Sony CX-LEM300 / XR-EM300 Service Manual ▷ View online
2
CX-LEM300
1. SERVICING NOTES
······················································· 3
2. GENERAL
·········································································· 5
3. DISASSEMBLY
3-1. Rear Cabinet ··································································· 7
3-2. CD Cabinet Section, Front Panel Section ······················· 8
3-3. CD Mechanism Deck ······················································ 8
3-4. CONTROL Board ··························································· 9
3-5. Tape Mechanism Deck ···················································· 9
3-6. Cassette Door Assy ······················································· 10
3-7. POWER Board, MAIN Board ······································ 10
3-8. Optical Pick-up (KSS-213E/C2N) ································ 11
3-2. CD Cabinet Section, Front Panel Section ······················· 8
3-3. CD Mechanism Deck ······················································ 8
3-4. CONTROL Board ··························································· 9
3-5. Tape Mechanism Deck ···················································· 9
3-6. Cassette Door Assy ······················································· 10
3-7. POWER Board, MAIN Board ······································ 10
3-8. Optical Pick-up (KSS-213E/C2N) ································ 11
4. MECHANICAL ADJUSTMENTS
····························· 12
5. ELECTRICAL ADJUSTMENTS
······························· 13
6. DIAGRAMS
······································································ 15
6-1. Block Diagram – CD Section – ··································· 17
6-2. Block Diagram – Main Section – ································ 18
6-3. Printed Wiring Board – CD Section – ························· 19
6-4. Schematic Diagram – CD Section – ···························· 20
6-5. Printed Wiring Boards – Main Section – ····················· 21
6-6. Schematic Diagram – Main Section – ························· 22
6-7. Printed Wiring Board – Control Section – ··················· 23
6-8. Schematic Diagram – Control Section – ······················ 24
6-9. Printed Wiring Board – Power Section – ····················· 25
6-10. Schematic Diagram – Power Section – ······················ 26
6-11. IC Pin Function Description ······································· 28
6-2. Block Diagram – Main Section – ································ 18
6-3. Printed Wiring Board – CD Section – ························· 19
6-4. Schematic Diagram – CD Section – ···························· 20
6-5. Printed Wiring Boards – Main Section – ····················· 21
6-6. Schematic Diagram – Main Section – ························· 22
6-7. Printed Wiring Board – Control Section – ··················· 23
6-8. Schematic Diagram – Control Section – ······················ 24
6-9. Printed Wiring Board – Power Section – ····················· 25
6-10. Schematic Diagram – Power Section – ······················ 26
6-11. IC Pin Function Description ······································· 28
7. EXPLODED VIEWS
7-1. Cabinet Section ····························································· 30
7-2. Front Panel Section ······················································· 31
7-3. CD Cabinet Section ······················································ 32
7-4. KSM-213EDP ······························································· 33
7-2. Front Panel Section ······················································· 31
7-3. CD Cabinet Section ······················································ 32
7-4. KSM-213EDP ······························································· 33
8. ELECTRICAL PARTS LIST
······································· 34
TABLE OF CONTENTS
3
CX-LEM300
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.
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.
other than those specified herein may result in hazardous
radiation exposure.
This appliance is classified as a CLASS 1 LASER product.
This label is located on the exterior.
This label is located on the exterior.
Laser component in this product is capable of emitting radiation
exceeding the limit for Class 1.
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.
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.
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
CHECK
Carry out the “S curve check” in “CD section adjustment” and check
that the S curve waveforms is output three times.
that the S curve waveforms is output three times.
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
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-
• 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-LEM300
Service Position of the CD Mechanism Deck
Service Position of the Tape Cassette Mechanism Deck
5
CX-LEM300
SECTION 2
GENERAL
This section is extracted
from instruction manual.
from instruction manual.
5
En
PARTS AND CONTROLS
Main unit: front
Refer to the pages indicated in parentheses for details.
1
2
2
6
5
4
7
3
8
1
POWER
6
STANDBY/ON (7)
Switches the unit on and off (standby).
2
ECO (7)
Sets the ECO mode on or off.
SYNCHRO REC (15)
Starts recording and CD play simultaneously.
REC START/PAUSE (15)
Starts and pauses recording.
RDS (10-12)
Activates RDS features.
3
PHONES jack
Plug in optional headphones set with a stereo mini plug
(ø3.5 mm). Speaker output is cancelled.
(ø3.5 mm). Speaker output is cancelled.
4
OPEN (8)
Opens or closes the disc compartment.
5 E
CD (7-9)
Starts and pauses CD play.
TUNER/BAND (7, 10)
Selects tuner function and the tuner band.
c
TAPE (REC MUTING) (7, 14, 15)
Starts playback.
Also used to enter 4-second blank spaces during
recording.
Also used to enter 4-second blank spaces during
recording.
AUX (7)
Selects the function of external equipment connected to
AUX IN jacks.
AUX IN jacks.
6
VOLUME (13, 16)
Adjusts the volume.
7 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.
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.
s
STOP (8, 9, 14, 15)
CD and tape: stops playback.
Tuner: clears a preset station.
Tuner: clears a preset station.
TONE (13)
Adjusts the bass or treble level.
8 z
PUSH EJECT (14, 15)
Opens or closes the cassette holder.
Main unit: rear
Refer to the pages indicated in parentheses for details.
3
4
5
2
1
1
AM jack 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 equipment.
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.
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 equipment.
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 WOOFER jack
Connect optional powered sub woofer with a built-in
amplifier to the jack.
amplifier to the jack.
4
SPEAKER terminals (4)
Connect the speaker cords of the supplied speakers.
5
AC power cord (4)
6
En
Remote commander
Refer to the pages indicated in parentheses for details.
1
4
5
6
7
6
7
9
8
!
@
#
#
0
2
3
Buttons with the same or similar names on the main unit
basically have the same function.
basically have the same function.
1
POWER (7)
2
1–10/0, >10 (8, 9, 11)
CD: selects a track of the specified number.
Tuner: tunes in the station with the specified preset
number.
Tuner: tunes in the station with the specified preset
number.
The numbered buttons take on these functions when pressed with
SHIFT held down:
SHIFT held down:
CLOCK (7)
Selects clock mode.
TIMER (16)
Selects timer mode.
TUNER MODE (10)
Switches between stereo or monaural FM reception.
3
SHUFFLE/PROGRAM (8, 9)
Selects shuffle or programmed CD playback mode.
REPEAT (8)
Selects repeat CD playback mode.
4
PRESET
N
,
M
(11)
f
/
r
,
t
/
g
(8, 10, 12-14, 16, 17)
ENTER (7, 10, 11, 16, 17)
Determines the mode.
Stores the received station to preset.
Stores the received station to preset.
5 E
CD (7-9)
TUNER/BAND (7, 10)
d
TAPE (7, 14)
Starts playback but cannot change the playback side.
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.
its function to that printed above the number.
8
MUTING (13)
To turn off the sound temporarily.
9
CLEAR (9, 11, 17)
CD: Clears a CD program.
Tuner: Clears a preset station.
Tuner: Clears a preset station.
0
TREBLE (13)
Adjusts the treble level.
BASS (13)
Adjusts the bass level.
! s
(8, 9, 14, 15)
@
FUNCTION (15)
Switches the active function among TAPE, TUNER, AUX
(VIDEO or TV) and CD.
(VIDEO or TV) and CD.
#
VOLUME
+
,
-
(13)
