Manual
SYMPTOM POSSIBLE CAUSE
Geo has velocity drop-off during rapid fire.
On/Off Purge System is leaking from front 
hole.
Geo Trigger is very “bouncy”.
The Break Beam Sensor System does not 
appear to be reading correctly.
The Break Beam Sensor System is not 
reading at all.
Two or more balls are being fed into the 
breech. 
Geo is inconsistent.
Break Beam Sensor System turns itself off 
after firing.
When the Geo powers up,, the right hand 
side of the screen is not displayed and the 
marker will not fire
Poorly maintained Inline Regulator.
Battery is poor quality or has insufficient power.  
006 NBR 90 o-ring inside OOPS Insert is 
damaged or dry.
Incorrect filter settings. 
The Break Beam Sensor System is dirty.
Break Beam Sensors are the wrong way around.
There is a broken wire or contact, or a short 
circuit on either of the Breech Sensor cables.
Either sensor is back to front. 
Detents are broken/missing
Inline Regulator is supercharging.
Eye is dirty.
Eye is faulty.
Eye is out of place.
The trigger is permanently depressed.
Strip, lubricate and rebuild Inline Regulator.
 Use an Alkaline or metal hydride battery.  Do 
not use a low quality or rechargeable battery.
Replace the 006 NBR 90 o-ring and lubricate 
with Eclipse Grease.
Check that your trigger filter and debounce 
settings suit your trigger set-up.
Clean the Break Beam Sensor System as per
he Maintenance Section.
Check that the red receiver is on the right-hand 
side of the Breech. 
Check the plug of the cables.
Check for cuts or pinches in the sensor cables.
Check that the sensors face each other when 
installed. 
Change the rubber finger detent.
Strip and clean Inline Regulator. 
(See Maintenance Section .
Clean the eyes.
Replace the eyes.
Re-Install Eyes. Check alignment.
Adjust the Trigger until the selected Trigger 
detection method is activated when the Trigger 
is released.
SOLUTION
SYMPTOM POSSIBLE CAUSE
The Geo is chopping or trapping paint.
The Geo does not fire.
The Geo does not cycle fully. 
The Geo has low velocity on the first shot. 
The Geo has high velocity on the first shot. 
Geo has velocity drop-off during rapid fire.
The Bream Beam Sensor System is dirty causing 
the incorrect detection of paintballs.
Trigger and trigger detection method are set up 
incorrectly. 
Solenoid Assembly is not plugged into Geo PCB 
correctly.
The Break Beam Sensor System is enabled but 
there is no paintball in the breech.
The Micro-switch is not being activated. 
Micro-switch is damaged. 
Sticky or faulty Back-check Assembly in Solenoid.
Bolt Assembly dirty or incorrectly lubricated.
Dwell set too low. 
FSDO parameters are set too low to overcome 
o-ring stiction.
FSDO parameters are set too high.
Inline Regulator pressure creeping.
Air system/regulator does not flow fast enough 
to keep up.
Sticky o-rings in Bolt Assembly.
Blocked Filter in Solenoid Assembly.
Incorrectly assembled Back-check Assembly.
Clean the Break Beam Sensor System. 
Set up trigger correctly (refer to  “Setting the 
Trigger” section). 
Plug Solenoid Assembly plug into its port on 
the Geo PCB. 
Fill loader with paint. 
Adjust Micro-switch activation screw 
accordingly.
Replace circuit board.
Check Back-check Assembly, clean and replace 
as necessary.
Clean, relubricate and replace o-rings on Bolt 
as necessary.
Increase Dwell.
Adjust FSD COMP and FSD DLY parameters.
Adjust FSD COMP and FSD DLY parameters.
Strip, clean and maintain Inline Regulator. 
Replace Inline Regulator Piston if  necessary.
Try another air system/regulator and replace 
as necessary.
Clean, relubricate and replace o-rings on Bolt 
Assembly as necessary.
Clean/replace Filter in Solenoid Assembly as 
necessary.
Remove Back-check Assembly, rebuild correctly 
and replace.
SOLUTION
FAUlT FINDING
74.
CONTENTS
ORIENTATION
QUICK SET-UP
USING YOUR GEO
ADVANCED SET-UP
MENU TREE
MAINTENANCE
FAULT FINDING
SERVICE CENTERS
PARTS LIST
SPARES & ACCESSORIES
75.
FAUlT FINDING
FAULT FINDING
QUICK GUIDE










