Sony SA-WMSP68 User manual

1
SERVICE MANUAL
US Model
SA-WMSP68
SUB WOOFER
Ver 1.0 2004.07
Sony Corporation
Home Audio Company
Published by Sony Engineering Corporation
9-879-059-01
2004G04-1
© 2004.07
AUDIO POWER SPECIFICATIONS
POWER OUTPUTAND TOTAL HARMONIC
DISTORTION:
With 6 ohm loads, from 28 – 200 Hz; rated 100
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 120 W (6 ohms, 100 Hz,
THD 10%)
Input LINE IN (input pin jacks)
Power requirements 120 V AC, 60 Hz
Power consumption 95 W
Dimensions (w/h/d) (Approx.)
13 3/8 ×16 2/8 ×14 4/8
inches (337 ×410 ×365.5
mm) including front panel
Mass (Approx.) 28 lb 11 oz (13.0 kg)
Design and specifications are subject to change without
notice.
SPECIFICATIONS
•SA-WMSP68 is the subwoofer section
in HT-5800DP/6800DP/DDW960.

2
1.5 k Ω 0.15 µ FAC
voltmete
r
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
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 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 ex-
amples of a passive VOM that is suitable. Nearly all battery
operated digital multimeters that have a 2 VAC range are suit-
able. (See Fig. A)
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0OR DOTTED LINE
WITH MARK 0ON 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.
TABLE OF CONTENTS
1. DIAGRAMS
1-1. Note for Printed Wiring Boards and
Schematic Diagrams ............................................................ 3
1-2. Circuit Boards Location ...................................................... 3
1-3. Schematic Diagram – Main Section –................................. 5
1-4. Printed Wiring Boards – Main Section – ............................ 6
2. EXPLODEDVIEWS
2-1. Front Section ....................................................................... 7
2-2. Rear Section ........................................................................ 8
3. ELECTRICAL PARTS LIST........................................... 9
SA-WMSP68
•UNLEADED SOLDER
Boardsrequiringuse ofunleaded solderare printedwith thelead-
free mark (LF) indicating the solder contains no lead.
(Caution:Someprinted circuitboards maynot comeprinted with
the lead free mark due to their particular size.)
: LEAD FREE MARK
Unleaded solder has the following characteristics.
•Unleadedsoldermelts ata temperatureabout 40°Chigher 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.
(Fig. A)

3
SA-WMSP68
1-1. NOTE FOR PRINTEDWIRING BOARDS AND SCHEMATIC DIAGRAMS
1-2. CIRCUIT BOARDS LOCATION
SECTION 1
DIAGRAMS
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 Ωand 1/4W or less unless otherwise
specified.
•C: panel designation.
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.
•A: B+ Line.
•B: B– Line.
•Voltages are dc with respect to ground under no-signal
(detuned) conditions.
no mark : Power on
•Voltagesare taken with aVOM(Input impedance 10 MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
•Signal path.
F: AUDIO
Note: The components identified by mark 0or dotted line
with mark 0are critical for safety.
Replace only with part number specified.
MAIN board CONTROL board
POWER TRANS boar
d
POWER AMP board
SWITCH board

4
SA-WMSP68
IC301 STK404-130S (POWER AMP Board)
• IC BLOCK DIAGRAM
1 2 3 4 5 6 7 8 9 10 11 12 13

55
SA-WMSP68
1-3. SCHEMATIC DIAGRAM — MAIN SECTION — • Refer to page 4 for IC Block Diagram.
IC B/D
J201
C410
C411
S901
C901
R404
R405
C210
C316
C401
C404
C405
C414
C415
D402
D403
IC201(1/2)
IC201(2/2)
IC202(1/2)
IC202(2/2)
IC301
R213
R214
R304 R305
R306
R317
R318
R319
R209
R401
R508
C201
C306
C309
C312
C402
C403
C408
C409
D301
D302
D501
D601
Q503
Q504
R201
R202
R203 R204
R205
R206
R207
R208
R210 R211
R212
R301
R302
R303
R307
R308
R312
R313
R314
R315
R500
R501
R502
R503R504
R505
R507
R601
R309
C202
C203
C204
C206
C207
C208
C209
C304
C305 C307
C308 C310
C311
C313
C315
C412
C413
C416
C417
C501
C502
C601
C211 C212
CN202
RV201
CN201
C418
C406
C407
R402
R403
C503
C302
C301
CN301 CN302 C303
R310
R311
C314
CN401
CN901
Q302
G2
G1
RY501
Q502
Q501
C1 CN1
F901
T1
CN502
SP901
R316
CN501
D502
Q301
D404
D405
R506
D401
CN101 CN102
CN2
D701
D303

66
SA-WMSP68
1-4. PRINTEDWIRING BOARDS — MAIN SECTION — • Refer to page 3 for Circuit Boards Location. : Uses unleaded solder.
1
A
B
C
D
E
F
G
H
I
234567891011
CN302
R316
IC301
Q301
B
ECB
CE
R302 JW301
JW302
C306
R308
R309
C305
C309
R312
JW303
C312
R311
R310
C307
C308
C310
C311
JW306
C313
C301
C302
JW307
JW308
R315
C316
R317
C314
C315
Q302
R318
JW304
R313
R314
D303
R301
C304
C303
D301
D302
R303
R307
R306
R304
R305
TP301
R319
JW305
R201
C201
C202
R205
IC201
R208
14
85
14
85
R209
C204
C203
C208
C206
IC202
C207
C210
R214
C211
C209
C212
CN202
R204
R203
R202
J201
INPUT
RV201
VOLUME
R206
R207
R210
R211
R213
JW201
R212
JW202
JW203
CN101
SP901
SPEAKER
G1
D401
C402
C403
C404
C405
C406
C407
JW401
JW402
C408
C409
R402
R403
R500
R501 JW501
D501
C501
Q501
R502
R503
R504
R505
Q502
Q503
Q504
D402
D403
JW416
JW417
C410
C411
R405
R404
C601
D601
R601
CN401
CN201
G2
R401
C401
R506
21
1
6
6
1
1
4
1
4
(CHASSIS)
R507
R508
JW502
C503
C502
D502
B
C
E
BCE
ECB
BCE
RY501
C418
CN301
C414
C415
C416
C417
JW412
D404
D405
C412
C413
JW411
JW404
JW405
JW406
JW407
JW408
JW409
JW410
JW403
JW503
JW504
JW418
13 1
CN501
JW414
JW413
CN901
C901
1
2
1
2
CN502
D701
CNP102
CN1
21 21
T1
CN2
AC IN
C1
FH901
F901
FH951
D701
(POWER)
1-861-891-
1-861-892-
1-861-889-
1-861-890-
1-861-893-
S901
POWER
(CHASSIS)
D301 C-2
D302 C-2
D303 C-3
D401 D-10
D402 D-9
D403 D-9
D404 A-7
D405 A-7
D501 C-9
D502 C-7
D601 D-8
D701 G-5
IC201 F-2
IC202 G-2
IC301 D-3
Q301 B-2
Q302 B-4
Q501 C-8
Q502 C-8
Q503 C-8
Q504 C-8
•Semiconductor
Location
Ref.No. Location

7
SA-WMSP68
SECTION 2
EXPLODED VIEWS
Ref. No. Part No. Description Remark
2-1. FRONT SECTION
Ref. No. Part No. Description Remark
NOTE:
•The mechanical parts with no reference
number in the exploded views are not supplied.
•Items marked “*” are not stocked since
they are seldom required for routine service.
Some delay should be anticipated
when ordering these items.
•-XX and -X mean standardized parts, so
they may have some difference from the
original one.
•Color Indication of Appearance Parts
Example :
KNOB, BALANCE (WHITE) ... (RED)
Parts Color Cabinet’s Color
•Accessories are given in the last of this
parts list.
RR
14-253-282-01 KNOB, PUSH
24-253-279-01 WOOFER (RING)
34-253-280-01 GRILLE (FRAME)
SP901 1-825-768-11 SPEAKER (25cm) (WOOFER)
The components identified by
mark 0or dotted line with mark
0are critical for safety.
Replace only with part number
specified.
SP901
not supplied
not supplied
not supplied
not supplied
(SWITCH board)
1
2
3

8
SA-WMSP68
2-2. REAR SECTION
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
51 A-4713-864-A CABINET ASSY, SPEAKER
52 4-235-677-01 SCREW (4X20) (TYPE1), +BVTP
53 3-905-609-31 SCREW (TRANSISTOR)
*54 3-703-244-00 BUSHING (2104), CORD
055 1-783-820-11 CORD, POWER
56 A-4751-955-A MAIN BOARD, COMPLETE
57 4-999-482-81 KNOB (VOL)
58 A-4751-957-A POWER AMP BOARD, COMPLETE
59 4-253-276-01 REAR (COVER)
0F901 1-533-450-12 FUSE, GLASS TUBE (DIA.5) (2.5A/125V)
0T1 1-439-625-12 TRANSFORMER, POWER
#1 7-685-646-79 SCREW +BVTP 3X8 TYPE2 N-S
#2 7-685-881-09 SCREW +BVTT 4X8 (S)
F901
51
52
52
52
52
52
54
53
55
56
57
58
59
A
A
supplied with RV201
not supplied
(POWER TRANS board)
not supplied
(CONTROL board)
not supplied
T1
#2
#1
#1
#1
#1
#2
not supplied
52
The components identified by
mark 0or dotted line with mark.
0are critical for safety.
Replace only with part number
specified.

9
SA-WMSP68
SECTION 3
ELECTRICAL PARTS LIST
NOTE:
•Due to standardization, replacements in
the parts list may be different from the
parts specified in the diagrams or the
components used on the set.
•-XX and -X mean standardized parts, so
they may have some difference from the
original one.
•RESISTORS
All resistors are in ohms.
METAL:Metal-film resistor.
METAL OXIDE: Metal oxide-film resistor.
F:nonflammable
•Items marked “*” are not stocked since
they are seldom required for routine service.
Some delay should be anticipated
when ordering these items.
• SEMICONDUCTORS
In each case, u : µ, for example:
uA.. : µA.. uPA.. : µPA..
uPB.. : µPB.. uPC.. : µPC.. uPD.. : µPD..
•CAPACITORS
uF : µF
•COILS
uH : µH
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
CONTROL BOARD
***************
< CAPACITOR >
C201 1-128-813-11 CERAMIC 220PF 5% 50V
C202 1-126-964-11 ELECT 10uF 20% 50V
C203 1-136-165-00 FILM 0.1uF 5% 50V
C204 1-136-165-00 FILM 0.1uF 5% 50V
C206 1-131-696-11 FILM 0.22uF 5% 50V
C207 1-131-679-31 FILM 0.01uF 5% 50V
C208 1-126-964-11 ELECT 10uF 20% 50V
C209 1-126-964-11 ELECT 10uF 20% 50V
C210 1-128-813-11 CERAMIC 220PF 5% 50V
C211 1-126-967-11 ELECT 47uF 20% 50V
C212 1-126-967-11 ELECT 47uF 20% 50V
< CONNECTOR >
CN202 1-818-594-11 PIN, CONNECTOR 4P
< IC >
IC201 8-759-636-74 IC M5218AP-22
IC202 8-759-636-74 IC M5218AP-22
< JACK >
J201 1-815-025-11 JACK, PIN 1P (INPUT)
< RESISTOR >
R201 1-247-879-11 CARBON 100K 5% 1/4W
R202 1-247-831-11 CARBON 1K 5% 1/4W
R203 1-247-879-11 CARBON 100K 5% 1/4W
R204 1-249-429-11 CARBON 10K 5% 1/4W
R205 1-249-429-11 CARBON 10K 5% 1/4W
R206 1-247-879-11 CARBON 100K 5% 1/4W
R207 1-249-429-11 CARBON 10K 5% 1/4W
R208 1-247-895-00 CARBON 470K 5% 1/4W
R209 1-247-879-11 CARBON 100K 5% 1/4W
R210 1-247-863-11 CARBON 22K 5% 1/4W
R211 1-247-863-11 CARBON 22K 5% 1/4W
R212 1-247-887-00 CARBON 220K 5% 1/4W
R213 1-249-429-11 CARBON 10K 5% 1/4W
R214 1-247-879-11 CARBON 100K 5% 1/4W
< VARIABLE RESISTOR >
RV201 1-227-511-11 RES, VAR, CARBON 20K (VOLUME)
*************************************************************
A-4751-955-A MAIN BOARD, COMPLETE
*********************
< CAPACITOR >
C401 1-128-813-11 CERAMIC 220PF 5% 50V
C402 1-136-165-00 FILM 0.1uF 5% 50V
C403 1-136-165-00 FILM 0.1uF 5% 50V
C404 1-128-813-11 CERAMIC 220PF 5% 50V
C405 1-128-813-11 CERAMIC 220PF 5% 50V
C406 1-100-935-11 ELECT 4700uF 63V
C407 1-100-935-11 ELECT 4700uF 63V
C408 1-136-165-00 FILM 0.1uF 5% 50V
C409 1-136-165-00 FILM 0.1uF 5% 50V
C410 1-126-971-11 ELECT 470uF 20% 50V
C411 1-126-971-11 ELECT 470uF 20% 50V
C412 1-126-968-11 ELECT 100uF 20% 50V
C413 1-126-968-11 ELECT 100uF 20% 50V
C414 1-128-813-11 CERAMIC 220PF 5% 50V
C415 1-128-813-11 CERAMIC 220PF 5% 50V
C416 1-126-964-11 ELECT 10uF 20% 50V
C417 1-126-964-11 ELECT 10uF 20% 50V
C418 1-128-813-11 CERAMIC 220PF 5% 50V
C501 1-126-964-11 ELECT 10uF 20% 50V
C502 1-126-949-11 ELECT 220uF 20% 35V
C503 1-126-923-11 ELECT 220uF 20% 10V
C601 1-126-964-11 ELECT 10uF 20% 50V
< CONNECTOR >
CN101 1-785-104-11 PIN, CONNECTOR (3.96mm PITCH) 6P
CN201 1-818-594-11 PIN, CONNECTOR 4P
CN401 1-564-320-00 PIN, CONNECTOR (3.96mm PITCH) 2P
CN501 1-564-704-11 PIN, CONNECTOR (SMALL TYPE) 2P
< DIODE >
D401 8-719-302-38 DIODE RBV-602-01
D402 6-500-522-11 DIODE 10EDB40-TA2B5
D403 6-500-522-11 DIODE 10EDB40-TA2B5
D404 8-719-110-31 DIODE RD12ESB2
D405 8-719-110-31 DIODE RD12ESB2
D501 8-719-991-33 DIODE 1SS133T-77
CONTROL MAIN
The components identified by
mark 0or dotted line with mark.
0are critical for safety.
Replace only with part number
specified.
When indicating parts by reference
number, please include the board.

10
SA-WMSP68
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
D502 8-719-991-33 DIODE 1SS133T-77
D601 8-719-991-33 DIODE 1SS133T-77
< GROUND TERMINAL >
G1 1-537-738-21 TERMINAL, GROUND
G2 1-537-738-21 TERMINAL, GROUND
< TRANSISTOR >
Q501 8-729-119-78 TRANSISTOR 2SC2785-HFE
Q502 8-729-178-42 TRANSISTOR 2SC2784-F
Q503 8-729-119-78 TRANSISTOR 2SC2785-HFE
Q504 8-729-029-86 TRANSISTOR DTC124ESA
< RESISTOR >
R401 1-249-393-11 CARBON 10 5% 1/4W
0R402 1-219-153-11 FUSIBLE 10 5% 1/4W F
0R403 1-219-153-11 FUSIBLE 10 5% 1/4W F
0R404 1-215-892-11 METAL OXIDE 1K 5% 2W F
0R405 1-215-892-11 METAL OXIDE 1K 5% 2W F
R500 1-249-421-11 CARBON 2.2K 5% 1/4W
R501 1-249-429-11 CARBON 10K 5% 1/4W
R502 1-247-871-11 CARBON 47K 5% 1/4W
R503 1-247-879-11 CARBON 100K 5% 1/4W
R504 1-247-879-11 CARBON 100K 5% 1/4W
R505 1-247-863-11 CARBON 22K 5% 1/4W
R506 1-247-831-11 CARBON 1K 5% 1/4W
0R507 1-215-868-00 METAL OXIDE 680 5% 1W F
R508 1-247-863-11 CARBON 22K 5% 1/4W
0R601 1-215-920-11 METAL OXIDE 3.3K 5% 3W F
< RELAY >
RY501 1-515-920-11 RELAY (24V)
*************************************************************
A-4751-957-A POWER AMP BOARD, COMPLETE
***************************
< CAPACITOR >
C301 1-126-967-11 ELECT 47uF 20% 50V
C302 1-126-967-11 ELECT 47uF 20% 50V
C303 1-128-813-11 CERAMIC 220PF 5% 50V
C304 1-126-964-11 ELECT 10uF 20% 50V
C305 1-104-658-11 ELECT 100uF 20% 10V
C306 1-128-813-11 CERAMIC 220PF 5% 50V
C307 1-126-968-11 ELECT 100uF 20% 50V
C308 1-126-968-11 ELECT 100uF 20% 50V
C309 1-162-199-31 CERAMIC 10PF 5% 50V
C310 1-126-964-11 ELECT 10uF 20% 50V
C311 1-126-967-11 ELECT 47uF 20% 50V
C312 1-128-813-11 CERAMIC 220PF 5% 50V
C313 1-126-964-11 ELECT 10uF 20% 50V
C314 1-136-165-00 FILM 0.1uF 5% 50V
C315 1-136-165-00 FILM 0.1uF 5% 50V
C316 1-128-813-11 CERAMIC 220PF 5% 50V
< CONNECTOR >
CN302 1-818-593-11 PLUG, CONNECTOR 13P
< DIODE >
D301 8-719-991-33 DIODE 1SS133T-77
D302 8-719-991-33 DIODE 1SS133T-77
D303 8-719-991-33 DIODE 1SS133T-77
< IC >
IC301 6-600-091-01 IC STK404-130S
< TRANSISTOR >
Q301 8-729-119-78 TRANSISTOR 2SC2785-HFE
Q302 8-729-140-82 TRANSISTOR 2SA988-PAFAEA
< RESISTOR >
R301 1-247-847-11 CARBON 4.7K 5% 1/4W
R302 1-247-863-11 CARBON 22K 5% 1/4W
R303 1-247-847-11 CARBON 4.7K 5% 1/4W
R304 1-249-429-11 CARBON 10K 5% 1/4W
R305 1-247-863-11 CARBON 22K 5% 1/4W
R307 1-247-871-11 CARBON 47K 5% 1/4W
R308 1-249-413-11 CARBON 470 5% 1/4W
R309 1-249-411-11 CARBON 330 5% 1/4W
0R310 1-217-637-00 FUSIBLE 1 5% 1/4W F
0R311 1-215-886-11 METAL OXIDE 100 5% 2W F
R312 1-247-871-11 CARBON 47K 5% 1/4W
R313 1-247-847-11 CARBON 4.7K 5% 1/4W
R314 1-247-847-11 CARBON 4.7K 5% 1/4W
R315 1-249-393-11 CARBON 10 5% 1/4W
0R316 1-234-182-11 ENCAPSULATED COMPONENT 0.22X2 5W
R317 1-247-847-11 CARBON 4.7K 5% 1/4W
R318 1-247-850-11 CARBON 6.2K 5% 1/4W
R319 1-249-429-11 CARBON 10K 5% 1/4W
*************************************************************
POWER TRANS BOARD
*******************
1-533-217-41 HOLDER, FUSE
< CAPACITOR >
0C1 1-113-924-11 CERAMIC 0.0047uF 20% 250V
< CONNECTOR >
CN1 1-564-321-00 PIN, CONNECTOR (3.96mm PITCH) 2P
*CN2 1-580-230-11 PIN, CONNECTOR (PC BOARD) 2P
*************************************************************
SWITCH BOARD
*************
< CAPACITOR >
0C901 1-113-924-11 CERAMIC 0.0047uF 20% 250V
< CONNECTOR >
CN502 1-564-704-11 PIN, CONNECTOR (SMALL TYPE) 2P
*CN901 1-695-044-11 PIN, CONNECTOR (3.96mm PITCH) 2P
MAIN POWER AMP POWERTRANS SWITCH
The components identified by
mark 0or dotted line with mark.
0are critical for safety.
Replace only with part number
specified.

11
SA-WMSP68
Ref. No. Part No. Description Remark
< DIODE >
D701 6-500-991-01 LED TLPGE62T(SONY-M.F) (POWER)
< SWITCH >
0S901 1-554-920-11 SWITCH, PUSH (AC POWER) (1 KEY) (POWER)
*************************************************************
MISCELLANEOUS
***************
055 1-783-820-11 CORD, POWER
0F901 1-533-450-12 FUSE, GLASS TUBE (DIA.5) (2.5A/125V)
SP901 1-825-768-11 SPEAKER (25cm) (WOOFER)
0T1 1-439-625-12 TRANSFORMER, POWER
SWITCH
The components identified by
mark 0or dotted line with mark.
0are critical for safety.
Replace only with part number
specified.

12
SA-WMSP68
REVISION HISTORY
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Ver. Date Description of Revision
1.0 2004.07 New