Circuit Explanation; Stand By Output - Haier HTAF21C Service Manual

5．CIRCUIT EXPLANATION
1. N201 UOC TDA8377
SYMBOL

STAND BY output.

SCL
SDA
TUNING
KEY
SYSTEM
VOL
MUTE
VSSC/P
CTL
STANDBY
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
HOUT
FBISO
AUDEXT
EHTO
PLL IF
IFVO/SVO
VP1
CVBS INT
PIN
1 In STAND BY mode, low level (Power OFF).
For Power ON this pin will be high.
2
2 I C-bus clock line
2
3 I C-bus data line
4 tuning Voltage (Vt) PWM output
5 Control keys input
6 TV system control
7 Sound Volume control PWM output
8 Sound mute output
9 Digit ground for μ-controller core and periphery
10 DVD power control
11 STANDBY control
12 Analog ground of digital ground of TV-processor
13 Internally connected
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 levelling
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 deemphasize or SIF input
29 Decoupling sound demodulator
30 Ground 2 for TV processor
31 Narrow band PLL filter
32 Automatic Volume Levelling
33 Horizontal output
34 Flyback input/sandcastle output
35 External audio output
36 EHT/over voltage protection input
37 IF-PLL loop filter
38 IF video output / selected CVBS output
39 supply voltage TV processor
40 internal CVBS input
DESCRIPTION
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