Aiwa Comprehensive Guide to CRT TV Functionality and Features

Pin No.	Pin Name	I/O		Description
43	SYNC IN	I	Input of the synchronous separation circuit.
44	BLK DET	–	The terminal to be connected with an Black Det filter.
45	C IN	I	Input of chroma signals.
46	Y/C VCC	–	VCC of Y/C circuit.
47	IFDET OUT	O	Composite video signal and SIF signal detected in IF circuit.
48	LOOP FLTR	–	Loop filter for IF PLL.
49	VCO GND	–	GND of VCO and SIF circuit.
50	VCO	–	The terminal connected with a tank coil for IF VCO.
51	VCO	–	The terminal connected with a tank coil for IF VCO.
52	VCO VCC	–	VCC of IF VCO and SIF.
53	HCOR/SIF IN	I	H.curve correction and SIF input.
54	RIP FLTR	–	Connected with cap to stabilize the performance of SIF injection-lock circuit.
55	SIF OUT	O	Output of 2nd SIF signal. (Not used)
56	FM DC NF	I	The terminal for FM DC negative feedback and AGC filter for L-SECAM.
IC, TA1275AZ
Pin No.	Pin Name		I/O	Description
1	Y OUT		O	The output pin for Y signal.
				The pin for controlling the Y processing mode:
2	DL-MODE		O	to VCC: 5.5MHz trap ; open: 5.5MHz trap + D.L ; to GND: DL. (Not used)
3	R-Y OUT		O	The output pin for demodulated R-Y signal.
4	R-Y CONT		I	The pin for controlling the black offset level. (Not used)
5	B-Y OUT		O	The output pin for demodulated B-Y signal.
6	B-Y CONT		I	The pin for controlling the black offset level. (Not used)
7	S-ID FILTER		I	The pin for connecting the SECAM ident filter capacitor.
8	R-Y IN		I	The input pin for external R-Y signal. (Not used)
9	VCC		–	The VCC pin for Y/C processing block.
10	B-Y IN		I	The input pin for external B-Y signal. (Not used)
11	GND		–	The GND pin.
12	F0-FIL		I	The pin for connecting a capacitor for automatic adjusting circuit.
13	C IN		I	The chroma signal input pin.
14	BELL-FIL		I	The pin for connecting a capacitor for the bell filter fo, 4.286MHz.
15	Y IN		I	The Y signal input pin.
16	BELLCONT		I	The pin for selecting the bell filter fo. fo + 70KHz: open ;
				fo + 35KHz:20k to GND ; fo: to GND. (Connected to GND).
17	SCP-IN		I	The pin to input the sand castle pulse, SCP.
18	VCC		–	VCC pin for logic block.
19	4.43 CW		I	The pin for input 4.43MHz of carrier wave for self adjustment circuit.
20	ID SW		I	The switch pin for selecting the ID detection mode. H + V: connected to VCC ;
				Auto search: opened ; H: connected to GND. (Not used.)
21	SYSTEM		I/O	The interface pin to the main processor.

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