Harman kardon pm 645 service manual

Page 2

PM645

SPECIFICATIONS
Nominal Limit
RMS Output Power
89,1kHz,THD 0.1% 45.1w Z4ow
49, (kHz, THD 1.0% 77.6w Z7OW

High Instantaneous Current
Capability (HCC) 35A
Halt Power Bandwith 10H: ~ 100kHz
Frequency Response at -3dB 4H2 ~ 135kHz
Input Sensitivity
Video/CD, Tuner 130mV i 25mV
Phono 2.2mV i 0.2mV*
Signal to Noise Ratio
Video/CD, Tuner 82.6dB 2 75dB
Phono 81.4dB Z75da
Channel Separation at 10kHz

Video/CD, Tuner 57.3dB 245w

Phono 61dB Z45de
IM Distortion Ratio 0.03% 30.25%
Damping Factor at 1kHz 85 265

Tone Control Characteristics
Bass at 50Hz

Boost 10dB t 2dB
Cut --10dB i 2dB
Treble at 10kHz
Boost 10dB t 2dB
Cut -10dB 1' 2dB
Filters
Subsonic 15Hz, 6dB/Octave
High Cut SkHz, 6dB/0ctave

Nominal Limit
Bass Contour

Boost at 50Hz +10dB

DC Output Voltage
L channel OmV t 60mV
R channel DmV i 60mV

RIAA Equalization at Tape Out
(20H: ~ 20kHz) (No load)

Phono Overload (No load)

Dimensions (W x H x D)

0.6dB S 1.5dB

140mV Z 120mV

17-1/2"x4-1/16x13-7/B
(443 x103 x 351 mm)

Weight 14 lbs. 5 oz. (6.5 kg]
Power Supplies

U.S.A. and Canada models

General and German models
Power Consumption

U.S.A. and Canada models 220W (27OVA)

General and German models 160W

AC120V, EOHz
AC220/240V, 50/60Hz

* Input Sensitivity (Phone) (or German model is 2.3mV iO.2mV.

This specification is the target of servicing. But. there is a case
that the specification is not applicable 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 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 devices
such as nonmetallic control knobs,
insulating fishpapers, cabinet backs,
adjustment and compartment cov-
ers or shields, isolation resistor»
capacity networks, mechanical in-
sulators, etc. which were removed
for servicing 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 lZO-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 0.15pF capac-
itor, 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.)

TO EACH EXPOSED
METAL SURFACE OF
UNIT UNDER TEST

SIMPSON MODEL 229 ETC. FOR
LEAKAGE TEST

TO AC GROUND SUCH
AS WATER OR BX CABLE,
CONDUIT, ETC.

HIGH GROUND

VOLTAGE LEAD
0R +LEAD
VTVM
.0 AC SCALEO_
1.5kSZ
10W
VVV
I l
I l
0.15pF
TEST PROBE
TO EXPOSED CONNECT TO KNOWN
METAL PARTS EARTH GROUND

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.