Tally Dascom 7010 Series Maintenance Manual page 128

3-6. Adjustments
Adjustment procedure:
1. Remove the SA, Ope-Pane, SA, Front Right and SA, Front Center from the main body.
Refer to "3-5-8. Unit,
2. Open the head block by pushing the head open lever and remove the Unit, Head.
Refer to "3-5-1. Unit,
3. Remove the Ribbon Cover of the Unit, Frame Ribbon L form the Unit, Mechanism.
Refer to "3-5-12. Unit, Frame Ribbon
4. Ribbon Tension Check/Adjustment on Take-up Side:
1) Set the "Adjust screw for Take-up side ribbon tension adjustment" to "STANDARD"
position.
2) Set the "Ribbon-tension adjust ribbon (φ60mm)" to the take-up side ribbon holder.
3) Hook a spring gauge of 500gf on the "Ribbon-tension adjust ribbon" and slowly pull the
ribbon end downward at a constant speed (approx. 7.5cm/sec. or so). Then, check if the
reading of the spring gauge in the steady state is within 450 +/- 50gf.
If the reading is in the specified range, no tension adjustment is required on take-up side.
Proceed to step 5 "Ribbon Tension Check/Adjustment on Supply Side".
If not, proceed to the next sub step.
Adjust screw "A" (For Service)
When weak
When stronge
Adjust screw for Take-up side
ribbon tension adjustment
Mechanism".
Head".
L".
TENSION
STANDARD
LOW
N
RD
Ribbon-tension adjust ribbon
(φ60mm)
[Take-up side adjustment]
450 +/− 50gf
3-54