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US Model

Canadian Model

AEP Model

UK Model

E Model

Australian Model

2004G16-1
© 2004.07

• SA-WMSP76 is the sub woofer section in

HT-DDW755/760 and HT-4800DP.

Speaker system

Active subwoofer,
magnetically shielded

Speaker unit

200 mm cone type

Enclosure type

Acoustically loaded bass
reflex

RMS output:

100 W (6 ohms, 100 Hz,
THD 10%)

Input

LINE IN (input pin jacks)

Power requirements

US, CA

120 V AC, 60 Hz

CEL, CEK, MY, SP, AU

230 V AC, 50/60 Hz

Power consumption

75 W

Dimensions (w/h/d) (Approx.)

270 

×

 325 

×

 398 mm

(10 3/4 

×

 12 7/8 

×

 15 3/4

inches) including front
panel

Mass (Approx.)

9.0 kg (19 lb 14oz)

• Abbreviation

AU

: Australian model

CA

: Canadian model

CEK : UK model
CEL : AEP model
MY : Malaysia model
SP

: Singapore model

2

After correcting the original service problem, perform the
following safety checks 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 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 2V AC range are suitable. (See
Fig. A)

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.)

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.

0.15

µ

F

To Exposed Metal
Parts on Set

1.5k

Ω

AC
voltmeter
(0.75V)

Earth Ground

0

0

0

3

3

•

X

: parts extracted from the component side.

•

Y

: parts extracted from the conductor side.

•

a

: Through hole

•

: Pattern from the side which enables seeing.

•

Indication of transistor

Caution:
Pattern face side: Parts on the pattern face side seen from
(Side B)

the pattern face are indicated.

Parts face side:

Parts on the parts face side seen from

(Side A)

the parts face are indicated.

•

All capacitors are in 

µ

F unless otherwise noted.  p: 

µµ

F 50 WV

or less are not indicated except for electrolytics and tantalums.

•

2

: nonflammable resistor.

•

5

: fusible resistor.

•

All resistors are in 

Ω

 and 

1

/

4 

W or less unless otherwise speci-

fied.

•

C

: panel designation.

•

A

: B+ Line.

•

B

: B– Line.

•

Voltages are dc with respect to ground under no-signal condi-
tions.
no mark : Power on

•

Voltages are taken with a VOM (Input impedance 10M

Ω

).

Voltage variations may be noted due to normal preduction tol-
erances.

•

Signal path.

F

: AUDIO

• Abbreviation

CND

: Canadian model.

B

These are omitted.

C

E

SWITCH BOARD

CONTROL BOARD

POWER TRANS BOARD

INPUT(CONTROL) BOARD

MAIN BOARD

The components identified by
mark 

0

or dotted line with mark

0

 are critical for safety.

Replace only with part number
specified.

Les composants identifiés par
une marque 

0

sont critiques

pour la sécurité.
Ne les remplacer que par une
pièce portant le numéro spécifié.

4

4

INPUT

SP1

5

4

1

8

5

8

(11)

11

(

)

3

1

2

A

B

C

D

E

F

G

3

4

5

6

7

8

1-686-985-

(US,CND)

D205

C-3

D206

C-3

D301

E-4

D302

E-4

D304

D-2

D401

F-2

D501

E-2

D502

E-4

D602

C-2

IC202

C-3

IC203

B-3

IC301

D-4

Q501

D-2

Q502

D-2

Q503

D-2

Q504

D-2

Q505

E-4