Lenovo LXM-L19BH
Page 29 of 44
2. PANEL POWER CIRCUIT
NG
3. INVERTER CONTROL RELATIVE CIRCUIT
Check the Bklt-On relative circuit, R201, Q201,
In normal operation, when LED =green,
In saving mode, when LED=orange,
Replace Power board
Check C454 should have response from 0V to 5V
When we switch the power switch from off to on
Measured X401 waveform is normal?
Measured power supply for U401
OK
Check U701, Q403 is broken or CN403 solder abnormal?
Replace U701, Q403 or re-solder CN403
OK
NG
Replace U401
Replace X401
Check power
supply circuit
Replace Panel
NG
NG
OK
Содержание LXM-L19BH
Страница 12: ...Lenovo LXM L19BH Page 12 of 44 5 BLOCK DIAGRAM 5 1 SOFTWARE FLOW CHART h t t p w w w w j e l n e t ...
Страница 13: ...Lenovo LXM L19BH Page 13 of 44 h t t p w w w w j e l n e t ...
Страница 16: ...Lenovo LXM L19BH Page 16 of 44 Power Block Diagram h t t p w w w w j e l n e t ...
Страница 25: ...Lenovo LXM L19BH Page 25 of 44 7 PCB LAYOUT 7 1 MAIN BOARD h t t p w w w w j e l n e t ...
Страница 26: ...Lenovo LXM L19BH Page 26 of 44 7 2 Power Inverter Board h t t p w w w w j e l n e t ...