Aiwa CXLFA-500 Service manual
CX-LFA500
SERVICE MANUAL
Ver. 1.4 2005. 10
CX-LFA500 is the Amplifier, CD player, Tape
Deck and Tuner section in XR-FA500.
CD
Section
TAPE
Section
AEP Model
UK Model
E Model
Australian Model
Model Name Using Similar Mechanism NEW
CD Mechanism Type CDM55A-K6BD44B
Base Unit Name BU-K1BD44B
Optical Pick-up Name KSM-213D
Model Name Using Similar Mechanism NEW
Tape Transport Mechanism Type CMAL1Z222B
SPECIFICATIONS
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
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)
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
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 —
MICRO HI-FI COMPONENT SYSTEM
9-877-166-05
2005J16-1
© 2005.10
Sony Corporation
Personal Audio Division
Published by Sony Engineering Corporation
CX-LFA500
Ver 1.2 2003.11
TABLE OF CONTENTS
GENERAL
Power requirements
European model:
Singaporeand
Australian models:
Korean model:
Taiwan model:
Other models:
Power consumption
European model:
Other models:
Power consumption in standby mode
Dimensions (w/h/d) Approx. 190 × 250 ×
Mass Approx. 3.7 kg
Supplied accessories: FM antenna (1)
Specifications and external appearance are subject to change
without notice.
230 V AC, 50/60 Hz
220 V + 240 V AC, 50/60 Hz
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
with ECO mode on: 0.3 W
with ECO mode off: 10 W
284 mm
AM antenna (1)
Speaker cords (2)
Remote commander (1)
Batteries (2)
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
2
SECTION 1
SERVICING NOTES
CX-LFA500
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.
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.
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.
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 .
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 pickup 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.
3
CX-LFA500
Service Position of the CD Mechanism Deck
Service Position of the Tape Cassette Mechanism Deck
4
PARTS AND CONTROLS
Main unit: front
Refer to the pages indicated in parentheses for details.
1
2
3
4
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
6
7
8
9
SECTION 2
GENERAL
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.
CX-LFA500
This section is extracted
from instruction manual.
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
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.
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)
ment.
AUX VIDEO TV
5
Remote commander
Refer to the pages indicated in parentheses for details.
1
2
3
4
5
6
7
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.
:
8
9
0
!
@
#
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
5
CX-LFA500
ADJUSTMENTS BEFORE OPERATION
POWER
6STANDBY/ON
ECO
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
The unit goes into standby.
DBY/ON again.
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.
ECD,
TUNER/
BAND,
dTAPE,
AUX
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
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
POWER
CLOCK
ECD,
TUNER/
BAND,
dTAPE,
AUX
SHIFT
DIMMER
: Power economizing mode is cancelled.
ENTER
f,g
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.
7
6
• This set can be disassembled in the order shown below.
)
)
SET
TOP CABINET,
REAR PANEL
FRONT PANEL ASSY
SECTION 3
DISASSEMBLY
CX-LFA500
Ver 1.2 2003.11
CD MECHANISM DECK
(CDM55A-K6BD44B)
MAIN BOARD,
POWER BOARD
Note: Follow the disassembly procedure in the numerical order given.
CONTROL BOARD,
SINGLE CASSETTE MECHANISM
LOADING BOARD CD BOARD TRAY (CDM55D)
3-1. Top Cabinet, Rear Panel
5
2
three s
(+KTP 3
crews
×
12)
top cabinet
a
3
six s
crews
(+BVTP 3
6
w
ire (flat type)
15p
OPTICAL PICK-UP
(KSM-213D),
HOLDER (C213)
×
10)
qa
rear panel
a
9
three s
(+BVTP 3
7
(+BVTP 3
two s
crews
×
crews
10)
×
10
4
1
three s
(+KTP 3
crews
×
12)
b
q;
tuner (FM/AM)
b
8
three s
(+BVTP 3
crews
×
10
7
CX-LFA500
)
)
3-2. Front Panel Assy
4
w
ire (flat type) 25p (CN302)
8
front panel assy
5
connector 5p (CN1)
6
connector 6p
3
w
ire (flat type) 12p (CN305)
2
four s
crews
(+BVTP 3
×
10
1
two s
crews
(+KTP 3
×
12)
3-3. CONTROL Board, Single Cassette Mechanism
1
twelve s
5
CONTROL
4
w
ire (flat type) 8p (CN603)
board
7
connector 5p (CN201)
crews (+BVTP 3
2
×
10)
w
ire (flat type) 25p (CN601)
3
w
ire (flat type) 12p (CN602)
6
four s
crews (+BVTP 3
7
single cassette mechanism
(CMAL1Z222B)
×
10
8
3-4. CD Mechanism Dec k (CDM55A-K6BD44B)
)
6
CD door assy
7
CD mechanism deck
(CDM55A-K6BD44B)
4
5
CD holder
3
s
crew (+BVTP 3
2
w
×
10)
ire (flat type) 21p (CN303)
CX-LFA500
3-5. MAIN Board, POWER Board
7
four s
crews
9
POWER board
(+BVTP 3
×
10)
8
power transformer
1
connector 7p (CN801)
4
six s
crews
(+BVTP 3
6
MAIN board
3
(+BVTP 3
1
s
crew (+BVTP 3
×
10)
two s
crews
×
10)
×
10)
5
heat sink assy
2
two s
crews (+BVTP 3
×
10
9
CX-LFA500
p
3-6. LOADING Board
4
motor
(M901)
1
(LD) assy
Remove the belt.
3
Remove soldering from the two points.
5
LOADING board
3-7. CD Board
4
wire (flat type) 21p (CN101)
2
Remove soldering
from the four points.
2
two
screws (+BTP 2.6
×
1
screw(+P 2.6
6)
5
CD board
×
5)
3
wire (flat type) 16
10
3-8. T ray (CDM55D)
s
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
A
claw
C
2
tray
C
. (Be careful of the claws.)
B
claw
CX-LFA500
Ver 1.2 2003.11
3-9. Optical Pick-up (KSM-213D), Holder (C213)
3
5
screw (+PTTP M2.6)
6
stopper (BU)
7
compression spring
(T213)
8
insulator
qd
optical pick-up
(KSM-213D)
qg
holder
(C213)
insulator
2
two compression spring
1
(+PTPWH M2.6)
4
9
screw (+PTTP M2.6)
q;
stopper (BU)
qa
compression spring
(T213)
qs
insulator
qf
floating
(+PTPWH M2.6)
(T213)
two floating
insulator
screws
screw
11
CX-LFA500
MEMO
12
SECTION 4
MECHANICAL ADJUSTMENTS
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
Mode
FWD
FWD
back tension
REV
REV
back tension
FF/REW
FWD tension
REV tension
Torque meter Meter reading
2.94 – 7.84 mN • m
CQ-102C
CQ-102C
CQ-102RC
CQ-102RC
CQ-201B
CQ-403A
CQ-403R
(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)
CX-LFA500
13
CX-LFA500
SECTION 5
ELECTRICAL ADJUSTMENTS
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 RCH.
7. Switches and controls should be set as follows unless otherwise
specified.
Signal Used forTape
P-4-A100
WS-48B
[Record/Playback Head Azimuth Adjustment]
Procedure:
1. Mode : Playback
test tape
P-4-A100
(10kHz, –10dB)
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.
10 kHz, –10 dB
3 kHz, 0 dB
MAIN board
J203
speaker terminal
set
Azimuth Adjustment
Tape Speed Adjustment
level meter
+
–
3. Mode: Playback
test tape
P-4-A100
(10kHz, –10dB)
in phase 45
MAIN board
J203
speaker terminal
L
set
R
Waveform of oscilloscope
°
90
°
good
135
oscilloscope
°
wrong
180
°
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)
L-CH
peak
screw
position
14
R-CH
peak
output
level
within
1 dB
L-CH
peak
R-CH
peak
within 1dB
screw
position
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