Onkyo TX-7430 Service Manual

TX·7430
SER IAL NO. 32 58
ONKYO, ~ ,
SERVICE MANUAL
aUARTZ SYNTHESIZED
TUNER AMPLIFIER
MODEL TX-7430
-
SAFETY-RELATED COMPONENT WARNING!!
COMPONE NTS IDENTIFI ED BY MARK
L.
ON THE
SCHEMATIC DIAGRAM AND IN THE PARTS LIST ARE
CRITICAL FOR RISK OF F IRE AND ELECTRI C SHOCK.
REPLACE TH ESE COMPONENTS WITH ONKYO PARTS
WHOSE PARTS NUMBERS APPEAR AS SHOWN IN THIS
MANUAL.
MAKE LEAKAGE-CURR ENT OR RESISTANCE MEA­
SUREMENTS TO DETERMINE TH AT EXPOSED PARTS
ARE ACCEPTA BLY INSULATED FROM TH E SUPPLY
CIRCUIT BEFORE RETURNIN G THE APPLIANCE TO
TH E CUSTOMER.
TABLE OF CONTENTS
Specification s 2
Service procedur es 3
Exploded view _ . . . . . . . . . . . . . . 4
Parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Circuit descr iption s 6
Block diagram - Amp . section ­ . . . . . . . . . . . . . . . 12
- Tuner section - ., . . . . . . . . . . .. 13
Block diagram of IC 14
Packing view .. . . . . . . . . . . . . . . . . . . . . . . . . .. 17
Adjustmen t procedures _ _ . .. 18
Pc bca rd view/p arts list
Power amp . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2 1
FM /AM tun er 25
Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Pream p. . _ . . . . . . . . . 30
Remot e cuntrol . . . . . . . . . . . . . . . . . . . . . . . . 3 1
Switch
3 1
Sp ea ke
r 32
Volume 32
Schematic diagram
Amp. sect ion " 23
Tuner sect ion 27
Disassembli ng prccedu res 33
ONKYO®
AUDIO COMPONfNTS
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