KRC-597/597Y
4
●
SYNTHESIZER UNIT (X14-9182-71)
Ref. No.
Application / Function
Operation / Condition / Compatibility
IC1
System
µ
-COM
Controls FM/AM tuner, the changer, cassette mechanism, Panel, volume and tone.
IC2
E.Vol & N.C.MPX
Controls the source, volume, tone and FM multiplex detector.
Bu5V (5V), Audio8V (8V), FM+B (8V), AM+B(8V), P-CON, ANT-CON
IC3
Power Supply IC
IC4
Power IC
Amplifies the front L/R and the rear L/R to 50W or 47W maximum.
IC6
Muting logic IC
Controls logic for muting.
IC7
RDS decoder
IC8
Reset IC
“L” when detection voltage goes below 3.5V or less.
IC9
Equalizer amplifier
Dolby-B, Metal-EQ, Equalizer the Tape sound (120
µ
sec).
Sub motor control
IC 11
Sub Motor Driver
Q1
Serge Detection
“L” when the back-up voltage becomes more than 18V (momentary power down). “H” when the
back-up voltage becomes less than 18V.
Q2
BACK-UP Detection
“L” when B.u is present. “H” when B.u is absent or momentary power down is detected.
Q3
ACC Detection
“L” when Acc is present.
COMPONENTS DESCRIPTION
IN
OUT
EN1
ILLUMI
0V
OFF
5V
ON
IN
OUT
EN2
AM
FM
A8V
0V
OFF
OFF
OFF
2.5V
OFF
ON
ON
5V
ON
OFF
ON
IN
OUT
EN3
ANT-CON
P-CON
0V
OFF
OFF
2.5V
OFF
ON
5V
ON
ON
IN
SUB MOTOR
IN1 (-)
IN2 (+)
L
L
STOP
L
H
CW
H
L
CCW
H
H
STANDBY
