Error Examination And Regulation Circuit Schematics; 4.7.1 General Errors - Thermo Scientific BB 150 User Manual

4.7 ERROR EXAMINATION AND REGULATING CIRCUIT SCHEMATICS

4.7.1 GENERAL ERRORS:

General errors are those that cannot be assigned to a specific regulating circuit.
Error Test
code equipment /
Test at the unit
≡≡≡
Bus cable and
display PCB
both in working
order.
44
42
43
54
Name
Prepared
Index Name
50078923_04_CN
File
Inspections and tests
Switch the unit off.
Disconnect the bus
cable to the display PCB
at the main board.
Attach the test set
(cable/display PCB).
Switch the unit on.
Perform the functional
test.
Switch unit off then on.
Check if error reoccurs.
Switch the unit off, then
on. Check if the error
reoccurs.
Check the error list.
Date
JF 05.07.13
Date
Possible corrective actions
•
Test set operational:
• Repeat the functional test of
the individual installed
components. Replace the
cable or display PCB.
Test set not operational:
• Replace the main board.
Replace the measuring cell.
Replace the main board.
Replace the main board.
If the error reoccurs, inform
the factory (Q)
Designation
Service Manual BB 150
Document No.
50 079 823
Page
21/ 21