DAEWOO ELECTRONICS DTQ-20J5FC, Service Manual

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3
IC DESCRIPTION
3) On Screen Displays function is interior designed.
4) Package.
: 42 PIN SDIP.
5) Tuner (Pre-scaler.) : I
2
C Bus.
/PLL IC
: TAU 6014-S(SIEMENS).
6) Remocon. : The IC of Transmission (MITSUBISHI M50560)
7) E
2
PROM. : 24C08(I
2
C Bus)
◊
Apply one byte Read/Write mode.
8) 6-Local Key. : A/D Input Control.(Power, Ch Up/Down, Vol Up/Down, Menu)
9) Option S/W : Port Input Option Check.
10) IF/V/C/D IC :LA76814(, The only NTSC), LA76810(, 3-system)
4. Function.
1) C. C. D. function.
- A section of C. C. D. operates FCC based specification.
2) C. C. D. controlled function.
- Closed Caption Mode. (Off<-->C1<-->C2<-->T1<-->T2<-->Off)
- CC On Mute.(Off <-->C1<-->C2<-->Off)
- Closed Caption is prior to CC On Mute.
3) Tuning Function.
- I
2
C Bus.
- PLL IC Interface.
- FS 181 Channel (AIR 2-69CH, CABLE 1-125CH)
- AFT Operation(Fine Tuning ) -2.5Fn+2.5MHz
- AIR/CABLE (STD, HRC, IRC ). Only Cable 5,6CH is that AFT range is cover over
broad-band. -2.3.5MHz.
.
- Memorize Channels.(If a channel is broadcasting, the channel is memorized.)
- Direct Tuning(09KEY)
- Channel Up/Down.(Memorized Channels) -> The Ch Up/Down buttons on the Remocon and on the front panel
are same function.
- Search Channel Up/Down.(If No-Memory or only 1CH is Memory)
- Channel Memory.(ADD/DELETE)
- Channel Review Function.
- Last Channel Memory Function.
4) OSD Function.
- In Line(Video) Mode, Things(Items) that is concerned with Air and Cable disappear in the Menu.
- Channel, AV display.
- Small & Graphic ICON Menu.
- Volume / Picture control --> I
2
C Bus Control
5) The Others Function.
- Video/Audio Mute Function.
- If a Channel is no signal, after 15 minutes is Auto-Power Off Function.