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PN-E702/E602　TROUBLESHOOTING

 7 – 2

Is the AC cord properly inserted?

No

Insert the AC cord properly.

Is the power SW turned ON?
Is the power SW free from any abnormality?

No

Replace the abnormal part.

Replace the main power PWB unit.

Yes

Replace the abnormal part.
Replace the main PWB.

No abnormality 

No abnormality

Is the fuse of AC Relay PWB (F1, F2) blown?

Replace the defective part.

No abnormality

Abnormality

No abnormality

Abnormality

Abnormality

If the signal input is not supplied, the power save 
function is operated to interrupt the output of 
UR13.2V/PNL12V from the sub power source. 

Check the power cable.  
Check the fuse (F103) for breakage.  
Can it communicate via RS232C/LAN?
Check the main PWB.

Check the main PWB and the related parts for any 
abnormality. 

Replace the abnormal part.
Replace the key PWB.

Check the key PWB and the related parts for any 
abnormality. 
   Check the connection cable.  
   Any problem with the key PWB?

Abnormality

Is 5V outputted from CN200 on the 5V power unit ?

Replace the 5v power unit.

No abnormality

No

Are BU5V and 13.5V outputted from connector: PD on 
the main power unit, and LCD12V from CN301, and 
INV24V from CN401/402?

PN-E702/E602　TROUBLESHOOTING

 7 – 3

Is the battery power alive?

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

No abnormality 

Yes

Consumption

No

Replace the battery.

Clear the setting.

Replace the abnormal part.
Replace the main PWB.

No abnormality

Abnormality

Abnormality

Check the main PWB and the related parts for any 
abnormality. 
   Check the connection cable.  
   Check the fuse (F103) for breakage.  
   Check the PWB.

Replace the abnormal part.
Replace the Key PWB.

Check the key PWB and the related parts for any 
abnormality. 
   Check the connection cable.  
   Any problem with the Key PWB?

Check the adjustment and setting for any abnormality.

Readjust and reset with the menu.

Is input selection set to signal input?

Adjust the input source properly.

Replace the graphic board. 
Check the connected devices.

Replace the abnormal part.

Is the menu displayed under the signal input state?

Replace the abnormal part.

No abnormality

Yes

No abnormality

Yes

Yes

Abnormality

Abnormality

Abnormality

No

No

No

HDMI connection only
    Any defect with the connected devices?
    Is the graphic board resolution proper?

Check the  main PWB and the related parts.
    Check the connection cable.  
    Check the fuse (F102, F801) for breakage. 
    Can it communicate via RS232C/LAN?
    Check the PWB.

Check the video input signal for any abnormality. 
   Check the video cable. 
   Check that the video signal is not a special one  
   (out of support).

Check the LCD module and the related parts for any 
abnormality.
    Check the connection cable.  
    Check the LCD control PWB.

Vcom (Common electrode voltage) 
adjustment is required when replaced C-PWB 
or LCD module.

PN-E702/E602　TROUBLESHOOTING

 7 – 4

Any problem with the adjustment/ settings?

OK

OK

OK

Does the signal input correspond to the selected input?

Yes

Yes

Yes

Is the menu displayed with the signal being input?

Replace the expansion I/F PWB. 

Problem found

Make readjustment/ resetting from the menu.

Select the input source properly.

Replace the graphic board.
Check the connected devices.

Replace the defective part.

Replace the abnormal part.

Problem found

Problem found

No

No

No

DVI connection only
   Any problem with the connected devices?
   Any problem with the resolution of graphic board?

Any defect with the LCD module and related devices? 
   Any defect with the connecting cable?
   Any defect with the LCD control PWB?

Any defect with the video input signal of BNC?
   Any problem with the terminal setting?
   Is the BNC connection proper?
   Any defect with the video cable?
   Is the video signal a particular kind? (Out of support) 

Any defect with the main PWB and related  
devices?
   Any defect with the connecting cable?
   Did the fuse (F102, F801) blow out?
   Can it communicate via RS232C/LAN?
   Any defect with the PWB?

Vcom (Common electrode voltage) 
adjustment is required when replaced C-PWB 
or LCD module.

PN-E702/E602　TROUBLESHOOTING

 7 – 5

*

1

PN-E702: 170V - 210V (L1 - L2)
PN-E602: 80V - 107V (L1-1pin - 2pin)

Yes

Replace the abnormal part. 
Replace the main PWB.

No

Yes

No

Abnormality

Check the main PWB for any abnormality. 

Check the connection cable.  
Check the fuse (F102) for breakage.

   Can it communicate via RS232C/LAN?
   Check the main PWB.

When the power is turned on, the backlight lights up for 
several seconds.

3

Refer to page 7 - 2  "1. THE POWER IS NOT 
SUPPLIED (THE LED DOES NOT LIGHT UP)".

Yes

Refer to page 7 - 9  "11.THE RED LED 
BLINKS".

3

Any problem with the cable to the backlight?

Yes

Replace the LCD module.

Abnormality

Replace the cable.

Are BU5V(about 5V) and UR13.2V (about 13.5V) outputted from 
connector PD on the main power unit?
Is specified voltage   or greater is outputted from connector L1?

*1

Is the sound volume is set to the minimum or mute?

Readjust and reset. 

Replace the abnormal part. 

Replace the abnormal part.

Replace the abnormal part.

Replace the abnormal part.
Replace the main PWB.

No abnormality

No abnormality

No abnormality

No abnormality

Is input selection set to audio signal input?

Yes

No

Abnormality

Abnormality

Abnormality

Abnormality

Abnormality

Check the audio input signal for any abnormality. 

Check the cable connection. 
Check the audio cable. 

Check the audio output cable for any abnormality. 

Check the cable connection. 
Check the audio cable. 

Check the speaker cable. 
Check the speaker. 

Check the connection cable.  
Check the fuse (F101) for breakage. 
Can it communicate via RS232C/LAN? 
Check the PWB.

Any defect with the internal speaker and related 
devices?

Check the main PWB and the related parts for any 
abnormality.

Select the input source properly.