Changhong Electric PF2939, Service Manual, Page: 25 / 47

SERVICE MANUAL
Table 3 Functions and Service Data of AT24C16 (N202)’s Pins
Digital Multimeter
Pin
No.
Functions Description
Reference Voltage
(V)
Positive Resistance
(20K
Ω
)
Negative Resistance
(20K
Ω
)
1 Address input 0 0 0
2 Address input 0 0 0
3 Address input 0 0 0
4 Common ground 0 0 0
5 Serial data
4.3~4.6
5.75 1.91
6 Serial clock input
4.3~4.6
5.75 2.23
7 Write protect 0 0 0
8 Supply voltage 5 3.03 1.92
Table 4 Functions and Service Data of TA1343N (N301)’s Pins
Digital Multimeter
Pin No. Name
Reference
Voltage (V)
Positive Resistance
(20K
Ω
)
Negative Resistance
(20K
Ω
)
1 Offset canceling filter 4.6 7.26 2.757
2
φ
4 4.6 7.31 2.769
3
φ
3 4.6 7.26 2.774
4
φ
2
4.6 7.25 2.771
5
φ
1 4.6 7.16 2.763
6 Lch input 4.5 7.08 2.764
7 GND 0 0 0
8 Rch input 4.5 7.12 2.764
9 Bias filter 5.9 7.31 2.754
10 Bass LPF (R) 4.6 6.85 2.756
11 Treble HPF (R) 4.6 7.10 2.762
12 Wch output 4.5 7.09 2.739
13 Rch output 4.4 6.77 2.731
14 Treble HPF (L) 4.6 7.09 2.759
15 Bass LPF (L) 4.5 6.87 2.754
16 Lch output 4.4 6.76 2.727
17 Woofer LPF 1 5.3 6 2.759
18 Woofer LPF 2 5.2 7.33 2.757
19 Woofer LPF 3 5.3 6.18 2.765
20 Vcc 8.9 3.06 1.834
21 Volume filter 3.2 7.37 2.762
22 Woofer filter 4.5 7.37 2.739
23 SCL
4
.3~
4
.6 5.75 2.247
24 SDA
4.3~4.6
5.75 2.049
23