TROUBLESHOOTING
Before calling your GULBRANSEN KS1 dealer for technical assistance, please check the following
items. You may be able to avoid an unnecessary service call.
Symptom Probable
Cause
Solution
No lights on the panel.
Unit is turned off
Turn the unit on
Hint: The KS1’s power
indicator will always be on if
Power supply not plugged into
a live 110V outlet
Test the outlet with a lamp or some other appliance
the unit is on and has power.
Power connector has come
loose
Check the connection on the back of the control
unit
There is power, but no MIDI
output
MUTE button is on.
Press MUTE to turn it off. Light should go out.
Faulty keyboard adjust
Perform a new keyboard adjust.
Keyboard sensor strip not
connected, or connected to
wrong jack.
Verify that Connector J1 of the keyboard sensor
strip is connected to the SS88 jack on the rear
panel of the control unit
MIDI cable loose or missing
Verify that a good MIDI cable is plugged into
KS1 MIDI OUT and into external module's MIDI
IN
Wrong MIDI Channel or Mode
Verify external module is in correct MIDI mode
and is listening to the same channel the KS1 is
transmitting. To get started, set your external
module's MIDI mode to OMNI or MULTI. (It will
listen to all MIDI channels)
Misbehaving MIDI IN device
Try using a different sound module
Some notes do not play
Improper installation
Verify installation parameters and clearances
Faulty keyboard adjust
Perform a new keyboard adjust.
Stuck actuator
Verify actuator movement
Misbehaving MIDI IN device
Try using a different sound module
Incorrect velocities ("hot" or
"cold" notes - individual notes
that are too loud or too soft)
Faulty keyboard adjust
Perform a new keyboard adjust, taking care to
press each key firmly.
Improper installation
Verify installation parameters and clearances
Key bounce, or poor key
regulation
Adjust back checks, remove excessive slop or
play in key action
Will not accept keyboard adjust
Keyboard sensor strip not
connected, or connected to
wrong jack.
Verify that Connector J1 of the keyboard sensor
strip is connected to the SS88 jack on the rear
panel of the control unit
EEPROM has become
corrupted
Clear the EEPROM
