Sanyo DC-DA280 Service Manual

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Service Manual Micro Component System

FILE NO.

DC-DA280

(AU)

(KR)

LINE

PRESET

TUNER

/BAND

VOLUME

REPEAT/FM MODE

MEMORY

TUNING

SOUND

PRESET

REMOTE CONTROLLER RB-DA280AR

Specifications ................................................................... 1

System connections ......................................................... 1

What to do if ..................................................................... 1

Laser beam safety precaution .......................................... 2

CD pick-up maintenance .................................................. 2

CD player adjustments ..................................................... 2

Tape adjustments ............................................................ 3

Tuner adjustments ........................................................... 4

Exploded view

(Cabinet & Chassis) ...................................................... 5

(Tape mechanism) ........................................................ 9

Parts list

(Cabinet & Chassis) ...................................................... 6

(Tape mechanism) ........................................................ 9

PRODUCT CODE No.

129 622 05 (AU)

129 622 07 (KR)

IC block diagram & description ........................................ 9

LCD display description ................................................... 14

Wiring connection ............................................................ 15

Schematic diagram

(FRONT) ....................................................................... 16

(CD) ............................................................................... 18

(AMPLIFIER for AU) ...................................................... 22

(AMPLIFIER for KR) ...................................................... 24

(TUNER for AU) ............................................................ 26

(TUNER for KR) ............................................................ 28

Wiring diagram

(FRONT & CD) .............................................................. 20

(AMPLIFIER & TUNER for AU) ..................................... 30

(AMPLIFIER & TUNER for KR) ..................................... 32

(POWER TRANSFORMER) ......................................... 34

AU: This service manual consists of "DC-DA280U/AU" (Main unit : 129 621 05) and

"SX-DA280/UK" (Speaker system : 165 046 00).

KR: This service manual consists of "DC-DA280U/KR" (Main unit : 129 621 07) and

"SX-DA280/KR" (Speaker system : 165 046 05).

REFERENCE No.

SM

5810288

SPECIFICATIONS

Tuner

Reception frequency

FM : 87.5 - 108.0 MHz

AM: 522 - 1710kHz (9 kHz step)

520 - 1710kHz (10 kHz step)

CD player

Channels ................................ 2-channel stereo

Sampling frequency ............... 44.1 kHz

Pick-up ................................... Optical 3-beam semiconductor laser

Laser output ........................... 0.6mW(Continuous wave max.)

Wave length ........................... 790 nm

Wow and Flutter ..................... Below measurable limits

Cassette deck

Track system ......................... 4-track, 2-channel stereo

Frequency response .............. 80 Hz - 15 kHz

Signal to noise ratio ............... 40 dB

Wow and Flutter ..................... 0.15% (WRMS)

Fast forward / Rewind time .... Approx. 110 sec. (C-60)

General

Output power ......................... 4W x 2

(at 4 ohms, 10% distortion)

Outputs .................................. SPEAKERS : 4 ohms

PHONES : 8 - 32 ohms

Power requirements ............... AC 240V, 50Hz(AU)

AC 220V, 60Hz(KR)

Power consumption ............... 21 W

Dimensions (W x H x D) ........ Approx. 150 x 230 x 205 mm

Weight .................................... Approx. 2.3 kg

Speaker system

Type ....................................... Full range bass reflex

Unit used ................................ 10 cm cone type

Maximum

power-handling capacity ..... 8 W (peak)

Nominal impedance ............... 4 ohms

Dimensions (W x H x D) ........ Approx. 145 x 230 x 170 mm

Weight .................................... Approx. 1.2 kg (per speaker)

Specifications subject to change without notice.

SYSTEM CONNECTIONS

AM loop aerial

FM aerial

R ch speaker L ch speaker

To an AC outlet

WHAT TO DO IF

If the operation of the unit or display is not normal,

1. Disconect the mains lead.

2. Press the button on the unit for at least 30 seconds.

3. Connect the mains lead.

4. Operate the unit.

- 1 -

Video/ Auxiliary equipment

LASER BEAM SAFETY PRECAUTION

• Pick-up that emits a laser beam is used in this CD player section.

CAUTION :

USE OF CONTROLS OR ADJUSTMENTS

OR PERFORMANCE OF PROCEDURES

OTHER THAN THOSE SPECIFIED HEREIN

MAY RESULT IN HAZARDOUS RADIATION

EXPOSURE.

LASER OUTPUT .......... 0.6 mW Max. (CW)

WAVELENGTH ............. 790 nm

CAUTION – INVISIBLE LASER RADIATION WHEN OPEN AND

INTERLOCKS DEFEATED. AVOID EXPOSURE TO BEAM.

ADVARSEL – USYNLIG LASER STRÅLING VED ÅBNING, NÅR

SIKKERHEDSAFBRYDERE ER UDE AF FUNKTION, UNDGÅ UDS ÆTTELSE

FOR STRÅLING.

VARNING – OSYNLIG LASER STRÅLNING NÄR DENNA DEL ÄR ÖPPNAD

OCH SPÄRR ÄR URKOPPLAD. STRÅLEN ÄR FARLIG.

VORSICHT – UNSICHTBARE LASERSTRAHLUNG TRITT AUS, WENN

DECKEL GEÖFFNET UND WENN SICHERHEITSVERRIEGELUNG

ÜBERBRÜCKT IST. NICHT, DEM STRAHL AUSSETZEN.

VARO – AVATTAESSA JA SUOJALUKITUS OHITETTAESSA OLET ALTTIINA

NÄKYMÄTTÖMÄLLE LASERSÄTEILYLLE. ÄLÄ KATSO SÄTEESEEN.

(AU Only)

CD PICK-UP MAINTENANCE

About pick-up (Optical lens) Cleaning

Clean a lens with swab of the cotton which moistened it with alcohol, cleaning paper or cleaning disc appointed.

Specified cleaning disc : LC-1 (Part code : 645 026 1961 ..... manufactured by SANYO.)

Show a clean procedure in the following in reference by swab of cotton.

1. Cotton swab is wrapped with Cleaning paper.

2. Add the isopropyl alcohol.

3. Gently move the tip of cotton swab just like a draw a whirlpool from inside to outside on the surface of lens.

CD PLAYER ADJUSTMENTS

1. ADJUSTMENTS

(1) Confirm the tracking balance

1. Turn on the POWER switch.

2. Connect an Oscilloscope to TP2 (TE) and TP4 (VC).

3. Set the test disc.

4. Press "PLAY" button to turn into the "PLAY" mode.

5. Keep holding "SKIP" button down so as to be "SERCH" mode, then confirm that the oscilloscope waveform is symmetrical on the top and bottom in relation to 0V (VC).

- 2 -

200mV/div.

5ms/div.

CD PLAYER ADJUSTMENTS

(2) Checking the "eye" pattern

1. Switch "ON" the POWER.

2. Connect an oscilloscope to TP1 (RF) and TP4 (VC).

3. Load the test disc.

4. Press the PLAY button.

5. Check to be sure that the "eye" pattern is at the center of waveform and that the diamond shape is clearly defined.

6. Press the STOP button.

7. Turn off the POWER switch.

TP1

(RF)

TP4

(VC) a

+

-

OSCILLOSCOPE

OPENING EXPANDED b

TAPE ADJUSTMENTS

1. Azimuth Adjustment

• Be sure to clean the heads before attempting to make any adjustment.

• Be sure both channels (1 and 2) are the same level.

(Using a dual-channel oscilloscope)

• Be sure both channel's waveform are same for the phase matching.

• After completion of the adjustment, use the threadlock (TB-1401B) to

secure the azimuth adjustment screws.

1. Remove the cover deck as Fig.1.

2. Load a test tape (VTT-738 etc. : 10kHz) in the Deck.

3. Press the PLAY button. (Normal playback)

4. Use a + tip screwdriver to turn the screw for normal azimuth adjustment so that the left and right outputs are maximized at the same phase during normal playback. See Fig.2.

5. Adjust so that the waveforms for the left and right channels are in alignment.

NORMAL

Fig.1

Fig.2

2. Tape Speed Adjustment

• Connect the Frequency Counter to TAPE OUT.

Insert the test tape (MTT-111N, etc.; 3,000Hz) into the DECK.

Press the PLAY button. .

MOTOR hole for adjustment

Fig.3

Adjust a hole on the motor bottom so that a frequency counter reading of 3,000 } 5Hz is obtained.See Fig.3.

Press the STOP button, and eject the test tape.

3. Torque Measurement

Item

Test Cassette

PLAY/REV.

F.FWD/REW

Take-up Torque

PLAY:TW2111A(FWD)

30~65 grcm

55~140 grcm

Back tention

PLAY:TW2112A(FWD)

2~6 grcm

- 3 -

Pully tention

Driving power cassette:

TW-2412(PLAY)

50 grcm

TUNER ADJUSTMENTS

• Use a plastic screw driver for adjustments.

• MODE : TUNER

• Speaker impedance : 4 ohm

• TUNING

FM : 87.5 - 108MHz

AM : 522 - 1710kHz, 520 - 1710kHz

TP14 TP15

J2600

R2712

R2812

TP13

L_CH GND R_CH

XF233

R2304

J2500

J2501

C2302

J2503

T2002

Q2201

R2204

R2205

C2203

R2203 R2202

T2002

XF222

TP24

TP11

L2103

L2153

C2102

XF221

C2112

L2104

IC211

C2113

C2101

R2109

R2105

J2105

C2110 R2107 R2108

D2102

D2101

R2102 C2107 C2105

J2106

L2103

C2111

R2106

J2108

J2110

J2113

L2153

R2103

C2104

R2101

C2103

C2106

L2102

D2103

J2601

R2701

C2319 C2327

J2117

R2131

C2154

C2312

C2323

J2119

D2151

D2153

C2901

C2902

J2122

R2452

R2801

C2328

J2603

J2604

J2605

J2606

J2509

C2456

C2454 24

C2452

IC241

C2453

C2461

C2464

R2309

C2314

L2451

J2510

R2454

R2458

R2455

C2451

R2459

R2460

D2452 J2124

R2302

C2313

J2506

J2602

J2507

J2508

J2123

L2151

C2141

R2149

J2100

C2600

J2511 S2001

IC231 TP25 TP12 L2151 CT252

1. FM

Antenna : 75 Ω unbalanced, Modulation : 1 KHz

Dev. : 22.5kHz

RF Level : dBuV EMF, Output Level : about 30mV at TP13, TP14, TP15

Step

Adjusting

Circuit

IF(0V)

Adjustment

Connection

Input Output

FM Antenna SG=66dBuV/EMF

Alignment voltage IC231

3-22pin(TP24,25) is 0.0±0.05V

Frequency

98MHz

Adjustment

XF233

Remark

Alignment voltage IC231

3-22pin is 0.0±0.05V

Cover

Voltage

L2103

---

Connect Digital DC voltmeter to

TP11(H), TP12(E).

87.5MHz

108.0MHz

---

1.00±0.05V

5.30±0.50V Check Only

2. AM

Step

Adjusting

Circuit

Adjustment

Cover

Voltage

3 Tracking

Input

Loop Ant

---

Loop Ant

Anntena : IRE Loop(SG), Modulation : 1kHz, 30%

RF Level : dBuV EMF, Output Level : about 30mV at TP13, TP14, TP15

Connection SG

Frequency

Adjustment Remark

Output

Connect to VTVM point TP13(L) or TP14(R) and TP15(E).

450KHz at 999kHz

T2002 Maximum

L2153

Connect Digital DC voltmeter to

TP11(H )and TP12(E).

Connect to VTVM point TP13(L) or TP14(R) and TP15(E).

522kHz

1710kHz

603kHz

1404kHz

---

L2151

CT252

1.00±0.05V

7.10±0.50V Check Only

Maximum

- 4 -

EXPLODED VIEW (CABINET & CHASSIS)

- 5 -

PARTS LIST

PRODUCT SAFETY NOTICE

EACH PRECAUTION IN THIS MANUAL SHOULD BE FOLLOWED DURING SERVICING. COMPONENTS IDENTIFIED WITH

THE IEC SYMBOL !!!

IN THE PARTS LIST AND THE SCHEMATIC DIAGRAM DESIGNATED COMPONENTS IN WHICH

SAFETY CAN BE OF SPECIAL SIGNIFICANCE. WHEN REPLACING A COMPONENT IDENTIFIED BY !!!

, USE ONLY THE

REPLACEMENT PARTS DESIGNATED, OR PARTS WITH THE SAME RATINGS OF RESISTANCE, WATTAGE OR

VOLTAGE THAT ARE DESIGNATED IN THE PARTS LIST IN THIS MANUAL. LEAKAGE-CURRENT OR RESISTANCE

MEASUREMENTS MUST BE MADE TO DETERMINE THAT EXPOSED PARTS ARE ACCEPTABLY INSULATED FROM

THE SUPPLY CIRCUIT BEFORE RETURNING THE PRODUCT TO THE CUSTOMER.

CAUTION : Regular type resistors and capacitors are not listed. To know those values, refer to the schematic diagram.

Regular type resistors are less than 1/4 W Carbon type and Chip type resistors.

Regular type capacitors are less than 50 V and less than 1000 µ F type of Ceramic type, Electrical type and

Chip type.

PACKING & ACCESSORIES

REF.NO. PART NO. DESCRIPTION

614 321 4083 CARTON CASE(AU)

614 321 4106 CARTON CASE(KR)

614 319 7430 CUSHION,REAR

614 319 7447 CUSHION,FRONT

614 321 4182 INSTRUCTION MANUAL(AU)

614 321 4205 INSTRUCTION MANUAL(KR)

645 047 0509 POLY SHEET or

645 037 8102 POLY BAG,AC CODE

645 005 1227 ASSY,ANTENA,LOOP

645 046 8322 ASSY,ANTENA,LOOP

645 053 2542 REMOCON RB-DA280AR

614 318 9404 LID,BATTERY,SERVICE

614 319 6662 ASSY,BOX,SPEAKER(AU)

614 324 1768 ASSY,BOX,SPEAKER(KR)

CABINET & CHASSIS

REF.NO. PART NO. DESCRIPTION

614 319 6983 COVER,DECK

614 319 7003 DEC,WINDOW,DECK

614 320 3520 SPRING,WIRE,DOOR DECK

614 319 7096 LID,CASSETTE

614 323 2148 ASSY,PANEL,FRONT

614 319 7072 KNOB,VOLUME

614 303 1277 LATCH,CAM,DECK DOOR,LOCKING

614 309 7969 ASSY,GEAR,LID,CASSETTE

614 322 7717 BUTTON,OPERATION,11 KEYS

614 319 6945 BUTTON,RIGHT,4 KEYS

614 310 3899 SPACER,MECHA,MTG CD+DA11

614 307 2072 COVER,PICK-UP

614 319 7119 MOUNTING,CD

614 322 2125 ASSY,GEAR,LID,CD

614 303 0263 LATCH,PUSH,CD DOOR LOCKING

614 319 7201 SPRING,WIRE,DOOR CD

614 319 6938 BUTTON,POWER

614 307 8821 PULLEY

614 303 0256 LATCH,MAGNET

614 319 7102 LID,CD

614 319 7058 DEC,WINDOW,CD

614 316 1172 STOPPER

614 321 3925 ASSY,CABINET,REAR

614 307 9804 ASSY,MECHA,CDDA11N-SASH

FIXING PARTS

REF.NO. PART NO. DESCRIPTION

Y01 411 021 3503 SCR S-TPG BIN 3X10,

Y02

F-PANEL+LATCH,CAM

411 021 3503 SCR S-TPG BIN 3X10,

F-PANEL+DECK MECHA

Y03

Y04

614 129 9136

411 020 8905

LUG,LEAD FIX

SCR S-TPG BRZ+FLG 3X10,

F-PANEL+ASSY.GEAR,DECK

Y05

Y06

Y07

Y08

Y09

411 021 3503 SCR S-TPG BIN 3X10,

SWITCH,PWB+MTG CD

411 021 1806 SCR S-TPG BIN 2.6X10,

MTG CD+DA11

411 092 0906 WASHER Z 2.6X10X0.5,

MTG CD+DA11

411 020 8905 SCR S-TPG BRZ+FLG 3X10,

F-PANEL+ASSY.GEAR,CD

411 021 4906 SCR S-TPG BIN 3X20,

Y10

Y11

Y12

Y13

Y14

Y15

Y16

F-PANEL+MOUNTING,CD

411 184 0906 SCR S-TPG BIN 2.3X10,

LID CD+DEC WINDOW CD

412 032 6408 SPECIAL SCREW,REAR+P-TRANS

411 021 3503 SCR S-TPG BIN 3X10,

REAR+STOPPER

411 098 7800 SCR S-TPG FLT 3X12,

REAR+MTG(L/R)

411 021 4906 SCR S-TPG BIN 3X20,

REAR+PANEL,FRONT

411 021 3503 SCR S-TPG BIN 3X10,

REAR+ANT TERMINAL

REAR+AUDIO TERMINAL

411 021 3503 SCR S-TPG BIN 3X10,

REAR+MTG CD

57 or

ELECTRICAL PARTS

REF.NO. PART NO. DESCRIPTION

53 or

614 322 2279 ASSY,WIRE,AMP-TAPE MECHA

614 322 2439 FLEXIBLE FLAT CABLE,

FRONT-AMP

614 313 7023 FLEXIBLE FLAT CABLE,

CD-CD MECHA

614 310 5459 FLEXIBLE FLAT CABLE,

CD-CD MECHA

614 316 8041 ASSY,WIRE,CD-CD MECHA

423 016 7908 FUSE 250V 2.5A

645 051 8744 TRANS,POWER(AU)

645 051 8720 TRANS,POWER(KR)

645 032 1887 CORD,POWER-2.0MK(AU)

645 047 8055 CORD,POWER-1.8MK(KR)

645 039 2528 CORD,POWER-1.75MK(KR)

614 322 2255 ASSY,WIRE,R/P HEAD-AMP

423 016 9407 FUSE 250V 0.25A(KR)

- 6 -

PARTS LIST

FRONT P.W.BOARD ASSY

REF.NO. PART NO. DESCRIPTION or or

S6211 or or

S6212 or or

S6213 or or

S6214 or or

S6215 or

S6113 or or

S6114 or or

S6115 or or

S6116 or or

S6117 or or

S6210 or

S6216 or or

SE601

X6102 or

Q6108 or or or or

S6001

S6110 or or

S6111 or or

S6112 or or

AC601

AH601

AS601

CN601

D6010

D6110

D6111

D6112

D6113

IC601

L6010

LCD60

Q6107 or or

614 324 1140 ASSY,PWB,FRONT(Only Initial)

614 320 3469 COVER,LED

614 320 3483 HOLDER,LCD

614 314 9286 DEC,SHEET,LCD

645 012 5324 SOCKET,FPC 28P

407 012 4406 DIODE 1SS133

407 225 7300 LED LT03B3-43-URE1

407 012 4406 DIODE 1SS133

410 432 5700 IC LC867232A-5Z21

645 001 5441 INDUCTOR,2.2U K

645 050 7397 LCD

405 141 3307 TR KTC3198-GR

405 141 3208 TR KTC3198-Y

405 019 2708 TR 2SC536-F-NP

405 019 3804 TR 2SC536-G-NP

405 143 8706 TR KTC3199-GR

405 011 8500 TR 2SC1740S-R

405 011 8609 TR 2SC1740S-S

405 017 9600 TR 2SC3330-T

405 017 9709 TR 2SC3330-U

645 054 1230 SWITCH,ROTARY(ENCODER)

614 220 5471 SWITCH,TACT

614 240 1002 SWITCH,TACT