Cpu; Table 11-10: Status Outputs Check - Teledyne 300E Instruction Manual

TROUBLESHOOTING & REPAIR PROCEDURES
11.5.7.5. Control Inputs – Remote Zero, Span
The control input bits can be tested by the following procedure:
22. Connect a jumper from the +5 pin on the Status connector to the x5V on the
Control In connector.
23. Connect a second jumper from the '-' pin on the Status connector to the A pin
on the Control In connector. The instrument should switch from SAMPLE
mode to ZERO CAL R mode.
24. Connect a second jumper from the '-' pin on the Status connector to the B pin
on the Control In connector. The instrument should switch from SAMPLE
mode to SPAN CAL R mode.
In each case, the M300E should return to SAMPLE mode when the jumper is
removed.

11.5.8. CPU

There are two major types of failures associated with the CPU board: complete
failure and a failure associated with the Disk On Chip on the CPU board. If either of
these failures occur, contact the factory.
1. For complete failures, assuming that the power supplies are operating
properly and the wiring is intact, the CPU is bad if on powering the
instrument:
§
§
214

Table 11-10: Status Outputs Check

PIN
(left to right)
1
2
3
4
5
6
7
8
The vacuum fluorescent display shows a dash in the upper left hand
corner.
The CPU Status LED, DS5, is not flashing. (see Section 11.1.4.1.)
Model 300E Carbon Monoxide Analyzer
Status
SYSTEM OK
CONC VALID
HIGH RANGE
ZERO CAL
SPAN CAL
DIAG MODE
SPARE
SPARE
Instruction Manual
P/N 04288 Rev: A