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Daewoo DTC-21Y1/21Y2 User Manual

Page 21

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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