Harman kardon td 392 service manual

Page 2

N
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M
D
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SPECIFICATIONS

Track Configuration

Nominal Limit
4-track 2 Channel Stereo
Cassette Deck
0 MECHANICAL SECTION
Record/Playback Tape Speed
Deviation 4.75 cm/sec.
Drift 4.75 cm/sec.
Wow and Flutter

0.05% :1.5%

0.2% i1.5%
0.05%(NAB)50.08%
0.08%lCCRlsO.14%

SOgr. cm 35~709r. cm
4gr. cm 2~6gr. cm
1009r. cm 70~1509L cm

Take Up Torque
Back Tension
F.FWD Torque

REW. Torque loogr. cm 70~1509r. cm

F.FWD/REW. Time 90 sec. S100 sec.
(C760 Tape)

Motor Direct Drive motor

. AMPLIFIRE SECTION

Bias Frequency

Playback Output

Signal-to-Noise Ratio
at Line Input (Input 1kHz,100mV)
lHF-A WTD at Dolby Level

105kHz: SkHz
SOOmV :E1,5dB

Dolby NROff LN 51dB
CrOz 54dB
Metal 54dB
Dolby B NR LN 61dB
Cr02 64dB 2 BOdB
. Metal 64dB 2 BOdB
Dolby C NR LN 66dB
CrOz 70dB 2 66dB
Metal 70dB 2 66113

*Dolby noise reduction and HX PRO headroom extension manufactured under
license from Dolby Laboratories Licensing Corporation. HX PRO originated
by Bang and Olufsen. Dolby", the double-D symbol and HX PRO" are
trademarks of Dolby Laboratories Licensing Corporation.

Nominal Limit
Channel Separation 43dB a 35dB
Crosstalk 70dB z 60dB
Record/Playback Distortion

llnput lkHz)

LN 11 /0 S 2.0%
CrOz 1.8%53.0%
Metal 1.1 % s 2.0%
MPX Filter Attenuation
at 15kHz 0.3dBSldB
at 19kHz 35dB 2 30dB
Erase Ratio (Input 80Hzl
LN 70dB z 60dB
Metal 55dB z 52dB
Input Sensitivity GOmV 40(min)~100(maxlmv
(Input 1kHz] at Line Input
Input Impedance
(Input 1kHZl at Line Input

0 DIMENSIONS (W x H x D) 177/16 x 4-13/16 x 13-1/8
(443 x 122 x 334 mm)

12lbs. 1301. (5.8kgl

24kt? 19(min) ~ 30(maxikfl

C WEIGHT
0 POWER SUPPLY

U.S.A. & Canada models AC 120V, 60Hz
General model AC 100/120/220/240V,
50/60HZ

0 POWER CONSUMPTION

U.S.A. & Canada models 30W
General model 35W

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

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

LEAKAGE TEST (FOR SERVICE ENGINEERS IN THE U.s.A.I
Before returning the unit to the user, perform the following safetychecks:

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 cover
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 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 [AF 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 Diagraml 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 UNDER TEST

SIMPSON MODEL 229 ETCt FOR
LEAKAGE TEST

TO AC GROUND SUCH
AS WATER PIPE,BX CABL
CONDUlT, ETC.

HIGH
VOLTAGE
OH + LEAD

GROUND
LEAD

é

VTVM
-0 AC SCALEO_

1,5kn
10W

NW

__||_

0.15uF

TEST PROBE

TO EXPOSED
METAL PARTS

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 RMS or more is excessive and indicates a potential shock hazard which must be corrected before

returning the unit to the owner.