Principle Ics - Hyundai H-LCD2004 Service Manual

10 .Principle ICS

A. ICs functional description
TDA93XX
SYMBOL
P1.3
SCL
SDA
P2.0
SCART_DET
KEY
P3.2
P3.3
VSSC/P
P0.5
P0.6
VSSA
SECPLL
VP2
DECDIG
PH2LF
PH1LF
GND3
DECBG
AVL
VDRB
VDRA
IFIN1
IFIN2
IREF
VSC
TUNER AGC
AUDEEM
DECSDEM
GND2
SNDPLL
REF0
HOUT
FBISO
Function: TV signal processor with embedded μ-Controller
PIN
1 3 Wires serial bus chip select, active high
2 I C-bus clock line
2
3 I C-bus data line
2
4 Audio mute
5 SCART SW input, active high
6 Control keys input *3
7 Panel power supply control, active high
8 Standby output, active high
9 Digit ground for µ-controller core and periphery
10 Red LED input
11 Blue LED input
Analog ground of teletext decoder and digital ground of
12
TV-processor
13 SECAM PLL decoupling
14 2 supply voltage TV-processor(+8V)
nd
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
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
29
Decoupling sound demodulator or SIF input 2
30
Ground 2 for TV processor
31
Narrow band PLL filter
32 Subcarrier reference output
33
Horizontal output
34
flyback input/sandcastle output
DESCRIPTION
14