Videocon Mstar MST719, Mstar MST719DU, Руководство по обслуживанию

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MST719 Service Manual
21
2). Pins function description
Pin
Number SYMBOL DESCRIPTION
1
VIF1 VIF differential input 1
2
VIF2 VIF differential input 2
3
OP1 Output port 1; open-collector
4
FMPLL FM-PLL for loop filter
5
DEEM de-emphasis output for capacitor
6
AFD AF decouping input for capacitor
7
DGND Digital ground
8
AUD Audio output
9
TOP Tuner AGC TakeOver Point (TOP) for resistor adjustment
10
SDA I2C-bus data input and output
11
SCL I2C-bus clock input
12
SIOMAD Sound intercarrier output and MAD select with resistor
13
n.c Not connected
14
TAGC Tuner AGC output
15
REF 4 MHz crystal or reference signal input
16
VAGC VIF-AGC for capactior
17
CVBS Composite video output
18
AGND Analog ground
19
VPLL VIF-PLL for loop filter
20
Vp Supply voltage
21
AFC AFC output
22
OP2 Output port 2; open-collector
23
SIF1 SIF differential input 1 and MAD select with resistor
24
SIF2 SIF differential input 2 and MAD select with resistor