Service manual

DV-L70U
9-19. IC1801 IR3Y29BM
Pin No. Terminal name Operation function
1 TRAP It is a trap connection terminal. Output impedance is 1kΩ.
2 CONTRAST Adjustment can be done the signal contrast from the video input (Y/C input).
3 VIDEO IN It is the input terminal of the composite video signal (in the case of the Y/C input, Y signal).
4 IDENT FILTER It is a filter connection terminal for ident detection.
5 C IN It is the input terminal of the chroma signal at the time of the y/c input.
It comes to deal with composite video input when this terminal is articulated in GND again.
6 COLOR It is a color adjustment terminal.
7 BURST OUT A burst cleaning coil is articulated at the time of the PAL preference.
8 KILLER FILTER It is the connection terminal of the filter for killer detection.
9 R-Y It is the input terminal of the color difference demodulation circuit.
10 B-Y
11 ACC FILTER It is the connection terminal of the filter for the ACC detection.
12 CHROMA OUT A collar is adjusted, and it is the output terminal of the chroma signal which went ahead of the burst.
13 TINT It is a terminal for the hue adjustment.
The transfer switch of NTSC/PAL is included, and it comes to deal with PAL by articulating it in GND.
14 VCO IN It is the input terminal of VCO.
15 APC FILTER It is the connection terminal of the filter for the APC detection.
16 VCO OUT It is the output terminal of VCO.
17,18 GND1,2 GND1, GND2 aren't articulated inside the integrated circuit.
Give me these terminals as the surely same electric potential.
20 R DC DET It is the smoothing capacitor connection terminal of the feedback circuit for the RGB output DC level
22 G DC DET control.
25 B DC DET Employ the condenser which leakage is rare in for the high impedance.
19 R OUT It is the output terminal of the RGB primary colors signal.
21 G OUT
24 B OUT
23 Vcc2 It is a power source connection terminal for the RGB Hara output.
26 GAMMA 2
Adjustment can be done the point of the gamma 2.
This terminal is preset inside.
28 RGB AMPLITUDE Adjustment can be done between black-black of the RGB output signal the swing and the dynamic range.
ADJUST This terminal is preset inside.
27 GAMMA 0 Adjustment can be done the point of the gamma 0.
This terminal is preset inside.
29 BRIGHT A gamma compensation curve and the adjustment of the swing of common output can be done.
30 SUB BRIGHT B It interlocks with the gamma compensation curve, and R and the slight adjustment of bright of B can be done.
31 SUB BRIGHT R This terminal is preset inside.
32 COMMON FRP It is the input terminal of the timing pulse for level switching of the COMMON output.
33 FRP It is the input terminal of the timing pulse for the RGB output inversion.
It is inverted with L, and it becomes non-inverting with H.
34 SYNC IN It is the input terminal of low active horizontal synchronizing.
A flip-flop is inverted at the time of PAL at the start of this synchronizing signal.
35 SYNC OUT High active, and the composite synchronizing signal isolated in the synchronous separation circuit is
outputted.
An output form is open collector.
36 SYNC SEP It is a synchronous separation circuit input terminal.
37 COMMON The adjustment of the COMMON signal amplitude can be done.
AMPLITUDE
This terminal is preset inside.
ADJUST
38 COMMON OUT It is the output terminal of the COMMON signal.
39 SW It is a SW signal input terminal whether to display either RGB input or video input.
'H' Or, it is open, and video input (Y/C input) is chosen in the RGB input, 'L'.
40 B IN It is the input terminal of the RGB signal.
41 G IN Input a signal by the capacitive coupling.
42 R IN
43 Vcc It is a power source connection terminal.
44 F ADJ The characteristics of the built-in filter can do adjustment by the value of the backlash articulated in this
terminal.18kΩ is recommended with both NTSC and PAL.
Give me articulated backlash as the resistance value tolerance ± 2%, temperature characteristic
±200ppm/°C.
45 CLAMP It is the connection terminal of the capacity for the pedestal clamp of the luminance signal.
Employ the condenser which leakage is rare in for the high impedance.
46 AGC FILTER It is the connection terminal of the filter for the automatic gain control detection of the luminance signal.
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