Ribbon-Feed Problem - Citizen CL-S6621 Technical Manual

Troubleshooting
Symptoms
Poor printing
Uneven print density

4-2-4. Ribbon-feed Problem

Symptoms
Ribbon is not fed at
all, or is not fed
correctly.
CL-S6621
Checks
1. The "SA, Head" is dirty.
2. Thickness adjustment is improper.
3. Is +24V supplied to the pins 1-4 of J15
on the "SA, Main PCB"? (GND: Pins
5-8)
[Bottom right of the "SA, Main PCB"]
1. Head balance is improper.
Uneven print density may appear either
on the right side or the left side.
Checks
1. Is the ribbon correctly inserted into the
ribbon holders?
2. Is the ribbon path correct?
3. Is the cable connected between J19 on
the "SA, Main PCB" and J102 on the
"SA, Ribbon PCB" firmly?
4. Are the cables connected between
J101/J107 on the "SA, Ribbon PCB"
and the "SA Ribbon Motor F" firmly?
5. Is the cable connected between J103 on
the "SA, Ribbon PCB" and the "SA
Ribbon Motor R" firmly?
(to be continued)
1. Clean it with a head cleaner.
2. Adjust the media thickness
adjustment dial to suit to the media
thickness being used.
3. Replace the "Unit, Power Supply".
1. Adjust the media width adjustment
dial to suit to the media width
being used.
1. Insert the ribbon correctly.
2. Install the ribbon correctly.
3. Connect it firmly.
4. Connect them firmly.
5. Connect it firmly.
4-8
Remedies
Remedies