Onkyo PA 33 Service Manual
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Page 1
PA- 33
SERIAL NO. 3138
ONKYOG SERVICE MANUAL
INTEGRATED
STEREO AMPLIFIER
MODEL PA-33
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TABLE OF CONTENTS
Item Page
Specifications 2
Block diagram 2
Precautions 4
Exploded view 5
Component location 6
Exploded View of volume control and
indicator section
Memory board mounting section 8
Operation description 9
Printed circuit board view from component side 11
Schematic diagram 13
Printed circuit board-parts list 15
Packing procedures 16
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Page 3
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NOTE: A ....... Red wire
CA ..... Black wire
E ....... Blue wire
CO ..... Orange wire
PRECAUTIONS
1. Replacing the fuses
For continued protection against fire hazard, replace only with same type and same rating fuse.
CIRCUIT NO. PARTS NO. DESCRIPTION REMARKS
F901 252049 4A(ST-6), AC fuse lZOVmodel
F501, F601 252059 4A(SS -2), Speaker protection 120V model
fuse
F901 252074 2A-SE-EAK, AC fuse 220V model
F501, F601 252076 3.15A-SE-EAK, Speaker 220V model
protection fuse
F901 252014 4A-T, AC fuse 120V/220V model
F902 252074 lA-SE-EAK, AC fuse 120V/220V model
F501, F601 252014 4A-T, Speaker protection fuse 120V/220V model
F901 252002 2A-T, AC fuse 240V model
F501, F601 252014 4A-T, Speaker protection fuse 240V model
2. Voltage Selector (rear panel)
Some 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 right or left position. Confirm that the switch has been
moved all the way to the right or left 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.
E
.31
220V ~ 1 20V ~
at AC 120V
220V ~120V ~
at AC 220V
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