Harman kardon hk 6950 service manual

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The Harman Kardon

Model HK6950R

Manual 187A

INTEGRATED AMPLIFIER

Tecehmfiw Meme]

harman kardon

0 : German model

The following marks found in the parts list of this manual
identify the models as follows.
{EB : North America area model Black version

ED : German model Black version
IE. : International model Black version
MB : Asia/Oceania model Black version

CONTENTS

SPECIFICATIONS'
LEAKAGE TEST
DISASSEMBLY PROCEDURES
POWER CORD REPLACEMENT--
ALIGNMENT PROCEDURES
BLOCK DIAGRAM """"""""""
CONTROLS & FUNCTIONS ........................................... 5

inseam;

GENERAL UNIT PARTS LIST--
GENERAL UNIT -
PC. BOARDS --------
ELECTRICAL PARTS LIST
SCHEMATIC DlAGRAMSw-
WIRING DIAGRAM ----------

harman/kardon

Parts and Service Office
240 Crossways Park West, Woodbury, NY. 11797
111270250A152 P-079206 1500 Printed in Japan

80969)IH

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HK6950R

SPECIFICATIONS
Nominal Limit Nominal Limit
Continuous Average Power (FTC) Tone Control Characteristics
20Hz-20kHz, both channels driven Bass (at SOHz)
an, 0.08% HMS 190w g 170w «some Boost 10dB i 2dB
140W a 120W OGEGB Cut 10dB i 2dB
4o, 0.1% RMS 195W; 170W Treble (at 10kHz)
High-instantaneous Current Boost 10dB i 2dB
Capability iHCC) 85A ; 70A Cut 10dB i 2dB
Half Power Bandwidth <10Hz~>100kHz <10Hz~70kHz Filters
Frequency Response Subsonic 15Hz, 3:13 i 1dB/Octave
(at -3dB down) 0.16Hz~200kHz <1Hz~>160kHz Phase Correct Loudness at 50Hz 6dB i- 2dB
ED? DC Output Voltage
0.16Hz~150kHz <1Hz~>110kHz L channel OmV i BOmV
0G3 R channel OmV i BOmV
Square Wave Rise Time 2/1590 é 2.5/xsec RIAA Equalization at Tape Out
input Sensitivity (at 170W output) (20Hz/20kHz) (10km load) 0.2dB i0.5dB
CD 135mV-_l- 25mV Phono Over load (No load)
Phono (MM) 2.0mV i 0.3mV 133% Phono WWI) 158mV E 120mV
2.2mV i 0.3mV $63 Phono (MC) 8.5mV ; 5mV
Phono (MC) 110,11V : 20,) Dimensions (W x H x D) 17-3/8" x 6-5/16" x15-15/16"
130w: 20/1V 903;) (443 x 160 x 405mm)
Signal to Noise Ratio Weight 37.5le (17.0kg)
CD 78dB ; 70dB Power Supply AC 120V, GOHZ 33
Phono (MM) 77.6dB ; 71dB 131M? Ac 230/24ov, 50/60Hz
77.6dB ; 75:13 003:! (RENEW?
Phono (MC) 74dB ; 67dB Power Consumption 350W {Eb
Channel Separation (at 10kHz) 400W
gfiono (MM) 484233 E 23:: These specifications are service target specs.
Phono (MC) 491MB g 40dB Specifications and components subject to change without notice.
IM Distortion Ratio 0.039% g 0.1% Overall performance will be maintained or improved.
Damping Factor at 1kHz 100 .2. 70

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 cer-
tain that leads are not pinched or SIMPSON MODEL 229 ETC. FOR

that hardware is not lodged be- LEAKAGE TEST
TO EACH EXPOSED TO AC GROUND SUCH

tween the chassis and other metal METAL SURFACE 0,; As WATER on GAS pipe,
parts in the unit. UNlT UNDER TEST HIGH GROUND BXCABLECONDUIT. ETC.
2. Replace all protective devices such XQLICEED LEAD

as nonmetallic control knobs, in-
sulating fishpapers, cabinet backs, 6
adjustment and compartment cov- VTVM
ers or shields, isolation resistor- -0 Ac SCALE 0-
capacitor networks, mechanical in-

sulators, 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 0.15;: F

capacitor, in series with all exposed metal cabinet parts and a

known earth ground, such as a water pipe or conduit. Use a VTVM TO EXPOSED CONNECT To KNOWN

or VOM with 1000 ohms per volt, or higher sensitivity to measure METAL PARTS EARTH GROUND

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.

1.5KOHM
10W

TEST PROBE