Sony CX-LEM550 Manuale utente
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,
TapeDeckandTunersectionin 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 Vor220 – 240V
AC, 50/60 Hz
Adjustable with voltage
selector
Power consumption 67 W
0.3 W (in Power Saving
Mode)
2
CX-LEM550
Notes on chip component replacement
•Never reuse a disconnected chip component.
•Notice that the minus side of a tantalum capacitor may be
damaged by heat.
Flexible Circuit Board Repairing
•Keep the temperature of the soldering iron around 270 °C
during repairing.
•Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
•Be careful not to apply force on the conductor when soldering
or unsoldering.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0OR DOTTED LINE
WITH MARK 0ON THE SCHEMATIC DIAGRAMS AND IN
THE PARTS LIST ARE CRITICAL TO SAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE
PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR
IN SUPPLEMENTS PUBLISHED BY SONY.
CAUTION
Use of controls or adjustments or performance of procedures
otherthan thosespecifiedhereinmay resultin hazardous radiation
exposure.
UNLEADED SOLDER
Boards requiring use of unleaded solder are printed with the lead-
free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with
the lead free mark due to their particular size)
: LEAD FREE MARK
Unleaded solder has the following characteristics.
•Unleaded solder melts at a temperature about 40 °C higher
than ordinary solder.
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
about 350 °C.
Caution: The printed pattern (copper foil) may peel away if
the heated tip is applied for too long, so be careful!
•Strong viscosity
Unleaded solder is more viscou-s (sticky, less prone to flow)
than ordinary solder so use caution not to let solder bridges
occur such as on IC pins, etc.
•Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.
This appliance is
classified as a CLASS 1
LASER product. This
label is located on the
rear exterior.
Dimensions (w/h/d) Approx. 164 × 230.5 ×266
mm incl. projecting parts
and controls
Mass Approx. 4.1 kg
Design and specifications are subject to change
without notice.
3
CX-LEM550
TABLE OF CONTENTS
1. SERVICING NOTES ................................................ 4
2. GENERAL ................................................................... 6
3. DISASSEMBLY
3-1. Rear Cabinet .................................................................... 8
3-2. Top Panel Assy ................................................................ 9
3-3. Front Panel Assy.............................................................. 9
3-4. Base Unit (BU-K7BD81B) ............................................. 10
3-5. Tape Cassette Mechanism Deck ...................................... 10
3-6. MAIN Board.................................................................... 11
3-7. AMP Board...................................................................... 11
4. TEST MODE ............................................................... 12
5. MECHANICAL ADJUSTMENTS......................... 13
6. ELECTRICAL ADJUSTMENTS
Deck Section.................................................................... 13
CD Section ...................................................................... 14
7. DIAGRAMS
7-1. Block Diagram – CD Servo Section –............................ 16
– MAIN Section – ........................................................... 17
7-2. Printed Wiring Board – CD Board – .............................. 18
7-3. Schematic Diagram – CD Board – ................................. 19
7-4. Printed Wiring Board – MAIN Board – ......................... 20
7-5. Schematic Diagram – MAIN Board – ............................ 21
7-6. Printed Wiring Board – AMP Section – ......................... 22
7-7. Schematic Diagram – AMP Section – ............................ 23
7-8. Printed Wiring Board – CONTROL Board – .................. 24
7-9. Schematic Diagram – CONTROL Board –.................... 25
7-10. Printed Wiring Board – POWER Board – ....................... 26
7-11. Schematic Diagram – POWER Board –.......................... 27
8. EXPLODEDVIEWS
8-1. Overall Section ................................................................ 34
8-2. Front Panel Assy-1 .......................................................... 35
8-3. Front Panel Assy-2 .......................................................... 36
8-4. Top Panel Assy ................................................................ 37
9. ELECTRICAL PARTS LIST .................................. 38
4
CX-LEM550 SECTION 1
SERVICING NOTES
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
The laser diode in the optical pick-up block may suffer electrostatic
break-down because of the potential difference generated by the
charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic break-down and also
use the procedure in the printed matter which is included in the
repair parts.
The flexible board is easily damaged and should be handled with
care.
NOTES ON LASER DIODE EMISSION CHECK
The laser beam on this model is concentrated so as to be focused on
the disc reflective surface by the objective lens in the optical pick-
up block. Therefore, when checking the laser diode emission,
observe from more than 30 cm away from the objective lens.
LASER DIODE AND FOCUS SEARCH OPERATION
CHECK
Carryout the “S curvecheck” in“CD sectionadjustment” andcheck
that the S curve waveforms is output three times.
MODEL IDENTIFICATION
– Back Panel –
Model Name PowerVoltage Indication
AEP and UK models 230 V AC, 50/60 Hz 67W
Korean model 220 V AC, 50/60 Hz 67W
Other models (Singapore, 110 – 120 V or
Chilean and peruvian models) 220 – 240 V AC, 50/60Hz 67W
SERVICE POSITION OF THE CD MECHANISM DECK
CD board
CD Mechanism Deck
Power Voltage Indication
5
CX-LEM550
SERVICE POSITION OF THE TAPE CASSETTE MECHANISM DECK
SERVICE POSITION OF THE AMP BOARD
Tape Cassette Mechanism Deck
(CMAL1Z240A)
AMP board
6
CX-LEM550 SECTION 2
GENERAL This section is extracted
from instruction manual.
Main unit
ALBUM +/– qg (10, 11, 16)
BASS/TREBLE 5(18)
Cassette compartment qa
CD SYNCHRO qd (16)
DIRECTION 8(15, 16, 17)
DISPLAY w; (14, 21)
Display window 2
i-Bass 6(18)
OPEN (CD open/close) 4(10)
PHONES jack qf
PLAY MODE 8(9, 11, 16)
Remote sensor 3
TUNER/BAND qj (12, 13)
TUNING +/– qh (12, 13, 18)
TUNING MODE 8(12, 13)
VOLUME 9(19, 23, 25)
?/1 (power) 1(7, 19, 20, 25)
.m/M> (skip back/
skip forward, rewind/fast
forward) qh (10, 11, 15)
x(stop) 7(10, 16, 17, 25)
zREC PAUSE/START qs (16,
17)
CD/NX (play/pause) qk (10,
11, 23)
TAPE/nN (play) ql (15, 16,
17, 20)
Z PUSH (tape open/close) q;
(15)
List of button locations and reference pages
How to use this page
Use this page to find the location of buttons and other
parts of the system that are mentioned in the text.
Illustration number
r
DISPLAY wa (14, 21)
RR
Name of button/part Reference page
ALPHABETICAL ORDER
A – O P – Z
BUTTON DESCRIPTIONS
1234
5
6
7
8
9
qa
0
qs
qdqf
qg
qh
qj
qk
w;
ql
7
CX-LEM550
Remote control
ALBUM +/– qa (10, 11, 16)
CD qh (9, 11)
CLEAR qd (11)
CLOCK/TIMER SELECT 2
(19, 20, 23)
CLOCK/TIMER SET 3(8, 19,
20)
DISPLAY ql (14, 21)
ENTER 9(8, 11, 12, 19, 20)
EQ qs (18)
FM MODE 4(13, 24)
FUNCTION 6(22, 24)
PLAY MODE qk (9, 11, 24)
REPEAT 4(10)
SLEEP w; (18)
TAPE qg (15)
TUNER/BAND 5(12, 13)
TUNER MEMORY qj (12)
TUNING MODE qk (12, 13)
VOLUME +/– 0(19, 23)
?/1 (power) 1(7, 19, 20, 25)
m/M (rewind/fast forward)
7(10, 15)
./> (go back/go forward)
qf (8, 10, 11, 19, 20)
x(stop) 8(10, 16, 17, 25)
X(pause) 8(10, 15)
N(play) 8(9, 11, 20)
+/– (tuning) qf (12, 13)
ALPHABETICAL ORDER
A – O P – Z
BUTTON DESCRIPTIONS
4
5
6
7
8
9
w; 1
qa
qd
qs
ql
qk
qj
qh
qg
qf
0
3
2
*
Use buttons on the remote for the operation.
1Press ?/1 to turn on the system.
2Press CLOCK/TIMER SET.
3Press ./> repeatedly to set the
hour.
4Press ENTER.
5Press ./> repeatedly to set the
minute.
6Press ENTER.
The clock starts working.
To adjust the clock
1Press CLOCK/TIMER SET.
2Press ./> until “CLOCK” appears,
then press ENTER.
3Do the same procedures as step 3 to 6
above.
Note
The clock is not displayed in Power Saving Mode
(page 21).
Setting the clock
8
CX-LEM550 SECTION 3
DISASSEMBLY
•This set can be disassembled in the order shown below.
Note: Follow the disassembly procedure in the numerical order given.
3-1. REAR CABINET
3-1. REAR CABINET
(Page 8)
3-5. TAPE CASSETTE
MECHANISM DECK
(Page 10)
3-6. MAIN BOARD
(Page 11)
3-3. FRONT PANEL ASSY
(Page 9) 3-4. BASE UNIT
(BU-K7BD81B)
(Page 10)
3-2. TOP PANEL ASSY
(Page 9)
SET
3-7. AMP BOARD
(Page 11)
2
four screws
(BTP3
×
12)
7
connector
(CN310)
6
8
rear cabinet
5
two screws
(BVTP3
×
10)
1
four screws
(BTP3
×
12)
3
two screws
(BVTP3
×
10)
4
five screws
(BVTP3
×
10)
9
CX-LEM550
3-2. TOP PANEL ASSY
1
claw
3
5
connector
(S820)
4
wire (flat type) (27 core)
(CN305)
2
claw
6
top panel assy
1
wire (flat type) (24 core)
(CN302)
qd
flont panel assy
2
wire (flat type) (16 core)
(CN303)
q;
wire (flat type) (11 core)
6
two screws
(BVTP3
×
10)
qa
screw
(BVTP4
×
8)
9
7
8
5
connector
(CN301)
4
connector
(CN501A)
3
connector
(CN501B)
qs
harness
3-3. FRONT PANEL ASSY
10
CX-LEM550
3-4. BASE UNIT (BU-K7BD81B)
3-5. TAPE CASSETTE MECHANISM DECK
1
three screws
(BTP2.6
×
8)
3
wire (flat type) (27core)
(CN201)
2
CD cover
6
two screws
7
two washers
4
two screws
5
two washers
8
base unit
(BU-K7BD81B)
2
four screws
(BVTP3
×
10)
3
two harness
4
plate (shield cassette)
5
tape cassette mechanism deck
(CMAL1Z240A)
1
wire (flat type) (7 core)
Indice