Harman Kardon HK3270 Service Manual

harman/kardon
HK3270/3270RDS
STEREO A/V RECEIVER
SERVICE MANUAL
CONTENTS
SPECIFICATIONS…………….………..…..2
ESD WARNING……………….…………….3
LEAKAGE TESTING…………….………....4
ALIGNMENT PROCEDURES…….……….5
ALIGNMENT & TEST POINTS…….…..….5
CONTROLS AND FUNCTIONS…….…..…8
REAR PANEL CONNECTIONS…………...9
REMOTE CONTROL FUNCTIONS………10
CIRCUIT DESCRIPTIONS………….…..…11
BLOCK DIAGRAM…………….……….…..21
DISASSEMBLY PROCEDURES………....22
HK3270 EXPLODED VIEW……………....25
HK3270RDS EXPLODED VIEW………....26
DISASSEMBLY/SCREW LOCATIONS…..27
MECHANICAL PARTS LIST………………30
ELECTRICAL PARTS LIST…………….…31
IC BLOCK DIAGRAMS………….…….…...47
P.C. BOARDS……………………...……….55
SCHEMATIC DIAGRAMS…….….………..58
WIRING DIAGRAM…………………….…..63
HK3270 PACKING MATERIALS……….…64
HK3270RDS PACKING MATERIALS….…65
harman/kardon, Inc.
250 Crossways Park Dr.
Woodbury, New York 11797 Rev1 2/2004
All manuals and user guides at all-guides.com
all-guides.com

Harman Kardon HK3270 Specifications

General

Number of Channels	2
Frequency Response	10Hz - 100kHz
Tuning range	87.5 MHz - 108.0 MHz FM, 522 kHz - 1611 kHz AM
Total Harmonic Distortion	0.09%
Input Sensitivity	200mV (line)
Signal to noise ratio	95dB
Speaker load impedance	8 ohms

Summary

Specifications

Front Amp Section Specs

Detailed specifications for the front amplifier.

FM Section Specs

Detailed specifications for the FM tuner section.

AM Section Specs

Detailed specifications for the AM tuner section.

Alignment Procedures

Test Equipment Required

Lists necessary test equipment for alignment.

Alignment & Test Points

Diagram of test points and alignment procedure overview.

AM, IF and RF Signal Alignment

Steps for aligning AM, IF, and RF signals.

FM IF Alignment

Steps for aligning the FM IF section.

MPX Alignment, SM Alignment

Steps for MPX and Stereo Multiplex alignment.

Controls and Functions

Front Panel Controls

Description and operation of front panel controls.

Remote Control Functions

Description and operation of remote control features.

Circuit Descriptions

Pin Diagram & Block Diagram

CPU pin diagram and overall block representation.

Input/Output Terminal Functions

Details of input and output terminals.

Protection Circuits

Speaker Protection Circuit

Describes the circuit protecting speakers from overload.

Thermal Protection Circuit

Describes the circuit protecting against overheating.

Block Diagram

Disassembly Procedures

Chassis Top Removal

Front Panel Assy Removal

Front P.C. Board Removal

Volume P.C. Board Removal

Standby P.C. Board Removal

Power P.C. Board Removal

Speaker P.C. Board Removal

Tone P.C. Board Removal

Volume LED P.C. Board Removal

Radiator & Heatsink Removal

Amp P.C. Board Removal

Tuner P.C. Board Removal

Main P.C. Board Removal

Sub P/T P.C. Board Removal

Power Trans Removal

Exploded Views

HK3270 Exploded View and Parts

Exploded view and parts list for HK3270.

HK3270RDS Exploded View and Parts

Exploded view and parts list for HK3270RDS.

Mechanical Parts List

Electrical Parts List

Schematic Diagrams

Amp Board Schematic

Detailed schematic of the amplifier board.

Front End: FE601 Schematics

Main, Power Switch, LED & Volume Boards Schematic

Tuner Board Schematic

Detailed schematic of the tuner board.

IC Block Diagrams

LC7821 Analog Function Selector Block Diagram

TDA7479 RDS Demodulator Block Diagram

LA3401 FM/AM MPX IC Block Diagram

LA1266 AM/FM IF IC Block Diagram

LC7218 PLL Frequency Synthesizer Block Diagram