Harman kardon tu 909 service manual

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The Harman Kardon

Model TU909 Mam. 139A
DIGITAL SYNTHESIZED QUARTZ-LOCKED TUNER

Tedmwafl Mammal

hamn/lum TU909

m mm...
m

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

135: North America area model Black version
(33: General model Black version
(D: Australia model Black version

harman/kardon

240 Crossways Park West, WoodburyA N Y.1 1797
111273152139A2 F»088809 1500 Primed In Jfluan

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01
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SPECIFICATIONS

OFM SECTION Nominal Limit

Tuning Range 87.5~ 108.0 MHz
50dB Ouieting Sensitivity

Mono 15.2dBf§19dBf

Stereo 37.2dBf§41dBf
Usable Sensitivity 10.7dBfg15dBf
Image Ratio 45ng38dB
IF Rejection 87dB ; 70dB
Spurious Response Rejection 78dB ; 60dB
Capture Ratio 1.5dBé2dB
Alternate Channel Selectivity 76ng 60dB
AM Rejection 59ng45dB
Signal to Noise Ratio

Mono 80ng75dB

Stereo 73dB g 68dB
Total Harmonic Distortion

Mono 0.09%;0.3%

Stereo 0.07%§O.4%
Stereo Separation at 1 kHz 42ng35dB

Output Level/Impedance (Stereo) 790mV/2.2k9

0AM SECTION Nominal Limit
Tuning Range
North America area model 530~1,620kHz _
General and Australia models 531 ~1,602kHz
Usable Sensitivity

External Antenna MIN; 20,4V
Loop Antenna 350/4V/m .

Selectivity 29dB;25dB

Signal to Noise Ratio 53ng48dB

Image Rejection 40ng30dB

IF Rejection €57ng 50dB

O DIMENSION 17-7/16x2-11/16"x 14-3/16"
(WxH xD) (443x68><360 mm)

0 WEIGHT 7.3 |bs.(3.3 kg)

0 POWER SUPPLIES
for North America area model AC 120V, 60Hz
for General and Australia AC 220/240V, 50/60Hz
modles

. POWER CONSUMPTION 10W
These specifications are service target specs.

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

LEAKAGE TEST (FOR SERVICE ENGINEERS IN THE USA.)

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 devices
such as nonmetallic control knobs,
insulating fishpapers, cabinet backs,
adjustment and compartment covers
or shields, isolation resistor-capacity
networks, mechanical insulators,
etc. which were removed for servic-
ing 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 follows:

Plug the power cord directly into a 1207volt 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 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

TO EACH EXPOSED
METAL SURFACE OF
UNIT UNDEFI TEST

TO EXPOSED
METAL PARTS

SIMPSON MODEL 229 ETC. FOR
LEAKAGE TEST

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

HIGH
VOLTAGE
OR + LEAD

GROUND
LEAD

6

VTVM
0 AC SCALEO.

1,5kn
10W

VW

_|l_

0.15MF

TEST PROBE

CONNECT TO KNOWN
EARTH GROUND

resistor. (This test should be performed with the power switch in both the On and Off positions.)
A reading of 0.35 volt HMS or more is excessive and indicates a potential shock hazard which must be correc

before returning the unit to the owner.