Components Description; Sub-Circuit Unit (X16-2510-10); Electric Unit (X34-3000-10) - Kenwood KDC-X679 Service Manual

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SUB-CIRCUIT UNIT (X16-2510-10)

Ref. No. Application / Function
Panel µcom
IC1
IC2 3.3V Regulater
IC3 Remote Control IC
IC4 Buffer IC
Q1 FL BLK SW
Q2,3 FL+B SW
Q4 SW5V
∇ LED SW
Q6
Q7,9 Red LED SW
Q8,10 Green LED SW
Q11,12 Blue LED SW

ELECTRIC UNIT (X34-3000-10)

Ref. No. Application / Function
System µCOM
IC1
TE
IC2 E.Vol & N.C.MPX
L 13942296513
IC3 A8V Ref Power Supply
IC4 Power IC
IC5 System E's
IC7 SW Regulator
±9V AVR
IC8
IC10 Muting logic IC
IC11 Reset IC
IC13 Panel mecha motor driver
IC14 Level meter Buffer
IC15~17 5V Pre-out Amp
IC20 SW Regulator
Q1,2 B.U.5V AVR
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Q3,4 SW5V
Q5 SW14V
.
Q6,8 AUDIO8V AVR
Q7,9 SERVO+B AVR

COMPONENTS DESCRIPTION

The power supply of IC and VFD (Logic) which are driven by 3.3V
It is change into 3.3V from 5V
VFD is turned on when Q1's base level goes "H"
FL+B (VDD2) is turned on when Q2's base level goes "H"
The power supply of IC3 is turned on when Q4's base level goes "L"
∇ LED is turned on when Q6's base level goes "H"
RED LED is turned on when Q7's base level goes "L"
GREEN LED is turned on when Q8's base level goes "L"
BLUE LED is turned on when Q11's base level goes "L"
Controls FM/AM tuner, the changer, CD/MD mechanism, Panel, volume and tone.
Controls the source, volume, tone and FM multiplex detector
Output 1.27V
Amplifies the front L/R and the rear L/R to 50W or 47W maximum.
4HPF&1Gain Controll
Power Supply for mp3
Power Suppil for 5V Pre Out
Controls logic for muting.
"L" when detection voltage goes below 3.6V or less.
Panel mecha control
The signal of IC2 is sent to Panel µcom
Power Supply for VFD
While BU is applied, BU5V AVR outputs +5V.
When Q4'base goes Hi, SW5V outputs +5V.
x ao u163
y
When Q5'2pin goes Hi, SW14V outputs 14V.
i
When Q6'2in goes Hi, A8V AVR outputs 8.0V.
When Q9'base goes Hi, S+B AVR outputs 7.5V.
2 9
8
Operation / Condition / Compatibility
Operation / Condition / Compatibility
Q Q
3 6 7 1 3 1 5
IN
Panel mecha
IN1 IN2
L L
L H
H L
H H
co
.
KDC-X679
9 4 2 8
0 5 8 2 9 9 4 2 8
WAIT
OPEN
CLOSE
STOP
m
9 9
9 9
3