Onkyo HTP-120, SKW-120, SKW-D-120, D-120, D-120C Service Manual

SERVICE MANUAL

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SERVICE MANUAL

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SKW-120/D-120C/D-120

SPEAKER SYSTEM

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HTP-120

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Ref. No. 3722

052002

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HTP-120

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SKW-120 (Subwoofer)

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.

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Black model

120V AC, 60HzBMDD

D-120 (Satellite)

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D-120C (Center)

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P ANEL VIEW

SKW-120/HTP-120

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Subwoofer SKW-120

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Front

Rear

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ABC

LINE

INPUT

RED : STANDBY
GREEN : ON

OUTPUT LEVEL

MAXMIN

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Satellite speakers D-120

(Front left/right, Surround left/right)

120mm
(4-3/4")

The badge can be rotated depending on the angle you position the
speaker.

Center speaker D-120C

130.5mm
(5-1/8")

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85mm (3-3/8")

265mm (10-7/16")

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Key hole

Screw hole
for a
speaker
stand

180mm (7-1/16")

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13942296513

To AC outlet

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.

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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

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SKW-120/HTP-120

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SPECIFICATIONS

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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)

Weight 14.3 kg 31.5 lbs
Others

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235 493 488 mm
9-1/4" 19-7/16" 19-3/16"

Auto standby on/off

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BCD

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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

Cabinet capacity 1.5 L
Dimensions (W H D) 265 130.5 79.5 mm

Weight 1.3 kg 2.9 lbs.
Others Magnetic shielding

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Center speaker D-120C

1.5-cm tweeter

10-7/16" 5-1/8" 3-1/8"

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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

13942296513

Cabinet capacity 0.8 L
Dimensions (W H D) 85 120 112 mm

Weight 0.7 kg 1.5 lbs.
Others

1.5-cm tweeter

3-3/8" 4-3/4" 4-7/16"
Magnetic shielding

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Accessories

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.)

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Cushioning pads (2 pcs.)
Instruction manual (this manual)

Specifications and appearance may subject to change for
improvement without prior notice.

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SERVICE NOTE

HTP-120

1. Replacing the fuses

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This symbol located near the fuses indicates that the fuse used is
fast operating type. For continued protection against fire hazard, re­place with same type fuse. For fuse rating refer to the marking adja­cent to the symbol.

Ce symbole indique que le fusible utlise est a rapide. Pour une pro­tection permanente, n'untiliser que fusibles de meme type. Ce darni­er est la qu le present symbol est appse.

TEL [phone] QQ 376315150 892498299

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 in­sulating-resistance tester between the plug of power supply cord and
screw on the back panel.
Specifications: 3.3M ohm+/-10% at 500V.

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AC Leakage Test

13942296513

Device

under

test

Test all
exposed metal
surfaces

Leakage
current
tester

Earth
ground

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Reading should
not be above

0.5mA

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HTP-120

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BLOCK DIAGRAM

SUB WOOFER AMP.

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NAETC-7457-1

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LED Red

LED Green

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NAAF-7456-1

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BCD E

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INPUT

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U2

P301

C301

AUTO_STANDBY

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ON/OFF

CIRCUIT

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OUTPUT

LEVEL

R303

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+24dB

Q301

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-6DB/OCT

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MUTE

CIRCUIT

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-2dB

LPF

600HZ

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THERMAL

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PROTECTION

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+28dB

POWER AMP

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CIRCUIT

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SPEAKER

6 ohm

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U1

NAAF-7455-1

+5.6V

C911

C912

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D933

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C931

D911

D_ARRAY

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+14.4V

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14.4V

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+B

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GND

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Q951

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Q952

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D931

D932

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T901

POWER TRANS

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F901

FUSE

NAPS-7458-1

AC IN

AC120VMDD

HTP-120

IDLING ADJUSTMENT

HTP-120

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Adjustment of Idling current

1). Cancel the Auto standby ON mode.
P604 is short.

2). Connect the DC volt meter to P531.

3). At the no load and no input signal condition.

4). Turn on the power switch.

TEL [phone] QQ 376315150 892498299

And adjust 0.25mV by trimmer (R544) on Main PC board.

5). After heat run for about 5 minutes, and set 4mV by R544 again.

TEL

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Printed circuit board view from component side

P604

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Q623

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D911

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C911

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NCAF-7455

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Trimmer

R544

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P623

Q951

Setting position of shipping

Output level ---------------------- MIN

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Q952

Q516

C912

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Q541

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Q514 Q513

P531

Q515

DC Volt meter

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