Onkyo TX-7230 Service Manual

SERVICE
MANUAL
QUARTZ
SYNTHESIZED
|
TUNER
AMPLIFIER
MODEL
TX~7230
Silver and b:
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK Z\ ON
THE SCHEMATIC DIAGRAM AND IN THE PARTS
LIST ARE CRITICAL FOR RiSK OF FIRE AND
ELECTRIC SHOCK. REPLACE THESE COMPO-
NENTS WITH ONKYO PARTS WHOSE PARTS
NUMBERS APPEAR AS SHOWN IN THIS MANUAL.
MAKE LEAKAGE-CURRENT OR RESISTANCE
MEASUREMENTS TO DETERMINE THAT EX-
POSED PARTS ARE ACCEPTABLY INSULATED
FROM THE SUPPLY CIRCUIT BEFORE RETURN.
ING THE APPLIANCE TO THE CUSTOMER.
i
mocels
TABLE OF CONTENTS
Spectiications . 00 ce ee oe 2
Service procédures... 2s ee poe ee 3
Biock diagrani
Amplifier section. «2. ee eee 4
Power supply section. 2... 0. ee 4
Dynaznic bass ciretitusc0.. oo oe oe 4
Pune? section) oe ee 5
Exploded view. 2.22 ee ee 6
Paris list. 0 ee ee, Gy ees 7
Circuit description. oe ee oe 8
Adjustment procedures... 65. oe 13
Pcb view/list
Tuner section 2 0. ee ee ee, 15
Digital section. 6. ee bye ee 17
Aimplifier section... oe 21
Control section... ee ee 25
Senematic diagram
Jumer section 3. 2k eee oe 19
AMD, section 4. lee ee ee, 2.
Block diaprani of 1Co 0 ee, head
Packing View. 2. 0 See ee ee. 2

Onkyo TX-7230 Specifications

General

Amplifier Type	Stereo Receiver
Number of Channels	2
Frequency Response	10 Hz - 100 kHz (+1 dB, -3 dB)
Total Harmonic Distortion	0.08%
Damping factor	60
Input Sensitivity (Line)	150 mV
Input Sensitivity (MM)	2.5 mV
Signal-to-Noise Ratio (Line)	100 dB
Signal to noise ratio (Line)	100 dB
Speaker Impedance	4-16 ohms
Tuner Type	FM/AM
Weight	7.3 kg
Tuning range	FM, MW
Signal to noise ratio (MM)	80 dB
Speaker load impedance	4 - 16 ohms
FM Sensitivity	1.0 μV (IHF)