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SERVICE DATA OF KEY ICs
Table 2 Functions and Service Data of TDA9373 (N201)'s Pins
Pin
Functions Description
No.
1
Port 1.3 or Counter/Timer 1 input
Port 1.6 or I
C-bus clock line
2
2
Port 1.7 or I
C-bus data line
2
3
4
Port 2.0 or Tuning PWM output
5
Port 3.0 or ADC0 input or PWM0 output
6
Port 3.1 or ADC1 input or PWM1 output
7
Port 3.2 or ADC2 input or PWM2 output
8
Port 3.3 or ADC3 input or PWM3 output
9
Digital ground for µ-Controller core and periphery
Port 0.5 (8 mA current sinking capability for direct drive
10
of LEDs)
Port 0.6 (8 mA current sinking capability for direct drive
11
of LEDs)
Analog ground of Teletext decoder and digital ground of
12
TV-processor
13
Internally connected
14
2nd supply voltage TV-processor (+8V)
15
Supply voltage of digital circuit of TV-processor
16
Phase-2 filter
17
Phase-1 filter
18
Ground 3 for TV-processor
19
Bandgap decoupling
Automatic Volume Levelling (90° versions) / E-W drive
20
output (110° versions) / Decoupling sound
demodulator (QSS version in AM/FM mode)
21
Vertical drive B output
22
Vertical drive A output
23
IF input 1
24
IF input 2
25
Reference current input
26
Vertical sawtooth capacitor
27
Tuner AGC output
28
Audio deemphasis or SIF input 1
29
decoupling sound demodulator or SIF input 2
SERVICE MANUAL
Reference
Voltage (V)
0.17
4.3~4.6
4.3~4.6
1.126
0.18
3.29
3.29
0.171
0
0.03
4.235
0
2.30
8.15
5
3.505
3.822
0
4
0.742
2.265
2.335
1.85
1.85
3.86
3.70
1.56
3.18
2.31
(Continued)
21
Digital Multimeter
Positive
Negative
Resistance
Resistance
(20KΩ)
(20KΩ)
∞
2.59
5.45
2.05
5.46
1.92
3.75
2.53
∞
2.59
1.68
1.66
1.68
1.66
7.74
2.42
0
3.46
2.19
6.67
2.19
0
4.61
2.84
1.54
1.48
4.45
2.22
4.82
2.79
5.02
2.83
0
3.47
2.55
4.63
2.69
5.06
2.71
5.06
2.71
4.35
2.86
4.35
2.86
4.83
2.87
4.51
2.78
3.52
2.66
4.37
2.86
4.37
2.86
0
0
0
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