Kenwood KACX 541 Service Manual

Page 2

KAC-P8541/X541

BLOCK DIAGRAM

(X09-5780-10) -______
m I1mm 60-1 0) VS; m -I ma
FICA IN ! PASS VR m Q4. 0305307311 0323325
ISOLATION . ,v l-I sp
LIC@"| AMPLIFIER | BUFFER MUTET OUT
I 042 0306305312 Daze 322

SP
OUT

FICA IN

LI© I TION
IAMPLLAIFIER

IC3 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,SI
I -- DRIVER IC - LEWB VCC gSEDREESEgOR
[C _| Guys DETECTOR

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

LOGO LED
050753
5L COMMUNICATION MOM MUTE2
ID H/U POP NOISE CIRCUIT
I20 COMMUNICATION
THERMAL

O22
TOECTOR
E2PROM

RST IC DIP sw 025
-o@ BI-_ DETECTOR

LI- DETECTOR

COMPONENTS DESCRIPTION

0 PREAMPLIFIER UNIT (X08-4160-10)

Ref. No Application / Function Operation / Condition / Compatibility
|C1 (1/4, 2/4) :Ach HPF, (2/4) :ALCh bufier, (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