Thermal 2 Errorcode: [00216] Beam-balance prevented by the range of pulse heights


Service Information	The beam-balance determines the stroke profiles at the maximum pixel level and the minimum pixel level. A target profile is then calculated based on the NVS parameters med <media index> beamslope, med <media index> beamcurve, med <media index> scorr <spot pair> and the stroke profiles. This error indicates that the range between the stroke profiles at the maximum pixel level and the minimum pixel level is insufficient to meet the requirements of the target profile.
	Enabling the verbose information for the beam-balance sensor subsystem will display the stroke profiles at the maximum pixel level and the minimum pixel level and the target profile.
	Typically the beam-balance will succeed if the NVS parameter bbs maximumerror is increased or the NVS parameters med <media index> beamslope or med <media index> beamcurve are decreased.
Operator Action	Call service.
Causes	The stroke profile does not provide sufficient range to meet the requirements of the target profile.
Related Documents	COMMAND: bbs balance [nocal]
	COMMAND: vbs enable (<subsystem>\|all) <level>
	PARAMETER: bbs maximumerror
	PARAMETER: med <media index> beamslope
	PARAMETER: med <media index> beamcurve
	PARAMETER: med <media index> stroke <spot pair>
	PARAMETER: med <media index> scorr <spot pair>


Possible cause		Possible stuck pixel. The characteristics of the light valve may have changed and therefore the voltage setting may no longer be valid.

Suggested action		Run `bbsprofile.spt` and, if required, chop pixels. Follow the procedure in Maintaining the contrast ratio on a Thermal 2 head when stroke profile is poor.

Related Procedure(s)		Chopping pixels on a thermal 2 head Invalid Key Pixel Chopping Calculator Invalid Key