

17

16

15

14

13

24

23

22

PIN
NO.

VOLTAGE

2.86V(0.99V)

2.12V

2.05V

2.05V

2.63V(1.15V)

2.04V

2.07V

2.17V

2.04V

1.47V(0.77V)
0V

2.05V

( ): CD STOP

9

8

7

6

5

4

3

2

1

15

11

10

PIN
NO.

VOLTAGE

IC803

8.15V

1.08V

2.12V

2.10V

4.0V

3.42V
0V
0V
0V

3.85V

3.60V

2.09V

2.09V

6.02V

7.47V

24

23

22

21

20

19

18

17

16

30

26

25

PIN
NO.

VOLTAGE

0V

0.24V

2.13V

2.09V

4.03V

3.38V

0V
0V
0V

3.70V

3.71V

2.09V

2.11V

2.10V

8.14V

13

12
14

28

27
29

3.72V
(5.0V)

( ): CD STOP

1.87V
(1.45V)

2.97V

(4.39V)

( ): CD STOP

8.21V
(8.3V)

8.15V
(8.3V)

7.48V
(7.59V)

0V
(0V)

0V
(0V)

4.97V(5.0V)

1.88V

0V

0.6V

0V

0V

0V

0V

4.67V

0V

4.62V

0.6V 1.89V

VOLTAGE:
PLAY and REC

AM
TRACKING

fH
fL

TC3
L3

AM BAND
COVERAGE

fH

fL

TC4
L4

FM BAND
COVERAGE

fH
fL

TC2

L2

FM
TRACKING

fH
fL

TC1
L1

SW102
RECORD/
PLAYBACK

SW102
RECORD/
PLAYBACK

+B

+B

+B

+B

+B

+B

2

3

8

9
10

A

2

Figure 8 SCHEMATIC DIAGRAM (1/2)

34 5

B

C

D

E

F

G

H

• The numbers 1 to 17 are waveform numbers shown in page 13.

1

– 8 –

6

C834
470P

835
70P

C839

0.047(ML)

STOP

4.97V(5.0V)
803

RC107 M
WITCHING

R-CH(CD)

C832
47/16

C836

0.047(ML)
C837

0.047(ML)
C838

0.047(ML)

D801
1N4004

L-CH(CD)

TAPE

C825
47/16

C826
47P

TAPE
AM
FM
CD

AM
FM
CD

R456
15K

R455
15K

QT-CD210/C

12

C823

R824
10K

R826

R820

220K

47K

R827

C827

15K

0.015(ML)

C830

0.01(ML)

C828

0.0027

C829

0.0047
R828

10K

C833

0.033(ML)

R812

L-CH

12

SW201
FUNCTION
SELECTOR

R-CH

13

SW201-C

R830

10K

R831

3.3K

R833

3.3K

2

L801

0.82µH

1

+B

1K

R829

3.3K

R832

3.3K

R834

3.3K

X801

16.93MHz

3
C845

0.047

GND(AUDIO)

C854

0.0068

+B

R458
1K

R457
1K

SW201-B

8

9
10
11

17
16
15
14

12

51
52
53
54
55
56
57

+B

58
59
60
61
62
63
64
65
66
67
68
69
70

71
72
73
74

C840

75

0.047

76
77
78
79

+B

C844
100/10

GND(POWER)

+5V(CD)

80

R840
10

R860
100

+B

0.022

43 42 41 40 38

46 45 44

494847

50

2.08V
(0V)

TMAX

LPFN
LPFO
PVREF

1.50V

VCOF

0V

AVSS

2.10V

SLCO

2.10V

RFI

4.98V

AVDD

2.10V

RFCT

2.10V

RFZI

2.73V(1.15V)

RFRP

2.30V(2.1V)

FEI

2.94V(0.989V)

SBAD

2.14V

TEI

2.14V

TEZI

2.18V

FOO

2.11V

TRO

2.10V

VREF

2.14V

RFGC

2.10V

TEBC

2.10V

FMO

2.17V

DMO

4.18V

2VREF

2.47V(0V)

SEL

4.97V

VDD2

0V

VSS2

0V

XVSS

2.08V

XI

2.57V

XO
XVDD

4.92V

DVSR

818283 84 85 86 878889 90 919293 94

0V

C853

0.022

R836
270

C852

3.3/50

R215

GND(CD)

2.2K

R216

2.2K

PDO

2.10V

2.48V

RO

C850

0.0022

R838
10K

P2VREF

4.18V

17

2.37V

DVRR

C848

1

22/16

C217

0.0015

C215

0.1(ML)

C216

0.1(ML)

VSS1

0V

13

14

4.72V

DVDD

C849

0.0022

R219
1K

R220

2.7K

C218

0.0015

R837
10K

51
52
53

C847

4.98V

5

11

VDD1

2.10V(1.34V)

2.01V(4.12V)

2.10V

6

15

2.36V

DVRL

22/16

NC

NC

NC

NC

NC

NC

NC

SBSY

SBOK

COFS

DOUT

0V

2.46V

1.66V

4.97V(0V)

7

SIGNAL CONTROL

4

16

0V

0V

0V

2.47V

NC

LO

DVSL

NC

C846
10/16

R835
270

C851

3.3/50

R221
1K

VR201-A
20K(B)

VOLUME

VR201-B
20K(B)

VOLUME

R222
1K

0V

39

NC

NC

NC

NC

NC

NC

/HSO

SPCK

SPDA

4.97V

2.49V

0.43V(2.36V)

( ): STOP

IC802

SERVO/

TC9457F0

0V

4.96V

4.96V

4.95V

REMO-IN

RYNCREC

RESET

R839
47K

MUTE

37 36

TEST5

MXO

NC

TEST4

0.30V

MXI

NC

95

0V0V0V

0V

35 34 33 32

TEST2

TEST3

0V

TRAY OPEN

0V

TRAY CLOS

2.49V

2.49V

2.49V

2.49V

2.49V

4.96V

0V

MVSS

MVDD

96 97 98 99

C855

0.022

C219
1/50

C221

0.001

C222

0.001

C220
1/50

0V

TEST0

TEST1

4.97V

4.98V

4.98V
0V

4.98V
0V

4.98V

0V

DOOR OUT

0V

0V

0V

SEG14
SEG13
SEG12
SEG11
SEG10

2.49V

2.49V

2.49V

2.49V

2.49V

2.49V

2.49V

2.49V

2.33V

2.33V

COM1

COM2

31

NC

NC

NC

NC

0V

PUSEL2

PU IN

0V

MUTE
ADIN2
ADIN1

DISPLAY

PUSEL

PUSEL0

0V

MVSS1

MVDD1

DOOR IN

CDSEL1
CDSEL0

SEG9
SEG8
SEG7
SEG6

SEG5

SEG4

SEG3

SEG2

SEG1

COM3

2.33V

COM4

100

C235
100/10

R231
120

R232
120

C236

C241
47/16

+B

0V

2.33V

NC

NC

NC
NC

NC
NC

NC

NC

NC
NC

NC

NC

100/10

30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10

9
8
7
6
5
4
3
2
1

2.49V

C225
100/10

0V

NC

0V

0.56V

3300/16

+B

7

8

9

4

5

6

C227

+B

0V

+

-

0V

0.56V

IC201

TA8227P

POWER

AMP.

-

0V

+

1

8.35V

C226

0.022

R821
22K

4.67V

8.01V

4.27V

12

R843

3.3K

8.02V

R862
22K

0V

C824

0.022
R861

3.3K

10

14

11

13

4.33V

9.05V

C237
100/10

3

2

+B

R844

3.3K

R846
330

+B

C233
470/10

C239

0.1

C240

0.1

C238
100/10

C234
470/10

POWER PWB-A3

SW810
CD LID

OPEN/CLOSE

FW806

10

1

FM SIGNAL
AM SIGNAL

CD SIGNAL
PLAYBACK SIGNAL
RECORD SIGNAL

CD CONTROL PWB-A2

10

+B

1

+B

SW801
PLAY/
PAUSE

CNS201

CNP201

1

1

2

2

3

3

LCD801
LCD DISPLAY

4

321

R847
1K

SW802
STOP

+

-

+

5

R848

2.2K

SW803
REVIEW/
DOWN

-

6

7

R849

6.8K

SP201
L-CH

4 OHM

SPEAKERS

SP202
R-CH
4 OHM

8

SW804
CUE/UP

D201
1N4148

SW201

+B

FUNCTION
SELECTOR

ZD201

DZ5.1BSB

R202

4.7K

C203

0.01

SW201-D

+B

19

R201

2.2K

C202
47/16

LIZER AMP.

C351

0.0022
(ML)

L301

BIAS OSC.

463

C352
100/10

R

12

SW102-D

11

R351
100

2
1

NC

P

10

SW102
RECORD/
PLAYBACK

C354

0.022(ML)
R352

150

R353
33K

C353

0.0056(ML)

3.32V

0.68V

0V

+B

RECORDING
BIAS OSCILATOR

Q351
KTC3199 GR

R354

4.7

SW201-A
TAPE

AM
FM
CD

SW201
FUNCTION
SELECTOR

2

NC

3
4
5

C204

0.022

Q204
KTA1046 Y
REGULATOR

5.08V

1

D202

1N4148

SWITCHING

R203
560

Q205

9.05V

8.44V

8.44V

KTC3199 GR

4.39V

4.96V

D203
1N4148

• NOTES ON SCHEMATIC DIAGRAM can be found on page 12.

78 9101112

Figure 9 SCHEMATIC DIAGRAM (2/2)

TAPE

23

AM

22

FM

21

CD

20

– 9 –

D651

1N4004

0.022

C651

0.022

D652

1N4004

C654

0.022

D653

1N4004

D654

1N4004

SW601
TAPE
MAIN

M601
TAPE

M

MOTOR

T651

POWER

TRANSFORMER

AC/DC

SO651

AC INLET

SOCKET

AC120V,60Hz

AC INPUT

SELECTOR

C652

CNP602

CNS602

+B

R230

2.7

0.022

1

1

2

2

BATTERY
DC 9V ["D" size (UM/SUM-1,R20 orHP-2)
battery x 6]

C653

+

-

QT-CD210/C

A

B

C

CD CONTROL
PWB-A2

D

SW802

STOP

E

SW801

PLAY/

PAUSE

F

G

H

SP201 SP202

SW803

REVIEW/DOWN

R847

R848

R849

SW804

CUE/UP

SPEAKERS

CNS201

1

1
2
3
4
5
6

LCD801

7
8

10

L3 AM BAR ANTENNA

BK

WH

1 2 3

SW201

FUNCTION

RD

POWER

ON

SELECTOR

OFF

4

FW806

R-CHL-CH

CD

FM

AM

TAPE

VR201-B

R216

VR201

VOLUME

R219

VR201-A

B

SW201

A

1

10

17

OPEN/CLOSE

SW810
CD LID

R220

R215

C

D

CNP201

3 2 1

C216

C218

BK

BK

C217

L801

C215

R458

16

R457

R456

C847

C846

R838

R221

R862

C852

C850

R124

ZD201

R222

R844

13
12

PLAY

RECORD/

PLAYBACK

C105

R121

R119

R123

C202

C203
D203
D202
R203

R455

R837

C851

C849

R835
C848

C844

C853

C855

100

R839

1

R846

SW102

R105

R113

R117

R836

95

5

C824

R104

R861

C121

90

10

REC.

R103

R115

D101

B
C
E

Q205

R860

C845

80

81

75

85

IC802

15

20

R843

C115

C120

R201

C204

X801

25

C825

C832
R840

70

30

R125

C233

65

35

C109

C113

C117

R202

40

31

CNP101
1

AEB

R101

3 5 7 9

1

2

C123

Q204

C235
R231
C219

C221

C222

C840

60

55

45

2

3

F

R107

IC101

R109

4 6

C239

E
C
B

C225

C220

C843

1

4

C

G

R108

C107

C108

C111

C112

11

12

10

8

D102

C122

C226

C237

R832

C833

C830

51
50

R826

C823

R824

R821

BI803

WHGYGYGYGY

R6

R4

L1

R110

12
11
10

13

9
8
7

R812

C827

R102

R126

D201

C854

R828

1

D

H

C110

C227

R827

GY

TC3

C116

C114

C119

IC201

C837

R834
R833

C826

C842

6

F1

2

C2

TC1

VC1

C21

14

R831
R830
R829

C863
C828

C841

VC3

1
2
3

4
5
6

R820

D2

3

C106

R120

R7

R114

C118

C240

C22

R232

C836

VC2

VC4

R116

R118

C241

C3

TC2

R106

R122

C234

C238

C236

R805

C838

R852

R851

C1

TC4

C818

R807

C819

C817

C821

C820

C829

T3

C11

R351

C352

D801

R804

R801

C839

15

10

5

1

1

CNP602

C822

20

R806

C815

L2

1 2

R803

13

C804

C835

16

20

IC803

25

30

R1

1

CF3

R230

15

24

C816

2

C14

5

2024

C351

C354
R352

C813

C814

C801

C802

BC

3

R3

IC1

R2

L301

Q802

IC801

C4

L4

12

E

C834

CF1

3
2
1

C6

10

C12

C
B

5
1

R853

C807

15

R802

10

Q801

C856

C7

Q803

R850

R811

BI802

BI801

C806

C805

C15

12

13

R354

B

EC

Q351

R353

C353

14
15
11

1

1E
2
3

6
9

10

8

BK

1

WH
WH
WH
WH

5

8

WH
WH
WH
WH
WH
WH
WH

BK

1

7
5
2

3

MAIN PWB-A1

COR1

T2

R10

C13

C16

C18
C19

C20

C8

C9

R5

R8

C10

CNS802
1

2
3
4
5

8
7
6
5
4
3
2
1
CNS801

R11

R9

C17

D1

YL

RD
BK

• The numbers 1 to 17 are waveform numbers shown in page 13.

1

2

34 5

Figure 10 WIRING OF P.W.BOARD (1/2)

– 10 –

6