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2007E04-1
© 2007.05

E Model

• SA-WG99V is the sub woofer section

in MHC-GNZ444D.

Speaker system

Bass-reflex type

Speaker units

Woofer: 20 cm, cone type,
magnetically shielded

Power consumption

110 W

Nominal impedance

6 

Ω

Dimensions (w/h/d)

Approx. 280 

× 306 × 405 mm

Mass

Approx. 9.1 kg

2

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)

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 viscou-s (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.

3

Note on Printed Wiring Boards:
• X : Parts extracted from the component side.
•         a

: Through hole.

•

:

 

Pattern from the side which enables seeing.

Note on Schematic Diagrams:
• All capacitors are in µF 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 Ω 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 MΩ).

Voltage variations may be noted due to normal produc-
tion tolerances.

• Signal path.

d

: AUDIO

Note: The components identified by mark 0 or dotted line

with mark 0 are critical for safety.
Replace only with part number specified.

PT board 

MAIN board 

LED VOL board

POWER SWITCH board

INPUT board

4

• IC Block Diagram