Harman kardon hk 870 service manual

Page 2

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SPECIFICATIONS
Nominal Limit

Input Sensitivity 1.0V i 0.2V
Input Impedance at IkHz 22kSZ i ZkQ
Frequency Response 0.1HZ N 170kHZZ 150kHz
Signal to Noise Ratio 98dB 2 90dB
Channel Separation at 10kHz 730132 70dB
Total Harmonic Distortion _

20Hz 0.017% S 0.03%

1kHz 0.016% 30.03%

20kHz 0.021% 3 0.035%
RMS Output Power

39, mm ~ 20kHz, THD 0.06% 110w2100w

4Q,1kHz,THD 0.06% 160W2150W

Power Bandwidth /2 rated power) 20Hz ~ 80kHz 2 70kHz
IM Distortion Ratio at 1w 0.05%: 0.07%
Damping Factor at IkHz 1252 100

LEAKAGE TEST

Nominal Limit

Slew Rate 160V 415 2.130V/ps

DC Balance OmV i 50mV

Idle Current 75mA t 5mA

Current Capability 60A 2 53A l
Dimensions (W x H x D) 443 x 135 x 386 mm

Weight 12.3 kg

Power Supply AC 120V, GOHZ

Power Consumption 550W

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

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

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

1. Inspect all lead dress to make cer-
tain that leads are not pinched or
that hardware is not lodged be
tween the chassis and other metal
parts in the unit.

2. Be sure that any protective devices
such as nonmetallic control knobs,
insulating fishpapers, cabinet backs,
adjustment and compartment cov-
ers or shields, isolation resistor-
capacity networks, mechanical in-
sulators, etc. which were removed
for servicing are properly reinstalled.

3. Be sure that no shook 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~v0|t 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.

TO EACH EXPOSED

UNIT UNDER TEST

METAL SURFACE OF

SIMPSON MODEL 229 ETC. FOR
LEAKAGE TEST

TO AC GFIOUNDSUCH
As WATER OR GAS PIPE,
8X CABLE, CONDUIT, ETC.

GROUND
LEAD

HIGH
VOLTAGE
OR + LEAD

é
VTVM I
-OAC SCALE 0-

15KOHM
10W

W),

..__.||_

0.15 MF

TEST PROBE

TO EXPOSED
METAL PARTS

CONNECT TO KNOWN
EARTH GROUND