Citizen Systems Citizen CT-S4000 - Manual (Page 27)

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● Black Mark detection error (in Black Mark mode)
When Black Mark cannot be detected even if a certain amount of paper feed
is carried out for Black mark detection, a Black Mark detection error occurs. If
black detection continues more than the specified period, a No Paper condition
is assumed and the same error as No Paper is indicated.
Lighting and blinking status of each error including the above is shown below.
Status POWER LED ERROR LED Buzzer
Paper-end Lights Lights
Paper near-end Lights Lights
Printer cover open Lights Lights
Printer cover open Lights
error *1
Cutter lock error Lights
Head overheat error Lights
Motor overheat error Lights
Memory check error Lights
Low voltage error Lights
High voltage error Lights
Macro execution Lights
wait *2
Black Mark detection Lights
error
*1: When the printer is printing.
*2: The ERROR LED may blink even in the execution of macro function.
4.7 When the Paper Cover Cannot Be Opened
If the cutter blade remains protruded due to paper jam or for any abnormality,
opening the paper cover may be disabled. In this case, do not open the paper
cover forcibly. Insert a Phillips screwdriver (size #1) into the cutter lock releasing
feed hole and turn it in the direction of arrow (clockwise).
When you find that both ends
of the blade reached the lowest
p o s i t i o n , s t o p t u r n i n g t h e
screwdriver. Open the cover
and follow the procedure of
removing jam or other cause of
trouble.
Cutter lock
releasing feed hole
Phillips screwdriver