Daewoo DTX-21G2, Service Manual, Page: 20 / 59

CP-520
V
Service Manual
19
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_HPR negative reference voltage SDAC (0 V)
122 VREF_HPR positive reference voltage SDAC (3.3 V)
123 VREF_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