NEC DTE-25G5THS Service Manual page 17

Service Manual CP-785A
PINNING
SYMBOL
n.u.
SCL
SDA
SECAM L
out
OCP
RF AGC in
Key-in
S/SW
VssC/P
LED 1
LED 2
VSSA
SEC PLL
VP2
DECDIG
PH2LF
PH1LF
GND3
DECBG
AVL/EWD
VDRB
VDRA
IFIN1
IFIN2
IREF
VSC
TUNERAGC
SIFIN1
SIFIN2
GND2
SIF AGC
REF0
HOUT
FBISO
QSS out
EHT0
PLLIF
IFVO
VP1
CVBSINT
GND1
CVBS/Y
CHROMA
AMOUT
INSSW2
R2IN
PIN
1 Port 1.3 Not used.
2 I2C bus clock line
3 I2C Data line
4 Port 2.0 : High when L
5 Port 3.0 : Over Current Protection
6 ADC 1 : For factory use only ( High impedance )
7 ADC 2 : local key input ( High impedance )
8 ADC 3 : Scart Slow switching input
9 digital ground for -controller core and peripheral
10 port 0.5 ( 8mA current sinking capability )
11 port 0.6 ( 8mA current sinking capability )
12 analog ground of teletext decoder and digital ground of TV processor
13 SECAM PLL decoupling
14 2nd supply voltage TV-processor
15 decoupling digital supply of TV-processor
16 phase-2 filter
17 phase-1 filter
18 ground 3 for TV-processor
19 bandgap decoupling
20 East / West drive output
21 vertical drive B output
22 vertical drive A output
23 IF input 1
24 IF input 2
25 reference current input
26 vertical sawtooth capacitor
27 tuner AGC output
28 SIF input 1
29 SIF input 2
30 ground 2 for TV processor
31 AGC sound IF
32 n.u.
33 horizontal output
34 flyback input / sandcastle output
35 QSS intercarrier output
36 EHT/Overvoltage protection
37 IF PLL loop filter
38 IF video output
39 main supply voltage TV-processor
40 internal CVBS input
41 ground 1 for TV-processor
42 external CVBS/Y input
43 chrominance input (SVHS)
44 n.u.
45 2nd RGB insertion input
46 2nd R input
DESCRIPTION
selected (PushPull )
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