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Installation
2–6
1780R-Series Service Manual
Table 2–3: Plug Jumpers for Waveform Board (Assembly A2)
(Schematic Diagrams 3 through 15)
Jumper
Number
Name Plug Position Purpose
J192
<9>
Remote Sync Polarity 1-2 {
2-3
Positive
Negative
J585
<10>
RGB YRGB 1-2
2-3 {
3-Step RGB Parade
4-Step YRGB Parade
J858
<9>
Sound-in-Syncs 1-2 {
2-3
Normal
Sound-in-Syncs
J694
<10>
NTSC PAL 1-2
2-3
NTSC (1780R)
PAL (1781R)
J865
<9>
Sync for Vector Clamps 1-2 {
2-3
Reference as source
Input Signal as source
J866 & J867
<9>
Sync for Waveform
Clamps
1-2 { & 1-2 {
2-3 & 2-3
Reference as source
Input Signal as source
J986
<15>
SCH Course Adjust Varies with the
circuits.
4-position jumper set up
during calibration
J1081
<14>
Frame Pulse Select 1-2 {
2-3
Internal
Ext. Video
J1085
(Active in NTSC only)
<14>
SCH Display Mode 1-2 {
2-3
Double
Single
J1103
<7>
Line Strobe 1-2
2-3 {
Line Select
Field 1 Pulse
J1483
<8>
Sound-in-Syncs 1-2 {
2-3
Normal
Sound-in-Syncs
{
Factory installed position.