How it Works
Denon
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D-AJ03 SM
Service Manual
53 pgs5.83 Mb1
Table of contents
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Denon D-AJ03 SM, D-AJ03 Service Manual

For U.S.A. & Canada model
SERVICE MANUAL
Ver. 1
MODEL
D-AJ03
PERSONAL AUDIO SYSTEM
注 意
For purposes of improvement, specifications and
●
design are subject to change without notice.
Please use this service manual with referring to
●
the operating instructions without fail.
●
Some illustrations using in this service manual are slightly different from the actual set.
16-11, YUSHIMA 3-CHOME, BUNKYOU-KU, TOKYO 113-0034 JAPAN
● 本機の仕様は性能改良のため、予告なく変更すること があります。
● 補修用性能部品の保有期間は、製造打切後
●
修理の際は､必ず取扱説明書を参照の上、作業を行って, ください。
● 本文中に使用しているイラストは、説明の都合上現物 と多少異なる場合があります。
X0178V.01 DE/CDM 0307
8年です。
D-AJ03
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.
LASER RADIATION
Donotstareintobeamorviewdirectlywithopticalinstruments,class3Alaserproduct.
500V
1M
2
(1)
(2)
(1)
(2)
2

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
2
on the Rear Cover.
3
2) Disconnect connectors and wire The Rear Cover and Front Panel can be detached respectively.
~ 7 on the Front Panel.
D-AJ03
2
3
1
1
4
5P Connector
5
8P Connector
12P Connector
2. Main P.W.B.
1) Remove 5 screws 8.
2) Disconnect 2 FFCs, 8 connectors on the Main P.W.B.
Main P.W.B.
11P Connector
6
1P Earth Lug
7
Connectors
1
8
8
FFC
3P Connector
Connectors
3
FFC
3. CD Mecha. Chassis
1) Remove 4 each screws ı and ıı from the front side to
10
detach the CD Door Lens and CD Door Bracket.
12
ıˇ
2) Remove 6 screws
and take off the Main Chassis.
CD Door Bracket
11
11
ıı
12
ıˇ
Main Chassis
D-AJ03
4
CD Door Lens
10
ı
4. CD Mecha.
1) Remove 4 screws ı fixing the Bracket.
2) Detach the CD Mecha. upward as shown to the arrow direction.
13
Rubber (Green)
Collar (White)
10
11
ıı
ı
ı
13
ı
13
Rubber (Blue)
Rubber (Green)
4
5. Speaker Box (L & R)
1) Remove 4 screws ı.
2) Disconnect 2 connectors.
14
Speaker Box (L)
ı
14
ı
14
D-AJ03
5
Speaker Box (R)
6. Tuner P.W.B.
1) Remove 2 screws ı.
15
7. Power P.W.B.
1) Remove 6 screws ı.
2) Disconnect 1 connector.
16
Power P.W.B.
Tuner P.W.B.
ı
15
ı
16
ı
16
Connector
5
6

ADJUSTMENT

TUNER SECTION
Connections and adjustment point
AM SG
Modulation frequency:400Hz Modulation factor:30%
D-AJ03
6
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
R425
R419
Rear Panel Side
Separation Meter or Electronic Voltmeter
FM ALIGNMENT (BAND BUTTON: FM, AUTO)
Step
1
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
1kHz
75 kHz dev
FM Ant
Terminal
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)
E3:520 kHz
E3:1710 kHz
E3:600 kHz
E3:1400 kHz
Measuring Equipment
AM SG
AM SG
Frequency Level Modulation Connect to
E3: 600 kHz
E3: 1400 kHz
Input Output
No AGC
Effects
No AGC
Effects
No AGC
Effects
400 Hz 30% Loop Ant
400 Hz 30% Loop Ant
400 Hz 30% Loop Ant
Measuring Equipment
Digital
Voltmeter
Measuring Equipment
Digital
Voltmeter
Electronic Voltmeter
Electronic Voltmeter
Electronic Voltmeter
Connect to
Both Leads
of R425
Connect to
Both Leads of R419
LINE 1 Output
Terminal
LINE 1 Output
Terminal
LINE 1 Output
Terminal
Align Part SetValue Remarks
T404
Align Part Set Value Remarks
T403
E3:1.0±50mV
E3:(8.3±0.5V)
T401
T402
TC401
20mV
Approx.
Maximum
Output
Maximum
Output
Maximum
Output
Align with Mono
Modulation Signal
No Adjustment
Required
6
CD SECTION
1. RF level Confieming
Connection
Oscilloscope
D-AJ03
7
CD Servo Micon PWB
VH
0.2 s/div
50mV/div
• Set input mode to ALTERNATE or CHOPPER.
or
0.5 s/div
RF0
V
REF
Probe
10:1
CheckOscilloscope
+
Step
1. Press CD Play/Pause ( ) button to make it playback state.
A
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.
R108
• 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.
7
BLOCKDIAGRAM
CD DOOR
Motor driver
Door driver
BA6286
MAIN UNIT
CD MECHA
CD4LXWNK
LA6558
RF AMP
DSP
TC94A14FA
TA2157F
AUX IN
SUB
WOOFER
AC IN
- |<| -
D-AJ03
Reg.
8
TACT KEY
REMOTE
Sensor
MICRO
COMPUTER
M38199
LCD
8com,60seg
BACK light
DISPLAY UNIT
LCD
Controller
LC75811W
Reset
ELE.VR SYSTEM
LC75342M
MUTING
FM FRONTEND
KCF216
Power AMP
BA5415
un5V(MICON)
FM IF/DET/MPX
AM RF/IF/DET
LA1844
6V
10V
(tuner,AUDIO)
(MD)
PLL
6V
8V
(CD)
LC72131
(There is no MD Section in the U.S.A. and Canada model)

BLOCK DIAGRAM

TUNER UNIT
4p
Terminal
8
P.W.B.
D-AJ03

TEST MODE

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 4
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.
TUNER TEST
DISPLAY TEST
TUNER
VOL DOWN
TUN MENU DISPLAY MENU
9
Version display
SKIP-DOWN
SKIP-UP
SKIP-UP
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
SKIP-DOWN
Fig.20 Test Mode Menu
9
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.
Error Display
N H
Time Display
N:NORMAL SPEED
TNO Display
STEP NO 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 (
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
H:HIGH SPEED
mode) / To reset display (during display of coefficient)
) : Forcible shift in the pickup FWD direction
) : Forcible shift in the pickup REV direction
Sliding is stopped when the PU_IN switch is turned on.
To display the error number during CD playback
D-AJ03
10
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.
10
CD TEST
ANA
STEP NO Display
STEP NO Display
Error Display
N H
N:NORMAL SPEED
TNO Display
H:HIGH SPEED
TNO Display
Time Display
Time Display
D-AJ03
1.STEP NO. : 0 when stopped
2.Time display: Blank from the stop mode to STEP 4
11
Coefficient name Coefficient
Readout of coefficient
11
D-AJ03
12

TROUBLESHOOTING OF CD

CD SECTION
When the CD does not function
When the CD section does not operate when the objective lens of the optical pickup is dirty, this section may not operate. Clean the objective lens, and check the playback operation. When this section does not operate even after the above step is taken, check the following items. Remove the cabinet and follow the trouble shooting instructions. “Track skipping and/or no TOC (Table of Contents) may be caused by build up of dust other foreign matter on the laser pickup lens. Before attempting any adjustment make certain that the lens is clean. If not, clean it as mentioned below.”
Turn off the power, and wipe the lens softly using a cleaning paper moistened with commercially available cleaning solution so as not to damage it. Be careful not to touch the lens with bare hands.
Dust gradually accumulates on the objective lens during use, and it may degrade performance. To avoid this problem, use a cleaning disc designed for CD optical pickup lenses.
When a disc is loaded, the power is turned on, and the CD (stop) button is pressed, is +7.2V applied to the collector of TR102 and +5.0V to the emitter ? Is +3.3V applied to pin 22 on IC145 ?
Is the voltage applied as shown in the wiring diagram ?
Yes
Is the laser lit in the CD test mode 1 ?
Yes
Does the unit switch from the CD test mode 1 to 2 ?
Yes
When the CD test mode is changed from 2 to 3, does the disc motor rotate properly ?
Yes
Is the output at pin 19(HF) of IC146 flat in the CD test mode 4 ?
Yes
Is sound output when the pickup lens is moved to where a track is located by pressing the in the CD test mode 5 ?
When the unit is turned off and on again, is it initialized ?
(button) and (button)
Yes
Yes
No
No
No
No
No
No
No
Check the power circuit in the main unit.
Refer to "The laser does not light up".
Refer to "Out of focus".
Refer to "The disc motor CLV servo is defective".
Refer to "HF is abnormal".
Does the sled motor run ?
Yes
Refer to "No sound is heard".
Has the optical pickup returned to the inner periphery position ?
Yes
The optical pickup in-switch is defective (ON state).
No
Refer to "The sled motor does not run".
No
Is the optical pickup in switch in the OFF state ?
OFF
Check the microcomputer PWB.
ON
The optical pickup in switch is defective.
Are tracks played from the track 1 in ascending order by pressing the
Normal
(button) ?
Yes
No
12
Refer to "Track search is impossible".
The laser does not light up
Is 1.5V applied to the LDO terminal of pin 7 of IC146 ?
Yes
Is +1.8V applied to the collector of TR101 ?
Yes
Is +1.8V applied to pin 10 of CX151 ?
Yes
The optical pickup is defective if CX151 is normal.
Out of focus
Does the pickup lens go up and down when removing the disc ?
Yes
Is the waveform inputted at pin 15 on IC146 when loading a disc ? <Refer to the waveform diagrams on page 31.>
Yes
IC146 is defective.
No
No
No
No
No
D-AJ03
IC146 is defective
Is +3.3V applied to C109 of R108 ?
Yes
Check the +3.3V stabilization circuit of IC145 and L103.
The PWB pattern has been cut between TR101 and pin 10 of CX151.
Refer to "The triangular wave for focus servo does not appear".
Check the optical pickup wires. If OK, the optical pickup is defective.
No
R108 is defective.
13
HF is abnormal
Is the output (tracking error signal) found at pin 4 and 5 on IC145 in the CD test mode 3 ?
Normal
Is tracking input found at pin 11 of IC146 ? <Refer to the waveform diagrams on page 31.>
Yes Is the tracking output found at pin 34 in IC149 in the CD test mode 4 ?
Yes
Is there the output between pin 5 and 6 on IC145 ?
Yes
Check the portion between IC145 and CX151 and connection of the optical pickup wires. If OK, the optical pickup is defective.
Abnormal
No
No
No
Check between IC145 and CX151. If OK, the optical pickup is defective.
Check the parts around IC146. If OK, IC146 is defective.
Check the parts around IC149. If OK, IC149 is defective.
Check the parts around IC145. If OK, IC145 is defective.
Track search is impossible
Does the sled motor run by pressing the / button in the test mode ?
Yes
Is the waveform outputted to pin 11 and 17 on IC146 when a track is jumped ? <Refer to the waveform diagrams on page 31.>
Yes
Is the waveform output found at pin 34 and 40 on IC149 when a track is jumped ? <Refer to the waveform diagrams on page 32.>
Yes
Is the slide output found at pin 25 and 26 on IC145, and the tracking output at pin 5 and 6 ?
Yes
Check the portion between IC145 and CX151 and connection of the optical pickup wires. If OK, the optical pickup is defective. Check the portion between IC145 and CX062, sires and periphery of the sled spin motor. If OK, the motor is defective.
No
No
No
No
Refer to "The sled motor does not run".
IC146 is defective.
IC149 is defective.
If the parts around IC145 are normal, IC145 is defective.
13
The triangular wave for focus servo does not appears
D-AJ03
14
Is +3.3V applied to pin 6 of IC149 ?
Yes
Does the triangular wave appear at pin 33 on IC149 ? <Refer to the waveform diagrams on page 32.>
Yes
Does the triangular wave appear at pin 13 on IC145 ? <The same waveform as above>
Yes
Does the saw tooth wave appear between pins 13 and 16 of IC145 ? <Refer to the waveform diagrams on page 32.>
Yes
Does the saw tooth wave appear between pins 13 and 16 of CX151 ? <The same waveform as above>
Yes
The connection of CX151 is poor or the optical pickup is defective.
This disc motor CLV servo is defective
Does the disc motor rotate in the CD test mode 3 ?
Yes
No
No
No
No
No
No
The +3.3V line of IC149 is defective.
Check the parts around pin 33 on IC149. If OK, IC149 is defective.
The connection of signal lines between pin 33 on IC149 and pin 13 on IC145 is poor.
Check the parts around IC145 and the power supply line. If OK, IC145 is defective.
The PWB pattern has been cut.
Is the voltage applied between pins 27 and 28 of IC1 for about 0.3-1.5 seconds when switching from the CD test mode 2 to 3 ?
No
Yes
The disc motor is defective or wires have broken.
0.3-1.5 seconds
Does the disc motor rotate too rapidly or slowly ?
Yes
Does the eye pattern appear at pin 19 on IC146 ? <Refer to the waveform diagrams on page 31> (It is OK even if the waveform is not clear.)
Yes
Is the eye pattern Vp-p 1.2V inputted to the pin 24 on IC149 ?
Yes
IC149 is defective. (After checking the parts around it, replace it.)
No
No
Is the pin 41 on IC149 in the high state for 0.3-1.5 seconds and does it pulse when switching from the CD test mode 2 to 3 ? <Refer to the waveform diagrams on page 31>
Yes
IC149 is defective or wires have broken.
Recheck whether the optical pickup objective is dirty. If it is dirty, clean it. Check the connection between pin 19 on IC146 and pin 24 on IC149. If OK, the optical pickup is defective.
Check the PWB pattern and C155.
No
IC149 is defective.
5V
0.3-1.5 seconds
14
No sound is heard
D-AJ03
15
Is the digital signal outputted from the pin 4 (digital OUT) of IC149 ?
Yes
Is digital signal outputted from the pin 8 (digital OUT) of IC150 ?
Yes
Is the digital signal sent to the pin 26 of CX281 ?
Yes
OK
No
No
No
Check the parts around IC149. If OK, IC149 is defective.
Check the parts around IC150. If OK, IC150 is defective.
Check the CD/MD connection sections.
The slide motor does not run
Is the slide feed signal outputted to pin 40 of IC149 by pressing the
Is the slide feed signal outputted between pins 25 and 26 of IC145 ?
Is the slide feed voltage applied to both edges of the sled motor ?
Check the slide motor. If the sled motor does not run when the DV2.0V is applied to its terminal. It is defective.
/ button in the test mode ?
Yes
Yes
Yes
No
No
No
Check the connection of parts around IC149. If OK, IC149 is defective.
Check the connection between pin 20 of IC145 and pin 40 of IC149. If OK, IC145 is defective.
Check the PWB pattern.
15

WAVEFORMS OF CD CIRCUIT

Tracking error
Stopped
T
1
1
IC146 11pin
TEO
Smoothing : ON BW : 20MHz
CH1=200mV
CH1 V/DIV
CAL
=Filter=
T
DC 10:1
VAR
=Offset=
CH1 : 0.000V Main : 10K
CH3 : 0.00V CH4 : 0.00V
=Record Length=
Zoom : 4KCH2 : 0.00V
2000/09/18 16:56:26
5ms/div
(5ms/div)
NORM:200kS/s
200mV
=Trigger= Mode : AUTO Type : EDGE CH1 Delay : 102.3ns Hold off : MINIMUM
When there is no wound in the disc.
CH1
V/DIV
Disc playback
Foucus servo on
Stopped
CH1=500mV
IC146 15pin
FEO
3
IC145
4pin FO+
DC 10:1
1
T
CH2=2V DC 10:1
T
CH3=2V DC 10:1
4
2
5
3
IC145
3pin FO
-
Smoothing : ON BW : 20MHz
CH2
CH1 CH3 CH4 EXT LINE
=Filter= =Offset= =Record Length= =Trigger=
CH1 : 0.000V Main : 10K
CH3 : 0.00V CH4 : 0.00V
Zoom : 5KCH2 : 0.00V
D-AJ03
2000/09/18 15:29:21
2ms/div
(2ms/div)
NORM:500kS/s
CH2
Level
2.48V
Mode : SINGLE Type : EDGE CH2 Delay : 102.3ns Hold off : MINIMUM
When a door was closed, disc dovetail
16
RF
T
Stopped
CH1=500mV
DC 10:1
6
T
1
IC146 19pin
RFGO
FileName
Format
BMP
=Filter= =Offset= =Record Length= =Trigger= Smoothing : ON BW : 20MHz
Stopped
CH1=1V
DC 10:1
T
1
7
IC149 41pin DMO
2
8
IC146 12pin
RFDC
3
AutoFile OFF ON
CH1 : 0.000V Main : 1K
CH3 : 0.000V CH4 : 0.00V
T
CH2=1V
DC 10:1
Zoom : 400CH2 : 0.00V
CH3=1V
DC 10:1
2
IC146 17pin
RFRP
=Filter=
Smoothing : ON
BW : 20MHz
=Offset=
CH1 : 0.00V Main : 10K
CH3 : 0.00V CH4 : 0.00V
=Record Length=
Zoom : 4KCH2 : 0.00V
1
IC146 11pin
TEO
Tracking
Stopped
T
1
Smoothing : ON BW : 20MHz
CH1 V/DIV
CAL
=Filter=
T
CH1=1V DC 10:1
VAR
=Offset=
CH1 : 0.00V Main : 10K
CH3 : 0.00V CH4 : 0.00V
=Record Length=
Zoom : 4KCH2 : 0.00V
2000/09/18 16:55:04
5ms/div
(5ms/div)
NORM:200kS/s
CH1
V/DIV
=Trigger= Mode : AUTO Type : EDGE CH1 Delay : 102.3ns Hold off : MINIMUM
1V
By the test mode 3
During the tracking jump TEO, RFRP Disc motor and CD related signal
1
IC146
11pin
TEO
2
IC146
17pin
RFRP
Stopped
CH1=1V DC 10:1
T
1
2
CH1
=Filter= Smoothing : ON BW : 20MHz
T
CH2=1V
DC 10:1
CH2 CH3 CH4 EXT LINE
=Offset=
CH1 : 0.00V Main : 10K
CH3 : 0.00V CH4 : 0.00V
=Record Length=
Zoom : 5KCH2 : 0.00V
2000/09/18 17:01:23
2ms/div
(2ms/div)
NORM:500kS/s
CH1
Level
0.54V
=Trigger= Mode : SINGLE Type : EDGE CH1 Delay : 102.3ns Hold off : MINIMUM
Track jump
2000/09/18 14:55:22
500ms/div
(500ms/div)
NORM:200kS/s
To TopMenu
Mode : SINGLE
Type : EDGE CH1 Delay : 102.3ns Hold off : MINIMUM
2000/09/18 16:45:07
500ms/div
(500ms/div)
NORM:2kS/s
=Trigger=
Mode : SINGLE Type : EDGE CH1 Delay : 102.3ns Hold off : MINIMUM
CH3
V/DIV
1V
Disc playback
CD test 2 3 upgrade
16
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