Troubleshooting - Sam4s ER-5100? SERIES Service Manual

6 Troubleshooting

6-1 Troubleshooting
Problem
Power Out
Ok? On Trans
Power VDISP
(+30V) Ok?
Power +24V
Power VCC
(+5V) Ok?
SAM4S ER-5100II SERIES
Power
N
Y
N
Y
N
Ok?
Y
N
Y
End
1. Check the Power Cable
2. Check the Power S/W PCB.
3. Check the Power Transformer.
1. Check the Bridge Diode(BD2) on Main PBA
2. Check the VDISP signal whether it is short.
1. Check the Fuse (FU1) on Main PBA
2. Check the Bridge Diode(BD1) on Main PBA
3. Check the Z-DIODE (ZD4)
4. Check the TR TIP142,2222A (Q19,Q20)
5. Check the +24V whether it is short or open.
1. Check the KA34063(U27)
2. Check the TR KSA1010(Q22)
3. Check the VCC whether it is short or open.
6-1