ST-SDB900 - Sony Audio Service Manual (repair manual)

Model
ST-SDB900
Pages
26
Size
1.44 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
st-sdb900.pdf
Date

View Sony ST-SDB900 Service Manual online

ST-SDB900
AEP Model
UK Model
SERVICE MANUAL
DAB/FM/AM TUNER
Sony Corporation
Audio Group
Published by Sony Engineering Corporation
9-879-012-02
2004H02-1
© 2004.08
SPECIFICATIONS
Ver 1.1  2004.08
Manufactured under license from Dolby Laboratories.
“Dolby”, “Pro Logic” and the double-D symbol are
trademarks of Dolby Laboratories.
“DTS” and “DTS Digital Surround” are trademarks of Digital
Theater Systems, Inc.
DAB tuner section
Frequency range
174.928 (5A) – 239.200 (13F) MHz
For details, see “DAB frequency table”
below.
Sensitivity
–99 dBm
Signal-to-noise ratio
97 dB
THD+N
0.009% (1 kHz)
Channel separation
87 dB (1 kHz)
Selectivity
40 dB (at adjacent channel)
Frequency response
+0.5/–0.5 dB (5 Hz – 20 kHz)
Digital output
Optical
Sampling frequency:
48 kHz
Aerial terminal
75 
Ω, F female
Analog output level
2 Vrms
FM tuner section
Frequency range
87.5 – 108.0 MHz (50 kHz step)
IHF Sensitivity
1.0 
µV
Signal-to-noise ratio
at 40 kHz deviation 70 dB (stereo)
THD+N
1 kHz, 40 kHz deviation 0.5% (stereo)
Channel separation
45 dB (1 kHz)
Selectivity
at 400 kHz 60 dB
Frequency response
+0.5/–2.0 dB (30 Hz – 15 kHz)
Aerial terminal
75 
Ω, IEC male
AM tuner section
Frequency range
531 – 1,602 kHz (9 kHz step)
Sensitivity
(with AM loop aerial)
330 
µV/m
Signal-to-noise ratio
54 dB
THD+N
0.5% (400 Hz)
Selectivity
at 9 kHz 35 dB
Aerial terminal
Push lever
General
Power requirements
230 V AC, 50/60 Hz
Power consumption
12 W
Dimensions
430 x 85 x 300 mm (w/h/d)
Weight
4.5 kg
Remote control capabilityIR
Station preset capacity
DAB maximum of 99
FM maximum of 30
AM maximum of 30
Supplied accessories
• Audio cord (1)
• AM loop aerial (1)
• FM wire aerial (1)
• DAB wire aerial (1)
• Remote commander (1)
• R6 (size AA) batteries (2)
Design and specifications are subject to change without notice.
ST-SDB900
2
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!
TABLE OF CONTENTS
1.
GENERAL
...................................................................
3
2.
TEST MODE
...............................................................
4
3.
DIAGRAMS
3-1.
Block Diagram ................................................................
9
3-2.
Printed Wiring Board – MAIN Board (Side A) – ............ 10
3-3.
Printed Wiring Board – MAIN Board (Side B) – ............ 11
3-4.
Schematic Diagram – MAIN Board (1/3) – .................... 12
3-5.
Schematic Diagram – MAIN Board (2/3) – .................... 13
3-6.
Schematic Diagram – MAIN Board (3/3) – .................... 14
3-7.
Printed Wiring Board
– TRANS, AC SW, JOG, RM Board – ............................ 15
3-8.
Printed Wiring Board – DISPLAY Board – .................... 16
3-9.
Schematic Diagram – DISPLAY Board – ....................... 17
4.
EXPLODED VIEWS
4-1.
Case, Front Panel Section ................................................ 20
4-2.
Chassis Section ................................................................ 21
5.
ELECTRICAL PARTS LIST
.................................. 22
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 NUM-
BERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLE-
MENTS PUBLISHED BY SONY.
• Strong viscosity
Unleaded solder is more viscous (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.
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.
DAB frequency table
Band-III (174 to 240 MHz)
Frequency
Label
Frequency
Label
174.928MHz
5A
209.936MHz
10A
176.640MHz
5B
211.648MHz
10B
178.352MHz
5C
213.360MHz
10C
180.064MHz
5D
215.072MHz
10D
181.936MHz
6A
216.928MHz
11A
183.648MHz
6B
218.640MHz
11B
185.360MHz
6C
220.352MHz
11C
187.072MHz
6D
222.064MHz
11D
188.928MHz
7A
223.936MHz
12A
190.640MHz
7B
225.648MHz
12B
192.352MHz
7C
227.360MHz
12C
194.064MHz
7D
229.072MHz
12D
195.936MHz
8A
230.784MHz
13A
197.648MHz
8B
232.496MHz
13B
199.360MHz
8C
234.208MHz
13C
201.072MHz
8D
235.776MHz
13D
202.928MHz
9A
237.488MHz
13E
204.640MHz
9B
239.200MHz
13F
206.352MHz
9C
208.064MHz
9D
* This tuner does not support L-Band reception.
Ver 1.1
Note on DAB TUNER MODULE exchange
Since this connector tends to break, be careful of handling.
When exchanging DAB TUNER MODULE and hard to remove 
a cable, please also exchange cables together.
DAB TUNER MODULE
Cable
Main board
ST-SDB900
3
SECTION 1
GENERAL
This section is extracted
from instruction manual.
Main  unit
 (remote sensor) 
2 POWER switch
3 BAND 
4 Display window 
5 MENU 
6 TUNING/SELECT 
7 ENTER
8 MEMORY
9 DISPLAY
q; TUNING MODE
List of button locations and reference pages
2
8
9
6
5
3
4
7
1
q;
4
ST-SDB900
SECTION 2
TEST MODE
1.
Entering test mode
1. Turn OFF the power.
2. While pressing [DISPLAY] button and [MENU] button together, turn ON the [POWER] button.
3. When test mode starts “DIAG MENU” is displayed for a few seconds, then test mode starts.
2.
Leaving test mode
1. Turn OFF the power.
3.
Selecting the test mode
When you enter test mode, if you turn the [TUNING/SELECT] JOG dial, this switches the display to the test menu.
3-1.
Restoring the factory settings
1. Enter test mode, then turn the [TUNING/SELECT] dial to display “FACTORY RESET”.
Screen display
2. Press the [ENTER] button. The “Executing” display.
Screen display
3. After 3-4 seconds, the “Executing” disappears. Factory Reset is completed.
Screen display
[Contents of factory settings]
• BAND
................. DAB
• DAB Module ................. Service List Clear
................. DRC Off
................. DAB preset all clear
• FM Mode
................. STEREO
• 30 FM Preset ................. All 87.50 MHz
• 30 AM Preset ................. All 531 kHz
• Preset Station Name ........ All clear
• DIMMER Full (duty 100)
[ FACTORY RESET ]
FACTORY RESET
TUNING/SELECT
TUNING/SELECT
FL/KEY TEST
dial
dial
VERSION
Version display
Fluorescent lamp display and button test
Restores the factory settings
[ FACTORY RESET ]
[ FACTORY RESET ]
Executing
[ FACTORY RESET ]
5
ST-SDB900
3-2.
FL/KEY TEST  MODE
1. Enter test mode, then turn the [TUNING/SELECT] dial to display “FL/KEY TEST”.
Screen display
2. Press the [ENTER] button. The entire screen lights up.
   Screen display
3. Turning the [TUNING/SELECT] dial displays the dial check screen. When you turn the [TUNING/SELECT] dial left and right, the character
display moves left and right.
   Screen display
4. To check operation of each button, press it and verify that the corresponding display goes out.
[BAND] button ................. “TP” display
[TUNING MODE] button ..... “MONO” display
[DISPLAY] button ..............  “DRC” display
[MENU] button .................  “TUNED” display
[ENTER] button .................  “PRESET” display
[MEMORY] button ..............  “PTY” display
5. Press the [DAB] button on remote control after checking front panel button, “O” and “K” light up on a character display.
6. Turn OFF the power.
3-3.
VERSION display
1. Enter test mode, then turn the [TUNING/SELECT] dial to display “VERSION”.
Screen display
2. Press the [ENTER] button. The System Version is displayed.
Screen display
3. Turn the [TUNING/SELECT] to the right to display the DAB version.
Screen display
Turn the [TUNING/SELECT] dial to the left to display the System Version.
4. Press the [ENTER] button to return to test mode.
[ FL / KEY TEST ]
SECONDARY
RDS TP
STEREOMONO
TUNED
PTY
MEMORY
DAB
FM
AM
MANUAL
PRESET
AUTO
DUAL DRC
TP
MONO
TUNED
PTY
DAB
AM
PRESET
DRC
Character display
[ VERSION ]
[ VERSION ]
sys   v1.03     4415
Syscon Firmware
Version
Check sum
[ VERSION ]
dev   v1.8 - 3
DAB Module Firmware Version
6
ST-SDB900
4.
Temporary PRESET setting mode
This device is not adjusted but reception can be checked with the temporary Preset values.
1. Turn OFF the power.
2. While pressing [DISPLAY] button and [MEMORY] button together, turn ON [POWER] button.
3. When you enter temporary PRESET setting mode, the “MEMORY” display flashes.  The only difference in this mode is the use of the
temporary Preset values.  Otherwise, operation is normal.
4. For the FM and AM band, the PRESET values are as follows.
5. For the DAB band, there are no temporary Preset values.
Instead, the CH labels handle this with “MENU” - “DAB TUNE AID” as follows.
6. End temporary PRESET mode with a Power OFF.
FM band
AM band
FM01
87.50 MHz
AM01
531 kHz
FM02
88.00 MHz
AM02
603 kHz
FM03
98.00 MHz
AM03
999 kHz
FM04
100.00 MHz
AM04
1404 kHz
FM05
106.00 MHz
AM05
1602 kHz
FM06
108.00 MHz
DAB band
5A
(174.928 MHz)
5B
(176.640 MHz)
8D
(201.072 MHz)
12B
(225.648 MHz)
13F
(239.200 MHz)
7
ST-SDB900
SECTION  3
DIAGRAMS
• Circuit Boards Location
RM board
DISPLAY board
JOG board
tuner unit
DAB tuner module 
MAIN board
TRANS board
AC SW board
8
ST-SDB900
• Waveforms
Note on Schematic Diagram:
• All capacitors are in 
µ
F unless otherwise noted.  (p: pF)
50 WV or less are not indicated except for electrolytics and
tantalums.
• All resistors are in 
  and 
1
/
4
 
W or less unless otherwise
specified.
•      %
: indicates tolerance.
•         
f
: internal component.
2
: nonflammable resistor.
C
: panel designation.
A
: B+ Line.
B
: B– Line.
• Voltages and waveforms are dc with respect to ground un-
der no-signal conditions.
No mark : FM
• Voltages are taken with a VOM (Input impedance 10 M
).
Voltage variations may be noted due to normal production
tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal production
tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F
: FM
g
: ANALOG OUT
I
: DIGITAL OUT
NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
(In addition to this necessary note is printed in each block.)
Note on Printed Wiring Board:
X
: parts extracted from the component side.
a
: Through hole.
: Pattern from the side which enables seeing.
Caution:
Pattern face side: Parts on the parts face side seen from
(Side A)
the parts face are indicated.
Parts face side:
Parts on the pattern face side seen from
(Side B)
the pattern face are indicated.
Note: The components identified by mark 
0
 or dotted
line with mark 
0
 are critical for safety.
Replace only with part number specified.
– MAIN Board –
1.8432 MHz
2V AC/DIV
0.2 
µ
sec/DIV
4.5 Vp-p
1
  IC300  
wl
  SCKO
16 MHz
0.5V AC/DIV
50nsec/DIV
1 Vp-p
2
  IC300  
is
  XO
9
9
ST-SDB900
ST-SDB900
3-1. BLOCK DIAGRAM
DAB 
MODULE
AUDIO_LEFT_OUT
AUDIO_RIGHT_OUT
Q151,
D101-103
OR GATE
SPDIF
S1_IN
S1_DOUT
DAB_OUT
DAB_IN
AM
AC_STOP
86
EEPROM
IC301
IC401
MUTE
Q200
MUTE
Q250
L
R
J201
ANALOG
OUT
DAB
DIGITAL
OPTICAL OUT
59
FL-DATA
53
IC300
SYSTEM CONTROL
52
43
75
74
DAB_IO1
28
DAB_IO2
27
DAB_OUT
DAB_IN
FLASH1
AC_STOP
X_L_MUTING 85
RSTX
77
SDA
34
X0
82
X1
83
SCL
33
X301
16MHz
5
6
54
SIRCS
60
FL CLK
63
FL-CS1
62
FL-CS0
61
FL RST
IC800
FL DRIVER
DA
63
CP
62
CS
61
RESET
60
4
AD1
3
AD2
P36-70
P1-35
5
39
40
55
SEG1
SEG35
COM1
COM16
FLUORESCENT
INDICATOR
TUBE
NC
FL800
IC801
FL DRIVER
DA
63
CP
62
CS
61
RESET
60
4
AD1
3
AD2
5
39
SEG1
SEG35
FF1
FF2
SIRCS
IC802
1
38
KEY_AD0
39
KEY_AD1
55
KEY3
FUNCTION
KEY
ROTARY
ENCORDER
RV801
S831-833
D201
AC
IN
S901
POWER
-30V REG
Q912
IC907
+5V
REG
5
4
FL -30V
D922-924
Q909
5
4 AC DETECT
IC912
D918
AU -6V
RECT
D901-904
IC901
+10V
REG
1
3
D919
FM+3.3V
D+3.3V
IC903
-6V
REG
2
3
RECT
D911
T901
AU +6V
FM +10V
T902
MUTE +3.3V
POWER
CONTROL
Q910,911
30
DAB_PWR
48
AC_STOP
: DIGITAL OUT
: FM
• Signal path
: ANALOG OUT
GATE
IC403
P36
P71
P72
G1-16
66
JOG_P
67
JOG_M
S841-843
RECT
D914-916
Q910
FMAM +3.3V
DAB +5V
POWER
CONTROL
Q906,908
31
DAB_PWR5
IC910
+3.3V
REG
2
3
D913
IC911
+3.3V
REG
1
2
1
Q202
BUFFER
IC200
Q201
4
DABSEL
4
12
13
3
5
11
9
LPF
IC202
AMP
IC203
FM
COAXIAL
75
FM/AM
TUNER
ANTENA
LCH
RCH
CE
TUNED
STEREO
MUTING
FM_S-METER
RDS_INT
RDS_DATA
SLATCH
TUNED
STEREO
TU_MUTING
S-METER
RDS_INT
RDS_DATA
DAB
COAXIAL
75
ANTENA
CL
DO
DI
TUN_CLK
TUN_DIO2
TUN_DIO1
73
78
14
76
15
SLATCH
TUNED
STEREO
TU_MUTING
S-METER
RDS_INT
RDS_DATA
TUN_CLK
TUN_DIO2
TUN_DIO1
SLATCH
TUNED
STEREO
TU_MUTING
FM_SIG_OUT
RDS_INT
RDS_DATA
TUN_CLK
TUN_DIO2
TUN_DIO1
D +3.3V
IC100
RESET
2
1
1
2
3
6
7
8
FLASH2
RESET
MD0
MD2
51
49
MD0
MD2
FLASH2
FLASH1
FLASH1
FLASH2
WP
32
7
SDA
SCL
WP
X1
83
X302
1.8432MHz
2
POWER
TRNSFORMER
IC902
+6V
REG
1
3
14
IC201
SELECTOR
DIGITAL
TRNSMITTER
CN306
FLASH
PROGRAM
TUNING/
SELECT
REMOTE
SENSOR
D930
10
10
ST-SDB900
ST-SDB900
3-2. PRINTED WIRING BOARD — MAIN BOARD (SIDE A) —
 See page 7 for Circuit Boards Location.
 :Uses unleaded solder.
        
        
 
C410
X301
R9067 R9066
R608
R392
R391
R378
R376
R374
R373
R353
R352
R351
R350
R349
R346
R344
R343
R331
R329
R302
R301
R335
R106
R105
IC300
IC100
FB377
FB329
FB301
FB101
FB100
R217
X302
C912
C382
C381
C367 C366
C351
C349
C377
C343
C335
C323
1
30
80
3
1
4
5
51
31
50
100
81
C302
C107
C108
C109
C113
C114
Q201
R904
R903
Q911
Q910
E
E
Q908
Q906
IC403
D918
D930
D910
IC201
R403
1
3
5
4
FB300
C105
Q202
CN300
1
2
3
4
MAIN BOARD (SIDE A)   
11
(11)
1-862-510-
1
8
16
9
E
E
E
E
2
3
4
5
6
7
8
9
A
1
B
C
D
E
F
G
H
• Semiconductor
Location
Ref. No.
Location
D910
B-2
D918
B-2
D930
B-3
IC100
F-2
IC201
D-7
IC300
F-2
IC403
F-8
Q201
D-8
Q202
F-8
Q910
E-3
Q911
E-3
Q906
E-5
Q908
E-8

Download Sony ST-SDB900 Service Manual (Repair Manual)

Here you can view online and download Sony ST-SDB900 Service Manual in PDF. ST-SDB900 service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sony ST-SDB900 Audio. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.