XXV-02A
2
BLOCK DIAGRAM
PREAMPLIFIER UNIT (X08-4240-10)
Operation / Condition / Compatibility
(1/4, 2/4) : Ach HPF, (2/4) : ALch buffer, (3/4) : BRch invert buffer
IC2
Bch infrasonic filter
IC4
(1/4, 2/4) : Bch HPF, (3/4, 4/4) : Bch LPF
IC5
Bch buffer
IC6
(1/2) : BLch buffer, (2/2) : BRch invert buffer
IC7
LCD driver, key scan
IC8
Bch E-VOL IC
When AMP-CON SW ON, from H/U (via Lx-Bus) change
sound by AMP-CONTROL
COMPONENTS DESCRIPTION
(X09-5940-10)
(X08-4240-10)
ISOLATION
HIGH
AMPLIFIER
R
L
BUFFER
VR3
IC3
Q42
Q41
MUTE1
DIFFERENTIAL
STAGE
Q305,307,311
Q306,308,312
IC1
Q320,322
STAGE
B-CLASS
Q323,325
R
L
IC3
VR5
IFS
IC2
Q405,407,411
Q43
Q423,425
Q406,408,412
Q44
Q424,426
DC DETECTOR
OVER LOAD
Q56,57,60,61
Q30,31
CIRCUIT
P. CON
OVER VOLTAGE
CIRCUIT
I DETECTOR
BU DETECTOR
P-SW
SW5V
BU5V
Q25
DC/DC
CONVERTER
Q17,18,26
AVR
POP NOISE CIRCUIT
MUTE2
Q22
901,902
Q50-53
FAN
RST IC
E2PROM
I2C COMMUNICATION
to AMP
5L COMMUNICATION
to H/U
LOGO LED
DIP SW
DISPLAY
LCD
DRIVER IC
LCD
KEY
LED+B
MUTE1
DIFFERENTIAL
STAGE
STAGE
B-CLASS
MUTE1
DIFFERENTIAL
STAGE
STAGE
B-CLASS
MUTE1
DIFFERENTIAL
STAGE
STAGE
B-CLASS
VR1
VR1
PASS
BUFFER
AMPLIFIER
ISOLATION
AMPLIFIER
ISOLATION
AMPLIFIER
ISOLATION
PASS
HIGH
HIGH
PASS
LOW
PASS
HIGH
PASS
PASS
LOW
BUFFER
BUFFER
VR2
IFS
CONTROL
AMP
IC
SW5
RCA IN
RCA IN
RCA IN
RCA IN
ACH
BCH
VR4
IC1
IC1
IC1
IC2
IC3
VR2
VR5
VR4
SW5
VR3
IC3
SP
OUT
OUT
SP
OUT
SP
OUT
SP
THERMAL
PROTECTION
DETECTOR
DETECTOR
V-DOWN
Q11-16,
u-COM
BU
PCON
VCC
15V/-15V
COMMUNICA
TION
I2C
V
V
6db
6db
27db
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