27
N201 TB1238AN
Reference Voltage(V)
Reference Resistance(K
Ω
)
Pin Function
Without
signal
With signal
Forward(
Ω
) Backward(
Ω
)
1 Unweighted
5.0
5.0
800
2000
2 Audio signal output
3.5
3.5
750
2000
3 PIF circuit power supply
9.0
9.0
460
600
4 AFT output and auto-adjusting
2.1
2.1
750
600
5 PIF circuit grounding
0
0
0
0
6 IF signal input pin
2.0
2.0
680
2000
7 IF signal input pin
2.0
2.0
680
2000
8 RF AGC output
6.6
4.0
680
2000
9 IF AGC filtering
5.2
4.1
760
2000
10 Color demodulation APC filtering
2.4 2.4 750
3000
11 4.43MHz crystal oscillator
3.5
3.5
820
3000
12 Y/C circuit grounding
0
0
0
0
13 Analog RGB and AKB mode
alternating
0 0 720
650
14 Analog R signal input
2.7
2.7
800
3000
15 Analog G signal input
2.7
2.7
800
3000
16 Analog B signal input
2.7
2.7
800
3000
17 RGB(image and message
circuit) power supply
9.0 9.0 450
600
18 R signal output
3.0
3.0
760
1500
19 G signal output
3.0
3.0
760
1500
20 B signal output
3.0
3.0
720
1400
21 ABCL control pin
5.6
5.6
820
2000
22 Field sawtooth wave forming
4.1
4.1
750
2000
23 Field feedback signal
5.0
5.0
820
2000
24 Field driving signal output
0.9
0.9
720
900
25 Field
AGC
1.8
1.8
800
2000
26 Bus clock signal
5.0
5.0
720
15000
27 Bus data signal
5.0
5.0
720
15000
28 Deflection circuit power supply
9.0
9.0
450
600
29 PAL/NTSC identification signal
output
SECAM identification signal input
1.5 1.5 800
2000
30 Line feedback pulse input
0.6
0.6
780
2000
31 Composite synchronizing pulse
signal output
4.5 4.5 780
2000
32 Line driving signal
2.7
2.7
640
680
33 Deflection circuit grounding pin
0 0
0
0
34 Sandcastle pulse input
1.5
1.5
820
2000
35 Video switching signal output
3.1
3.1
750
1200
36 Digital circuit power supply
5.0
5.0
470
800
37 SECAM B-Y signal input
2.4
2.4
800
2000
38 SECAM R-Y signal input
2.4
2.4
800
2000
39 Y signal input
3.1
3.1
800
3600
Circuit Explanation
