Teledyne 3010PA - Split architecture percent oxygen analyzer - Manual (Page 52)

Part I: Control Unit Maintenance 5
Part I: 5-3
5.3 Major Internal Components
The major components in the Control Unit are shown in Figure 5-3.
Figure 5-3: Control Unit Major Internal Components
WARNING: HAZARDOUS VOLTAGES EXIST ON CERTAIN COM-
PONENTS INTERNALLY WHICH MAY PERSIST FOR
A TIME EVEN AFTER THE POWER IS TURNED OFF
AND DISCONNECTED.
The 3010PA Control Units contain the following major components:
• Power Supply
• Motherboard (with Microprocessor, RS-232 chip, and
Preamplifier PCB)
• Front Panel Display Board and Displays—
5 digit LED meter
2 line, 20 character, alphanumeric, VFD display
See the drawings in the Drawings section in back of this manual
for details.
The Front Panel Display Board is accessed by unlatching and swing-
ing open the front panel, as described earlier. Other electronic components
are accessed by removing four rear panel screws and sliding out the entire
chassis. See Figure 5-4, below.