Sharp AR-CF2 Manuale Utente

: Jan. 9 2004

AR-CF2  TROUBLESHOOTING  8 - 2

Problem

Case1

Cause

Sub-tray pulling detection sensor fault 

Check and 
remedy

Measure a voltage on TP14 on the 
controller PCB and check that 5 V is 
observed when the sub-tray is in place, 
and that 1 V or less is observed when the 
sub-tray is pulled out. Replace the sensor 
if the measured voltage exceeds these 
ranges.

Case2

Cause 

Sub-tray pulling detection sensor fault

Check and 
remedy

Measure a voltage of TP15 on the 
controller PCB and check that 5 V is 
observed when the tray is in place, and 
that 1 V or less is observed when the tray 
is pulled. Replace the sensor if the 
measured voltage exceeds these ranges.

Case3

Cause 

Controller PCB fault

Check and 
remedy

If the problem is not solved by a change in 
the sensor level after the above cases 1 
and 2 are confirmed, replace the 
controller PCB.

Problem

Case1

Cause

JAM cover open/close switch fault 

Check and 
remedy

Check continuity between the switch 
contacts., Replace the switch if no 
conduction is measured. 

Case2

Cause

Reverse unit open/close sensor fault

Check and 
remedy

Measure a voltage of TP9 on the 
controller PCB and check that 1 V or less 
is observed when the reverse unit is 
open, and that 5 V is observed when the 
reverse unit is closed. Replace the sensor 
if the measured voltage exceeds these 
ranges.

Case3

Cause

Rack cover open/close sensor fault 

Check and 
remedy

Measure the voltage of TP10 on the 
control PWB and check that it is 1V or 
less when the base cover is opened and 
5V when closed.
If the voltage is outside the above 
specifications, replace the sensor with a 
new one.

Case4

Cause

Controller PCB fault

Check and 
remedy

If the problem is not solved by a change 
in the sensor level after the above cases 
1 to 3 are confirmed, replace the 
controller PCB.

Problem

Case1

Cause

Set sensor fault

Check and 
remedy

Measure a voltage of TP16 on the 
controller PCB and check that 5 V is 
observed when the inserter is set, and 
that 1 V or less is observed when the 
inserter is not set. Replace the sensor if 
the measured voltage exceeds these 
ranges.

Case2

Cause

Controller PCB fault

Check and 
remedy

If the problem is not solved by a change 
in the sensor level after the above case 1 
is confirmed, replace the controller PCB.

Problem 

Case1

Cause

Loose contact of the clutch connector 
terminal 

Check and 
remedy

Check continuity of the connector 
contacts. (CN4) 

Case2

Cause

Disconnection of the clutch coils 

Check and 
remedy

Inspect the coils for continuity. Replace 
the coils if no continuity is measured. 

Case3

Cause

Controller PCB fault 

Check and 
remedy

If the clutch does not perform in the clutch 
single operation mode, replace the 
controller PCB.