Onkyo A 8800 Service Manual

Page 1

ONKYO® SERVICE MANUAL

Integrated Stereo Amplifier
MODEL A-8800

UD

1 20V AC, 60Hz

UG

220V AC, SOHZ

UQ

240V AC , SOHZ

UW, UWX

l2OV/22OV AC, 50Hz/60Hz

SAFETY-RELATED COMPONENT WARNINGII

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

MAKE LEAKAGECURRENT OR RESISTANCE MEA-
SUREMENTS TO DETERMINE THAT EXPOSED PARTS
ARE ACCEPTABLY INSULATED FROM THE SUPPLY
CIRCUIT BEFORE RETURNING THE APPLIANCE TO
THE CUSTOMER.

SERIAL NO. 3309

TABLE OF CONTENTS

[iem Page
Specifications 2
Precautions 2
Adjustment procedures 3
Front panel facilities 5
IC block diagram 6
System connections 9
Packing procedures 10
Chassis exploded View 11
Exploded View parts list 13
Printed circuit board parts list 14
Printed circuit board View 19
Block diagram 23
Schematic diagram 27

Alllllll IIIIMPIINHIIS

ONKYO

Page 2

800

SPECIFICATIONS

Power Output:

Dynamic Power:
Total Harmonic Distortion:

Intermodulation Distortion:
Damping Factor:

Input Sensitivity
Impedance:

Output Level/Impedance:

Phono Overload:

Tone Control:
(Vol-20 dB)

High Cut:

Frequency Response:

100 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 distortion
310 watts 2 horns, 220 watts 4 ohms
0.008% at rated power

0008% at 1 watt output

0.005% at rated power

100 at 8 ohms

Phone (MM): 2.5 mV/50 kohms
Phono (MC): 160/.LV/220 ohms
CD DIRECT: 150 mV/SD kohms
TUNER: 150 mV/SO kohms
Tape Play: 150 mV/SU kohms
VCR Play: 150 mV/SO kohms
VDP Play: 150 mV/50 kohms
Tape Rec: 150 mV/1.5 kohms
(Phono)
Pre Out: 1 Wow ohms
Phono (MM): 200 mV RMS. at
1 kHz,
0.015% THD.
CONTRABASS:+10/+20 dB
(Muting: OFF/ON)
at 20 Hz
BASS: 110 dB at 70 Hz
TREBLE: i8 dB at 20 kHz
6 kHz (6 dB/Octave) (TREBLE
min.)
CD, Tuner: 250,000 Hz
(+0. -1 dB)

PRECAUTIONS

l. Replacing the fuses

RIAA Deviation:
Signal to Noise

Ratio (IHFA):

Muting (Vol - 20 dB):

D/A CONVERTER SECTION
Coaxial Input:

Output:
Optical Input:
Digital Sampling Frequency:
Frequency Response:
Total Harmonic Distortion:
Signal to Noise Ratio:
(IHF-A):
Dynamic Range
(IHF-A):
Max. Output Level:

GENERAL
Power Supply:

Dimensions:

Weight:

Phono (MM): 10.3 dB. 20 Hz -
20 kHz

Phono (MM): 94 dB (5.0 mV
input)

Phone (MC): 75 dB (015 mV
input)

CD: 107 dB

~15 dB

05 Vpep/7SQ

0.5 Pp/7551

Standard TOSLINK Tape

32,444, 48 kHz

2-20,000 Hzi0.2 dB
0.00157/0 at 1 kHz

110 dB

103 dB
2V r.m.s.

European models

(except U.K.):

USA & Canadian

models:

UK. & Australian

models: AC240 V, 50 Hz

Worldwide models: 120 and 220V
switchable.
50/60 HZ

435 (W)X164 (H)><392 (D) mm

I7-1/8X6-7/16>< 15-7/16

14.5 kg, 32.0 lbs.

AC220 V, 50 Hz

ACIZO V. 60 Hz

Specifications and features are subject to change without notice.

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

CIRCUIT NO. PART NO.

F921 252052
F922 252077 or
252077CC

DESCRIPTION
7A ST-o, Primary fuse (120V,

120V/220V model)

4AASE-EAK Primary fuse (220V, 240V. 120V/220V model)
4A-SE-EAK Primary fuse (220V, 240V, 120V/220V model)

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 IO M!) at 500Vt

Voltage Selector (Rear Panel)

Worldwide models are equipped with a voltae 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.

220V \, 120V 'L
at AC 120 V

.2-

220V L 120V '\,
at AC 220 V