Read Harman Kardon HK 3490 Service Manual online
harman/kardon
Service Manual
HK 3490/230
2 x 120W STEREO RECEIVER
CONTENTS
LEAKAGE
CHECK
2
ESD
WARNING
3
TECHNICAL SPECIFICATIONS
4
TROUBLESHOOTING GUIDE
5
FRONT
PANEL
CONTROLS
6
REAR PANEL CONNECTIONS
7
PACKAGE LIST AND PARTS
8
DISASSEMBLY
9
EXPLODED VIEW AND PARTS
13
ELECTRICAL
PARTS
LIST
14
SEMICONDUCTOR PINOUTS
34
PCB DRAWINGS
58
BLOCK DIAGRAM
64
WIRING DIAGRAM
65
AMP BIAS ADJUSTMENT
66
SCHEMATIC DIAGRAMS
67
Released
EU2008
harman/kardon,
Inc.
Rev
0,
09/2008
250 Crossways Park Dr.
Woodbury,
New
York,
11797
harman/kardon
HK 3490/230 Service Manual
Page 1 of 70
SAFETY PRECAUTIONS
The following check should be performed for the continued
protection of the customer and service technician.
protection of the customer and service technician.
LEAKAGE CURRENT CHECK
Measure leakage current to a known earth ground (water
pipe, conduit, etc.) by connecting a leakage current tester
between the earth ground and all exposed metal parts of the
appliance (input/output terminals, screwheads, metal
overlays, control shaft, etc.). Plug the AC line cord of the
appliance directly into a 120V AC 60Hz outlet and turn the
AC power switch on. Any current measured must not exceed
o.5mA.
pipe, conduit, etc.) by connecting a leakage current tester
between the earth ground and all exposed metal parts of the
appliance (input/output terminals, screwheads, metal
overlays, control shaft, etc.). Plug the AC line cord of the
appliance directly into a 120V AC 60Hz outlet and turn the
AC power switch on. Any current measured must not exceed
o.5mA.
ANY MEASUREMENTS NOT WITHIN THE LIMITS
OUTLINED ABOVE ARE INDICATIVE OF A
POTENTIAL SHOCK HAZARD AND MUST BE
CORRECTED BEFORE RETURNING THE APPLIANCE
TO THE CUSTOMER.
OUTLINED ABOVE ARE INDICATIVE OF A
POTENTIAL SHOCK HAZARD AND MUST BE
CORRECTED BEFORE RETURNING THE APPLIANCE
TO THE CUSTOMER.
Device
under
test
Test all
exposed metal
surfaces
exposed metal
surfaces
Also test with
plug reversed
(Using AC adapter
plug as required)
plug reversed
(Using AC adapter
plug as required)
AC Leakage Test
Leakage
current
tester
current
tester
Reading should
not be above
0.5mA
not be above
0.5mA
Earth
ground
ground
harman/kardon
HK 3490/230 Service Manual
Page 2 of 70
Each precaution in this manual should be followed during servicing.
Components identified with the IEC symbol
in the parts list are special significance to safety. When replacing a component identified with
, use only the replacement parts designated, or parts with the same ratings or resistance, wattage, or voltage that are designated in the
parts list in this manual. Leakage-current or resistance measurements must be made to determine that exposed parts are acceptably
insulated from the supply circuit before retuming the product to the customer.
Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called
Electrostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field effect transistors and
semiconductor "chip" components.
The following techniques should be used to help reduce the incidence of component damage caused by static electricity.
1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any electrostatic charge on
your body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging wrist strap device,
which should be removed for potential shock reasons prior to applying power to the unit under test.
2. After removing an electrical assembly equipped with ES devices, place the assembly on a conductive surface such as aluminum foil, to
prevent electrostatic charge build-up or exposure of the assembly.
3. Use only a grounded-tip soldering iron to solder or unsolder ES devices.
4. Use only an anti-static solder removal device. Some solder removal devices not classified as "anti-static" can generate electrical charges
sufficient to damage ES devices.
5. Do not use freon-propelled chemicals. These can generate electrical change sufficient to damage ES devices.
6. Do not remove a replacement ES device from its protective package until immediately before you are ready to install it. (Most replacement
ES devices are packaged with leads electrically shorted together by conductive foam, aluminum foil or comparable conductive material.)
7. Immediately before removing the protective material from the leads of a replacement ES device, touch the protective material to the
chassis or circuit assembly into which the device will be installed.
Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.
8. Minimize bodily motions when handling unpackaged replacement ES devices. (Otherwise harmless motion such as the brushing together
or your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity sufficient to damage an ES devices.
CAUTION :
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HK 3490/230 Service Manual
Page 3 of 70
2
Technical Specifications
18 TECHNICAL SPECIFICATIONS
Audio Section
Stereo Mode
Continuous Average Power (FTC)
Continuous Average Power (FTC)
HK 3490: 120 Watts per channel, 20Hz –20kHz
@ < 0.07% THD, both channels driven into 8 ohms
HK 3390: 80 Watts per channel, 20Hz–20kHz@ < 0.07% THD,
both channels driven into 8 ohms
@ < 0.07% THD, both channels driven into 8 ohms
HK 3390: 80 Watts per channel, 20Hz–20kHz@ < 0.07% THD,
both channels driven into 8 ohms
Input Sensitivity/Impedance
Linear (High Level)
200mV/47kohms
Signal-to-Noise Ratio (IHF-A)
95dB
Frequency Response
@ 1W (+0dB, –3dB)
10Hz –110kHz
High Instantaneous
Current Capability (HCC)
Current Capability (HCC)
HK 3490: ±45Amps
HK 3390: ±42Amps
HK 3390: ±42Amps
Transient Intermodulation
Distortion (TIM)
Distortion (TIM)
Unmeasurable
Rise Time
16 µsec
Slew Rate
40V/µsec
FM Tuner Section
Frequency Range
87.5–108MHz
Usable Sensitivity
IHF: 1.3µV/13.2dBf
Signal-to-Noise Ratio
Mono/Stereo: 73/72dBA (DIN)
Distortion
Mono/Stereo: 0.2/0.3%
Stereo Separation
40dB @ 1kHz
Selectivity
±400kHz, 65dB
Image Rejection
>80dB
IF Rejection
>100dB
AM Tuner Section
Frequency Range
522–1620kHz
Signal-to-Noise Ratio
>40dB
Usable Sensitivity
Loop: 500µV/M
Distortion
1kHz, 50% Mod: 0.8%
Europe:
±9kHz
Video Section
Television System
NTSC/PAL/SECAM
Signal Format
Composite
Input Level
1Vp-p
Input Impedance
75 ohms, unbalanced
Sync Polarity
Negative
Output Level
1Vp-p
Output Impedance
75 ohms, unbalanced
Video Frequency
Response
Response
10Hz – 10MHz
General
Power Requirement
AC 230V/50Hz
Power Consumption
HK 3490: 3W standby, 310W maximum
(both channels driven)
HK 3390: 3W standby, 230W maximum
(both channels driven)
(both channels driven)
HK 3390: 3W standby, 230W maximum
(both channels driven)
Dimension (Max)
Width
440mm
Height
165mm
Depth
382mm
Weight
HK 3490: 10.4kg
HK 3390: 9.5kg
HK 3390: 9.5kg
Depth measurement includes knobs, buttons and terminal connections. Height measurement includes feet and chassis.
All features and specifications are subject to change without notice.
Harman Kardon and Power for the Digital Revolution are registered trademarks of Harman International Industries, Incorporated.
os0015CSK - HK 3390+3490 UK v8c.qxp:18223_HK3480 eng.qxp 13/03/08 13.38 Side 18 (Sort/Black plade)
harman/kardon
HK 3490/230 Service Manual
Page 4 of 70