Electric Unit (X34-3080-14) - Kenwood ez500 Service Manual

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ELECTRIC UNIT (X34-3080-14)

Ref. No. Application / Function
System µ-COM
IC1
IC2 E.Vol & N.C.MPX
IC3 Power Supply IC
IC4 Power IC
IC6 Muting logic IC
IC8 Reset IC
IC9 SW Regulator
Q1 Serge Detection
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L 13942296513
Q2 BACK-UP Detection
Q3 ACC Detection
Q4 SW 5V
Q21 Servo Regulator
Q22 Servo SW
Q23 Control Power Supply IC
Q31 Dimmer Control
Q32 EXT.AMP Control
Q41 SW Regulator Control
Q151 DSI Driver
Q152 Panel 5V SW
Q153,154 ILL Control
Q201 Noise buffer
Pre and NF Mute SW
Q350
(not always Pre and NF)
Q351 Pre / NF Mute SW
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Q352 Pre / NF Mute SW
Pre and NF Mute SW
Q354
(not always Pre and NF)
.
Q355 Pre Mute SW
Q356 Pre Mute SW
COMPONENTS DESCRIPTION
Controls FM/AM tuner, the changer, CD mechanism, Panel, volume and tone.
Controls the source, volume, tone and FM multiplex detector.
Bu5V (5V), Audio8V (8V), FM+B (8V), AM+B (8V), P-CON, ANT-CON
SW1
1.5~3.0
3.5~5.0
7.0~
SW2
2.0~3.0
4.0~
Amplifies the front L/R and the rear L/R to 50W maximum.
Controls logic for muting.
"L" when detection voltage goes below 3.6V or less.
Power Supply for MP3
"L" when the back-up voltage becomes more than 24V (momentary power down).
"H" when the back-up voltage becomes less than 24V.
"L" when B.u is present.
"H" when B.u is absent or momentary power down is detected.
"L" when Acc is present.
ON when the base is "L".
Dimmer ON when the base is "H".
Controls Ext.AMP by pulse width.
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.
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.
ILL lights when the base of Q153 is "H".
Drives the Pre and NF Mute sw (Q351,355) when the base is "L".
Mutes the Pre Rear Lch or NF Lch when the base is "H".
Mutes the Pre Rear Rch or NF Rch when the base is "H".
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y
Drives the Pre and NF Mute sw (Q352,356) when the base is "L".
i
Mutes the Front Lch when the base is "H".
Mutes the Front Rch when the base is "H".
2 9
8
Operation / Condition / Compatibility
OUT
Audio ON
Audio P-CON ON
Audio P-CON, P-ANT ON
OUT
ILL FM ON
ILL AM ON
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EZ500
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