Read Sony STR-LSA1 Service Manual online
STR-LSA1
AEP Model
UK Model
E Model
Australian Model
SERVICE MANUAL
FM STEREO FM-AM RECEIVER
SPECIFICATIONS
Amplifier section
Power output 50 W + 50 W (4 ohms
DIN, 1 kHz)
Frequency response
7 Hz - 20 kHz
±0.3dB
Tone control
Bass: 100 Hz
±10 dB
Midrange: 1 kHz
±10 dB
Treble: 10 kHz
±10 dB
Analog input Sensitivity: 250 mV
Impedance: 50 kilohms
Headphone output
Accepts low and high
impedance
FM tuner section
Tuning range 87.5 - 108.0 MHz
Antenna terminal
75 ohms, unbalanced
Sensitivity
Mono: 7
µV/22.1 dBf
Stereo: 70
µV/42.1 dBf
THD
Mono: 0.3% at 1 kHz
Stereo: 0.5% at 1 kHz
Stereo: 0.5% at 1 kHz
Selectivity
55 dB at 400 kHz
Separation
35 dB at 1 kHz
Intermediate frequency
10.7 MHz
AM tuner section
Tuning range 531 - 1602 kHz
Antenna
Loop antenna
THD
0.5% at 400 Hz
Selectivity
35 dB at 9 kHz
Intermediate frequency
450 kHz
General
Power requirements
230 V AC, 50/60 Hz
Power consumption
140 W
Dimensions (w/d/h)
430
× 335 × 70 mm
including projecting
parts and controls
Mass (Approx.)
6.3 kg
Supplied accessories
Design and specifications are subject
to change without notice.
to change without notice.
• AM loop antenna (1)
• Remote commander (remote) (1)
• Remote commander (remote) (1)
2
TABLE OF CONTENTS
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.
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be
• Notice that the minus side of a tantalum capacitor may be
damaged by heat.
Flexible Circuit Board Repairing
• Keep the temperature of 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.
SERVICE NOTE
• When you want raise the DAC board in order to perform any
repair work, use the jig as shown.
Note:
Route the AC power cord making a loop so that the AC power cord
is routed around the screw hole.
is routed around the screw hole.
Jig No.
(J-2501-009-A)
(J-2501-009-A)
DAC board
AC power cord
SERVICE NOTE
····································································· 2
1. GENERAL
·········································································· 3
2. DISASSENBLY
································································· 9
3. TEST MODE
···································································· 13
4. DIAGRAMS
4-1. Circuit Boards Location ·············································· 17
4-2. Block Diagram Digital Section ······························· 18
4-3. Block Diagram Main/Power Section ······················· 19
4-4. Printed Wiring Board Digital Section ····················· 20
4-5. Schematic Diagram Digital Section (1/2) ··············· 22
4-6. Schematic Diagram Digital Section (2/2) ··············· 23
4-7. Printed Wiring Board DAC Section ························ 24
4-8. Schematic Diagram DAC Section (1/2) ·················· 26
4-9. Schematic Diagram DAC Section (2/2) ·················· 27
4-10. Schematic Diagram Display Section ······················· 28
4-11. Printed Wiring Board Display Section ···················· 29
4-12. Schematic Diagram Main/Power Section ················ 30
4-13. Printed Wiring Board Main/Power Section ············· 31
4-14. IC Pin Function ··························································· 32
4-15. IC Block Diagrams ······················································ 33
4-2. Block Diagram Digital Section ······························· 18
4-3. Block Diagram Main/Power Section ······················· 19
4-4. Printed Wiring Board Digital Section ····················· 20
4-5. Schematic Diagram Digital Section (1/2) ··············· 22
4-6. Schematic Diagram Digital Section (2/2) ··············· 23
4-7. Printed Wiring Board DAC Section ························ 24
4-8. Schematic Diagram DAC Section (1/2) ·················· 26
4-9. Schematic Diagram DAC Section (2/2) ·················· 27
4-10. Schematic Diagram Display Section ······················· 28
4-11. Printed Wiring Board Display Section ···················· 29
4-12. Schematic Diagram Main/Power Section ················ 30
4-13. Printed Wiring Board Main/Power Section ············· 31
4-14. IC Pin Function ··························································· 32
4-15. IC Block Diagrams ······················································ 33
5. EXPLODED VIEWS
5-1. MAIN SECTION ························································ 36
5-2. CHASSIS SECTION ··················································· 37
5-2. CHASSIS SECTION ··················································· 37
6. ELECTRICAL PARTS LIST
······································· 38
3
SECTION 1
GENERAL
This section is e
xtr
acted
acted
from instr
uction man
ual.
10
GB
Front Panel Parts
Description
Description
1
?/1 switch
Press to turn the receiver on and off.
To avoid damaging your speakers, be sure to rotate the
VOLUME control counterclockwise immediately after
you turn on the receiver.
Press to turn the receiver on and off.
To avoid damaging your speakers, be sure to rotate the
VOLUME control counterclockwise immediately after
you turn on the receiver.
STANDBY indicator
Lights up when the receiver is turned off.
Lights up when the receiver is turned off.
2
Remote sensor
When using the supplied remote, point it towards this
sensor (
When using the supplied remote, point it towards this
sensor (
).
3
SLEEP indicator
Lights up when the Sleep Timer function is activated
(page 24).
Lights up when the Sleep Timer function is activated
(page 24).
4
H.A.T.S. indicator
Lights up during H.A.T.S. (High-quality digital Audio
Transmission System) function is activated (page 25).
Lights up during H.A.T.S. (High-quality digital Audio
Transmission System) function is activated (page 25).
5
DISPLAY button
Press repeatedly to change the information in the
display window as follows:
Press repeatedly to change the information in the
display window as follows:
v
Index name of the component
1)
v
Model name of the component
2)
When the built-in tuner is selected
v
Index name of the preset station
1)
or program
station name
3)
v
Frequency
1) An index name appears only if one has been assigned to the
selected component or preset station (page 22).
2) If the model name isn’t known, the category of the component
appears (e.g., “CD” or “MD”). If the category isn’t known,
“Unknown” appears.
“Unknown” appears.
3) Appears only during RDS reception (page 18).
When you press the DISPLAY button while the Ping
function is on, “N N n n” appears for a few
seconds in the display of the currently selected
component (page 25).
function is on, “N N n n” appears for a few
seconds in the display of the currently selected
component (page 25).
Location of
Parts
Parts
This chapter provides information
about the location and function of the
buttons and controls on the front
panel and supplied remote.
about the location and function of the
buttons and controls on the front
panel and supplied remote.
11
GB
Location kf Parts
6
Display
Shows various types of information.
Shows various types of information.
7
BAND/< button
Selects the FM or AM band. If you press this button
while the receiver is turned off, the receiver
automatically turns on and tunes to the station that
was last received.
Use this button to move the cursor when entering an
index name for a component or preset station.
Selects the FM or AM band. If you press this button
while the receiver is turned off, the receiver
automatically turns on and tunes to the station that
was last received.
Use this button to move the cursor when entering an
index name for a component or preset station.
8
TUNE MODE/> button
When the built-in tuner is selected, press to select the
tuning mode. The mode indication appears in the
display as follows:
When the built-in tuner is selected, press to select the
tuning mode. The mode indication appears in the
display as follows:
To select
Press TUNE MODE repeatedly
to light up
to light up
Manual Tuning
MANUAL
Automatic Tuning
AUTO
Preset Tuning
PRESET
Use this button to move the cursor when entering an
index name for a component or preset station.
index name for a component or preset station.
9
Jog dial
Rotate to select the program source, tune to stations,
preset the stations, enter index names, or change
settings.
Rotate to select the program source, tune to stations,
preset the stations, enter index names, or change
settings.
q;
JOG MENU button
Press repeatedly to change the jog dial function. The
indication corresponding to the jog dial function
appears in the display as follows:
Press repeatedly to change the jog dial function. The
indication corresponding to the jog dial function
appears in the display as follows:
To
Press JOG MENU repeatedly to
display
display
Select a component
A component name
Adjust the sound
Sound Menu
Make various settings
Setup Menu
Receive broadcasts*
Station name or frequency
*
Selectable only when the built-in tuner is selected.
After a component name appears
Rotate the jog dial to select the component you want to use.
After “Sound Menu” appears
You can use the jog dial and ENTER button to adjust the
sound (page 14).
sound (page 14).
After “Setup Menu” appears
You can use the jog dial and ENTER button to preset radio
stations (page 19), name preset stations or connected
components (page 22), or make other settings (page 24).
stations (page 19), name preset stations or connected
components (page 22), or make other settings (page 24).
After a station name or frequency appears
You can use the jog dial to select a preset station (page 20) or
tune to a radio station either manually (page 18) or
automatically (page 19).
tune to a radio station either manually (page 18) or
automatically (page 19).
qa
ENTER button
Press to enter a setting made with the jog dial.
Press to enter a setting made with the jog dial.
qs
VOLUME control
After turning on the selected component, rotate to
adjust the volume.
After turning on the selected component, rotate to
adjust the volume.
qd
MUTING indicator
Lights up when the MUTING button on the supplied
remote is pressed.
Lights up when the MUTING button on the supplied
remote is pressed.
qf i
connector
Connects headphones. When the headphones are
connected, the kutput to the speakers is automatically
cut off.
connected, the kutput to the speakers is automatically
cut off.
i
I
BAND
TUNE MODE
JOG MENU
ENTER
MUTING
VOLUME
STANDBY
SLEEP
H.A.T.S
DISPLAY
?/1
A
N
M
B
E
C D
G
F
H
J K L
I
4
12
GB
Location of Parts
Remote Parts Description
A
Q
P
H
O
N
M
M
K
J
L
D
C
B
E
F
G
I
PRESET
CD
TUNER
SLEEP
SHIFT FM MODE
DISPLAY
MD
EQ
DIMMER
FUNCTION
MID
BASS
TREBLE
EQ
BANK
VOL
MUTING
RECEIVER
BAND
?/1
–
–
+
–
+
–
+
–
+
.
>
N
.
>
N
X
x
+
+
–
X
x
1
?/1 switch
Press to turn the receiver on and off. When the
receiver is turned off, the STANDBY indicator on the
receiver turns on.
To avoid damaging your speakers, be sure to rotate the
VOLUME control on the receiver counterclockwise
immediately after you turn on the receiver.
Press to turn the receiver on and off. When the
receiver is turned off, the STANDBY indicator on the
receiver turns on.
To avoid damaging your speakers, be sure to rotate the
VOLUME control on the receiver counterclockwise
immediately after you turn on the receiver.
2
FUNCTION +/– buttons
Press these buttons repeatedly to select the component
you want to use.
Press these buttons repeatedly to select the component
you want to use.
3
FM MODE button
If “STEREO” flashes in the display and the FM stereo
reception is poor, press this button. “MONO” lights
up in the display and there will be no stereo effect, but
the sound will improve.
If “STEREO” flashes in the display and the FM stereo
reception is poor, press this button. “MONO” lights
up in the display and there will be no stereo effect, but
the sound will improve.
4
VOL +/– buttons
Press these buttons repeatedly to adjust the volume.
Press these buttons repeatedly to adjust the volume.
5
MUTING button
Press to mute the sound output from the receiver.
When the sound is muted, the MUTING indicator on
the receiver lights up.
Press to mute the sound output from the receiver.
When the sound is muted, the MUTING indicator on
the receiver lights up.
6
EQ BANK button
Press repeatedly to select a preset equalizer setting.
Press repeatedly to select a preset equalizer setting.
7
TREBLE +/– buttons
After selecting preset equalizer setting, press
repeatedly to adjust the treble level.
After selecting preset equalizer setting, press
repeatedly to adjust the treble level.
8
MID +/– buttons
After selecting preset equalizer setting, press
repeatedly to adjust the midrange level.
After selecting preset equalizer setting, press
repeatedly to adjust the midrange level.
9
BASS +/– buttons
After selecting preset equalizer setting, press
repeatedly to adjust the bass level.
After selecting preset equalizer setting, press
repeatedly to adjust the bass level.
13
GB
Location kf Parts
q;
MD deck operation buttons
Use these buttons to operate a Sony MD deck.
Use these buttons to operate a Sony MD deck.
MD N button
Press to start playback on the MD deck.
Press to start playback on the MD deck.
MD X button
Press to pause playback on the MD deck.
Press to pause playback on the MD deck.
MD x button
Press to stop playback on the MD deck.
Press to stop playback on the MD deck.
MD ./> buttons
Press to locate a track on the MD deck.
Press to locate a track on the MD deck.
Note
This remote transmits Sony MD1 codes.
qa
CD player operation buttons
Use these buttons to operate a Sony CD player.
Use these buttons to operate a Sony CD player.
CD N button
Press to start playback on the CD player.
Press to start playback on the CD player.
CD X button
Press to pause playback on the CD player.
Press to pause playback on the CD player.
CD x button
Press to stop playback on the CD player.
Press to stop playback on the CD player.
CD ./> buttons
Press to locate a track on the CD player.
Press to locate a track on the CD player.
Note
This remote transmits Sony CD1 codes.
qs
PRESET +/– buttons
Press repeatedly to tune in a preset station.
Press repeatedly to tune in a preset station.
qd
SHIFT button
Changes the memory page containing preset stations.
Changes the memory page containing preset stations.
qf
BAND button
Selects the FM or AM band. If you press this button
while the receiver is turned off, the receiver
automatically turns on and tunes to the station that
was last received.
Selects the FM or AM band. If you press this button
while the receiver is turned off, the receiver
automatically turns on and tunes to the station that
was last received.
qg
SLEEP button
Press to activate the Sleep Timer function. When the
Sleep Timer function is activated, the SLEEP indicator
on the receiver lights up.
Press to activate the Sleep Timer function. When the
Sleep Timer function is activated, the SLEEP indicator
on the receiver lights up.
qh
DIMMER button
Press repeatedly to change the brightness level of the
display.
Press repeatedly to change the brightness level of the
display.
qj
DISPLAY button
Press repeatedly to select the information to be
displayed. This button has the same function as the
DISPLAY button on the receiver (5 in page 10).
Press repeatedly to select the information to be
displayed. This button has the same function as the
DISPLAY button on the receiver (5 in page 10).
