Service manual

8 Trouble Shooting
8-4 SAM4S ER-650 SERIES
8-4 VFD Display Problem
End
VFD Problem
Control Signal
Ok?
Y
N
1. Check the CPU Control Pin (Data/CLK/Latch) .
2. Check the Harness.
Connector
Ok?
Power VDI,
VCC Ok?
Y
1. Refer to the Power Problem.
2. Check the Harness.
1. Check the Harness.
2. Check the CPU Disconnection Function
Pin(P10.7)
N
N
VFD PBA
Ass
y
Ok?
Y
Y
1. Check and Replace the VFD PBA.
2. Check the UCL5812.
3. Check the VFD.
4. Check THE Harness & Soldering Point.
N