CXLFA-500
CX-LFA500
AEP Model
UK Model
E Model
Australian Model
SERVICE MANUAL
MICRO HI-FI COMPONENT SYSTEM
Sony Corporation
Personal Audio Division
Published by Sony Engineering Corporation
9-877-166-05
2005J16-1
© 2005.10
CX-LFA500 is the Amplifier, CD player, Tape
Deck and Tuner section in XR-FA500.
SPECIFICATIONS
Ver. 1.4 2005. 10
Model Name Using Similar Mechanism NEW
CD
CD Mechanism Type CDM55A-K6BD44B
Section
Base Unit Name BU-K1BD44B
Optical Pick-up Name KSM-213D
TAPE
Model Name Using Similar Mechanism NEW
Section
Tape Transport Mechanism Type CMAL1Z222B
TUNER
FM tuning range 87.5 MHz to 108 MHz
(50 kHz step)
FM usable sensitivity (IHF) 16.8 dBf
FM antenna terminal 75 (unbalanced)
AM tuning range
AM usable sensitivity 350 μV/m
AM antenna Loop antenna
AMPLIFIER
Power output Rated: 16 W + 16 W(6 ohms, T.H.D.
1 %, 1 kHz/DIN 45500)
Reference: 20 W + 20 W(6 ohms,
T.H.D. 10 %, 1 kHz/DIN 45324)
MUSIC POWER
40 W + 40 W
Input AUX IN: 500 mV
Outputs SPEAKERS: 6 ohms or more
PHONES: 32 ohms or more
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)
CASSETTE DECK
Track format 4 tracks, 2 channels stereo
Frequency response 50 Hz – 10000 Hz
Recording system AC bias
Heads Recording/playback × 1, erase × 1
CD PLAYER
Laser Semiconductor laser ( = 780 nm)
Emission duration: continuous
D/A converter 1 bit dual
Signal-to-noise ratio 80 dB (1 kHz, 0 dB)
Wow and flutter Unmeasurable
— Continued on next page —
2
CX-LFA500
1. SERVICING NOTES ······················································· 3
2. GENERAL ·········································································· 5
3. DISASSEMBLY
3-1. Top Cabinet, Rear Panel·················································· 7
3-2. Front Panel Assy ····························································· 8
3-3. CONTROL Board, Single Cassette Mechanism············· 8
3-4. CD Mechanism Deck (CDM55A-K6BD44B)················ 9
3-5. MAIN Board, POWER Board ········································9
3-6. LOADING Board·························································· 10
3-7. CD Board ······································································ 10
3-8. Tray (CDM55D) ··························································· 11
3-9. Optical Pick-up (KSM-213D), Holder (C213) ············· 11
4. MECHANICAL ADJUSTMENTS ····························· 13
5. ELECTRICAL ADJUSTMENTS ······························· 14
6. DIAGRAMS······································································ 17
6-1. Block Diagram – CD Section – ··································· 18
6-2. Block Diagram – Main Section – ································ 19
6-3. Printed Wiring Board – CD Section – ························· 20
6-4. Schematic Diagram – CD Section – ···························· 21
6-5. Printed Wiring Boards – Main Section – ····················· 22
6-6. Schematic Diagram – Main Section – ························· 23
6-7. Printed Wiring Board – Control Section – ··················· 24
6-8. Schematic Diagram – Control Section –······················ 25
6-9. Printed Wiring Board – Power Section – ····················· 26
6-10. Schematic Diagram – Power Section –······················ 26
6-11. IC Pin Function Description ······································· 30
7. EXPLODED VIEWS
7-1. Overall Section ····························································· 32
7-2. Front Section································································· 33
7-3. Chassis Section ····························································· 34
7-4. CD Mechanism Deck Section······································· 35
7-5. Optical Pick-up Section (KSM-213D)·························· 36
8. ELECTRICAL PARTS LIST······································· 37
TABLE OF CONTENTS
Ver 1.2 2003.11
GENERAL
Power requirements
European model:
Singaporeand
Australian models:
Korean model:
Taiwan model:
Other models:
Power consumption
European model:
Other models:
230 V AC, 50/60 Hz
Power consumption in standby mode
with ECO mode on: 0.3 W
with ECO mode off: 10 W
Dimensions (w/h/d) Approx. 190 × 250 ×
284 mm
Mass Approx. 3.7 kg
Supplied accessories: FM antenna (1)
AM antenna (1)
Speaker cords (2)
Remote commander (1)
Batteries (2)
Specifications and external appearance are subject to change
without notice.
220-240 V AC, 50/60 Hz
220 V AC, 60 Hz
110-120 V AC, 50/60 Hz
110-120 V/220-240 V AC, 50/60 Hz
52W
60W
220 V + 240 V AC, 50/60 Hz
3
CX-LFA500
SECTION 1
SERVICING NOTES
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH
MARK 0 ON 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
other than those specified herein may result in hazardous
radiation exposure.
This appliance is classified as a CLASS 1 LASER product.
The CLASS 1 LASER PRODUCT MARKING is located on
the exterior.
Laser component in this product is capable of emitting radiation
exceeding the limit for Class 1.
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
Carry out the “S curve check” in “CD section adjustment” and check
that the S curve waveforms is output three times.
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
aged 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.
4
CX-LFA500
Service Position of the CD Mechanism Deck
Service Position of the Tape Cassette Mechanism Deck
5
CX-LFA500
SECTION 2
GENERAL
This section is extracted
from instruction manual.
5
PARTS AND CONTROLS
Main unit: front
Refer to the pages indicated in parentheses for details.
1
4
2
3
6
7
8
9
5
1 POWER 6STANDBY/ON (7)
Switches the unit on and off (standby).
ECO (7)
Sets the ECO mode on or off.
RDS (10-12)
Activates RDS features.
2 PHONES jack
Plug in optional headphones set with a stereo mini plug
(ø3.5 mm). Speaker output is cancelled.
3 SYNCHRO REC (15)
Starts recording and CD play simultaneously.
wREC START/REC PAUSE (15)
Starts and pauses recording.
4 BASS (13)
Adjusts the bass level.
TREBLE (13)
Adjusts the treble level.
5 ECD (7-9)
Starts and pauses CD play.
TUNER/BAND (7, 10)
Selects tuner function and the tuner band.
dTAPE (REC MUTING) (7, 14, 15)
Starts playback and changes the playback side.
Also used to enter 4-second blank spaces during
recording.
AUX (7)
Selects the function of external equipment connected to
AUX IN jacks.
6 zOPEN/CLOSE (8)
Opens or closes the disc compartment.
7 sSTOP (8, 9, 14, 15)
CD and Tape: stops playback.
f/r-, +t/g (8, 10, 12-14, 16,
17)
CD: skips to a previous or a succeeding track when
pressed, searches a track in fast forward or reverse
playback when held down.
Tape: rewinds or fast forwards the tape.
Tuner: manually tunes up or down within the band.
8 zPUSH EJECT (14, 15)
Opens or closes the cassette holder.
9 VOLUME (13, 16)
Adjusts the volume.
Main unit: rear
Refer to the pages indicated in parentheses for details.
1
2
3
4
5
1 AM LOOP terminal and FM 75 Ω terminal
(4)
Plug in the supplied AM and FM antennas.
2 AUX IN jacks
Accept analogue sound signals from external equipment.
Connect external equipment using an optional connecting
cable with RCA phono plugs (red plug to R jack, white
plug to L jack). Refer also to the operating instructions
for your equip
ment.
To switch function to external input, press AUX.
To change a source name in the display of the
AUX function.
Hold down AUX and press POWER while the power is
on.
AUX VIDEO TV
3 SUB WOOFER3 jack
Connect optional powered sub woofer with a built-in
amplifier to the jack.
4 SPEAKERS3 terminals (4)
Connect the speaker cords of the supplied speakers.
5 AC power cord (4)
6
Remote commander
Refer to the pages indicated in parentheses for details.
1
4
5
6
7
9
8
!
@
#
0
2
3
Buttons with the same or similar names on the main unit
basically have the same function.
1 POWER (7)
2 1–10/0, >10 (8, 10)
CD: selects a track of the specified number.
Tuner: tunes in the station with the specified preset
number.
The numbered buttons take on these functions when pressed with
SHIFT held down
:
CLOCK (7)
Selects clock mode.
TIMER (16)
Selects timer mode.
TUNER MODE (13)
Switches between stereo or monaural FM reception.
REV MODE (14, 15)
Selects a reverse mode.
3 SHUFFLE/PROGRAM (8, 9)
Selects shuffle or programmed CD playback mode.
REPEAT (8)
Selects repeat CD playback mode.
4 PRESETN,M (10)
f/r,t/g (8, 10, 12-14, 16, 17)
ENTER (7, 10, 16, 17)
Determines the mode.
Stores the received station to preset.
5 ECD (7-9)
TUNER/BAND (7, 10)
dTAPE (7, 12)
AUX (7)
6 DISPLAY (8)
Changes the display in CD playback mode.
DIMMER (7)
Adjusts the display window brightness.
SLEEP (16)
Selects sleep-timer mode.
7 SHIFT
Hold down when pressing a numbered button to change
its function to that printed above the number.
8 MUTING (13)
To turn off the sound temporarily.
9 CLEAR (9, 10, 17)
CD: Clears a CD program
Tuner: Clears a preset station.
0 TREBLE (13)
BASS (13)
! s (8, 9, 14, 15)
@ FUNCTION (15)
Switches the active function among TAPE, TUNER, AUX
(VIDEO or TV) and CD.
# VOLUME +,- (13)
6
CX-LFA500
7
ADJUSTMENTS BEFORE OPERATION
ECO
CLOCK
POWER
DIMMER
SHIFT
ECD,
TUNER/
BAND,
dTAPE,
AUX
f,g
POWER
6STANDBY/ON
ECD,
TUNER/
BAND,
dTAPE,
AUX
ENTER
f,g
ECO mode
Reduces power consumption in standby mode with the following
operations.
Press ECO.
Each press of the button changes the mode as follows;
ECO ON: Power economizing mode is activated.
When the unit turns off, everything in the display disappears
and only the red indicator above POWER lights to show that
the power is being supplied.
ECO OFF
: Power economizing mode is cancelled.
When the unit turns off, the clock display appears.
Initial mode is ECO OFF.
Standby power consumption
ECO ON: 0.3 W
ECO OFF: 10 W
Setting the clock
1
In stop mode, hold down SHIFT and press CLOCK
on the remote.
Go to step 3 when the hour of the clock display flashes.
2
Within 6 seconds, press ENTER.
The hour flashes in the display.
3
Press f or g to set the hour, then press
ENTER.
4
Press f or g to set the minute.
Each press changes the time in 1-minute steps.
5
Press ENTER.
The time display stops flashing and the clock starts from
00 seconds.
To display the time while the power is on
Hold down SHIFT and press CLOCK on the remote.
The time will be displayed for 6 seconds.
Tip:
''AM 12:00" indicates midnight and "PM12:00" noon.
If "- -:- -" appears when the unit is turned off
There has been a power interruption. Reset the clock.
Power
Turning the unit on
Press POWER 6STANDBY/ON (POWER on the remote ).
Alternatively, press d TA PE, TUNER/BAND, AUX or
ECD. Playback will start automatically if a disc or tape is
loaded.
Turning the unit off
Press POWER 6STAN
DBY/ON again.
The unit goes into standby.
Dimmer
The display window brightness can be selected.
Press DIMMER on the remote repeatedly.
Each press of the button changes the following three levels:
"DIMMER 1", "DIMMER 2" and "DIMMER 0".
"DIMMER 0" is brightest.
7
CX-LFA500
SECTION 3
DISASSEMBLY
Note: Follow the disassembly procedure in the numerical order given.
• This set can be disassembled in the order shown below.
SET
MAIN BOARD,
POWER BOARD
LOADING BOARD CD BOARD TRAY (CDM55D)
OPTICAL PICK-UP
(KSM-213D),
HOLDER (C213)
CD MECHANISM DECK
(CDM55A-K6BD44B)
CONTROL BOARD,
SINGLE CASSETTE MECHANISM
FRONT PANEL ASSY
TOP CABINET,
REAR PANEL
3-1. Top Cabinet, Rear Panel
1
three s
crews
(+KTP 3
×
12)
2
three s
crews
(+KTP 3
×
12)
3
six s
crews
(+BVTP 3
×
10)
7
two s
crews
(+BVTP 3
×
10
)
8
three s
crews
(+BVTP 3
×
10
)
5
top cabinet
4
qa
rear panel
q;
tuner (FM/AM)
6
w
ire (flat type)
15p
a
a
b
b
9
three s
crews
(+BVTP 3
×
10)
Ver 1.2 2003.11
8
CX-LFA500
3-2. Front Panel Assy
1
two s
crews
(+KTP 3
×
12)
2
four s
crews
(+BVTP 3
×
10
)
3
w
ire (flat type) 12p (CN305)
4
w
ire (flat type) 25p (CN302)
8
front panel assy
5
connector 5p (CN1)
6
connector 6p
7
connector 5p (CN201)
3-3. CONTROL Board, Single Cassette Mechanism
7
single cassette mechanism
(CMAL1Z222B)
5
CONTROL
board
1
twelve s
crews (+BVTP 3
×
10)
6
four s
crews (+BVTP 3
×
10
)
2
w
ire (flat type) 25p (CN601)
3
w
ire (flat type) 12p (CN602)
4
w
ire (flat type) 8p (CN603)
9
CX-LFA500
3-4. CD Mechanism Dec k (CDM55A-K6BD44B)
1
s
crew (+BVTP 3
×
10)
5
CD holder
4
3
s
crew (+BVTP 3
×
10)
6
CD door assy
7
CD mechanism deck
(CDM55A-K6BD44B)
2
w
ire (flat type) 21p (CN303)
3-5. MAIN Board, POWER Board
2
two s
crews (+BVTP 3
×
10
)
3
two s
crews
(+BVTP 3
×
10)
7
four s
crews
(+BVTP 3
×
10)
4
six s
crews
(+BVTP 3
×
10)
5
heat sink assy
6
MAIN board
9
POWER board
1
connector 7p (CN801)
8
power transformer
10
CX-LFA500
3-6. LOADING Board
5
LOADING board
2
two
screws (+BTP 2.6
×
6)
4
motor
(LD) assy
(M901)
1
Remove the belt.
3
Remove soldering from the two points.
3-7. CD Board
2
Remove soldering
from the four points.
3
wire (flat type) 16
p
5
CD board
4
wire (flat type) 21p (CN101)
1
screw(+P 2.6
×
5)
11
CX-LFA500
3-8. T ray (CDM55D)
2
tray
1
While pressing the two protrusions
A
and
B
to unlock the two claws as shown,
pull the tray in the direction of the arrow
C
. (Be careful of the claws.)
claw
claw
C
A
B
3-9. Optical Pick-up (KSM-213D), Holder (C213)
1
two floating
screw
s
(+PTPWH M2.6)
qf
floating
screws
(+PTPWH M2.6)
qg
holder
(C213)
5
screw (+PTTP M2.6)
6
stopper (BU)
2
two compression spring
(T213)
7
compression spring
(T213)
3
insulator
8
insulator
9
screw (+PTTP M2.6)
q;
stopper (BU)
qa
compression spring
(T213)
qs
insulator
qd
optical pick-up
(KSM-213D)
4
insulator
Ver 1.2 2003.11
12
CX-LFA500
MEMO
13
CX-LFA500
2.94 – 7.84 mN • m
(30 to 79 g • cm)
(0.42 – 1.11 oz • inch)
0.15 – 0.59 mN • m
(2 to 6 g • cm)
(0.03 – 0.08 oz • inch)
0.15 – 0.59 mN • m
(2 to 6 g • cm)
(0.03 – 0.08 oz • inch)
0.15 – 0.59 mN • m
(2 to 6 g • cm)
(0.03 – 0.08 oz • inch)
6.86 – 17.64 mN • m
(70 to 179 g • cm)
(0.98 – 2.49 oz • inch)
9.8 mN • m or more
(100 g • cm or more)
(1.4 oz • inch or more)
9.8 mN • m or more
(100 g • cm or more)
(1.4 oz • inch or more)
CQ-102C
CQ-102C
CQ-102RC
CQ-102RC
CQ-201B
CQ-403A
CQ-403R
Precaution
1. Clean the following parts with a denatured alcohol-moistened
swab:
record/playback heads pinch rollers
erase head rubber belts
capstan idlers
2. Demagnetize the record/playback head with a head demag-
netizer.
3. Do not use a magnetized screwdriver for the adjustments.
4. After the adjustments, apply suitable locking compound to the
parts adjusted.
5. The adjustments should be performed with the rated power
supply voltage unless otherwise noted.
Torque Measurement
SECTION 4
MECHANICAL ADJUSTMENTS
Mode
FWD
FWD
back tension
REV
REV
back tension
FF/REW
FWD tension
REV tension
Torque meter Meter reading
14
CX-LFA500
SECTION 5
ELECTRICAL ADJUSTMENTS
[Record/Playback Head Azimuth Adjustment]
Procedure:
1. Mode : Playback
2. Turn the adjustment screw and check output peaks. If the peaks
do not match for L-CH and R-CH, turn the adjustment screw
so that outputs match within 1 dB of peak.
test tape
P-4-A100
(10kHz, –10dB)
MAIN board
J203
speaker terminal
level meter
set
+
–
L-CH
peak
R-CH
peak
screw
position
output
level
within
1 dB
L-CH
peak
R-CH
peak
screw
position
within 1dB
Signal Used forTape
P-4-A100
WS-48B
10 kHz, –10 dB
3 kHz, 0 dB
Azimuth Adjustment
Tape Speed Adjustment
DECK SECTION 0 dB=0.775V
1. Demagnetize the record/playback head with a head demagnetizer.
2. Do not use a magnetized screwdriver for the adjustments.
3. After the adjustments, apply suitable locking compound to the
parts adjusted.
4. The adjustments should be performed with the rated power
supply voltage unless otherwise noted.
5. The adjustments should be performed in the order given in this
service manual. (As a general rule, playback circuit adjustment
should be completed before performing recording circuit
adjustment.)
6. The adjustments should be performed for both L-CH and R-
CH.
7. Switches and controls should be set as follows unless otherwise
specified.
4. After the adjustments, apply suitable locking compound to the
parts adjusted.
Adjustment Location: Record/Playback/Erase Head
[Tape Speed Check]
Procedure:
1. Turn the power on.
2. Insert the WS-48B into deck.
3. Press the Y button of deck.
4. Check the reading of frequency counter becomes 3000 ± 90 Hz.
Sample Value of Wow and flutter
W.RMS (JIS) less than 0.3%
(test tape: WS-48B)
3. Mode: Playback
test tape
P-4-A100
(10kHz, –10dB)
oscilloscope
set
Waveform of oscilloscope
in phase 45
°
90
°
135
°
180
°
good
wrong
MAIN board
J203
speaker terminal
L
R
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