Sam4s ER-380F - Troubleshooting; Power Problem

SAM4S ER-380M/F SERIES 8-1
8 Troubleshooting
8-1. Power Problem
End
Power
Problem
Power Out
Ok? On Trans
Y
N
1. Check the Power Cable
2. Check the Power S/W PWB.
3. Check the Power Transformer.
Power VDISP
(+30V) Ok?
Power VDRV
(+24V) Ok?
Y
1. Check the Fuse (FU1) on Main PBA
2. Check the Bridge Diode(BD1) on Main PBA
3. Check the VDRV signal whether it is short.
1. Check the Bridge Diode(D4,5,6,7) on Main PBA
2. Check the VDISP signal whether it is short.
N
N
Power VPRT
(+8.5V) Ok?
Power VCC
(+5V) Ok?
Y
Y
1. Check the IC34063 (U4)
2. Check the TR1010,708 (Q10,6)
3. Check Generated Frequency
4. Check the VPRT whether
it is short or open.
1. Check the mc7805(U5)
2. Check the Capacitor(C50)
3. Check the VCC whether
it is short or open.
N
Power VPH
(+8.5V) Ok?
1. Check the CPU P8.7
(VPH_ONOFF) Port
2. Check the TR1010,MMBT2222
(Q11,16,17) on Main PBA.
3. Check the VDRV signal whether it
is short.
Y
Y
N N