Changhong Electric 34T18, Руководство по обслуживанию, Страница: 53 / 61

SERVICE MANUAL
51
Table 13 Functions and Service Data of AT24C16 (N102)’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 6.37 6.4
6 Serial clock input 4.2 6.37 6.44
7 Write protect 0 0 0
8 Supply voltage 4.9 3.03 3.02
Table 14 Functions and Service Data of TDA8944J (N603)’s Pins
Digital Multimeter
Pin
No.
Functions Description Reference Voltage
(V)
Positive Resistance
(20K
Ω
)
Negative Resistance
(20K
Ω
)
1 Negative loudspeaker terminal 1 7.98 ∞ ∞
2 Ground channel 1 0 0 0
3 Supply voltage channel 1 14.9 5.8 7.7
4 Positive loudspeaker terminal 1 7.3
∞ ∞
5 Not connected 0
∞ ∞
6 Positive input 1 7.3
∞ ∞
7 Not connected 0
∞ ∞
8 Negative input 1 7.4
∞ ∞
9 Negative input 2 7.3
∞ ∞
10
Mode selection input (standby,
mute, operating)
0 7.8 8.9
11
Half supply voltage decoupling
(ripple rejection)
7.6 ∞ ∞
12 Positive input 2 7.3
∞ ∞
(Continued)