Onkyo A 807 Service Manual

Page 1

A-807

Ref. No. 3405

ONKYO® SERVICE MANUAL

Integrated Stereo Amplifier
MODEL A-807

Black and Silver models

UDV W I 1231:9693,

0H

SAFETY~RELATED COMPONENT WARNING?!

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

MAKE LEAKAGE-CURRENT OR RESISTANCE MEASURE-
MENTS TO DETERMINE THAT EXPOSED PARTS ARE AC
CEPTABLY INSULATED FROM THE SUPPLY CIRCUIT
BEFORE RETURNING THE APPLIANCE TO THE CUS»
TOMER.

Adjustment procedures

IC bIock diagram . . . . ............................... 4
Block diagram , . . . ........ 7
Chassis exploded View i .i. ......... 9
Printed cimuil board parts list ...... , 12
Printed circuit board View ......... . l6
Schematic diagram ............ V 21
Front panel factlities ................. t 26
System connections .................. i i i 26
Packing part list ...................................... 27

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ONKYO

Alllllll cumpnurms

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Page 2

SPECIFICATIONS

Power Output:

Dynamic Power:

Total Harmonic Distortion

80 watts per channel, min RMS. at 8 ohms.
both channels driven from 20 Hz to 20 kHz,
with no more than 0.008% Total harmonic
dlstortion.

210 watts at 2 ohms

167 watts at 4 ohms

115 watts at 8 ohms

0.003% at rated power

0.008% at 1 watt output

lntermodulation Distortion: 0.005% at rated power

Damping Factor:
Input Sensitivitv/
Impedance:

0 utput Level/Impedance:
Phono Overload:

Tone Control
(Vol *20 115):

High Cut:
Frequency Response:

RIAA Deviation:
subsonic Filter:
Signal to Noise
Ratio (IHF-A):

Attenuator:
Mutlng:
Power Supply:

150 at 8 ohms (1 kHz)
Phono (MM): 2.5 mV/50 kohms
Phone (MC): 180 (AV/130 ohms

CD: 150 mV/30 kohms

TUNER: 150 mV/30 kohms

Tape Play: 150 mV/30 kahms

Tape Rec: l50 rnV/1.0 kohms (Phono)

Phono (MM): 180 mV RMS. at 1 kHz,
0.015% THD.

BASS: 13 dB at 100 Hz

TREBLE: 18 dB at 10 kHz

6 kHz (6 dB/Oclave) (TREBLE min.)
CD, Tuner: 2 Hz -50 kHz
(to) 41 dB)
Phono (MM): 10.3 dB, 20 Hz -20 kHl
20Hz (-3dB, SdB/Oct)
Phono (MM): 93 all (5.0 mV input)
Phono (MC): 74 dB (05 mV input)
CD (DIRECT): 107 dB
~20 dB
- 00
European models: AC230V, 50 Hz
U,S.A 8i Canadian models: ACIZOV, 60 Hz
UK 8 Australia models: AC240V. 50 Hz
Worldwide models: AC1 20 and 220V
switchable, 50/60 Hz

Dimensions (W x H X D):455 x 170 x 1320 mm

Weight:

17-15/16" )1 6711/16" X 16-9/16
15.5 kg, 34.2 lbs

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 N0. PART NO. DESCRIPTION,

F90I 25205] 6A 5115, Primary {use t [20% HOV/220V model),
F90I 252075 2 SA»SE7EAK. Primary ruse (250V model),

F902 252076

.N

Insulation resistance mesurement (Only U.S.A. model)

3.15AVSEvEAKV Primary fuse (230V. 240V. IZOV/ZZOV models).

Connect the insulating-resistance tester between the plug of power supply cable and the terminal GND on the back panel.
Specification; More than IOMQ 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
ofthe 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 up or down, Confirm that the switch has been moved all the way to the up or down before turning the power switch on. Models without
a voltge selector can only be used in areas where the power supply is the same as that of the unit.

220V ~
\

at AC 220V

120V ~

220V ~

at AC 120V

120V ~