Daewoo DSD-9255E, Service Manual

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18
CIRCUIT OPERATION MANUAL
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
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
PIN NO MARK DESCRIPTION CURRENT RIPPLE(MAX)
1 LNB A POWER INPUT OF LNB A
2 NC
3 5V(RF) 5V OF RF-AMP 20mA(TYP.) 20mVp-p
4 AGC AGC MONITORING
5 5V 5V OF 2’nd AMP & ZERO-IF IC 20mA(TYP.) 20mVp-p
6 GND
7 VT TUNING VOLTAGE 30V * 20mVp-p
8 I I SIGNAL MONITORING
9 Q Q SIGNAL MONITORING
10 5V POWER OF AGC AMP 10mA(TYP.) 20mVp-p
11 3.3V POWER OF FEC IC 200mA(MAX.) 20mVp-p
12 F22 22kHz OUTPUT(serial 100ohm)
13 1.8V PLL POWER of FEC IC 120mA(MAX.) 20mVp-p
14 RESET ACTIVE LOW(serial 2Kohm)
15 ERROR OUT ERROR OUTPUR(serial 100ohm)
16 FSTART FSTART(serial 100ohm)
17 VALID DATA VALID(serial 100ohm)
18 BCLK BYTE CLOCK(serial 47ohm)
19-26 D0-D7 DATA OUTPUT(serial 100ohm)
27 DATA I2C DATA(serial 100ohm)
28 CLOCK I2C CLOCK(serial 100ohm)