Kenwood KTC-SR901 Service Manual page 3

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Ref.No. Element/Function
IC11 1M SRAM
IC12 8V Regulator
IC13 AVR
IC14 3.3V Regulator
IC15 5V Regulator
IC16 5V Regulator
IC17 DC/DC Converter
IC18 DC/DC Converter
IC19 2.5V Regulator
IC22 Op-amp
IC23 D/A Converter
IC24 SW Op-amp
IC25 Op-amp
IC30 3-state buffer
IC31 Reset ic
IC32 EEPROM
IC33 Comparator
IC34 Comparator
IC35 5V Regulator
Q1, 2 SW
TE
L 13942296513 Q3 AVR
Q10, 11 SW
Q12 DC/DC Converter
Q13 DC/DC Converter
Q14 SW
Q15 SW
Q17 Mute
Q18 Mute
Q19 Inverter
Q21 Inverter
Q50 SW
Q51 SW
D1, 5 Diode
D10, 11 Schottky barrier diode
D19 Diode
D20 Diode
D21, 22 Diode
D23 Diode
D24, 25 OR gate
D30 Rectifier diode
D35, 36 Zenner diode
D37 OR gate
D38 Diode
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D39-43 Zenner diode
D44 Diode
D45 Rectifier diode
.
D46 Diode
D47 Zenner diode
D50, 51 Zenner diode
COMPONENTS DESCRIPTION
External RAM for IC9
Power supply for audio system
Power supply for antenna
Power supply for A1 (tuner module)
Power supply for D/A converter (IC23)
Power supply for A/D converter (IC2)
Power supply for digital 3.3V
Power supply for digital 5V
Power supply for digital 2.5V
Convert for audio bias circuit
Audio D/A converter (I2S)
SW op-amp and LPF system for 2 audio signals
Audio isolate with CD-CH
3.3V / 5V signal level converter
Memory
For BU detect
For antenna detect
Power supply for BU 5V
For audio power supply SW
For antenna 8V power supply
For power supply SW
For digital 3.3V power supply
For digital 5V power supply
For audio out source select
For mute
For left mute
Forright mute
For reset
For 5L ch-con signal
For B.U detect
For B.U detect mute
Protect for wrong connection
For DC/DC converter
For reset
For AVR
Protect for irregularly voltage input
Divider for left and right mute circuit
For mute
For reset signal
Protect for irregularly voltage input
For mute
Divider for reset signal
Protect for irregularly voltage input
x ao u163
y
Reference voltage for regulator
For B.U 5V
i
Protect for wrong connection
Reference voltage for mute circuit
For B.U voltage detect
2 9
8
Operation/Condition
Q Q
3 6 7 1 3 1 5
On ; CD-CH / Off ; Sirius
On ; Mute
On ; Detect
On ; Mute
co
.
KTC-SR901
9 4 2 8
0 5 8 2 9 9 4 2 8
m
9 9
9 9
3