Table 1
Ground Resistance (R)
Step
Function
Working
Voltage
(V)
Positive
(
¦¸
)
Negative
(
¦¸
)
1
Tuning voltage control output
4.1
19.9K
19.9K
2
UHF channel selection control
0
3.7M
2.4M
3
VHF-H channel selection control
0
3.7M
2.4M
4
VHF-L channel selection control
5
3.7M
2.4M
5
B/G sound system selection control
0.3
3.7M
1.4M
6
D/K sound system selection control
5
3.7M
1.4M
7
I sound system selection control
5
3.7M
1.4M
8
M sound system selection control
4.1
3.6M
1.5M
9
Local control keyboard input
5
33K
26K
10
Local control keyboard input
5
33K
26K
11
Geomagnetic adjustment input, not
selected
0
3.8M
2.4M
12
PAL/NTSC system selection
5
3.8M
2.4M
13
Grounding
0
0
0
14
Neutral point
0
~
2.3M
15
Neutral point
0.9
~
2.3M
16
Myopia prevention PVD input, not
selected
5
9.9K
9.9K
17
Mute control output
0
33K
27K
18
Timer control output
0.2
30K
22.6K
19
Standby control output
0
30K
23K
20
Power signal output
4.9
5.6K
5.6K
21
Translucence background output,
not selected
0
33K
26.9K
22
Screen display B signal output
0
1.4M
2.4M
23
Screen display G signal output
0
1.5M
2.5M
24
Screen display R signal output
0
1.5M
2.5M
25
Blanking signal output
0
3.7M
2.5M
26
Line return pulse signal input,
character horizontal locating
4.5
33K
27K
27
Field return pulse signal input,
character vertical locating
5.1
34K
27K
28
Character oscillation
2.2
3.4M
2.3M
29
Character oscillation
2.3
3.4M
2.3M
30
Grounding
0
0
0
31
7.3MHz crystal oscillation
connection, master clock oscillation
2
3.7M
2.5M
32
7.3MHz crystal oscillation
connection, master clock oscillation
2
3.7M
2.5M
14