Haier 5115DVD Service Manual page 19

7:Circuit Explanation
Microprocessor and Small signal processing: super monolithic integrated circuits ： 8377
8377 is super large integrated circuit decoder, containing intermediate image amplifying,
intermediate sound amplifying, horizontal and vertical scan, small signal processing,
color decoding, hi-pressure tracing and over-load protection, I
introducing functions and testing data for maintenance is listed in Table 1.
1. N501 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
GND1
CVBS/Y
CHROMA
AUDOUT
INSSW2
R2/VIN
G2/YIN
B2/UIN
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
41 ground for TV processor
42 CVBS/SVHS(Y) input
43 SVHS (C) input
44 Audio output
45 YUV insertion input
46 R input / V (R-Y) input / PR input
47 G input / Y input
48 B input / U (B-Y) input / PB input
DESCRIPTION
19
2
C bus control.Information