Printhead Position Sensor - Sharp SX 1075 Service Maintenance Manual

PRINTHEAD POSITION SENSOR

The printhead position sensor communicates to the
PLC the location of the printhead. If the sensor
does not indicate the printhead is in the "down"
position, the machine will not print.
TESTING
Parts of this procedure require that power is
applied to the machine.
WARNING
USE EXTREME CAUTION WHILE SERVICING
A MACHINE WHILE POWER IS APPLIED.
UNEXPECTED MACHINE
CAUSE SERIOUS INJURY.
WARNING
DO NOT ATTEMPT
MACHINE DURING NORMAL OPERATION.
KEEP HANDS AND
MOVING PARTS.
WARNING
WHILE TESTING
COMPONENTS WITH POWER APPLIED TO
THE MACHINE,
TROUBLESHOOTING
AVOID ELECTRICAL SHOCK.
1. Remove the outside frame cover.
Figure 3-253. Frame Cover Screws
SX™
Service and Maintenance Manual
PRINTHEAD CRADLE ASSEMBLY
STARTUP CAN
TO SERVICE THE
ARMS CLEAR OF
ELECTRICAL
USE PROPER
TECHNIQUES TO
SECTION 3 – COMPONENT REPAIR
2. Open the cradle cover, and check sensor
function. Take any small metal object (such as
a hex wrench) and pass in front of the sensor
(within 1/8"). While moving the object back and
forth, watch the PLC indicator lights. The light
for Input "X4" should illuminate when the
sensor is activated. If it does not, the sensor is
faulty and needs replacement.
Figure 3-254. The PLC
ADJUSTMENT
The printhead position sensor is adjustment free.
REPLACEMENT
Always remove electrical power from the
SX prior to performing any maintenance
on the machine.
3-101
PLC 'X4'
Input
WARNING
960714-02B © 2007 I2407