Ics Functional Description - Akai 21CTU91BC Service Manual

ICs functional description

UOC TDA11105-XXXX/TDA11106-XXXX
SYMBOL
IF VO
VP2
VCC AUDIO
PLL IF
GND2
DECSDEM
FMDEMOUT
EHTO
AGC
IREF
VSC
IF IN2
IF IN1
VDRA
VDRB
AVL/EW
DECBG
SECPLL
GND1
PH1LF
PH2LF
VP1
DECDIG
XTALOUT
XTALIN
IR
MUTE
TILT/UHF
KEY
BAND2
BAND1
TUNING
VDDP
SDA
SCL
AV1
AV2
STANDBY
50/60
PIN
1
IF video output / selected CVBS output
ND
2 2 Supply voltage TV processor(+5v)
3 8 volt supply for audio switches(+5V~8V)
4
IF-PLL loop filter
5 Gaound 2 for TV processor
6
decoupling sound demodulator or SIF input 2
7
audio output /AM audio output (volume controlled)
8
EHT/overvoltage protection input
9 Tuner AGC output
10 Reference current input
11 Vertical sawtooth capacitor
12 IF input 1
13 IF input 2
14 Vertical drive A output
15 Vertical drive B output
16 Automatic volume leveling /EAST-WEST drive output
17 Band gap decoupling
18 SECAM PLL decoupling
19 Ground 1 for TV-processor
20 Phase-1 filter
21 Phase-2 filter
st
22 1 supply voltage TV-processor(+5V)
23 decoupling digital supply of TV-processor
24
crystal oscillator output
25
crystal oscillator input
26
Remote control signal input.
27 Sound mute output
28
29 Control keys input *3
30 Tuner Band selection output
31 Tuner Band selection output
32 tuning Voltage (Vt) PWM output
33 Supply to periphery-3.3V)
2
34 I C-bus data line
2
35 I C-bus clock line
36
TV/AV (AV1) / AV2 mode Control Output.
37
TV/AV (AV1) / AV2 mode Control Output.
38 In STAND BY mode, high level (Power OFF).For Power ON this pin will
be reduced to low.
39
DESCRIPTION
18