Harman kardon td 450 service manual

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The Harman Kardon
MOdel TD450 Manual A

CD TRANSCRIPTION QUALITY CASSETTE DECK

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harman kardon TDASU

harman /kardon

80 Crossways Park West, Woodbury. N. Y.11797
1112-TD450 P-11951200 Printed In KOREA

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SPECIFICATIONS
Nominal limit Nominal Limit
Track Configuration 4-track 2 Channel Stereo Channel Separation 45dB 235dB
. Cassette Deck Crosstalk 70dB 2 50dB
~ MECHANICAL SECTION Record/Playback Distortion
Record/Playback Tape Speed (input ikHz)
Drift 4.75cm/sec. 0.2% i 2.0% LN 0.9% S2.0%
Wow and FIutter(WTD) 0.05%(NAB)SO,1°/o Croz 1.5% S2.5%
0.07%(CCIR) Metal 13% S2.5%
Take Up Torque 509r - cm 35~709r - cm MPX filter Attenuation
Back Tension 4gr - cm 2~egr - cm at 15kHz 0.3dB S tdB
F.FWD Torque 1009r . cm 70~150gr - cm at 19kHz 35dB S30dB
REW Torgue 100gr - cm 70~1SOgr . cm Erase Ratioanput 80Hz>
F.FWD/REW Time SOsec. S 1 tOsec. LN 70dB 260dB
(060 Tape) Metal 61 dB 2 56dB

~ AMPLIFIER SECTION

input Sensitivity 45mV 40(rnin)~ 100(max)mV

Bias Frequency 105kHz i 5kHz (input 1kHz)at Line input
Playback Output(10K S2) _ 640mV i 1 ,5dB input impedance 22k9 19(min)~30(max)k§2
SignalI-to-Noise Raito (input 1kHz)at Line input
at Line in
(mm 1k§§f100mw ' DIMENSIONS(W>< H x D) 17-3/ .. >< 5"x12-5/8"
IHFAA WTD at Dolby Level (442 X 26 X 320mm)
Dolby NR otf ' WEIGHT 5-4kg
LN 51dB ~ POWER SUPPLY
" it CrOz 54dB USA. and Canada models ACIEOV, 60Hz 138
Metal 54dB International AC230V, 50/60Hz 0 1E)
Dolby B NR
LN 61dB ~ POWER CONSUMPTION
CrO; 64dB SSOdB USA and Canada models 18W an
Metal 64dB SGOdB International and Australia models 18W 011:)
Dolby C NR
LN 66118 These specifications are service target specs
CrOz 70dB S 66413 Specifications and components are subject to' change
Metal 70dB S 66dB without notice.

X 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

SIMPSON MODEL 229E, FOR
LEAKAGE TEST

TO EACH EXPOSED

TO AC GROUND SUC
METAL SURFACE OFH H

AS WATER PIPE, BX CABLE.

parts in the unit. N'T UNDER TEST HIGH GROUND comoun. ETC,
2. Replace all protective devices such as none VOLTAGE LFAU
OR-IrLtAD

metallic control knobs. insulating flshpapers,
cabinet backs, or shields isolation resistor- _
capacitor networks. mechanical insulators, TA
ect.

3. Be sure that no shock hazard existszcheck for leakage current VTVM
using Simpson Model 229 Leakage Tester, standard equip» 70M: SCALEO-
ment item No.2l641. RCA Model WT540A or use alternate

method as follows: £15013?
Plug the AC line cord directly into 120-volt AC receptacle(do not
-JVV\r-~

use an isolation Transformer for this test). Using two clip leads,
connect a 15000hmt 10-watt resistor paralleled by a 0.15u F 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 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 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 whlch must be corrected before returning
the unit to the owner

L,_{ |_._.

0"! B/zF

TEST PROBE

CONNECT TO KNOWN
EARTH GROUND

TO E XPOSED
METAL PARTS

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