BBK DV725SI, Руководство по обслуживанию, Страница: 35 / 115

(3) SCART terminal function selection is shown as the following table:
Note: PDAT0 and PDAT2 are used to control input voltage of pin 8 of SCART terminal; PDAT1 is
used to control voltage change of pin 16 of SCART terminal and the voltage on pin 16 controls SCART
terminal to select RGB mode or CVBS mode.
3.2.14 MIC circuit
1. MIC circuit block diagram is shown as in the following figure 3.2.14.1:
(2) SCART terminal pin function is shown as the following table:
Pin Name
Signal
direction
Function description Pin Name
Signal
direction
Function description
1 A(B)OUT I Audio right channel input 12 NC
Network communication data
line 2
2 A(B)IN O Audio right channel output 13 RETURN Pr signal ground
3 A(A)OUT I Audio left channel input 14 RETURN Blanking signal ground
4 A-COM Audio signal ground 15 RED I/O I/O Pr signalI/O port
5 RETURN Pb signal ground 16 BLK I/O I/O Blanking signal I/O port
★
6 A(A)IN O Audio left channel output 17 RETURN Blanking signal ground
7 BLUE I/O I/O Pb signalI/O port 18 TRTURN Composite video signal ground
8 FUNCSW I Function selection jack 19 V-OUT I Composite video signal input
9 RETURN Y1 signal ground 20 V-IN O Composite video signal output
10 CONT I/O
Network communication
data line 2
21 GND Common
11 GREEN I/O I/O Y1 signal I/O port
PDATO PDAT1 PDAT2 Pin 8 of SCART terminal Function
0 × 0 10V AV4:3
0 × 1 7.5V AV16:9
1 × 0 0.90V TV
1 × 1 0.85V TV
× 0 × × CVBS MODE
× 1 × × RGB MODE
Figure 3.2.14.1 MIC circuit block diagram
U401 amplifying
MIC
U401 amplifying
TO MPEG
XS601
Voltage regulating circuit
+5V
TO U603
OK
-9V
+9V
DET
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