Kenwood XXV 02 A Service Manual

Page 1

XXV02 A KENWOOD

Kenwood Corporation

SERVICE MANUAL

© 2005-4 PRINTED IN JAPAN
853-0283-00 (N) 1553

Heat sink
(FO1-1796-01)

> g c 3 c L
A A $1M W W WXiispm.ed
on European Model
Screw Screw * Dressing plate
(N07-0003-08) (N09-4214-O8) (A21-xxxx-xx)

{fl r-1

H i i i
, E {
13 E gig 0» "m i
i/ i e QUE ewe
Fuse(30A)

(F52-0015-05)

' Screw & Wrench key set
Cover (N99-1770-15)

(F07»xxxx-xx)
i "eXcelon" is not printed

on European Mudei

@ Screw set
ngw '7 (N99-1577-15)

Accessory
@¥ (W01-1606-05)

Depends on the destination. Refer to the parts list.

Page 2

XXV-02A
BLOCK DIAGRAM

(me-594040) -
m mos-42404 0) VS; 54), -| 2m
RCA IN ! PASS VR m Q4. 0305307311 0323325
ISOLATION . ,v l-I sp
LIC@"| AMPLIFIER | BUFFER MUTET OUT
I 042 0306305312 Oaao 322

SP
OUT

FICA IN

LI© I TION
IAMPLLAIFIER

ICS Q43 0405401411 0423425
' IFS ' BUFFER AMP -. STAGE
LOW |

COMMUNICATION

ICI '02 sw5 Q44 OAOGAOSAIZ 04244326
8 a MUTEI I 3'?
RCA IN I I I

I I5Vri5V -'

I- _ _ _ Q56,57.50,S|
I -- DRIVER IC - LEWB VCC gSEDREESEOOR
[C _| Guys DETECTOR

Q17,Ta,26 901(902 030,31
-PCON

LOGO LED
050753
5L COMMUNICATION MOM MUTE2
[C Wu ROP NOISE CIRCUIT
I20 COMMUNICATION
THERMAL

O22
TOECTOR
E2PROM

RST IC DIR sw 025
-o@ BL_ DETECTOR

E DETECTOR

COMPONENTS DESCRIPTION

0 PREAMPLIFIER UNIT (X08-4240-10)

Ref. No Application / Function Operation / Condition / Compatibility
|C1 (1/4, 2/4) :ACh HPF, (2/4) :ALch bufler, (3/4) :BRCh invert buffer
IC2 Bch infrasonic filter
|C4 (1/4, 2/4) :Bch HPF, (3/4, 4/4) :Bch LPF
ICS BCh buffer
ICG (1/2) :BLch buffer, (2/2) :BRCh invert buffer
|C7 LCD driver, key scan
When AMP-CON SW ON, from H/U (via Lx-Bus) Change
|C8 Bch E-VOL IC
sound by AMP-CONTROL