Brother KE-430B Service Manual page 194

8. ELECTRIC MECHANISM
Error status #16 Error code appears on the display window after the machine operates.
Probable causes
2. A malfunction occurs due to
noise or main PROM is
defective when error code
E-21 appears
machine is started.
([E.21]: KE-436B, 436C).
3. Power supply voltage ab-
normally lowers when error
code E-90 appears after the
machine is started.
([E.90]: KE-436B, 436C).
Error status #17 The machine cannot produce correct stitches.
Probable causes
1. Synchronizer defective
2. Pulse motor is defective or
mechanical adjustment is not
appropriate when stitching
deviates from what it should
be.
Error status #18 The thread trimmer does not operate.
Probable causes
1. Home position sensor not
adjusted properly
2. Thread trimmer
defective
187
a. Make sure that the ground wire is surely
grounded and there is no equipment that
generates strong electrical noise in the
after the vicinity.
b. If the machine has been remodeled,
return the machine to its original condition
before checking.
c. If the error still occurs after replacement
of PROM, put the original PROM back
before checking.
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.
If 550VA/machine is not allocated at the
power source, the voltage will drop as soon
as the machine is started, resulting in this
error.
• See #16-1.
a. See #8-4.
b. If stitching
insufficient pressure of the work clamp,
see "Adjusting
amount" for adjustment.
c. Make adjustments if the feed mechanism
has any unnecessary looseness.
• Adjust the thread trimmer mechanism
(page 54, 55 and 86).
(When it is obvious that the thread trimmer
does not operate, perform the check/
repair/adjust items of #18-2 and #18-3.)
solenoid • Separate P5 (SOL) connectors on the
main circuit board, and then measure the
resistance between pins 1 and 2 in the
connector on the cable.
If the resistance is 7–8 , the solenoid is
not defective.
3647Q
KE-430B, 430C series
Check/ repair/ adjust
Check/ repair/ adjust
deviates because
the work clamp
Check/ repair/ adjust
Parts to be replaced
PROM
Parts to be replaced
of
lift
Parts to be replaced
Thread trimmer sole-
noid