![background image](http://html.mh-extra.com/html/haier/21f99/21f99_service-manual_137988020.webp)
Reference Voltage(V)
Reference Resistance
Pin Function
Without
With
Forward(
Ω
) Backward(
Ω
)
signal
signal
23 Green primary color
character output
0 0 620 2200
24
Blue primary color
character output
0 0 620 2200
25
Character
blanking
0 0 620 2200
26 Line
flyback
4.0
4.0
680
10000
27 Field
flyback
4.8
4.8
680
10000
28 Character
oscillating
5.0
5.0
600
10000
29 Character
oscillating
5.0
5.0
0
10000
30 Grounding
0
0
0
0
31 CPU
clock
2.1
2.1
700
10000
32 CPU
clock
2.1
2.1
700
10000
33 CPU
reset
5.0
5.0
650
40000
34 Vacant
pin
5.0
5.0
700
10000
35
Infrared receiving input
5.0
5.0
700
10000
36 Line synchronizing signal
input
4.7 4.7 700 10000
37
Clock bus control
2.9
2.9
700
10000
38
Data bus control
3.2
3.2
700
10000
39 Vacant
pin
0
0
700
10000
40 Vacant
pin
4.6
4.6
700
10000
41 Vacant
pin
0
0
700
10000
42 Power
supply
5.0
5.0
420
2700
N101 LA7910
Reference
Voltage(V)
Reference Resistance
Pin Function
Without signal
Forward(K
Ω
) Backward(K
Ω
)
1 Output
(BU)
1.7
120
7.2
2 Output
(BH)
12.6
17.5
7.5
3 Control
input
4.8
6.5
8.5
4 Control
input
0
6.5
9.0
5 Grounding
terminal
0
0
0
6
Power input terminal 1
14.0
6.0
50
7 Output
(BL)
0
1.5
1.5
8 Vacant
pin
0
8.5
9
Power input terminal 2
12
0.5
0.5
Summary of Contents for 21F99
Page 29: ......
Page 44: ......
Page 45: ...Sincere Forever Haier Group Tel 86 532 8938356 Web side http www haier com ...