Service manual

3-1
Contents
Theory
UCW (90385)
A typical 90385 system consists of these major components:
• 90385 monitor with integrated CRT display
• 90499 or 90491 module housing(s)
• DC power supply (one or more)
There may also be additional hardware devices present, such as a pointing device (mouse) and
keyboard.
Figure 3-1: Block diagram of a typical 90385 system
I/O and CPU
PCBAs
CRT
display
touchscreen
mouse
keyboard
module
module
DC power
90499
patient data
patient data
network
90385
supply
serial (PDL)
repeater (2)
1
2
SDLC
1
2
UCW (90385) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Ultraview 1700 (90387) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
CPU PCBA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
I/O PCBA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Interconnect PCBA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18