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Troubleshooting > Startup System Failure Diagnosis > Flow E: Low-voltage Power Supply (12V) System Flow > Flow for narrowing down troubles
Troubleshooting > Startup System Failure Diagnosis > Flow E: Low-voltage Power Supply (12V) System Flow > Flow for narrowing down troubles
Item
Check item
Location
(9)
AC driver PCB
J102
J102
5
4
2
1
Low-voltage Power
Supply PCB
J1
J1
5
3
7
1
1. Remove both J102 (pins 1, 2, 4, and 5) of the AC driver PCB and J1 (pins 5, 7, 1, and 3) of
the Low-voltage Power Supply PCB.
2. Check for the harness disconnection between the corresponding pins.
• Between J102 (pin 1) and J1 (pin 5)
• Between J102 (pin 2) and J1 (pin 7)
• Between J102 (pin 4) and J1(pin 1)
• Between J102 (pin 5) and J1 (pin 3)
3. Check for short-circuit of the harness between pins other than corresponding ones.
Item
Check item
Location
(10) Main Controller 2
J16(pin 4, 5)
Reference:
When the CHECK
BOARD PCB ASS’Y
(FY9-4050- 000) is
used
J16
4
5
5
4
Chassis
GND
CHECK BOARD PCB ASS’ Y
(
FY9-4050-000
)
T-6-31