Onkyo TX 903 Service Manual
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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