Brother KE-430B Service Manual page 186

8. ELECTRIC MECHANISM
Error status #2 Error code appears on the display window when the power is turned on.
Probable causes
2. PROM chip defective or main
circuit board defective when
the error code E-80 appears
on the display window.
([E.c0] KE-436B, 436C)
3. Foot switch remains pressed
when error code
appears on the
window.
([E.14], [E.15]
436C)
4. A switch on operation panel
remains pressed when error
code E-82 appears on the
display window.
([E.17] KE-436B, 436C)
5. Power supply voltage drops
abnormally when error code
E-90 appears on the display
window.
([E.90] KE-436B, 436C)
6. Power supply voltage rises
abnormally when error code
E-91 appears on the display
window.
([E.91] KE-436B, 436C)
7. Control box has overheated
when the error code E-d0
appears on the
window.
([E.c2] KE-436B, 436C)
8. Main circuit board defective
when the error code E-E0
appears on the
window. (other
KE-436B, 436C.)
9. Cord defective when the
error code E-F1 appears on
the display window.
([E.F1] KE-436B, 436C)
179
a. Check the PROM chip is securely
attached to the main circuit board without
its lead bent.
b. Check the PROM chip is attached to the
main circuit board with letters MN and IM
on the PROM chip and those on the main
circuit board matching.
• See #7-1 and #7-2.
E-81
display
KE-436B,
• Check that P8 (PANEL) connectors of the
main circuit board and P1 (PANEL)
connectors of the panel circuit board are
plugged in.
<KE-436B, 436C>
• Check that P20 (RSPORT) connectors of
the main circuit board and P5 (DRV)
connectors of the panel circuit board are
plugged in.
a. Make sure that the power supply voltage
of the wall socket is within ±10% of the
voltage specification.
b. See #1-2 and #1-3.
a. Make sure that the power supply voltage
of the wall socket is within ±10% of the
voltage specification.
b. See #1-2 and #1-3.
a. Clean the ventilation outlet of the control
box.
display b. Keep the control box open for a while to
allow the inside to cool down and then
turn on the power again.
If the same code still appears on the
display,
defective.
• Turn on the power again.
If the same code still appears on the
display display, the main circuit board is defective.
than
• Check P2 (PER) connectors are attached
to the power supply circuit board and P16
(PER) connectors are attached to the
main circuit board. Check the cord
connecting P2 and P16 is not damaged.
KE-430B, 430C series
Check/ repair/ adjust
the main circuit board
Parts to be replaced
PROM chip
Main circuit board
Foot switch
Foot switch
assembly
Panel circuit board
Panel cord
Panel circuit board
Main circuit board
is
Main circuit board
PER cord
cord