Sony DPA-300 Service Manual page 66

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• IC401 DIGITAL COMB FILTER (CXD2023Q) / VIDEO-IN BOARD
Pin No. Pin Name I/O
1 VI8 I
2 ~ 7 VI7 ~ VI2 I
8 VI1 I
9 ADCO I
10 INSL I
11 OCLK I
12 DVSS —
13 DVDD —
14 CLKO O
15 MCK I
16 ADCK I
17 CLPI I
18 XCPON I
19 ADVS —
20 ICP I
21 CRV I
22 RB O
23 GR —
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L 13942296513
24 AAVS —
25 ADIN I
26 AAVD —
27 RT O
28 ADVD —
29 YVDD —
30 XAYO O
31 AYO O
32 YVG O
33 YVRF I
34 YIRF O
35 YVSS —
36 VB O
37 CVDD —
38 XACO I
39 ACO O
40 CVG O
41 CVRF I
42 CIRF O
43 CVSS —
44 YA O
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Digital input (MSB) (Not used)
Digital input (Not used)
Digital input (LSB) (Not used)
When this pin is "H", the video signal input coming from the A/D converter (input pin A/DIN) is output to the Y
output terminal (YA to Y3) in the form of 8-bit digital data with delay of 3.5 clocks.
When this pin is "L", this is normal mode. (Fixed to "L".)
Input selection of comb filter. "H": Digital input. "L": Analog input (Fixed to "L".)
Clock amplifier input (14.3 MHz)
Digital Ground
Digital power supply (+5 V)
Clock amplifier output (14.3 MHz)
Clock input (Connected pin-14)
Clock input to A/D converter (Connected pin-14)
A/D converter clamp pulse input. The signal voltage when the clamp pulse is Low, is clamped.
When this pin is "H", the clamp function is turned "OFF" so that the normal A/D converter function
only works. When this pin is "L", the clamp function is turned "ON". (Fixed to "L".)
Digital Ground for A/D converter
Voltage integrator terminal for clamp control
Clamp reference voltage input
Reference voltage (Bottom) standard value (+0.5 V)
Guard ring (Connected to Ground)
Analog Ground for A/D converter
Comb filter analog input (A/D converter input)
Analog power supply for A/D converter (+5 V)
Reference voltage (Top) standard value (+2.6 V)
Digital power supply for A/D converter (+5 V)
Power supply for Y-A/D converter (+5 V)
AYO inverted current output terminal (Connected to Ground)
Analog luminance signal output
Connected to capacitor
Full scale value setting terminal for analog luminance signal
An external resistor having "16R" that is 16 times with respect to the output resistance "R" of the AYO
terminal, is connected to this pin
Ground for Y-D/A converter
Connected to capacitor
Analog power supply for C-D/A converter (+5 V)
ACO inverted current output terminal (Connected to Ground)
Analog chroma signal output
Connected to capacitor
Full scale value setting terminal for analog chroma signal
An external resistor having "16R" that is 16 times with respect to the output resistance "R" of the ACO
terminal, is connected to this pin
Ground for C-D/A converter
Digital luminance signal output (MSB)
Digital luminance signal output (Not used)
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