LG HW300Y Service Manual page 26

1. Trouble shooting - No power
Check +19.5V.
LED_ L13, L14
ok
Check ST_5V
MAIN_P8001 (PIN 1, 2, 3)
ok
Check -3.57VST
IC8009 PIN 2
ok
Check X8101 clock
32.768 KHz
ok
Check Operating FAN
ok
1.Check 1.2V_Core : L8004
2.Check 3.3V : L8015
3.Check 1.8V : L8012
4.Check 1.8V_DDR : L8011
5.Check 14.6V : L205
6. Check 2.5V : L8017
7. Check 1.9V : L8022
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Only for training and service purposes
No
Replace JK17
No
Check LED_ L13, L14
No
Replace IC8009
No
Replace X8101
No
1.Check 14.6V :L205
2.Check IC202
3.Check FAN1/2 Signal line : L203, L204
4.Check FAN1/2_TACH : P200/201 Pin2
1.Check Power On/Off : R8003
2. Check R8060, IC8005
3.Check IC8002, R8052
No
4.Check IC8002, R8052
5.Check L8002, L8003, Q8002, D8001, IC8003
6. Check R8059, IC8004
7. Check R8082, IC8006
LGE Internal Use Only