Daewoo DSD-9251MA, Service Manual

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18
CIRCUIT OPERATING MANUAL
* The functions of individual Pin.
PIN NAME PIN No.PIN DESCRIPTION
LNB POWER B 1 LNB Voltage supply. To put 1000PF of ceramic capacitor into ground.
LNB POWER A 2 LNB Voltage supply. To put 1000PF of ceramic capacitor into ground.
A-GND 3,6 GND. Please don t let any Digital Noise enter through ground.
B1 4 5V Supply for RF Amp TR
B2 5 5V Supply for ZERO-IF chip(for RF)
B3 6 5V Supply for ZERO-IF chip(for PLL)
A/S 8 I
2
C Bus Address selection input (See table 3)
T/M 9 Tuning voltage monitor (Do not connect it to anywhere)
30V) 10 PLL channel select voltage supply (+30V)
B4 11 5V supply for AGC pull-up
NRES 12 Reset, active at low level.
AUX_CLK 13 Programmable Output Port or Programmable Output Clock
F22/DiSEqC 14 DiSEqC modulation (22kHz Tone), Programmable Output Port
SCL 15 I 2 C Bus
SDA 17
N.C 16 Do not connect it to anywhere
BCLK OUT 18 Output Byte Clock; or Bit Clock in Serial Mode.
N.C 19 Do not connect it to anywhere
DO,....,D7 20~27 Output Data : D7 is DATA_OUT in Serial Mode.
N.C 28 Do not connect it to anywhere
D/P 29 Data/Parity Signal.
ERROR 30 Output Error Signal. Set in case of uncorrectable packet.
STR OUT 31 Output 1st byte Signal (synchro byte clock)
VDD 32 +3.3V Supply for LINK IC
Chart 5. Tuner Module Pin Out
Data Parity
No Error Uncorrectible Packet No Error
BYTE CLK
P A C K E T
STR OUT
E R R O R
BY T E D A T A
Feature 11. Parallel Data Output Timing
TS Output is made by the Serial or Parallel function.
The relationship between TS output Data and Control signal is showing in the following diagram. If an error occurs Data is
ignored, and the Data in the Valid area is valid.
Parallel Output Timing