DOWNLOAD Sony MHC-GX99 / SA-WG99 Service Manual ↓ Size: 506.74 KB | Pages: 14 in PDF or view online for FREE

Model
MHC-GX99 SA-WG99
Pages
14
Size
506.74 KB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
mhc-gx99-sa-wg99.pdf
Date

Sony MHC-GX99 / SA-WG99 Service Manual ▷ View online

SERVICE MANUAL
Sony Corporation
Home Audio Division
Published by Sony Techno Create Corporation
US Model
Canadian Model
ACTIVE SUBWOOFER
9-887-535-01
2007A16-1
© 2007.01
Ver. 1.0  2007.01
SPECIFICATIONS
SA-WG99
• SA-WG99 is the sub woofer section
in MHC-GX99.
Speaker system: bass-reflex type
Speaker units
Woofer: 20 cm, cone type
Nominal impedance: 6 
Dimensions (w/h/d): Approx. 280 
× 306 × 405 mm
Mass: Approx. 8.7 kg
US model: 115 W
Canadian model: 155 VA
Design and specifications are subject to change without notice.
Power consumption:
Power requirement:
North American model: AC 120 V, 60 Hz
2
SA-WG99
SAFETY  CHECK-OUT
After correcting the original service problem, perform the following
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)
Fig. A.
Using an AC voltmeter to check AC leakage.
1.5 k
0.15 
µ
F
AC
voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
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
FONCTIONNEMENT.  NE  REMPLACER  CES  COM-  POSANTS
QUE  PAR  DES  PIÈCES  SONY  DONT  LES  NUMÉROS  SONT
DONNÉS  DANS  CE  MANUEL  OU  DANS  LES  SUPPLÉMENTS
PUBLIÉS  PAR  SONY.
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 viscou-s (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.
3
SA-WG99
SECTION 1
DIAGRAMS
Note on Printed Wiring Boards:
X
: Parts extracted from the component side.
•        
a
: Through hole.
:
 
Pattern from the side which enables seeing.
Note on Schematic Diagrams:
• All capacitors are in 
µ
F unless otherwise noted.  (p: pF) 50
WV or less are not indicated except for electrolytics and
tantalums.
2
: nonflammable resistor.
5
: fusible resistor.
• All resistors are in 
  and 
1
/
4
 
W or less unless otherwise
specified.
C
: panel designation.
A
: B+ Line.
B
: B– Line.
• Voltages and dc with respect to ground under no-signal
conditions.
no mark : Power on
• Voltages are taken with a VOM (Input impedance 10 M
).
Voltage variations may be noted due to normal production
tolerances.
• Signal path.
d
: AUDIO
THIS  NOTE  IS  COMMON  FOR  PRINTED  WIRING  BOARDS  AND  SCHEMATIC  DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
• Circuit Boards Location
   Note:
The components identi-
fied by mark 
0
  or dot-
ted line with mark 
0
 are
critical for safety.
Replace only with part
number specified.
   Note:
Les composants identifiés
par une marque 
0
 sont cri-
tiques pour la sécurité.
Ne les remplacer que par une
piéce por tant le numéro
spécifié.
POWER board 
MAIN board 
VOL-LED board
POWER SWITCH board
INPUT board
4
SA-WG99
IC Block Diagram
– MAIN Board –
IC400  STK404-130S
1
2
SUB
3
4
5
6
7
8
9
10
11
12
13
Pre DRIVER
Power STAGE
+
Bias
PT
-1
PT
-2
SW IN
SW IN NF
SUB
-PRE
+PRE (12V)
-VCC
+VCC
-RE
+RE
Page of 14
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Sony MHC-GX99 / SA-WG99 Service Manual ▷ Download

  • DOWNLOAD Sony MHC-GX99 / SA-WG99 Service Manual ↓ Size: 506.74 KB | Pages: 14 in PDF or view online for FREE
  • Here you can View online or download the Service Manual for the Sony MHC-GX99 / SA-WG99 in PDF for free, which will help you to disassemble, recover, fix and repair Sony MHC-GX99 / SA-WG99 Audio. Information contained in Sony MHC-GX99 / SA-WG99 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.