Denon D-A03 Service Manual

Hi-Fi Personal Audio System

AUXFM/AM

C D

POWER

VOLUME

SDB

TUNING/ PRESET

REMOTE SENSOR

PHONES

VERTICAL LOADING SYSTEM COMPACT DISC PLAYER

PERSONAL AUDIO SYSTEM / CD STEREO RECEIVER

40-STATION PRESET MEMORY 6-MODE PRESET EQUALIZER

REMOTE CONTROL UNIT

SERVICE MANUAL

For Hong Kong,

U.S.A. and Canada model

MODEL

D-A03

PERSONAL AUDIO SYSTEM

VERTICAL LOADING SYSTEM COMPACT DISC PLAYER

POWER

PERSONAL AUDIO SYSTEM/CD-MD RECEIVER

D-A03

MENU TUNING

SLEEP TIMER OFF TOTAL

RANDOM INTOR SCAN ROCK POP JAZZ DANCE FLATT

PHONES

power loading mechanism

REMOTE SENSOR

Hong Kong model U.S.A. and Canada model

C D

FM/AM

M D

AUX

VOLUME TUNING/ PRESET

SDB

N.SPEED

HI.SPEED

REC MODE

REC

E Q

TOC/NAME

CLEAR

ENTER

DISPLAY

TIMER/DELETE

PLAY MODE

PROG.

REMOTE CONTROL UNIT

●●

● Some illustrations using in this service manual are slightly different from the actual set.

●●

14-14, AKASAKA 4-CHOME, MINATO-KU, TOKYO 107-8011 JAPAN

Telephone: 03 (3584) 8111

X0130 337 NC 0112

SAFETY PRECAUTIONS

The following check should be performed for the continued protection of the customer and service technician.

LEAKAGE CURRENT CHECK

Before returning the unit to the customer, make sure you make either (1) a leakage current check or (2) a line to chassis resistance check. If the leakage current exceeds 0.5 milliamps, or if the resistance from chassis to either side of the power cord is less than 460 kohms, the unit is defective.

SPECIFICATIONS (There is no MD Section in the U.S.A. and Canada model)



 Amplifier Section



Practical maximum output: Front speaker 11W (5.5W + 5.5W EIAJ) Audio input/output jacks: MONO output terminal, AUX input terminal, 3.5mm headphone jack



 Tuner Section



Receive frequency bands: FM: 87.50MHz to 108.00MHz

Receive sensitivity: FM: 1.5µV/75Ω/ohm

FM stereo separation: 35 dB (1 kHz)

AM: 520kHz to 1710kHz (U.S.A. and Canada model)

522kHz to 1611kHz (Hong Kong model)

AM: 20µV

D-A03



 CD Player Section



Wow and flutter: Below measurement limits (±0.001% W peak) Sampling frequency: 44.1kHz Light source: Semiconductor laser



 MD Section (Hong Kong model)



Format: MiniDisc digital audio system Wow and flutter: Below measurement limits (±0.001% W peak) Sampling frequency: 44.1kHz Recording method: Magnetic modulation overwrite method Light source: Semiconductor laser



 Clock and Timer Section



Clock system: Within one minute per month Timers: Everyday timer (One)

Recording timer (One) Sleep timer (120 minutes, MAX)



 Common Section



Power supply: 120V AC, 60Hz (U.S.A. and Canada model)

115/230V AC, 50/60Hz (Hong Kong model)

Power consumption: 29W

Maximum external dimensions: 390 (W) × 280 (H) × 165 (D) mm (Including feet, knobs and terminals) Mass: 5.3kg

Approximately 0.8W during standby



 Remote Control (RC-910: Hong Kong model, RC-911: U.S.A. and Canada model)



Remote control system: Infrared pulse Power supply: 3V DC (using two R6P/AA type batteries) Maximum external dimensions: 49 (W) × 140 (H) × 30 (D) mm Mass: 120g (including batteries)

* For improvement purposes, specifications and functions are subject to change without advanced notice.

Licensed product based on U.S. and overseas patents of Dolby Laboratories Licensing Corporation.

DISASSEMBLY

(Follow the procedure below in reverse order when reassembling)

1. Rear Cover & Front Panel

1) Remove 14 rear screws 1 and 4 (E3: 2) bottom screws

on the Rear Cover.

2) Disconnect connectors and wire The Rear Cover and Front Panel can be detached respectively.

~ 7 on the Front Panel.

D-A03

5P Connector

6P Connector

2. Main P.W.B.

1) Remove 5 screws 8.

2) Disconnect 2 FFCs, 10 connectors on the Main P.W.B.

4P Connector

Connectors

11P Connector

1P Earth Lug

FFC

3P Connector

Main P.W.B.

Connectors

10P Connector

FFC

3. MD Mecha.

1) Remove 3 screws 9.

2) Disconnect 1 each FFC and connector on the Main P.W.B.

4. CD Mecha. Chassis

1) Remove 4 each screws  and  from the front side to detach the CD Door Lens and CD Door Bracket.



2) Remove 6 screws

and take off the Main Chassis.

D-A03

Connector

MD Mecha.

FFC



CD Door Bracket

CD Door Lens

5. CD Mecha.

1) Remove 4 screws ! fixing the Bracket.

2) Detach the CD Mecha. upward as shown to the arrow direction.

Rubber (Green)

Collar (White)





!



Main Chassis



!

Rubber (Blue)

Rubber (Green)

6. Speaker Box (L & R)

1) Remove 4 screws ".

2) Disconnect 2 connectors.

D-A03

Speaker Box (L)

Speaker Box (R)

"

7. Tuner P.W.B.

1) Remove 2 screws #.

8. Power P.W.B.

1) Remove 6 screws $.

2) Disconnect 1 connector.

"

Tuner P.W.B.

#

Power P.W.B.

$

Connector

ADJUSTMENT



 TUNER SECTION



Connections and adjustment point

AM SG

Modulation frequency: 400Hz Modulation factor: 30%

D-A03

Test loop antenna

60cm

Loop antenna

Digital Voltmeter

To Output Terminal

Distortion Meter

To Output Terminal

To TP

Modulation frequency: 1kHz L+R: 90% (67.5kHz Dev.) Pilot: 10% (7.5kHz Dev.) 75kHz Dev.: 100%

FM stereo modulator

FM SG

Antenna Terminal

AM FMG

TUNER PWB

T403 T402

T401

T404

75 ohms Coaxial Cable

TC401

RA25

R419

Rear Panel Side

Separation Meter or

Electronic Voltmeter

FM ALIGNMENT (BAND BUTTON: FM, AUTO)

Step

Alignment

Item

FM DC

Balance

Tune-in Point

(Channel Setting)

98 MHz FM SG 98 MHz

Measuring Equipment

Frequency Level Modulation Connect to

Input Output

60 dB

1 kHz

75 kHz dev

FM Ant

Te r m i n a l

AM ALIGNMENT (BAND BUTTON: AM)

Alignment

Step

Item

1 Band Edge

2 IF No Broadcast Area AM SG (900 kHz)

3Tracking

4Tracking

5 Repeat Steps 3 and 4, and set the output to maximum.

Tune-in Point

(channel Setting)

E1:522kHz

E3:520 kHz

E1:1611kHz

E3:1710 kHz

E1:603 kHz E3:600 kHz

E1:1404 kHz E3:1400 kHz

Measuring Equipment

AM SG

Frequency Level Modulation Connect to



E1: 603 kHz E3: 600 kHz

E1: 1404 kHz E3: 1400 kHz

Input Output

No AGC

Effects

No AGC

Effects

No AGC

Effects

400 Hz 30% Loop Ant

Measuring

Equipment

Digital

Vol tm et er

Measuring Equipment

Digital

Vol tm et er

Electronic Vol tm et er

Connect to

Both Leads

of R425

Connect to

Both Leads of R419

LINE 1 Output

Te r m i n a l

LINE 1 Output

Te r m i n a l

LINE 1 Output

Te r m i n a l

Align Part Set Value Remarks

T404

Align Part Set Value Remarks

T403



T401

T402

TC401

E1: 1.3±0.2V E3: 1.0±50mV

E1: (7.6±0.5V) E3: (8.3±0.5V)

20mV

Approx.

Maximum

Output

Maximum

Output

Maximum

Output

Align with Mono

Modulation Signal



No Adjustment

Required



CD SECTION

1. RF level Confieming

D-A03

Connection

Oscilloscope

CD Servo Micon PWB

0.2µs/div

50mV/div

• Set input mode to ALTERNATE or CHOPPER.

0.5µs/div

RF0

REF

Probe

10:1

CheckOscilloscope

−

Step

1. Press CD Play/Pause ( ) button to make it playback state.

2. Check RF level with oscilloscope.

3. Confirm that the waveform is in good

A=0.8~1.2V

shape.

(

eye pattern in center must be

able to discriminate clearly.)

Eye Pattern

2. Pickup

Connection

Step

1. Press CD Play/Pause ( ) button to make it playback state.

2. Measure Iop.

• Since this CD system has the built-in automatic adjustment function, re-adjustment is not necessary when replacing the

pickup. Therefore, any combination of PWB and pickup can be made freely. As the automatic adjustment is performed every time the disc is changed, each disc can be played in the most appropriate condition.

BLOCK DIAGRAM

D-A03

4p Terminal P.W.B.

LCD 8com,60seg

TUNER UNIT

LCD Controller LC75811W

FM FRONTEND KCF216

DISPLAY UNIT

BACK light

REMOTE Sensor

MICRO COMPUTER M38199

TACT KEY

Reset

ELE.VR SYSTEM LC75342M

MUTING

MAIN UNIT

DSP TC94A14FA

74VHC08

Door driver BA6286

Motor driver LA6558

RF AMP TA2157F

CD DOOR

CD MECHA CD4LXWNK

MD UNIT MDM08AD

(Hong Kong Model)

AUX IN

SUB WOOFER

FM IF/DET/MPX AM RF/IF/DET LA1844

PLL LC72131

un5V(MICON)

(tuner,AUDIO)

(MD)

(CD)

(There is no MD Section in the U.S.A. and Canada model)

Power AMP BA5415

10V

- |<| Reg.

AC IN

TEST MODE (There is no MD Section in the U.S.A. and Canada model)

From power off state to TEST mode

To enter into the TEST mode, plug the AC cord to the wall outlet while pressing the CD PLAY (CD ) button and TUNER button simultaneously. The version information is displayed initially. Thereafter press the SKIP UP/DOWN button to select the TEST mode and then press the CD STOP button to determine it. Press the DIRECT key during version display to obtain the designated TEST mode directly.

TEST MODE

No. TEST MODE DIRECT DISPLAY

1 CD TEST CD PLAY (CD ) CD MENU

2 MD TEST MD PLAY (MD ) MD MENU 3 TUNER TEST TUNER TUN MENU

Cancelling the TEST Mode

In each TEST mode, press the POWER button to display COMPLETE for 1 second and then cancel the TEST mode. In the MD TEST mode, press the POWER button again.

D-A03

Version display

SKIP-DOWN

SKIP-UP

Test mode

With SKIP-UP button

Version display to CD-PLAY

SKIP-DOWN

Version display to MD-PLAY

SKIP-DOWN

Version display to TUNER

1. CD test

Outline: Readout of the set value after automatic adjustment (for judging difference from initial value)

Forced operation of pickup (Inner/Outer circumference feed) During the PLAY mode, the number of errors accumulated for 10 seconds (750 frames) is displayed.

Basic CD operation by CD-PLAY button During the TEST mode, the display is turned on and the following buttons become effective.

N: Normal speed

TNO Display

Operation

1. CD-PLAY: CD operation according to steps STEP 1: LD ON by pressing CD PLAY button in the stop mode STEP 2: Focus On by pressing CD PLAY button in STEP 1 STEP 3: CLV servo ON by pressing CD PLAY button in STEP 2 STEP 4: Tracking servo ON by pressing CD PLAY button in STEP 3 STEP 5: Sub-code readout/display by pressing CD PLAY button in STEP 4

* Keep pressing the CD PLAY button for more than 1 second to shift to STEP 5 directly.

2. CD STOP : To stop the playback operation (shifting from each step to the stop

3. CD SKIP-UP (

4. CD SKIP-DOWN ( ) : Forcible shift in the pickup REV direction

5. TUNER : Automatic adjustment (at the present pickup position)

6. POWER : Canceling the test mode

7. VOLUME UP/DOWN : To read the coefficient register while the CD operation is stopped/

8. CD OPEN/CLOSE : Normal open/close operation

) : Forcible shift in the pickup FWD direction

H: Double speed Time Display

mode) / To reset display (during display of coefficient)

Sliding is stopped when the PU_IN switch is turned on.

To display the error number during CD playback

D-A03

Readout of the adjusted value

Press the VOL.UP/DOWN button during the stop mode to read the following items. Press the CD-STOP button to return to the normal display.

Item Display Max Type Min

Focus balance _ _ F B : x x 7 F 0 0 8 0 Focus gain _ _ F G : x x 1 F 0 0 E 0 Tracking balance _ _ T B : x x 7 F 0 0 8 0 Tracking gain _ _ T G : x x 1 F 0 0 E 0 Foucus offset F O F F : x x 7 F 0 0 8 0 Tracking offset T O F F : x x 7 F 0 0 8 0 RFRP R F R P : x x 7 F 0 0 8 0

Even if the CD-PLAY button is pressed initially, automatic adjustment is not obtained. Press the TUNER button in the stop mode to gain CD-PLAY for automatic adjustment. Thereafter press the CD-STOP button to stop automatic adjustment. Press the VOL. UP/DOWN button to display automatically adjusted values.

Readout of error numbers

Press the VOL.UP/DOWN button during playback to display the number of errors accumulated for 10 seconds (750 frames). Press the CD-STOP button during ERR display to return to the normal TEST mode display.

Double-speed mode

Press the MD-REC button in the stop mode to switch to the double/constant-speed mode cyclically. During the double-speed mode,

lights up.

CD TEST

D-A03

STEP NO Display

TNO Display

N:NORMAL SPEED H:HIGH SPEED

Time Display

N H

STEP NO Display

TNO Display

Time Display

Coefficient name Coefficient

2. MD test mode (Refer to page 12 and after.)

Button used during MD test mode

Lights when double-speed mode

1.STEP NO. : 0 when stopped

2.Time display: Blank from the stop mode to STEP 4

Readout of coefficient

Button Name Function

CD-PLAY To feed the menu of the TEST mode (1) (to feed the menu relating to adjustment and EEPROM) TUNER To feed the menu of the TEST mode (2) (to feed the menu mainly relating to continuous

playback and recording) AUX To feed the menu of the TEST mode (3) (to feed the menu of INNER and JUMP SELECT, etc.) MD REC To feed the menu of the TEST mode in reverse (to feed the menu in each test mode in reverse) MD-PLAY To select, determine and start the menu MD-STOP To stop each test item and to select the next upper menu.

(M-) SKIP-UP ( ) 1. Forced slide feeding (FWD) 2. JUMP operation 3. Address setting value up, etc.

(M-) SKIP-DOWN ( ) 1. Forced slide feeding (REV) 2. JUMP operation 3. Address setting value down, etc. VOL-UP Set value UP VOL-DOWN Set value DOWN CD-STOP 1. To switch laser by EJECT 2. To switch display during continuous playback, etc. POWER To operation mode without automatic adjustment MD-EJECT Normal EJECT operation

MD SECTION

Enter the test mode, adjust or set as shown in the following table according to the repair operations.

D-A03

Execution item

required

Repair Operations

PICK replacement

HEAD replacement

MECHANISM replacement

MAIN PWB replacement

MD microcomputer replacement

MD LSI replacement

RF IC replacement

EEPROM IC replacement

number to and indicate the order of inplementation.

1 8 9

TEMP

basic

setting

TEMP EEPROM_SET TEST-CANCEL AUTO-YOBI AUTO-ADJ AUTO-AFB TEST-CANCEL TEST-PLAY TEST-REC

Checking EEPROM

setting

Writing the

EEPROM

setting

2 3 4 5 6 7 8

AUTO-YOBI

adjustment

"−" is an item that you don’t have to execute.

The EEPROM writing result is shown at the end of the test mode OK_EEPROM: "SET" and "YOBI COMPLETE" were wirtten normally WR_EEPROM: Although "SET" was written normally, it was not written in the "YOBI COMPLETE" state

Perform "AUTO-YOBI" adjustment. After making a normal adjustment. Write the preliminary adjustment into the EEPROM.

NG_EEPROM: "SET" could not be written.

Check the connection between the MD microcomputer and the EEPROM.

AUTO-

adjustment

3 4 5 6 7 8

4 5 6 7 8 9

1 3 4 5 62

4 5 6 7 8 9

AUTO-AFB adjustment

Writing the

EEPROM

setting

Operation check

3 42

1. Preparation for adjustment

Test disc

Type Test Disc 1 High reflection disc TGYS1 (SONY) for playback 2 Low reflection disc Mini disc for recording 3  Transparent disc for head alignment

2. Test Mode

Test mode setting method

1. While the CD PLAY (CD and then MD PLAY button. (State A is changed to state B.)

2. Insert the playback-only disc 1 (high reflection disc) or the recordable disc 2 (low reflection disc).

(State is changed to

Above procedures will set the unit to the test mode.

tsm 22 e : TEST MODE represents version of MD microcomputer.

STOP state

EJECT (When the MD STOP button is pressed in the C state, the indication A is

AUT AJST

) button and the TUNER button are pressed down together, press the POWER button

represents version of EEPROM data.

restored. To restore C again, press the CD PLAY (CD ) button.)



 Entering the specific mode



Whenever the CD PLAY (CD ) button is pressed, the mode is changed. If the REC button is pressed instead, the mode will change in the opposite order.

D-A03

(AUTO prelimiraty adjustment)

ERR DATA

(ERR DATA)



 Cancel of test mode



AUT YOBI

EEPROM_SET

(EEPROM setting)

AUTO AJST

(AUTO adjustment)

MAN AFB

(MANUAL advanced

AFB adjustment)

AUT AFB

(AUTO AFB adjustment)

MNU AJST

(MANUAL AFB adjustment)

RST YOBI

(RESULT YOBI)

(MANUAL prelimiraty adjustment)

RESULT

MNU YOBI

The mode is written on EEPROM by pressing the POWER button. If the POWER button is pressed again, the unit returns to the normal state. * Before pressing the POWER button, make sure that the AUTO pre-adjustment, AUTO adjustment, and AUTO AFB

adjustment have been completed.

* After the value of EEPROM is changed or the AUTO pre-adjustment, AUTO adjustment, and AUTO AFB adjust-

ment are performed again, write on EEPROM by pressing the POWER button. (When the POWER button is pressed, data is written on EEPROM.)

* When the value of EEPROM has been changed, write the data on EEPROM once. To preform adjustment using

the data, set the unit to the TEST mode again, perform AUTO pre-adjustment, AUTO adjustment, and AUTO AFB adjustment, and then write the data again on EEPROM.

• Test mode

1. Laser Measurement Mode • To Temp Setting (EEPROM_SET)

• To Control Setting (EEPROM_SET)

• Laser power measuring (Rec/Play power)

2. Auto Adjust Mode • Performs automatic adjustment (after adjustment, grating adjust mode)

3. AFB Adjust Mode • Performs focus adjustment RST YOBI • Not necessary in servicing, do not enter in these modes RESULT MNU YOBI MNU AJST ERR DATA

4. EEPROM Setting Mode • Changes various digital parameters manually

5. Auto Pre-adjust Mode • Performs automatic pre-adjustment

6. Test-play Mode • Performs continuous play from the address defined

• C1 error rate, ADIP error rate measurements

7. Test-rec Mode • Performs continuous recording from the address defined

1. EJECT mode

Step No. Setting Method Remarks Display

Step 1 Test mode eject status _ _ EJECT_ _ _ Step 2 Press CD STOP button Playback power output status ppw_ _ _ _ _ _ _ Step 3 Press CD STOP button Recording power output status rpw_ _ _ _ _ _ _ Step 4 Press CD STOP button Not for service, don't enter xpw_ _ _ _ _ _ _ Step 5 Press TUNER button To Temp Setting of EEPROM_SET

(Refer to Temp Setting of EEPROM)

Pickup Laser Power Check

The laser power in recording/playback can be checked with a laser power meter. However, only confirmation should be performed as the measurement might be inconstant. Change the pickup only when it is largely out of spec.

Reference value (at the room temperature 25°C) At playback (ppw): 0.72±0.1 mW At recording (rpw): 5.5±0.5 mW

Note: Be careful not to stare at laser emission as your eyesight may be damaged.

2. AUTO pre-adjustment mode (Low reflection disc only)

Step No. Setting Method Remarks Display

Step 1 Test mode stop status tsm e Step 2 Step 3 Press REC button Auto pre-adjust menu _AUT_YOBI_ Step 4 Press ENTER button change as follows during auto-adjust :_ _ _ _ _ _

Step 5 Grating adjustment _COMPLETE_

Step 6 Adjust value output Can’t_ADJ.

3. AUTO adjustment mode

Step No. Setting Method Remarks Display

Step 1 Test mode stop status tsm e Step 2 Press CD PLAY button Auto adjust menu AUTO_AJST_ Step 3 Press MD PLAY button With high reflection disc, change as follows : _ _ _ _ _

Step 4 Adjust value output For grating adjustment _ COMPLETE _

Step 5 Continuous play (pit part) C1 error check s c

Step 6 Press CD STOP button ADIP error check a a

Step 7 Adjust value output Can’t_ADJ.

Press once the CD PLAY button

End of adjustment If the adjust OK, go to Step 5

Adjust value output Press STOP button Step 3

Press STOP button Return to Step 3

: Adjustment name

End of adjustment If the adjust OK, go to Step 4

Press MD PLAY button Step 5 Press MD STOP button Step 2

Continuous play (groove part) a c

Press MD STOP button Returns to Step 2

: Adjustment name, : Measured value, : Address

Auto adjustment menu AUTO_AJST_

HAo TCO

If the adjust NG, go to Step 6

PEG---HAG With low reflection disc, change as follows PEG---LAG

If the adjust NG, go to Step 7

D-A03

4. AFB Adjust Mode

Step No. Setting Method Remarks Display

Step 1 Test mode stop status tsm e Step 2 Press CD PLAY button 2 times AFB adjust menu _AUT_AFB_ Step 3 Press MD PLAY button FAB _ Step 4 Adjust value output

Press MD STOP button Returns to Step 2

, : Measured value