Daewoo DTC-21Y1/21Y2 User Manual
Page 21
CP-520/520A/520F Service Manual
DTV R&D Europe
20
87
SIFAGC/DVBAGC (2)
AGC sound IF / internal-external AGC for DVB
applications
88
PLLIF
IF-PLL loop filter
89
GND2
ground 2 for TV processor
90
QSSO/AMOUT/AUDEE
M (2)
QSS intercarrier output / AM output / deemphasis
(front-end audio
out)
91
DECSDEM
decoupling sound demodulator
92
AUDOUTSR
audio output for SCART/CINCH (right signal)
93
AUDOUTSL
audio output for SCART/CINCH (left signal)
94
AUDIOIN5R
audio-5 input (right signal)
95
AUDIOIN5L
audio-5 input (left signal)
96
AVL/SWO/SSIF/
REFO/REFIN (2)
Automatic Volume Levelling / switch output / sound IF
input /
subcarrier reference output / external reference signal
input for I
signal mixer for DVB operation
97
EHTO
EHT/overvoltage protection input
98
AGCOUT
tuner AGC output
99
SIFIN2/DVBIN2 (2)
SIF input 2 / DVB input 2
100
SIFIN1/DVBIN1 (2)
SIF input 1 / DVB input 1
101
GNDIF
ground connection for IF amplifier
102
IREF
reference current input
103
VSC
vertical sawtooth capacitor
104
VIFIN2
IF input 2
105
VIFIN1
IF input 1
106
VDRA
vertical drive A output
107
VDRB
vertical drive B output
108
EWD/AVL (1)
East-West drive output or AVL capacitor
109
DECBG
bandgap decoupling
110
SECPLL
SECAM PLL decoupling
111
GND1
ground 1 for TV-processor
112
PH1LF
phase-1 filter
113
PH2LF
phase-2 filter
114
VP1
1st supply voltage TV-processor (+5 V)
115
DECDIG
decoupling digital supply
116
VGUARD/SWIO
V-guard input / I/O switch (e.g. 4 mA current sinking
capability for
direct drive of LEDs)
117
VSSA1
Ground
118
XTALOUT
crystal oscillator output
119
XTALIN
crystal oscillator input
120
VREF_POS_HPR
positive reference voltage SDAC (3.3 V)
121
VREF_NEG_HPL+HPR negative reference voltage SDAC (0 V)
122
VREF_POS_LSR+HPR positive reference voltage SDAC (3.3 V)
123
VREF_NEG_LSL+HPL negative reference voltage SDAC (0 V)
124
VREF_POS_LSL
positive reference voltage SDAC (3.3 V)
125
VDDA3(3.3V)
supply (3.3 V)
126
VDDC4
digital supply to SDACs (1.8V)
127
VSSC4
Ground
128
VSSP2
Ground