Troubleshooting - Sam4s ER-5200 Service Manual

8 Troubleshooting

8-1. Power Problem
Power
Problem
Power Out
Ok? On Trans
Power VDISP
(+30V) Ok?
Power VDRV
(+24V) Ok?
Power VCC
(+5V) Ok?
End
SAM4S ER-5200 Series
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N
Y
N
Y
N
Y
N
Y
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.
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1. Check the Power Cable
2. Check the Power S/W PWB.
3. Check the Power Transformer.
1. Check the Bridge Diode(BD1) on Power PWB
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
2. Check the Bridge Diode(BD2) on Power PWB
3. Check the VDRV signal whether it is short.
Power VPRT
(+8.5V) Ok?
Y
Power VPH
(+8.5V) Ok?
Y
N
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
N
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