Onkyo TX 38 Service Manual

Page 1

SERIAL NO 3223

WNKYO SERVICE MANUAL

QUARTZ SYNTHESIZED
TUNER AMPLIFIER
MODEL TX-38

as: m

Black model
BUD, BUDN 1 120V AC. 60Hz
BUC 220V AC. 50Hz
BUQA 240V AC. 50Hz

SAFETY-RELATED COMPONENT WARNINGH
COMPONENTS IDENTIFIED BY MARK A ON
THE SCHEMATIC DIAGRAM AND IN THE PARTS
LIST ARE CRITICAL FOR RISK OF FIRE AND
ELECTRIC SHOCK. REPLACE TIIESE COMPO
NENTS WITH ONKYO PARTS WHOSE PART
NUMBERS APPEAR AS SHOWN IN THIS
MANUAL,

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.

ONKYO
Alllllll BflMPflNENIS

TABLE OF CONTENTS

Specifications ---------------
Service procedures ------------ . -

Exploded View ..................... 4
Pans list ....................... 5
Block diagram 'Tuner section- ------------ 6
Block diagram *Amplifier section ------------ 8
Circuit description ~~~~~~~~~~~~~~~~~~~ 9
Adjustment procedures ---------------- 15

Schematic diagram

Tuner section *IZOV model ---------- 19
-220V modeI ---------- 23

Amp. section *120V modelv ---------- 27
220V model< --------- 31

Block diagram of IC -------------- 33
Packing VIEW ----------------- 34