Sony DE-990, DEJ-915 Service manual
System
Compact disc digital audio system
Laser diode properties
Material: GaAlAs
Wavelength: λ = 780 nm
Emission duration: Continuous
Laser output: 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 with 7 mm aperture.)
D-A conversion
1-bit quartz time-axis control
Frequency response
20 - 20,000 Hz
+1–2
dB (measured by EIAJ CP-
307)
Output (at 4.5 V input level)
Line output (stereo minijack)
Output level 0.7 V rms at 47 kilohms
Recommended load impedance over 10
kilohms
Headphones (stereo minijack)
Approx. 5 mW + Approx. 5 mW at 16 ohms
(Approx. 3 mW + Approx. 3 mW at 16 ohms)*
*For the customers in France
Optical digital output (optical output connector)
Output level: –21 - –15 dBm
Wavelength: 630 - 690 nm at peak level
Power requirements
For the area code of the model you
purchased, check the upper left side of the
bar code on the package.
• Two Sony NH-14WM rechargeable batteries:
2.4 V DC
• Two LR6 (size AA) batteries: 3 V DC
• AC power adaptor (DC IN 4.5 V jack):
model:US/Canadian 120 V, 60 Hz
AEP/E13 model: 220 - 230 V, 50/60 Hz
UK model: 230 - 240 V, 50 Hz
Tourist/E33 model: 100 - 240 V, 50/60 Hz
Hong Kong model: 220 V, 50/60 Hz
Chinese model: 220 V, 50 Hz
• Sony DCC-E245 car battery cord for use on
car battery: 4.5 V DC
Battery life* (approx. hours)
(When you use the CD player on a flat and stable
surface.)
Playing time varies depending on how the CD
player is used.
Two NH-14WM 25
(charged for
about 4 hours**)
Battery case (two 40
alkaline batteries)
Rechargeable batteries 62
NH-14WM and battery
case (two alkaline
batteries)
* Measured value by the standard of EIAJ
(Electronic Industries Association of Japan).
** Charging time varies depending on how the
rechargeable battery is used.
Operating temperature
5°C - 35°C (41°F - 95°F)
Dimensions (w/h/d) (excluding
projecting parts and controls)
Approx. 127.2 × 19 × 130.1 mm
(5 1⁄8 × 3⁄4 × 5
1
⁄8 in.)
Mass (excluding rechargeable
batteries)
Approx. 167.5 g (6.0 oz)
Supplied accessories
AC power adaptor (1)
Headphones/earphones with remote control (1)
Rechargeable batteries (2)
Battery carrying case (2)
Carrying case (1)
Battery case (1)
AC plug adaptor (1)*
* Supplied with Tourist and E33 models
Design and specifications are subject to change
without notice.
• Abbreviation
E13: 220 - 230 V AC area in E model
E33: 100 - 240 V AC area in E model
D-E990/EJ915
SERVICE MANUAL
Ver 1.0 1999. 10
Photo: D-E990
SPECIFICATIONS
Canadian Model
AEP Model
Chinese Model
Tourist Model
Model Name Using Similar Mechanism NEW
CD Mechanism Type
Optical Pick-Up Name
US : CDM-3022EBG
Other: CDM-3022EBA
US : DAX-22EG
Other: DAX-22E
US Model
UK Model
E Model
D-EJ915
D-E990
MICROFILM
PORTABLE CD PLAYER
5-5. SCHEMATIC DIAGRAM • See page 15 for Waveforms. • See page 23 for IC Block Diagrams.
D-E990/EJ915
(EXCEPT US)
(US)
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ω and 1/
specified.
• % : indicates tolerance.
• C : panel designation.
Note:
The components identified by mark 0 or dotted
line with mark 0 are critical for safety.
Replace only with part
number specified.
• U : B+ Line.
• Po wer voltage is dc 4.5 V and fed with regulated dc po wer
supply from DC IN jack (J401).
• V oltages and wa vef orms are dc with respect to ground in
playback mode.
no mark : CD PLAY
• V oltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal production tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal production tolerances.
• Circled numbers refer to waveforms.
• Signal path.
J : CD PLAY (ANALOG OUT)
c : CD PLAY (OPTICAL OUT)
• Abbreviation
FR : French model
4
W or less unless otherwise
Note:
Les composants identifiés par
une marque 0 sont critiques
pour la sécurité.
Ne les remplacer que par une
pièce portant le numéro
spécifié.
– 19 –
– 20 –
– 21 –
– 22 –
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