Kenwood KRC-666, Руководство по обслуживанию

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KRC-666/G/R
4
COMPONENTS DESCRIPTION
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SWITCH UNIT (X16-2030-21)
Ref. No Purpose
¡
Function Operation/Condition/Compatibility
IC1 LCD driver Drives LCD
IC2 Remote control IC Controls the unit
Q1,Q4 REMO ON switch The power supply of IC2 is turned on when base level goes "L"
●
SYNTHESIZER UNIT (X14-9180-2x)
Ref. No Purpose
¡
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.
IC3 Power supply IC BU5V(5V) Audio8V(8V) FM+B(8V)
AM+B(8V) P-CON ANT-CON
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).
IC11 Sub motor driver Sub motor control
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.
Q4 SW 5V ON when the base is "L".
Q5 Power-antenna detection "H" when P-ANT output is short-circuit(P.ANT OFF).
"L" when FM/AM signal does not exist.
Q6 P-CON detection "H" when P-CON output is short-circuit.
Q51 Main motor switch 1 Outputs 14V when the base is "L".
Q52 Main motor switch 2 Q51 turns ON when the base is "H" .
Q53 Sub motor AVR Output 3.6V when the base of Q4 is "L".
Q54 MSTC switch ON when the base is "H" .
Q101 Composite signal buffer
Q151 DSI driver DSI lights when the base is "L".
DSI turns off when the base is "H" .
DSI turns on and off when panel is taken off.
Q152 Panel 5V switch When the panel is attached, the base goes "L", turning the Tr ON to supply 5V
to the panel. When panel is taken off, panel 5V cut off.
Q201 Noise buffer
Q350 Pre mute switch Drives the pre mute switch (Q351~354) when the base is "L".
Q351 Pre mute switch Mutes the rear Lch when the base is "H".
Q352 Pre mute switch Mutes the rear Rch when the base is "H".
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-CONP-CON
0V OFF OFF
2.5V OFF ON
5V ON ON
IN OUT
IN SUB MOTOR
IN1(–) IN2(+)
L L STOP
L H CW
H L CCW
H H STANBY
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