LG LMC1575ST - Trouble Shooting for Inverter PCB

5-19
Trouble shooting for inverter PCB
Heat sink
Bridge
Diode
IGBT
High Voltage
Transformer
DC
Capacitor
High
Voltage
Diode
Earth
Wire
Current
Transformer
Resonant
Capacitor
Communication
Connector
High
Voltage
Capacitor
Sub
PCB
Choke
Coil
MGT
(Output)
L - N
(Input)
CN3
L - N
D5
Q1
TH91
ZD201
D8
D9
CN3
L - N
D5
Q1
ZD201
TH91
D8
D9
Heat sink
IGBT
Bridge
Diode
Choke
Coil
DC
capacitor
L - N
(Input)
Downloader
Connector
Comm.
Connector
H.V Capacitor
H.V Transformer
Resonant
capacitor
Earth wire
High
Voltage
Diode
MGT
(Output)
Shunt resistor
<Inverter PCB ‘TOP’ view> <Inverter PCB ‘BOTTOM’ view>
※ Inverter PCB Most Check Points
• Communication Connector : CN3
• AC Terminal : L – N
• Bridge Diode : D5
• IGBT : Q1
• Zener Diode : ZD201
• Temp. Thermistor : TH91
• High Voltage Diode : D8, D9
LMC1575BD /00
LMC1575ST /00
LMC1575SW /00
LMC1575SB /00
LMC1575BD /01
LMC1575ST /01
LMC1575SW /01
LMC1575SB /01
LMC1575BD /00
LMC1575ST /00
LMC1575SW /00
LMC1575SB /00
LMC1575BD /01
LMC1575ST /01
LMC1575SW /01
LMC1575SB /01
Inverter PCB
(Inverter PCBA : EBR817180XX)