Sony UP-D70XR, Service Manual

Page: 72 / 96

5-2
UP-D70XR
.
THRESHOLD (Threshold level of sensor)
The current setting threshold levels of three sensors (ribbon code, bar code, OHP) are appeared by
depressing [
→
] key.
RBN BCD OHP
110 121 117
Check sensor level whether it is normal or abnormal by dust or something.
Numerical value of threshold.
a. Decision of threshold level
Decision of sensor H or L level is performed by judging the threshold level that is decided just before
printing. When printing is ended, the threshold level that is used in next printing is decided by
electric potential of this printing H, L level. Initial value of threshold level is decided by electric
potential of receiving light side when adjusting sensor luminance quantity.
b. Numerical value indication
Electric potential of sensor is obtained by 8 bit A/D conversion. Threshold indication is also based
by 8 bit A/D conversion. Electric potential of each threshold level is obtained as follow expression.
Electric potential = 5
x
(indication value/255)
c. Abnormal value
In case indication value is more than 229 (4.5 V) or less than 25 (0.5 V), the value can be judged
abnormal.
.
TOTAL PRINT (Total printing quantity of thermal head)
When depressing [
→
] key, total printing quantity of thermal head is indicated.
TOTAL = 1000
When depressing [
←
] key during above indication, total printing quantity of the unit is indicated.
TOTAL = 5000
(Absolute)
.
ERROR RESET (Recovery of sensor or motor trouble.)
When depressing [
→
] key, abnormal motor or sensor name is indicated.
HEAD MOTOR
[
→
]
When repair is completed, next indication is appeared by depressing [
→
] key. And error condition is
recovered by depressing [
←
] key.
CLEAR : PRESS [
←
]