Service manual

SERVICE MANUAL
IC DATA AND WAVEFORMS OF KEY POINTS
(continued)
7 Filter 1.79 7.9 6.29
8 1/2VCC comparison voltage bias 0
9 Video output 2.18 7.6 6.09
10 Second SIF signal output 2.03 7.7 6.17
11 Second SIF signal input 2.81 5.2 4.99
12 RFAGC output 0.04 6.1
13 AGC signal output 3.05 7.9 6.2
14
External connection for VCO
oscillating LC network
2.76 7 6
15
External connection for VCO
oscillating LC network
2.76 7 6
16 Ground 0 0.001 0.00
17 AGC filter 3.13 7.9 6.11
18 Supply voltage input terminal 8 2.1 2.7
19 SIF signal input 3.2 2.1 6.27
20 SIF signal input 3.2 7 6.27
Table 12 Functions and Service Data of TA1219AN (DS01)’s Pins
Digital Multimeter
Pin No. Function Description
Reference Voltage(V)
Positive Resistance
(20K
)
Negative Resistance
(20K )
1 Get Select 6.44 7.9 5.77
2 Get Select 3.03 7.9 5.73
3 Lin TV 5 7.5 5.89
4 RinTV 5 7.5 5.91
5 VinTV 5 7.5 5.89
6 LinTV1 5 7.6 5.89
7 RinTV1 5 7.7 5.89
8 VinTV1 5 7.5 5.89
9 LinS1 5 7.5 5.89
10 Y/VinS1 5 7.6 5.89
11 RinS1 5 7.6 5.88
12 CinS1 0.04 7.6 0.00
13 LinS2 5 7.6 5.87
14 Y/VinS2 5 7.6 5.87
15 RinS2 4.9 7.6 5.86
16 CinS2 0.04 7.6 5.64
17 I/O1 6.9 7.9 5.43
18 I/O2 0.04 7.9 5.44
19 GND 0.01 0.001 0.00
20 Scl 3.71 6.5 4.47
21 SDA 3.9 6.9 4.46
22 Sync out 0.2 7.9 5.45
23 Address 0.01 0.001 0.00
24 VinV2 5 7.65 5.81
(Continued)
32