![background image](http://html.mh-extra.com/html/xoceco/let3250/let3250_service-manual_888213013.webp)
11
Function introduction to pin
pin function
Reference
voltage
(V)
pin function
Reference
voltage
(V)
1
SIF output
2.28
64
PIF input1
2.86
2
PIF AGC
2.61
63
PIF input 2
2.86
3
SIF input
3.11
62
IF GND
0
4
FM filter
2.64
61
RF AGC output
4.55
5
FM filter/sound output
2.25
60
Video output
2.30
6
Sound output
2.24
59
AFT filter
2.50
7
SIF APC filter
2.24
58
APC filter
2.60
8
IF
VCC(5V)
4.92
57
Black level detection
filter
2.50
9
Expanded sound input
2.25
56
Internal video input and
S-C input
2.70
10
ABL
3.21
55
Video, colour and
deflexion power VCC
4.90
11
RGB
VCC(8V/18Ma)
8.00
54
Expanded video input
and Y input
2.50
12
R ouput
2.65
53
Colour APC filter
3.40
13 G
ouput
2.65 52 Selection
video
output
and FSC output
2.40
14
B ouput
2.67
51
Cr input
2.50
15
AKB (undo)
2.31
50
4.43 MHZ crystal
2.73
16
Field sawtooth filter to
capacitance
2.16 49
Cb
input
2.50
17
Field output
2.34
48
Fast blank-out input
0
18
VCO Reference voltage 1.65
47
R input
1.89
19
H/BUS VCC(5V/27mA)
6.81
46
G input
1.90
20
H/APC filter
2.54
45
B input
1.90
21
H-output
0.28
44
Retrace impulse input
1.20
22 Video,colour and
deflexion ground
0 43
CCD
VCC
4.50
23
x -ray protection, low
level availability
5.00 42 CPU
GND
0
24
S input detection, high
Level availability
3.50 41 PLL
3.50
25
DVD detection, high
Level availability
6.50 40 reset
4.00
26
IR control input
4.90
39
Button input
0.32
27
AV1/AV2 H=AV1
L=AV2
0
38
TV/AV H=TV L=AV
0
Summary of Contents for LET3250
Page 1: ...COLOR TELEVISION LET3250 TS3250 ...
Page 12: ...10 MAIN IC LA76930 BLOCK DIAGRAM ...
Page 15: ...13 FSCQ1265RT ...
Page 16: ...14 WIRING DIAGRAM ...
Page 17: ...EXPLODED VIEW ...