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Plug in again and check for loose
plug.
Check at the SMPS PBA.
- Check Main PCB connection.
- Check the connections between upper
hinge and CABI-door.?
- Check the connections between door
and panel PCB.
DIAGNOSTIC
6-1) If power is not ON
At the power of main PCB, the 115V AC and a high-voltage over DC 170V occur.
Please be careful wih repair and measurement
Is it plugged in?
Is 170V DC applied to both
terminals (+ and -) of BD1?
Is fuse on the SMPS PCB
breaking?
Is 115V AC applied to both
terminals of CN1?
Is the 5.8V DC voltage applied between
C and S of TOP S/W 246Y?
Is 12V applied both
terminals of C16?
Is 5V applied both
terminals of C19?
Does Panel PCB work
normally?
Is the load, such as
of relays and others normal?
Is there any short or
break of PCB soldering?
Normal
Start
To check the main PCB, please see
the “operation descriptions and
references” in the manual.
NO
YES
YES
NO
YES
YES
YES
YES
YES
NO
YES
Check the connection and
assembly of electric wires.
NO
Exchange fuse (AC 250V 2.0A)
YES
Check PCB Pattern and replace
BD1.
NO
Replace PCB Assembly.
NO
1) Replace U4(D10LC20U)
2) Replace SMPS PBA
NO
Replace REG1(KA7805)
NO
1) Check and troubleshoot the
assembly of electric wires.
2) Replace panel PCB.
NO
1) Replace the corresponding relay.
2) Check the contact of lead wire.
NO
Caution!
6060