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

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.

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

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

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

DISPLAY

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

12 3 4 5 67

8 9 q; qa qs qd

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

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)

2 3 4

5 6

qd qs

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

Press CLOCK/TIM ER SE T.

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

Do the same procedures as step 3 to 6 above.

Note

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

•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

AM/FM tuner

screw (BVTP3

DC fan

two screws (BVTP3

two claws

two screws (BVTP3

rear cabinet

four screws

(BVTP3

four screws (BVTP3

three screws (BVTP3

CX-LDB10/LDB20

3-3. TOP PANEL ASSY, FRONT PANEL ASSY

connector

(6P)

front panel assy

(17core) (CN003)

connector

(2P)

wire (flat type)

earth wire

screw (BVTP3 × 8)

top panel assy

wire (flat type)

(27core) (CN004)

wire (flat type)

(11core)

two screws (BVTP3 × 8)

3-4. BASE UNIT (BU-K7BD81B)

claw

connector

(3P)(CN101)

wire (flat type)

(23core)

claw

connector

(7P)(CN102)

two vibration proof rubbers (PNK)

screw (BVTP3 × 8)

two earth wires

two screws

two vibration proof rubbers (GRN)

two screws (+PSW2.6

base unit

(BU-K7BD81B)

10)

(+PSW2.6

10)

3-5. MECHANICAL DECK (CMAL5Z220A)

wire (flat type)

(7core)

plate (shield cassette)

CX-LDB10/LDB20

3-6. CONTROL BOARD

knob (VOL)

mechanical deck (CMAL5Z220A)

coating clip

CONTROL board

three screws (BVTP2.6

two earth wires

four screws (BVTP3 × 8)

wire (flat type)

(11core) (CN402)

wire (flat type)

(7core) (CN404)

wire (flat type)

(17core) (CN401)

wire (flat type)

(23core) (CN403)

seven screws (BVTP2.6

CX-LDB10/LDB20

3-7. MAIN BOARD, POWER TRANSFORMER

two sumitite screws (B3)

screw (BVTP3

MAIN board

four screws

holder (pwb PT)

two claws

two tapping screws (B3)

shield cover

3-8. LID (CASSETTE)

connector

(13P)(CN902)

power transformer

Open the lid cassette.

lid cassette

two hooks

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.

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

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

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

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.

CX-LDB10/LDB20

Checking Location:

– CD BOARD (Conductor Side) –

TP (VC)

(RFACO)

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

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

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

OPTICAL PICK-UP

BLOCK

(KSM-213EDP)

LASER DIODE

I-V AMP

M101

(SPINDLE)

D +3.3V

AUTOMATIC

POWER

CONTROL

Q10

CH4OUTF

CH4OUTR

MOTOR/COIL DRIVE

IC251

MOTOR

DRIVE

CH4IN

SUMMING

AMP

FOCUS

ERROR

TRACKING

ERROR AMP

APC LD

AMP

FILTER

CD DSP

IC101 (1/2)

OPIN+

OPIN-

EG IN

RFAC

VCA

2 1

RFACO

45 46

RFACI

ASYI ASYO

DIGITAL

CLV

PROCESSOR

MDP

ASYMMETRY CORRECTOR

100

AC_

SUM

FEO

TEO

OUTVREF

OPOUT

XRST

51 53

FILI

PCO

FILO

CLTV

DIGITAL PLL

TO SERVO AUTO

SEQUENCER

CPU INTERFACE

DATA

CLOCK

XLAT

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

MIDIO

MICK

MICS

MILP

MIACK

PO11/BUCK/AD14

STANDBY

RESET

ERROR

MP3 DECODER

IC301

D/A

DIGITAL

INTERFACE

117 93

C4M

SELECTOR

LRCK

63 66 65

18 14

SBSY/BCKIB

SFSY/LRCKIB

D/A

CONVERTER

BCK

PCMD

SDI0

BCKIA

LRCKIA

XTSL

CLOCK

GENERATOR

LRCKI

BCKI

62 60 61

PCMDI

1128 19

SDO0

XTAO

XTAI

XTACN

AOUT1

AOUT2

77 78

R-CH

X171

16.9344MHz

MAIN

Section

2-AXIS

DEVICE

(TRACKING)

(FOCUS)

M102

(SLED)

21 23

CD DSP

IC101 (2/2)

CH3OUTF

14 13

12 11

CH3OUTR

CH1OUTF CH1OUTR

CH2OUTF CH2OUTR

MOTOR

DRIVE

MUTE

COIL

CH3FIN

CH3RIN

CH1FIN

CH1RIN

CH2FIN

CH2RIN

SFDR

SRDR

4 5

6 7

TFDR

TRDR

FFDR

FRDR

PWM GENERATOR

FOCUS/TRACKING/SLED

S101

(LIMIT)

FEI

TEI

A/D

CONVERTER

FOCUS/

TRACKING/SLED

SERVO DSP

SSTP

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

XTCN

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

• Signal Path : CD PLAY

CX-LDB10/LDB20

1616

+ 36 hidden pages

Aiwa CXLDB-10, CXLDB-20 Service manual

TABLE OF CONTENTS

3-2. REAR CABINET

3-1. DISASSEMBLY FLOW

3-3. TOP PANEL ASSY, FRONT PANEL ASSY

3-4. BASE UNIT (BU-K7BD81B)

3-5. MECHANICAL DECK (CMAL5Z220A)

3-6. CONTROL BOARD

3-7. MAIN BOARD, POWER TRANSFORMER

3-8. LID (CASSETTE)

7-1. BLOCK DIAGRAM — CD SECTION —