Service manual

October, 01 TTPM2 Operators’ Guide 17
4.8 Indicators on the printer
Different error types can show up during processing.
The most common is that the TTPM2 is out of paper.
All errors encountered by the printer, and requiring
operator assistance, are indicated with a signal from
an indicator on top of the printer. The operator then
has to follow a specific procedure depending on the
type of error that caused the stop. The procedures
are as follows:
• Yellow indicator lights up
Indicates "No paper" in the selected paper entry. Insert new paper supply or new -
single ticket. The document will be automatically loaded to active position.
• Yellow indicator ON and green indicator ON or flashing.
No paper in the selected paper entry. Ticket data has been received. Insert paper into
the selected paper entry.
• Red indicator lights up
Indicates unsuccessful read-after-write of the magnetic encoding. The TTPM2 makes
a second attempt to encode and read the ticket. During that attempt the red indicator
will go out. For each unsuccessful attempt, the red indicator lights up again.
• Red indicator is ON
If the Red indicator stays ON, even though ticket stock is present in the selected entry,
this indicates that the paper path in the TTPM2 has been blocked. Follow the descrip-
tion on the next page to remove the paper jam.
NOTE! No data is lost in the process of detecting and acting on errors as long as the
printer is not switched OFF. If, however, the printer is switched OFF by mistake when an
error is attended to, two tickets will normally be lost because of the error:
1) The ticket being printed will be lost.
2) The next ticket will be lost.
The reason for the next ticket being lost is that even though the printer has battery
backed up memory which preserves data, it is not possible to guarantee that no data is
lost in the serial communication during the power OFF condition. It is, therefore, neces-
sary for the printer to erase the input buffer and wait for either a clear or print command
before it can synchronize printing to incoming data.