Sorvall TC6, Service Manual

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Troubleshooting SORVALL

Centrifuges
6-2
Table 6-1. TC6
®
Troubleshooting Chart (continued)
Problem Probable Cause Solution
9. 5 Vdc on display is greater
than 8 Vdc.
10. Loss of 5 Vdc supply.
11. Electrostatic discharge.
1. Loss of 30 Vac supply.
2. Shorted 30 Vac to dc regula-
tor.
3. 5 Vdc on Control Printed
Circuit Board surges to
greater than 8 Vdc.
4. Loss of speed set pot.
5. START switch stuck OFF.
6. STOP switch stuck ON.
7. RUN command line is open.
8. 30 Vdc on Control Printed Cir-
cuit Board surges to greater
than 40 Vdc.
9. Door closed switch OPEN.
10. Latch lock switch OPEN.
1. Loss of bit in timing string.
Defective Control Printed Cir-
cuit Board or Timer Encoder.
9. Display Printed Circuit Board
destroyed. Replace board.
10. Locate problem in 5V supply.
Repair.
11. Display Printed Circuit Board
destroyed. Replace board.
1. Locate problem in 30 Vac
supply. Repair.
2. Motor Control Printed Circuit
Board destroyed. Replace
board.
3. Motor Control Printed Circuit
Board destroyed. Replace
board.
4. Replace pot.
5. Replace switch.
6. Replace switch.
7. Repair.
8. Control Printed Circuit Board
destroyed. Replace board.
9. Switch defective or magnet
missing. Replace.
10. Switch out of adjustment or
defective. Adjust or replace.
1. Replace the Control Printed
Circuit Board or Timer
Encoder.
AC to centrifuge, but no dis-
play. (continued)
Display functioning, but centri-
fuge will not start.
Timer does not function cor-
rectly.
1. Timer does not work.