SERVICE MANUAL
Sony Corporation
Audio Group
Published by Sony Engineering Corporation
US Model
SUB WOOFER
9-879-650-01
2005E04-1
© 2005.05
Ver. 1.0 2005.05
SPECIFICATIONS
SA-WMSP69
AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTAL HARMONIC
DISTORTION:
With 6 ohm loads, from 28 200 Hz; rated 120
watts, minimum RMS power, with no more than
0.8% total harmonic distortion from 250
milliwatts to rated output.
Speaker system
Active subwoofer,
magnetically shielded
Speaker unit
250 mm cone type
Enclosure type
Acoustically loaded bass
reflex
RMS output
160 W (6 ohms, 100 Hz,
THD 10%)
Input
LINE IN (input pin jacks)
Power requirements
120 V AC, 60 Hz
Power consumption
120 W
Dimensions (w/h/d) (Approx.)
337
× 410 × 366 mm
(13 1/4
× 16 1/8 × 14 1/2 inches)
including front panel
Mass (Approx.)
13.0 kg (28 lb 11 oz)
Design and specifications are subject to change without
notice.
· SA-WMSP69 is the subwoofer section
in HT-6900DP/9900M.
2
SA-WMSP69
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.
·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 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.
1.5 k
0.15 µF
AC
voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
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 microampers.).
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" indica-
tion 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)
TABLE OF CONTENTS
1.
DIAGRAMS
1-1.
Circuit Boards Location ..................................................
3
1-2.
Schematic Diagram Main Section .............................
5
1-3.
Printed Wiring Boards Main Section .........................
6
2.
EXPLODED VIEWS
2-1.
Front Section ...................................................................
7
2-2.
Rear Section ....................................................................
8
3.
ELECTRICAL PARTS LIST .................................. 9
(Fig. A)
3
SA-WMSP69
SECTION 1
DIAGRAMS
1-1. CIRCUIT BOARDS LOCATION
MAIN board
CONTROL board
INPUT board
POWER TRANS board
SWITCH board
4
SA-WMSP69
· NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
· A : B+ Line.
· B : B Line.
·Voltages are dc with respect to ground under no-signal
(detuned) 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
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is
printed in each block.)
For schematic diagrams:
Note:
· All capacitors are in µF 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.
· C : panel designation.
Note: The components identified by mark 0 or dotted line
with mark 0 are critical for safety.
Replace only with part number specified.
For printed wiring boards:
Note:
· X : parts extracted from the component side.
· Y : parts extracted from the conductor side.
·: Pattern from the side which enables seeing.
SA-WMSP69
55
SA-WMSP69
1-2. SCHEMATIC DIAGRAM -- MAIN SECTION --
JW403
JW404
JW1
C209
C211
C301
C401
C402
C409
C410
D305
R110
R202
R207
R209
R212
R213
R216
R304
R305
R306
R312
R314
R317
R500
R501
R502
R503
R504
R505
C304
C305
C306
C308
C313
C319
C320
C407
C408
C318
D303
D304
J101
Q306
Q308
Q311
R320
R322
R323
R326
R401
S901
R325
R321
C201
C203
C204
C205
C206
C302
C303
C405
C406
C501
C502
C601
C801
R327
R402
Q307
C307
C310
R307
R308
Q302
R309
R324
R310
C901
R403
R404
R206
R205
C101
R211
R210
R214
C207
C208
RV801
R217
C210
R301
R313
D301
D302
C403
C404
R101
R102
CN2
CN1
CN3
CN301
RY301
C503
R311
CN101
CN201
T1
Q502
SP901
R319
R318
R329
Q310
Q309
C309
IC202(1/2)
IC202(2/2)
D205
D206
C311
C312
IC203(1/2)
IC203(2/2)
CNP111
CNP801
Q301
Q304
Q303
Q305
R316
R328
Q504
Q503
Q501
D501
D401
R601
D402
D403
CN402
CNP401
F901
C2
CN4
D901
CN204