Service manual

• Flash detection.
From the EHT info, via D6303 and T7303, a flash will stop the H-drive and line output
stage immediately. The FLS bit in the status register of the HOP is set to 'high.' As the
duration of a flash is very short, the FLS bit will be reset to 'low' again after the flash
refresh and via a slow start the set will be started again.
Hardware Related Protections
Due to the architecture (with 'hot' deflection) there are two protections that are
'unknown' to the microprocessor, namely the 'BRIDGE_PROT' (coming from the line
stage) and the 'DEFL_PROT' protection (coming from the frame deflection stage).
If one of these protections is triggered, the set is positioned in 'Standby' mode. The
Painter will now try to restart the set. If this does not succeed after 5 times (after 30 -
60s.), the Painter will generate error 7 (this error can have several causes, such as
repeating flashes, BRIDGE_PROT/Non VFB leading to DEFL_PROT or a serious AC
power dip). A red LED will start blinking.