Top View - NEC MultiSync FE700 Serviceanleitung

Test Circuits
J1
RED OSD INPUT
GREEN OSD INPUT
BLUE OSD INPUT
OSD INPUT SELECT
RED VIDEO IN
GREEN VIDEO IN
BLUE VIDEO IN
V
CC
R11
100k
POT5
VIDEO CONTRAST
100K
C12
0.1µF
POT6
OSD CONTRAST
100K
FIGURE 2 LM1281 OSD Video Preamp Demonstration Board Schematic
C2
0.1µF
R1
1
33
R2
2
33
R3
3
33
R4
4
33
R6
C3
5
33
R5
10µF
50/75
6
C5
0.1µF
7
R7
C4
8
33
R8
10µF
50/75
9
C6 C7
100µF 0.1µF
10
R9 C9
11
R10
33
10µF
50/75
C8 12
0.1µF
13
C10
0.1µF
14
C11
0.1µF
V = + 12V
CC
C1
100µF
28
C21
0.1µF
27
C20
0.1µF
26
C19
0.1µF
25
C18
0.1µF
24
C17
0.1µF
23
LM1281

TOP VIEW

22
C15
0.1µF
21
20
19
C14
0.1µF
18
17
C13
0.1µF
16
R17
15
100
*L1 is a Ferrite Bead
8 - 28
R21 47k
POT3
RED DRIVE ADJ.
100K
POT1 GREEN DRIVE ADJ.
100K
POT2 BLUE DRIVE ADJ.
100K
POT4
RGB CUTOFF ADJ.
100K
L1
R19
RED VIDEO OUT**
R20
430
2.4k
C16
100µF
R18
GREEN VIDEO OUT**
R17
430
2.4k
R15
BLUE VIDEO OUT**
R16
430
2.4k
R17
BLANK GATE
100
CLAMP GATE
**50Ω Termination to
be Used at Outputs
TL/H/12355-12