Onkyo T 4711 Service Manual

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Ref. No.3547

ONKYO SERVICE MANUAL

SYNTHESIZED
FM STEREO/AM TUNER
MODEL T-4711

European model(FM STEREO TUNER)

Black,Silver and Golden models

B UDN ,GUDN

120V, AC,6OHz

BUP,BUPB,BUPT,SUPT,SUPB,GUPT 230V AC,50Hz

BUWT,GUWT

l20/220V AC, 50/60Hz

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

MAKE LEAKAGE-CURRENT 0R RESISTANCE
MEASUREMENTS TO DETERMINE THAT EXPOSED
PARTS ARE ACCEPTABLY INSULATED FROM THE
SUPPLY CIRCUIT BEFORE RETURNING THE
APPLIANCE TO THE CUSTOMER.

TAB LE OF CONTENTS
Specifications...

Sends: procedums.
Block diagxam ,.
Exploded View...
Exploded view-pans 11le
Micmprocessox connection diagram
Micmpmcessm dmcfiplions
Adjustment procedures.
Primed circuit board view...

Main circuit pc board View

Other pc boards View...
Schematic diagram
Printed circuit boaxd~pans IisI.
IC block diagrams and descnplions.

Packing View ................................

[ ONKYO
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_1_

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711

SPECIFICATIONS

FM

Tuning Range: European and Worldwide models:
8750 - 108.00 MHz (50 kHz steps)

USA and Canadian models:
87.90 » 107.90 MHz (200 kHz steps)

Mono: 10.3 dBf0.9ttV. 75 Ohms IHF
0,8uV, 75 Ohms DIN

Stereo: 17.2 dBf 2.0pV, 75 Ohms IHF
20pV, 75 Ohms DIN

50 dB Quieting Senstivity: Mono: 16.1 (181' 1.7ttV 75 Ohms

Stereo: 36,1 dBf17ttV 75 Ohms

Usable Sensitivity:

Capture Ratio: 1.3 dB
Image Rejection Ratio: 100 dB
IF Rejection Ratio: 100 dB

Mono: 85 dB IHF
Stereo: 77 dB [HF
70 dB IHF (Narrow)
70 dB DIN (1300 kHz, 40 kHz dev.)
AM Suppression Ratio: 50 dB
Total Harmonic Distortion: Mono: 0.1%

Signal-to-Noise Ratio:

Selectivity:

0.3% (Normal 40 kHz dev.)
Stereo: 0.2%
0.7% (Nom'lal 40 kHz dev.)
Frequency Response: 30 - 15,000 Hz (+0.5, -1 .0 dB)
Stereo Separation: 45 dB at 1 kHz
33 dB at 70 - 10.000 Hz
Output Voltage: 1.0 V
Muting Level: 17.2 dBf 2.0 LN, 75 Ohms

SERVICE PROCEDURES

1. Safety-check out
After correcting the original service problem. perform the following
safety check before releasing the set to the customer.
Connect the insulating-resistance tester between the plug of power
supply cord and chassis.
Specifications: More than 10M!) at 500V.

2.Memory Preservation

This unit does not require memory preservation batteries. A Built
memory power back-up system proserves contents of the memory
during power failures and even when the unit is unplugged. The
unit must be plugged in and the power switch turned on and off
once 10 order to change the backup system, Note that since this is
not a permanent memory, the power switch must be turned on and
off a few times each month to keep the back-up system operative.
the period of time during which memory contents are preserved
after power has last been turned off varies depending on climat e
and placement of the unit.

On the average, memory contents are protected over a period of 3
to 4 weeks (a minimum of 2 weeks ) after the last time power has
been turned off. This period is shorter when the is exposed to very
high humidity or used in an area with an extremely humid climate.

AM
Tuning Range: USA and Canadian models:

530 - 1710 kHz (10 kHz steps)
Asian models:

522 - 1611 kHz (9 kHz steps)
Worldwide models:

531 - 1602 kHz (9 kHz steps)

530 - 1710 kHz (10 kHz steps)

Usable Sensitivity: 250. V
Image Rejection Ratio: 40 dB
IF Rejection Ratio: 40 dB
Signal-to- Noise Ratio: 40 dB

Total Harmonic Di stonion:().8%

Output Voltage: 250 mV
General
Power Supply: USA and Canadian models:

AC 120V, 60Hz
European models:
AC 230V. SOHZ
Worldwide models:
AC 120V and 220 . 230V
switchable, 60/50 Hz
Dimensions (W X H X D): 435 X 91 X 373 mm
17-1/8" X 3-9/16" X 14-11/16"
Mass: 4.9 kg, 10.8 lbs.

Specifications and features are subject to change without notice.

3. Changing the FM/AM band step
(Except European model)
When change the band step, refer the below table.

Band step R704 R705
Other from USA 2.7k 390
USA from other 5.6k 3.3k