Operating Voltage Functional Test; Use And Functions Of Leds - Bernina B 590 Service And Maintenance Manual

3.2 Operating Voltage Functional Test

PCBA-Base voltages are displayed on the PCBA-Base via LEDs.

3.2.1 Use and functions of LEDs

What to test: Upper LED 35V
Target state: lit
Actual status:
not lit
• Check the wiring for deformation,
Repair note:
• Check the connectors for
• Check PCBA-Power functioning.
• Replace PCBA-Base.
BERNINA International AG
tears or breaks. Replace if
necessary.
deformations. Replace if
necessary.
Replace if necessary.
Seestrasse 161 CH-8266 Steckborn
DRAFT – VERSION
Lower LED 5V
lit
not lit
• Replace PCBA-Base since this 5V are
generated directly on the PCBA-Base.
Schweiz Seite 25 von 172