Kenwood GX-204KE Service Manual page 4

GX204KEF2/KHF2/LEF2
GX204REF2/SEF2
QQ
3 7 63 1515 0
Ref. No. Application / Function
Q141 Noise amplifier
Q142 Noise amplifier
Q143 Noise amplifier
Q221 Mute switch
Q222 Switch within the electric volume
Q223,224 Mute switch
Q301 Midpoint circuit discharge switch
Q303 Midpoint circuit discharge switch
Q304 Midpoint circuit discharge switch
Q331 Servo 8V power supply switch
Q332 Servo 8V power supply switch
Q333 Servo 8V power supply switch
Q351 Power supply switch for P-ANT
Q352 Power supply switch for P-ANT
Q353 Power supply switch for P-ANT
Q354 P-ANT short detection switch
Q371~373 DC offset detection switch
Q391 Audio8V power supply switch
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L 13942296513
Q392 Audio8V power supply switch
Q521 Current buffer for SYS_ON
Q522 Current buffer for SYS_OFF
Q523 Bus_OFF detection
Q524 Bus_ON detection
Q525 Hardware reset switch
Q526 Sie-Bus reset detection switch
Q551 AUX detection switch
Q601 Power supply switch for DC/DC45V
Q602 Power supply switch for DC/DC45V
Q603 Power supply switch for DC/DC45V
Q604~606 Switching for DC/DC45V power supply
Q621 Switch for filament power supply
Q622 Switch for filament power supply
Q623 Switch for filament power supply
Q624 Power supply switch for DC/DC45V
Q625 Power supply switch for DC/DC45V
Q626 Switch for filament power supply
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Q651 Switch for Bu5V power supply
Q652 Switch for Bu5V power supply
Q671 Switch for D5V power supply
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Q672 Switch for D5V power supply
Q673 Switch for D5V power supply
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COMPONENTS DESCRIPTION
Switches constant when noise is detected.
Noise detection output buffer
Switches constant when noise is detected.
Mute within the electric volume.
For switching FM/AM within the electric volume.
SRS-WOW mute
Discharges the midpoint voltage when ACC_OFF.
Detects P-ON for discharging midpoint voltage when ACC_OFF.
Discharges the midpoint voltage when ACC_OFF.
Detects P-ON for servo 8V.
Driver for servo 8V.
Darlington for servo 8V.
Detects Acc for P-ANT.
Driver for P-ANT.
Darlington for P-ANT.
Detects P-ANT short.
Detects DC offset voltage.
Detects P-ON for Audio8V.
Driver for Audio8V.
Outputs Hi when SYS_ON is Lo.
Outputs Hi when SYS_OFF is Lo.
Inputs Hi when Sie-Bus system is OFF.
Inputs Hi when Sie-Bus system is ON.
Outputs Lo when hardware reset is detected.
Outputs Hi when Sie-Bus reset is detected.
Outputs Hi when AUX is detected.
Detects DC/DC switch.
Driver for DC/DC45V power supply.
Darlington for DC/DC45V power supply.
For DC/DC45V power supply.
Detects DC/DC switch.
Driver for filament power supply.
Darlington for filament power supply.
Detects DC/DC switch.
Driver for DC/DC45V power supply.
Driver for filament power supply.
Driver for Bu5V power supply.
Darlington for Bu5V power supply.
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Detects P-ON for D5V power supply.
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Outputs Lo when AM.
Supplies D5V power supply when AM.
2 9
8
Operation / Condition / Compatibility
Q Q
3 6 7 1 3 1 5
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.
9 4 2 8
0 5 8 2 9 9 4 2 8
m
9 9
9 9