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Kenwood KTC-SR901 Service Manual page 3

Sirius satellite radio tuner
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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
www
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

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