- 2 -
EN-1187E
3. Check for safety after repair.
Check that the screws, parts and wires are put back se-
curely in their original position after repair. Ensure for safety
reasons there is no possibility of secondary ploblems
around the repaired spots.
If extended damage is caused due to negligence of repair,
the legal responsibility shall be with the repairing company.
4. Caution in removal and making wiring connection to the
parts for the automobile.
Disconnect the battery terminal after turning the ignition
key off. If wrong wiring connections are made with the bat-
tery connected, a short circuit and/or fire may occur. If ex-
tensive damage is caused due to negligence of repair, the
legal responsibility shall be with the repairing company.
5. Cautions regarding chips.
Do not reuse removed chips even when no abnormality is
observed in their appearance. Always replace them with
new ones. (The chip parts include resistors, capacitors,
diodes, transistors, etc). The negative pole of tantalum
capacitors is highly susceptible to heat, so use special care
when replacing them and check the operation afterwards.
6. Cautions in handling flexible PWB
Before working with a soldering iron, make sure that the
iron tip temperature is around 270 . Take care not to ap-
ply the iron tip repeatedly(more than three times)to the
same patterns. Also take care not to apply the tip with force.
7. Turn the unit OFF during disassembly and parts replace-
ment. Recheck all work before you apply power to the unit.
EXPLANATION OF IC
051-4611-90
AD8131ARM
High-Speed Differential Driver
pin
5: F TEST OUT 14: O : Configurable Functional Test Output
pin
6: F TEST OUT 15: O : Configurable Functional Test Output
pin
7: VDD
: - : 2.5V Positive Supply Voltage
pin
8: VDD 3
: - : 3.3V Positive Supply Voltage
pin
9: VSS
: - : Digital Ground
pin 10: Tref M
: - : Terrestrial ADC Reference Negative Volt-
age
pin 11: Tref P
: - : Terrestrial ADC Reference Positive Voltage
pin 12: T ADCref
: - : Analog terminal. Terrestrial ADC Reference
Adjust (external resistor to determine Ipol)
pin 13: T IN C M
: O : Analog output. Terrestrial ADC Internal
Common-Mode output for bypassing
pin 14: IF 2 TA P
: IN : Analog input. Terrestrial 2nd IF Differential
Input - Positive
pin 15: IF 2 TA N
: IN : Analog input. Terrestrial 2nd IF Differential
Input - Negative
pin 16: TV CMO
: - : Analog terminal. Terrestrial ADC Internal
Common Mode (filtered)
pin 17: A VDD
: - : 2.5V Analog Positive Supply Voltage
pin 18: A GND
: - : Analog Ground
pin 19: SV CMO
: - : Analog terminal. Satellite ADC Internal
Common Mode (filtered)
pin 20: IF 2 SA N
: IN : Analog input. Satellite 2nd IF Differential
Input - Negative
pin 21: IF 2 SA P
: IN : Analog input. Satellite 2nd IF Differential
Input - Positive
pin 22: S IN CM
: O : Analog output Satellite ADC Internal Com-
mon-Mode output for bypassing
pin 23: S ADCref
: - : Analog terminal. Satellite ADC Reference
Adjust (external resistor to determine Ipol)
pin 24: Sref P
: - : Satellite ADC Reference Positive Voltage
pin 25: Sref M
: - : Satellite ADC Reference Negative Voltage
pin 26: A VDD
: - : 2.5V Analog Positive Supply Voltage
pin 27: A GND
: - : Analog Ground
pin 28: M Reset
: IN : Master reset
pin 29: T AGC
: O : Terrestrial AGC Control Signal
pin 30: S AGC
: O : Satellite AGC Control Signal
pin 31: VSS
: - : Digital Ground
pin 32: XTO
: O : XTAL Output
pin 33: M CLK / XTI
: IN : XTAL Input or Master Clock Input
pin 34: ADC SEL
: IN : Selection between Internal or External ADC
0=Internal
pin 35: M CLK O
: O : Master Clock Output
pin 36: M CLK O N
: O : Inverted Master Clock Output
pin 37: LOCK S 1
: O : Satellite Dem1 Lock Indicator
pin 38: LOCK S 2
: O : Satellite Dem2 Lock Indicator
pin 39: VDD 3
: - : 3.3V Positive Supply Voltage
pin 40: VDD
: - : 2.5V Positive Supply Voltage
pin 41: VSS
: - : Digital Ground
pin 42: IF 2 TD 9
: IN : Terrestrial 2nd IF Digital Input
pin 43: IF 2 TD 8
: IN : Terrestrial 2nd IF Digital Input
pin 44: IF 2 TD 7
: IN : Terrestrial 2nd IF Digital Input
pin 45: IF 2 TD 6
: IN : Terrestrial 2nd IF Digital Input
pin 46: IF 2 TD 5
: IN : Terrestrial 2nd IF Digital Input
pin 47: IF 2 TD 4
: IN : Terrestrial 2nd IF Digital Input
pin 48: IF 2 TD 3
: IN : Terrestrial 2nd IF Digital Input
pin 49: IF 2 TD 2
: IN : Terrestrial 2nd IF Digital Input
pin 50: IF 2 TD 1
: IN : Terrestrial 2nd IF Digital Input
pin 51: IF 2 TD 0
: IN : Terrestrial 2nd IF Digital Input
pin 52: F TEST EN
: IN : Functional Test Enable (1=enable)
pin 53: INTR
: O : Interrupt
pin 54: VSS
: - : Digital Ground
pin 55: VDD
: - : 2.5V Positive Supply Voltage
pin 56: CLK D
: O : Divided Master Clock
pin 57: NC
: - : Not Connected. Reserved for Future Use.
pin 58: IF 2 SD 7
: IN : Satellite 2nd IF Digital Input
pin 59: IF 2 SD 6
: IN : Satellite 2nd IF Digital Input
pin 60: IF 2 SD 5
: IN : Satellite 2nd IF Digital Input
pin 61: IF 2 SD 4
: IN : Satellite 2nd IF Digital Input
pin 62: IF 2 SD 3
: IN : Satellite 2nd IF Digital Input
pin 63: IF 2 SD 2
: IN : Satellite 2nd IF Digital Input
pin 64: IF 2 SD 1
: IN : Satellite 2nd IF Digital Input
1
2
3
4
+Din
N.C.
V-
-Out
-Din
Vocm
V+
+Out
8
7
6
5
75
75
1.5k
1.5k
051-6390-00
STA400
CHANNEL DECODER
DESCRIPTION
STA400 Channel Decoder integrates all the functions to demodulate and
decode the incoming satellite and terrestrial signals after the RF Front-
End down-convertion:
. Analog-to-Digital conversions
. Satellite and terrestrial demodulation
. AGC
. Frame synchronization and demultiplexing
. Viterbi decoding
. Time and spatial diversity combining
. Reed-Solomon decoding and deinterleaving
. Prime Rate Channel (PRC) demultiplexing
. Payload Channel (PC) selection
At the end of the demodulation and decoding processes a configurable
serial data stream is made available to STA450, the Service/Source
Decoder, via the PC Bitstream interface.
Terminal Description
pin
1: F TEST OUT 10: O : Configurable Functional Test Output
pin
2: F TEST OUT 11: O : Configurable Functional Test Output
pin
3: F TEST OUT 12: O : Configurable Functional Test Output
pin
4: F TEST OUT 13: O : Configurable Functional Test Output