PN-A601 (serv.man3) - Sharp Monitor Service Manual (repair manual). Page 126

PN-A601　TROUBLESHOOTING

 7 – 3

Is the OSD setting properly configured?

No abnormality

No

No

Yes

No abnormality

Is 19V power output from the system power PWB?

Check the connected optional devices.

Configure the OSD setting again.

Replace the defective part.

Any problem with the Power Supply PWB 
related items?

ȷIs the fuse blown?
ȷAny problem with the Power Supply PWB?

Is the battery power alive?

Is the adjustment lock of "FUNCTION" set to [disabled]?

No abnormality 

Yes

Yes

Consumption

No

No

Replace the battery.

Is the OSD set to non-display?

Set to ENABLE the OSD display (special function).

Clear the setting.

Is the control kit connected?

Yes

No

1

Is the control kit setting set to "External"?

Yes

No

Set the control kit to "External."

Replace the abnormal part.
Connect the cable to the proper terminal.

Replace the abnormal part.

No abnormality

Abnormality

Abnormality

Any problem with the Control Kit or connection cable? 
   Any problem with the connection cable? 
   Any problem with the PWB?
   Is the control kit cable is connected to the sound  
   terminal?

Check the I/F PWB and the related parts for any 
abnormality. 
   Check the fuse for breakage.  
   Check the PWB.

1

Is the control kit setting set to "Built-in"?

Yes

No

Set the control kit to "Built-in."

Replace the abnormal part.

Replace the abnormal part.

No abnormality

Abnormality

Abnormality

Any problem with the key PWB or connection cable? 
   Any problem with the connection cable? 
   Any problem with the key PWB?

Check the I/F PWB and the related parts for any 
abnormality. 
   Check the fuse for breakage.  
   Check the PWB.