Polymerase Chain Reaction Cabinets
24
Defective main board
(for PCR only)
• Restart the cabinet 2 to 4 times.
• The Main Board is defective if the Main Board incoming
supply is between 6.75 – 8.25 VDC AND:
- All LED’s on the control panel are off
- The LCD is blank
- There is no Buzzer sound
• If these conditions exist replace the Main Board.
Note: When replacing main board, please re-connect all
the wires back correctly. Any wrong wiring may result in
damage.
• If these conditions DO NOT exist proceed to next step.
• See Layout A at the end of this section to locate the relay
board inside electrical panel.
• Measure the incoming voltage on the Relay Board at
terminal J1 (Note polarity, BLUE wire closest to edge is
negative). See Fig. 1.11 below to locate terminal J1.
• Voltage should be between 6.75 – 8.25VDC.
• If voltage is out of range, check connection between
SMPS and relay board.
• If voltage is correct, proceed to next step.
fan, light, and UV
are all inoperative)
Connection problem to
relay board
(for PCR only)
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