Bernina 1090 - Ending the Service Programme

А Danger high level voltage!
Mains voltage (see print L-1230)
Circuits on the power print L-1230, the main motor and the cord drum operate at dangerous
voltages. As some capacitors discharge approx. 30 seconds ofter pulling out the mains plug, you
should wait this long before touching print L-1230.
Test-programm model 1090 (service operation)
1. Test-programme start
— Remove beli cover
(service instructions model 11
— Sel service switch on the 5-ргі
position (refer to Fig. 5-КАО, page 10].
= Switch-on sewing machine/D.C. mains adaptor
unit. The sewing macl
programme no. 7 (step motors), move to and from
with an acustical noise.
— Push clear button (min. 2 зес.).
— Mount service panel.
The sewing machine is now in the
service operation. The individual test programmes
1107 can be selected from this stale. The initial
state can be selected Бу depressing the clear
button.
— Testprogramme по. 3 can only be left afier all 4
values have been memorized.
The following sensor signals can now be checked:
— Position indicator/ P-print (test 5 model 1130).
— Foot control digital and analog (new).
— Drive signal (partially covered in test 1, test
adaptor model 1130).
— Ret button (new).
— Adjust butionholer potentiometer (partially section
42 model 1130).
Termination of the test-programme
= Switch off the sewing machine/D.C. mains
adapter.
= Bring the service switch on the S-print into the
normal position.
The sewing machine can now be operated
normally.
Attention:
When changeing from normal operation Service
operation - normal operation.
— Bring the service switch into the desired position.
— Switch mains adapter off and then on again.
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