Vivax TV-2104, Service Manual

Page: 22 / 31

SERVICE MANUAL
20
P0.5 10 port 0.5 (8 mA current sinking capability for direct drive of LEDs)
P0.6/CVBSTD 11
port 0.6 (8 mA current sinking capability for direct drive of LEDs)
or
Composite video input. A positive-going 1V(peak-to-peak) input is required
VSSA 12 digital ground of TV-processor
SECPLL 13 SECAM PLL decoupling
VP2 14 2
n d
supply voltage TV-processor (+8V)
DECDIG 15 supply voltage decoupling of digital circuit of TV-processor
PH2LF 16 phase-2 filter
PH1LF 17 phase-1 filter
GND3 18 ground 3 for TV-processor
DECBG 19 bandgap decoupling
AVL/EWD
( 1 ) 20 Automatic Volume Levelling (90versions)/ E-W drive output (110versions)
VDRB 21 vertical drive B output
VDRA 22 vertical drive A output
IFIN1 23 IF input 1
IFIN2 24 IF input 2
IREF 25 reference current input
VSC 26 vertical sawtooth capacitor
AGCOUT 27 tuner AGC output
SIFIN1/AUDEEM
( 2 )
28 SIF input 1 / audio deemphasis
SIFIN2/DECSDEM
( 2 )
29 SIF input 2 / decoupling sound demodulator
GND2 30 ground 2 for TV processor
SNDPLL/SIFAGC
( 2 )
31 narrow band PLL / AGC sound IF
AVL/REF0/SNDIF/
AMOUT
( 2 )
32
Automatic Volume Levelling / subcarrier reference output / sound IF input /
AM output
HOUT 33 horizontal output
FBISO 34 flyback input/sandcastle output
QSSO/AMOUT/
AUDEXT
(2)
35 QSS intercarrier output / AM output / external audio input
EHTO 36 EHT/overvoltage protection input
PLLIF 37 IF-PLL loop filter
IFVO/SVO/DVBO
( 2 ) 38 IF video output / selected CVBS output / DVB output (QFP-80)
VP1 39 main supply voltage TV processor
CVBS1 40 internal CVBS input
GND 41 ground for TV processor
CVBS3/Y 42 CVBS3/Y input
C 43 chroma input
AUDOUT / AMOUT
(2) 44 audio output / AM audio output (volume controlled)
INSSW2 45 2
n d
RGB / YUV insertion input
R2/V/P
R
-IN 46 2
n d
R input / V (R-Y) input / P
R
input
G2/Y-IN 47 2
n d
G input / Y input
B2/U/P
B
-IN 48 2
n d
B input / U (B-Y) input / P
B
input
BCLIN 49 beam current limiter input
BLKIN 50 black current input / V-guard input
RO 51 Red output
GO 52 Green output
BO 53 Blue output
VDDA 54 analog supply of Teletext decoder and digital supply of TV-processor (3.3 V)
VPE 55 OTP Programming Voltage
VDDC 56 digital supply to core (3.3 V)
OSCGND 57 oscillator ground supply
XTALIN 58 crystal oscillator input
XTALOUT 59 crystal oscillator output
RESET 60 reset
VDDP 61 digital supply to periphery (+3.3 V)
P1.0/INT1 62 port 1.0 or external interrupt 1 input
P1.1/T0 63 port 1.1 or Counter/Timer 0 input
P1.2/INT0 64 port 1.2 or external interrupt 0 input
P1.3/T1 1 port 1.3 or Counter/Timer 1 input
P1 .6/SCL 2 port 1.6 or I
2
C-bus clock line
P1 .7/SDA 3 port 1.7 or I
2
C-bus data line
P2.0/TPWM 4 port 2.0 or Tuning PWM output
P3.0/ADC0/PWM0 5
port 3.0 or ADC0 input or PWM0 output