Sony Walkman D-E777 Service Manual

D-E777/EJ721/EJ725
SERVICE MANUAL
Ver 1.0 2001.01
System
Compact disc digital audio system
Laser diode properties
Material: GaAIAs
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
+1
20 - 20,000 Hz dB (measured by EIAJ CP-
–2
307)
Output (at 4.5 V input level)
Line output (stereo minijack)
Output level 0.7 V rms at 47 kΩ
Recommended load impedance over 10 kΩ
Headphones (stereo minijack)
Approx. 5 mW + Approx. 5 mW at 16 Ω
(Approx. 1 mW + Approx. 1 mW at 16 Ω)*
*For the customers in France
Optical digital output (optical output connector)
Output level: –21 - –15 dBm
Wavelength: 630 - 690 nm at peak level
Sony Corporation
9-873-052-11
2001A0200-1 Audio Entertainment Group
© 2001.1 General Engineering Dept.
Photo : D-EJ725

SPECIFICATIONS

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 NC-WMAA rechargeable
batteries: 2.4 V DC,
• Sony NH-WM2AA rechargeable batteries:
2.4 V DC,
• Two LR6 (size AA) batteries: 3 V DC
• AC power adaptor (DC IN 4.5 V jack):
US, Canadian, MX model:
120 V, 60 Hz
AEP, FR, EE, G, E13 model:
220 - 230 V, 50/60 Hz
UK model: 230 - 240 V, 50 Hz
AUS model: 240 V, 50 Hz
JEW, E33 model: 100 - 240 V, 50/60 Hz
HK model: 220 V, 50/60 Hz
CH model: 220 V, 50 Hz
• Sony DCC-E345 car battery cord for use on
car battery : 4.5V DC
Canadian Model
Australian Model
Chinese Model
Tourist Model
Model Name Using Similar Mechanism D-EJ621
CD Mechanism Type
Optical Pick-up Type
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.
When using G-PROTECTION function
Tow NC-WMAA
(charged for about 3 hours**)
NH-WM2AA
(charged for about 5 hours**)
Two Sony alkaline batteries
LR6 (SG)
Four Sony alkaline batteries
LR6 (SG)
Two rechargeable batteries
NC-WMAA and two Sony
alkaline batteries LR6 (SG)
Rechargeable batteries
NH-WM2AA and two Sony
alkaline batteries LR6 (SG)
* Measured value by the standard of EIAJ
(Electronic Industries Association of Japan).
** Charging time varies depending on how the
rechargeable battery is used.
PORTABLE CD PLAYER
US Model
D-EJ721/EJ725
AEP Model
UK Model
E Model
D-EJ725
D-E777
CDM-3123EBA
DAX-23E
on off
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