Onkyo EQ-31 Service Manual

Stereo Graphic Equalizer
and Speaker Systems
MODEL EQ-31
MODEL PS-21/PS-31
Ref. No. 3454
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.
Black model
MW
240V AC, 50Hz
120V/220V AC, 50Hz/60Hz
TABLE OF CONTENTS
Specifications + +--+ S a c
each ela edi S a i s ea
dbs yod eis q
PrecautionS cst cr cc ttt teen eens 2
Block diagram «++ tte rte tres tees t tenets 3.
IC Block diagram: +++ +++ ee rttr eter ete etter ees 'ee
Front panel facilities
«ccs ccc tts
e h eal ale g
Chassis exploded view
-:-:- a dione dik Se
a aids, Caicglele 5 10
Packing parts FS
1]
Printed circuit board parts list: ++ +++ rts ttre tree 12
Printed circuit board views: +++ rrr t ttt terete 14
Schematic diagram +++ +++ +s scree ett t cette ee ee TS
Speaker system PSe2] cece ese
ele eee eee cee
ee 19
Speaker system PS-31 +++ ser ster ttre teeters:
20
ae aid