Service manual

SERVICE MANUAL
IC DATA AND WAVEFORMS OF KEY POINTS
(continued)
18 I2S-DA-IN2 NC 0.07 7.3 5.31
19 NC 0
20 RESETQ 4.76 7 5.24
21 DACA-R NC 0.8 3.5 3.54
22 DACA-L NC 0.08 3.5 3.52
23 VREF-I 0.01 0.001 0.00
24 DACM-R 0.17 3.5 3.52
25 DACM-L 0.08 3.5 3.54
26 DACM-SVB NC 0.18 3.6 3.6
27 SC2-OUT-R NC 3.82 7.1 5.92
28 SC2-OUT-L NC 3.82 7.1 5.91
29 CREF 1 0.01 0.001 0.00
30 SC1-OVT-R 3.82 7.1 5.91
31 SC1-OUT-L 3.82 7.1 5.92
32 SAPL-A 7.19 7.1 6.04
33 AHVSUP 8 1.3 4.59
34 CAPL-M 7.2 7.1 6.04
35 AHVSS 7.2 7.1 0.00
36 ABNDC 0.01 0.001 6.02
37 SC3-ZN-L NC 3.74 7.1 6.1
38 SC3-IN-R NC 3.77 7.1 6.1
39 SC2-IN-L NC 3.77 7.1 6.1
40 SC2-IN-R NC 3.77 7.1 6.1
41 SC1-IN-L 3.77 7.1 6.1
42 SC1-IN-R 3.77 7.1 6.1
43 VREFTOP 2.6 1.6 1.63
44 WONO-IN NC 3.78 7 6.1
45 AVSS 0.01 0.001 0.00
46 AVSVP 4.9 0.7 4.53
47 ANA-IN1+ 1.53 7.3 5.27
48 ANA-IN1- 1.53 7.3 5.26
49 ANA-IN2+ 0.09 7.3 5.27
50 TESTEN 0.01 0.001 0.00
51 XTAL-2N 2.35 6.8 5.27
52 XTAL-OUT 2.36 6.8 5.3
Table 11 Functions and Service Data of TDA9808T (NQ102)’s Pins
Digital Multimeter
Pin No. Function Description
Reference Voltage(V)
Positive Resistance
(20K
)
Negative Resistance
(20K )
1 PIF signal input 1 3.23 7.2 6.03
2 PIF signal input 2 3.23 7.2 5.99
3 RFAGC start-control level adjust 0.99 6.7 5.85
4 PLL APC filter 2.53 7.9 6.3
5 Audio AGC filter 3.29 7.8 6.17
6 Audio output (NTSC 4.5MHz) 2.34 7.2 5.86
(Continued)
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