Mitsubishi Electric SD206U Service Manual page 4

TROUBLESHOOTING
Power source 1
No Power Source
after turning on
Check AC socket
and connector
OK
Check AC
power cable
OK
Check Fuse
OK
Check LED and
keypad FPC cablet
OK
Check
5V standby
output
OK
Check MAIN
PCB ASSY and AC
power cable
NG
Replace AC
socket
NG
Replace AC
power cable
NG
Replace Fuse
Replace keypad
NG
and keypad FPC
cable
NG
Replace POWER
PCB ASSY
NG
Replace MAIN
PCB ASSY
Fan failure after
turning on
Check fan
connection
OK
Check fan
OK
Check MAIN
PCB ASSY
- 1 -
NG
Reconnect fan
NG
Replace fan
NG
Replace MAIN
PCB ASSY