Onkyo T 4500 Service Manual

Page 2

T-4500

SPECIFICATIONS

FM: AM:

Tuning Range: 87.50 7 18.00 MHZ (50/25kHz Tuning Range: European models:
steps) and/or88.00 7 18.00MH2 522 7 loIJkHz (9kI-Iz steps)
Usable Sensitivity: Mono: 10.3dBf, O.9p.V, IHF Canadian and USA models:
0.8pV DIN (75 ohms) 530 - 1710kIIz (IOkHz steps)
Stereo: 17.2dBf. 2.0pV. IHF Saudi Arabia &
201;.V DIN (75 ohms) Worldwide models:
50dB Quieting Sensitivity: Mono: 16.1dBf, 1.7pV (75 ohms) 531 7 l602kHz (9kHz steps)
Stereo: 36:1dBf. I7uV (75 ohms) Usable Sensitivity: ZSuV
Capture Ratio: 1:3dB (Wide) Image Rejection Ratio: 4(ldB
Image Rejection Ratio: 90dB IF Rejection Ratio: 4UdB

IF Rejection Ratio: 90dB Signal-to-Noise Ratio: 40dB

Signal-to-Noise Ratio: Mono: 78dB, lHF Total Harmonic Distortion: 0.7%
Stereo: 73dB. IHF Output Voltage: ISOmV
Selectivity: 60dB DIN (Narrow) General

AM Suppression Ratio: 50dB

Total Harmonic Distortion: Mono: U. l "/0 (Wide)

Stereo: 0.2% (Wide)

30 -15.000Hz+0.5-I.0dB
45dB at lkHz (Wide)

30dB at 70 - 10.000Hz (Wide)
0.75V

17.2dBf. 2.0ptV (7.50th)

Dimensions (WX H XD): 435 x 92 x 366mm

17-1/ X 3-5/8" X 1477/16"

4.0kg8.81bs:

0 AM loop antenna X1

0 FM T-shaped antenna XI

0 Connecting cable XI

0 RI remote control cablex 1

o 75/3OUohm antenna adapteer
(Except 220V model )

Weight:
Frequency Response: Supplied accessories:

Stereo Separation:
Output Voltage:
Muting Level:

Specifications and features are subject to change without
notice.

SERVICE PROCEDURES

1. Safety-check out turning the power switch on. This switch is set to 220V at

(Only USA, model)

After correcting the original service problem. perform the
following safety check before releasing the set to the
customer.

Connect the insulating7resistance tester between the plug
of power supply cord and chassis.

Specifications: 3.3Mohm i10% at 500V.

2. Memory preservation

This unit does not require memory preservation batteries.
A built-in memory power back-up system preserves
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 in order to
change the back-up 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 climate and placement of the unit.
0n 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 unit is exposed to very high humidity or used in
an area with an extremely humid climate.

3. Voltage Selector (Back Panel)
W models are equipped with a voltage selector to conform
with local power supplies. Be sure to set this switch to
match the voltage of the power supply in your area before

_2_

the factory. Voltage is changed by sliding the groove in the
switch with a screwdriver to the right or left. Confirm that
the switch has been moved all the way to the right or left
before turning the power switch on, Models without a
voltage selector can only be used in areas where the power
supply is the same as that of the unit.

4. Tuning Step Frequency Switch (Back Panel)
W models are equipped with a switch for the AM
(9kHz/10kHz) band. The switch should be set to the proper
steps for the radio broadcast frequencies in your area.

5. Changing the AM band step
With the exception of the models below: AM BAND STEP
selector switch is not provided.

MODEL BAND STEP .1777
UD ' 10kHz -» 9kHz Additional
UG/ UQ 9kHz 7* lOkHz Eliminated
1777
(it R713

0 702

DISPLAY PC BOARD