Haier HLTDC19 Service Manual

Also see for HLTDC19 - 19" LCD TV: User manual User manual

Contents

Haier HLTDC19 Service Manual Manual pdf 12 page image

ICs Function Description1.UOC3Function：TV signal processor with Teletext and NicamPIN SYMBOL DESCRIPTION1 VSSP2 ground2 VSSC4 ground3 VDDC4 Digital supply to SDACs(1.8V)4 VDDA3(3.3V) Supply(3.3V)5 VREF_POS_LSL Positive reference voltage SDAC(3.3V)6 VREF_NEG_LSL+HPL Negative reference voltage SDAC(0V)7 VREF_POS_LSR+HPR Positive reference voltage SDAC(3.3V)8 VREF_NEG_HPL+HRP Negative reference voltage SDAC(0V)9 VREF_POS_HPR Positive reference voltage SDAC(3.3V)10 XTALIN Crystal oscillator input11 XTALOUT Crystal oscillator output12 VSSA1 ground13 VGUARD/SWIO V-guard input/I/O switch (e.g.4mA current sinkingcapability for direct drive of LEDs)14 DECDIG Decoupling digital supply15 VP1 1st supply voltage TV-processor(+5V)16 PH2LF Phase-2 filter17 PH1LF Phase-1 filter18 GND1 Ground 1 for TV-processor19 SECPLL SECAM OLL decoupling20 DECBG Bandgap decoupling21 EWD/AVL East-West drive output or AVL capacitor22 VDRB Vertical drive B output23 VDRA Vertical drive A output24 VIFIN1 IF input 125 VIFIN2 IF input 226 VSC Vertical sawtooth capacitor27 IREF Reference current input28 GNDIF Ground connection for IF amplifier29 SIFN1/DVBIN1 SIF input 1/ DVB input 130 SIFN2/DVBIN2 SIF input 2/ DVB input231 AGCOUT Tuner AGC output32 EHTO EHT/over voltage protection input33 AVL/SWO/SSIF/REFO/REFINAutomatic volume leveling/switch output/sound IFinput sub-carrier reference output/external referencesignal mixer for DVB operation