SA-WP780 - Sony Audio Service Manual (repair manual)

sa-wp780 service manual
Model
SA-WP780
Pages
14
Size
1.08 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
sa-wp780.pdf
Date

Read Sony SA-WP780 Service Manual online

SERVICE MANUAL
Sony Corporation
Home Audio Division
Published by Sony Techno Create Corporation
US Model
Canadian Model
AEP Model
UK Model
E Model
Australian Model
ACTIVE SUBWOOFER
9-887-104-06
2007G16-1
© 2007.07
Ver. 1.5  2007.07
SPECIFICATIONS
SA-WP780
• SA-WP780 is the sub woofer section in
HT-7000DH/7100DH/DDW780/DDW880/
DDW885/DDW900/DDW990/DDW995/
HTP-36DW/78DW.
Photo: SILVER
AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTAL HARMONIC 
DISTORTION:
(Models of area code US  only)
With 6 ohm loads, from 28 – 200 Hz; rated 120 
watts, minimum RMS power, with no more than 
0.7% total harmonic distortion from 250 
milliwatts to rated output.
Speaker system 
Active subwoofer,
magnetically shielded
Speaker unit 
200 mm (7 7/8 inches) 
cone type
Enclosure type 
Acoustically loaded bass
reflex
RMS output
Models of area code US, CND
150 W (6 ohms, 100 Hz, 
THD 10%)
Mod
Music power
Models of area code US, CND
Models of other area code
els of other area code 120 W (6 ohms, 100 Hz, 
THD 10%
200 W
190 W
)
Input 
LINE IN (input pin jacks)
Power requirements
Dimensions (w/h/d) (Approx.)
270 
× 331 × 380 mm
(10 5/8 
× 13 × 15 inches)
Mass (Approx.)
8.3
.     kg   (18 lb 5 oz)
Area code
Power requirements
US,  CND
120 V AC, 60 Hz
AEP, UK, RU
230 V AC, 50/60 Hz
AUS
240 V AC, 50 Hz
SP, SP6, AR
230 – 240 V AC,
50/60 Hz
E51
120/220/240 V AC,
50/60 Hz
Design and specifications are subject to change 
without notice.
Abbreviation
AR
: Argentine model
AUS
: Australian model
CND
: Canadian model
E51
: Chilean and Peruvian models
RU
: Russian model
SP
: Singapore model
SP6
: Singapore and Malaysia models
2
SA-WP780
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.
3
SA-WP780
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.
• Indication of transistor.
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.
F
: AUDIO
• Abbreviation
AR
: Argentine model
AUS
: Australian model
CND
: Canadian model
E51
: Chilean and Peruvian models
RU
: Russian model
SP
: Singapore model
SP6
: Singapore and Malaysia models
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
   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.
• Circuit Boards Location
C
B
These are omitted.
E
Q
B
These are omitted.
C
E
B
These are omitted.
C
E
Q
INPUT CONTROL board
SWITCH board
LED board
MAIN board
POWER TRANS board 
Ver. 1.3
4
SA-WP780
IC Block Diagrams
– MAIN Board –
IC202, IC203  NJM4565D
A
B
1
A OUTPUT
2
A -INPUT
3
A +INPUT
4
V-
7 B OUTPUT
6 B -INPUT
5 B +INPUT
8 V+
IC500  uPC1237C-A
SWITCH FOR
LATCH/AUTOMATIC
RESET
OUTPUT
OFFSET
DETECTOR
OVERLOAD
DETECTOR
AC-OFF
DETECTOR
FLIP-FLOP
OUTPUT
OFFSET
DETECTOR
OUTPUT
OFFSET
DETECTOR
1
LOADOVER
2
DETECT DC
3
RESET
4
OFF AC
6
DRIVER
RELAY
5
GND
7
OFF AC
8
VCC
Page of 14
Display

Download Sony SA-WP780 Service Manual (Repair Manual)

Here you can read online and download Sony SA-WP780 Service Manual in PDF. SA-WP780 service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sony SA-WP780 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.