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Sony D-EJ750 User Manual

Sony D-EJ750
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D-EJ750/EJ751/EJ753/EJ755/EJ756CK/EJ758CK
SERVICE MANUAL
SPECIFICATIONS
Photo : D-EJ755
Model Name Using Similar Mechanism D-E350
CD Mechanism Type CDM-3125ER
Optical Pick-up Type DAX-25E
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 JEITA CP-307)
Output (at 4.5 V input level)
Line output (stereo minijack)
Output level 0.7 V rms at 47 k
Recommended load impedance over 10 k
Headphones (stereo minijack)
Approx.5 mW + Approx. 5 mW at 16
(Approx. 0.5 mW + Approx. 0.5 mW at 16 )*
*For the customers in France
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, CND, C&SA, MX model: 120 V, 60 Hz
AEP, FR, G, EE, E13 mode : 220 - 230 V, 50/60 Hz
UK model: 230 - 240 V, 50 Hz
AUS model: 240 V, 50 Hz
CH model: 220 V, 50 Hz
Ver 1.0 2002.02
US Model
D-EJ756CK/EJ758CK
Canadian Model
UK Model
D-EJ751/EJ755/EJ758CK
AEP Model
D-EJ750/EJ751/EJ753/EJ755/EJ758CK
Australian Model
E Model
D-EJ751/EJ758CK
Chinese Model
D-EJ751
9-873-580-01
2002B0200-1
© 2002.02
Sony Corporation
Personal Audio Company
Pubulished by Sony Engineering Corporation
Battery life* (approx. hours)
(When you use the CD player on a flat and stable sur-
face.)
Playing time varies depending on how the CD player is
used.
When using G-PROTECTION function
on off
Two NC-WMAA 12 10
(charged for
about 3 hours**)
NH-WM2AA 25 22
(charged for
about 5 hours**)
Two Sony alkaline 48 38
batteries LR6(SG)
(produced in Japan)
* Measured value by the standard of JEITA (Japan
Electronics and Information Technology
Industries Association).
** 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. 135.5 × 29.2 × 137.4 mm
(5
3
8
× 1
3
16
× 5
1
2
in.)
Mass (excluding accessories)
Approx. 185 g (6.6 oz.)
Design and specifications are subject to change
without notice.
Accessories
Supplied accessories
For the area code of the location in which you
purchased the CD player, check the upper left
side of the bar code on the package.
* 1 Supplied with MX models
* 2 Not supplied with MX models
D-EJ756CK/EJ758CK
AC power adaptor (1)
Headphones/earphones (1)
Rotary commander (1)
Car battery cord (1)
Car connecting pack (1)
Velcro tape for the CD player (4)
Velcro tape for the rotary commander (2)
Hand strap (1)
AC power adaptor (1)
aaa
Headphones/earphones
a
*
1
a
with remote control (1)
Headphones/
aa
*
2
a
earphones (1)
Rechargeable
––
aa
batteries (2)
Battery carrying case (1)
––
aa
D-EJ755
D-EJ753
D-EJ751
D-EJ750
PORTABLE CD PLAYER
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
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Sony D-EJ750 Specifications

General IconGeneral
BrandSony
ModelD-EJ750
CategoryCD Player
LanguageEnglish

Summary

Specifications

General Specifications Data

Key specifications including battery life, dimensions, mass, and power requirements.

General Safety and Handling Precautions

Laser Safety Warnings

Critical warnings regarding laser radiation exposure.

Servicing Notes

Optical Pick-up and Laser Diode Handling

Precautions for handling the optical pick-up and checking laser diode emission.

Disassembly Procedures

Electrical Adjustments and Calibration

Pre-Adjustment Checks and Precautions

Essential checks and safety measures before performing electrical adjustments.

Focus Bias and RF Signal Waveform Tests

Procedures for adjusting focus bias and testing RF signal eye patterns.

Waveform Analysis and IC Block Diagrams

Waveform Analysis

Visual examples of waveforms for troubleshooting and calibration.

Exploded Views and Parts Identification

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