Sensor Problems - Tally Dascom 7010 Series Maintenance Manual

Symptoms
Ribbon wrinkles
occur.
Ribbon tends to slip
on media. (May occur
faint printing,
displacement of
printing position, dirty
printing, etc.)
Printing continues
even when ribbon
runs out.
Ribbon slants.

4-2-5. Sensor Problems

Symptoms
Top cover is open,
but cover open status
is not detected (LCD
does not show " Error
Cover Open").
(Cover open sensor
problem)
Head block is closed,
but the LCD shows
"Error Head Open".
(Head up sensor
problem)
Checks
5. Has the Unit, Frame Ribbon L been
replaced with new one?
1. Is proper ribbon tension applied to both
supply and take-up side?
1. Is the Print Method menu set to "DT"
(Direct Thermal) for thermal media
printing?
1. Is the ribbon correctly inserted into the
ribbon holders?
2. Is the ribbon path correct?
Checks
1. Is the connector of the SA, Cover Open
Sens firmly connected to SA, Ope-Pane
PCB (J403)?
2. Cover open sensor is defective.
3. Failure in the ope-pane circuit.
4. Replace the in the control circuit.
1. Is the connector of the SA, Head Up
SW firmly connected to SA, Main PCB
(J9)?
2. Head up sensor is defective.
3. Failure in the control circuit.
5. Perform the ribbon tension
adjustment.
Refer to
Adjustment" in Chapter 3.
1. Adjust ribbon tension to suit to the
type and width of media.
1. Change the Print Method menu to
"TT (Thermal Transfer)".
1. Insert the ribbon correctly.
2. Install the ribbon correctly.
1. Connect it firmly.
2. Replace the SA, Cover Open
Sens.
3. Replace the SA, Ope-Pane PCB.
4. Replace the SA, Main PCB.
1. Connect it firmly.
2. Replace the SA, Head Up SW.
3. Replace the SA, Main PCB.
4-9
4-2. Troubleshooting
Remedies
"3-6-4. Ribbon Tension
Remedies