Harman kardon hk 3490 service manual 2

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harman/kardon HK 3490/230 Service Manual

harman/kardon Service Manual

HK 3490/230

2 x 120W STEREO RECEIVER

harman/kardon

CONTE NTS
LEAKAGE CHECK 2 EXPLODED VIEW AND PARTS 13
ESD WARNING 3 ELECTRICAL PARTS LIST 14
TECHNICAL SPECIFICATIONS 4 SEMICONDUCTOR PINOUTS 34
TROUBLESHOOTING GUIDE 5 PCB DRAWINGS 58
FRONT PANEL CONTROLS 6 BLOCK DIAGRAM 64
REAR PANEL CONNECTIONS 7 WIRING DIAGRAM 65
PACKAGE LIST AND PARTS 8 AMP BIAS ADJUSTMENT 66
DISASSEMBLY 9 SCHEMATIC DIAGRAMS 67
Released EU2008 harman/kardon, Inc. Rev 0, 09/2008

250 Crossways Park Dr.
Woodbury, New York, 11797

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harman/kardon

SAFETY PRECAUTIONS

The following check should be performed for the continued
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
c.5mA.

T

o

Reading should

Leakage not be above

0.5mA
Device current
under tester 0
test
Test all
94 exposed metal
surfaces

Also test with
plug reversed
(Using AC adapter Earth
plug as required) ground

AC Leakage Test

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.

HK 34901230 Service Manual

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