SKW-120 (Subwoofer)
D-120C (Center)
D-120 (Satellite)
SERVICE MANUAL
SERVICE MANUAL
Black model
120V AC, 60Hz
BMDD
Ref. No. 3722
052002
HTP-120
SKW-120/D-120C/D-120
SPEAKER SYSTEM
SAFETY-RELATED COMPONENT
WARNING!!
THE MARK
FOUND ON SOME COMPONENT
PARTS INDICATES THE CRITICAL FOR RISK OF
FIRE AND ELECTRIC SHOCK.
WHEN REPLACING, BE SURE TO USE PARTS OF
IDENTICAL DESIGNATION.
MAKE LEAKAGE-CURRENT OR RESISTANCE
MEASUREMENTS TO DETERMINE THAT EXPOSED
PARTS ARE ACCEPTABLY INSULATED FROM THE
SUPPLY CIRCUIT BEFORE RETURNING THE
APPLIANCE TO THE CUSTOMER.
HTP-120
SKW-120/HTP-120
PANEL VIEW
(Front left/right, Surround left/right)
The badge can be rotated depending on the angle you position the
speaker.
The badge can be rotated depending on the angle you position the
speaker.
The satellite speakers (D-120) and the center speaker (D-120C)
have colored labels on the backs for easy identification. Match
the color of the label with the corresponding speaker cable when
connecting the speakers. The DR-S2.2 SPEAKER terminals are
also colored to match the corresponding speaker cable.
Connect the cable with a colored line to the negative (-)
terminal.
The label colors and the corresponding speakers are as
follows:
Front left speaker and speaker cable:
White
Front right speaker and speaker cable:
Red
Center speaker and speaker cable:
Green
Surround left speaker and speaker cable:
Blue
Surround right speaker and speaker cable: Grey
A. LINE INPUT (input jack)
Connect this jack to the SUBWOOFER PREOUT jack of
the DR-S2.2.
B. Indicator
The indicator changes from red to green when the
subwoofer receives a signal.
C. OUTPUT LEVEL (Output level adjusting knob)
Use this knob to adjust the output level of the subwoofer.
Front
Rear
To AC outlet
AB
C
LINE
INPUT
OUTPUT LEVEL
MAX
MIN
RED : STANDBY
GREEN : ON
85mm (3-3/8")
120mm
(4-3/4")
265mm (10-7/16")
130.5mm
(5-1/8")
180mm (7-1/16")
Key hole
Screw hole
for a
speaker
stand
Key holes
Subwoofer SKW-120
Satellite speakers D-120
Center speaker D-120C
Subwoofer SKW-120
Type
Bass-reflex with built-in power amplifier
Use
For superbass-range reproduction
Frequency response
30-120 Hz (when used with the DR-S2.2)
Maximum output power
60 W
Dynamic output power
120 W
Input impedance
9.5 k ohm
Sensitivity
Line 65 mV
Speaker
20-cm woofer
Power supply
AC 120 V, 60 Hz
Power consumption
70 W (AC 120 V, 60 Hz)
Dimensions (W
H
D)
235
493
488 mm
9-1/4"
19-7/16"
19-3/16"
Weight
14.3 kg 31.5 lbs
Others
Auto standby on/off
Satellite speaker D-120
Type
2 way bass reflex
Frequency response
100 Hz-25 kHz
Maximum input power
40 W
Output sound pressure level
82 dB/W/m
Impedance
6 ohm
Speaker
8-cm woofer
1.5-cm tweeter
Cabinet capacity
0.8 L
Dimensions (W
H
D)
85
120
112 mm
3-3/8"
4-3/4"
4-7/16"
Weight
0.7 kg 1.5 lbs.
Others
Magnetic shielding
Center speaker D-120C
Type
2 way bass reflex
Frequency response
100 Hz-25 kHz
Maximum input power
50 W
Output sound pressure level
85 dB/W/m
Impedance
6 ohm
Speaker
8-cm woofer
2
1.5-cm tweeter
Cabinet capacity
1.5 L
Dimensions (W
H
D)
265
130.5
79.5 mm
10-7/16"
5-1/8"
3-1/8"
Weight
1.3 kg 2.9 lbs.
Others
Magnetic shielding
Audio connection cable (1 pc.)
3.5 m speaker cables (3 pcs.: white, red, green)
8 m speaker cables (2 pcs.: blue, grey)
Spacers for Subwoofer (4 pcs.)
Spacers for Satellite and Center speakers (black, 20 pcs.)
Horizontal mounting base (1 pc.)
Double-faced adhesive tapes (2 pcs.)
Cushioning pads (2 pcs.)
Instruction manual (this manual)
Specifications and appearance may subject to change for
improvement without prior notice.
Accessories
SKW-120/HTP-120
SPECIFICATIONS
A
1
2
3
4
5
BCD
HTP-120
SERVICE NOTE
1. Replacing the fuses
This symbol located near the fuses indicates that the fuse used is
fast operating type. For continued protection against fire hazard, re-
place with same type fuse. For fuse rating refer to the marking adja-
cent to the symbol.
Ce symbole indique que le fusible utlise est a rapide. Pour une pro-
tection permanente, n'untiliser que fusibles de meme type. Ce darni-
er est la qu le present symbol est appse.
CIRCUIT NO. PART NO.
DESCRIPTION
F901
252159 or
2A-UL/T-237 or
252253
2A-T/UL-ST2
2. Safety-check out
After correcting the original service problem, perform the following
safety check before releasing the set to the customer. Connect the in-
sulating-resistance tester between the plug of power supply cord and
screw on the back panel.
Specifications: 3.3M ohm+/-10% at 500V.
Leakage
current
tester
Reading should
not be above
0.5mA
Device
under
test
Test all
exposed metal
surfaces
Earth
ground
AC Leakage Test
F901
FUSE
THERMAL
PROTECTION
CIRCUIT
AUTO_STANDBY
ON/OFF
CIRCUIT
MUTE
CIRCUIT
LPF
-6DB/OCT
600HZ
-2dB
P301
D933
Q951
G I
O
Q952
G I
O
D932
D931
C301
- 14.4V
1
+14.4V
1
+5.6V
1
- B
1
GND
1
+B
1
C931
C912
C911
D911
D_ARRAY
T901
POWER TRANS
AC IN
R303
OUTPUT
LEVEL
POWER AMP
Q301
NAAF-7455-1
NAPS-7458-1
NAAF-7456-1
+28dB
6 ohm
SPEAKER
AC120V
MDD
+24dB
U2
U1
U3
U4
NAETC-7457-1
LED Red
LED Green
INPUT
SUB WOOFER AMP.
BLOCK DIAGRAM
A
1
2
3
4
BCD
E
HTP-120
HTP-120