Aiwa CXLDB-10, CXLDB-20 Service manual

CX-LDB10/LDB20

SERVICE MANUAL

Ver. 1.0 2005.03

CX-LDB10/LDB20 are the Amplifier, CD player,
Tape Deck and T uner section in XR-DB10/DB20.

Photo : CX-LDB20

CD
Section

Tape deck Model Name Using Similar Mechanism HCD-NE5
Section T ape Transport Mechanism Type CMAL5Z220A

AEP Model

E Model

CX-LDB10/LDB20

Australian Model

CX-LDB10

Model Name Using Similar Mechanism HCD-NE5
Base Unit Name BU-K7BD81B
Optical Pick-up Name KSM-213EDP/C2NP

Amplifier section

CX-LDB20

DIN power output (rated): 35 + 35 W

(6 ohms at 1 kHz, DIN)

Continuous RMS power output (reference):

40 + 40 W
(6 ohms at 1 kHz, 10%
THD)

Music power output (reference):

62 + 62 W
Inputs
AUDIO IN: Sensitivity 700 mV,

impedance 47 kilohms
Outputs
PHONES: Accepts headphones with

an impedance of 8 ohms or

more
SPEAKER: Accepts impedance of 6 to

16 ohms.

CX-LDB10

DIN power output (rated): 20 + 20 W

(6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference):

22.5 + 22.5 W

(6 ohms at 1 kHz, 10%

THD)
Music power output (reference):

38 + 38 W

SPECIFICATIONS

Inputs
AUDIO IN: Sensitivity 700 mV,

impedance 47 kilohms
Outputs
PHONES: Accepts headphones with

an impedance of 8 ohms or

more
SPEAKER: Accepts impedance of 6 to

16 ohms.

CD player section

Laser Diode Properties Emission duration:

continuous

Laser Output*: Less than

44.6 µW

*This output is the value measurement at a distance of

200 mm from the objective lens surface on the
Optical Pick-up Block with 7 mm apert u re)

Frequency response 20 Hz – 20 kHz

Tape deck section

Recording system 4-track 2-channel, stereo
Frequency response 50 – 13,000 Hz (±3 dB),

using Sony TYPE I

cassettes

Tuner section

FM stereo, FM/AM superhe te rodyne tuner

FM tuner section

Tuning range 87.5 – 108.0 MHz
Antenna FM lead antenna
Antenna terminals 75 ohms unbalanced
Intermediate frequency 10. 7 MHz

AM tuner section

Pan-American model: 530 – 1,710 kHz

(with the tuning interval
set at 10 kHz)
531 – 1,710 kHz
(with the tuning interval
set at 9 kHz)

European model: 531 – 1,602 kHz

(with the tuning interval
set at 9 kHz)

Other models: 530 – 1,710 kHz

(with the tuning interval
set at 10 kHz)
531 – 1,602 kHz
(with the tuning interval
set at 9 kHz)

Antenna AM loop ante nna, extern al

antenna terminal

Intermediate frequency 450 kHz

— Continued on next page —

9-879-549-01

2005C1678-1
© 2005.03

MICRO HI-FI COMPONENT SYSTEM

Sony Corporation

Personal Audio Group
Published by Sony Engineering Corporation

CX-LDB10/LDB20

General

Power requirements
European model: AC 230 V, 50/60 Hz
Korean model: AC 220 V, 60 Hz
Australian model: AC 230 – 240 V, 50/60 Hz
Mexican model: AC 120 V, 60 Hz
Argentine model: AC 220 V, 50/60 Hz
Other models: AC 110 – 120 V or

220 – 240 V, 50/60 Hz
Adjustable with voltage
selector

Power consumption
CX-LDB20: 95 W

0.3 W (in Power Saving
Mode)

CX-LDB10: 65 W

0.3 W (in Power Saving
Mode)

Dimensions (w/h/d) excl. speakers

Approx. 160 × 230 ×
255 mm

Mass excl. speakers
CX-LDB20: Approx. 4.0 kg
CX-LDB10: Approx. 3.8 kg

Design and specifications are subject to change
without notice.

Notes on chip component replacement

• Never reuse a disconnected chip component.

• Notice that the minus side of a tantalum capacitor may be

damaged by heat.

Flexible Circuit Board Repairing

• Keep the temperature of the soldering iron around 270 °C
during repairing.

• Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).

• Be careful not to apply force on the conductor when soldering
or unsoldering.

CAUTION

Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous radiation
exposure.

This appliance is
classified as a CLASS 1
LASER product. This
label is located on the
rear exterior.

UNLEADED SOLDER

Boards requiring use of unleaded solder are printed with the lead­free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with

the lead free mark due to their particular size)

: LEAD FREE MARK

Unleaded solder has the following characteristics.

• Unleaded solder melts at a temperature about 40 °C higher
than ordinary solder.
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
about 350 °C.
Caution: The printed pattern (copper foil) may peel away if

the heated tip is applied for too long, so be careful!

• Strong viscosity
Unleaded solder is more viscou-s (sticky, less prone to flow)
than ordinary solder so use caution not to let solder bridges
occur such as on IC pins, etc.

• Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE
WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN
THE PARTS LIST ARE CRITICAL TO SAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE
PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR
IN SUPPLEMENTS PUBLISHED BY SONY.

2

TABLE OF CONTENTS

CX-LDB10/LDB20

1. SERVICING NOTES ................................................ 4

2. GENERAL ................................................................... 5

3. DISASSEMBLY

3-1. Disassembly Flow ........................................................... 7

3-2. Rear Cabinet .................................................................... 7

3-3. Top Panel Assy, Front Panel Assy ................................... 8

3-4. Base Unit (BU-K7BD81B) ............................................. 8

3-5. Mechanical Deck (CMAL5Z220A) ................................ 9

3-6. CONTROL Board ........................................................... 9

3-7. MAIN Board, Power Transformer................................... 10

3-8. Lid (Cassette) ................................................................. 10

4. TEST MODE ............................................................... 11

5. MECHANICAL ADJUSTMENTS......................... 12

6. ELECTRICAL ADJUSTMENTS .......................... 12

7. DIAGRAMS................................................................. 15

7-1. Block Diagram — CD Section — .................................. 16

7-2. Block Diagram — MAIN Section — ............................. 17

7-3. Printed Wiring Board — CD Board — .......................... 18

7-4. Schematic Diagram — CD Board — ............................. 19

7-5. Printed Wiring Board — MAIN Section (1/2) — .......... 20

7-6. Printed Wiring Board — MAIN Section (2/2) — .......... 21

7-7. Schematic Diagram — MAIN Section (1/3) — ............. 22

7-8. Schematic Diagram — MAIN Section (2/3) — ............. 23

7-9. Schematic Diagram — MAIN Section (3/3) — ............. 24

7-10. Printed Wiring Board — CONTROL Board (1/2) — .... 25

7-11. Printed Wiring Board — CONTROL Board (2/2) — .... 26

7-12. Schematic Diagram — CONTROL Board —................ 27

7-13. Printed Wiring Board — POWER Board — .................. 28

7-14. Schematic Diagram — POWER Board —..................... 29

7-15. Printed Wiring Board — AUX Section — ..................... 30

7-16. Schematic Diagram — AUX Section — ........................ 30

8. EXPLODED VIEWS

8-1. Overall Section ................................................................ 36

8-2. Front Panel Section ......................................................... 37

8-3. Chassis Section ................................................................ 38

8-4. Top Panel Assy ................................................................ 39

9. ELECTRICAL PARTS LIST .................................. 40

3

CX-LDB10/LDB20

SECTION 1

SERVICING NOTES

NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT

The laser diode in the optical pick-up block may suffer electrostatic
break-down because of the potential difference generated by the
charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic break-down and also
use the procedure in the printed matter which is included in the
repair parts.
The flexible board is easily damaged and should be handled with
care.

NOTES ON LASER DIODE EMISSION CHECK

The laser beam on this model is concentrated so as to be focused on
the disc reflective surface by the objective lens in the optical pick­up block. Therefore, when checking the laser diode emission,
observe from more than 30 cm away from the objective lens.

LASER DIODE AND FOCUS SEARCH OPERATION
CHECK

Carry out the “S curve check” in “CD section adjustment” and check
that the S curve waveforms is output three times.

MODEL IDENTIFICATION
– Back Panel –

Power voltage
indication

Model Name Power Voltage Indication

Mexican model 120 V AC, 60 Hz
AEP, Russian models 230 V AC, 50/60 Hz
Korean model 220 V A C, 50/60 Hz
Australian model 230 – 240 V AC, 50/60 Hz
Other models
(E51, Singapore, Malaysia and
Argentine models)

110 – 120 V or

220 – 240 V AC, 50/60Hz

4

SECTION 2

GENERAL

List of button locations and reference pages

CX-LDB10/LDB20

This section is extracted
from instruction manual.

How to use this page

Use this page to find the location of buttons and other
parts of the system that are mentioned in the text.

Main unit

ALPHABETICAL ORDER

A – H

AUDIO IN 8 (16, 22)
AUDIO IN jack qg (18, 22)
BASS/TREBLE q; (17)
Cassette compartment qj
CD SYNC wa (16)
DISPLAY 9 (14, 20)
Display window 5
FOLDER +/– qk (10, 11, 16)

I – Z

i-Bass 6 (17)
OPEN (CD open/close) 7 (10)
PHONES jack qh
Remote sensor 2
STANDBY indicator ws (20, 23)
TUNER/BAND qa (12, 13)
TUNING +/– qd (12, 13, 17)
VOLUME 4 (18, 22, 23, 25)

Illustration number

r

DISPLAY

RR

Name of button/part Reference page

9 (14, 20)

BUTTON DESCRIPTIONS

?/1 (power) 1 (7, 18, 19, 25)
z REC PAUSE/START 3 (16)
x (stop) qs (10, 16, 25)
.m/M> (skip back/

skip forward, rewind/fast
forward) qd (10, 11, 15)

Z PUSH OPEN (tape open/close)

qf (15)
TAPE/N (play) ql (15)
CD/NX (play/pause) w; (10,

11, 24)

ws
wa

w;
ql

qk

qj

qh

12 3 4 5 67

8
9
q;
qa
qs
qd

qf

qg

5

CX-LDB10/LDB20

Remote control

ALPHABETICAL ORDER

A – O P – Z

CD qh (9, 11)
CLEAR qd (11)
CLOCK/TIMER SELECT 2

(18, 19, 23)

CLOCK/TIMER SET 3 (8, 18,

19)
DISPLAY ql (14, 20)
ENTER 9 (8, 11, 12, 18, 19)
EQ qs (17)
FM MODE 4 (14, 24)
FOLDER +/– qa (10, 11, 16)
FUNCTION 6 (22, 25)

PLAY MODE qk (9, 11, 24)
REPEAT 4 (10)
SLEEP w; (17)
TAPE qg (15)
TUNER/BAND 5 (12, 13)
TUNER MEMORY qj (12)
TUNING MODE qk (12, 13)
VOLUME +/– 0 (18, 23)

ql
qk
qj
qh
qg

qf

w;

BUTTON DESCRIPTIONS

?/1 (power) 1 (7, 18, 19, 25)
m/M (rewind/fast forward)

7 (10, 15)

x (stop) 8 (10, 16, 25)
X (pause) 8 (10, 15)
N (play) 8 (9, 11, 19)

+/– (tuning) qf (12, 13)
./> (go back/go forward)

qf (8, 10, 11, 18, 19)

1

2
3
4

5
6

7

qd
qs

qa

8

9
0

Setting the clock

Use buttons on the r emote for the operation.

1 Press ?/1 to turn on the system.
2 Press CLOCK/TIMER SET.
3 Press . or > repeatedly to set the

hour.

4 Press ENTER.
5 Press . or > repeatedly to set the

minute.

6 Press ENTER.

The clock starts working.

To adjust the clock

1

Press CLOCK/TIM ER SE T.

2

Press . or > until “CLOCK” appears,
then press ENTER.

3

Do the same procedures as step 3 to 6
above.

Note

The clock is not displayed in Power Saving Mode
(page 20).

6

•This set can be disassembled in the order shown below.

3-2. REAR CABINET

(Page 7)

3-8. LID (CASSETTE)

(Page 10)

3-5. MECHANICAL DECK

(CMAL5Z220A)
(Page 9)

3-7. MAIN BOARD,

POWER TRANSFORMER
(Page 10)

3-6. CONTROL BOARD

(Page 9)

3-4. BASE UNIT

(BU-K7BD81B)
(Page 8)

3-3. TOP PANEL ASSY,

FRONT PANEL ASSY
(Page 8)

SET

3-1. DISASSEMBLY FLOW

CX-LDB10/LDB20

SECTION 3

DISASSEMBLY

Note: Follow the disassembly procedure in the numerical order given.

3-2. REAR CABINET

qa

AM/FM tuner

0

screw
(BVTP3

8

DC fan

6

two screws
(BVTP3

7

two claws

×

8)

5

two screws
(BVTP3

×

8)

×

8)

9

rear cabinet

2

four screws

×

(BVTP3

4

four screws
(BVTP3

8)

×

8)

1

four screws
(BVTP3

×

3

three screws
(BVTP3

8)

×

8)

7

CX-LDB10/LDB20

3-3. TOP PANEL ASSY, FRONT PANEL ASSY

1

qd

connector

(6P)

qj

front panel assy

7

(17core) (CN003)

connector

(2P)

wire (flat type)

qs

qa

earth wire

screw
(BVTP3 × 8)

3

top panel assy

2

wire (flat type)

(27core) (CN004)

4

wire (flat type)

(11core)

qf

two screws
(BVTP3 × 8)

3-4. BASE UNIT (BU-K7BD81B)

qh

claw

9

connector

(3P)(CN101)

q;

wire (flat type)

(23core)

qg

claw

8

connector

(7P)(CN102)

3

two vibration proof rubbers (PNK)

6

5

screw
(BVTP3 × 8)

two earth wires

1

two screws

4

two vibration proof rubbers (GRN)

2

two screws
(+PSW2.6

5

base unit

(BU-K7BD81B)

×

10)

(+PSW2.6

×

10)

8

3-5. MECHANICAL DECK (CMAL5Z220A)

1

wire (flat type)

(7core)

5

plate (shield cassette)

CX-LDB10/LDB20

3-6. CONTROL BOARD

1

knob (VOL)

6

mechanical deck (CMAL5Z220A)

3

coating clip

8

CONTROL board

2

three screws
(BVTP2.6

4

two earth wires

×

8)

2

four screws
(BVTP3 × 8)

7

wire (flat type)

(11core) (CN402)

6

wire (flat type)

(7core) (CN404)

4

wire (flat type)

(17core) (CN401)

5

wire (flat type)

(23core) (CN403)

3

seven screws
(BVTP2.6

×

8)

9

CX-LDB10/LDB20

3-7. MAIN BOARD, POWER TRANSFORMER

3

two sumitite screws
(B3)

9

2

screw
(BVTP3

4

MAIN board

×

8)

8

four screws

holder (pwb PT)

7

two claws

5

two tapping screws (B3)

6

shield cover

3-8. LID (CASSETTE)

1

connector

(13P)(CN902)

q;

power transformer

10

1

Open the lid cassette.

3

lid cassette

two hooks

2

2

claw

SECTION 4

TEST MODE

CX-LDB10/LDB20

COLD RESET

• The cold reset clears all data including preset data stored in
the RAM to initial conditions. Execute this mode when
returning the set to the customers.

Procedure:

1. Press the ?/1 button to turn the set ON.

2. Press three buttons x , ?/1 and [VOLUME] down simulta­neously.

3. The message “RESET” is displayed and the set is reset.

TUNER STEP CHANGE

•A step of AM channels can be changed over between 9 kHz
and 10 kHz.

Procedure:

1. Press the ?/1 button to turn the set ON.

2. Select the function “TUNER”, and press [TUNER/BAND]
button to select the BAND “AM”.

3. Press the ?/1 button to turn the set OFF.

4. Press the > and ?/1 buttons simultaneously, and thus
the channel step is changed over.

SHIP RESET

Procedure:

1. Press the ?/1 button to turn the set ON.

2. Press the CD u button to select “CD”

3. Remove the disc.

4. The message “NO DISC” is displayed.

5. Press three buttons x , CD u and [VOLUME] down si-
multaneously.

6. The message “SHIP RESET” is displayed and the set is reset.
The CD function is activated.

7. To e xit from this mode, press the ?/1 button and pull out the
AC plug.

CD Repeat 5 Times Limit Release Mode

Procedure:

1. Press the ?/1 button to turn the set ON.

2. Set the function to “CD”.

3. Press three buttons x , H , and [VOLUME] down simulta-
neously.

4. The repeat all mark blinks and then repeat 5 times limit is
released.

PANEL TEST MODE

•This mode is used to check the software version, LCD, LED
and keyboard.

Procedure:

1. Press the ?/1 button to turn the set ON.

2. Press the CD u button to select “CD”

3. Press three bottons [DISPLAY] , ?/1 and [VOLUME] down
simultaneously.

4. When the panel test mode is activated, all segments are turned
on.

VERSION DISPLAY

•This mode is used check the model, destination, software
version.

Procedure:

1. When the panel test mode is activated, press the button
[BASS/TREBLE], the model and destination are displayed.

KEY TEST MODE

Procedure:

1. When the panel test mode is activated, press the H button,
to select the key test mode.

2. To enter the KEY test mode, the fluorescent indicator displays
“K0 VO”. Each time a button is pressed, “KEY” value
increases. However, once a button is pressed, it is no longer
taken into account. When all keys are pressed correctly, “K15
VO” is displayed.

3. To exit from this mode, pull out the AC plug.

11

CX-LDB10/LDB20

)

SECTION 5

MECHANICAL ADJUSTMENTS

SECTION 6

ELECTRICAL ADJUSTMENTS

TAPE MECHANISM DECK SECTION

Precaution

1. Clean the following parts with a denatured alcohol-moistened
swab:

record/playback heads pinch rollers
erase head rubber belts
capstan idlers

2. Demagnetize the record/playback head with a head
demagnetizer.

3. Do not use a magnetized screwdriver for the adjustments.

4. After the adjustments, apply suitable locking compound to
the parts adjusted.

5. The adjustments should be performed with the rated power
supply voltage unless otherwise noted.

Torque Measurement

Mode Torque meter Meter reading

2.94 mN • m to 7.84 mN • m

FWD CQ-102C 31 to 71 g • cm

(0.43 – 0.98 oz • inch)

FWD
back tension

FF/REW CQ-201B 71 to 143 g • cm

FWD tension CQ-403A 100 g or more

CQ-102C 2 to 6 g • cm

0.14 mN • m to 0.59 mN • m

(0.02 – 0.08 oz • inch)

6.86 mN • m to 17.64 mN • m

(0.98 – 1.99 oz • inch)

more than 0.98 N • m

(3.53 oz or more)

DECK SECTION 0 dB = 0.775 V

Precaution

1. Demagnetize the record/playback head with a head
demagnetizer.

2. Do not use a magnetized screwdriver for the adjustments.

3. After the adjustments, apply suitable locking compound to
the parts adjust.

4. The adjustments should be performed with the rated power
supply voltage unless otherwise noted.

5. The adjustments should be performed in the order given in
this service manual. (As a general rule, playback circuit
adjustment should be completed before performing recording
circuit adjustment.)

6. The adjustments should be performed for both L-CH and R­CH.

7. Switches and controls should be set as follows unless otherwise
specified.

Test T ape

Tape Signal Used for

P-4-A100 10 kHz, –10 dB Azimuth Adjustment

WS-48B 3 kHz, 0 dB Tape Speed Check

Record/Playback Head Azimuth Adjustment

Procedure:

1. Mode: Playback

test tape
P-4-A100
(10 kHz, – 10 dB)

MAIN board
SPEAKER terminal (J302
L-CH, R-CH

level meter

set

+
–

2. Turn the adjustment screw and check output peaks. If the peaks
do not match for L-CH and R-CH, turn the adjustment screw
so that outputs match within 1dB of peak.

Output
level

within
1dB

L-CH
peak

R-CH
peak

within
1dB

Screw
position

L-CH
peak

Screw
position

R-CH
peak

12

CX-LDB10/LDB20

+
–

CD board

TP (RFACO)
TP (VC)

oscilloscope

(DC range)

3. Mode: Playback

MAIN board
test tape
P-4-A100
(10 kHz, – 10 dB)

L-CH

set

R-CH

in phase 45°90°135°180

SPEAKER terminal (J302)

L-CH

R-CH

waveform of oscilloscope

good

oscilloscope

wrong

H

V

°

4. After the adjustments, apply suitable locking compound to
the parts adjusted.

Adjustment Location:Record/Playback/Erase Head

Tape Speed Check

Mode: Playback

test tape
WS-48B
(3 kHz, 0 dB)

set

MAIN board
SPEAKER terminal (J302)
L-CH, R-CH

frequency counter

+
–

CD SECTION

Note:

1. CD Block is basically constructed to operate without
adjustment.

2. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.

3. Use an oscilloscope with more than 10 MΩ impedance.

4. Clean the object lens by an applicator with neutral detergent
when the signal level is low than specified value with the
following checks.

5. Check the focus bias check when optical block is replaced.

FOCUS BIAS CHECK

Adjustment and Connecting Location: CD board (See page 14)

Procedure :

1. Connect the oscilloscope to TP (RF ACO) and TP (VC) on the
CD board.

2. Insert the disc (YEDS-18). (Part No. : 3-702-101-01)

3. Press the [CD ] button.

4. Confirm that the oscilloscope waveform is as shown in the
figure below. (eye pattern)
A good eye pattern means that the diamond shape (◊) in the
center of the waveform can be clearly distinguished.

• RF signal reference waveform (eye pattern)

VOLT/DIV: 0.2 V (with the 10: 1 probe in use.)
TIME/DIV: 500 ns

NX

1. Insert the WS-48B into the deck.

2. Press the H button on the deck.

3. Confirm that the frequency counter reads 3,000 ± 90 Hz.

Sample value of Wow and Flutter: 0.3% or less W.RMS (JIS)

(WS-48B)

1.1

0.2 Vp-p

When observing the eye pattern, set the oscilloscope
for AC range and raise vertical sensitivity.

13

CX-LDB10/LDB20

Checking Location:

– CD BOARD (Conductor Side) –

TP (VC)

TP

(RFACO)

14

SECTION 7

DIAGRAMS

CX-LDB10/LDB20

THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)

For Schematic Diagrams.
Note:

• All capacitors are in µF unless otherwise noted. (p: pF).
50 WV or less are not indicated except f or electrolytics and
tantalums.

• All resistors are in Ω and 1/
specified.

• f : internal component.

• C : panel designation.
Note: The components identified by mark 0 or dotted

line with mark 0 are critical for safety.
Replace only with part number specified.

• A : B+ Line.

• B : B– Line.

• H : adjustment for repair.

•Voltages and waveforms are dc with respect to ground un­der no-signal (detuned) conditions.
no mark: CD STOP

•Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal production
tolerances.

•Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal production
tolerances.

• Circled numbers refer to waveforms.

• Signal path.

F : TUNER
J : CD PLAY
E : T APE PLAY
j : TAPE REC
f : AUX IN

•Abbreviation
AUS: Australian model
AR : Argentine model
E51 : Chilean and peruvian models
KR : Korea model
MX : Mexican model
MY : Malaysia model
RU : Russian model
SP : Singapore model

4

W or less unless otherwise

For Printed Wiring Boards.
Note:

• X : parts extracted from the component side.

• Y : parts extracted from the conductor side.

• W : indicates side identified with part number.

• f : internal component.

• : Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)

Caution:
Pattern face side : Parts on the pattern face side seen from
(Conductor side) the pattern face are indicated.
Parts face side : Parts on the parts face side seen from
(Component side) the parts face are indicated.

• Indication of transistor.

C
Q

B

E

B

These are omitted.

Q

CE

These are omitted.

• Circuit Boards Location

MAIN board

CD board

CONTROL board

POWER (1) board

HEADPHONE board

TUNER unit

POWER (2) board

AUX board

CX-LDB10/LDB20

1515

CX-LDB10/LDB20

7-1. BLOCK DIAGRAM — CD SECTION —

DETECTOR

A

B

C

D

F

E

OPTICAL PICK-UP

BLOCK

(KSM-213EDP)

LASER DIODE

PD

I-V AMP

LD

VC

M101

(SPINDLE)

M

D +3.3V

AUTOMATIC

POWER

CONTROL

Q10

CH4OUTF

16

CH4OUTR

15

A

26

B

27

C

28

D

29

F

20

E

19

LD

36

MOTOR/COIL DRIVE

IC251

MOTOR

DRIVE

CH4IN

SUMMING

AMP

FOCUS

ERROR

TRACKING

ERROR AMP

APC LD

AMP

24

RF

AMP

VC

FILTER

CD DSP

IC101 (1/2)

OPIN+

OPIN-

EG
IN

RFAC

35

VCA

26

2
1

RFACO

EQ

41

42

45
46

RFACI

ASYI
ASYO

DIGITAL

CLV

PROCESSOR

MDP

6

ASYMMETRY
CORRECTOR

100

AC_

SUM

34

FEO

24

TEO

22

VC

25

PD

37

OUTVREF

OPOUT

27

XRST

51 53

FILI

PCO

FILO

CLTV

DIGITAL PLL

TO SERVO AUTO

SEQUENCER

CPU INTERFACE

DATA

CLOCK

XLAT

27

29 100

XLT

CD-CLK

CD DATA

1125052

XPCK

DEMODULATOR

SUBCODE

PROCESSOR

SQSO

EXCK

SCOR

SENS

SBSO

96 97

98 99115107102 105 104 110 111

SCOR

MI-DIO-I

MI-DIO-O

MP3-REQ
MP3-STB
MP3-RST

SENS

EFM

SQCK

MI-CK
MI-CS
MI-LP

MI-ACK

32K

RAM

INTERNAL BUS

WFCK

XUGF

GFS

113

25
26
24

4
5
1
3
6
2

CORRECTOR

EMPH

68

MIDIO

6

MICK

7

MICS

4

MILP

5

MIACK

8

PO11/BUCK/AD14

36

STANDBY

3

RESET

2

ERROR

MP3 DECODER

IC301

D/A

DIGITAL

INTERFACE

117 93

C4M

SELECTOR

LRCK

63 66 65

16

19

18 14

SBSY/BCKIB

SFSY/LRCKIB

D/A

CONVERTER

BCK

PCMD

15

SDI0

BCKIA

LRCKIA

XTSL

CLOCK

GENERATOR

LRCKI

BCKI

62 60 61

PCMDI

1128 19

SDO0

XTAO

XTAI

XTACN

AOUT1

AOUT2

77
78

95

81

86

R-CH

X171

16.9344MHz

CD

MAIN

A

Section

2-AXIS

DEVICE

(TRACKING)

(FOCUS)

M102

(SLED)

21 23

CD DSP

IC101 (2/2)

CH3OUTF

17

M

18

14
13

12
11

CH3OUTR

CH1OUTF
CH1OUTR

CH2OUTF
CH2OUTR

MOTOR

DRIVE

DRIVE

DRIVE

MUTE

COIL

COIL

20

CH3FIN

CH3RIN

CH1FIN

CH1RIN

CH2FIN

CH2RIN

23

22

SFDR

9

SRDR

10

4
5

6
7

TFDR

11

TRDR

12

FFDR

13

FRDR

14

PWM GENERATOR

FOCUS/TRACKING/SLED

S101

(LIMIT)

FEI

TEI

A/D

CONVERTER

FOCUS/

TRACKING/SLED

SERVO DSP

SSTP

7

MIRR,
DFCT, FOK
DETECTOR

SERVO

INTERFACE

SERVO AUTO

SEQUENCER

TO CPU INTERFACE

FOK
MIRR
DFCT

COUT
SCLK

SYSTEM CONTROLLER

IC401 (1/2)

3
1
2

119
108

X-RST

95

XTCN

94

• R-ch is omitted due to same as L-ch.

• Signal Path
: CD PLAY

CX-LDB10/LDB20

1616