Harman kardon hk 6250 service manual

Page 1

The Harman Kardon

Madel HK6250 ManualiszA
INTEGRATED AMPLIFIER

Teemficeefl Mammal

harman kaidon HKI-m

\{

« 05?.st

The following marks found in the parts list of this manual
identify the models as follows.

: North America area model Black version

: German model

: German model Black version

: Australian model Black version

: International model Black version

:AsialOceania model Black version

@@®@@%

CONTENTS

GENERAL UNIT PARTS LIST
GENERAL UNIT
P. C. BOARDS ......
ELECTRICAL PART .
SCHEMATIC DIAGRAMS ..
WIRING DIAGRAM ............

SPECIFICATIONS ..
LEAKAGE TEST
CONTROL AND FUNCTIONS.
DISASSEMBLY PROCEDURES ..
POWER CORD REPLACEMENT.
BLOCK DIAGRAM ...................
ALIGNMENT PROCEDURES ..

O'lU'l-lh-wa-k)

harman/kardon

Pans and Service Office
240 Crossways Park West,Woodbury,N.Y. 11797
1112-0170A152 P-1291121500 Printed in Japan

Page 2

W

O
a
Q
a:
::

SPECIFICATIONS

Nominal Limit

Continuous Average Power

FTC, both channels drive,
20 - 20.000Hz

45 Watts per channel
@ less than 0.1% THD into

8 Ohms, 45 Watts per channel

@ less than 0.3% THD into
4 Ohms
High Instantaneous Current
Capability (HCC) 32 g 25A

Half Power Bandwidth (8 Ohms) 10 Hz ~ 70 kHz
* Frequency Responce
(at -3 dB Down) 1 Hz ~ 150 kHz

Input Sensitivity (at 45W Output)
Tuner, CD, Video 135 mV 1 25mV
Phono 2.2 mV 1 0.2 mV
Signal to Noise Ratio

Tuner, CD, Video 84 dB ; 77 dB

Phono 80 ng73 dB
Channel Separation at 10 kHz

Tuner 55 dB ; 45 dB

Phono 57 dB ; 45 dB
IM Distortion Ratio 0.05% g 0.1%
Damping Factor 64 g 50

Tone Control Characteristics
Bass at 50 Hz/100 Hz

Boost $10 (I31 2 dB

Cut :10 dB i 2 dB
Treble at 10 kHz/30 kHz

Boost _ i10dBi2 dB

Cut , i10det2 dB

Nominal Limit

Loudness Control (with Volume
Control at -40 dB)

atIOkHz 3dB:i:1 dB
at50 Hz 10dB:l:2 dB
DC Output Voltage
L channel 0 th 60 mV
R channel 0 mVi 60 mV

RIAA Equalization (at Tape Out)
(20 Hz/ZD kHz) (N0 load)

Phono Over Load (No load)
Phono (MM)

Dimensions (W x H x D)

110 mV 2 90 mV

17-1/2 X 4-1/16" x14-1I4"

(443 X 103 X 361 mm)
Weight

North America area modal

International model
Power Supplies

North America area model

International model

12 lbs. 12 02. (5.8 kg)
15 lbs. 7 oz. (7.0 kg)

AC 120 V. 60 HZ
AC 230/240 V. 50/60 HZ

Power Consumption
North AmeriCa area model 130 W
International model 165 W

* International model 0.56 Hz ~ 167 kHz

These specifications are service target specs.

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

LEAKAGE TEST (FOR SERVICE ENGINEERS IN THE U.S.A)

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 hardware is not lodged
between the, chassis and other
metal parts in the unit.

2. Be sure that any protective de-
vices such as nonmetallic control
knobs, insulating fishpapers,
cabinet backs, adjustment and
compartment covers or shields,
isolation resistor-capacity net-
works, mechanical insulators, etc.
which were removed for servicing
are properly reinstalled.

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 fol-
lows:
Plug the power cord directly into a 120-volt AC
receptacle (do not use an Isolation Transformerfor
this test). Using two clip leads, connect a 1500
Ohm, 10-watt resistor paralleled by a 0.15 pF ca-
pacitor, 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 pervolt, or higher sensitivity to measure the
AC voltage drop across the resistor. (See Dia-
gram.) Move the resistor connection to each ex-
posed metal part having a return path to the chas-
sis (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.)

TO EACH EXPOSED
METAL SURFACE OF
UNIT UNDER TEST

SIMPSON MODEL 229 ETC. FOR
LEAKAGE TEST

HIGH GROUND concurr, ETC.

VOLTAGE LEAD
OF! + LEAD
VTVM
0 AC SCALEO

1.5km
10W

VW

__ll___

0.l5uF

TEST PROBE

CONNECT TO KNOWN

TO EXPOSED
EARTH GROUND

METAL PARTS

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.

-0.4 dBiO.5 dB/-0.12 dBi0.5 dB

TO AC GROUND SUCH
AS WATER PIPEBX CABLE