Fritz Gegauf Bernina artista 630 Service Manual page 15

Ribbon cable function
What to Test
Electrical resistance of cable
Visual check
Electronic measurement by
ohmmeter or continuity tester
(beeper)
S-Print
What to adjust
Disconnect mains plug, remove
covers and unplug cables from
both printed circuits
Set measuring instrument to
beeper or Ohm area.
Check each cable wire.
This involves placing the
measuring tips on the top of the
connector against the metal
cutters to check each wire
against the other.
Service-Manual_artista_630_640_english_V4.01_032069_50_04.doc
Caution!
High voltage !
Desired status
Check cables for damage, short
circuits, and line disconnections
Check plug and socket for
damage, bent or loose contacts
Each wire individually:
If the wire is OK:
•
Defective wire:
Ohm on Ohmmeter: no beep
signal on beeper (interruption).
Each wire against the other
wires:
If the wire is OK:
Ohm on Ohmmeter: no beep
signal on beeper
Defective wire:
•
Ohm on the ohmmeter:
beep signal on beeper.
Ohm on ohmmeter; beep
signal on beeper (short
circuit, squashed wires)
15