XO 4 & XO FLEX TROUBLE SHOOTING GUIDE
Version 3.30 17
5V OVERVOLTAGE PROTECTION
Protection against transient overvoltage’s that could damage or destroy electronic components and
PCB. It has a faster reaction than a fuse
NB: Only concerns the 5V of the unit generated on the “Power Supply PCB AN-371”.
The “Bridge PCB AN-368” is equipped with its own 5V DC/DC converter.
5V overvoltage protection affects : See the complete list in: “Backplane PCB” - 5V Connections
Control Pedal
“Foot Control Fail – Call service”
Displayed during start-up
“Network Fail – Call service”
Not possible to operate the chair
Operating light does not switch on
“Water clean” and “suction
Sensors does not light No message displayed
• Check the LED D6 situated on the “Power Supply PCB AN-371” is lit. When the LED is OFF
indicates that either the fuse F14 is blown, or the transformer is defective
•
Remove the control pedal cover
• Measure the 5V on pin J1 of cable CA-009 - Pin 3 (Yellow +5V) and Pin 4 (Green GND)
If 5V is present, see other symptoms connected with the displayed message.
If the 5V is not present, switch off the unit:
• Disconnect all the cables mentioned in the list “BACKPLANE - 5V Connections” below, from the
“Backplane AN-369”.
• Disconnect also the cable connecting the “Power supply PCB AN-371” J2 to the “Backplane
PCB AN-369” J30
• Measure if the 5 Volt on J2 “Power Supply AN-371” is present between on the pins
1. +5V: Pin 4 et 11
2. GND: Pin 6, Pin 13, Pin 14.
If the 5 volts is not present change the “Power Supply AN-371”.
When the 5 Volt is present:
• Reconnect the cables one by one while checking that the 5V is still present.
• Beware: Switch off the Unit off between each single cable connection.
• It is suggested to reconnect the following cables first as they are the most exposed to the risk of
short circuit.
3. Control pedal.
4. Joystick
5. “Water clean” and “Suction Clean” system cable
See the list below for more information on measurement points and checks to be performed.
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