© 2003-7 PRINTED IN JAPAN
B53-0082-00 (N) 1424
SIRIUS SATELLITE RADIO TUNER
KTC-SR902
SERVICE MANUAL
Cord with plug
(E30-4291-05)
Mounting hardware
(J21-3801-04) X2
Magic tape
(H30-0051-05)
Screw set
(N99-1623-05)
Metallic cabinet
(A01-2826-02)
KTC-SR902
2
BLOCK
DIA
GRAM
AUDIO
DATA
FEEDBACK
(OPTION)
ANTENNA
F/E
A1
IC1
A/D
IC3
DBC
SDRAM
IC4
FLASH
IC2
D/A
IC7
u-COM
IC6
ROM
SW. AMP
IC8
J6
J1
J3
ISO-AMP
J2
IC9
to CONT
to H/U
RCA
to CD-CH
RECEIVE SIGNAL
CLOCK
CONTROL
A2
CONTROLLER 6.6V
ANTENNA 8V
ANALOG 3.3V
AUDIO 8V
BACKUP 5V
D/A 5V
DIGTAL 3.3V
DIGTAL 1.5V
DIGTAL 5V
Q6
L10
Q7
SW
SW
CONTROL
IC11
SW
Q7
D3,C175
D4,C174
D5,C173
IC20
IC13
IC14
R285
R273
R285
D17,L9
IC12
POWER SUPPLY BLOCK
60MHz
60MHz
12.288MHz
12.288MHz
CURRENT DETECT, OK ; 50-250mA
for DROP VOLTAGE
STANDBY : 5V
KTC-SR902
3
DIGITAL TUNER UNIT (X14-9330-10)
Ref. No.
Application / Function
Operation / Condition / Compatibility
IC1
AD converter
Analog to digital converter from A1 (Tuner module).
IC2
16M flash memory
For 4 seconds delay (TDM1).
IC3
Decode
Down convert, De-mapping, AFC, Combining of three signals, De-interleaver, Viterbi/RS decode and
Audio decode, with ESN.
IC4
128M SDRAM
For 4 seconds-delay.
IC5
Buffer
3.3V to 5V signal level converter.
IC6
µ-com
IC7
D/A converter
Audio D/A converter (I2S).
IC8
SW op-amp
SW op-amp and LPF system for 2 audio signals.
IC9
Op-amp
Audio isolate with CD-CH.
IC10
Op-amp
Convert for audio bias circuit.
IC11
DC/DC converter control
Power supply for antenna 8V and digital 5, 3.3, 1.5V.
IC12
8V regulator
Power supply for audio system.
IC13
5V regulator
Power supply for BU 5V.
IC14
3.3V regulator
Power supply for A1 (Tuner module) and IC1.
IC15
Reset IC
IC20
5V regulator
Power supply for D/A converter (IC7).
Q1
SW
For main power supply SW.
Q2
SW
For reset.
Q3
SW
For B.U detect.
ON : Detect
Q4
Inverter
For B.U detect mute.
Q5
SW
For B.U detect.
ON : No detect
Q6
DC/DC converter
For antenna 8V, digital 5V, 3.3V power supply.
Q7
SW
For main power supply SW.
Q8
DC/DC converter
For digital 1.5V power supply.
Q9
Mute
For right mute.
Q10
Mute
For left mute.
Q11
SW
For mute.
ON : Mute
Q12
SW
For 5L CH-CON signal.
Q17
SW
For CD-CH reset.
COMPONENTS DESCRIPTION
KTC-SR902
4
MICROCONTROLLER IC : 703030BGC035 (X14-933 : IC6)
Pin No.
Name
I/O
Function
1DATA_O
O
Data output to outside driver IC.
2
LCD_CLK
O
Clock output to outside driver IC.
3RXI
UART input.
4TXO
UART output.
5NCO
Not connect.
6
EVDD
-
Power supply for port.
7
EVSS
-
Ground for port.
8,9
NC
O
Not connect.
10
MUTE1
O
5L I/F to H/U.
11
REQC1
O
5L I/F to H/U.
12
MDI
I
Data input from IC3.
13
MDO
O
Data output to IC3.
14
SCK
O
Data clock output to IC3.
15
LCD_CE
O
Chip enable for outside driver IC.
16
LCD_RST
O
Reset for outside driver IC.
17
NC
O
Not connect.
18
IC/VPP
I
For write program enable.
H : Write mode, L : Normal
19
RELAY
O
Audio source selection.
H : Sirius, L : CD-CH
20
A_MUTE
O
Audio mute output.
H : Normal, L : Mute on
21
PON_M
O
Output for power on main.
H : Power on, L : Power off
22
PON_A
O
Output for power on audio.
H : Power on, L : Power off
23
NC
O
Not connect.
24
DIS
I
Disenable signal input from CN3.
25
DAP_RST
O
IC9 reset output.
H : Not reset, L : Reset
26
SSN
O
Enable signal output to IC3.
27~30
NC
O
Not connect.
31
RESET
I
H : Not reset, L : Reset
32
NC
I
Not connect.
33,34
NC
-
Not connect.
35
X2
-
Crystal for main clock.
36
X1
I
Crystal for main clock.
37
VSS
-
Ground.
38
VDD
-
Power supply.
39~48
NC
O
Not connect.
49
MODE#0
I
Mode signal select.
00 : Normal, 10 : Error invalid, 11 : TA mode
50
MODE#1
I
51
DAC_RST
O
IC7 reset output.
52~54
NC
O
Not connect.
55
BVDD
-
Power supply for BUS interface.
MICROCOMPUTER'S TERMINAL DESCRIPTION
KTC-SR902
5
Pin No.
Name
I/O
Function
56
BVSS
-
Ground for BUS interface.
57~63
NC
O
Not connect.
64
CDT
O
Data output to IC7.
65
CCLK
O
Clock output to IC7.
66
DA_CSN
O
Chip enable to IC7.
67
DIT_CSN
O
Chip enable to IC18.
68
(MUTE)
I
(Mute signal input)
69
REQH2
O
5L I/F to CD_CH.
70
CHCON2
O
5L I/F to CD_CH.
71
AVDD
-
Analog power supply.
72
AVSS
-
Analog ground.
73
AVREF
I
Analog reference voltage.
74
SENCE REF
I
Antenna level sence reference voltage.
75
ANT SENCE
I
Antenna level sence voltage.
76~85
NC
I
Not connect.
86
NC
O
Not connect.
87
BUP1
I
Back-up voltage detect (low).
H : Not detect (OK), L : Detect
88
KEY_INT
I
Request from outside driver IC.
89
CHCON1/STBY
I
5L I/F from H/U.
90
BUP2
I
Back-up voltage detect (high).
H : Detect, L : Not detect (OK)
91
REQC2
I
5L I/F from CD_CH.
92
REQH1
I
5L I/F from H/U.
93
REMO
I
Data input from remote control.
94
DATAC2
I
5L I/F from CD_CH.
95
DATAH2
O
5L I/F to CD_CH.
96
HCLK2
O
5L I/F to CD_CH.
97
DATAH1
I
5L I/F from H/U.
98
DATAC1
O
5L I/F to H/U.
99
HCLK1
I
5L I/F from H/U.
100
DATA_I
I
Input from outside driver IC.
MICROCOMPUTER'S TERMINAL DESCRIPTION