MDX-65
SERVICE MANUAL
US Model
Canadian Model
AEP Model
UK Model
E Model
Dolby noise reduction extension manufactured under license
from Dolby Laboratories Licensing Corporation.
“DOLBY” and the double-D symbol a are trademarks of Dolby
Laboratories Licensing Corporation.
Model Name Using Similar Mechanism MDX-62
Mini Disc Mechanism Type
Optical Pick-up Name
MG-798K-133
KMS-241A/J2N
SPECIFICATIONS
FEATURES
System
Laser Diode Properties
Material: GaAlAs
Mini disc digital audio system
• Sony BUS system compatible with mobile MD
changers.
• Direct-in system for inserting and removing
MDs easily.
• No waiting time to change discs in continuous
play.
• The MD changer compartment has a built in light
for easy use even in the dark.
Wavelength: 780 nm
Emission Duration: Continuous
Laser output Power: Less than
44.6 µW*
* This output is the value measured at a distance of
200 mm from the objective lens surface on the
Optical Pick-up Block.
• 1 bit Digital/Analog converter for high quality
sound reproduction.
Frequency response
10 – 20,000 Hz
Wow and flutter Below measurable limit
Signal-to-noise ratio
95 dB
Outputs
Bus control output (8 PIN)
Analog audio output (RCA PIN)
Current drain 300 mA (MD playback)
600 mA (during loading or ejecting a
disc)
Dimensions
Approx. 176 × 83.5 × 142 mm
3
18
(7 × 3 /8 × 5
/32 in.) (w/h/d) not incl.
projecting parts and controls
Approx. 1.1 kg (2 lb. 7 oz.)
Mass
Power requirement
12 V DC car battery (negative
ground)
Supplied accessories
Mounting hardware (1 set)
Bus cable 5.5 m (1)
RCA pin cord 5.5 m (1)
• U.S. and foreign patents licensed from Dolby
Laboratories Licensing Corporation.
• Design and specifications subject to change without
notice.
MINIDISC CHANGER
MICROFILM
SECTION 1
SERVICE NOTE
1-1.TO PLACE THE SET INTO PLAYBACK MODE
The this set has no key control function and cannot be placed into
the Playback mode alone.
For key control, the this set is controlled through serial
communication with a master unit (car audio player, TV tuner or
source selector compatible with the Sony BUS system.)
To service the this set, the set should be connected as given below:
Master unit
(CDX-C880,
C880R, etc.)
MDX-65
BUS CONTROL OUT BUS CONTROL IN
1-2. HOW TO CHECK THE SERVO BOARD
WAVEFORMS
1. Remove the panel (rear) assy, case (upper) and panel (front) assy.
Then, remove the main board from the mechanism deck. (See
page 8 of “SECTION 3. DISASSEMBLY”.)
2. Remove the chassis (OP) block from the mechanism deck. (See
page 10 of “SECTION 3. DISASSEMBLY”.)
3. Short each bridge points BP1 and BP2 on the main board by
solder bridge.
– main board (conductor side) –
BP1
BP2
4. Connect the power board with the main board by the main
flexible board. Connect the main board with the servo board by
the servo flexible board.
5. Connect to a master unit. With the master unit OFF, press the
preset buttons 4 n 5 n 1 (2 seconds or more each) in this
turn to enter the TEST mode.
6. Open the doors and insert a disc in the chassis (OP) assy. Use
the SOURCE button on the master unit to select to MD to
playback.
7. Check the waveforms at each point on the servo board.
Note: After this check is completed, remove solder between
shorted bridge points BP1 and BP2 and open these points.
– 3 –
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