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Ver. 1
SERVICE MANUAL
MODEL D-AJ03
PERSONAL AUDIO SYSTEM




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


X0178V.01 DE/CDM 0307
D-AJ03 2

SAFETY PRECAUTIONS

LEAKAGE CURRENT CHECK



LASER RADIATION




500V


1M


(1)




(2)




(1)

(2)




2
D-AJ03 3


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.
2) Disconnect connectors and wire 3 ~ 7 on the Front Panel. 1
The Rear Cover and Front Panel can be detached
respectively.




1




2

1




4
5P Connector 6 11P Connector

7 1P Earth Lug




5
8P Connector

12P Connector

8
2. Main P.W.B. 8
1) Remove 5 screws 8 . FFC
Connectors
2) Disconnect 2 FFCs, 8 connectors on the Main P.W.B.
3P Connector


Main P.W.B.




FFC




Connectors




3
D-AJ03 4

3. CD Mecha. Chassis
1) Remove 4 each screws 10 and 11 i from the front side to
i i
detach the CD Door Lens and CD Door Bracket.
2) Remove 6 screws 12 and take off the Main Chassis.
i


12
i




Main Chassis




11 i
i
CD Door Bracket


CD Door Lens

i
10 11 i
i

i
10
4. CD Mecha.
1) Remove 4 screws 13 fixing the Bracket.
i
2) Detach the CD Mecha. upward as shown to the arrow i
13
direction.


i
13




Rubber
(Green) Collar
(White)




Rubber
(Green)

Rubber
(Blue)




4
D-AJ03 5


Speaker
5. Speaker Box (L & R) Box (L)
1) Remove 4 screws 14 .
i
2) Disconnect 2 connectors.




Speaker
Box (R)



i
14




i
14

6. Tuner P.W.B.
1) Remove 2 screws i
15 .




Tuner P.W.B.




i
15


7. Power P.W.B.
1) Remove 6 screws 16 .
i
2) Disconnect 1 connector.


Power P.W.B.




i
16




i
16 Connector




5
D-AJ03 6


ADJUSTMENT
TUNER SECTION
Connections and adjustment point
Modulation frequency: 400Hz
AM SG Modulation factor: 30%


Modulation frequency: 1kHz
Test loop antenna L+R: 90% (67.5kHz Dev.)
Pilot: 10% (7.5kHz Dev.)
75kHz Dev.: 100%
60cm

FM stereo modulator

75 ohms
Loop antenna Coaxial Cable
FM SG




Rear Panel Side

Antenna Terminal AM G FM



To TP




Digital Voltmeter TUNER PWB TC401
R425

To Output Terminal T403 T402

R419
T401

Distortion Meter
T404
To Output Terminal




Separation Meter or
Electronic Voltmeter


FM ALIGNMENT (BAND BUTTON: FM, AUTO)
Input Output
Alignment Tune-in Point
Step Measuring Measuring Align Part Set Value Remarks
Item (Channel Setting) Frequency Level Modulation Connect to Connect to
Equipment Equipment
FM DC 1 kHz FM Ant Digital Both Leads Align with Mono
1 98 MHz FM SG 98 MHz 60 dB T404 20mV
Balance 75 kHz dev Terminal Voltmeter of R425 Modulation Signal



AM ALIGNMENT (BAND BUTTON: AM)
Input Output
Alignment Tune-in Point
Step Measuring Measuring Align Part Set Value Remarks
Item (channel Setting) Frequency Level Modulation Connect to Connect to
Equipment Equipment
E3:520 kHz T403 E3: 1.0