Harman kardon hk 490 i service manual

Page 2

hk490i

SPECIFICATIONS

0 FM SECTION Nominal Limit
Tuning Range 87.5 ~ 108.0MH2
50dB Quieting Sensitivity

Mono 15.2dBrS17dBf

Stereo 36.2d Bf S 38dBf
Usable Sensitivity 105(1st 12.5dBf
image Ratio 79.4dB 2 60dB
IF Rejection 76dB 2 70dB
Spurious Response Rejection 97.8dB 2 80dB
Capture Ratio 1.5dB S 2.5dB
Alternate Channel Selectivity 73.3dB Z 50dB
AM Rejection 52.4dB Z 45dB
Signal to Noise Ratio

Mono 82.5dBZ78dB

Stereo 74.5d B 2 72dB
Total Harmonic Distortion I65d Bf 1kHz Input)

Mono 0.08% S 0.2%

Stereo 0.1% S 0.3%
Stereo Separation at 1 kHz 53.5dB Z 45dB
0 AM SECTION
Tuning Range 520 ~1,710kHz
Usable Sensitivity 17pV
Selectivity 31 .3113 2 22dB
Signal to Noise Ratio 53:13 2 50dB
Image Rejection 33dB 2 28dB
IF Rejection 61dB_>_50dB

0 AUDIO SECTION
Usable Sensitivity

AUX/DAD I35mV 1 25mV

Phono 2.2mV i 0.2mV
Signal to Noise Ratio

AUX/DAD aasoe Zezda

Phono 80.5dB 2 mos
Channel Separation at 10kHz

AUX/DAD 49.7dBZ45dB

Phono 52.0dB 245w

LEAKAGE TEST

Nominal Limit

IM Distortion Ratio 0.1% S 0.25%
RMS Output Power
89, IkHz, THD 0.09% 36w2 30w
4Q,1kHz,THD 0.2% 49.6w24ow
Damping Factor at 1kHz 65 Z 45
Tone Control Characteristics
Bass at 50HZ
Boost 10dB i 2dB
Cut -1 Dd B 1 2d B
Treble at 10kHz
Boost IDdB i 2dB
Cut -10dB i ZdB
Loudness Control
at 10kHz 3dBt1dB
at 50HZ IOdB 1 3dB
Subsonic Control
at15HZ 3dB i ldB
High Cut Control
at 6kHz 3dB i 1dB
DC Output Voltage
L channel OmV i 60mV
R channel 0mV i 60mV
RIAA Equalization at Tape Out (20Hz/20kHz)

+1 on B +1 .OdB
Md B-0.5d ism-30' B-O.5dB

O DIMENTIONS (W x H x D) 178/8" x 5-1/4" x 14-3/8"
I443 x134 x 365 mm)

0 WEIGHT 17 lbs. 10 oz. (8.0 kg)

0 POWER SUPPLY AC120V, 60Hz

0 POWER CONSUMPTION 200W (220VA)

Specifications and components subject to change without notice.
Overall performance will be maintained or improved.

This specification is the target of servicing. But, there is a case
that the specification is not applicable to the measurement
condition and instrument.

Before returning the unit to the user, perform the following safety checks:

1. Inspect all lead dress to make certain
that leads are not pinched or that hard-
ware is not lodged between the chassis
and other metal parts in the unit.

2. Replace all protective devices such as To EACHEXPDSED
METAL SURFACE or

UNIT UNDER TEST

nonmetallic control knobs, insulating
fishpapers, cabinet backs, adjustment
and compartment covers or shields,
isolation resistorcapacity networks, me
.chanical insulators, etc.

3. Be sure that no shock hazard exists; check for leakage
current using Simpson Model 229 Leakage Tester,
standard equipment item No. 21641, RCA Model
WT540A or use alternate method as follows:

Plug the AC line cord directly into a 120-volt AC
receptacle (do not use an Isolation Transformer for
this test). Using two clip leads, connect a 1500 ohm,
10-watt resistor paralleled by a 0.15mf capacitor, in
series with all exposed metal cabinet parts and a
known earth ground, such as a water pipe or conduit.
Use a VTVM or VOM with 1000 ohms per volt, or
higher, sensitivity to measure the AC voltage drop
across the resistor. (See Diagram.) Move the resistor
connection to each exposed metal part having a
return path to the chassis (antenna, metal, cabinet,
screw heads, knobs and control shafts, escutcheon,
etc.) and measure the AC voltage drop across the
resistor. (This test should be performed with the
power switch in both the On and Off positions.)
' A reading of 0.35 volt RMS or more is excessive and
indicates a potential shock hazard which must be
corrected before returning the unit to the owner.

SIMPSON MODEL 229 ETC, FOR
LEAKAGE TEST

TO AC GROUND SUCH
AS WATER OR GAS PIPE,
ex CABLE, CONDUIT, ETC.

GROUND
LEAD

HIGH
VOLTAGE
OR + LEAD

fa
VTVM
-0 AC SCALE 0-

1.5KOHM
10W

WV

0.15 MF

TEST PROBE

T0 EXPOSED
META L PARTS

CONNECT TO KNOWN
EARTH GROUND