Sony CX-LEM550 - User Manual

SERVICE MANUAL
Sony Corporation
Home Audio Company
Published by Sony Engineering Corporation
AEP Model
UK Model
E Model
COMPACT DISC DECK RECEIVER
9-877-819-01
2004F1678-1
© 2004.06
Ver 1.0 2004.06
SPECIFICATIONS
CX-LEM550
Model Name Using Similar Mechanism HCD-NE5
CD
Base Unit Name BU-K7BD81B
Section
Optical Pick-up Name KSM-213EDP/C2NP
Tape deck Model Name Using Similar Mechanism HCD-GP5
Section Tape Transport Mechanism Type CMAL1Z240A
CX-LEM550 is the Amplifier, CD player,
Tape Deck and Tuner section in XR-EM550.
— Continued on next page —
Main unit
Amplifier section
European model:
DIN power output (rated): 20 + 20 W
(6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference):
25 + 25 W
(6 ohms at 1 kHz, 10%
THD)
Music power output (reference):
38 + 38 W
Other models:
The following measured at AC 230 V or AC 120 V, 50/
60 Hz
DIN power output (rated): 20 + 20 W
(6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference):
25 + 25 W
(6 ohms at 1 kHz, 10%
THD)
Inputs
MD (phono jacks): Sensitivity 450 mV,
impedance 47 kilohms
Outputs
PHONES: Accepts headphones with
an impedance of 8 ohms or
more
SPEAKER: Accepts impedance of 6 to
16 ohms.
CD player section
Laser Semiconductor laser
(λ=780 nm)
Emission duration:
continuous
Frequency response 20 Hz – 20 kHz
Tape deck section
Recording system 4-track 2-channel, stereo
Frequency response 50 – 13,000 Hz (±3 dB),
using Sony TYPE I
cassettes
Tuner section
FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range 87.5 – 108.0 MHz
Antenna FM lead antenna
Antenna terminals 75 ohms unbalanced
Intermediate frequency 10.7 MHz
AM tuner section
European model: 531 – 1,602 kHz
(with the tuning interval
set at 9 kHz)
Other models: 530 – 1,710 kHz
(with the tuning interval
set at 10 kHz)
531 – 1,602 kHz
(with the tuning interval
set at 9 kHz)
Antenna AM loop antenna, external
antenna terminal
Intermediate frequency 450 kHz
General
Power requirements
European model: 230 V AC, 50/60 Hz
Korean model: 220 V AC, 60 Hz
Taiwanese model: 120 V AC, 50/60 Hz
Other models: 110 – 120 V or 220 – 240 V
AC, 50/60 Hz
Adjustable with voltage
selector
Power consumption
67 W
0.3 W (in Power Saving
Mode)

Summary

Specifications

CD Player Specifications

CD player section specifications.

Tape Deck Specifications

Tape deck section specifications.

Tuner Section Specifications

Tuner section specifications.

General System Specifications

General specifications for the unit.

Servicing Notes

Optical Pick-up Handling Precautions

Precautions for handling the optical pick-up block.

Laser Diode Emission and Focus Checks

Procedures for checking laser diode emission and focus.

Component Service Positions

Locations of key components for service.

General Information

Main Unit Button Locations

Reference pages for main unit controls and buttons.

Disassembly Procedures

Rear Cabinet Disassembly

Procedure to remove the rear cabinet.

Top Panel Assembly Disassembly

Procedure to remove the top panel assembly.

Front Panel Assembly Disassembly

Procedure to remove the front panel assembly.

Base Unit and Tape Deck Disassembly

Procedures for disassembling the base unit and tape deck.

Main and AMP Board Disassembly

Procedures for removing the main and AMP boards.

Test Modes

Cold Reset Function

Procedure for performing a cold reset.

Panel Test Mode

Procedure for testing all display segments.

Tuner Step Selection

Method to change AM tuning step intervals.

Mechanical Adjustments

Tape Mechanism Deck Adjustments

Adjustments for the tape mechanism deck.

Electrical Adjustments

Deck Section Adjustment

Electrical adjustments for the deck section.

Record;Playback Head Azimuth Adjustment

Procedure for adjusting record/playback head azimuth.

Electrical Test Procedures

Focus Bias Check

Procedure for checking focus bias.

Tape Speed Check

Procedure for checking tape speed.

Diagrams

Circuit Boards Location

Diagram showing the location of circuit boards.

CD Servo Block Diagram

Main Section Schematic

CD Board Diagrams

Main Board Diagrams

AMP Section Diagrams

Control Board Diagrams

Power Board Diagrams

Waveforms and IC Block Diagrams

IC Pin Function Descriptions

Exploded Views

Overall Section Exploded View

Exploded view of the overall unit.

Front Panel Assembly 1 Exploded View

Exploded view of front panel assembly part 1.

Front Panel Assembly 2 Exploded View

Exploded view of front panel assembly part 2.

Top Panel Assembly Exploded View

Exploded view of the top panel assembly.

Electrical Parts List

Sony CX-LEM550 Specifications