User Check - Page 243

Confidential

9-55

L-2 

The control panel does not work. 

User Check 

(1) No 

Possible cause 

Step 

Check 

Result

Remedy 

Key sticking 

1 

Any key on control 
panel is stuck. 

Yes 

Clean up the panel cover, or 
remove the burrs from panel 
cover and panel keys. 

Connection 
between main 
PCB and control 
panel PCB 

2 

Main PCB and 
control panel PCB 
are properly 
connected. 

No 

Fix the connection properly. 

Harness between 
main PCB and 
control panel 
PCB 

3 

Harness is damaged. 

Yes 

Replace the harness with a normal 
part. 

Rubber key 

4 

Replacement of 
rubber key solves the 
problem 

Yes 

Replace the rubber key with a 
normal part. 

Control panel 
PCB 

5 Replacement 

of 

control panel PCB 
solves the problem. 

Yes 

Replace the control panel PCB 
with a normal part. 

Main PCB 

6 

Replacement of main 
PCB solves the 
problem. 

Yes 

Replace the main PCB with a 
normal part. 

L-3 

Printing from Macintosh applications fails. 

User Check 

(1)  Verify that the printer driver supplied with the printer has been installed in the system folder 

and selected in the selector. 

(2)  Check the port selected in the selector.  The selected port has to match the actual port to 

which the printer cable is connected. 

Possible cause 

Step 

Check 

Result

Remedy 

Fault in printer 

1 

Test page can be 
printed using the 
method described in 

8.4.5 ‘Test Pattern 1’ 
in Chapter 8.

No 

Check the symptom of the 
problem and refer to an 
appropriate section in this 
Chapter to solve the problem. 

Breakage of main 
PCB 

2 

Printing can be made 
using an appropriate 
PC, printer cable, 
and RS-100M? 

No 

Replace the main PCB.