Harman kardon tu 911 service manual

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The Harman Kardon

Model TU911 Mm. "9,.
DIGITAL SYNTHESIZED QUARTZ-LOCKED TUNER

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

a»: North America area model

1325: North America area model Black version
0: General model

(it): General model Black version

harman/kardon

240 Crosswavs Park West, Woodbury, NY 1 1797
1112 315119A3 P7088709 1500 Printed m Japan

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1 , ' * A , X

speciFICA'riens 1.
r fl

OFM SECTION

Tuning range

SOdB Ouieting Sensitivity

Nominal Limit

87.5~108.0MHZ

Mono 14.2dBf§19dBf

Stereo 37.2dBfg41dBf
Usable Sensitivity 11.7dBf§15dBf
Image Ratio 49ng40dB
IF Rejection $32ng 75dB
Spurious Response Rejection 94dB
Capture Ratio 1.5dB g 2dB
Alternate Channel Sensitivity 60ng 50dB
AM Rejection 59dB g45dB
Signal to Noise Ratio

Mono BOdB ; 75dB

Stereo 73dB g68dB
Total Harmonic Distortion

Mono 0.15%g0.3%

Stereo 0.18%;0.5%

Stereo Separation at 1 kHz
Output Level/Impedance (Stereol

42dB g 35dB
750mV/2.2k9

Nominal Limit
0AM SECTION (North America area model only)
Tuning range 520~1,710kH2
Usable Sensitivity

External Antenna 12uV g ZOuV
Loop Antenna 355uV/m § 700uV/m
Selectivity 33ng 26dB
Signal to Noise Ratio 53ng48dB
Image Rejection 40dB g SOdB
IF Rejection 66dB g SOdB
C DIMENSION 17*7/16X2v11/15X14-3/16
(WxHxD) (443x68x360 mm)
0 WEIGHT 7.3 |bs.(3.3 kg)

0 POWER SUPPLIES
for North America area model
for General modle

AC 120V, 60Hz
AC 220/240V, 50/60Hz

0 POWER CONSUMPTION 14W

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

Specifications and components subject to change without notice. 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 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
WT54OA or use alternate method as follows:

Plug the power cord directly into a 120-volt AC
receptacle (do not use an Isolation Transformer for
this test). Using two clip leads, connect a 1500
Ohrn, 10-watt resistor paralleled by a 0.15 uF 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

TO EACH EXPOSED

METAL SURFACE OF

UNIT UNDER TEST

SIMPSON MODEL 229 ETC. FOR
LEAKAGE TEST

T0 AC GROUND SUCH
AS WATER PIPEBX CABLE
CONDUIT. ETC.

HIGH
VOLTAGE
OR + LEAD

GROUND
LEAD

é

VTVM
-0 AC SCALE 0.

1.5kQ
10W

VVV

__ll._

0.15MF

across the resistor. (See Diagram.) Move the resistor TEST PROBE
connection to each exposed metal part having a
return path to the chassis (antenna, metal, cabinet, To EXPOSED CONNECT To KNOWN

screw heads, knobs and control shafts, escutcheon,
etc.) and measure the AC voltage drop across the

METAL PARTS

EARTH GROUND

resistor. (This test should be performed with the power switch in both the On and Off positions.)
A reading of 035 volt RMS or more is excessive and indicates a potential shock hazard which must be corrected before

returning the unit to the owner.