4-2-5) When There Is No Power In Inverter Pcb (Inverter Comp) - Samsung RL60GG Series Service Manual

4. TROUBLESHOOTING
4-2-5) When there is no Power in Inverter PCB (Inverter Comp )
Caution
There is AC230V or DC300V at the
MAIN PCB Power Circuit.
So, be cautious when repairing the
unit or measuring values.
- Check MAIN PCB Connectors
- Check Wire Connection between
CABI and DOOR
- Check DOOR PANEL PCB
Connection
Start
No
Is 230V applied
at both of the Inverter PCB
CN102?
Yes
Is the INVERTER PCB
Fuse blown?
Yes
Is DC320V applied to
BD1+/- terminals?
Yes
Is DC 5.8V
applied between TOP S/W
Top245P C-S (C104)?
Yes
Is 12V applied to
both of C106 terminals?
Yes
Is 5V applied to
both of C108 terminals?
Yes
Does PANEL PCB
operate normally?
Yes
Do Relays operate normally?
Yes
Is there any short
or breakage on PCB
Soldering?
No
Normal
58
G/H/L/P/R/Z Option
- To check the MAIN PCB, refer to
the Operation and 'Refer' sections
in this manual
No
Check the wire connectors
No
Replace Fuse (250V 5A)
No
Check PCB Pattern and Replace BD1
No
Replace PCB ASS'Y
No
1) Replace D103 (RK49)
2) Replace PCB ASS'Y
No
Replace REG1 (7805)
No
1) Check the Wire Connection
and correct it if necessary
2) Replace PANEL PCB
Yes
1) Repair Related Parts or
Replace PCB