Installation1780R-Series Service Manual 2–7Table 2–4: Plug Jumpers and DIP Switch on the Microprocessor Board (Assembly A5) (Schematic Diagrams 16 through 19)
Jumper
Number Name Plug Position Purpose
J342
<16> mProcessor Restart
Maintenance }
Removed {
Installed
Normal operation
Non-maskable interrupt to
processor
J344
<16> mProcessor Reset
Maintenance }
Removed {
Momentary Closure
Normal operation
Resets processor (Used
with a factory startup
DEBUG program)
J453
<17> RAM Part Selection Removed {
Installed
128 K RAM installed
512 K RAM installed
S385
<19> Special purpose
4-position DIP switch 1
2
3
4
Open = NTSC
Closed = PAL
Open = Password
Closed = No password
} Open = Norm. Oper.
Closed = DEBUG
Not used.
{Factory installed position.
}Special maintenance use only.
Table 2–5: Plug Jumpers for Vectorscope Board (Assembly A6) and Oscillator Board (Assembly A7)
Jumper
Number Name Plug Position Purpose
J108 (A6)
<29> X Input Gain Removed {
Installed
X gain is normal
X gain is in High Gain position
J205 (A6)
<29> Y Input Gain Removed {
Installed
Y gain is normal
Y gain is in High Gain position
J321 (A6)
<27> Center Dot Blanking 1-2
2-3_ {
Center dot unblanked
Center dot blanked