Troubleschooting Procedure - KERN PNJ Service Manual

5 Troubleschooting procedure

0- er r / u- er r
Check memory
content
Not good
Reset address data
Return to initial
inspection
Tunning fork assy failure
PNJ_PNS-SH-e-2011
START
„88" appears on
NO
display
YES
Perform initial inspection
Display shows
Weight
Is display stable?
YES
Is capacity display
NO
stable?
YES
Corner error
Not Good
inspection
Corner error adjustment
OK
Linear error check Not Good
Linearity calibration
OK
Balance operates normal
Check output
waveforms
FAULTY
GOOD
Mechanical unit failure
Replace tunning fork
Replace mechanical unit
assy
Display weight
NO
Check stopper type FAULTY
OK
Is supply voltage of
circut correct?
OK
Is AC Adaptor
connected?
NO
Connect AC Adaptor.
Connectors ar
inserte?
Re-adjust
YES
Insert connection
APS-LF board is
normal
NO
YES
AJDP circut board failure APS-LF board failure
Replace the AJDP circut Replace the APS-LF
board board
NO
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