Teledyne 7320 - NDIR analyzer - Manual (Page 76)

5 Maintenance Model 7320
5-4
Teledyne Analytical Instruments
> 0 Amplifier failure high offset (number is a code
that pinpoint which gains are at fault).
Detector
0 OK
1 Failed (open filament, short to ground, no
power.)
2 Unbalance (deterioration of filaments, blocked
tube)
5.5 Major Internal Components
All internal components are accessed by unbolting and pulling open the
rack assembly, removing the front cover, as described earlier.
The 7320 contains the following major internal components:
• Customer Interface PCB (Power Supply on bottom surface)
• Preamp PCB (Contains Microprocessor)
• Front Panel PCB (Contains 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.