DOWNLOAD Sony ST-SDB900 Service Manual ↓ Size: 1.44 MB | Pages: 26 in PDF or view online for FREE

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

Sony ST-SDB900 Service Manual ▷ View 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 ]
Page of 26
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Sony ST-SDB900 Service Manual ▷ Download

  • DOWNLOAD Sony ST-SDB900 Service Manual ↓ Size: 1.44 MB | Pages: 26 in PDF or view online for FREE
  • Here you can View online or download the Service Manual for the Sony ST-SDB900 in PDF for free, which will help you to disassemble, recover, fix and repair Sony ST-SDB900 Audio. Information contained in Sony ST-SDB900 Service Manual (repair manual) includes:
  • Disassembly, troubleshooting, maintenance, adjustment, installation and setup instructions.
  • Schematics, Circuit, Wiring and Block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Exploded View and Parts List.