Harman Kardon AVR 254, Service Manual

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harman/kardon
AVR254
7 X 50W 7.1 CHANNEL A/V RECEIVER
SERVICE MANUAL
CONTENTS
ESD WARNING……………………………….2
LEAKAGE TESTING……………….…..…....3
BASIC SPECIFICATIONS…………………..4
PACKAGING…………………………….……5
FRONT PANEL CONTROLS………..…..…..6
REAR PANEL CONNECTIONS………….…9
REMOTE CONTROL FUNCTIONS……….12
CONNECTIONS/INSTALLATION………....15
OPERATION………………………...………28
TROUBLESHOOTING GUIDE…...……..…32
REMOTE & PROCESSOR RESETS……....33
DISASSEMBLY…...…………………………..34
UNIT EXPLODED VIEW…………..…….…..35
EXPLODED VIEW PARTS LIST……………36
AMP BIAS ADJUSTMENT……………….…37
BLOCK DIAGRAM…………………………..38
PCB DRAWINGS……………………………39
ELECTRICAL PARTS LIST………..….……46
SEMICONDUCTOR PINOUTS…….………88
SCHEMATICS……………………………….176
WIRING DIAGRAM………………………….189
harman/kardon, Inc.
250 Crossways Park Dr.
Released 2008 Woodbury, New York 11797 Rev0 5/2008
Discontinued XXXX