Troubleshooting; Power Problem - Sam4s ER-5200 Service Manual

8 Troubleshooting

8-1. Power Problem

Power
Problem
Power Out
Ok? On Trans
Y
Power VDISP
(+30V) Ok?
Y
Power VDRV
(+24V) Ok?
Y
Power VCC
(+5V) Ok?
Y
End
SAM4S ER-5200 Series
1. Check the Power Cable
N
2. Check the Power S/W PWB.
3. Check the Power Transformer.
1. Check the Bridge Diode(BD1) on Power PWB
N
2. Check the Zenner Diode(ZD1) on Power PWB
3. Check the TR KSC945 (Q8) on Power PWB
1. Check the Fuse (FU1) on Power PWB
N 2. Check the Bridge Diode(BD2) on Power PWB
3. Check the VDRV signal whether it is short.
N
1. Check the IC34063(U2)
2. Check the TR 1010 (Q9)
3. Check Generated Frequency
4. Check the VCC whether
it is short or open.
Power VPRT N
(+8.5V) Ok?
Y
1. Check the IC34063 (U1)
2. Check the TR1010,708 (Q10,11)
3. Check Generated Frequency
4. Check the VPRT whether
it is short or open.
N
Power VPH N
(+8.5V) Ok?
Y
1. Check the CPU P10.2
(VPH_ONOFF) Port
2. Check the TR1010,MMBT2222
(Q13,14) on Main PWB.
3. Check the VDRV signal whether it
is short.
8-1