Onkyo A 8500 Service Manual

Page 1

ONKYO@ SERVICE MANUAL

Integrated Stereo Amplifier

MODEL A-8500

UD

120V AC. ()UHZ

UG

220V AC, 50I Iz

UQ

240V AC. SOHZ

U W

I20V/220V AC 50HZ/60HZ

SERIAL No3339

SAFETY-RELATED COMPONENT WARNINGI!

COMPONENTS IDENTIFIED BY MARK A ON THE
SCHEMATIC DIAGRAM AND IN THE PARTS LIST ARE
CRITICAL FOR RISK OF FIRE AND ELECTRIC SHOCKI
REPLACE THESE COMPONENTS WITH ONKYO PARTS
WHOSE PARTS NUMBERS APPEAR AS SHOWN IN THIS
MANUAL.

MAKE LEAKAGE-CURRENT OR RESISTANCE MEAV
SUREMENTS TO DETERMINE THAT EXPOSED PARTS
ARE ACCEPTABLY INSULATED FROM THE SUPPLY
CIRCUIT BEFORE RETURNING THE APPLIANCE TO
THE CUSTOMER,

TABLE OF CONTENTS

Specifications
Precautions

Block diagram

IC block diagram

Front panel facilities
Adjustment procedures
Chassis exploded view
Printed circuit board parts list
Parts list of packing
System connections
Printed circuit board view
Schematic diagram

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SPECIFICATIONS

Continuous Power Output:

Dynamic Power:
Tolal Harmonic Distortion

Inlermodulalvon Distortion:
Damping Factor:

input Sensitivity/
Impedance:

Output Level/Impedance:
Phono Overload:

Tone Control
(Vol -- 20GB):

High Cut:
Frequency Response:

RIAA Deviation:
Subsonic Filter
(MM suasomc,
MC SUBSONIC):
Signal to Noise
Ratio (IHF-A):

Muting:
Power Supply:

2 X 120 watts at 4 ohms, 1 kHz (DIN)

2 x 90 watts at 8 ohms. 1 kHz (DIN)

80 watts per channel, min, FIMS, at 8 ohms,
both channels driven Irorn 20 Hz to 20 kHz,
with no more than 0.008% Total harmonic
distortion:

210 watts at 2 ohms,

167 watts at 4 ohms

ODOBVa at rated power

0,008% at 1 watt output

0.005% at rated power

150 at B ohmslt kHz)

Phone (MM): 2.5 mV/SD kohms
Phono (MC): 150 )LV/130 ohms
CD: 150 mV/SO kohms
TUNEFI: 150 mV/30 kohms
Tape Play: 150 mV/SO kohms
Tape Rec: 150 mV/LO kohms (Phono)
Phono (MM): 180 mV HMS. at 1 kHz.
0015% THE
BASS: $8 :18 at 100 Hz
TREBLE: :6 dB at 10 kHz
6 kHz (6 dB/Ootave) (TREBLE min.)
CD, Tuner: 2 Hz -- 50 kHz
(+0. -l (13)
Phono (MM): :03 dB. 20 Hz ~ 20 kHz

20 Hz (*3 dB. 6 dB/Ootv)

Phono (MM): 93 dB (5.0 mV input)
Phone (MC): 74 as (0.5 mV input)
CD (DIRECT): 107 dB

-20 dB

European modelstACZZOV, 50 Hz

USA & Canadian models: AC 120V, 60 Hz

UK 8. Australia models: ACZAOV, 50 Hz

Worldwide modesl: A0120 and 220V
swttcnable, 50/50 Hz

435 x 157 x 391 mm

17-1/8" >< sans" X 15-3] "

12.5 kg. 27.6 lbs

Dimensions (Wx H x D):
Weight:

Specifications and Ieatures are subject to change without notice.

PRECAUTIONS

l. Replacing the fuses
For continued protection against risk fire, replace only with same type and same rating fuse.

CIRCUIT NO. PART NO. DESCRIPTION
F901 252051 6A ST-o, Primary fuse (120V. 120V/220V models)
F902 252076 or 3.15AVSEVEAK or
252076CC 3.15A-SE-EAK Primary {use (220V, 240V, lZOV/ZZOV models)

2. Insulation resistance mesurement (Only U.S.A. model)
Connect the insulating-resistance tester between the plug of power supply cable and the terminal GND on the
back panel.
Specifications; More than 10 M0 at 500V.

3. Voltage selector (rear panel)
Worldwide models are equipped with a voltage selector to conform with local power supplies. Be sure to set this
switch to match the voltage of the power supply in your area before turning the power switch on. Voltage is
changed by sliding the groove in the switch with a screwdriver to the right or left. Confirm that the switch has
been moved all the way to the right or left before turning the power switch on. Models without a voltage selector
can only be used in areas where the power supply is the same as that of the unit.

CID CUZI
220V~ 12OV~ 220V~ 120V~
at AC 120 V at AC 220 V

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