Kenwood KAC 821 Service Manual

Page 1

STEREO POWER AMPLIFIER KENWOOD
KAC-821
SERVICE MANUAL

C1989-8 PRINTED IN JAPAN
85176079700(8)2984

Heatsink
(F01-1312-01) IE TYPE]
IF01-1341-01I IK TYPEI

Screw lermmal board (4?)
(E2004 79435)

» ,- : RECIPLAY Jack
(E0670816-05I
Phone lack

(FIB-0256435)

Screw termmaI board I3P)
(E20-0323-05)

Accessoiy
(W01-O701-05) IE Type OnlyI

DC cord
(E3073577~05I
Cold With DIN connectot
(E Type only) EEO-3587705) (E Type only)
Screw set
IN99-1529»05)
USE OF THE OPERATION PANEL PC BOARD (Component side View) ............... 9
ACCORDING TO SYSTEM TYPE ............... . 2 PC BOARD IFoiISIde view) ................... 10
CONNECTIONS ................................... 3 SCHEMATIC DIAGRAM ........................ 11
DISASSEMBLY FOR REPAIR ....................... 4 EXPLODED VIEW ............. V ............. 14
BLOCK DIAGRAM ........................... . 5 PARTS LIST ....................................... 15
CIRCUIT DESCRIPTION ......................... 6 PACKING ... ............................ V . 19

ADJUSTMENT*REGLAGEIABGLEICH. . . ....... 8 SPECIFICATIONS .................... BACK COVER

Page 2

KAC-821

USE OF THE OPERATION PANEL ACCORDING TO SYSTEM TYPE

- Input midvlty control ' Mode switch
The Input sensitivity control adjusts the input Set this switch according to the impedance
sensitivity within a range ol 0.1 Vto 5.0 V conA of the speaker: or the output method, as
1 tinuouely. enapllng expansion with various sys- shown below.
terns. This unit has been not for 0,3V. WM" mm WM" Zthm WM "in I
KENWOOD head unit Amplitle nput Ipulkoll no mpg-ton en mag-a out-
preout level lMAX.) sansltlvity Conwfld com-cud pm me
300 mV 0.1 v "W
W 0.3.0. A '_ 1.47'

KAC-821 0:)

0 Sub Hooter ovum

By setting the switch on the right to ON. you

can set the output 01 this unit tor sub woolar

output lmnnourel output). The control on the

L J: Ieit can be uted to adjust the sub woofer cut-
CI 0" lrequency.

0 OFF ON L3

I This unit is provided with e bridged output function which enables you
to double the units power output. (for 4 9 speakers)
I When using a KENWOOD DIN output system:

KAC-821 Output
M

CASSETTE

Leit 898" Input cable
RECEIVER,
GRAPHIC

Right speaker H RCA pin cord (optional) a:
EOUALlZER

9 e
: flaw RAG-321 m.
,"1? vi
l

Power control power supply

- When using an RCA pin-plug cord output system:
Power control power supply

115% KAC~82 1
I] if 3:
O Left

9 9 output
Cu-mu

Lott speaker -3-, Hum, a,
other RCA
Right speaker DIE-fl [ output

e e KAC-821 "mm
H @ SEW
, . 9 Right output

Power control power supply