Sharp CDC-1821-V Service manual

NTSC/PAL

CD-C1831V

SERVICE MANUAL

No. S9955CDC1831V

CD-C1831V

CD-C1831V Video CD Mini System consisting of CD-C1831V (main unit), CP-C1831 (front speaker) and GBOXS0025AWM1 (surround speaker).

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

CONTENTS

Page

SAFETY PRECAUTION FOR SERVICE MANUAL ........................................................................................................... 2

VOLTAGE SELECTION..................................................................................................................................................... 2

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

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

OPERATION MANUAL ...................................................................................................................................................... 6

DISASSEMBLY.................................................................................................................................................................. 7

REMOVING AND REINSTALLING THE MAIN PARTS..................................................................................................... 9

ADJUSTMENT ................................................................................................................................................................. 10

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

BLOCK DIAGRAM ........................................................................................................................................................... 13

SCHEMATIC DIAGRAM / WIRING SIDE OF P.W.BOARD..............................................................................................16

VOLTAGE ........................................................................................................................................................................ 36

WAVEFORMS OF CD CIRCUIT...................................................................................................................................... 37

TROUBLESHOOTING (CD SECTION) ........................................................................................................................... 38

FUNCTION TABLE OF IC................................................................................................................................................ 43

FL DISPLAY......................................................................................................................................................................56

PARTS GUIDE/EXPLODED VIEW

SHARP CORPORATION

– 1 –

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

CD-C1831V

SAFETY PRECAUTION FOR SERVICE MANUAL

WARNINGS

THE AEL (ACCESSIBLE EMISSION 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 OBSERVED DURING SERVICING TO PROTECT YOUR EYES AGAINST EXPOSURE TO THE LASER BEAM.

1-WHEN THE CABINET IS REMOVED, THE POWER IS TURNED ON WITDOUT 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 PERFORMANCE OF PROCEDURES OTHER THAN THOSE

SPECIFIED HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE.

CAUTION

This Video CD Mini System is classified as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT label is located on the rear cover. Use of controls, adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.

As the laser beam used in this compact disc player is harmful to the eyes, do not attempt to disassemble the cabinet. Refer servicing to qualified personnel only.

Laser Diode Properties

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

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.

VARO ! Avattaessa ja suojalukitus ohitettaessa olet alttiina näkymättömälle lasersäteilylle. Älä katso säteeseen. VARNING! Osynlig laserstralning när denna del är öppnad och spärren är urkopplad. Betrakta ej strälen.

VOLTAGE SELECTION

The voltage selector is located on the AC voltage selector box. If adjustment is necessary, use a screwdriver in order to turn the selector in either direction until the correct voltage figure is displayed in the window next to the adjustment screw.

QACCB0008AW00

92LCoRDZ1652A

92LCoRD577B

Figure 2 AC POWER SUPPLY CORD AND AC PLUG ADAPTOR

QACCE0007AW00

92LPLUG027

– 2 –

92LPLUG155A

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

SPECIFICATIONS

CD-C1831V

General

Power source: AC 110/127/220/230-240 V,

50/60 Hz

Power consumption: 89 W

Dimensions: Width; 270 mm (10-5/8")

Height; 300 mm (11-13/16") Depth; 351 mm (13-13/16")

Weight: 6.4 kg (14.1 lbs.)

Amplifier section

Output power: MPO; 144 W (72 W + 72 W)

(10 % T.H.D.) RMS; 80 W (40 W + 40 W) (10 % T.H.D.) RMS; 66 W (33 W + 33 W) (0.9 % T.H.D.)

Input terminals: Video/Auxiliary (audio signal);

500 mV/47 kohms

Output terminals: Front speakers; 6 ohms

Surround Speakers; 16 ohms Headphones; 16-50 ohms (recommended; 32 ohms) Video out; 1 Vp-p (75 ohms)

Compact disc player section

Type: 3-disc multi-play compact disc

player

Signal readout: Non-contact, 3-beam semi-

conductor laser pickup

D/A Converter: 1-bit D/A converter

Frequency response: 20 - 20,000 Hz

Dynamic range: 90 dB (1 kHz)

Video CD section

Video output format: PAL/PAL60/NTSC

Tuner section

Frequency range: FM; 88 - 108 MHz

AM; 531 - 1,602 kHz

CD-C1831V

Cassette deck section

Type: Compact cassette tape Frequency response: 50 - 14,000 Hz (Normal tape) Motor: DC motor with electronic

governor x 1

Signal/noise ratio: 55 dB (TAPE 1, playback)

50 dB (TAPE 2, recording/

playback)

Bias and erasure system: AC Tape speed: 4.76 cm/sec. (1-7/8 ips.) Wow and flutter: 0.15 % (WRMS) Heads: TAPE-1: Playback x 1

TAPE-2: Record/Playback x 1

Erase x 1

CP-C1831

Front speaker section

Type: 2-way [13 cm (5-1/4") woofer

and 5 cm (2") tweeter]

Maximum input power: 60 W Rated input power: 30 W Impedance: 6 ohms Dimensions: Width; 220 mm (8-11/16")

Height; 300 mm (11-13/16") Depth; 217 mm (8-9/16")

Weight: 2.6 kg (5.7 lbs.)/each

GBOXS0025AWM1

Surround speaker section

Type: 10 cm (4") full range speaker Maximum input power: 20 W Rated input power: 10 W Impedance: 16 ohms Dimensions: Width; 170 mm (6-3/4")

Height; 170 mm (6-3/4") Depth; 88 mm (3-1/2")

Weight: 0.4 kg (0.9 lbs.)/each

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

– 3 –

123 45

6 7 8

9 10 11

12 13 14 15 16

1817

41 42

19

33 34 35 36 37 38 39 40

20 21 22 23

24 25 26 27 28 29

30 31 32

123 45

CD-C1831V

Front Panel

1. Disc Number Selector Buttons

2. Disc Tray

3. Multi Indicator

4. Disc Skip Button

5. Open/Close Button

6. Extra Bass Indicator

7. FM Stereo Mode Indicator

8. FM Stereo Indicator

9. (VCD/CD) Repeat Indicator

10. (VCD/CD) Play Indicator

11. (VCD/CD) Pause Indicator

12. (VCD/CD) Disc Number Indicators

13. (VCD/CD/TUNER) Memory Indicator

14. Timer Play Indicator

15. Timer Record Indicator

16. Sleep Indicator

17. Spectrum Analyzer/Volume Level Indicator

18. (TAPE 2) Racord Indicator

19. Timer Set Indicator

20. (VCD) Digest Button

21. (VCD) Book Mark Button

22. (VCD) Skip/Previous Button (CD) Track Down/Review Button (TUNER) Preset Down Button (TAPE 2) Rewind Button

23. (VCD) Skip/Next Button (CD) Track Up/Cue Button (TUNER) Preset Up Button (TAPE 2) Fast Forward Button

24. Timer/Sleep Button

25. Clock Button

26. (VCD) Playback Control Auto/Off Button

27. (VCD/CD) Audio Mode Button

28. (VCD) On Screen Display On/Off Button

29. On/Stand-by Button

30. Equalizer Mode Selector Button

31. Dimmer Button

32. Extra Bass/Demo Mode Button

33. Headphone Socket

34. Function Selector Button

35. (TAPE 2) Record Pause Button

36. Memory/Set Button

37. (VCD) Stop/Return Button (CD/TAPE) Stop Button

38. (VCD) Play/Repeat/Select/Resume Button (CD) Play/Repeat Button (TAPE) Play Button

39. Tuning and Time Up/Down Buttons

40. Volume Up/Down Button

41. (TAPE 1) Cassette Compartment

42. (TAPE 2) Cassette Compartment

NAMES OF PARTS

– 4 –

Rear Panel

1 2

3

4

5

6

1. Video Output Socket

2. AC Voltage Selector

3. AC Power Input Socket

4. AM Aerial Terminal

5. Aerial Earth Terminal

6. FM 75 Ohms Aerial Terminal

7. Video/Auxiliary (Audio Signal) Input Sockets

8. Surround Speaker Terminals

9. Front Speaker Terminals

1

CD-C1831V

4 5

6 7

CP-C1831

Front Speaker

1. Tweeter

2. Woofer

3. Bass Reflex Ducts

4. Speaker Wire

GBOXS0025AWM1

Surround Speaker

5. Full-Range Speaker

6. Speaker Wire

Remote Control

1. Remote Control Transmitter LED

2. (VCD/CD) Direct Search Buttons

3. (VCD) On Screen Display On/Off Button

4. (VCD) PAL/NTSC Select Button

5. (VCD) Book Mark Button

6. (VCD) Digest/Time Search Button

7. (VCD/CD) Audio Mode Button

8. (VCD) VCD Auto/On Button

9. (VCD) Playback Control Auto/Off Button

10. (VCD/CD) Clear Button

11. (VCD/CD) Memory Button

12. (VCD/CD) Disc Skip Button

13. (VCD/CD) Random Button

14. (VCD/CD) Pause Button

15. (TAPE2) Record Pause Button

16. (VCD) Skip/Previous Button (CD) Track Down/Review Button (TUNER) Preset Down Button (TAPE2) Rewind Button

17. (VCD) Skip/Next Button (CD) Track Up/Cue Button (TUNER) Preset Up Button (TAPE2) Fast Forward Button

18. (VCD) Stop/Return Button (CD/TAPE) Stop Button

19. (VCD) Play/Repeat/Select/Resume Button

(CD) Play/Repeat Button (TAPE) Play Button

20. Function Selector Buttons

21. On/Stand-by Button

22. Equalizer Mode Selector/Extra Bass Button

23. Volume Up/Down Buttons

2 3

2

3 4 5 6

20 21 22

8 9

1

7 8

9 10 11

15161417131812

19

23

– 5 –

CD-C1831V

SETTING THE CLOCK

In this example, the clock is set for the 24-hour (0:00) system.

1

Press the ON/STAND-BY button to enter the stand-by mode.

2

Press the CLOCK button.

3

Within 5 seconds, press the MEMORY/SET button.

4

Press the TUNING/TIME ( or ) button to select the time

display mode.

AM 12:00AM 0:000:00

“0:00” → The 24-hour display will appear.

(0:00 - 23:59)

“AM 12:00” →The 12-hour display will appear.

(AM or PM 12:00 - 11:59)

“AM 0:00” → The 12-hour display will appear.

(AM or PM 0:00 - 11:59)

Note that this can only be set when the unit is first installed

or it has been reset.

5

Press the MEMORY/SET button.

6

Press the TUNING/TIME ( or ) button to adjust the hour.

(Main unit operation)

TUNING/

TIME

( )

MEMORY/

SET

CLOCK

ON/

STAND-BY

7

Press the MEMORY/SET button.

8

Press the TUNING/TIME ( or ) button to adjust the mi-

nutes.

Press the TUNING/TIME ( or ) button once to advance

the time by 1 minute. Hold it down to change the time in 5

minute intervals.

The hour setting will not advance even if minutes advance

from “59” to “00”.

9

Press the MEMORY/SET button.

The clock starts operating from “0” seconds.

(Seconds are not displayed.)

And then the clock display will disappear after a few seconds.

To see the time display:

Press the CLOCK button.

The time display will appear for about 5 seconds.

Note:

The clock display will flash on and off at the push of the

CLOCK button when the AC power supply is restored after

a power failure occurs or after the AC power lead is discon-

nected.

If this happens, follow the procedure below to change the

clock time.

To change the clock time:

Press the CLOCK button.

Within 5 seconds, press the MEMORY/SET button.

Perform steps 6 - 9 above.

To change the time display mode:

Perform steps 1 - 2 in the section “RESETTING THE MI-

CROCOMPUTER”.

Perform steps 1 - 9 above.

Press the TUNING/TIME ( or ) button once to advance

the time by 1 hour. Hold it down to advance continuously.

When the 12-hour display is selected, “AM” will change au-

tomatically to “PM”.

1

123

2

PREPARATION FOR USE

Notes concerning use:

Replace the batteries if the operating distance is reduced or

if the operation becomes erratic.

Periodically clean the transmitter LED on the remote con-

trol 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.

Remote control

15

0.2 m - 6 m

(8" - 20')

Reset the microcomputer under the following conditions:

T o erase all of the stored memory contents (clock and timer

settings, and tuner, video CD and CD presets).

If the display is not correct.

If the operation is not correct.

1

Press the ON/STAND-BY button to enter the stand-by mode.

2

Whilst pressing down the button and the button,

hold down the ON/STAND-BY button for at least 1 second.

Caution:

The operation explained above will erase all data stored in

memory including clock and timer settings, and tuner, video

CD and CD presets.

ON/

STAND-BY

RESETTING THE MICROCOMPUTER

OPERATION MANUAL

– 6 –

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.

CD-C1831V

STEP REMOVAL

1 Top Cabinet 1. Screw ..................... (A1) x4 7-1

2 Side Panel 1. Screw ..................... (B1) x6 7-1

(Left/right) 2. Hook....................... (B2) x2

3 CD Player Unit/ 1. Turn on the power supply, 7-2

CD Tray Cover open the disc tray, take out

4 Back Board 1. Screw ..................... (D1) x6 7-2

(with Jack PWB)

5 Tuner PWB 1. Screw ..................... (E1) x3 8-1

6 Main PWB 1. Screw ..................... (F1) x4 8-1

7 Front Panel 1. Screw ..................... (G1) x1 8-1

8

Headphones PWB

9 Display PWB/ 1. Screw .....................

Switch PWB 2. Hook ....................... (J2) x2

10 Tape Mechanism 1. Open the cassette holder. 8-2

11 Turntable 1. Screw..................... (L1) x1 8-3

12 Disc Tray 1. Screw..................... (M1) x2 8-3

13 CD Video PWB 1. Screw ..................... (N1) x2 8-4

(Note 2) 2. Socket .................... (N2) x4

14 CD Changer 1. Screw ..................... (P1) x4 8-5

Mechanism

15 CD Mechanism 1. Screw ..................... (Q1) x1 8-5

the CD cover, and close. (Note 1)

2. Hook....................... (C1) x3

3. Hook....................... (C2) x2

4. Socket .................... (C3) x4

2. Socket .................... (E2) x1

2. Socket .................... (F2) x4

3. Flat Wire................. (F3) x1

4. Tip Wire.................. (F4) x1

5. Flat Cable .............. (F5) x1

2. Socket .................... (G2) x1

3. Hook....................... (G3) x2

1. Screw ..................... (H1) x1 8-2

2. Support Bracket ..... (H2) x1

3.Socket ..................... (J3) x1

2. Screw...................... (K1) x5

2. Cover ..................... (L2) x1

2. Guide ..................... (M2) x2

Note 1:

How to open the changer manually. (Fig. 7-3)

1. Turn fully the lock lever in the arrow direction through the hole on the loading chassis bottom in this state. After that, push forward the CD player base.

Note 2:

1. 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.

PROCEDURE

(J1) x12

FIGURE

8-2

(B2) x1

(B1) x1 ø3x10mm

Side Panel (Right)

CD Video PWB

CD Player Unit

Back Board

CD-C1831V

(A1) x2 ø3x12mm

Back Board

(C3) x4

LOCK LEVER

Top Cabinet

(B1) x4 ø3x12mm

(C2) x1

Pull

Figure 7-1

(D1) x6 ø3x10mm

Figure 7-2

Figure 7-3

(B2) x1

CD Tray Cover

1

CD-C1831V

Front Panel

Side Panel (Left)

(B1) x1 ø3x10mm

Main PWB

(A1) x2 ø3x12mm

(C1) x3

(C2) x1

Front Panel

1

2

– 7 –

CD-C1831V

(P1) x4

ø3 x12mm (Q1) x1 ø2.6 x10mm

CD Changer Mechanism

CD Mechanism

Shift Lever

CD Player Base

(F2) x2

(F5) x1

(F2) x2

(G2) x1

(E1) x2 ø3x10mm

(F4) x1

(F3)x1

(G3) x1

Tuner PWB

Switch PWB

Main PWB

Figure 8-1

(J2)x2

(F1) x1 ø3x10mm

Front Panel

(G1) x1 ø3x10mm

(J3)x1

(G3) x1

(F1) x3 ø3x10mm

Front Panel

(E2) x1

Tuner PWB

(E1) x1 ø3x10mm

Main PWB

(N2) x2

CD Video PWB

CD Player Unit

Figure 8-4

(N1) x1 ø3 x10mm

Washer

(J1)x2 ø3x10mm

(J1)x7 ø3x10mm

(J1)x3 ø3x10mm

(H2)x1

(H1)x1 ø3x10mm

(L2) x1

(M1) x1 ø3 x10mm

(K1)x5 ø3x10mm

Figure 8-2

(L1) x1 ø3 x10mm

Washer

Display PWB

Headphones PWB

Open

Cassette Holder

Tape Mechanism

Turntable

Disc Tray

Be careful when installing the CD changer mechanism. Install the CD changer mechanism on the CD player base after the shift lever has been set in the highest position.

Figure 8-5

(M2) x1

CD Player Unit

(M2) x1

Figure 8-3

(M1) x1 ø3 x10mm

– 8 –

CD-C1831V

(A1) x2 ø2.6 x5mm

Loading Motor

Motor PWB

CP-C1831

STEP REMOVAL

1 Front Speaker 1. Front Panel ............ (A1) x1 9-1

2. Tip .......................... (A2) x2

3. Screw ..................... (A3) x6

Note:

The Surround speakers can be easily disassembled. Therefore the disassembling method is not described. For details refer to the disassembling drawing in the Parts Guide.

PROCEDURE

FIGURE

REMOVING AND REINSTALLING THE MAIN PARTS

CP-C1831

Tweeter

Front Panel

(A1)x1

(A3)x2 ø3x10mm

(A3)x4 ø4x12mm

Woofer

Figure 9-1

(A2)x2

Screw Driver

CD MECHANISM SECTION

Perform steps 1, 2, 3, 11, 12, 13, 14 and 15 of the disassembly method to remove the CD mechanism.

How to remove the loading motor (See Fig. 9-2)

1. Remove the screws (A1) x 2 pcs., to remove the loading motor.

How to remove the pickup (See Fig. 9-3)

1. Remove the screws (B1) x 2 pcs., to remove the shaft (B2).

2. Remove the stop washer (B3) x 1 pc., to remove the gear (B4).

3. Remove the pickup.

Note

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.

(B1) x2 ø2.6x6mm

Figure 9-2

Stop Washer (B3)x1

Pickup

– 9 –

Shaft (B2) x1

CD Mechanism Gear (B4) x1

Figure 9-3

CD-C1831V

ADJUSTMENT

MECHANISM SECTION

• Driving Force Check

Torque Meter Specified Value

Play: TW-2412 Tape 1: Over 80 g

• Torque Check

Torque Meter

Play: TW-2111 30 to 60 g. cm 30 to 100 g.cm Fast forward: TW-2231 — 50 to 100 g.cm Rewind: TW-2231 — 50 to 100 g.cm

• Tape Speed

Test Tape Adjusting

Normal MTT-111 Variable 3,000 ± Speaker speed resistor in 30 Hz terminal

TUNER SECTION

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

• AM IF/RF

Signal generator: 400 Hz, 30%, AM modulated

Test Stage

AM IF 450 kHz 1,602 kHz T351 *1 AM Band — 531 kHz (fL): T306 *2

Coverage 1.1 ± 0.1 V AM 990 kHz 990 kHz (fH): T302 *1

Tracking

*1. Input: Antenna, Output: TP302 *2. Input: Antenna, Output: TP301

Frequency

Tape 2: Over 80 g

Specified Value

Tape 1 Tape 2

Specified

Point

motor. (MM1)

Frequency

Display

Value

Setting/

Adjusting

Parts

Instrument

Connection

Instrument

Connection

• FM Notes:

1: Description of the "FM IF Adjustment" is not carried on this

Manual. It is because the IF coil in the FM front end section has been best adjusted in the factory so that its further adjustment is not needed at the field. When replacing the FM front end assembly, no adjustment is needed either.

2: The parts in the FM front end section are prepared in a

complete unit, so you can't obtain each part individually

• FM Mute Level

Signal generator: 1 kHz, 40 kHz dev., FM modulated

Frequency

98.00 MHz 98.00 MHz VR351 Input: Antenna (25 dBµV) Output: Speaker

Frequency

Display

Adjusting

Parts

Instrument

Connection

Terminal

CD ERROR CODE DESCRIPTION

When a malfunction occurs during CD operation, an error code will be displayed to identify the function in CD operation which failed.

Error State Code 0001 Cannot detect pickup-in SW 0101 Tray close operation error 0105 Tray close operation error 0201 Tray open operation error 0203 Tray open operation error 0304 Disc skip operation error 0305 Disc skip operation error

0307 Disc skip operation error

TP302

R357

IC303

T351

VR351

AM IF

FM MUTE LEVEL

T306

AM BAND COVERAGE

Figure 10 ADJUSTMENT POINTS

– 10 –

TUNER PWB

TP301

R336

FE301

T302

AM TRACKING

SO301 ANTENNA TERMINAL

TEST MODE

1 2 3

2

1

10ms

0.50 V IC1 20 FE

10ms

0.50 V IC1 7 TE

Enlarged View

TRACKING OFF-SET ADJUST

• Setting the test mode Any one of test mode can be set by pressing several keys as follows. <REC. PAUSE> + <DISC. SKIP> + <POWER> TEST: CD operation test

• TEST mode

Function — CD test mode

Setting of TEST mode Indication of CD TST mode (Fig. 11-1) OPEN/CLOSE operation is manual operation. The pickup can be moved by using the (

<MEMORY> LASER ON

<MEMORY> Tracking on the spot. SERVO OFF PLAY

) or ( ) key.

<MEMORY> Tracking on the spot. SERVO ON PLAY

IL is not performed.

CD-C1831V

<STOP>

STOP

<PLAY> key input

TOC. IL is performed, and the ordinary PLAY is performed. If the following key is pressed during PLAY, it is possible to specify directly any Track No. <Disc Number 1> key: Track 4 <Disc Number 2> key: Track 9

Press <STOP> key.

Stop

<Disc Number 3> key: Track 15

Note:

Only in STOP state it is possible to slide the pickup with the ( ) or ( ) key. VOL. --- Last memory

BAL. --- CENTER R.GEQ. --- FLAT X-BAS --- OFF

Canceling method - POWER OFF

Figure 11-1

CD SECTION

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

• Automatic adjustment item

1. Focus offset (Fig. 11-2)

2. Tracking offset (Fig. 11-3)

3. E/F balance (tracking error balance) (Fig. 11-4)

4. RF level AGC function (HF level: constant)

5. RF level automatic follow-up of the tracking gain This automatic adjustment is performed each time a disc is changed. Therefore,

each disc is played back using the optimal settings.

0.1s

0.50 V IC1 20 FE

FOCUS OFF-SET ADJUST

0.1s

0.50 V IC1 7 TE

TRACKING OFF-SET ADJUST

1 2

Figure 11-2

200 ms 1V/diV IC 1 15

200 ms 1V/diV IC 1 7

TO

TE

TRACKING/ ERROR BARANCE

1

ADJUST

2

Figure 11-4

– 11 –

Figure 11-3

CD-C1831V

NOTES ON SCHEMATIC DIAGRAM

• Resistor: To differentiate the units of resistors, such 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 ohm-type resistor. Besides, the one with “Fusible” is a fuse type.

• 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

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

REF. NO DESCRIPTION POSITION POSITIONREF. NO DESCRIPTION

SW1 OPEN/CLOSE ON—OFF SW2 MECHA UP ON—OFF SW3 DISC NUMBER ON—OFF SW4 PICKUP IN ON—OFF SW701 ON/STAND-BY ON—OFF SW702 BOOK MARK ON—OFF SW703 CLOCK ON—OFF SW704 TIMER/SLEEP ON—OFF SW705 DISC 1 ON— OFF SW706 DISC 2 ON— OFF SW707 DISC 3 ON— OFF SW708 DISC SKIP ON—OFF SW709 OPEN/CLOSE ON—OFF SW710 REV ON—OFF SW711 REC PAUSE ON—OFF SW712 MEMORY/SET ON—OFF SW713 STOP ON—OFF SW714 TUNER/BAND ON—OFF SW715 VIDEO/AUX ON—OFF SW716 TAPE ON—OFF

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

1. In the tuner section,

( ) indicates AM < > indicates FM stereo

2. In the main section, a tape is being played back.

3. In the deck section, a tape is being played back.

( ) indicates the record state.

4. In the power section, a tape is being played back.

5. In the CD section, the CD is stopped.

• 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.

SW717 CD ON—OFF SW718 AUDIO MODE ON—OFF SW719 P.B.C ON—OFF SW720 OSD ON—OFF SW721 DIGEST ON—OFF SW722 FF ON—OFF SW723 TUNING UP ON—OFF SW724 TUNING DOWN ON—OFF SW725 PLAY ON—OFF SW726 VOLUME DOWN ON—OFF SW727 VOLUME UP ON—OFF SW728 X-BASS/DEMO ON—OFF SW729 EQUALIZER ON—OFF SW730 DIMMER ON—OFF SW801 VOLTAGE SELECTOR 110/127/220/

SWM 3 FOOL PROOF ON—OFF SWM 4 F.A.S. ON—OFF SWM 5 CAM ON—OFF

FRONT VIEW

230–240V

3

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

2SA1015 GR 2SA1318 2SC2389 SE 2SC3331 KRC102 M KRC102 S KRC104 M KRC104 S

FRONT

VIEW

KRC107 M KTA1266 GR KTA1271 Y KTA1273 Y KTA1274 Y KTD2058 Y KTC3199 GR KTC3203 Y

1 2 3

SVC348S KTA1298

L1154GT4 SLI342DCB SLI342UCB SLI342UCJ SLI342YCB SLI342YCJ

Figure 12 TYPES OF TRANSISTOR AND LED

– 12 –

21

KTA1504 KTC3265 KTC3876

+5V

X1

16.93MHz

TO MAIN SECTION

17 26 50 51

54

XVDD

47

LVDD

27

VDD AVDD

6

52

XOUT

53

XIN

10 12

16

4

(TO IC601)

5

2

4

6

3

7 1

IC4

543

56 49

LR

RVSS

LCHN

+B1

CNP11

+B5

1

BA4558F

OPE AMP.

IC2

LC78631E

SERVO DSP

HFL20TES23TOFF24TGL28JP+29JP–

EFMO

EFMI

CLV+

V/P

~

11 13

19

15

9

Q51

39 38

45

~

41

72

~

67 80

78

RES. CQCK. COIN

SQOUT. RWC. WRQ

77 64

SW2

MECHA UP

10

9

GND (D)

10

9

SW3

DISC No.

7

8

6

MECHA UP

GND (D)

DISK NO.

7

8

6

M3

LOADING

SW1

OPEN/CLOSE

M

5

2

3

4

OPEN/CLOSE

GND (D)M–M+

2

5

3

4

SOLM1

1

GND (M)

1

TO MAIN SECTION

CNS10

CNP10

JKV1

VIDEO OUT

6

ICV4

VIDEO

OPERATION

AMP.

NJM2267M

1

XV2

27MHz

+B1

QV4

206

1

VDD

36

~

39

86 68

~

65 14

13 35 32

33 95 97

~

99

DQ12 DQ15

DQ0

~

2

~

38

MA8

VOUT1 MD12

MD15 X2

X1 AUDO AUBCK

AULRCK CDC2PO CDLRCK

CDI

1

ICV3

DRAM

SDM4260C

DQ3

DQ4

DQ7

WE

~

7

5

10 13 14

~

45

42

48 49 52

MA4

MA3

MA0

MRAS

MPEG DECOEDER

D61012GC

VDD,CKSEL,HSELX, HSELAAVDD,

~

25

15

17 23 36

CD-C1831V

21 27 35 40

DQ8

~

22

26

~

58

62

MD5

MD4

MD0

63 75 83 84 92

DQ11

~

31

34

~

70

73

6

MD8

11

MD11

12 18 26 30 37 43 50

HD7

2

HD4

5

HD3

7

HD0

10

RASA0A3A4A8

~

16

19

~

54

56

MWE

MCAS

ICV2

44 51

57 64 69 74 76 94 96 100

~

+5V

LASER

DRIVER

+B1

Q52

Q1

PICKUP UNIT

64

VCC1

62

LD0

~

32 40 43 44

22

JP–

CV+

IC1

LA9241M

SERVO AMP.

FIN2

FIN1EF

2

3

1

FOCUS COIL

SL1

SLC

4

TRACKING COIL

DAT

DRF

SL+

SL–

SLD

SPO

QV1

25 20

7 2 1

23

M1

SPINDLE

MOTOR

+B1

+B5

18244020

IC3

M63001FP

FOCUS/ TRACKING/ SPIN/SLED

DRIVER

15

7

45

6

3839284142 37 36

16 26

53

CE

CL

SP

FD TO

CL, DAT, SELIAL CONTROL/CE

52 51

54

SL+. SL–. DRF

31 30

29 23 27 16 15

PU-IN SW

35 29

22 21 14

~~

8

27

+B1

CNPV2

QV2

QV3

XV1

4.19MHz

2

4

1

3

1213 11

CD-LD M–

CD-LD M+

MO SPEED

15

PWR_MPEG

40

X2

MPEG CONTROLLER

X1

41

18 19 20 22

MDI MDO MCK MBUSY

CD SOL

6 7 9

IX0313AW

~

14 16 17 33

ICV1

25

~

64

HD7

~

45

39 42~50

57

HD0

M

TO MAIN SECTION

M2

SLED

MOTOR

(TO IC701)

M

PICKUP IN

SW4

Figure 13 BLOCK DIAGRAM (1/3)

– 13 –

CD-C1831V

A I

S

FM 75 ohms

GND

AM

SO301

ANTENNA

TERMINAL

FE301

FM FRONT END

2867 3 4

F OUT

AM RF

AM ANT

T302

OSC

T306

VT

AM OSC

+B4

FM +B

FM IF CF302

FM MUTE LEVEL

FMOSC

+B4

Q360

FM

VOLTAGE REGULATOR

VR351

AM IF

FM IF IN

7

T351

12 3 4589

REG INOUT VCC

FM/AM IF MPX.

AM OSC

23

22

24

IN

AFC

OUT

X352

4.5MHz

2220

15

1

OSC

IC302

LC72131

PLL (TUNER)

CF352

IC303

LA1832

21

STEREO

AM RF IN

INAM

FM IN

1116

3 6

CE

1

5

GND

13

MONO/ST

FM MONO/ST

10

4

5

DI

CL

Q371

DO

FM DET

67

SD

+B4

CF351

17 19

IF

OUT

10

PHASE

VOLTAGE REGURATER

+B4

IF IN

1213

21

X351

Q361 MPX

17

456kHz

11

+5V

20

12

18 16

FM/AM

OUT

MPX VCO CUT

MPX

IN

14

15

RL

MUTING

TUNER MUTE

Q353 Q354

3 5

3

IC563

KIA4558P

OPE AMP.

IC562

KIA4558P

OPE AMP.

8

SWM3

FOOL PROOF

SWM4 F.A.S

SOLM1

SOLENOID

SWM5

CAM

–B1+B5

8

4

1

6 7

1

4

–B1+B5

+B7

FM/ SW

KIA70

RE

FROM CD VIDEO SECTION CNPV2

FROM CD SECTION CNP11

TAPE 1

PB HEAD

TAPE 2

REC PB HEAD

L-CH

R-CH

L-CH R-CH

ERASE HEAD

REC

P.B

AC BIAS

CNSV2

1 2 3 4

CNS11

1 2 3

SWITCHING

Q103~Q106

PLAYBACK AND RECORD

POP REDUCE

L REC R REC

AN7345K

/PLAYBACK AMP.

L(T1)

1

24

R(T1) L(T2)

2

23

R(T2)

L NF

3 4

R NF

T1/T2

6

REC

9

16 14

REF

11

NOR/

12

HIGH

15 19

SWITCHING SWITCHING

Q107 Q108

Q109

SWITCHING

BIAS OCS

Q128 L104

IC101

Q111

P.B.

H/N

T1/T2

13

4

21

5

20

7

18

8

17 10

Q110

L R

L R REC

L NF R NF

ALC

+B4

PB

JK601

VIDEO/AUX

L

R

Q113 Q114

SWITCHING

Q124 L103

AUX TAPE TUNER

CD

M62439SP

1

20

10

IC601

9

11

5

L

16

R

4

L

17

R

3

L R

18

AUDIO PROCESSO

L

2

R

19

BAIS

Q126

Q121 Q122

MUTING

Figure 14 BLOCK DIAGRAM (2/3)

– 14 –

SWM3

FOOL PROOF

SWM4

F.A.S

SOLM1

SOLENOID

SWM5

CAM

FM/AM SWITCHING

+B7

KIA7042AP

RESET

10

601

439SP

ROCESSOR

9

Q121 Q122

MUTING

1

IC704

13

8

CD-C1831V

FL701

DISPLAY

Q702

M

Q703

MM1

TAPE MOTOR

50 49 48 47

+B7

46 45 44 43 42 41 40 39

+B7

3

Q603 Q604

+B1

+B4

+B5

+B2

38 37 36 35 34 33 32 31

+7.3V

+12V(ANALOG)

+12V(MOTOR)

+5.6V

3

2

1

RX701

2

KEY

ZD801

SW701~SW730

Q601 Q602

+B4

R

L

REC

T1/T2

1 2 3

VDD

AVDD

4

535251

282930

+B5

PHM1

–B1

Q821

~~~

15 2516

MICROCOMPUTER

–15V

VOLTAGE

REGULATOR

Q822

Q824

Q823

28

26

IC701

IX0314AW

SYSTEM CONTROL

VDD

+B7

IC901

R

14

STK047-040B

10

L

POWER AMP.

–B

2

1

VOLTAGE

REGULATOR

VOLTAGE

REGULATOR

VOLTAGE

REGULATOR

Q801

29

+B

3

~

36

D701 ~D704

XL701

4.19MHz

15

D803~D806

ZD802

37 3839

7170696867666564636261 80797877

737260595857565554

101112131415161718192021222324252627

8

9

RESET

Q704

6 7

D801

D807 ~D809

6

7

FRONT

L-OUT

R-OUT

T4A L 250V

767574

Q908

4 3 2 1

5

+B5

F802

F803

F805

T2A L 250V

+B2,+B6

Q705 Q706 Q707

81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99

100

VDD

TO CD SECTION

Q960

T801

POWER

TRANSFORMER

RL901

T.F

MEMORY BACK UP

+B5

JK970 HEADPHONES

230-240V

220V

127V

110V

UNSWITCH +B7

M901

M

FAN MOTOR

SO901 SPEAKER TERMINAL

SURROUND SPEAKER

FRONT SPEAKER

SW801 VOLTAGE SELECTOR

RL801

AC POWER SUPPLY CORD

BAIS

+5V

+B6

Q802

UNSWITCH

+B7

Q803

Figure 15 BLOCK DIAGRAM (3/3)

– 15 –

D810~D813

T802

POWER

TRANSFORMER

AC 110/127/220/230-240V 50/60Hz

CD-C1831V

10P

C129 470P

C131

C130

C132

2

M

A

B

C

D

E

F

ERASE HEAD

G

CNS11

R-CH

1

A_GND

2

L-CH

3

CD_GND

4

CNP11

TAPE1

TAPE2

RECORD/

+7V

5

+12V

6

P23 12 - C

TO CD VIDEO PWB

PLAYBACK HEAD R-CH

L-CH

PLAYBACK HEAD

R-CH

L-CH

P18 1 - E

TO POWER SECTION

CNS101

TAPE1_R

1

A_GND

2 3

TAPE1_L

CNS102

M_GND

1

ERASE

2

TAPE2_R2

3

A_GND

4

TAPE2_R1

5

TAPE2_L1

6

TAPE2_L2

7

BI601

1 2 3 4 5 6

12

13

1 2

3

10

2

14

1 2 3

CNP102 CNP101

1

2 3 4

5 6

7

+B

CD_+B

CD_GND

L A_GND R

A_12V

A_GND M_GND

+B

FM SIGNAL

R635

330

R636 330

+B

PLAYBACK SIGNAL

R621 10K

Q603 2SC3331

R615

3.9K

C625

0.001

R645

R619

2.2K R620

2.2K

C626

0.001

Q604

R616

3.9K

2SC3331

R622 10K

C627 22/25

Q109 ~ Q111: SWITCHING

C102

0.001 C101

0.001

C106 180P

C105 180P

C109

0.047 R113

10K

9.3V Q109

2SA1318

9.3V

0V

0.7V

Q104

0V

2SC2389 SE

0V

0.7V

Q106

2SC2389 SE

Q105

2SC2389 SE

0V

Q103

0V

2SC2389 SE

Q103 ~ Q108: SWITCHING

C635

0.0047

Q601 2SC3331

100K

2SC3331

C634

R646 100K

0.0047

R625 22K

R104

2.2K R106

3.3K

0.7V

R105

3.3K R103

2.2K

Q602

R114 10K

R115

4.7K

8.6V

0.7V

C623

0.001

C624

0.001

C629 22/25

R109

R107

R617

2.2K

R108

R110

4.7K

0V

47K

R613 10K

4.7K

0.1/50

R618

2.2K

Q110

KRC104 M

0V

2

1

0V

2

R112 10K

R102 1K

R101 1K

47K

0V

Q107

2SC3331

R611 330

C621

R614 10K

R628

22K

3.4V 3

1

0V

3 Q111

KRC104 M

C108 0.001

Q108

2SC3331

C107

0.001

C603

4.7/50

0.1/50

3.4V

C601

4.7/50

C605

4.7/50

C622

R111 10K

RECORD SIGNAL

R639 47K

R607 1.5K R605 1.5K R603 1.5K R601 1.5K C611 0.033

C615

C613

0.22

C617

2.2K

R609

10/50

C619

0.022

Q113

C112 330P

C111 330P

R169

680

R118

R117

+B

R173

5.6K

R171 220K

R120

56

C118

0.033 R122

100K C116 47/25

1K

C113

1K

330P

C115 47/25

R121

100K C117

0.033

R119

56

R155 150

C153 100/16

2SC3331

1 2 3 4 5 6

IC601

7 8 9

10 11

R623

10K ZD601 MTZJ2.4B

R629 330(1/2W)

+B

Q114

2SC3331

R170

C155

3.3/50

680

C120 560P

R124

3.9K

C114 330P

222324

21

–

112K

+

Hich=T1

+

112K

–

4 3 2 1

R123

3.9K

C119 560P

R131 33K

20

R608 1.5K

19

R606 1.5K

18

R604 1.5K

17

R602 1.5K

16

C612 0.033

15

C614 0.22

14

M62439SP

13 12

AUDIO PROCESSOR

R610 10K

22K

R612

C616

R175 1K

R174

5.6K

R172 220K

C154

1920

C127

0.022

R134

6

R135

8.2K

R136

68K

8.2K

C128

R138

3.3/50

R137

47/16

6.8K

18

7

6.8K

R132

R126

5.6K

C122 1/50

C121 1/50

R125

5.6K

33K

5

C156

3.3/50

H

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

1

23456

Figure 16 SCHEMATIC DIAGRAM (1/11)

– 16 –

CD-C1831V

AUDIO

PROCESSOR

33K

C156

2

GNAL

20

R608 1.5K

19

R606 1.5K

18

R604 1.5K

17

R602 1.5K

16

C612 0.033

15

C614 0.22

14 13 12 11

R610 10K

175

K

174

.6K

172

20K

3.3/50

26

K

22

0

19

5

21

0

C127

0.022

5

K

R134

6

R135

8.2K

R612

R136

68K

C128

22K

8.2K

3.3/50

C154

47/16

R138

6.8K

18

R137

6.8K

C616

MUTING

7

CD SIGNAL

C602

4.7/50

C606

4.7/50

C604

4.7/50

10P

C618

C620

10/50

Q122

2SC3331

0V

0.7V

0V

R142

C130

470P

R140 560

C132

0.001

C134 22/25

17

– +

Hich=CHROME

+ –

8

C133 22/25

C131

0.001

R139 560

C129 470P

–B

(1/2W)

R630

330

0.022 ZD602

MTZJ2.4B

–B

R156 220K

R154 10K

R146

56

C140

0.0033

C136

0.068

C142

16

56K

9

R141

56

C135 0.068

C139 0.0033

R642 47K

R640 47K

R626 2.2K

C628

0.22

R624 330

REC_R

R153 10K

Q121 2SC3331

10K

1/50

C145

22/25

15 14 13

RIPPLE

Nor/CrO2

ALC

10 11 12

C141 1/50

R145 10K

+B

0.7V

MUTING

C146

220/10

Vcc

GND

R641 47K

R653

220K R638 220K

R655

5.6K

R637 220K

REC_L

0V

R157 220K

0V

R158

220

Q124

2SA1015 GR

SWITCHING

L103

IC101

AN7345K

100µH

PLAYBACK AND

R167 100K

RECORD/PLAYBACK AMP.

R166 47K

Q651 2SC3331

+B

11.7V

0V

R160 150

BIAS OSC

KTC3203 Y

C150

0.0039

C151

0.027 (ML)

R164

4.7K

R651 680

C651

3.3/50

R656

R162 47K

11.6V

Q128

330µH

C652 1/50

1K

+B

0V

1

2

Q126

KRC104 M

BIAS

0V

R168 12

L104

+B

R633

C631 390P

C632 390P

22K

R634 22K

D601

1SS133

D602

1SS133

D_GND

A_12V

A_GND

TUN_L

TUN_R

CLK

A_GND

VF1

-VP VF2

HI_CUT S_MUTE

SP_DET SP_RLY

T_T1 T2

T_BIAS

REC/PLAY

D_GND

M_12V

SPA_SIG

–15V

+5V

M_12V

–15V

VF1 –VF VF2

+5V SP_DET SP_RLY

C630

0.022

CLK

DO CE

DI

DO CE

DI

CNP701

R631 22K

R632

22K

R652

220K

R654

5.6K

Q650 2SC3331

R650

680

C650

3.3/50

–B

+B

3

0V

+B

C152 47/25

+B

–B

+B

–B

1 2 3 4 5 6 7 8 9

CNS303

1 2 3 4 5

6

7 8 9

10 11 12 13 14 15 16 17 18 19 20 21 22

7

6

17 15 16

8 4 5

L-CH

JK601

VIDEO/AUX

R-CH

CNP303

P26 6 - A

CNS701

P20 1 - D

P18 1 - E

TO POWER SECTION

TO TUNER PWB

TO DISPLAY PWB

MAIN PWB-A1(1/2)

7

8 9 10 11 12

Figure 17 SCHEMATIC DIAGRAM (2/11)

– 17 –

CD-C1831V

R

Q

A

R938

S

L U

A

B

C

D

E

TO MAIN SECTION

P16 2 - D, P17 12 - G

F

G

IC901

STK407-040B

POWER AMP.

–Vcc

C904

10/50

C821

0.047(ML)

10K

R837

+Vcc

C907

10/50

C909

2200/50

AN78L05

3

D820

C831

Q821

47/25

1234

C901

100K

R901

100K

R903

1/50

C903

1/50

+B

68K

R902

68K

R904

+B

L

1

A_GND

2

R

3

SP_DET

4

SP_RLY

5

–15V

6

M_12V

7

+5V

8

D_GND

9

A_12V

10

A_GND

11

CD_+B

12

CD_GND

13

M_GND

14

–VF

15

VF2

16

VF1

17

R905

1K

220P

C902

220P

C905

R907

1K

R830

820 (3W)

C830

47/25

+B

NC

–B

2

1SS133

(2Ch)

NC

5

R925

C910

2200/50

+B

1

D821

C824

1SS133

VOLTAGE

REGULATOR

C832

0.1(ML)

Ch1

Out

6

R912 100(1/4W)

Fusible

100 (1/4W)

0.1(1W)

C921

0.022 R931

10K

REGULATOR

KTD2058 Y

22K

R832

0.047(ML)

22K

R827

D832

1SS133

D833

1SS133

Ch2

Out

7

C912 100/50

R913

Fusible

1K

R929

Q905

2SC3331

R966

22K

VOLTAGE

Q823

33

R825

C825

22/25

REGULATOR

KIA7812P 3 1

C826

47/25

C828

Q822

KIA7806P

31

2

8

C911 100/50

0.1 (1W)

+B1

VOLTAGE

Q824

2

0.1

(ML)

C833

0.1

(ML)

Ch1

9

R926

C920

0.022

+

–

10

C915

47P

C916

15P

R917 56K

R916

1K

D903

1SS133

R928

1K 10K

R930

C829

3300/25

C827

0.1

(ML)

+B

FM SIGNAL

11

R918

820

C917 47/50

Q904

2SC3331

+

Ch2

–

12 13

R921

22K

820

R922

D906 1SS133

D904

1SS133

Q907

2SC3331

R923

C918

47/50

C923

47P

56K

+B2

+B

1K

R924

+B

1N4004S

R803

R801

12K

14

15

15P

C924

Q906

2SC3331

C938

47/50

D803

D804

1N4004S

47K

C802

100/35

P21 12 - E

56K

R939

R936

56K

T

D806 1N40

D805 1N40

C803

47/50

ZD801

R802

47

MTZJ6.2A

KT

VO

REG

1 2 3

CNS806

4

TO DISPLAY PWB

MAIN PWB-A1(2/2)

H

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

1

23456

Figure 18 SCHEMATIC DIAGRAM (3/11)

– 18 –

CD-C1831V

Q906

C924

C802

4

15P

2SC3331

C938

47/50

D803

4004S

D804

N4004S

100/35

01

K

15

56K

R939

R936

56K

TS6B04GM

D806 1N4004S

D805 1N4004S

C803

ZD801

R802

MTZJ6.2A

KTA1274 Y

VOLTAGE

REGULATOR

56K

R938

C936

0.1

(ML)

R934

4.7

D801

ZD802 MTZJ30B

47/50

47

Q801

C937

0.1

(ML)

R937

C804

47/50

R806

4.7

C805

C806

2.2K

+B

C807

C808

–B

0.22

D807

1N4004S

C812 220/50

C811 220/50

D809

1N4004S

Q908

KRC107 M

T4A L 250V

0.22

T4A L 250V

0.22

T2A L 250V

C813

220/50

D808

1N4004S

R946

330(1/2W)

RL901

2

F802

F803

F805

D907 1SS133

1

3

R941

4.7K

CNP802

4.7K

R942

R949

330(1/2W)

1 2 3 4

5

6

7 8

CNS802

1 2

3

4

5 6 7 8

R960

22

+B

D960

R967

1SS133

150

15K

+B

R961

C960

10/50

C951

0.001

C950

0.001

C953

0.001

+B

T.F

T801

POWER TRANSFORMER

C961 47/50

R963 R962

68K

C954

100/50

1K

WTM801

C956

C952

0.001

CNS804

CNP804

2

11

Q960

2SC3331

1 2 3

4

5

+

SURROUND SPEAKER L-CH SURROUND SPEAKER R-CH

+

SURROUND SPEAKER L-CH GND

–

SURROUND SPEAKER R-CH GND

–

FRONT SPEAKER L-CH

+

FRONT SPEAKER R-CH

+

FRONT SPEAKER L-CH GND

–

FRONT SPEAKER R-CH GND

–

TERMINAL

D961

1

2

3

4

5

CNS801

M

HEADPHONES PWB-A5

FW801

1

5

SO901

SPEAKER

TO TAPE MECHANISM CHASSIS

D962

1SS133

SW801

VOLTAGE SELCTOR

230-240V 220V

127V 110V

RL801

CNP801

D802

1SS133

M901 FAN MOTOR

JK970

HEADPHONES

0.1

C801

SO801

AC

INPUT

16 OHMS/CH

6 OHMS/CH

AC POWER SUPPLY CORD AC 110/127/220 230-240V 50/60Hz

1

AC _RLY_CON

2 3

CNS806

4

P21 12 - E

CNP806

TO DISPLAY PWB

7

+B

+5V

UN_SW_5V

D_GND

Q802

KRC107 M

2

1

3

D818

1SS133

D815

C815

1SS133

1000/6.3

C814

10/16

R808

220

AN78L05

3

Q803

1

2

D816

1SS133

D810

1SS133

D811

1SS133

C810

470/25

D813

1SS133

D812

1SS133

T802

C809

0.047(ML)

POWER TRANSFORMER

+B

POWER PWB-A2

8 9 10 11 12

Figure 19 SCHEMATIC DIAGRAM (4/11)

– 19 –

CD-C1831V

10K

L

D

A

B

C

D

E

F

G

TO MAIN PWB

M

MM1

TAPE MOTOR

SWM3

FOOPL PROOF

SWM4 F.A.S

SOLM1

SOLENOID

SWM5 CAM

P22 1 - E

CNPV2

TO CD VIDEO PWB

P17 12 - F

CNP701

TAPE MECHANISM PWB-F

FWM1

2+

–

2

13

CNPM2

FWM2

VLOAD (–VP)

PHM1

4

RUN PALS SENSOR

CLK

A_GND

TUN_SM

VF1

VF2

SPN_P

HI_CUT

S.MUTE

SP_DET

SP_RLY

T_T1 T2

T_BIAS

REC/PLAY

D_GND

12V M

SPA SIG

–15V

DISPLAY PWB-A3

CNSV2

MDI

1

MDO

2

MCK

3

MBUSY

4

R721 100K

Q705 2SC3331

1K

R706

CNS701

1

DO

2

CE

3 4

DI

5 6 7 8 9

10 11 12 13 14 15 16 17 18 19 20 21

5V

22

CNPM1

MOTOR

1

2

3

GND

4

+12V

5

T2 RUN

6

7

FPA

8

9

T1 RUN

10

SOLENOID

11

CAM SW

12

CNSM1

+B

–B

+B

–B

+B

R722 100K

Q706 2SC3331

1K

R707

R551

10K

R556

33K R558

R553

1SS133

R555 56K

R560 470K

68K

12K

D551

Q707 2SC3331

R708

R562 390K

C551 270P

C557 270P

C559

0.0027

C553

0.0027

C555

0.0068 C556

0.0068

R567 270K

R561 15K

R723 100K

1K

C561

0.022

C562

0.022 R573 560K

R568 220K

R570 220K

R564

R566

390K

2.2M

R572

2.2M

R716 33

R717

10K

2 3

5 6

IC563

OPE AMP.

KIA4558P

2 3

5

6

IC562

KIA4558P

OPE AMP.

C720 47/50

R719

R575

FL701

FL DISPLAY

F F F

P21

P22

1 2 3 4

C702 1/50

R724

SPEANA3

R578 100K

R579 100K

SPEANA1

0.022

SPEANA2

R580

100K

10K

+B

10K

R720

–B

R574

330

D554

4

1SS133

1

C566

2.2/50 D555

8

1SS133

7

C567

2.2/50

–B

D556

4

1SS133

1

C568

2.2/50

8 7

C563

0.022

C569

ZD551 MTZJ6.2C

R726

R758

1.2K

10K

R727

5

D702

D702~704: 1SS133

10K

R760

10K

12V

10K

R759

P19

P20

8

6

7

D703

D704

12V

+B

Q703

KTA1271 Y

12V

P16

P17

P18

10

9

Q702 KTA1273 Y

0V

D716 1SS133

P11

P12

P13

P14

P15

12 13 14

15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32

11

80 79 78 77 76 75 74 73 72 71 70 69 68 67 66

R701 1K

65

R702 1K

64

R703 1K

63 62

R705 1K

61 60

R709

59

1K

58 57 56 55

R712 1K

54

R713 1K

53

R714 1K

52

R715 1K

51

+B

C705 47/25

+B

GND

MOTOR

+12V

12

3

P08

P09

P10

P9 VLOAD P11 P12 P13 P14 P15 P16 P17 P18 P19/DIST1 P20/DIST2 P21/DIST3

P22/DIST4 NC DISTOUT SPN_P SP_DET SPRLY

HI-CUT

S MUTE

DIST0 T_T1T2 T-BIAS

FPA

R730 1K

R731 1K

T2 RUN

T1FAS

FPA

4

6 5

P05

P06

P07

TIFAS

P02

P03

P04

P2P3P4P5P6P7P8

80

P10

IX0314AW

SYSTEM CONTRO

MICROCOMPUTER

DIST0 L:DEMOSTART DIST0 H:ECOSTART

52

REC/PLAY

51

AC RLY-CON

TIMER LED

CAM SW

VDD

T_MOT

T_SOL

R734 2.2K

R733 2.2K

R736 1K

R735 1.8K

R732 1K

LED722

SLI342UCJ

10K

R747

+B

R752

10K

R754 10K

+B

SOLENOID

CAM SW

BI701

8

7

G11

P01

P1

P11

IC701

U/D SW

DNO SW

R737 1K

R753 10K

R748

G10

P10

VSS

10K

G08

G09

9493929190898887868584838281

VDD

1

30

T2 RUN

REMOCON

SYS STOP

3738394041424344454647484950

R738 1K

R739 10K

R740 1K

R749

10K

+B

G06

G07

CD

O/C SW

PUIN SW

R741 1K

R755

10K R756 10K

R757

10K

LE

G05

9695

G5G6G7G8G9

C

3536

R750

LE

H

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

1

23456

Figure 20 SCHEMATIC DIAGRAM (5/11)

– 20 –

CD-C1831V

R736

1K

-

G11

G10

P01

25 26 27 28 29 30 31 32 33 34 35 36 37 38 39

P1

P10

P11

IC701 X0314AW EM CONTROL

OCOMPUTER

L:DEMOSTART H:ECOSTART

G09

1

G08

949392919089

VDD

G05

G06

G07

CD DSP RWC

CD DSP WRQ

CD DSP COIN

CD DSP CQCK

CD DSP RES

30

AY

T2 RUN

CON

DNO SW

U/D SW

VSS

REMOCON

SYS STOP

O/C SW

PUIN SW

373839404142

R753 10K

754

0K

R737 1K

R738 1K

10K

R748

R741 1K

R739 10K

R740 1K

R749

10K

R755

10K R756 10K R757 10K

R750

10K

+B

G03

G04

99

98979695

LCK1

RESET

VDD

PCCL

SQOUT

FRF(DRF)

SLD+ SLD–

AVSS SPEANA3 SPEANA2 SPEANA1

KEYIN1

AVDD

33343536

R742 1K

R743 1K

G01

G02

100

G1G2G3G4G5G6G7G8G9

DO

DI

CE

CLK

X2 X1

VPP

KEYIN2

KEYIN3

3132

R751

1 2 3 4 5 6 7 8 9

10

11

XL701

12

4.19 MHz

13 14 15 16

17 18 19 20 21 22 23 24 25 26 27 28 29

R761 1K

30

1K

R744

3.3K

F F F

R778 1K R777 1K R776 1K R775 1K R774 1K

R771 1K

R769 1K

R768 1K

R767 1K R766 1K R765 1K R764 1K R763 1K R762 1K

R745

1K

+B

RD01 820

SW701

ON/STAND BY

LED716 SLI342YCJ LED717 SLI342YCJ

+B

C706 1/50

R772 1K

C708

18P

R770 1K

SW710

SW702

BOOK MARK

STOP PLAY

RD10 820

REV

C707

15P

RD02

1.2K

RD21 820

SW722

FF

RD11

1.2K

SW711

REC

PAUSE

SW703

CLOCK

C709

0.022

+B

C710 220/10

+B

100µH

C723

0.1/50

RD22

1.2K SW724

SW723

TUNINGUPTUNING

DOWN

RD12

1.5K SW713

SW712

STOP

MEMORY/

SET

RD03

SW704

1.5K TIMER/

SLEEP

R787 1K R786 1K

L702

RD23

1.5K

RD13

1.8K

D717

RD04 12K

1SS133

C711

0.01

RD24

1.8K

PLAY

RD14

2.2K

SW714

TUNER/

BAND

5V BACK UP D723

1SS133 KRC102 M

R795

47K

RESET

VIDEO/ AUX

Q704

2

1

D718

RD25

2.2K SW726 SW725

VOLUME DOWN

RD15

3.3K

SW715

11

3

1SS133

VOLUME UP

SW716

TAPE

FW702

C712

3.3/50

RD26

3.3K

SW727

RD16

3.9K

8 8

+B

R797

100K

+B

R711

4.7K

IC704

KIA7042AP

RESET

2

C713

0.022

RD28

RD27

6.8K

3.9K

SW728

SW729

X-BASS/

EQUAL

DEMO

IZER

RD17

6.8K

SW717 SW718

AUDIO

CD

MODE

RD05

6.8K

DISC1

3 1

RD18 12K

C722

10/50

SW730

DIMMER

SW706 SW705

RX701

RD19 22K

SW719 P.B.C

RD06 12K

1SS133

D720 1SS133

2 3 1

R780 10K

D721

REMOTE SENSOR

SW720

RD07 22K

SW707

DISC3 DISC2

D719

1SS133

R798

100

C714

0.022

RD20 68K

OSD

+B

D722

1SS133

DIGEST

RD09 68K

SW708 DISC

SKIP

+B

C715

+B

SW721

+B

SWITCH PWB-A4

+B

RS711

1.5K

47/25

C719

0.022

RS712 1.2K

1 2 3 4

C718 47/25

SW709

OPEN /CLOSE

VDD

VSS

OE

DATA

+B

Q11

CLOCK

+B

NIGHT

RIDER 9

NIGHT

RIDER 10

LED709

LED708

LED710

L1154GT4

RS710 1K

RS709 1K

Q9Q7Q8

Q10

LCK

6

5

RS702 470

RS701 470

LED701

L1154GT4

LED702

SLI342YCB

LED703

NIGHT RIDER 1

NIGHT RIDER 2

+B

RIDER 8

NIGHT

RIDER 7

NIGHT

RIDER 6

LED707

LED706

L1154GT4

SLI342YCB

RS706 470

RS708 1K

RS707 470

101112131415161718

Q6

Q5

Q4

Q3

Q2Q1Q0

8

9

7

RS703 470

RS704 470

RS705 470

LED705

SLI342DCB

LED704

SLI342UCB

NIGHT RIDER 4

NIGHT RIDER 5

NIGHT RIDER 3

RWC(DSP)

1

WRQ(DSP)

2

CO IN(DSP)

3

SQ OUT(DSP)

4

CQ CK(DSP)

5

RES(DSP)

6

DRF(ASP)

7

D_GND

8

SLD+

9

SLD–

10

PUIN SW

11

OPEN/CLOSE

12

DISC NO

13

UP/DOWN

14

PCCL

15

BI702

CNS12

+5V

1

AC_RLY CON

2

UN_SW 5V

3

D_GND

4

BI703

CNS806

+B

IC703

BU2092F

INPUT/OUTPUT EXPANDER

SLI342DCB

+B

CNP12

P22 6 - H

TO CD VIDEO PWB

CNP806

P19 7 - G

TO POWER PWB

7

8 9 10 11 12

Figure 21 SCHEMATIC DIAGRAM (6/11)

– 21 –

CD-C1831V

OP/CLOS

A

B

C

D

E

F

G

H

K E A B F

CNS1ACNS1B 5 4 3 2 1

PICKUP UNIT

K

5 4

E A

3 2

B

1

F

SW4 PICKUP IN

1M

1 2 3 4 5 6 7 8

TR-

1

TR+

2

FO+

3

FO-

4

GND

5

PD

6

VR

7

LD

8

CD MOTOR PWB-D

M1 SPINDLE MOTOR

+

SPIN

M

-

M2

+

SLED MOTOR

SLIDE

M

PU-IN

1 2 3 4 5

2200P

1/16

1M

2200P

ACTUATOR

CNS2ACNS2B

1

2 3 4

5 6

7

8

CNP3A

CNP1

TR+ FO+

FOTR-

6 5 4 3 2 1

R2 1K

CNP3

C2

0.01

C54

0.001

R13 1K

R14 27K

8

R20 1K

R22 820

C12

0.1

TRTR+ FO+ FO-

C36

100/10

C55

100/10

SP+ SPSL_+ SL_-

CD_PUIN

C1 47/10 Q1 KTA1504GR

9

C4

0.1

R9 100K

R10

2.2K R11

6.8K

R12 100

C9

0.047

R16

3.3K Q56

KTC3876Y

R21

1.5K

+B

R15 12K

C5

0.033

C76

0.022

C15

0.01

K

1

A

2

B

3

E

4

F

5

!

PD

TR-

1

TR+

2

FO+

3

FO-

4

GND

5

PD

6

VR

7

LD

8

LD

CNP2

6

5

4

3

2

1

+B +B

LASER DRIVER

R1

R8 15K

C6

0.033

C8

0.068

R17 33K

R18 15K

R19 1K

12

C3 1/50

R46 560

4

6 3 6

6

LDS

VCC1

-

FIN2

1

-

REF

+

FIN1

2

-

REF

+

E

3

F

4

REF

TB

5

TE-

REF

6

TE

7

REF

TESI

8

SCI

9

C7

0.1

TH

1

0

1

TD-

2

1

GEN

C10 180P

TD

3

1

REF

JP

4

1

-

TO

+

1

5

FD

6

1

FD-

1

C11

0.1

R6

1

15K

VREF

1

TO

2

FD FO (GAIN)

3

FO+

4

FO-

5

TR+

6

TR-

7 8 9

1

0 1

1

2

1

3

1

4

1

SL-

5

1

SL+

6

1

SLD

1

7

VCC1

1

8 9

1

STANDBY

2

0

Vref

2

MUTE

1

R56

6.8K

C33

0.47/50

C32

0

1

6

PHI

BHI

FE1

REF

VCR

JP

FOSTA

GEN

FA-

FE

2

9

0

C13 330P

R26 82K

C14

0.01 R25

1.5K

LD_M+ LD_M-

VCC4

SOL+

VCC3

(SPN)VCC2

SOLD

+

-

SOL-

-

2

GND GND

SP+ SP-

SPO

+

-

FSC

REF

FE-

1

MM+

0.01

59

VCR

TGL1 THDL

THD

REF

+

-

AGNDSPSPI

2

4

1

4 40 3

9

3

8 7

3 3

6

3

5 4

3 3

3

32

3

1

3

0

2

9

2

8 7

2

6 2

2

5

24

3 2 2

2

C34

0.33/50

2

6

LDO

+

RF

+

VCR

+

- + REF

REF

-

+

REF

-

TO

REF

+

GEN

REF

+

-

FA

7

1

8

R23 10K

R24 47K

IC3

M63001FP

FOCUS/TRACKING/SPIN/SLED DRIVER

C31

8

5

VR

LF2

+

-

REF

+

-

+

-

IC1 LA9241M SERVO AMP.

VCC

+

-

+

-

REF

GL

S.Q.R

REF

FE1

+

REF

3 2

24

2

C16

0.0047

R28 10K

R31

R27

1.2K

39K

C82 100/10

C77 100/10

220/4

7

5

REF1

DEF

HFL

DRF

FSTA

+

-

SPG

SP-

6 2

5

R29 56K

+B

C30

0.1

5

REF CV-

REF

C17

0.001

R30

6.8K

C18

6

VCC2

JP

0.47/50

5

FSS

2

EFBAL FOSTA TOSTA 2FREQ

LASER FSTA

8/12CM SLOF

+

-

+

-

JPCLO

10

REF

SPO

SLEO

2

8

7

2

R33

1.2K

CLK

CL

DAT

CE

DRF

FSC

CE

REF

CL

LATOH

REF

CV+ JP-

JP+

SLOF

4

OR

SLOF

+

-

+

-

REF

SL-

SLD

3

0

2

9

12

C19

1/50

C20

47/10

R32

C21

10K

0.0033

R34 1K

1

2

5

3

5

0

5

5 4 5

5

R45

4.7K

9

4

DEF

8

4

C29

C28

4.7/25

TBC

7

4

6

4

DGND

4

5

SLI

44

SLC

3

4

R40

5.6K

RFS-

2

4

-

+

RFSM

RF

41

HF TP1

CV+

40

CV-

3

9

SLOF

3

8

HFL

7

3

TES

3

6

TOFF

3

5

TGL

4

3

JP+

3

SL+

JP-

32

3

1

6

R36 220K

R35 220K

R37 82K

0.1

Q55

KRC102S

Q57

KRC102S

2

1

3

2

R54 10K

1

3

C26

0.033

R39 1K

R43 56K

C23

0.0027

R44 33K

R42 47K

C25 27P(CH)

R38 470

3

5

7

C35 1/50

D1 KDS193

+B

R47

10K

C37

R5

1K

CQ CK(DSP)

D_GND

RES(DSP)

DRF (ASP)

8

6

5

7

CNS12

P21 12 - B

TO DISPLAY PWB

0.022

SLD+

9

SLD-

1

0

PUIN SW

1

+B

CNP12

R3

1K

RWC(DSP)

R4

CO IN(DSP)

WRQ(DSP)

1K

SQ OUT(DSP)

4 3 2 1

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

1

23456

Figure 22 SCHEMATIC DIAGRAM (7/11)

– 22 –

Sharp CDC-1821-V Service manual

Specifications and Main Features

Frequently Asked Questions

User Manual