Published by Sony Engineering Corporation
Ver. 1.0 2005.05
AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTAL HARMONIC
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.
250 mm cone type
Acoustically loaded bass
160 W (6 ohms, 100 Hz,
LINE IN (input pin jacks)
120 V AC, 60 Hz
Dimensions (w/h/d) (Approx.)
× 410 × 366 mm
× 16 1/8 × 14 1/2 inches)
including front panel
13.0 kg (28 lb 11 oz)
Design and specifications are subject to change without
· SA-WMSP69 is the subwoofer section
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.
WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS
MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.
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 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
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.
To Exposed Metal
Parts on Set
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.
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
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
Circuit Boards Location ..................................................
Schematic Diagram Main Section .............................
Printed Wiring Boards Main Section .........................
Front Section ...................................................................
Rear Section ....................................................................
ELECTRICAL PARTS LIST .................................. 9
1-1. CIRCUIT BOARDS LOCATION
POWER TRANS board
· NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
· A : B+ Line.
· B : B Line.
·Voltages are dc with respect to ground under no-signal
no mark : Power on
·Voltages are taken with a VOM (Input impedance 10 M).
Voltage variations may be noted due to normal production
· Signal path.
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:
· All capacitors are in µF unless otherwise noted. (p: pF)
50 WV or less are not indicated except for electrolytics
· All resistors are in and 1/4 W or less unless otherwise
· 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:
· X : parts extracted from the component side.
· Y : parts extracted from the conductor side.
·: Pattern from the side which enables seeing.
1-2. SCHEMATIC DIAGRAM -- MAIN SECTION --