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:'13/Dec
6. THE RED LED BLINKS
Display check result with particular operation or by the
execution of particular RS232C command to specify the
error position.
No error position confirmed.
Check the DC-DC PWB unit for any abnormality.
No abnormality found.
Check the LED driver PWB unit for any abnormality
No abnormality found.
Check the Switch PWB and the related parts listed below
for any abnormality
- Connection cable
- Switch PWB
No abnormality found.
- Check the Main I/F PWB and the related parts listed
below for any abnormality:
- Connection cable
- Main I/F PWB
7. THE LED LIGHTS UP IN ORDER OF RED -> GREEN -> RED -> GREEN
(TEMPERATURE ERROR)
Is the unit properly installed under proper environment?
Yes
Is the vent blocked?
No
Display check result with particular operation or by the
execution of particular RS232C command to specify the
error position.
No error position confirmed.
Check the Key PWB and the related parts listed below for
any abnormality
- Connection cable
- Key PWB
No abnormality found.
Check the Main I/F PWB and the related parts listed below
for any abnormality:
- Connection cable
- PWB
*1 Implementing countermeasure to defective parts
1: Input of 12V-voltage to the panel
2: Input of 24V-DC
3: Input of 12V-voltage to the speaker
4: Input of 5V-voltage to the Main power supply unit
Backlight: LED error
Error position
confirmed.
Abnormality found.
Abnormality found.
Abnormality found.
Abnormality found.
Error position
confirmed.
Abnormality found.
Abnormality found.
PN-K321/K322B TROUBLESHOOTING 7 - 4
Is there any abnormality in the error position?
Such as:
- Power failure
- Blown fuses F101 / F102
- Connection cable failure
Replace DC-DC PWB unit.
Replace LED driver PWB unit.
Replace the abnormal part.
Replace the Switch PWB.
Replace the abnormal part.
Replace the Main I/F PWB.
No
Check the installation requirements.
Yes
Remove the obstacles.
Is there any abnormality in the error position?
Yes
Replace the abnormal part.
Replace the Main I/F PWB.
Replace the abnormal part.
Replace the Switch I/F PWB.
Replace the abnormal part.
Replace the Main I/F PWB.
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