4-13
Problem Possible Cause
Display Panel Blank when System
is Powered on (continued)
Confirm Jumpers JP1-5 are configured correctly for line voltage. Refer to power
board schematic for details.
Unplug J8 and J17, and check continuity of transformer windings. Refer to
power board schematic for details.
Display: A[[ xxx Accessory error – Faulty accessory is connected, a hand controlled accessory
is erroneously actuated, or a footswitch is erroneously actuated. Ensure that
footswitches are not stacked on top one another. A[[ rH and A[[ LH indi-
cate problems with the accessories connected to the Hand Controlled and
Combination Monopolar Accessory Receptacles, respectively. A[[ FS indicates
a problem with the footswitch connected to either of the Monopolar or Bipolar
Footswitch Connectors.
Display: [p xx Control Panel error – Check for a faulty push button on the front control panel, a
control panel push button that has been pushed while the unit is being turned on,
or a faulty cable connection between the front panel and the display board.
Display: LFC xxx Last Fault Codes – the Tone Loudness Adjustment Down Key was pressed while
power was initialized. The generator must be reset to clear this condition. See
section 4.7.
Display: [AL The system is in the Calibration Mode. Calibration Mode is selected when the
configuration DIP switch in the second position on the Control/Display Board
is in the ON (Up) position and the Tone Loudness Adjustment Down Key is
pressed and held while power is turned on. See section 4.8.
Display: Err xxx Refer to Table 4.12 for list of Err codes and possible causes. If an Err code
appears, try cycling power. If it reappears, the unit should be taken out of service
until a qualified biomedical engineer can diagnose the problem.
Single and Dual Dispersive
Electrode Status / Alarm Indicators
flash alternating red.
A Dispersive Electrode is not connected to the system.
A Dual Dispersive Electrode is connected but is not properly applied to patient.
A Dispersive Electrode is connected but is not properly seated. Ensure the con-
nector is fully seated in the Two-Pin Dispersive Electrode Receptacle.
Flashing Decimal Points on the
Display
The system is in the Test Mode. Test Mode is selected when the configuration
DIP switch in the first position on the Control/Display Board is in the ON (Up)
position and the Tone Loudness Adjustment Down Key is pressed and held while
power is turned on. Note: When the Test Mode is active, most of the internal
safety monitoring is inhibited. See section 4.8.
No output power One or more connections inside the system are bad. Check:
• J5, Control/Display Board
• J12, Power board
• Faulty accessory – blade not seated fully
• Output board jacks not making contact
Low voltage power supplied to the Control/Display Board is bad. Check +12V
and +5V on the Control/Display Board.
Shorted RF Amplifier power MOSFET Q5.
(Note: A better indication of the problem will be provided by cycling power,
which will allow the generator to find a fault during POST.)
• Remove F1, F2, F4, F5, F6, and F7 on the Power board
• Using an ohmmeter measure between drain and ground on Q2, Q3, and Q4
for low resistance.
• Using an ohmmeter measure between gate and ground on Q2, Q3, and Q4
for low resistance.
• If either exhibit low resistance, either replace the faulty MOSFET or replace
the Power board.
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