Harman kardon hk 3450 3550 service manual

Page 1

The Harman Kardon

Model HK3450/ H K3550

STEREO RECEIVER

T@@hmfi@@ MEITTUIEI

follows:

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

HK3550 Eb : North America area model Black version
HK3450/HK3550 (B :lnternational model Black version
HK3450/HK3550 o :lnternaional model

CONTENTS

SPECIFICATIONS - 2
LEAKAGE TEST --------- 2
DISASSEMBLY PROCEDURES 3
CIRCUIT DESCRIPTION -- 4
BLOCK DIAGRAM 5
TIMING CHART ----- 5
ALIGNMENT PROCEDURES ----- 6
GENERAL UNIT PARTS LIST ~- 8

GENERAL UNIT EXPLODED VIEW -
P.C. BOARDS ------------------
ELECTRICAL PARTS LIST ..
IC BLOCK DIAGRAMS -------
IC TERMINAL FUNCTION
SCHEMATIC DIAGRAMS
W|RING D'AGRAM .................................................... 30

harman/kardon

Parts and Service Office
80 Crossways Park West, Woodbury, N.Y.11797
1112-0600A152 K9404 1500 Printed in Japan

Manual 194A

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HK3450

HK3550
SPECIFICATIONS
Nominal Limit Nominal Limit
.FM SECTION Channel Separation (at 3an
Tuning Range 37.5MHZ - 103.0MH2 Video/CD 73.0dB g 45.0dBiHK3450)
SOdB Quieting Sensitivity 53.0dB e 45,0dB (HK3550)
Mono 14.2dBf é 19.0dBI w Phono(MM) 63.0dB 2 40.0dB
24.5dEf é 27.0dBf QB IM Distortion Ratio (at 15W) 0.047% § 0.1%
Stereo 37.2dBf é 41.0dBf ED HMS Output Power
47.0dEf § 9 89,1kHl, THD 0.1% 33.0w : 30W (HK3450)
Usable Sensitivity 12.0dBf é CD 48.0W é 50W(HK3550) ED
14.0dBf é fl} 43.0w 2 40W(HK3550I fl?
Image Flatio 85.0dB : 49,1kHz, THD 0.3% 55. OW B 35W (HK3450]
IF Rejection 105.0dB 2 71. 0W ; 55WlHK3550) GD
Spurious Response Rejection 110.0115 71. 0W 2 50W (HK3550) Q3
Capture Ratio (at 45dBI) 1.5dB é High- instantaneous Current Capability
Alternate Channel Selectivity 77.0dB g (HCC) 30. 0A a 20. 0A (HK3450)
(+4OUkHz,-400kHZ 45dEf input) 38. DA 2 30. DA (HKSESO)
AM Rejection (at 45 dBf] 60.0dB e Damping Factor (at IkHz] 44.0 e 30. 0
Signal to Noise Ratio (at BSdBf) Tone Control Characteristics
Mono Bu.0dB a Bass at 50Hz
73.5dB a Boost 1DdB t ZdB
Stereo 70.5dB e Cut 1DdB t ZdB
64.5dB g Treble (at TDkHz)
Total Harmonic Distortion Boost IDdB : ZdB
(at 8511 Bf IkHz input) Cut 10dB t ZdB
Mono 0.05% § 0.3% Loudness Control (at SDHz) 1MB 1 MB
Stereo 0.1% g 0.4% DC Output Voltage
Stereo Separation (at ikHz) 4E. 5dB 2 42.0118 G) L channel 34mv : EDmV
471MB 2 35 OdB a R channel 24mV t GDmV
.AM SECTION Idling Current
Tuning Flange 530kHz - 1710kHz ED Lchannel 32.4mVi SmV
531 kHz - 1602kHz {B R channel 32.4mV 1' SmV
ZOdB S/N Usable Sensitivity 400pV/m é 7DOpV/m Phone Overload (at ikHz] 123.0mV e liOmV
Selectivity [+10kHz, -1DkHz) 35.0dB g 25.0dB filAA Equalization
Signal to Noise Ratio 52.0dB e 47.0dB ZflHz-ZokHz 0.263 0.2dBi 0.5dB
Image Reiection 39.0dB g 30.0dB .DIMENSIONS 17»3/8" x 4'1/8x 13-3/4
IF Rejection 63.0dE e 50.0dB (Wx H x D) (443 x 105 x 345 mm)
.AUDIO SECTION .WEIGHT 16.3Ibs./(7.4kg) (HK3450)
Usable Sensitivity 17,3Ibs./(B.1 kg) (HK3550)
Video/CD at 30W output) 135t0mV i 25mV/26kohm IHKBASO) .POWER SUPPLY AC120V,60H1 I»
Video/CD at 50W output) 135.0mV i ZSmV/Zfikohm [HK3550] AC230V/240V, SOKHZISSng 0
PhonoiMM) (at 30W output] 2.2mV *O.4mV-O.2mV/dflkohmiHKfiSO) .POWER CONSUMPTION 17 0W (HK
PhonolMM) (at 50W output] 2.2mV +OAmV-MmV/48kohmiHK3550) 235W (270VA) (HKSSSO)
Sig/ram locigoise Ratio (HK35 50]
i so 84.0dE E 76.0(15 H r ,
F 0,le 81.0dB E 73.0dB These specifications are sarvrca ravgzto specs.
reouency esponsa - ~ - >
(5 -3dB down) 0.4Hz-175kH2

Overall performance will be 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 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 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 leak-
age current using Simpson Model 229 Leakage
Tester, standard equipment item No. 21641, RCA
Model WT54OA or use alternate method as follows:
Plug the power cord directly into a 120vvolt 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 pF capacitor, in
series with all exposed metal cabinet pans and a
known earth ground, such as a water pipe or con-
duit. 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 resis-
tor 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
2 before returning the unit to the owner.

SIMPSON MODEL 229 ETC FOR
LEAKAGE TEST

TO AC GROUND SUCH
AS WATER PIPEBX CABLE,
CONDUIT. ETC.

TO EACH EXPOSED
METAL SURFACE OF
UNIT UNDER TEST

HIGH
VOLTAGE
0R 4LEAD

GROUND
LEAD

6

VTVM
-0 AC sumo.

1.5km
IDW

MA

__II__

0.15uF

TEST PROBE

CONNECT T0 KNOWN
EARTH GROUND

T0 EXPOSED
METAL PARTS