Onkyo TX 904 Service Manual

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Onkyo TX 904 Service Manual

Extracted text from Onkyo TX 904 Service Manual (Ocr-read)


Page 1

ONKYO SERVICE MANUAL

TX~904/ 906

Ref. No. OM3399

QUARTZ SYNTHESIZED
TUNER AMPLIFIER

MODEL TX-904
MODEL TX-906

Black model

BHUD. BHUI)N. BHUDC

120V AC. (fllH7

BHUP

230V AC. SUHZ

BHUW

l2ll/ZZUV AC SO/GOHZ

BIIUQA

240V AC Slle

SAFETY-RELATED COMPONENT WARNING
COMPONENTS INDENTIFIED RV MARK A().\
THE SCHEMATIC DIAGRAM AND IN IIII:
PARTS LIST ARE CRITICAL FOR RISK ()l FIRIE
AND ELECTRIC SHOCK, REPLACI: 'IIII'SI:
COMPONENTS WITH ONKYO PARTS WHOSE
PART NUMBERS APPEAR AS SHOWN IN THIS
MANUAL,

MAKE LEAKAGE-CURRENT ()R RFSISTANCI"
MEASUREMENTS TO DETERMINE 'l HAT
EXPOSED PARTS ARE ACCEPTABLY
INSULATED FROM THE SUPPLY ('IRCUI'I'
BEFORE RETURNING THL APPLIANCE. 'I()
THE CUSTOMER

l ONKYot

l
l mum cumpnutms ,

-1H

TABLE OF CONTENTS

Specifications..
Exploded View Model TX-906,
Model TX-904
Model TX-906
Model TX-904 ......................
Block diagram Tuner section 120V model.

ax:-

Parts list

Other modelsm...
Model "IX-906.
Model TX-904.

Amplifier section

Mosooqm

Microprocessor descriptions
Connection diagram .....................................................
Terminal description .................

1C block diagrams and descriptions
Adjustment procedures ................
Printed circuit board views t
Schematic diagram ,,
Model "TX-906 120V model ..........................
Other models
120V model

Other models .......................................

Model TXu904

Printed circuit board M odcl TX -906 .......................
Model TX-904 ..

Service procedures,..

Packing procednrcs ........................................................... 74