DOWNLOAD Sony SRS-NWGU50 Service Manual ↓ Size: 921.98 KB | Pages: 22 in PDF or view online for FREE

Model
SRS-NWGU50
Pages
22
Size
921.98 KB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
srs-nwgu50.pdf
Date

Sony SRS-NWGU50 Service Manual ▷ View online

SERVICE MANUAL
Sony Corporation
Audio&Video Business Group
Published by Sony Techno Create Corporation
SRS-NWGU50
SPECIFICATIONS
ACTIVE SPEAKER SYSTEM
9-889-581-02
2010A05-1
© 
2010.01
US Model
Canadian Model
AEP Model
UK Model
Australian Model
Ver. 1.1  2010.01
• “WALKMAN” and 
 are registered trademarks of Sony Corporation.
•  All other trademarks and registered trademarks are trademarks or registered trademarks 
of their respective holders. In this manual, ™ and ® marks are not specifi ed.
Main unit
Continuous RMS power output (reference): 
10 W + 10 W (1 kHz, 10 % THD)
Inputs 
“WALKMAN” attachments 
 
For compatible “WALKMAN” models.
LINE IN  Stereo mini-jack
Speaker units 
 
57 mm dia.
Dimensions (w/h/d):   
Approx. 320 × 157 × 202 mm  
(12 ⅝ × 6 ¼ × 8 inch)
Mass 
Approx. 2.0 kg (4 lb 7 oz)
Supplied accessories
AC power Adaptor (1)
AC power cord (1)
Attachments for “WALKMAN” (2)
Remote commander (1)
Operating Instructions (1)
Design and specifications are subject to change 
without notice.
SRS-NWGU50
2
1. 
SERVICING  NOTES
  .............................................   3
2. DISASSEMBLY
2-1. Disassembly 
Flow 
...........................................................   4
2-2.  Bottom Cover Block .......................................................   4
2-3. MAIN 
Board 
...................................................................   5
2-4. Speaker 
Box 
Assy 
...........................................................   5
3. 
TEST  MODE 
 ............................................................   5
4. DIAGRAMS
4-1. Block 
Diagram 
................................................................   6
4-2. Printed 
Wiring 
Board 
- MAIN Board (Component Side) - ................................   8
4-3. Printed 
Wiring 
Board 
- MAIN Board (Conductor Side) - ..................................   9
4-4.  Schematic Diagram - MAIN Board (1/2) - .....................   10
4-5.  Schematic Diagram - MAIN Board (2/2) - .....................   11
4-6.  Printed Wiring Boards - PANEL Section - .....................   12
4-7.  Schematic Diagram - PANEL Section - ..........................   13
5. 
EXPLODED  VIEW
 ..................................................   17
6. 
ELECTRICAL  PARTS  LIST
  ..............................   18
Accessories are given in the last of the electrical parts list.
TABLE  OF  CONTENTS
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.
SAFETY  CHECK-OUT
After correcting the original service problem, perform the follow-
ing safety check before releasing the set to the customer:
Check the antenna terminals, metal trim, “metallized” knobs, 
screws, and all other exposed metal parts for AC leakage.
Check leakage as described below.
LEAKAGE  TEST
The AC leakage from any exposed metal part to earth ground and 
from all exposed metal parts to any exposed metal part having a 
return to chassis, must not exceed 0.5 mA (500 microamperes.). 
Leakage current can be measured by any one of three methods.
1.  A commercial leakage tester, such as the Simpson 229 or RCA 
WT-540A. Follow the manufacturers’ instructions to use these 
instruments.
2.  A battery-operated AC milliammeter. The Data Precision 245 
digital multimeter is suitable for this job.
3.  Measuring the voltage drop across a resistor by means of a 
VOM or battery-operated AC voltmeter. The “limit” indication 
is 0.75 V, so analog meters must have an accurate low-voltage 
scale. The Simpson 250 and Sanwa SH-63Trd are examples 
of a passive VOM that is suitable. Nearly all battery operated 
digital multimeters that have a 2 V AC range are suitable. (See 
Fig. A)
1.5 k
Ω
0.15 
μF
AC
voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
Fig. A.  Using an AC voltmeter to check AC leakage.
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.
ATTENTION  AU  COMPOSANT  AYANT  RAPPORT  
À  LA  SÉCURITÉ!
LES  COMPOSANTS  IDENTIFIÉS  PAR  UNE  MARQUE  
0  SUR  
LES  DIAGRAMMES  SCHÉMATIQUES  ET  LA  LISTE  DES  
PIÈCES  SONT  CRITIQUES  POUR  LA  SÉCURITÉ  DE  FONC-
TIONNEMENT.  NE  REMPLACER  CES  COMPOSANTS  QUE  
PAR  DES  PIÈCES  SONY  DONT  LES  NUMÉROS  SONT  DON-
NÉS  DANS  CE  MANUEL  OU  DANS  LES  SUPPLÉMENTS  
PUBLIÉS  PAR  SONY.
On safety
t  AC power cord must be changed only at the qualified 
service shop.
t  Do not use any other AC power adaptor.
 
Polarity of the plug
SRS-NWGU50
3
NOTE  THE  MOUNTED  PARTS  REPLACING
In each boards of the set, there are parts that cannot exchange a 
part.
Exchange mounted board when parts written “Not supplied” on 
the list of electrical parts are defective.
SECTION  1
SERVICING  NOTES
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!
• Strong 
viscosity
 
Unleaded solder is more viscous (sticky, less prone to fl ow) 
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.
SRS-NWGU50
4
SECTION  2
DISASSEMBLY
•  This set can be disassembled in the order shown below.
2-1.  DISASSEMBLY  FLOW
Note: Follow the disassembly procedure in the numerical order given.
2-2.  BOTTOM  COVER  BLOCK
Note:
 This illustration sees the set from bottom side.
SET
2-2.  BOTTOM COVER BLOCK
 (Page 
4)
2-3. MAIN 
BOARD
 (Page 
5)
2-4. SPEAKER 
BOX 
ASSY
 (Page 
5)
1 two foots
2 two screws
 (BVTP3 
u
 8)
2 four screws
 (BVTP3 
u
 8)
4 bottom cover block
3
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  • DOWNLOAD Sony SRS-NWGU50 Service Manual ↓ Size: 921.98 KB | Pages: 22 in PDF or view online for FREE
  • Here you can View online or download the Service Manual for the Sony SRS-NWGU50 in PDF for free, which will help you to disassemble, recover, fix and repair Sony SRS-NWGU50 Audio. Information contained in Sony SRS-NWGU50 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.