Haier HTVF20R72 Service Manual page 28

KEY
VOL
MUTE
VSSC/P
BAND1
BAND2
VSSA
SECPLL
VP2
DECDIG
PH2LF
PH1LF
GND3
DECBG
AVL/EWD
VDRB
VDRA
IFIN1
IFIN2
IREF
VSC
TUNER AGC
AUDEEM/SIFIN1 *1
DECSDEM/SIFIN2
GND2
SNDPLL/SIFAGC *1
AVL/SNDIF/REF0/
AMOUT *1
HOUT
FBISO
AUDEXT/QSSO/
AMOUT *1
EHTO
PLL IF
IFVO/SVO
VP1
CVBS INT
GND1
CVBS/Y
CHROMA
AUDOUT/AMOUT *1
INSSW2
R2/VIN
G2/YIN
6 Control keys input *3
7 Sound Volume control PWM output
8 Sound mute output
9 Digit ground for µ-controller core and periphery
10 Tuner Band selection output
11 Tuner Band selection output
12 Analog ground of teletext decoder and digital ground of TV-processor
13 SECAM PLL decoupling
nd
14 2 supply voltage TV-processor(+8V)
15 decoupling digital supply of TV-processor
16 Phase-2 filter
17 Phase-1 filter
18 Ground 3 for TV-processor
19 Band gap decoupling
20 Automatic volume leveling /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 Audio deemphasis or SIF input
29
decoupling sound demodulator or SIF input 2
30
ground 2 for TV processor
31
narrow band PLL filter or AGC sound IF
32
Automatic Volume Levelling / sound IF input / subcarrier reference output / audio
deemphasis
33
horizontal output
34
flyback input/sandcastle output
35
external audio output / QSS intercarrier out
36
EHT/overvoltage protection input
37 IF-PLL loop filter
38
IF video output / selected CVBS output
39
supply voltage TV processor
40
internal CVBS input
41
ground for TV processor
42
CVBS/Y input
43
C input
44 audio output /AM audio output (volume controlled)
45
2 RGB / YUV insertion input
nd
46
2 R input / V (R-Y) input / P
nd
47
2 G input / Y input
nd
Circuit Explanation
input
R