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6-2-6 Main SMPS Troubleshooting
Breck Down
Stand-By output
Normal
Operation?
Item
confirmation
1~3
Item
confirmation
4
ITEM
1. Is the Drain-Source of Q8201, Q8202, Q8205 shorten?
2. Is the Drain-Source of Q8301, Q8302 shorten?
3. Is the Drain-Source of Qs401 shorten?
4. CN302[5pin] is 'H' and Cn802[6pin] is 'L'? {Micom Board} → Stopped by the wrong level of output voltage
* Please return back the broken Power Supply
- It could be with difficulty finding the cause if you handle it first
- Unless you return back it when the broken Power supply has only a little damage. it could make the other problem.
Samsung Electronics
Fuse
Stand-By Circuit Problems
(F101, F103)
OPEN?
Item
Consider the Short of Input line or
confirmation
Bridge Diode section.
1-3
Consider a cause of the breakage
Confirm OV. UV of each Output
Sequence Circuit Problem
→ Breakage of PFC
→ Breakage of Low Voltage circuit
→ Breakage of Va circuit.
Result
broken Power supply and
Troubleshooting
Please return back the
request a service to
SANKEN
6-7
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Table of Contents
Troubleshooting
