Samsung RB37A52N0SA [70/101] Troubleshooting

Samsung RB37A52N0SA [70/101] Troubleshooting
70
4. TROUBLESHOOTING
The unit is plugged In?
230V is applied at
INVERTER PBA CN102
terminals?
INVERTER PBA Fuse is blown?
DC320V is applied at
BD1 +/- terminals?
12V is applied at C106 terminals?
5V is applied at C108 terminals?
Start
Normal (Check again)
Plug in the unit
Check the wire connections
1) Replace Fuse(AC250V 5.0A)
2) Replace INVERTER PBA ASS'Y
Replace PBA ASS'Y
Replace PBA ASS'Y
Replace PBA ASS'Y
No
No
Yes
No
No
No
Yes
Yes
No
Yes
Yes
Yes
Caution
There is AC230V
or DC310V at the INVERTER
PBA Power Circuit. So, be
cautions When repairing the
unit or measuring values.
- When Checking the
INVERTER PBA refer to the
Operation descriptions and
"Reference" Section
4-2-7) When there is No Power (INVERTER PBA) A+++
15V is applied at ZD501 terminals?
Panel PBA operates normally?
Is there PBA Short or breakage?
1) Check the REG2
2) Replace PBA ASS'Y
1) Check the wire Connections
2) Replace PBA ASS'Y
1) Do Re-soldering
2) Replace PBA ASS'Y
No
No
No
Yes
Yes
No
- Check the connection of Door
Panel PBA
☞SMPS Secondary Volt
checking(+12V) : REG1:At both Terminals
DC12V±0.8V
INVERTER PBA
Check
☞SMPS Secondary Volt
checking(+5V) : REG1:At both Terminals
DC5V±0.4V
☞SMPS Secondary Volt
checking(+15V) : ZD501:At both Terminals
DC15V±1.5V

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