Onkyo TX 903 Service Manual

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Onkyo TX 903 Service Manual

Extracted text from Onkyo TX 903 Service Manual (Ocr-read)


Page 1

TX-901/TX-903

Ref. No. 3420

ONKYO SERVICE MANUAL

QUARTZ SYNTHESIZED
TUNER AMPLIFIER
MODEL TX-901
MODEL TX-903

Black and Silver models

BHMD, BHMDN

120V AC, 60Hz

BHMP, BI-IMPF, MP. MPF

230V AC, 50H:

BHMW

120V or 220V AC. 50/60I-Iz

BHMQA

240V AC, 50Hz

SAFETY-RELATED COMPONENT WARNING l!
COMPONENTS IDENTIFIED BY MARK A ON
THE SCHEMATIC DIAGRAM AND IN THE PARTS
LIST ARE CRITICAL FOR RISK OF FIRE AND
ELECTRIC SHOCK. REPLACE THESE COMF'O
NENTS WITH ONKYO PARTS WHOSE PART
NUMBERS APPEAR AS SHOWN IN THIS
MANUAL.

MAKE LEAKAGEiCURRENT OR RESISTANCE
MEASUREMENTS TO DETERMINE THAT EXPOSED
PARTS ARE ACCEPIABLY INSULATED FROM

THE SUPPLY CIRCUIT BEFORE RETURNING

THE APPLIANCE TO THE CUSTOMER.

ON KYO
Mllllll llllMPllllfllIS

TABLE OF CONTENTS

Specifications ..........

Service procedures-U
Exploded view Model TX-903 ------
Parts list Model TX.9()3 ............
Exploded view Model TX-901 ------
Parts list Model TX-901 ------------
Block diagram Model TX-903 ------
Block diagram Model TX-901
IC block diagram and descriptions --

Packing view .................

Adjustment procedures-
Printed circuit board view from bottom side ------------------- 23
Schematic diagram
Model "TX-903""
Model TX-901
Printed circuit boardparts list
Model TX-903~~
Model TX-901