Kenwood KR 3400 Service Manual

Page 2

CONTENTS

EXTERNAL 81 TOP VIEW .............................................. 3
EUROPE TYPE / POWER VOLTAGE ...................................... 4
DISASSEMBLY /' CORD STRINGiNG ...................................... 5
REPLACEMENT OF IC ............................................... 6
CONNECTOR / PACKING ............................................. 7
BLOCK DIAGRAM .................................................. 8
CIRCUIT DESCRIPTION ............................................... 9
ADJUSTMENTS ............................................... 10, 11
MODIFICATION PARTS LIST ....................................... 12, 13
PARTS LIST ................................................... 14~16
PC BOARD .................................................... 17~20
TROUBLESHOOTING ............................................... 21
SEMICONDUCTOR SUBSTITUTIONS & LEADS ........................... 22
KR-3400 SCHEMATIC DIAGRAM ....................................... 23
KR-2400 SCHEMATIC DIAGRAM ....................................... 24
MODIFICATION OF SCHEMATIC DIAGRAM ............................... 25
KR-3400 SPECIFICATIONS ............................................ 26
KR-2400 SPECIFICATIONS ............................................ 27

KR»3400, KR724OO is the products in NEW KR SERIES AM-FM STEREO RECEIVERS.

ln TUNER section, two ICs are employed for!r AM, FMelF, FM-MPX, AM-OSC, and AMeMIX.
FM DET. OUT jack is available, permitting this receiver to be ready for FM 4ech broadcasts.
CONTROL AMP contains PREAMP equipped with an IC and CRetype TONE CONTROL section
which is made use of NFB effect from MAIN AMP.

MAIN AMP consists of the differential amplifier in the first stage. class A driver and pure comv
plementary OCL output stage.

With respect to KR»3400, KR72400 in NEW KR series, there are many advantage for good product-
ivity and easy handling by using a common POWER SUPPLY and the connectors.

Note:

The products are subject to modification in components and circuits in different countries and regions.
This is because each product must be used under the best condition. This manual provides information of
modification based on the standard in the U.S., for the convenience of ordering associated components and
parts.

We employ the following abbreviations of respective countries.

U.S.A ..................... K England .....

Canada . Scandinavia .

PX .......... South Africa. . .
Australia ...... Otherareas ................ M

Europe