Onkyo Integra M 508 Service Manual

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SERIAL N0. 3232

ONKYO SERVICE MANUAL

Stereo Power Amplifier
MODEL M-508

77w W 7 7 iiiifob. («)in 7
T U6 7 T vzzov AC7. fix

UQ - 7 240v AC, SOHz HT

uw 136?; 220V AC, 50/60Hz

SAFETY-RELATED COMPONENT WARNING

COMPONENTS IDENTIFIED BY MARK L1 ON THE
SCHEMATIC DIAGRAM AND IN THE PARTS LIST
ARE CRITICAL 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 MEA-
SUREMENTS TO DETERMINE THAT EXPOSED PARTS
ARE ACCEPTABLY INSULATED FROM THE SUPPLY
CIRCUIT BEFORE RETURNING THE APPLIANCE
TO THE CUSTOMER.

TABLE OF CONTENTS

Specifications ............................. 2
Precautions .............................. 2
Block diagram ............................. 3
Adjustment procedures ....................... 4
Front paneI facilities ........................ 4
Packing procedures ......................... 5
Chassis~exploded View ....................... 6
Printed board parts list ....................... 8
System connections ......................... I 1
IC Block diagram ........................... [2
Schematic diagram (UD) . . .- .................. 13

(U6) ..................... I7

(UW) ..................... 21
Printed circuit board View. . . .................. 15

ON KYO®
AIIIIIII IIIIMPIIIIIIIIS

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SPECIFICATIONS

Music Power Output: 2 x 450 watts at 4 oluns, IkI-Iz (DIN) 2 x 260 watts at 8 ohms, lkHz (DIN)
Continuous Power Output; 2 x 315 watts at 4 ohms, lkHz (DIN) 2 x 215 watts at 8 ohms, lkI-Iz (DIN)
200 watts per channel, min. RMS, at 8 ohms, both channels driven, from 20 Hz to 20 kHz,
with no more than 0.003% THD

Total harmonic distortion: 0.003% at rated power
0.003% at 1 watt output

Intermodulation distortion: 000370 at rated power

Frequency response: +0, -1.5 dB at le to lOOkHz

Input sensitivity: 1.0V

Input impedance: 20kohms

Damping factor: 140 (8 oluns, IkHz)

S/N ratio: 120 dB (IHFA, shorted)

Outputs: SPEAKERS 1 8c 2, AC OUTLET (I20V models only)

Inputs: INPUT (VARIABLE. DIRECT)

Power Supply: European models: AC 220V, 50Hz
Canadian models: AC 120V, 60Hz
British and Australian models: AC 240V, 50Hz
Worldwide models: AC 120V, 60Hz
(Switchable): AC 220V, 50Hz

Dimensions: 465(W) x 185(H) x 426(D) mm
18 5/16" x 7 9/32" x16 25/32"

Weight: 25 kg, (55.1 lbs.)

Specifications and features 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

F801, F802 252052 7A (ST-6), Primary fuse (120V, 120V/ 220V model)

F803, F804 252077 4A-SE-EAK, Primary [use (220V, l20V/220V, 240V model)
F702 252044 2A (ST76), Secondary fuse (120V, 120Vl220V model)

F702 252074 2A-SE-EAK, Secondary fuse (220V, 240V model)

2. Replacing the lamp
This unit uses the lamp listed below.

CIRCUIT N0, PARTS NO. DESCRIPTION

PL88I, P1382 210191 PL14V ISOmA (Green)
PL883, PLB84

PL885, PL886 210192 PL14V 150mA (Orange)
PL887, P1888

3. 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 M52 at 500V.

4. 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 or similar instrument to the up or down position. Confirm that the switch
has been moved all the way to the up or down before turning the power switch on. If there is no voltage selector switch
on the unit you have purchased, it can only be used in areas where the power supply voltage is the same as that of the

unit.
220v 120v 220v 120v
at AC 120v at Ac 220v

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