Daewoo DM-K40 Service Manual
Page 34
3.6. Front Control Trouble Service Flow Chart
Front Control Trouble
NG
Check between CN1 and CN903 Connection
OK
Replace
Check between CN2 and CON2 Connection
NG
OK
NG
Check U2 Pin14/27/38Voltage See: 3.1
Check U2
OK
OK
Replace VFD
SEG Signal
NG
OK
Check U1 Pin1/2/34/35 Voltage Replace U2
NG
Replace U1