Teac CTM6845, Руководство по обслуживанию

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10
5. ICs functional description
UOC TDA93XX
SYMBOL PIN DESCRIPTION
STAND BY output. 1 In STAND BY mode, high level (Power OFF).
For Power ON this pin will be reduced to low.
SCL 2 I
2
C-bus clock line
SDA 3 I
2
C-bus data line
TUNING 4 tuning Voltage (Vt) PWM output
P3.0/NTSC SW 5 Port 3.0 or NTSC output/SCART SW input, Forced NTSC selection,
Low-level output, otherwise High output.
KEY 6 Control keys input *3
VOL 7 Sound Volume control PWM output
MUTE 8 Sound mute output
VSSC/P 9 Digit ground for µ-controller core and periphery
BAND1 10 Tuner Band selection output
BAND2 11 Tuner Band selection output
VSSA 12 Analog ground of teletext decoder and digital ground of TV-processor
SECPLL 13 SECAM PLL decoupling
VP2 14 2
nd
supply voltage TV-pro8V)
DECDIG 15 decoupling digital supply of TV-processor
PH2LF 16 Phase-2 filter
PH1LF 17 Phase-1 filter
GND3 18 Ground 3 for TV-processor
DECBG 19 Band gap decoupling
AVL/EWD 20 Automatic volume leveling /EAST-WEST drive output
VDRB 21 Vertical drive B output
VDRA 22 Vertical drive A output
IFIN1 23 IF input 1
IFIN2 24 IF input 2
IREF 25 Reference current input
VSC 26 Vertical sawtooth capacitor
TUNER AGC 27 Tuner AGC output
AUDEEM/SIFIN1 *1 28 Audio deemphasis or SIF input
DECSDEM/SIFIN2 29 decoupling sound demodulator or SIF input 2
GND2 30 ground 2 for TV processor
SNDPLL/SIFAGC *1 31 narrow band PLL filter or AGC sound IF
AVL/SNDIF/REF0/
AMOUT *1 32 Automatic Volume Levelling / sound IF input / subcarrier reference output / audio
deemphasis
HOUT 33 horizontal output
FBISO 34 flyback input/sandcastle output
AUDEXT/QSSO/
AMOUT *1 35 external audio output / QSS intercarrier out
EHTO 36 EHT/overvoltage protection input
PLL IF 37
IF-PLL loop filter
IFVO/SVO 38
IF video output / selected CVBS output
VP1 39 supply voltage TV processor
CVBS INT 40 internal CVBS input
GND1 41 ground for TV processor
CVBS/Y 42 CVBS/Y input
CHROMA 43
C input
AUDOUT/AMOUT *1 44 audio output /AM audio output (volume controlled)